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jdk/src/hotspot/cpu/x86/stubGenerator_x86_64.cpp
Scott Gibbons 8e72d7cf8e 8320448: Accelerate IndexOf using AVX2 
Reviewed-by: epeter, kvn, sviswanathan
2024-06-07 17:02:14 +00:00

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/*
* Copyright (c) 2003, 2024, Oracle and/or its affiliates. All rights reserved.
* DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
*
* This code is free software; you can redistribute it and/or modify it
* under the terms of the GNU General Public License version 2 only, as
* published by the Free Software Foundation.
*
* This code is distributed in the hope that it will be useful, but WITHOUT
* ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
* FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
* version 2 for more details (a copy is included in the LICENSE file that
* accompanied this code).
*
* You should have received a copy of the GNU General Public License version
* 2 along with this work; if not, write to the Free Software Foundation,
* Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
*
* Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
* or visit www.oracle.com if you need additional information or have any
* questions.
*
*/
#include "precompiled.hpp"
#include "asm/macroAssembler.hpp"
#include "classfile/vmIntrinsics.hpp"
#include "compiler/oopMap.hpp"
#include "gc/shared/barrierSet.hpp"
#include "gc/shared/barrierSetAssembler.hpp"
#include "gc/shared/barrierSetNMethod.hpp"
#include "gc/shared/gc_globals.hpp"
#include "memory/universe.hpp"
#include "prims/jvmtiExport.hpp"
#include "prims/upcallLinker.hpp"
#include "runtime/arguments.hpp"
#include "runtime/javaThread.hpp"
#include "runtime/sharedRuntime.hpp"
#include "runtime/stubRoutines.hpp"
#include "stubGenerator_x86_64.hpp"
#ifdef COMPILER2
#include "opto/runtime.hpp"
#include "opto/c2_globals.hpp"
#endif
#if INCLUDE_JVMCI
#include "jvmci/jvmci_globals.hpp"
#endif
#if INCLUDE_JFR
#include "jfr/support/jfrIntrinsics.hpp"
#endif
// For a more detailed description of the stub routine structure
// see the comment in stubRoutines.hpp
#define __ _masm->
#define TIMES_OOP (UseCompressedOops ? Address::times_4 : Address::times_8)
#ifdef PRODUCT
#define BLOCK_COMMENT(str) /* nothing */
#else
#define BLOCK_COMMENT(str) __ block_comment(str)
#endif // PRODUCT
#define BIND(label) bind(label); BLOCK_COMMENT(#label ":")
//
// Linux Arguments:
// c_rarg0: call wrapper address address
// c_rarg1: result address
// c_rarg2: result type BasicType
// c_rarg3: method Method*
// c_rarg4: (interpreter) entry point address
// c_rarg5: parameters intptr_t*
// 16(rbp): parameter size (in words) int
// 24(rbp): thread Thread*
//
// [ return_from_Java ] <--- rsp
// [ argument word n ]
// ...
// -12 [ argument word 1 ]
// -11 [ saved r15 ] <--- rsp_after_call
// -10 [ saved r14 ]
// -9 [ saved r13 ]
// -8 [ saved r12 ]
// -7 [ saved rbx ]
// -6 [ call wrapper ]
// -5 [ result ]
// -4 [ result type ]
// -3 [ method ]
// -2 [ entry point ]
// -1 [ parameters ]
// 0 [ saved rbp ] <--- rbp
// 1 [ return address ]
// 2 [ parameter size ]
// 3 [ thread ]
//
// Windows Arguments:
// c_rarg0: call wrapper address address
// c_rarg1: result address
// c_rarg2: result type BasicType
// c_rarg3: method Method*
// 48(rbp): (interpreter) entry point address
// 56(rbp): parameters intptr_t*
// 64(rbp): parameter size (in words) int
// 72(rbp): thread Thread*
//
// [ return_from_Java ] <--- rsp
// [ argument word n ]
// ...
// -28 [ argument word 1 ]
// -27 [ saved xmm15 ] <--- rsp after_call
// [ saved xmm7-xmm14 ]
// -9 [ saved xmm6 ] (each xmm register takes 2 slots)
// -7 [ saved r15 ]
// -6 [ saved r14 ]
// -5 [ saved r13 ]
// -4 [ saved r12 ]
// -3 [ saved rdi ]
// -2 [ saved rsi ]
// -1 [ saved rbx ]
// 0 [ saved rbp ] <--- rbp
// 1 [ return address ]
// 2 [ call wrapper ]
// 3 [ result ]
// 4 [ result type ]
// 5 [ method ]
// 6 [ entry point ]
// 7 [ parameters ]
// 8 [ parameter size ]
// 9 [ thread ]
//
// Windows reserves the callers stack space for arguments 1-4.
// We spill c_rarg0-c_rarg3 to this space.
// Call stub stack layout word offsets from rbp
#ifdef _WIN64
enum call_stub_layout {
xmm_save_first = 6, // save from xmm6
xmm_save_last = 15, // to xmm15
xmm_save_base = -9,
rsp_after_call_off = xmm_save_base - 2 * (xmm_save_last - xmm_save_first), // -27
r15_off = -7,
r14_off = -6,
r13_off = -5,
r12_off = -4,
rdi_off = -3,
rsi_off = -2,
rbx_off = -1,
rbp_off = 0,
retaddr_off = 1,
call_wrapper_off = 2,
result_off = 3,
result_type_off = 4,
method_off = 5,
entry_point_off = 6,
parameters_off = 7,
parameter_size_off = 8,
thread_off = 9
};
static Address xmm_save(int reg) {
assert(reg >= xmm_save_first && reg <= xmm_save_last, "XMM register number out of range");
return Address(rbp, (xmm_save_base - (reg - xmm_save_first) * 2) * wordSize);
}
#else // !_WIN64
enum call_stub_layout {
rsp_after_call_off = -12,
mxcsr_off = rsp_after_call_off,
r15_off = -11,
r14_off = -10,
r13_off = -9,
r12_off = -8,
rbx_off = -7,
call_wrapper_off = -6,
result_off = -5,
result_type_off = -4,
method_off = -3,
entry_point_off = -2,
parameters_off = -1,
rbp_off = 0,
retaddr_off = 1,
parameter_size_off = 2,
thread_off = 3
};
#endif // _WIN64
address StubGenerator::generate_call_stub(address& return_address) {
assert((int)frame::entry_frame_after_call_words == -(int)rsp_after_call_off + 1 &&
(int)frame::entry_frame_call_wrapper_offset == (int)call_wrapper_off,
"adjust this code");
StubCodeMark mark(this, "StubRoutines", "call_stub");
address start = __ pc();
// same as in generate_catch_exception()!
const Address rsp_after_call(rbp, rsp_after_call_off * wordSize);
const Address call_wrapper (rbp, call_wrapper_off * wordSize);
const Address result (rbp, result_off * wordSize);
const Address result_type (rbp, result_type_off * wordSize);
const Address method (rbp, method_off * wordSize);
const Address entry_point (rbp, entry_point_off * wordSize);
const Address parameters (rbp, parameters_off * wordSize);
const Address parameter_size(rbp, parameter_size_off * wordSize);
// same as in generate_catch_exception()!
const Address thread (rbp, thread_off * wordSize);
const Address r15_save(rbp, r15_off * wordSize);
const Address r14_save(rbp, r14_off * wordSize);
const Address r13_save(rbp, r13_off * wordSize);
const Address r12_save(rbp, r12_off * wordSize);
const Address rbx_save(rbp, rbx_off * wordSize);
// stub code
__ enter();
__ subptr(rsp, -rsp_after_call_off * wordSize);
// save register parameters
#ifndef _WIN64
__ movptr(parameters, c_rarg5); // parameters
__ movptr(entry_point, c_rarg4); // entry_point
#endif
__ movptr(method, c_rarg3); // method
__ movl(result_type, c_rarg2); // result type
__ movptr(result, c_rarg1); // result
__ movptr(call_wrapper, c_rarg0); // call wrapper
// save regs belonging to calling function
__ movptr(rbx_save, rbx);
__ movptr(r12_save, r12);
__ movptr(r13_save, r13);
__ movptr(r14_save, r14);
__ movptr(r15_save, r15);
#ifdef _WIN64
int last_reg = 15;
for (int i = xmm_save_first; i <= last_reg; i++) {
__ movdqu(xmm_save(i), as_XMMRegister(i));
}
const Address rdi_save(rbp, rdi_off * wordSize);
const Address rsi_save(rbp, rsi_off * wordSize);
__ movptr(rsi_save, rsi);
__ movptr(rdi_save, rdi);
#else
const Address mxcsr_save(rbp, mxcsr_off * wordSize);
{
Label skip_ldmx;
__ stmxcsr(mxcsr_save);
__ movl(rax, mxcsr_save);
__ andl(rax, 0xFFC0); // Mask out any pending exceptions (only check control and mask bits)
ExternalAddress mxcsr_std(StubRoutines::x86::addr_mxcsr_std());
__ cmp32(rax, mxcsr_std, rscratch1);
__ jcc(Assembler::equal, skip_ldmx);
__ ldmxcsr(mxcsr_std, rscratch1);
__ bind(skip_ldmx);
}
#endif
// Load up thread register
__ movptr(r15_thread, thread);
__ reinit_heapbase();
#ifdef ASSERT
// make sure we have no pending exceptions
{
Label L;
__ cmpptr(Address(r15_thread, Thread::pending_exception_offset()), NULL_WORD);
__ jcc(Assembler::equal, L);
__ stop("StubRoutines::call_stub: entered with pending exception");
__ bind(L);
}
#endif
// pass parameters if any
BLOCK_COMMENT("pass parameters if any");
Label parameters_done;
__ movl(c_rarg3, parameter_size);
__ testl(c_rarg3, c_rarg3);
__ jcc(Assembler::zero, parameters_done);
Label loop;
__ movptr(c_rarg2, parameters); // parameter pointer
__ movl(c_rarg1, c_rarg3); // parameter counter is in c_rarg1
__ BIND(loop);
__ movptr(rax, Address(c_rarg2, 0));// get parameter
__ addptr(c_rarg2, wordSize); // advance to next parameter
__ decrementl(c_rarg1); // decrement counter
__ push(rax); // pass parameter
__ jcc(Assembler::notZero, loop);
// call Java function
__ BIND(parameters_done);
__ movptr(rbx, method); // get Method*
__ movptr(c_rarg1, entry_point); // get entry_point
__ mov(r13, rsp); // set sender sp
BLOCK_COMMENT("call Java function");
__ call(c_rarg1);
BLOCK_COMMENT("call_stub_return_address:");
return_address = __ pc();
// store result depending on type (everything that is not
// T_OBJECT, T_LONG, T_FLOAT or T_DOUBLE is treated as T_INT)
__ movptr(c_rarg0, result);
Label is_long, is_float, is_double, exit;
__ movl(c_rarg1, result_type);
__ cmpl(c_rarg1, T_OBJECT);
__ jcc(Assembler::equal, is_long);
__ cmpl(c_rarg1, T_LONG);
__ jcc(Assembler::equal, is_long);
__ cmpl(c_rarg1, T_FLOAT);
__ jcc(Assembler::equal, is_float);
__ cmpl(c_rarg1, T_DOUBLE);
__ jcc(Assembler::equal, is_double);
#ifdef ASSERT
// make sure the type is INT
{
Label L;
__ cmpl(c_rarg1, T_INT);
__ jcc(Assembler::equal, L);
__ stop("StubRoutines::call_stub: unexpected result type");
__ bind(L);
}
#endif
// handle T_INT case
__ movl(Address(c_rarg0, 0), rax);
__ BIND(exit);
// pop parameters
__ lea(rsp, rsp_after_call);
#ifdef ASSERT
// verify that threads correspond
{
Label L1, L2, L3;
__ cmpptr(r15_thread, thread);
__ jcc(Assembler::equal, L1);
__ stop("StubRoutines::call_stub: r15_thread is corrupted");
__ bind(L1);
__ get_thread(rbx);
__ cmpptr(r15_thread, thread);
__ jcc(Assembler::equal, L2);
__ stop("StubRoutines::call_stub: r15_thread is modified by call");
__ bind(L2);
__ cmpptr(r15_thread, rbx);
__ jcc(Assembler::equal, L3);
__ stop("StubRoutines::call_stub: threads must correspond");
__ bind(L3);
}
#endif
__ pop_cont_fastpath();
// restore regs belonging to calling function
#ifdef _WIN64
// emit the restores for xmm regs
for (int i = xmm_save_first; i <= last_reg; i++) {
__ movdqu(as_XMMRegister(i), xmm_save(i));
}
#endif
__ movptr(r15, r15_save);
__ movptr(r14, r14_save);
__ movptr(r13, r13_save);
__ movptr(r12, r12_save);
__ movptr(rbx, rbx_save);
#ifdef _WIN64
__ movptr(rdi, rdi_save);
__ movptr(rsi, rsi_save);
#else
__ ldmxcsr(mxcsr_save);
#endif
// restore rsp
__ addptr(rsp, -rsp_after_call_off * wordSize);
// return
__ vzeroupper();
__ pop(rbp);
__ ret(0);
// handle return types different from T_INT
__ BIND(is_long);
__ movq(Address(c_rarg0, 0), rax);
__ jmp(exit);
__ BIND(is_float);
__ movflt(Address(c_rarg0, 0), xmm0);
__ jmp(exit);
__ BIND(is_double);
__ movdbl(Address(c_rarg0, 0), xmm0);
__ jmp(exit);
return start;
}
// Return point for a Java call if there's an exception thrown in
// Java code. The exception is caught and transformed into a
// pending exception stored in JavaThread that can be tested from
// within the VM.
//
// Note: Usually the parameters are removed by the callee. In case
// of an exception crossing an activation frame boundary, that is
// not the case if the callee is compiled code => need to setup the
// rsp.
//
// rax: exception oop
address StubGenerator::generate_catch_exception() {
StubCodeMark mark(this, "StubRoutines", "catch_exception");
address start = __ pc();
// same as in generate_call_stub():
const Address rsp_after_call(rbp, rsp_after_call_off * wordSize);
const Address thread (rbp, thread_off * wordSize);
#ifdef ASSERT
// verify that threads correspond
{
Label L1, L2, L3;
__ cmpptr(r15_thread, thread);
__ jcc(Assembler::equal, L1);
__ stop("StubRoutines::catch_exception: r15_thread is corrupted");
__ bind(L1);
__ get_thread(rbx);
__ cmpptr(r15_thread, thread);
__ jcc(Assembler::equal, L2);
__ stop("StubRoutines::catch_exception: r15_thread is modified by call");
__ bind(L2);
__ cmpptr(r15_thread, rbx);
__ jcc(Assembler::equal, L3);
__ stop("StubRoutines::catch_exception: threads must correspond");
__ bind(L3);
}
#endif
// set pending exception
__ verify_oop(rax);
__ movptr(Address(r15_thread, Thread::pending_exception_offset()), rax);
__ lea(rscratch1, ExternalAddress((address)__FILE__));
__ movptr(Address(r15_thread, Thread::exception_file_offset()), rscratch1);
__ movl(Address(r15_thread, Thread::exception_line_offset()), (int) __LINE__);
// complete return to VM
assert(StubRoutines::_call_stub_return_address != nullptr,
"_call_stub_return_address must have been generated before");
__ jump(RuntimeAddress(StubRoutines::_call_stub_return_address));
return start;
}
// Continuation point for runtime calls returning with a pending
// exception. The pending exception check happened in the runtime
// or native call stub. The pending exception in Thread is
// converted into a Java-level exception.
//
// Contract with Java-level exception handlers:
// rax: exception
// rdx: throwing pc
//
// NOTE: At entry of this stub, exception-pc must be on stack !!
address StubGenerator::generate_forward_exception() {
StubCodeMark mark(this, "StubRoutines", "forward exception");
address start = __ pc();
// Upon entry, the sp points to the return address returning into
// Java (interpreted or compiled) code; i.e., the return address
// becomes the throwing pc.
//
// Arguments pushed before the runtime call are still on the stack
// but the exception handler will reset the stack pointer ->
// ignore them. A potential result in registers can be ignored as
// well.
#ifdef ASSERT
// make sure this code is only executed if there is a pending exception
{
Label L;
__ cmpptr(Address(r15_thread, Thread::pending_exception_offset()), NULL_WORD);
__ jcc(Assembler::notEqual, L);
__ stop("StubRoutines::forward exception: no pending exception (1)");
__ bind(L);
}
#endif
// compute exception handler into rbx
__ movptr(c_rarg0, Address(rsp, 0));
BLOCK_COMMENT("call exception_handler_for_return_address");
__ call_VM_leaf(CAST_FROM_FN_PTR(address,
SharedRuntime::exception_handler_for_return_address),
r15_thread, c_rarg0);
__ mov(rbx, rax);
// setup rax & rdx, remove return address & clear pending exception
__ pop(rdx);
__ movptr(rax, Address(r15_thread, Thread::pending_exception_offset()));
__ movptr(Address(r15_thread, Thread::pending_exception_offset()), NULL_WORD);
#ifdef ASSERT
// make sure exception is set
{
Label L;
__ testptr(rax, rax);
__ jcc(Assembler::notEqual, L);
__ stop("StubRoutines::forward exception: no pending exception (2)");
__ bind(L);
}
#endif
// continue at exception handler (return address removed)
// rax: exception
// rbx: exception handler
// rdx: throwing pc
__ verify_oop(rax);
__ jmp(rbx);
return start;
}
// Support for intptr_t OrderAccess::fence()
//
// Arguments :
//
// Result:
address StubGenerator::generate_orderaccess_fence() {
StubCodeMark mark(this, "StubRoutines", "orderaccess_fence");
address start = __ pc();
__ membar(Assembler::StoreLoad);
__ ret(0);
return start;
}
// Support for intptr_t get_previous_sp()
//
// This routine is used to find the previous stack pointer for the
// caller.
address StubGenerator::generate_get_previous_sp() {
StubCodeMark mark(this, "StubRoutines", "get_previous_sp");
address start = __ pc();
__ movptr(rax, rsp);
__ addptr(rax, 8); // return address is at the top of the stack.
__ ret(0);
return start;
}
//----------------------------------------------------------------------------------------------------
// Support for void verify_mxcsr()
//
// This routine is used with -Xcheck:jni to verify that native
// JNI code does not return to Java code without restoring the
// MXCSR register to our expected state.
address StubGenerator::generate_verify_mxcsr() {
StubCodeMark mark(this, "StubRoutines", "verify_mxcsr");
address start = __ pc();
const Address mxcsr_save(rsp, 0);
if (CheckJNICalls) {
Label ok_ret;
ExternalAddress mxcsr_std(StubRoutines::x86::addr_mxcsr_std());
__ push(rax);
__ subptr(rsp, wordSize); // allocate a temp location
__ stmxcsr(mxcsr_save);
__ movl(rax, mxcsr_save);
__ andl(rax, 0xFFC0); // Mask out any pending exceptions (only check control and mask bits)
__ cmp32(rax, mxcsr_std, rscratch1);
__ jcc(Assembler::equal, ok_ret);
__ warn("MXCSR changed by native JNI code, use -XX:+RestoreMXCSROnJNICall");
__ ldmxcsr(mxcsr_std, rscratch1);
__ bind(ok_ret);
__ addptr(rsp, wordSize);
__ pop(rax);
}
__ ret(0);
return start;
}
address StubGenerator::generate_f2i_fixup() {
StubCodeMark mark(this, "StubRoutines", "f2i_fixup");
Address inout(rsp, 5 * wordSize); // return address + 4 saves
address start = __ pc();
Label L;
__ push(rax);
__ push(c_rarg3);
__ push(c_rarg2);
__ push(c_rarg1);
__ movl(rax, 0x7f800000);
__ xorl(c_rarg3, c_rarg3);
__ movl(c_rarg2, inout);
__ movl(c_rarg1, c_rarg2);
__ andl(c_rarg1, 0x7fffffff);
__ cmpl(rax, c_rarg1); // NaN? -> 0
__ jcc(Assembler::negative, L);
__ testl(c_rarg2, c_rarg2); // signed ? min_jint : max_jint
__ movl(c_rarg3, 0x80000000);
__ movl(rax, 0x7fffffff);
__ cmovl(Assembler::positive, c_rarg3, rax);
__ bind(L);
__ movptr(inout, c_rarg3);
__ pop(c_rarg1);
__ pop(c_rarg2);
__ pop(c_rarg3);
__ pop(rax);
__ ret(0);
return start;
}
address StubGenerator::generate_f2l_fixup() {
StubCodeMark mark(this, "StubRoutines", "f2l_fixup");
Address inout(rsp, 5 * wordSize); // return address + 4 saves
address start = __ pc();
Label L;
__ push(rax);
__ push(c_rarg3);
__ push(c_rarg2);
__ push(c_rarg1);
__ movl(rax, 0x7f800000);
__ xorl(c_rarg3, c_rarg3);
__ movl(c_rarg2, inout);
__ movl(c_rarg1, c_rarg2);
__ andl(c_rarg1, 0x7fffffff);
__ cmpl(rax, c_rarg1); // NaN? -> 0
__ jcc(Assembler::negative, L);
__ testl(c_rarg2, c_rarg2); // signed ? min_jlong : max_jlong
__ mov64(c_rarg3, 0x8000000000000000);
__ mov64(rax, 0x7fffffffffffffff);
__ cmov(Assembler::positive, c_rarg3, rax);
__ bind(L);
__ movptr(inout, c_rarg3);
__ pop(c_rarg1);
__ pop(c_rarg2);
__ pop(c_rarg3);
__ pop(rax);
__ ret(0);
return start;
}
address StubGenerator::generate_d2i_fixup() {
StubCodeMark mark(this, "StubRoutines", "d2i_fixup");
Address inout(rsp, 6 * wordSize); // return address + 5 saves
address start = __ pc();
Label L;
__ push(rax);
__ push(c_rarg3);
__ push(c_rarg2);
__ push(c_rarg1);
__ push(c_rarg0);
__ movl(rax, 0x7ff00000);
__ movq(c_rarg2, inout);
__ movl(c_rarg3, c_rarg2);
__ mov(c_rarg1, c_rarg2);
__ mov(c_rarg0, c_rarg2);
__ negl(c_rarg3);
__ shrptr(c_rarg1, 0x20);
__ orl(c_rarg3, c_rarg2);
__ andl(c_rarg1, 0x7fffffff);
__ xorl(c_rarg2, c_rarg2);
__ shrl(c_rarg3, 0x1f);
__ orl(c_rarg1, c_rarg3);
__ cmpl(rax, c_rarg1);
__ jcc(Assembler::negative, L); // NaN -> 0
__ testptr(c_rarg0, c_rarg0); // signed ? min_jint : max_jint
__ movl(c_rarg2, 0x80000000);
__ movl(rax, 0x7fffffff);
__ cmov(Assembler::positive, c_rarg2, rax);
__ bind(L);
__ movptr(inout, c_rarg2);
__ pop(c_rarg0);
__ pop(c_rarg1);
__ pop(c_rarg2);
__ pop(c_rarg3);
__ pop(rax);
__ ret(0);
return start;
}
address StubGenerator::generate_d2l_fixup() {
StubCodeMark mark(this, "StubRoutines", "d2l_fixup");
Address inout(rsp, 6 * wordSize); // return address + 5 saves
address start = __ pc();
Label L;
__ push(rax);
__ push(c_rarg3);
__ push(c_rarg2);
__ push(c_rarg1);
__ push(c_rarg0);
__ movl(rax, 0x7ff00000);
__ movq(c_rarg2, inout);
__ movl(c_rarg3, c_rarg2);
__ mov(c_rarg1, c_rarg2);
__ mov(c_rarg0, c_rarg2);
__ negl(c_rarg3);
__ shrptr(c_rarg1, 0x20);
__ orl(c_rarg3, c_rarg2);
__ andl(c_rarg1, 0x7fffffff);
__ xorl(c_rarg2, c_rarg2);
__ shrl(c_rarg3, 0x1f);
__ orl(c_rarg1, c_rarg3);
__ cmpl(rax, c_rarg1);
__ jcc(Assembler::negative, L); // NaN -> 0
__ testq(c_rarg0, c_rarg0); // signed ? min_jlong : max_jlong
__ mov64(c_rarg2, 0x8000000000000000);
__ mov64(rax, 0x7fffffffffffffff);
__ cmovq(Assembler::positive, c_rarg2, rax);
__ bind(L);
__ movq(inout, c_rarg2);
__ pop(c_rarg0);
__ pop(c_rarg1);
__ pop(c_rarg2);
__ pop(c_rarg3);
__ pop(rax);
__ ret(0);
return start;
}
address StubGenerator::generate_count_leading_zeros_lut(const char *stub_name) {
__ align64();
StubCodeMark mark(this, "StubRoutines", stub_name);
address start = __ pc();
__ emit_data64(0x0101010102020304, relocInfo::none);
__ emit_data64(0x0000000000000000, relocInfo::none);
__ emit_data64(0x0101010102020304, relocInfo::none);
__ emit_data64(0x0000000000000000, relocInfo::none);
__ emit_data64(0x0101010102020304, relocInfo::none);
__ emit_data64(0x0000000000000000, relocInfo::none);
__ emit_data64(0x0101010102020304, relocInfo::none);
__ emit_data64(0x0000000000000000, relocInfo::none);
return start;
}
address StubGenerator::generate_popcount_avx_lut(const char *stub_name) {
__ align64();
StubCodeMark mark(this, "StubRoutines", stub_name);
address start = __ pc();
__ emit_data64(0x0302020102010100, relocInfo::none);
__ emit_data64(0x0403030203020201, relocInfo::none);
__ emit_data64(0x0302020102010100, relocInfo::none);
__ emit_data64(0x0403030203020201, relocInfo::none);
__ emit_data64(0x0302020102010100, relocInfo::none);
__ emit_data64(0x0403030203020201, relocInfo::none);
__ emit_data64(0x0302020102010100, relocInfo::none);
__ emit_data64(0x0403030203020201, relocInfo::none);
return start;
}
address StubGenerator::generate_iota_indices(const char *stub_name) {
__ align(CodeEntryAlignment);
StubCodeMark mark(this, "StubRoutines", stub_name);
address start = __ pc();
// B
__ emit_data64(0x0706050403020100, relocInfo::none);
__ emit_data64(0x0F0E0D0C0B0A0908, relocInfo::none);
__ emit_data64(0x1716151413121110, relocInfo::none);
__ emit_data64(0x1F1E1D1C1B1A1918, relocInfo::none);
__ emit_data64(0x2726252423222120, relocInfo::none);
__ emit_data64(0x2F2E2D2C2B2A2928, relocInfo::none);
__ emit_data64(0x3736353433323130, relocInfo::none);
__ emit_data64(0x3F3E3D3C3B3A3938, relocInfo::none);
// W
__ emit_data64(0x0003000200010000, relocInfo::none);
__ emit_data64(0x0007000600050004, relocInfo::none);
__ emit_data64(0x000B000A00090008, relocInfo::none);
__ emit_data64(0x000F000E000D000C, relocInfo::none);
__ emit_data64(0x0013001200110010, relocInfo::none);
__ emit_data64(0x0017001600150014, relocInfo::none);
__ emit_data64(0x001B001A00190018, relocInfo::none);
__ emit_data64(0x001F001E001D001C, relocInfo::none);
// D
__ emit_data64(0x0000000100000000, relocInfo::none);
__ emit_data64(0x0000000300000002, relocInfo::none);
__ emit_data64(0x0000000500000004, relocInfo::none);
__ emit_data64(0x0000000700000006, relocInfo::none);
__ emit_data64(0x0000000900000008, relocInfo::none);
__ emit_data64(0x0000000B0000000A, relocInfo::none);
__ emit_data64(0x0000000D0000000C, relocInfo::none);
__ emit_data64(0x0000000F0000000E, relocInfo::none);
// Q
__ emit_data64(0x0000000000000000, relocInfo::none);
__ emit_data64(0x0000000000000001, relocInfo::none);
__ emit_data64(0x0000000000000002, relocInfo::none);
__ emit_data64(0x0000000000000003, relocInfo::none);
__ emit_data64(0x0000000000000004, relocInfo::none);
__ emit_data64(0x0000000000000005, relocInfo::none);
__ emit_data64(0x0000000000000006, relocInfo::none);
__ emit_data64(0x0000000000000007, relocInfo::none);
// D - FP
__ emit_data64(0x3F80000000000000, relocInfo::none); // 0.0f, 1.0f
__ emit_data64(0x4040000040000000, relocInfo::none); // 2.0f, 3.0f
__ emit_data64(0x40A0000040800000, relocInfo::none); // 4.0f, 5.0f
__ emit_data64(0x40E0000040C00000, relocInfo::none); // 6.0f, 7.0f
__ emit_data64(0x4110000041000000, relocInfo::none); // 8.0f, 9.0f
__ emit_data64(0x4130000041200000, relocInfo::none); // 10.0f, 11.0f
__ emit_data64(0x4150000041400000, relocInfo::none); // 12.0f, 13.0f
__ emit_data64(0x4170000041600000, relocInfo::none); // 14.0f, 15.0f
// Q - FP
__ emit_data64(0x0000000000000000, relocInfo::none); // 0.0d
__ emit_data64(0x3FF0000000000000, relocInfo::none); // 1.0d
__ emit_data64(0x4000000000000000, relocInfo::none); // 2.0d
__ emit_data64(0x4008000000000000, relocInfo::none); // 3.0d
__ emit_data64(0x4010000000000000, relocInfo::none); // 4.0d
__ emit_data64(0x4014000000000000, relocInfo::none); // 5.0d
__ emit_data64(0x4018000000000000, relocInfo::none); // 6.0d
__ emit_data64(0x401c000000000000, relocInfo::none); // 7.0d
return start;
}
address StubGenerator::generate_vector_reverse_bit_lut(const char *stub_name) {
__ align(CodeEntryAlignment);
StubCodeMark mark(this, "StubRoutines", stub_name);
address start = __ pc();
__ emit_data64(0x0E060A020C040800, relocInfo::none);
__ emit_data64(0x0F070B030D050901, relocInfo::none);
__ emit_data64(0x0E060A020C040800, relocInfo::none);
__ emit_data64(0x0F070B030D050901, relocInfo::none);
__ emit_data64(0x0E060A020C040800, relocInfo::none);
__ emit_data64(0x0F070B030D050901, relocInfo::none);
__ emit_data64(0x0E060A020C040800, relocInfo::none);
__ emit_data64(0x0F070B030D050901, relocInfo::none);
return start;
}
address StubGenerator::generate_vector_reverse_byte_perm_mask_long(const char *stub_name) {
__ align(CodeEntryAlignment);
StubCodeMark mark(this, "StubRoutines", stub_name);
address start = __ pc();
__ emit_data64(0x0001020304050607, relocInfo::none);
__ emit_data64(0x08090A0B0C0D0E0F, relocInfo::none);
__ emit_data64(0x0001020304050607, relocInfo::none);
__ emit_data64(0x08090A0B0C0D0E0F, relocInfo::none);
__ emit_data64(0x0001020304050607, relocInfo::none);
__ emit_data64(0x08090A0B0C0D0E0F, relocInfo::none);
__ emit_data64(0x0001020304050607, relocInfo::none);
__ emit_data64(0x08090A0B0C0D0E0F, relocInfo::none);
return start;
}
address StubGenerator::generate_vector_reverse_byte_perm_mask_int(const char *stub_name) {
__ align(CodeEntryAlignment);
StubCodeMark mark(this, "StubRoutines", stub_name);
address start = __ pc();
__ emit_data64(0x0405060700010203, relocInfo::none);
__ emit_data64(0x0C0D0E0F08090A0B, relocInfo::none);
__ emit_data64(0x0405060700010203, relocInfo::none);
__ emit_data64(0x0C0D0E0F08090A0B, relocInfo::none);
__ emit_data64(0x0405060700010203, relocInfo::none);
__ emit_data64(0x0C0D0E0F08090A0B, relocInfo::none);
__ emit_data64(0x0405060700010203, relocInfo::none);
__ emit_data64(0x0C0D0E0F08090A0B, relocInfo::none);
return start;
}
address StubGenerator::generate_vector_reverse_byte_perm_mask_short(const char *stub_name) {
__ align(CodeEntryAlignment);
StubCodeMark mark(this, "StubRoutines", stub_name);
address start = __ pc();
__ emit_data64(0x0607040502030001, relocInfo::none);
__ emit_data64(0x0E0F0C0D0A0B0809, relocInfo::none);
__ emit_data64(0x0607040502030001, relocInfo::none);
__ emit_data64(0x0E0F0C0D0A0B0809, relocInfo::none);
__ emit_data64(0x0607040502030001, relocInfo::none);
__ emit_data64(0x0E0F0C0D0A0B0809, relocInfo::none);
__ emit_data64(0x0607040502030001, relocInfo::none);
__ emit_data64(0x0E0F0C0D0A0B0809, relocInfo::none);
return start;
}
address StubGenerator::generate_vector_byte_shuffle_mask(const char *stub_name) {
__ align(CodeEntryAlignment);
StubCodeMark mark(this, "StubRoutines", stub_name);
address start = __ pc();
__ emit_data64(0x7070707070707070, relocInfo::none);
__ emit_data64(0x7070707070707070, relocInfo::none);
__ emit_data64(0xF0F0F0F0F0F0F0F0, relocInfo::none);
__ emit_data64(0xF0F0F0F0F0F0F0F0, relocInfo::none);
return start;
}
address StubGenerator::generate_fp_mask(const char *stub_name, int64_t mask) {
__ align(CodeEntryAlignment);
StubCodeMark mark(this, "StubRoutines", stub_name);
address start = __ pc();
__ emit_data64( mask, relocInfo::none );
__ emit_data64( mask, relocInfo::none );
return start;
}
address StubGenerator::generate_compress_perm_table(const char *stub_name, int32_t esize) {
__ align(CodeEntryAlignment);
StubCodeMark mark(this, "StubRoutines", stub_name);
address start = __ pc();
if (esize == 32) {
// Loop to generate 256 x 8 int compression permute index table. A row is
// accessed using 8 bit index computed using vector mask. An entry in
// a row holds either a valid permute index corresponding to set bit position
// or a -1 (default) value.
for (int mask = 0; mask < 256; mask++) {
int ctr = 0;
for (int j = 0; j < 8; j++) {
if (mask & (1 << j)) {
__ emit_data(j, relocInfo::none);
ctr++;
}
}
for (; ctr < 8; ctr++) {
__ emit_data(-1, relocInfo::none);
}
}
} else {
assert(esize == 64, "");
// Loop to generate 16 x 4 long compression permute index table. A row is
// accessed using 4 bit index computed using vector mask. An entry in
// a row holds either a valid permute index pair for a quadword corresponding
// to set bit position or a -1 (default) value.
for (int mask = 0; mask < 16; mask++) {
int ctr = 0;
for (int j = 0; j < 4; j++) {
if (mask & (1 << j)) {
__ emit_data(2 * j, relocInfo::none);
__ emit_data(2 * j + 1, relocInfo::none);
ctr++;
}
}
for (; ctr < 4; ctr++) {
__ emit_data64(-1L, relocInfo::none);
}
}
}
return start;
}
address StubGenerator::generate_expand_perm_table(const char *stub_name, int32_t esize) {
__ align(CodeEntryAlignment);
StubCodeMark mark(this, "StubRoutines", stub_name);
address start = __ pc();
if (esize == 32) {
// Loop to generate 256 x 8 int expand permute index table. A row is accessed
// using 8 bit index computed using vector mask. An entry in a row holds either
// a valid permute index (starting from least significant lane) placed at poisition
// corresponding to set bit position or a -1 (default) value.
for (int mask = 0; mask < 256; mask++) {
int ctr = 0;
for (int j = 0; j < 8; j++) {
if (mask & (1 << j)) {
__ emit_data(ctr++, relocInfo::none);
} else {
__ emit_data(-1, relocInfo::none);
}
}
}
} else {
assert(esize == 64, "");
// Loop to generate 16 x 4 long expand permute index table. A row is accessed
// using 4 bit index computed using vector mask. An entry in a row holds either
// a valid doubleword permute index pair representing a quadword index (starting
// from least significant lane) placed at poisition corresponding to set bit
// position or a -1 (default) value.
for (int mask = 0; mask < 16; mask++) {
int ctr = 0;
for (int j = 0; j < 4; j++) {
if (mask & (1 << j)) {
__ emit_data(2 * ctr, relocInfo::none);
__ emit_data(2 * ctr + 1, relocInfo::none);
ctr++;
} else {
__ emit_data64(-1L, relocInfo::none);
}
}
}
}
return start;
}
address StubGenerator::generate_vector_mask(const char *stub_name, int64_t mask) {
__ align(CodeEntryAlignment);
StubCodeMark mark(this, "StubRoutines", stub_name);
address start = __ pc();
__ emit_data64(mask, relocInfo::none);
__ emit_data64(mask, relocInfo::none);
__ emit_data64(mask, relocInfo::none);
__ emit_data64(mask, relocInfo::none);
__ emit_data64(mask, relocInfo::none);
__ emit_data64(mask, relocInfo::none);
__ emit_data64(mask, relocInfo::none);
__ emit_data64(mask, relocInfo::none);
return start;
}
address StubGenerator::generate_vector_byte_perm_mask(const char *stub_name) {
__ align(CodeEntryAlignment);
StubCodeMark mark(this, "StubRoutines", stub_name);
address start = __ pc();
__ emit_data64(0x0000000000000001, relocInfo::none);
__ emit_data64(0x0000000000000003, relocInfo::none);
__ emit_data64(0x0000000000000005, relocInfo::none);
__ emit_data64(0x0000000000000007, relocInfo::none);
__ emit_data64(0x0000000000000000, relocInfo::none);
__ emit_data64(0x0000000000000002, relocInfo::none);
__ emit_data64(0x0000000000000004, relocInfo::none);
__ emit_data64(0x0000000000000006, relocInfo::none);
return start;
}
address StubGenerator::generate_vector_fp_mask(const char *stub_name, int64_t mask) {
__ align(CodeEntryAlignment);
StubCodeMark mark(this, "StubRoutines", stub_name);
address start = __ pc();
__ emit_data64(mask, relocInfo::none);
__ emit_data64(mask, relocInfo::none);
__ emit_data64(mask, relocInfo::none);
__ emit_data64(mask, relocInfo::none);
__ emit_data64(mask, relocInfo::none);
__ emit_data64(mask, relocInfo::none);
__ emit_data64(mask, relocInfo::none);
__ emit_data64(mask, relocInfo::none);
return start;
}
address StubGenerator::generate_vector_custom_i32(const char *stub_name, Assembler::AvxVectorLen len,
int32_t val0, int32_t val1, int32_t val2, int32_t val3,
int32_t val4, int32_t val5, int32_t val6, int32_t val7,
int32_t val8, int32_t val9, int32_t val10, int32_t val11,
int32_t val12, int32_t val13, int32_t val14, int32_t val15) {
__ align(CodeEntryAlignment);
StubCodeMark mark(this, "StubRoutines", stub_name);
address start = __ pc();
assert(len != Assembler::AVX_NoVec, "vector len must be specified");
__ emit_data(val0, relocInfo::none, 0);
__ emit_data(val1, relocInfo::none, 0);
__ emit_data(val2, relocInfo::none, 0);
__ emit_data(val3, relocInfo::none, 0);
if (len >= Assembler::AVX_256bit) {
__ emit_data(val4, relocInfo::none, 0);
__ emit_data(val5, relocInfo::none, 0);
__ emit_data(val6, relocInfo::none, 0);
__ emit_data(val7, relocInfo::none, 0);
if (len >= Assembler::AVX_512bit) {
__ emit_data(val8, relocInfo::none, 0);
__ emit_data(val9, relocInfo::none, 0);
__ emit_data(val10, relocInfo::none, 0);
__ emit_data(val11, relocInfo::none, 0);
__ emit_data(val12, relocInfo::none, 0);
__ emit_data(val13, relocInfo::none, 0);
__ emit_data(val14, relocInfo::none, 0);
__ emit_data(val15, relocInfo::none, 0);
}
}
return start;
}
// Non-destructive plausibility checks for oops
//
// Arguments:
// all args on stack!
//
// Stack after saving c_rarg3:
// [tos + 0]: saved c_rarg3
// [tos + 1]: saved c_rarg2
// [tos + 2]: saved r12 (several TemplateTable methods use it)
// [tos + 3]: saved flags
// [tos + 4]: return address
// * [tos + 5]: error message (char*)
// * [tos + 6]: object to verify (oop)
// * [tos + 7]: saved rax - saved by caller and bashed
// * [tos + 8]: saved r10 (rscratch1) - saved by caller
// * = popped on exit
address StubGenerator::generate_verify_oop() {
StubCodeMark mark(this, "StubRoutines", "verify_oop");
address start = __ pc();
Label exit, error;
__ pushf();
__ incrementl(ExternalAddress((address) StubRoutines::verify_oop_count_addr()), rscratch1);
__ push(r12);
// save c_rarg2 and c_rarg3
__ push(c_rarg2);
__ push(c_rarg3);
enum {
// After previous pushes.
oop_to_verify = 6 * wordSize,
saved_rax = 7 * wordSize,
saved_r10 = 8 * wordSize,
// Before the call to MacroAssembler::debug(), see below.
return_addr = 16 * wordSize,
error_msg = 17 * wordSize
};
// get object
__ movptr(rax, Address(rsp, oop_to_verify));
// make sure object is 'reasonable'
__ testptr(rax, rax);
__ jcc(Assembler::zero, exit); // if obj is null it is OK
BarrierSetAssembler* bs_asm = BarrierSet::barrier_set()->barrier_set_assembler();
bs_asm->check_oop(_masm, rax, c_rarg2, c_rarg3, error);
// return if everything seems ok
__ bind(exit);
__ movptr(rax, Address(rsp, saved_rax)); // get saved rax back
__ movptr(rscratch1, Address(rsp, saved_r10)); // get saved r10 back
__ pop(c_rarg3); // restore c_rarg3
__ pop(c_rarg2); // restore c_rarg2
__ pop(r12); // restore r12
__ popf(); // restore flags
__ ret(4 * wordSize); // pop caller saved stuff
// handle errors
__ bind(error);
__ movptr(rax, Address(rsp, saved_rax)); // get saved rax back
__ movptr(rscratch1, Address(rsp, saved_r10)); // get saved r10 back
__ pop(c_rarg3); // get saved c_rarg3 back
__ pop(c_rarg2); // get saved c_rarg2 back
__ pop(r12); // get saved r12 back
__ popf(); // get saved flags off stack --
// will be ignored
__ pusha(); // push registers
// (rip is already
// already pushed)
// debug(char* msg, int64_t pc, int64_t regs[])
// We've popped the registers we'd saved (c_rarg3, c_rarg2 and flags), and
// pushed all the registers, so now the stack looks like:
// [tos + 0] 16 saved registers
// [tos + 16] return address
// * [tos + 17] error message (char*)
// * [tos + 18] object to verify (oop)
// * [tos + 19] saved rax - saved by caller and bashed
// * [tos + 20] saved r10 (rscratch1) - saved by caller
// * = popped on exit
__ movptr(c_rarg0, Address(rsp, error_msg)); // pass address of error message
__ movptr(c_rarg1, Address(rsp, return_addr)); // pass return address
__ movq(c_rarg2, rsp); // pass address of regs on stack
__ mov(r12, rsp); // remember rsp
__ subptr(rsp, frame::arg_reg_save_area_bytes); // windows
__ andptr(rsp, -16); // align stack as required by ABI
BLOCK_COMMENT("call MacroAssembler::debug");
__ call(RuntimeAddress(CAST_FROM_FN_PTR(address, MacroAssembler::debug64)));
__ hlt();
return start;
}
// Shuffle first three arg regs on Windows into Linux/Solaris locations.
//
// Outputs:
// rdi - rcx
// rsi - rdx
// rdx - r8
// rcx - r9
//
// Registers r9 and r10 are used to save rdi and rsi on Windows, which latter
// are non-volatile. r9 and r10 should not be used by the caller.
//
void StubGenerator::setup_arg_regs(int nargs) {
const Register saved_rdi = r9;
const Register saved_rsi = r10;
assert(nargs == 3 || nargs == 4, "else fix");
#ifdef _WIN64
assert(c_rarg0 == rcx && c_rarg1 == rdx && c_rarg2 == r8 && c_rarg3 == r9,
"unexpected argument registers");
if (nargs == 4) {
__ mov(rax, r9); // r9 is also saved_rdi
}
__ movptr(saved_rdi, rdi);
__ movptr(saved_rsi, rsi);
__ mov(rdi, rcx); // c_rarg0
__ mov(rsi, rdx); // c_rarg1
__ mov(rdx, r8); // c_rarg2
if (nargs == 4) {
__ mov(rcx, rax); // c_rarg3 (via rax)
}
#else
assert(c_rarg0 == rdi && c_rarg1 == rsi && c_rarg2 == rdx && c_rarg3 == rcx,
"unexpected argument registers");
#endif
DEBUG_ONLY(_regs_in_thread = false;)
}
void StubGenerator::restore_arg_regs() {
assert(!_regs_in_thread, "wrong call to restore_arg_regs");
const Register saved_rdi = r9;
const Register saved_rsi = r10;
#ifdef _WIN64
__ movptr(rdi, saved_rdi);
__ movptr(rsi, saved_rsi);
#endif
}
// This is used in places where r10 is a scratch register, and can
// be adapted if r9 is needed also.
void StubGenerator::setup_arg_regs_using_thread(int nargs) {
const Register saved_r15 = r9;
assert(nargs == 3 || nargs == 4, "else fix");
#ifdef _WIN64
if (nargs == 4) {
__ mov(rax, r9); // r9 is also saved_r15
}
__ mov(saved_r15, r15); // r15 is callee saved and needs to be restored
__ get_thread(r15_thread);
assert(c_rarg0 == rcx && c_rarg1 == rdx && c_rarg2 == r8 && c_rarg3 == r9,
"unexpected argument registers");
__ movptr(Address(r15_thread, in_bytes(JavaThread::windows_saved_rdi_offset())), rdi);
__ movptr(Address(r15_thread, in_bytes(JavaThread::windows_saved_rsi_offset())), rsi);
__ mov(rdi, rcx); // c_rarg0
__ mov(rsi, rdx); // c_rarg1
__ mov(rdx, r8); // c_rarg2
if (nargs == 4) {
__ mov(rcx, rax); // c_rarg3 (via rax)
}
#else
assert(c_rarg0 == rdi && c_rarg1 == rsi && c_rarg2 == rdx && c_rarg3 == rcx,
"unexpected argument registers");
#endif
DEBUG_ONLY(_regs_in_thread = true;)
}
void StubGenerator::restore_arg_regs_using_thread() {
assert(_regs_in_thread, "wrong call to restore_arg_regs");
const Register saved_r15 = r9;
#ifdef _WIN64
__ get_thread(r15_thread);
__ movptr(rsi, Address(r15_thread, in_bytes(JavaThread::windows_saved_rsi_offset())));
__ movptr(rdi, Address(r15_thread, in_bytes(JavaThread::windows_saved_rdi_offset())));
__ mov(r15, saved_r15); // r15 is callee saved and needs to be restored
#endif
}
void StubGenerator::setup_argument_regs(BasicType type) {
if (type == T_BYTE || type == T_SHORT) {
setup_arg_regs(); // from => rdi, to => rsi, count => rdx
// r9 and r10 may be used to save non-volatile registers
} else {
setup_arg_regs_using_thread(); // from => rdi, to => rsi, count => rdx
// r9 is used to save r15_thread
}
}
void StubGenerator::restore_argument_regs(BasicType type) {
if (type == T_BYTE || type == T_SHORT) {
restore_arg_regs();
} else {
restore_arg_regs_using_thread();
}
}
address StubGenerator::generate_data_cache_writeback() {
const Register src = c_rarg0; // source address
__ align(CodeEntryAlignment);
StubCodeMark mark(this, "StubRoutines", "_data_cache_writeback");
address start = __ pc();
__ enter();
__ cache_wb(Address(src, 0));
__ leave();
__ ret(0);
return start;
}
address StubGenerator::generate_data_cache_writeback_sync() {
const Register is_pre = c_rarg0; // pre or post sync
__ align(CodeEntryAlignment);
StubCodeMark mark(this, "StubRoutines", "_data_cache_writeback_sync");
// pre wbsync is a no-op
// post wbsync translates to an sfence
Label skip;
address start = __ pc();
__ enter();
__ cmpl(is_pre, 0);
__ jcc(Assembler::notEqual, skip);
__ cache_wbsync(false);
__ bind(skip);
__ leave();
__ ret(0);
return start;
}
// ofs and limit are use for multi-block byte array.
// int com.sun.security.provider.MD5.implCompress(byte[] b, int ofs)
address StubGenerator::generate_md5_implCompress(bool multi_block, const char *name) {
__ align(CodeEntryAlignment);
StubCodeMark mark(this, "StubRoutines", name);
address start = __ pc();
const Register buf_param = r15;
const Address state_param(rsp, 0 * wordSize);
const Address ofs_param (rsp, 1 * wordSize );
const Address limit_param(rsp, 1 * wordSize + 4);
__ enter();
__ push(rbx);
__ push(rdi);
__ push(rsi);
__ push(r15);
__ subptr(rsp, 2 * wordSize);
__ movptr(buf_param, c_rarg0);
__ movptr(state_param, c_rarg1);
if (multi_block) {
__ movl(ofs_param, c_rarg2);
__ movl(limit_param, c_rarg3);
}
__ fast_md5(buf_param, state_param, ofs_param, limit_param, multi_block);
__ addptr(rsp, 2 * wordSize);
__ pop(r15);
__ pop(rsi);
__ pop(rdi);
__ pop(rbx);
__ leave();
__ ret(0);
return start;
}
address StubGenerator::generate_upper_word_mask() {
__ align64();
StubCodeMark mark(this, "StubRoutines", "upper_word_mask");
address start = __ pc();
__ emit_data64(0x0000000000000000, relocInfo::none);
__ emit_data64(0xFFFFFFFF00000000, relocInfo::none);
return start;
}
address StubGenerator::generate_shuffle_byte_flip_mask() {
__ align64();
StubCodeMark mark(this, "StubRoutines", "shuffle_byte_flip_mask");
address start = __ pc();
__ emit_data64(0x08090a0b0c0d0e0f, relocInfo::none);
__ emit_data64(0x0001020304050607, relocInfo::none);
return start;
}
// ofs and limit are use for multi-block byte array.
// int com.sun.security.provider.DigestBase.implCompressMultiBlock(byte[] b, int ofs, int limit)
address StubGenerator::generate_sha1_implCompress(bool multi_block, const char *name) {
__ align(CodeEntryAlignment);
StubCodeMark mark(this, "StubRoutines", name);
address start = __ pc();
Register buf = c_rarg0;
Register state = c_rarg1;
Register ofs = c_rarg2;
Register limit = c_rarg3;
const XMMRegister abcd = xmm0;
const XMMRegister e0 = xmm1;
const XMMRegister e1 = xmm2;
const XMMRegister msg0 = xmm3;
const XMMRegister msg1 = xmm4;
const XMMRegister msg2 = xmm5;
const XMMRegister msg3 = xmm6;
const XMMRegister shuf_mask = xmm7;
__ enter();
__ subptr(rsp, 4 * wordSize);
__ fast_sha1(abcd, e0, e1, msg0, msg1, msg2, msg3, shuf_mask,
buf, state, ofs, limit, rsp, multi_block);
__ addptr(rsp, 4 * wordSize);
__ leave();
__ ret(0);
return start;
}
address StubGenerator::generate_pshuffle_byte_flip_mask() {
__ align64();
StubCodeMark mark(this, "StubRoutines", "pshuffle_byte_flip_mask");
address start = __ pc();
__ emit_data64(0x0405060700010203, relocInfo::none);
__ emit_data64(0x0c0d0e0f08090a0b, relocInfo::none);
if (VM_Version::supports_avx2()) {
__ emit_data64(0x0405060700010203, relocInfo::none); // second copy
__ emit_data64(0x0c0d0e0f08090a0b, relocInfo::none);
// _SHUF_00BA
__ emit_data64(0x0b0a090803020100, relocInfo::none);
__ emit_data64(0xFFFFFFFFFFFFFFFF, relocInfo::none);
__ emit_data64(0x0b0a090803020100, relocInfo::none);
__ emit_data64(0xFFFFFFFFFFFFFFFF, relocInfo::none);
// _SHUF_DC00
__ emit_data64(0xFFFFFFFFFFFFFFFF, relocInfo::none);
__ emit_data64(0x0b0a090803020100, relocInfo::none);
__ emit_data64(0xFFFFFFFFFFFFFFFF, relocInfo::none);
__ emit_data64(0x0b0a090803020100, relocInfo::none);
}
return start;
}
//Mask for byte-swapping a couple of qwords in an XMM register using (v)pshufb.
address StubGenerator::generate_pshuffle_byte_flip_mask_sha512() {
__ align32();
StubCodeMark mark(this, "StubRoutines", "pshuffle_byte_flip_mask_sha512");
address start = __ pc();
if (VM_Version::supports_avx2()) {
__ emit_data64(0x0001020304050607, relocInfo::none); // PSHUFFLE_BYTE_FLIP_MASK
__ emit_data64(0x08090a0b0c0d0e0f, relocInfo::none);
__ emit_data64(0x1011121314151617, relocInfo::none);
__ emit_data64(0x18191a1b1c1d1e1f, relocInfo::none);
__ emit_data64(0x0000000000000000, relocInfo::none); //MASK_YMM_LO
__ emit_data64(0x0000000000000000, relocInfo::none);
__ emit_data64(0xFFFFFFFFFFFFFFFF, relocInfo::none);
__ emit_data64(0xFFFFFFFFFFFFFFFF, relocInfo::none);
}
return start;
}
// ofs and limit are use for multi-block byte array.
// int com.sun.security.provider.DigestBase.implCompressMultiBlock(byte[] b, int ofs, int limit)
address StubGenerator::generate_sha256_implCompress(bool multi_block, const char *name) {
assert(VM_Version::supports_sha() || VM_Version::supports_avx2(), "");
__ align(CodeEntryAlignment);
StubCodeMark mark(this, "StubRoutines", name);
address start = __ pc();
Register buf = c_rarg0;
Register state = c_rarg1;
Register ofs = c_rarg2;
Register limit = c_rarg3;
const XMMRegister msg = xmm0;
const XMMRegister state0 = xmm1;
const XMMRegister state1 = xmm2;
const XMMRegister msgtmp0 = xmm3;
const XMMRegister msgtmp1 = xmm4;
const XMMRegister msgtmp2 = xmm5;
const XMMRegister msgtmp3 = xmm6;
const XMMRegister msgtmp4 = xmm7;
const XMMRegister shuf_mask = xmm8;
__ enter();
__ subptr(rsp, 4 * wordSize);
if (VM_Version::supports_sha()) {
__ fast_sha256(msg, state0, state1, msgtmp0, msgtmp1, msgtmp2, msgtmp3, msgtmp4,
buf, state, ofs, limit, rsp, multi_block, shuf_mask);
} else if (VM_Version::supports_avx2()) {
__ sha256_AVX2(msg, state0, state1, msgtmp0, msgtmp1, msgtmp2, msgtmp3, msgtmp4,
buf, state, ofs, limit, rsp, multi_block, shuf_mask);
}
__ addptr(rsp, 4 * wordSize);
__ vzeroupper();
__ leave();
__ ret(0);
return start;
}
address StubGenerator::generate_sha512_implCompress(bool multi_block, const char *name) {
assert(VM_Version::supports_avx2(), "");
assert(VM_Version::supports_bmi2(), "");
__ align(CodeEntryAlignment);
StubCodeMark mark(this, "StubRoutines", name);
address start = __ pc();
Register buf = c_rarg0;
Register state = c_rarg1;
Register ofs = c_rarg2;
Register limit = c_rarg3;
const XMMRegister msg = xmm0;
const XMMRegister state0 = xmm1;
const XMMRegister state1 = xmm2;
const XMMRegister msgtmp0 = xmm3;
const XMMRegister msgtmp1 = xmm4;
const XMMRegister msgtmp2 = xmm5;
const XMMRegister msgtmp3 = xmm6;
const XMMRegister msgtmp4 = xmm7;
const XMMRegister shuf_mask = xmm8;
__ enter();
__ sha512_AVX2(msg, state0, state1, msgtmp0, msgtmp1, msgtmp2, msgtmp3, msgtmp4,
buf, state, ofs, limit, rsp, multi_block, shuf_mask);
__ vzeroupper();
__ leave();
__ ret(0);
return start;
}
address StubGenerator::base64_shuffle_addr() {
__ align64();
StubCodeMark mark(this, "StubRoutines", "shuffle_base64");
address start = __ pc();
assert(((unsigned long long)start & 0x3f) == 0,
"Alignment problem (0x%08llx)", (unsigned long long)start);
__ emit_data64(0x0405030401020001, relocInfo::none);
__ emit_data64(0x0a0b090a07080607, relocInfo::none);
__ emit_data64(0x10110f100d0e0c0d, relocInfo::none);
__ emit_data64(0x1617151613141213, relocInfo::none);
__ emit_data64(0x1c1d1b1c191a1819, relocInfo::none);
__ emit_data64(0x222321221f201e1f, relocInfo::none);
__ emit_data64(0x2829272825262425, relocInfo::none);
__ emit_data64(0x2e2f2d2e2b2c2a2b, relocInfo::none);
return start;
}
address StubGenerator::base64_avx2_shuffle_addr() {
__ align32();
StubCodeMark mark(this, "StubRoutines", "avx2_shuffle_base64");
address start = __ pc();
__ emit_data64(0x0809070805060405, relocInfo::none);
__ emit_data64(0x0e0f0d0e0b0c0a0b, relocInfo::none);
__ emit_data64(0x0405030401020001, relocInfo::none);
__ emit_data64(0x0a0b090a07080607, relocInfo::none);
return start;
}
address StubGenerator::base64_avx2_input_mask_addr() {
__ align32();
StubCodeMark mark(this, "StubRoutines", "avx2_input_mask_base64");
address start = __ pc();
__ emit_data64(0x8000000000000000, relocInfo::none);
__ emit_data64(0x8000000080000000, relocInfo::none);
__ emit_data64(0x8000000080000000, relocInfo::none);
__ emit_data64(0x8000000080000000, relocInfo::none);
return start;
}
address StubGenerator::base64_avx2_lut_addr() {
__ align32();
StubCodeMark mark(this, "StubRoutines", "avx2_lut_base64");
address start = __ pc();
__ emit_data64(0xfcfcfcfcfcfc4741, relocInfo::none);
__ emit_data64(0x0000f0edfcfcfcfc, relocInfo::none);
__ emit_data64(0xfcfcfcfcfcfc4741, relocInfo::none);
__ emit_data64(0x0000f0edfcfcfcfc, relocInfo::none);
// URL LUT
__ emit_data64(0xfcfcfcfcfcfc4741, relocInfo::none);
__ emit_data64(0x000020effcfcfcfc, relocInfo::none);
__ emit_data64(0xfcfcfcfcfcfc4741, relocInfo::none);
__ emit_data64(0x000020effcfcfcfc, relocInfo::none);
return start;
}
address StubGenerator::base64_encoding_table_addr() {
__ align64();
StubCodeMark mark(this, "StubRoutines", "encoding_table_base64");
address start = __ pc();
assert(((unsigned long long)start & 0x3f) == 0, "Alignment problem (0x%08llx)", (unsigned long long)start);
__ emit_data64(0x4847464544434241, relocInfo::none);
__ emit_data64(0x504f4e4d4c4b4a49, relocInfo::none);
__ emit_data64(0x5857565554535251, relocInfo::none);
__ emit_data64(0x6665646362615a59, relocInfo::none);
__ emit_data64(0x6e6d6c6b6a696867, relocInfo::none);
__ emit_data64(0x767574737271706f, relocInfo::none);
__ emit_data64(0x333231307a797877, relocInfo::none);
__ emit_data64(0x2f2b393837363534, relocInfo::none);
// URL table
__ emit_data64(0x4847464544434241, relocInfo::none);
__ emit_data64(0x504f4e4d4c4b4a49, relocInfo::none);
__ emit_data64(0x5857565554535251, relocInfo::none);
__ emit_data64(0x6665646362615a59, relocInfo::none);
__ emit_data64(0x6e6d6c6b6a696867, relocInfo::none);
__ emit_data64(0x767574737271706f, relocInfo::none);
__ emit_data64(0x333231307a797877, relocInfo::none);
__ emit_data64(0x5f2d393837363534, relocInfo::none);
return start;
}
// Code for generating Base64 encoding.
// Intrinsic function prototype in Base64.java:
// private void encodeBlock(byte[] src, int sp, int sl, byte[] dst, int dp,
// boolean isURL) {
address StubGenerator::generate_base64_encodeBlock()
{
__ align(CodeEntryAlignment);
StubCodeMark mark(this, "StubRoutines", "implEncode");
address start = __ pc();
__ enter();
// Save callee-saved registers before using them
__ push(r12);
__ push(r13);
__ push(r14);
__ push(r15);
// arguments
const Register source = c_rarg0; // Source Array
const Register start_offset = c_rarg1; // start offset
const Register end_offset = c_rarg2; // end offset
const Register dest = c_rarg3; // destination array
#ifndef _WIN64
const Register dp = c_rarg4; // Position for writing to dest array
const Register isURL = c_rarg5; // Base64 or URL character set
#else
const Address dp_mem(rbp, 6 * wordSize); // length is on stack on Win64
const Address isURL_mem(rbp, 7 * wordSize);
const Register isURL = r10; // pick the volatile windows register
const Register dp = r12;
__ movl(dp, dp_mem);
__ movl(isURL, isURL_mem);
#endif
const Register length = r14;
const Register encode_table = r13;
Label L_process3, L_exit, L_processdata, L_vbmiLoop, L_not512, L_32byteLoop;
// calculate length from offsets
__ movl(length, end_offset);
__ subl(length, start_offset);
__ jcc(Assembler::lessEqual, L_exit);
// Code for 512-bit VBMI encoding. Encodes 48 input bytes into 64
// output bytes. We read 64 input bytes and ignore the last 16, so be
// sure not to read past the end of the input buffer.
if (VM_Version::supports_avx512_vbmi()) {
__ cmpl(length, 64); // Do not overrun input buffer.
__ jcc(Assembler::below, L_not512);
__ shll(isURL, 6); // index into decode table based on isURL
__ lea(encode_table, ExternalAddress(StubRoutines::x86::base64_encoding_table_addr()));
__ addptr(encode_table, isURL);
__ shrl(isURL, 6); // restore isURL
__ mov64(rax, 0x3036242a1016040aull); // Shifts
__ evmovdquq(xmm3, ExternalAddress(StubRoutines::x86::base64_shuffle_addr()), Assembler::AVX_512bit, r15);
__ evmovdquq(xmm2, Address(encode_table, 0), Assembler::AVX_512bit);
__ evpbroadcastq(xmm1, rax, Assembler::AVX_512bit);
__ align32();
__ BIND(L_vbmiLoop);
__ vpermb(xmm0, xmm3, Address(source, start_offset), Assembler::AVX_512bit);
__ subl(length, 48);
// Put the input bytes into the proper lanes for writing, then
// encode them.
__ evpmultishiftqb(xmm0, xmm1, xmm0, Assembler::AVX_512bit);
__ vpermb(xmm0, xmm0, xmm2, Assembler::AVX_512bit);
// Write to destination
__ evmovdquq(Address(dest, dp), xmm0, Assembler::AVX_512bit);
__ addptr(dest, 64);
__ addptr(source, 48);
__ cmpl(length, 64);
__ jcc(Assembler::aboveEqual, L_vbmiLoop);
__ vzeroupper();
}
__ BIND(L_not512);
if (VM_Version::supports_avx2()) {
/*
** This AVX2 encoder is based off the paper at:
** https://dl.acm.org/doi/10.1145/3132709
**
** We use AVX2 SIMD instructions to encode 24 bytes into 32
** output bytes.
**
*/
// Lengths under 32 bytes are done with scalar routine
__ cmpl(length, 31);
__ jcc(Assembler::belowEqual, L_process3);
// Set up supporting constant table data
__ vmovdqu(xmm9, ExternalAddress(StubRoutines::x86::base64_avx2_shuffle_addr()), rax);
// 6-bit mask for 2nd and 4th (and multiples) 6-bit values
__ movl(rax, 0x0fc0fc00);
__ movdl(xmm8, rax);
__ vmovdqu(xmm1, ExternalAddress(StubRoutines::x86::base64_avx2_input_mask_addr()), rax);
__ vpbroadcastd(xmm8, xmm8, Assembler::AVX_256bit);
// Multiplication constant for "shifting" right by 6 and 10
// bits
__ movl(rax, 0x04000040);
__ subl(length, 24);
__ movdl(xmm7, rax);
__ vpbroadcastd(xmm7, xmm7, Assembler::AVX_256bit);
// For the first load, we mask off reading of the first 4
// bytes into the register. This is so we can get 4 3-byte
// chunks into each lane of the register, avoiding having to
// handle end conditions. We then shuffle these bytes into a
// specific order so that manipulation is easier.
//
// The initial read loads the XMM register like this:
//
// Lower 128-bit lane:
// +----+----+----+----+----+----+----+----+----+----+----+----+----+----+----+----+
// | XX | XX | XX | XX | A0 | A1 | A2 | B0 | B1 | B2 | C0 | C1
// | C2 | D0 | D1 | D2 |
// +----+----+----+----+----+----+----+----+----+----+----+----+----+----+----+----+
//
// Upper 128-bit lane:
// +----+----+----+----+----+----+----+----+----+----+----+----+----+----+----+----+
// | E0 | E1 | E2 | F0 | F1 | F2 | G0 | G1 | G2 | H0 | H1 | H2
// | XX | XX | XX | XX |
// +----+----+----+----+----+----+----+----+----+----+----+----+----+----+----+----+
//
// Where A0 is the first input byte, B0 is the fourth, etc.
// The alphabetical significance denotes the 3 bytes to be
// consumed and encoded into 4 bytes.
//
// We then shuffle the register so each 32-bit word contains
// the sequence:
// A1 A0 A2 A1, B1, B0, B2, B1, etc.
// Each of these byte sequences are then manipulated into 4
// 6-bit values ready for encoding.
//
// If we focus on one set of 3-byte chunks, changing the
// nomenclature such that A0 => a, A1 => b, and A2 => c, we
// shuffle such that each 24-bit chunk contains:
//
// b7 b6 b5 b4 b3 b2 b1 b0 | a7 a6 a5 a4 a3 a2 a1 a0 | c7 c6
// c5 c4 c3 c2 c1 c0 | b7 b6 b5 b4 b3 b2 b1 b0
// Explain this step.
// b3 b2 b1 b0 c5 c4 c3 c2 | c1 c0 d5 d4 d3 d2 d1 d0 | a5 a4
// a3 a2 a1 a0 b5 b4 | b3 b2 b1 b0 c5 c4 c3 c2
//
// W first and off all but bits 4-9 and 16-21 (c5..c0 and
// a5..a0) and shift them using a vector multiplication
// operation (vpmulhuw) which effectively shifts c right by 6
// bits and a right by 10 bits. We similarly mask bits 10-15
// (d5..d0) and 22-27 (b5..b0) and shift them left by 8 and 4
// bits respectively. This is done using vpmullw. We end up
// with 4 6-bit values, thus splitting the 3 input bytes,
// ready for encoding:
// 0 0 d5..d0 0 0 c5..c0 0 0 b5..b0 0 0 a5..a0
//
// For translation, we recognize that there are 5 distinct
// ranges of legal Base64 characters as below:
//
// +-------------+-------------+------------+
// | 6-bit value | ASCII range | offset |
// +-------------+-------------+------------+
// | 0..25 | A..Z | 65 |
// | 26..51 | a..z | 71 |
// | 52..61 | 0..9 | -4 |
// | 62 | + or - | -19 or -17 |
// | 63 | / or _ | -16 or 32 |
// +-------------+-------------+------------+
//
// We note that vpshufb does a parallel lookup in a
// destination register using the lower 4 bits of bytes from a
// source register. If we use a saturated subtraction and
// subtract 51 from each 6-bit value, bytes from [0,51]
// saturate to 0, and [52,63] map to a range of [1,12]. We
// distinguish the [0,25] and [26,51] ranges by assigning a
// value of 13 for all 6-bit values less than 26. We end up
// with:
//
// +-------------+-------------+------------+
// | 6-bit value | Reduced | offset |
// +-------------+-------------+------------+
// | 0..25 | 13 | 65 |
// | 26..51 | 0 | 71 |
// | 52..61 | 0..9 | -4 |
// | 62 | 11 | -19 or -17 |
// | 63 | 12 | -16 or 32 |
// +-------------+-------------+------------+
//
// We then use a final vpshufb to add the appropriate offset,
// translating the bytes.
//
// Load input bytes - only 28 bytes. Mask the first load to
// not load into the full register.
__ vpmaskmovd(xmm1, xmm1, Address(source, start_offset, Address::times_1, -4), Assembler::AVX_256bit);
// Move 3-byte chunks of input (12 bytes) into 16 bytes,
// ordering by:
// 1, 0, 2, 1; 4, 3, 5, 4; etc. This groups 6-bit chunks
// for easy masking
__ vpshufb(xmm1, xmm1, xmm9, Assembler::AVX_256bit);
__ addl(start_offset, 24);
// Load masking register for first and third (and multiples)
// 6-bit values.
__ movl(rax, 0x003f03f0);
__ movdl(xmm6, rax);
__ vpbroadcastd(xmm6, xmm6, Assembler::AVX_256bit);
// Multiplication constant for "shifting" left by 4 and 8 bits
__ movl(rax, 0x01000010);
__ movdl(xmm5, rax);
__ vpbroadcastd(xmm5, xmm5, Assembler::AVX_256bit);
// Isolate 6-bit chunks of interest
__ vpand(xmm0, xmm8, xmm1, Assembler::AVX_256bit);
// Load constants for encoding
__ movl(rax, 0x19191919);
__ movdl(xmm3, rax);
__ vpbroadcastd(xmm3, xmm3, Assembler::AVX_256bit);
__ movl(rax, 0x33333333);
__ movdl(xmm4, rax);
__ vpbroadcastd(xmm4, xmm4, Assembler::AVX_256bit);
// Shift output bytes 0 and 2 into proper lanes
__ vpmulhuw(xmm2, xmm0, xmm7, Assembler::AVX_256bit);
// Mask and shift output bytes 1 and 3 into proper lanes and
// combine
__ vpand(xmm0, xmm6, xmm1, Assembler::AVX_256bit);
__ vpmullw(xmm0, xmm5, xmm0, Assembler::AVX_256bit);
__ vpor(xmm0, xmm0, xmm2, Assembler::AVX_256bit);
// Find out which are 0..25. This indicates which input
// values fall in the range of 'A'-'Z', which require an
// additional offset (see comments above)
__ vpcmpgtb(xmm2, xmm0, xmm3, Assembler::AVX_256bit);
__ vpsubusb(xmm1, xmm0, xmm4, Assembler::AVX_256bit);
__ vpsubb(xmm1, xmm1, xmm2, Assembler::AVX_256bit);
// Load the proper lookup table
__ lea(r11, ExternalAddress(StubRoutines::x86::base64_avx2_lut_addr()));
__ movl(r15, isURL);
__ shll(r15, 5);
__ vmovdqu(xmm2, Address(r11, r15));
// Shuffle the offsets based on the range calculation done
// above. This allows us to add the correct offset to the
// 6-bit value corresponding to the range documented above.
__ vpshufb(xmm1, xmm2, xmm1, Assembler::AVX_256bit);
__ vpaddb(xmm0, xmm1, xmm0, Assembler::AVX_256bit);
// Store the encoded bytes
__ vmovdqu(Address(dest, dp), xmm0);
__ addl(dp, 32);
__ cmpl(length, 31);
__ jcc(Assembler::belowEqual, L_process3);
__ align32();
__ BIND(L_32byteLoop);
// Get next 32 bytes
__ vmovdqu(xmm1, Address(source, start_offset, Address::times_1, -4));
__ subl(length, 24);
__ addl(start_offset, 24);
// This logic is identical to the above, with only constant
// register loads removed. Shuffle the input, mask off 6-bit
// chunks, shift them into place, then add the offset to
// encode.
__ vpshufb(xmm1, xmm1, xmm9, Assembler::AVX_256bit);
__ vpand(xmm0, xmm8, xmm1, Assembler::AVX_256bit);
__ vpmulhuw(xmm10, xmm0, xmm7, Assembler::AVX_256bit);
__ vpand(xmm0, xmm6, xmm1, Assembler::AVX_256bit);
__ vpmullw(xmm0, xmm5, xmm0, Assembler::AVX_256bit);
__ vpor(xmm0, xmm0, xmm10, Assembler::AVX_256bit);
__ vpcmpgtb(xmm10, xmm0, xmm3, Assembler::AVX_256bit);
__ vpsubusb(xmm1, xmm0, xmm4, Assembler::AVX_256bit);
__ vpsubb(xmm1, xmm1, xmm10, Assembler::AVX_256bit);
__ vpshufb(xmm1, xmm2, xmm1, Assembler::AVX_256bit);
__ vpaddb(xmm0, xmm1, xmm0, Assembler::AVX_256bit);
// Store the encoded bytes
__ vmovdqu(Address(dest, dp), xmm0);
__ addl(dp, 32);
__ cmpl(length, 31);
__ jcc(Assembler::above, L_32byteLoop);
__ BIND(L_process3);
__ vzeroupper();
} else {
__ BIND(L_process3);
}
__ cmpl(length, 3);
__ jcc(Assembler::below, L_exit);
// Load the encoding table based on isURL
__ lea(r11, ExternalAddress(StubRoutines::x86::base64_encoding_table_addr()));
__ movl(r15, isURL);
__ shll(r15, 6);
__ addptr(r11, r15);
__ BIND(L_processdata);
// Load 3 bytes
__ load_unsigned_byte(r15, Address(source, start_offset));
__ load_unsigned_byte(r10, Address(source, start_offset, Address::times_1, 1));
__ load_unsigned_byte(r13, Address(source, start_offset, Address::times_1, 2));
// Build a 32-bit word with bytes 1, 2, 0, 1
__ movl(rax, r10);
__ shll(r10, 24);
__ orl(rax, r10);
__ subl(length, 3);
__ shll(r15, 8);
__ shll(r13, 16);
__ orl(rax, r15);
__ addl(start_offset, 3);
__ orl(rax, r13);
// At this point, rax contains | byte1 | byte2 | byte0 | byte1
// r13 has byte2 << 16 - need low-order 6 bits to translate.
// This translated byte is the fourth output byte.
__ shrl(r13, 16);
__ andl(r13, 0x3f);
// The high-order 6 bits of r15 (byte0) is translated.
// The translated byte is the first output byte.
__ shrl(r15, 10);
__ load_unsigned_byte(r13, Address(r11, r13));
__ load_unsigned_byte(r15, Address(r11, r15));
__ movb(Address(dest, dp, Address::times_1, 3), r13);
// Extract high-order 4 bits of byte1 and low-order 2 bits of byte0.
// This translated byte is the second output byte.
__ shrl(rax, 4);
__ movl(r10, rax);
__ andl(rax, 0x3f);
__ movb(Address(dest, dp, Address::times_1, 0), r15);
__ load_unsigned_byte(rax, Address(r11, rax));
// Extract low-order 2 bits of byte1 and high-order 4 bits of byte2.
// This translated byte is the third output byte.
__ shrl(r10, 18);
__ andl(r10, 0x3f);
__ load_unsigned_byte(r10, Address(r11, r10));
__ movb(Address(dest, dp, Address::times_1, 1), rax);
__ movb(Address(dest, dp, Address::times_1, 2), r10);
__ addl(dp, 4);
__ cmpl(length, 3);
__ jcc(Assembler::aboveEqual, L_processdata);
__ BIND(L_exit);
__ pop(r15);
__ pop(r14);
__ pop(r13);
__ pop(r12);
__ leave();
__ ret(0);
return start;
}
// base64 AVX512vbmi tables
address StubGenerator::base64_vbmi_lookup_lo_addr() {
__ align64();
StubCodeMark mark(this, "StubRoutines", "lookup_lo_base64");
address start = __ pc();
assert(((unsigned long long)start & 0x3f) == 0,
"Alignment problem (0x%08llx)", (unsigned long long)start);
__ emit_data64(0x8080808080808080, relocInfo::none);
__ emit_data64(0x8080808080808080, relocInfo::none);
__ emit_data64(0x8080808080808080, relocInfo::none);
__ emit_data64(0x8080808080808080, relocInfo::none);
__ emit_data64(0x8080808080808080, relocInfo::none);
__ emit_data64(0x3f8080803e808080, relocInfo::none);
__ emit_data64(0x3b3a393837363534, relocInfo::none);
__ emit_data64(0x8080808080803d3c, relocInfo::none);
return start;
}
address StubGenerator::base64_vbmi_lookup_hi_addr() {
__ align64();
StubCodeMark mark(this, "StubRoutines", "lookup_hi_base64");
address start = __ pc();
assert(((unsigned long long)start & 0x3f) == 0,
"Alignment problem (0x%08llx)", (unsigned long long)start);
__ emit_data64(0x0605040302010080, relocInfo::none);
__ emit_data64(0x0e0d0c0b0a090807, relocInfo::none);
__ emit_data64(0x161514131211100f, relocInfo::none);
__ emit_data64(0x8080808080191817, relocInfo::none);
__ emit_data64(0x201f1e1d1c1b1a80, relocInfo::none);
__ emit_data64(0x2827262524232221, relocInfo::none);
__ emit_data64(0x302f2e2d2c2b2a29, relocInfo::none);
__ emit_data64(0x8080808080333231, relocInfo::none);
return start;
}
address StubGenerator::base64_vbmi_lookup_lo_url_addr() {
__ align64();
StubCodeMark mark(this, "StubRoutines", "lookup_lo_base64url");
address start = __ pc();
assert(((unsigned long long)start & 0x3f) == 0,
"Alignment problem (0x%08llx)", (unsigned long long)start);
__ emit_data64(0x8080808080808080, relocInfo::none);
__ emit_data64(0x8080808080808080, relocInfo::none);
__ emit_data64(0x8080808080808080, relocInfo::none);
__ emit_data64(0x8080808080808080, relocInfo::none);
__ emit_data64(0x8080808080808080, relocInfo::none);
__ emit_data64(0x80803e8080808080, relocInfo::none);
__ emit_data64(0x3b3a393837363534, relocInfo::none);
__ emit_data64(0x8080808080803d3c, relocInfo::none);
return start;
}
address StubGenerator::base64_vbmi_lookup_hi_url_addr() {
__ align64();
StubCodeMark mark(this, "StubRoutines", "lookup_hi_base64url");
address start = __ pc();
assert(((unsigned long long)start & 0x3f) == 0,
"Alignment problem (0x%08llx)", (unsigned long long)start);
__ emit_data64(0x0605040302010080, relocInfo::none);
__ emit_data64(0x0e0d0c0b0a090807, relocInfo::none);
__ emit_data64(0x161514131211100f, relocInfo::none);
__ emit_data64(0x3f80808080191817, relocInfo::none);
__ emit_data64(0x201f1e1d1c1b1a80, relocInfo::none);
__ emit_data64(0x2827262524232221, relocInfo::none);
__ emit_data64(0x302f2e2d2c2b2a29, relocInfo::none);
__ emit_data64(0x8080808080333231, relocInfo::none);
return start;
}
address StubGenerator::base64_vbmi_pack_vec_addr() {
__ align64();
StubCodeMark mark(this, "StubRoutines", "pack_vec_base64");
address start = __ pc();
assert(((unsigned long long)start & 0x3f) == 0,
"Alignment problem (0x%08llx)", (unsigned long long)start);
__ emit_data64(0x090a040506000102, relocInfo::none);
__ emit_data64(0x161011120c0d0e08, relocInfo::none);
__ emit_data64(0x1c1d1e18191a1415, relocInfo::none);
__ emit_data64(0x292a242526202122, relocInfo::none);
__ emit_data64(0x363031322c2d2e28, relocInfo::none);
__ emit_data64(0x3c3d3e38393a3435, relocInfo::none);
__ emit_data64(0x0000000000000000, relocInfo::none);
__ emit_data64(0x0000000000000000, relocInfo::none);
return start;
}
address StubGenerator::base64_vbmi_join_0_1_addr() {
__ align64();
StubCodeMark mark(this, "StubRoutines", "join_0_1_base64");
address start = __ pc();
assert(((unsigned long long)start & 0x3f) == 0,
"Alignment problem (0x%08llx)", (unsigned long long)start);
__ emit_data64(0x090a040506000102, relocInfo::none);
__ emit_data64(0x161011120c0d0e08, relocInfo::none);
__ emit_data64(0x1c1d1e18191a1415, relocInfo::none);
__ emit_data64(0x292a242526202122, relocInfo::none);
__ emit_data64(0x363031322c2d2e28, relocInfo::none);
__ emit_data64(0x3c3d3e38393a3435, relocInfo::none);
__ emit_data64(0x494a444546404142, relocInfo::none);
__ emit_data64(0x565051524c4d4e48, relocInfo::none);
return start;
}
address StubGenerator::base64_vbmi_join_1_2_addr() {
__ align64();
StubCodeMark mark(this, "StubRoutines", "join_1_2_base64");
address start = __ pc();
assert(((unsigned long long)start & 0x3f) == 0,
"Alignment problem (0x%08llx)", (unsigned long long)start);
__ emit_data64(0x1c1d1e18191a1415, relocInfo::none);
__ emit_data64(0x292a242526202122, relocInfo::none);
__ emit_data64(0x363031322c2d2e28, relocInfo::none);
__ emit_data64(0x3c3d3e38393a3435, relocInfo::none);
__ emit_data64(0x494a444546404142, relocInfo::none);
__ emit_data64(0x565051524c4d4e48, relocInfo::none);
__ emit_data64(0x5c5d5e58595a5455, relocInfo::none);
__ emit_data64(0x696a646566606162, relocInfo::none);
return start;
}
address StubGenerator::base64_vbmi_join_2_3_addr() {
__ align64();
StubCodeMark mark(this, "StubRoutines", "join_2_3_base64");
address start = __ pc();
assert(((unsigned long long)start & 0x3f) == 0,
"Alignment problem (0x%08llx)", (unsigned long long)start);
__ emit_data64(0x363031322c2d2e28, relocInfo::none);
__ emit_data64(0x3c3d3e38393a3435, relocInfo::none);
__ emit_data64(0x494a444546404142, relocInfo::none);
__ emit_data64(0x565051524c4d4e48, relocInfo::none);
__ emit_data64(0x5c5d5e58595a5455, relocInfo::none);
__ emit_data64(0x696a646566606162, relocInfo::none);
__ emit_data64(0x767071726c6d6e68, relocInfo::none);
__ emit_data64(0x7c7d7e78797a7475, relocInfo::none);
return start;
}
address StubGenerator::base64_AVX2_decode_tables_addr() {
__ align64();
StubCodeMark mark(this, "StubRoutines", "AVX2_tables_base64");
address start = __ pc();
assert(((unsigned long long)start & 0x3f) == 0,
"Alignment problem (0x%08llx)", (unsigned long long)start);
__ emit_data(0x2f2f2f2f, relocInfo::none, 0);
__ emit_data(0x5f5f5f5f, relocInfo::none, 0); // for URL
__ emit_data(0xffffffff, relocInfo::none, 0);
__ emit_data(0xfcfcfcfc, relocInfo::none, 0); // for URL
// Permute table
__ emit_data64(0x0000000100000000, relocInfo::none);
__ emit_data64(0x0000000400000002, relocInfo::none);
__ emit_data64(0x0000000600000005, relocInfo::none);
__ emit_data64(0xffffffffffffffff, relocInfo::none);
// Shuffle table
__ emit_data64(0x090a040506000102, relocInfo::none);
__ emit_data64(0xffffffff0c0d0e08, relocInfo::none);
__ emit_data64(0x090a040506000102, relocInfo::none);
__ emit_data64(0xffffffff0c0d0e08, relocInfo::none);
// merge table
__ emit_data(0x01400140, relocInfo::none, 0);
// merge multiplier
__ emit_data(0x00011000, relocInfo::none, 0);
return start;
}
address StubGenerator::base64_AVX2_decode_LUT_tables_addr() {
__ align64();
StubCodeMark mark(this, "StubRoutines", "AVX2_tables_URL_base64");
address start = __ pc();
assert(((unsigned long long)start & 0x3f) == 0,
"Alignment problem (0x%08llx)", (unsigned long long)start);
// lut_lo
__ emit_data64(0x1111111111111115, relocInfo::none);
__ emit_data64(0x1a1b1b1b1a131111, relocInfo::none);
__ emit_data64(0x1111111111111115, relocInfo::none);
__ emit_data64(0x1a1b1b1b1a131111, relocInfo::none);
// lut_roll
__ emit_data64(0xb9b9bfbf04131000, relocInfo::none);
__ emit_data64(0x0000000000000000, relocInfo::none);
__ emit_data64(0xb9b9bfbf04131000, relocInfo::none);
__ emit_data64(0x0000000000000000, relocInfo::none);
// lut_lo URL
__ emit_data64(0x1111111111111115, relocInfo::none);
__ emit_data64(0x1b1b1a1b1b131111, relocInfo::none);
__ emit_data64(0x1111111111111115, relocInfo::none);
__ emit_data64(0x1b1b1a1b1b131111, relocInfo::none);
// lut_roll URL
__ emit_data64(0xb9b9bfbf0411e000, relocInfo::none);
__ emit_data64(0x0000000000000000, relocInfo::none);
__ emit_data64(0xb9b9bfbf0411e000, relocInfo::none);
__ emit_data64(0x0000000000000000, relocInfo::none);
// lut_hi
__ emit_data64(0x0804080402011010, relocInfo::none);
__ emit_data64(0x1010101010101010, relocInfo::none);
__ emit_data64(0x0804080402011010, relocInfo::none);
__ emit_data64(0x1010101010101010, relocInfo::none);
return start;
}
address StubGenerator::base64_decoding_table_addr() {
StubCodeMark mark(this, "StubRoutines", "decoding_table_base64");
address start = __ pc();
__ emit_data64(0xffffffffffffffff, relocInfo::none);
__ emit_data64(0xffffffffffffffff, relocInfo::none);
__ emit_data64(0xffffffffffffffff, relocInfo::none);
__ emit_data64(0xffffffffffffffff, relocInfo::none);
__ emit_data64(0xffffffffffffffff, relocInfo::none);
__ emit_data64(0x3fffffff3effffff, relocInfo::none);
__ emit_data64(0x3b3a393837363534, relocInfo::none);
__ emit_data64(0xffffffffffff3d3c, relocInfo::none);
__ emit_data64(0x06050403020100ff, relocInfo::none);
__ emit_data64(0x0e0d0c0b0a090807, relocInfo::none);
__ emit_data64(0x161514131211100f, relocInfo::none);
__ emit_data64(0xffffffffff191817, relocInfo::none);
__ emit_data64(0x201f1e1d1c1b1aff, relocInfo::none);
__ emit_data64(0x2827262524232221, relocInfo::none);
__ emit_data64(0x302f2e2d2c2b2a29, relocInfo::none);
__ emit_data64(0xffffffffff333231, relocInfo::none);
__ emit_data64(0xffffffffffffffff, relocInfo::none);
__ emit_data64(0xffffffffffffffff, relocInfo::none);
__ emit_data64(0xffffffffffffffff, relocInfo::none);
__ emit_data64(0xffffffffffffffff, relocInfo::none);
__ emit_data64(0xffffffffffffffff, relocInfo::none);
__ emit_data64(0xffffffffffffffff, relocInfo::none);
__ emit_data64(0xffffffffffffffff, relocInfo::none);
__ emit_data64(0xffffffffffffffff, relocInfo::none);
__ emit_data64(0xffffffffffffffff, relocInfo::none);
__ emit_data64(0xffffffffffffffff, relocInfo::none);
__ emit_data64(0xffffffffffffffff, relocInfo::none);
__ emit_data64(0xffffffffffffffff, relocInfo::none);
__ emit_data64(0xffffffffffffffff, relocInfo::none);
__ emit_data64(0xffffffffffffffff, relocInfo::none);
__ emit_data64(0xffffffffffffffff, relocInfo::none);
__ emit_data64(0xffffffffffffffff, relocInfo::none);
// URL table
__ emit_data64(0xffffffffffffffff, relocInfo::none);
__ emit_data64(0xffffffffffffffff, relocInfo::none);
__ emit_data64(0xffffffffffffffff, relocInfo::none);
__ emit_data64(0xffffffffffffffff, relocInfo::none);
__ emit_data64(0xffffffffffffffff, relocInfo::none);
__ emit_data64(0xffff3effffffffff, relocInfo::none);
__ emit_data64(0x3b3a393837363534, relocInfo::none);
__ emit_data64(0xffffffffffff3d3c, relocInfo::none);
__ emit_data64(0x06050403020100ff, relocInfo::none);
__ emit_data64(0x0e0d0c0b0a090807, relocInfo::none);
__ emit_data64(0x161514131211100f, relocInfo::none);
__ emit_data64(0x3fffffffff191817, relocInfo::none);
__ emit_data64(0x201f1e1d1c1b1aff, relocInfo::none);
__ emit_data64(0x2827262524232221, relocInfo::none);
__ emit_data64(0x302f2e2d2c2b2a29, relocInfo::none);
__ emit_data64(0xffffffffff333231, relocInfo::none);
__ emit_data64(0xffffffffffffffff, relocInfo::none);
__ emit_data64(0xffffffffffffffff, relocInfo::none);
__ emit_data64(0xffffffffffffffff, relocInfo::none);
__ emit_data64(0xffffffffffffffff, relocInfo::none);
__ emit_data64(0xffffffffffffffff, relocInfo::none);
__ emit_data64(0xffffffffffffffff, relocInfo::none);
__ emit_data64(0xffffffffffffffff, relocInfo::none);
__ emit_data64(0xffffffffffffffff, relocInfo::none);
__ emit_data64(0xffffffffffffffff, relocInfo::none);
__ emit_data64(0xffffffffffffffff, relocInfo::none);
__ emit_data64(0xffffffffffffffff, relocInfo::none);
__ emit_data64(0xffffffffffffffff, relocInfo::none);
__ emit_data64(0xffffffffffffffff, relocInfo::none);
__ emit_data64(0xffffffffffffffff, relocInfo::none);
__ emit_data64(0xffffffffffffffff, relocInfo::none);
__ emit_data64(0xffffffffffffffff, relocInfo::none);
return start;
}
// Code for generating Base64 decoding.
//
// Based on the article (and associated code) from https://arxiv.org/abs/1910.05109.
//
// Intrinsic function prototype in Base64.java:
// private void decodeBlock(byte[] src, int sp, int sl, byte[] dst, int dp, boolean isURL, isMIME) {
address StubGenerator::generate_base64_decodeBlock() {
__ align(CodeEntryAlignment);
StubCodeMark mark(this, "StubRoutines", "implDecode");
address start = __ pc();
__ enter();
// Save callee-saved registers before using them
__ push(r12);
__ push(r13);
__ push(r14);
__ push(r15);
__ push(rbx);
// arguments
const Register source = c_rarg0; // Source Array
const Register start_offset = c_rarg1; // start offset
const Register end_offset = c_rarg2; // end offset
const Register dest = c_rarg3; // destination array
const Register isMIME = rbx;
#ifndef _WIN64
const Register dp = c_rarg4; // Position for writing to dest array
const Register isURL = c_rarg5;// Base64 or URL character set
__ movl(isMIME, Address(rbp, 2 * wordSize));
#else
const Address dp_mem(rbp, 6 * wordSize); // length is on stack on Win64
const Address isURL_mem(rbp, 7 * wordSize);
const Register isURL = r10; // pick the volatile windows register
const Register dp = r12;
__ movl(dp, dp_mem);
__ movl(isURL, isURL_mem);
__ movl(isMIME, Address(rbp, 8 * wordSize));
#endif
const XMMRegister lookup_lo = xmm5;
const XMMRegister lookup_hi = xmm6;
const XMMRegister errorvec = xmm7;
const XMMRegister pack16_op = xmm9;
const XMMRegister pack32_op = xmm8;
const XMMRegister input0 = xmm3;
const XMMRegister input1 = xmm20;
const XMMRegister input2 = xmm21;
const XMMRegister input3 = xmm19;
const XMMRegister join01 = xmm12;
const XMMRegister join12 = xmm11;
const XMMRegister join23 = xmm10;
const XMMRegister translated0 = xmm2;
const XMMRegister translated1 = xmm1;
const XMMRegister translated2 = xmm0;
const XMMRegister translated3 = xmm4;
const XMMRegister merged0 = xmm2;
const XMMRegister merged1 = xmm1;
const XMMRegister merged2 = xmm0;
const XMMRegister merged3 = xmm4;
const XMMRegister merge_ab_bc0 = xmm2;
const XMMRegister merge_ab_bc1 = xmm1;
const XMMRegister merge_ab_bc2 = xmm0;
const XMMRegister merge_ab_bc3 = xmm4;
const XMMRegister pack24bits = xmm4;
const Register length = r14;
const Register output_size = r13;
const Register output_mask = r15;
const KRegister input_mask = k1;
const XMMRegister input_initial_valid_b64 = xmm0;
const XMMRegister tmp = xmm10;
const XMMRegister mask = xmm0;
const XMMRegister invalid_b64 = xmm1;
Label L_process256, L_process64, L_process64Loop, L_exit, L_processdata, L_loadURL;
Label L_continue, L_finalBit, L_padding, L_donePadding, L_bruteForce;
Label L_forceLoop, L_bottomLoop, L_checkMIME, L_exit_no_vzero, L_lastChunk;
// calculate length from offsets
__ movl(length, end_offset);
__ subl(length, start_offset);
__ push(dest); // Save for return value calc
// If AVX512 VBMI not supported, just compile non-AVX code
if(VM_Version::supports_avx512_vbmi() &&
VM_Version::supports_avx512bw()) {
__ cmpl(length, 31); // 32-bytes is break-even for AVX-512
__ jcc(Assembler::lessEqual, L_lastChunk);
__ cmpl(isMIME, 0);
__ jcc(Assembler::notEqual, L_lastChunk);
// Load lookup tables based on isURL
__ cmpl(isURL, 0);
__ jcc(Assembler::notZero, L_loadURL);
__ evmovdquq(lookup_lo, ExternalAddress(StubRoutines::x86::base64_vbmi_lookup_lo_addr()), Assembler::AVX_512bit, r13);
__ evmovdquq(lookup_hi, ExternalAddress(StubRoutines::x86::base64_vbmi_lookup_hi_addr()), Assembler::AVX_512bit, r13);
__ BIND(L_continue);
__ movl(r15, 0x01400140);
__ evpbroadcastd(pack16_op, r15, Assembler::AVX_512bit);
__ movl(r15, 0x00011000);
__ evpbroadcastd(pack32_op, r15, Assembler::AVX_512bit);
__ cmpl(length, 0xff);
__ jcc(Assembler::lessEqual, L_process64);
// load masks required for decoding data
__ BIND(L_processdata);
__ evmovdquq(join01, ExternalAddress(StubRoutines::x86::base64_vbmi_join_0_1_addr()), Assembler::AVX_512bit,r13);
__ evmovdquq(join12, ExternalAddress(StubRoutines::x86::base64_vbmi_join_1_2_addr()), Assembler::AVX_512bit, r13);
__ evmovdquq(join23, ExternalAddress(StubRoutines::x86::base64_vbmi_join_2_3_addr()), Assembler::AVX_512bit, r13);
__ align32();
__ BIND(L_process256);
// Grab input data
__ evmovdquq(input0, Address(source, start_offset, Address::times_1, 0x00), Assembler::AVX_512bit);
__ evmovdquq(input1, Address(source, start_offset, Address::times_1, 0x40), Assembler::AVX_512bit);
__ evmovdquq(input2, Address(source, start_offset, Address::times_1, 0x80), Assembler::AVX_512bit);
__ evmovdquq(input3, Address(source, start_offset, Address::times_1, 0xc0), Assembler::AVX_512bit);
// Copy the low part of the lookup table into the destination of the permutation
__ evmovdquq(translated0, lookup_lo, Assembler::AVX_512bit);
__ evmovdquq(translated1, lookup_lo, Assembler::AVX_512bit);
__ evmovdquq(translated2, lookup_lo, Assembler::AVX_512bit);
__ evmovdquq(translated3, lookup_lo, Assembler::AVX_512bit);
// Translate the base64 input into "decoded" bytes
__ evpermt2b(translated0, input0, lookup_hi, Assembler::AVX_512bit);
__ evpermt2b(translated1, input1, lookup_hi, Assembler::AVX_512bit);
__ evpermt2b(translated2, input2, lookup_hi, Assembler::AVX_512bit);
__ evpermt2b(translated3, input3, lookup_hi, Assembler::AVX_512bit);
// OR all of the translations together to check for errors (high-order bit of byte set)
__ vpternlogd(input0, 0xfe, input1, input2, Assembler::AVX_512bit);
__ vpternlogd(input3, 0xfe, translated0, translated1, Assembler::AVX_512bit);
__ vpternlogd(input0, 0xfe, translated2, translated3, Assembler::AVX_512bit);
__ vpor(errorvec, input3, input0, Assembler::AVX_512bit);
// Check if there was an error - if so, try 64-byte chunks
__ evpmovb2m(k3, errorvec, Assembler::AVX_512bit);
__ kortestql(k3, k3);
__ jcc(Assembler::notZero, L_process64);
// The merging and shuffling happens here
// We multiply each byte pair [00dddddd | 00cccccc | 00bbbbbb | 00aaaaaa]
// Multiply [00cccccc] by 2^6 added to [00dddddd] to get [0000cccc | ccdddddd]
// The pack16_op is a vector of 0x01400140, so multiply D by 1 and C by 0x40
__ vpmaddubsw(merge_ab_bc0, translated0, pack16_op, Assembler::AVX_512bit);
__ vpmaddubsw(merge_ab_bc1, translated1, pack16_op, Assembler::AVX_512bit);
__ vpmaddubsw(merge_ab_bc2, translated2, pack16_op, Assembler::AVX_512bit);
__ vpmaddubsw(merge_ab_bc3, translated3, pack16_op, Assembler::AVX_512bit);
// Now do the same with packed 16-bit values.
// We start with [0000cccc | ccdddddd | 0000aaaa | aabbbbbb]
// pack32_op is 0x00011000 (2^12, 1), so this multiplies [0000aaaa | aabbbbbb] by 2^12
// and adds [0000cccc | ccdddddd] to yield [00000000 | aaaaaabb | bbbbcccc | ccdddddd]
__ vpmaddwd(merged0, merge_ab_bc0, pack32_op, Assembler::AVX_512bit);
__ vpmaddwd(merged1, merge_ab_bc1, pack32_op, Assembler::AVX_512bit);
__ vpmaddwd(merged2, merge_ab_bc2, pack32_op, Assembler::AVX_512bit);
__ vpmaddwd(merged3, merge_ab_bc3, pack32_op, Assembler::AVX_512bit);
// The join vectors specify which byte from which vector goes into the outputs
// One of every 4 bytes in the extended vector is zero, so we pack them into their
// final positions in the register for storing (256 bytes in, 192 bytes out)
__ evpermt2b(merged0, join01, merged1, Assembler::AVX_512bit);
__ evpermt2b(merged1, join12, merged2, Assembler::AVX_512bit);
__ evpermt2b(merged2, join23, merged3, Assembler::AVX_512bit);
// Store result
__ evmovdquq(Address(dest, dp, Address::times_1, 0x00), merged0, Assembler::AVX_512bit);
__ evmovdquq(Address(dest, dp, Address::times_1, 0x40), merged1, Assembler::AVX_512bit);
__ evmovdquq(Address(dest, dp, Address::times_1, 0x80), merged2, Assembler::AVX_512bit);
__ addptr(source, 0x100);
__ addptr(dest, 0xc0);
__ subl(length, 0x100);
__ cmpl(length, 64 * 4);
__ jcc(Assembler::greaterEqual, L_process256);
// At this point, we've decoded 64 * 4 * n bytes.
// The remaining length will be <= 64 * 4 - 1.
// UNLESS there was an error decoding the first 256-byte chunk. In this
// case, the length will be arbitrarily long.
//
// Note that this will be the path for MIME-encoded strings.
__ BIND(L_process64);
__ evmovdquq(pack24bits, ExternalAddress(StubRoutines::x86::base64_vbmi_pack_vec_addr()), Assembler::AVX_512bit, r13);
__ cmpl(length, 63);
__ jcc(Assembler::lessEqual, L_finalBit);
__ mov64(rax, 0x0000ffffffffffff);
__ kmovql(k2, rax);
__ align32();
__ BIND(L_process64Loop);
// Handle first 64-byte block
__ evmovdquq(input0, Address(source, start_offset), Assembler::AVX_512bit);
__ evmovdquq(translated0, lookup_lo, Assembler::AVX_512bit);
__ evpermt2b(translated0, input0, lookup_hi, Assembler::AVX_512bit);
__ vpor(errorvec, translated0, input0, Assembler::AVX_512bit);
// Check for error and bomb out before updating dest
__ evpmovb2m(k3, errorvec, Assembler::AVX_512bit);
__ kortestql(k3, k3);
__ jcc(Assembler::notZero, L_exit);
// Pack output register, selecting correct byte ordering
__ vpmaddubsw(merge_ab_bc0, translated0, pack16_op, Assembler::AVX_512bit);
__ vpmaddwd(merged0, merge_ab_bc0, pack32_op, Assembler::AVX_512bit);
__ vpermb(merged0, pack24bits, merged0, Assembler::AVX_512bit);
__ evmovdqub(Address(dest, dp), k2, merged0, true, Assembler::AVX_512bit);
__ subl(length, 64);
__ addptr(source, 64);
__ addptr(dest, 48);
__ cmpl(length, 64);
__ jcc(Assembler::greaterEqual, L_process64Loop);
__ cmpl(length, 0);
__ jcc(Assembler::lessEqual, L_exit);
__ BIND(L_finalBit);
// Now have 1 to 63 bytes left to decode
// I was going to let Java take care of the final fragment
// however it will repeatedly call this routine for every 4 bytes
// of input data, so handle the rest here.
__ movq(rax, -1);
__ bzhiq(rax, rax, length); // Input mask in rax
__ movl(output_size, length);
__ shrl(output_size, 2); // Find (len / 4) * 3 (output length)
__ lea(output_size, Address(output_size, output_size, Address::times_2, 0));
// output_size in r13
// Strip pad characters, if any, and adjust length and mask
__ addq(length, start_offset);
__ cmpb(Address(source, length, Address::times_1, -1), '=');
__ jcc(Assembler::equal, L_padding);
__ BIND(L_donePadding);
__ subq(length, start_offset);
// Output size is (64 - output_size), output mask is (all 1s >> output_size).
__ kmovql(input_mask, rax);
__ movq(output_mask, -1);
__ bzhiq(output_mask, output_mask, output_size);
// Load initial input with all valid base64 characters. Will be used
// in merging source bytes to avoid masking when determining if an error occurred.
__ movl(rax, 0x61616161);
__ evpbroadcastd(input_initial_valid_b64, rax, Assembler::AVX_512bit);
// A register containing all invalid base64 decoded values
__ movl(rax, 0x80808080);
__ evpbroadcastd(invalid_b64, rax, Assembler::AVX_512bit);
// input_mask is in k1
// output_size is in r13
// output_mask is in r15
// zmm0 - free
// zmm1 - 0x00011000
// zmm2 - 0x01400140
// zmm3 - errorvec
// zmm4 - pack vector
// zmm5 - lookup_lo
// zmm6 - lookup_hi
// zmm7 - errorvec
// zmm8 - 0x61616161
// zmm9 - 0x80808080
// Load only the bytes from source, merging into our "fully-valid" register
__ evmovdqub(input_initial_valid_b64, input_mask, Address(source, start_offset, Address::times_1, 0x0), true, Assembler::AVX_512bit);
// Decode all bytes within our merged input
__ evmovdquq(tmp, lookup_lo, Assembler::AVX_512bit);
__ evpermt2b(tmp, input_initial_valid_b64, lookup_hi, Assembler::AVX_512bit);
__ evporq(mask, tmp, input_initial_valid_b64, Assembler::AVX_512bit);
// Check for error. Compare (decoded | initial) to all invalid.
// If any bytes have their high-order bit set, then we have an error.
__ evptestmb(k2, mask, invalid_b64, Assembler::AVX_512bit);
__ kortestql(k2, k2);
// If we have an error, use the brute force loop to decode what we can (4-byte chunks).
__ jcc(Assembler::notZero, L_bruteForce);
// Shuffle output bytes
__ vpmaddubsw(tmp, tmp, pack16_op, Assembler::AVX_512bit);
__ vpmaddwd(tmp, tmp, pack32_op, Assembler::AVX_512bit);
__ vpermb(tmp, pack24bits, tmp, Assembler::AVX_512bit);
__ kmovql(k1, output_mask);
__ evmovdqub(Address(dest, dp), k1, tmp, true, Assembler::AVX_512bit);
__ addptr(dest, output_size);
__ BIND(L_exit);
__ vzeroupper();
__ pop(rax); // Get original dest value
__ subptr(dest, rax); // Number of bytes converted
__ movptr(rax, dest);
__ pop(rbx);
__ pop(r15);
__ pop(r14);
__ pop(r13);
__ pop(r12);
__ leave();
__ ret(0);
__ BIND(L_loadURL);
__ evmovdquq(lookup_lo, ExternalAddress(StubRoutines::x86::base64_vbmi_lookup_lo_url_addr()), Assembler::AVX_512bit, r13);
__ evmovdquq(lookup_hi, ExternalAddress(StubRoutines::x86::base64_vbmi_lookup_hi_url_addr()), Assembler::AVX_512bit, r13);
__ jmp(L_continue);
__ BIND(L_padding);
__ decrementq(output_size, 1);
__ shrq(rax, 1);
__ cmpb(Address(source, length, Address::times_1, -2), '=');
__ jcc(Assembler::notEqual, L_donePadding);
__ decrementq(output_size, 1);
__ shrq(rax, 1);
__ jmp(L_donePadding);
__ align32();
__ BIND(L_bruteForce);
} // End of if(avx512_vbmi)
if (VM_Version::supports_avx2()) {
Label L_tailProc, L_topLoop, L_enterLoop;
__ cmpl(isMIME, 0);
__ jcc(Assembler::notEqual, L_lastChunk);
// Check for buffer too small (for algorithm)
__ subl(length, 0x2c);
__ jcc(Assembler::less, L_tailProc);
__ shll(isURL, 2);
// Algorithm adapted from https://arxiv.org/abs/1704.00605, "Faster Base64
// Encoding and Decoding using AVX2 Instructions". URL modifications added.
// Set up constants
__ lea(r13, ExternalAddress(StubRoutines::x86::base64_AVX2_decode_tables_addr()));
__ vpbroadcastd(xmm4, Address(r13, isURL, Address::times_1), Assembler::AVX_256bit); // 2F or 5F
__ vpbroadcastd(xmm10, Address(r13, isURL, Address::times_1, 0x08), Assembler::AVX_256bit); // -1 or -4
__ vmovdqu(xmm12, Address(r13, 0x10)); // permute
__ vmovdqu(xmm13, Address(r13, 0x30)); // shuffle
__ vpbroadcastd(xmm7, Address(r13, 0x50), Assembler::AVX_256bit); // merge
__ vpbroadcastd(xmm6, Address(r13, 0x54), Assembler::AVX_256bit); // merge mult
__ lea(r13, ExternalAddress(StubRoutines::x86::base64_AVX2_decode_LUT_tables_addr()));
__ shll(isURL, 4);
__ vmovdqu(xmm11, Address(r13, isURL, Address::times_1, 0x00)); // lut_lo
__ vmovdqu(xmm8, Address(r13, isURL, Address::times_1, 0x20)); // lut_roll
__ shrl(isURL, 6); // restore isURL
__ vmovdqu(xmm9, Address(r13, 0x80)); // lut_hi
__ jmp(L_enterLoop);
__ align32();
__ bind(L_topLoop);
// Add in the offset value (roll) to get 6-bit out values
__ vpaddb(xmm0, xmm0, xmm2, Assembler::AVX_256bit);
// Merge and permute the output bits into appropriate output byte lanes
__ vpmaddubsw(xmm0, xmm0, xmm7, Assembler::AVX_256bit);
__ vpmaddwd(xmm0, xmm0, xmm6, Assembler::AVX_256bit);
__ vpshufb(xmm0, xmm0, xmm13, Assembler::AVX_256bit);
__ vpermd(xmm0, xmm12, xmm0, Assembler::AVX_256bit);
// Store the output bytes
__ vmovdqu(Address(dest, dp, Address::times_1, 0), xmm0);
__ addptr(source, 0x20);
__ addptr(dest, 0x18);
__ subl(length, 0x20);
__ jcc(Assembler::less, L_tailProc);
__ bind(L_enterLoop);
// Load in encoded string (32 bytes)
__ vmovdqu(xmm2, Address(source, start_offset, Address::times_1, 0x0));
// Extract the high nibble for indexing into the lut tables. High 4 bits are don't care.
__ vpsrld(xmm1, xmm2, 0x4, Assembler::AVX_256bit);
__ vpand(xmm1, xmm4, xmm1, Assembler::AVX_256bit);
// Extract the low nibble. 5F/2F will isolate the low-order 4 bits. High 4 bits are don't care.
__ vpand(xmm3, xmm2, xmm4, Assembler::AVX_256bit);
// Check for special-case (0x2F or 0x5F (URL))
__ vpcmpeqb(xmm0, xmm4, xmm2, Assembler::AVX_256bit);
// Get the bitset based on the low nibble. vpshufb uses low-order 4 bits only.
__ vpshufb(xmm3, xmm11, xmm3, Assembler::AVX_256bit);
// Get the bit value of the high nibble
__ vpshufb(xmm5, xmm9, xmm1, Assembler::AVX_256bit);
// Make sure 2F / 5F shows as valid
__ vpandn(xmm3, xmm0, xmm3, Assembler::AVX_256bit);
// Make adjustment for roll index. For non-URL, this is a no-op,
// for URL, this adjusts by -4. This is to properly index the
// roll value for 2F / 5F.
__ vpand(xmm0, xmm0, xmm10, Assembler::AVX_256bit);
// If the and of the two is non-zero, we have an invalid input character
__ vptest(xmm3, xmm5);
// Extract the "roll" value - value to add to the input to get 6-bit out value
__ vpaddb(xmm0, xmm0, xmm1, Assembler::AVX_256bit); // Handle 2F / 5F
__ vpshufb(xmm0, xmm8, xmm0, Assembler::AVX_256bit);
__ jcc(Assembler::equal, L_topLoop); // Fall through on error
__ bind(L_tailProc);
__ addl(length, 0x2c);
__ vzeroupper();
}
// Use non-AVX code to decode 4-byte chunks into 3 bytes of output
// Register state (Linux):
// r12-15 - saved on stack
// rdi - src
// rsi - sp
// rdx - sl
// rcx - dst
// r8 - dp
// r9 - isURL
// Register state (Windows):
// r12-15 - saved on stack
// rcx - src
// rdx - sp
// r8 - sl
// r9 - dst
// r12 - dp
// r10 - isURL
// Registers (common):
// length (r14) - bytes in src
const Register decode_table = r11;
const Register out_byte_count = rbx;
const Register byte1 = r13;
const Register byte2 = r15;
const Register byte3 = WIN64_ONLY(r8) NOT_WIN64(rdx);
const Register byte4 = WIN64_ONLY(r10) NOT_WIN64(r9);
__ bind(L_lastChunk);
__ shrl(length, 2); // Multiple of 4 bytes only - length is # 4-byte chunks
__ cmpl(length, 0);
__ jcc(Assembler::lessEqual, L_exit_no_vzero);
__ shll(isURL, 8); // index into decode table based on isURL
__ lea(decode_table, ExternalAddress(StubRoutines::x86::base64_decoding_table_addr()));
__ addptr(decode_table, isURL);
__ jmp(L_bottomLoop);
__ align32();
__ BIND(L_forceLoop);
__ shll(byte1, 18);
__ shll(byte2, 12);
__ shll(byte3, 6);
__ orl(byte1, byte2);
__ orl(byte1, byte3);
__ orl(byte1, byte4);
__ addptr(source, 4);
__ movb(Address(dest, dp, Address::times_1, 2), byte1);
__ shrl(byte1, 8);
__ movb(Address(dest, dp, Address::times_1, 1), byte1);
__ shrl(byte1, 8);
__ movb(Address(dest, dp, Address::times_1, 0), byte1);
__ addptr(dest, 3);
__ decrementl(length, 1);
__ jcc(Assembler::zero, L_exit_no_vzero);
__ BIND(L_bottomLoop);
__ load_unsigned_byte(byte1, Address(source, start_offset, Address::times_1, 0x00));
__ load_unsigned_byte(byte2, Address(source, start_offset, Address::times_1, 0x01));
__ load_signed_byte(byte1, Address(decode_table, byte1));
__ load_signed_byte(byte2, Address(decode_table, byte2));
__ load_unsigned_byte(byte3, Address(source, start_offset, Address::times_1, 0x02));
__ load_unsigned_byte(byte4, Address(source, start_offset, Address::times_1, 0x03));
__ load_signed_byte(byte3, Address(decode_table, byte3));
__ load_signed_byte(byte4, Address(decode_table, byte4));
__ mov(rax, byte1);
__ orl(rax, byte2);
__ orl(rax, byte3);
__ orl(rax, byte4);
__ jcc(Assembler::positive, L_forceLoop);
__ BIND(L_exit_no_vzero);
__ pop(rax); // Get original dest value
__ subptr(dest, rax); // Number of bytes converted
__ movptr(rax, dest);
__ pop(rbx);
__ pop(r15);
__ pop(r14);
__ pop(r13);
__ pop(r12);
__ leave();
__ ret(0);
return start;
}
/**
* Arguments:
*
* Inputs:
* c_rarg0 - int crc
* c_rarg1 - byte* buf
* c_rarg2 - int length
*
* Output:
* rax - int crc result
*/
address StubGenerator::generate_updateBytesCRC32() {
assert(UseCRC32Intrinsics, "need AVX and CLMUL instructions");
__ align(CodeEntryAlignment);
StubCodeMark mark(this, "StubRoutines", "updateBytesCRC32");
address start = __ pc();
// Win64: rcx, rdx, r8, r9 (c_rarg0, c_rarg1, ...)
// Unix: rdi, rsi, rdx, rcx, r8, r9 (c_rarg0, c_rarg1, ...)
// rscratch1: r10
const Register crc = c_rarg0; // crc
const Register buf = c_rarg1; // source java byte array address
const Register len = c_rarg2; // length
const Register table = c_rarg3; // crc_table address (reuse register)
const Register tmp1 = r11;
const Register tmp2 = r10;
assert_different_registers(crc, buf, len, table, tmp1, tmp2, rax);
BLOCK_COMMENT("Entry:");
__ enter(); // required for proper stackwalking of RuntimeStub frame
if (VM_Version::supports_sse4_1() && VM_Version::supports_avx512_vpclmulqdq() &&
VM_Version::supports_avx512bw() &&
VM_Version::supports_avx512vl()) {
// The constants used in the CRC32 algorithm requires the 1's compliment of the initial crc value.
// However, the constant table for CRC32-C assumes the original crc value. Account for this
// difference before calling and after returning.
__ lea(table, ExternalAddress(StubRoutines::x86::crc_table_avx512_addr()));
__ notl(crc);
__ kernel_crc32_avx512(crc, buf, len, table, tmp1, tmp2);
__ notl(crc);
} else {
__ kernel_crc32(crc, buf, len, table, tmp1);
}
__ movl(rax, crc);
__ vzeroupper();
__ leave(); // required for proper stackwalking of RuntimeStub frame
__ ret(0);
return start;
}
/**
* Arguments:
*
* Inputs:
* c_rarg0 - int crc
* c_rarg1 - byte* buf
* c_rarg2 - long length
* c_rarg3 - table_start - optional (present only when doing a library_call,
* not used by x86 algorithm)
*
* Output:
* rax - int crc result
*/
address StubGenerator::generate_updateBytesCRC32C(bool is_pclmulqdq_supported) {
assert(UseCRC32CIntrinsics, "need SSE4_2");
__ align(CodeEntryAlignment);
StubCodeMark mark(this, "StubRoutines", "updateBytesCRC32C");
address start = __ pc();
//reg.arg int#0 int#1 int#2 int#3 int#4 int#5 float regs
//Windows RCX RDX R8 R9 none none XMM0..XMM3
//Lin / Sol RDI RSI RDX RCX R8 R9 XMM0..XMM7
const Register crc = c_rarg0; // crc
const Register buf = c_rarg1; // source java byte array address
const Register len = c_rarg2; // length
const Register a = rax;
const Register j = r9;
const Register k = r10;
const Register l = r11;
#ifdef _WIN64
const Register y = rdi;
const Register z = rsi;
#else
const Register y = rcx;
const Register z = r8;
#endif
assert_different_registers(crc, buf, len, a, j, k, l, y, z);
BLOCK_COMMENT("Entry:");
__ enter(); // required for proper stackwalking of RuntimeStub frame
Label L_continue;
if (VM_Version::supports_sse4_1() && VM_Version::supports_avx512_vpclmulqdq() &&
VM_Version::supports_avx512bw() &&
VM_Version::supports_avx512vl()) {
Label L_doSmall;
__ cmpl(len, 384);
__ jcc(Assembler::lessEqual, L_doSmall);
__ lea(j, ExternalAddress(StubRoutines::x86::crc32c_table_avx512_addr()));
__ kernel_crc32_avx512(crc, buf, len, j, l, k);
__ jmp(L_continue);
__ bind(L_doSmall);
}
#ifdef _WIN64
__ push(y);
__ push(z);
#endif
__ crc32c_ipl_alg2_alt2(crc, buf, len,
a, j, k,
l, y, z,
c_farg0, c_farg1, c_farg2,
is_pclmulqdq_supported);
#ifdef _WIN64
__ pop(z);
__ pop(y);
#endif
__ bind(L_continue);
__ movl(rax, crc);
__ vzeroupper();
__ leave(); // required for proper stackwalking of RuntimeStub frame
__ ret(0);
return start;
}
/**
* Arguments:
*
* Input:
* c_rarg0 - x address
* c_rarg1 - x length
* c_rarg2 - y address
* c_rarg3 - y length
* not Win64
* c_rarg4 - z address
* Win64
* rsp+40 - z address
*/
address StubGenerator::generate_multiplyToLen() {
__ align(CodeEntryAlignment);
StubCodeMark mark(this, "StubRoutines", "multiplyToLen");
address start = __ pc();
// Win64: rcx, rdx, r8, r9 (c_rarg0, c_rarg1, ...)
// Unix: rdi, rsi, rdx, rcx, r8, r9 (c_rarg0, c_rarg1, ...)
const Register x = rdi;
const Register xlen = rax;
const Register y = rsi;
const Register ylen = rcx;
const Register z = r8;
// Next registers will be saved on stack in multiply_to_len().
const Register tmp0 = r11;
const Register tmp1 = r12;
const Register tmp2 = r13;
const Register tmp3 = r14;
const Register tmp4 = r15;
const Register tmp5 = rbx;
BLOCK_COMMENT("Entry:");
__ enter(); // required for proper stackwalking of RuntimeStub frame
setup_arg_regs(4); // x => rdi, xlen => rsi, y => rdx
// ylen => rcx, z => r8
// r9 and r10 may be used to save non-volatile registers
#ifdef _WIN64
// last argument (#4) is on stack on Win64
__ movptr(z, Address(rsp, 6 * wordSize));
#endif
__ movptr(xlen, rsi);
__ movptr(y, rdx);
__ multiply_to_len(x, xlen, y, ylen, z, tmp0, tmp1, tmp2, tmp3, tmp4, tmp5);
restore_arg_regs();
__ leave(); // required for proper stackwalking of RuntimeStub frame
__ ret(0);
return start;
}
/**
* Arguments:
*
* Input:
* c_rarg0 - obja address
* c_rarg1 - objb address
* c_rarg3 - length length
* c_rarg4 - scale log2_array_indxscale
*
* Output:
* rax - int >= mismatched index, < 0 bitwise complement of tail
*/
address StubGenerator::generate_vectorizedMismatch() {
__ align(CodeEntryAlignment);
StubCodeMark mark(this, "StubRoutines", "vectorizedMismatch");
address start = __ pc();
BLOCK_COMMENT("Entry:");
__ enter();
#ifdef _WIN64 // Win64: rcx, rdx, r8, r9 (c_rarg0, c_rarg1, ...)
const Register scale = c_rarg0; //rcx, will exchange with r9
const Register objb = c_rarg1; //rdx
const Register length = c_rarg2; //r8
const Register obja = c_rarg3; //r9
__ xchgq(obja, scale); //now obja and scale contains the correct contents
const Register tmp1 = r10;
const Register tmp2 = r11;
#endif
#ifndef _WIN64 // Unix: rdi, rsi, rdx, rcx, r8, r9 (c_rarg0, c_rarg1, ...)
const Register obja = c_rarg0; //U:rdi
const Register objb = c_rarg1; //U:rsi
const Register length = c_rarg2; //U:rdx
const Register scale = c_rarg3; //U:rcx
const Register tmp1 = r8;
const Register tmp2 = r9;
#endif
const Register result = rax; //return value
const XMMRegister vec0 = xmm0;
const XMMRegister vec1 = xmm1;
const XMMRegister vec2 = xmm2;
__ vectorized_mismatch(obja, objb, length, scale, result, tmp1, tmp2, vec0, vec1, vec2);
__ vzeroupper();
__ leave();
__ ret(0);
return start;
}
/**
* Arguments:
*
// Input:
// c_rarg0 - x address
// c_rarg1 - x length
// c_rarg2 - z address
// c_rarg3 - z length
*
*/
address StubGenerator::generate_squareToLen() {
__ align(CodeEntryAlignment);
StubCodeMark mark(this, "StubRoutines", "squareToLen");
address start = __ pc();
// Win64: rcx, rdx, r8, r9 (c_rarg0, c_rarg1, ...)
// Unix: rdi, rsi, rdx, rcx (c_rarg0, c_rarg1, ...)
const Register x = rdi;
const Register len = rsi;
const Register z = r8;
const Register zlen = rcx;
const Register tmp1 = r12;
const Register tmp2 = r13;
const Register tmp3 = r14;
const Register tmp4 = r15;
const Register tmp5 = rbx;
BLOCK_COMMENT("Entry:");
__ enter(); // required for proper stackwalking of RuntimeStub frame
setup_arg_regs(4); // x => rdi, len => rsi, z => rdx
// zlen => rcx
// r9 and r10 may be used to save non-volatile registers
__ movptr(r8, rdx);
__ square_to_len(x, len, z, zlen, tmp1, tmp2, tmp3, tmp4, tmp5, rdx, rax);
restore_arg_regs();
__ leave(); // required for proper stackwalking of RuntimeStub frame
__ ret(0);
return start;
}
address StubGenerator::generate_method_entry_barrier() {
__ align(CodeEntryAlignment);
StubCodeMark mark(this, "StubRoutines", "nmethod_entry_barrier");
address start = __ pc();
Label deoptimize_label;
__ push(-1); // cookie, this is used for writing the new rsp when deoptimizing
BLOCK_COMMENT("Entry:");
__ enter(); // save rbp
// save c_rarg0, because we want to use that value.
// We could do without it but then we depend on the number of slots used by pusha
__ push(c_rarg0);
__ lea(c_rarg0, Address(rsp, wordSize * 3)); // 1 for cookie, 1 for rbp, 1 for c_rarg0 - this should be the return address
__ pusha();
// The method may have floats as arguments, and we must spill them before calling
// the VM runtime.
assert(Argument::n_float_register_parameters_j == 8, "Assumption");
const int xmm_size = wordSize * 2;
const int xmm_spill_size = xmm_size * Argument::n_float_register_parameters_j;
__ subptr(rsp, xmm_spill_size);
__ movdqu(Address(rsp, xmm_size * 7), xmm7);
__ movdqu(Address(rsp, xmm_size * 6), xmm6);
__ movdqu(Address(rsp, xmm_size * 5), xmm5);
__ movdqu(Address(rsp, xmm_size * 4), xmm4);
__ movdqu(Address(rsp, xmm_size * 3), xmm3);
__ movdqu(Address(rsp, xmm_size * 2), xmm2);
__ movdqu(Address(rsp, xmm_size * 1), xmm1);
__ movdqu(Address(rsp, xmm_size * 0), xmm0);
__ call_VM_leaf(CAST_FROM_FN_PTR(address, static_cast<int (*)(address*)>(BarrierSetNMethod::nmethod_stub_entry_barrier)), 1);
__ movdqu(xmm0, Address(rsp, xmm_size * 0));
__ movdqu(xmm1, Address(rsp, xmm_size * 1));
__ movdqu(xmm2, Address(rsp, xmm_size * 2));
__ movdqu(xmm3, Address(rsp, xmm_size * 3));
__ movdqu(xmm4, Address(rsp, xmm_size * 4));
__ movdqu(xmm5, Address(rsp, xmm_size * 5));
__ movdqu(xmm6, Address(rsp, xmm_size * 6));
__ movdqu(xmm7, Address(rsp, xmm_size * 7));
__ addptr(rsp, xmm_spill_size);
__ cmpl(rax, 1); // 1 means deoptimize
__ jcc(Assembler::equal, deoptimize_label);
__ popa();
__ pop(c_rarg0);
__ leave();
__ addptr(rsp, 1 * wordSize); // cookie
__ ret(0);
__ BIND(deoptimize_label);
__ popa();
__ pop(c_rarg0);
__ leave();
// this can be taken out, but is good for verification purposes. getting a SIGSEGV
// here while still having a correct stack is valuable
__ testptr(rsp, Address(rsp, 0));
__ movptr(rsp, Address(rsp, 0)); // new rsp was written in the barrier
__ jmp(Address(rsp, -1 * wordSize)); // jmp target should be callers verified_entry_point
return start;
}
/**
* Arguments:
*
* Input:
* c_rarg0 - out address
* c_rarg1 - in address
* c_rarg2 - offset
* c_rarg3 - len
* not Win64
* c_rarg4 - k
* Win64
* rsp+40 - k
*/
address StubGenerator::generate_mulAdd() {
__ align(CodeEntryAlignment);
StubCodeMark mark(this, "StubRoutines", "mulAdd");
address start = __ pc();
// Win64: rcx, rdx, r8, r9 (c_rarg0, c_rarg1, ...)
// Unix: rdi, rsi, rdx, rcx, r8, r9 (c_rarg0, c_rarg1, ...)
const Register out = rdi;
const Register in = rsi;
const Register offset = r11;
const Register len = rcx;
const Register k = r8;
// Next registers will be saved on stack in mul_add().
const Register tmp1 = r12;
const Register tmp2 = r13;
const Register tmp3 = r14;
const Register tmp4 = r15;
const Register tmp5 = rbx;
BLOCK_COMMENT("Entry:");
__ enter(); // required for proper stackwalking of RuntimeStub frame
setup_arg_regs(4); // out => rdi, in => rsi, offset => rdx
// len => rcx, k => r8
// r9 and r10 may be used to save non-volatile registers
#ifdef _WIN64
// last argument is on stack on Win64
__ movl(k, Address(rsp, 6 * wordSize));
#endif
__ movptr(r11, rdx); // move offset in rdx to offset(r11)
__ mul_add(out, in, offset, len, k, tmp1, tmp2, tmp3, tmp4, tmp5, rdx, rax);
restore_arg_regs();
__ leave(); // required for proper stackwalking of RuntimeStub frame
__ ret(0);
return start;
}
address StubGenerator::generate_bigIntegerRightShift() {
__ align(CodeEntryAlignment);
StubCodeMark mark(this, "StubRoutines", "bigIntegerRightShiftWorker");
address start = __ pc();
Label Shift512Loop, ShiftTwo, ShiftTwoLoop, ShiftOne, Exit;
// For Unix, the arguments are as follows: rdi, rsi, rdx, rcx, r8.
const Register newArr = rdi;
const Register oldArr = rsi;
const Register newIdx = rdx;
const Register shiftCount = rcx; // It was intentional to have shiftCount in rcx since it is used implicitly for shift.
const Register totalNumIter = r8;
// For windows, we use r9 and r10 as temps to save rdi and rsi. Thus we cannot allocate them for our temps.
// For everything else, we prefer using r9 and r10 since we do not have to save them before use.
const Register tmp1 = r11; // Caller save.
const Register tmp2 = rax; // Caller save.
const Register tmp3 = WIN64_ONLY(r12) NOT_WIN64(r9); // Windows: Callee save. Linux: Caller save.
const Register tmp4 = WIN64_ONLY(r13) NOT_WIN64(r10); // Windows: Callee save. Linux: Caller save.
const Register tmp5 = r14; // Callee save.
const Register tmp6 = r15;
const XMMRegister x0 = xmm0;
const XMMRegister x1 = xmm1;
const XMMRegister x2 = xmm2;
BLOCK_COMMENT("Entry:");
__ enter(); // required for proper stackwalking of RuntimeStub frame
#ifdef _WIN64
setup_arg_regs(4);
// For windows, since last argument is on stack, we need to move it to the appropriate register.
__ movl(totalNumIter, Address(rsp, 6 * wordSize));
// Save callee save registers.
__ push(tmp3);
__ push(tmp4);
#endif
__ push(tmp5);
// Rename temps used throughout the code.
const Register idx = tmp1;
const Register nIdx = tmp2;
__ xorl(idx, idx);
// Start right shift from end of the array.
// For example, if #iteration = 4 and newIdx = 1
// then dest[4] = src[4] >> shiftCount | src[3] <<< (shiftCount - 32)
// if #iteration = 4 and newIdx = 0
// then dest[3] = src[4] >> shiftCount | src[3] <<< (shiftCount - 32)
__ movl(idx, totalNumIter);
__ movl(nIdx, idx);
__ addl(nIdx, newIdx);
// If vectorization is enabled, check if the number of iterations is at least 64
// If not, then go to ShifTwo processing 2 iterations
if (VM_Version::supports_avx512_vbmi2()) {
__ cmpptr(totalNumIter, (AVX3Threshold/64));
__ jcc(Assembler::less, ShiftTwo);
if (AVX3Threshold < 16 * 64) {
__ cmpl(totalNumIter, 16);
__ jcc(Assembler::less, ShiftTwo);
}
__ evpbroadcastd(x0, shiftCount, Assembler::AVX_512bit);
__ subl(idx, 16);
__ subl(nIdx, 16);
__ BIND(Shift512Loop);
__ evmovdqul(x2, Address(oldArr, idx, Address::times_4, 4), Assembler::AVX_512bit);
__ evmovdqul(x1, Address(oldArr, idx, Address::times_4), Assembler::AVX_512bit);
__ vpshrdvd(x2, x1, x0, Assembler::AVX_512bit);
__ evmovdqul(Address(newArr, nIdx, Address::times_4), x2, Assembler::AVX_512bit);
__ subl(nIdx, 16);
__ subl(idx, 16);
__ jcc(Assembler::greaterEqual, Shift512Loop);
__ addl(idx, 16);
__ addl(nIdx, 16);
}
__ BIND(ShiftTwo);
__ cmpl(idx, 2);
__ jcc(Assembler::less, ShiftOne);
__ subl(idx, 2);
__ subl(nIdx, 2);
__ BIND(ShiftTwoLoop);
__ movl(tmp5, Address(oldArr, idx, Address::times_4, 8));
__ movl(tmp4, Address(oldArr, idx, Address::times_4, 4));
__ movl(tmp3, Address(oldArr, idx, Address::times_4));
__ shrdl(tmp5, tmp4);
__ shrdl(tmp4, tmp3);
__ movl(Address(newArr, nIdx, Address::times_4, 4), tmp5);
__ movl(Address(newArr, nIdx, Address::times_4), tmp4);
__ subl(nIdx, 2);
__ subl(idx, 2);
__ jcc(Assembler::greaterEqual, ShiftTwoLoop);
__ addl(idx, 2);
__ addl(nIdx, 2);
// Do the last iteration
__ BIND(ShiftOne);
__ cmpl(idx, 1);
__ jcc(Assembler::less, Exit);
__ subl(idx, 1);
__ subl(nIdx, 1);
__ movl(tmp4, Address(oldArr, idx, Address::times_4, 4));
__ movl(tmp3, Address(oldArr, idx, Address::times_4));
__ shrdl(tmp4, tmp3);
__ movl(Address(newArr, nIdx, Address::times_4), tmp4);
__ BIND(Exit);
__ vzeroupper();
// Restore callee save registers.
__ pop(tmp5);
#ifdef _WIN64
__ pop(tmp4);
__ pop(tmp3);
restore_arg_regs();
#endif
__ leave(); // required for proper stackwalking of RuntimeStub frame
__ ret(0);
return start;
}
/**
* Arguments:
*
* Input:
* c_rarg0 - newArr address
* c_rarg1 - oldArr address
* c_rarg2 - newIdx
* c_rarg3 - shiftCount
* not Win64
* c_rarg4 - numIter
* Win64
* rsp40 - numIter
*/
address StubGenerator::generate_bigIntegerLeftShift() {
__ align(CodeEntryAlignment);
StubCodeMark mark(this, "StubRoutines", "bigIntegerLeftShiftWorker");
address start = __ pc();
Label Shift512Loop, ShiftTwo, ShiftTwoLoop, ShiftOne, Exit;
// For Unix, the arguments are as follows: rdi, rsi, rdx, rcx, r8.
const Register newArr = rdi;
const Register oldArr = rsi;
const Register newIdx = rdx;
const Register shiftCount = rcx; // It was intentional to have shiftCount in rcx since it is used implicitly for shift.
const Register totalNumIter = r8;
// For windows, we use r9 and r10 as temps to save rdi and rsi. Thus we cannot allocate them for our temps.
// For everything else, we prefer using r9 and r10 since we do not have to save them before use.
const Register tmp1 = r11; // Caller save.
const Register tmp2 = rax; // Caller save.
const Register tmp3 = WIN64_ONLY(r12) NOT_WIN64(r9); // Windows: Callee save. Linux: Caller save.
const Register tmp4 = WIN64_ONLY(r13) NOT_WIN64(r10); // Windows: Callee save. Linux: Caller save.
const Register tmp5 = r14; // Callee save.
const XMMRegister x0 = xmm0;
const XMMRegister x1 = xmm1;
const XMMRegister x2 = xmm2;
BLOCK_COMMENT("Entry:");
__ enter(); // required for proper stackwalking of RuntimeStub frame
#ifdef _WIN64
setup_arg_regs(4);
// For windows, since last argument is on stack, we need to move it to the appropriate register.
__ movl(totalNumIter, Address(rsp, 6 * wordSize));
// Save callee save registers.
__ push(tmp3);
__ push(tmp4);
#endif
__ push(tmp5);
// Rename temps used throughout the code
const Register idx = tmp1;
const Register numIterTmp = tmp2;
// Start idx from zero.
__ xorl(idx, idx);
// Compute interior pointer for new array. We do this so that we can use same index for both old and new arrays.
__ lea(newArr, Address(newArr, newIdx, Address::times_4));
__ movl(numIterTmp, totalNumIter);
// If vectorization is enabled, check if the number of iterations is at least 64
// If not, then go to ShiftTwo shifting two numbers at a time
if (VM_Version::supports_avx512_vbmi2()) {
__ cmpl(totalNumIter, (AVX3Threshold/64));
__ jcc(Assembler::less, ShiftTwo);
if (AVX3Threshold < 16 * 64) {
__ cmpl(totalNumIter, 16);
__ jcc(Assembler::less, ShiftTwo);
}
__ evpbroadcastd(x0, shiftCount, Assembler::AVX_512bit);
__ subl(numIterTmp, 16);
__ BIND(Shift512Loop);
__ evmovdqul(x1, Address(oldArr, idx, Address::times_4), Assembler::AVX_512bit);
__ evmovdqul(x2, Address(oldArr, idx, Address::times_4, 0x4), Assembler::AVX_512bit);
__ vpshldvd(x1, x2, x0, Assembler::AVX_512bit);
__ evmovdqul(Address(newArr, idx, Address::times_4), x1, Assembler::AVX_512bit);
__ addl(idx, 16);
__ subl(numIterTmp, 16);
__ jcc(Assembler::greaterEqual, Shift512Loop);
__ addl(numIterTmp, 16);
}
__ BIND(ShiftTwo);
__ cmpl(totalNumIter, 1);
__ jcc(Assembler::less, Exit);
__ movl(tmp3, Address(oldArr, idx, Address::times_4));
__ subl(numIterTmp, 2);
__ jcc(Assembler::less, ShiftOne);
__ BIND(ShiftTwoLoop);
__ movl(tmp4, Address(oldArr, idx, Address::times_4, 0x4));
__ movl(tmp5, Address(oldArr, idx, Address::times_4, 0x8));
__ shldl(tmp3, tmp4);
__ shldl(tmp4, tmp5);
__ movl(Address(newArr, idx, Address::times_4), tmp3);
__ movl(Address(newArr, idx, Address::times_4, 0x4), tmp4);
__ movl(tmp3, tmp5);
__ addl(idx, 2);
__ subl(numIterTmp, 2);
__ jcc(Assembler::greaterEqual, ShiftTwoLoop);
// Do the last iteration
__ BIND(ShiftOne);
__ addl(numIterTmp, 2);
__ cmpl(numIterTmp, 1);
__ jcc(Assembler::less, Exit);
__ movl(tmp4, Address(oldArr, idx, Address::times_4, 0x4));
__ shldl(tmp3, tmp4);
__ movl(Address(newArr, idx, Address::times_4), tmp3);
__ BIND(Exit);
__ vzeroupper();
// Restore callee save registers.
__ pop(tmp5);
#ifdef _WIN64
__ pop(tmp4);
__ pop(tmp3);
restore_arg_regs();
#endif
__ leave(); // required for proper stackwalking of RuntimeStub frame
__ ret(0);
return start;
}
void StubGenerator::generate_libm_stubs() {
if (UseLibmIntrinsic && InlineIntrinsics) {
if (vmIntrinsics::is_intrinsic_available(vmIntrinsics::_dsin)) {
StubRoutines::_dsin = generate_libmSin(); // from stubGenerator_x86_64_sin.cpp
}
if (vmIntrinsics::is_intrinsic_available(vmIntrinsics::_dcos)) {
StubRoutines::_dcos = generate_libmCos(); // from stubGenerator_x86_64_cos.cpp
}
if (vmIntrinsics::is_intrinsic_available(vmIntrinsics::_dtan)) {
StubRoutines::_dtan = generate_libmTan(); // from stubGenerator_x86_64_tan.cpp
}
if (vmIntrinsics::is_intrinsic_available(vmIntrinsics::_dexp)) {
StubRoutines::_dexp = generate_libmExp(); // from stubGenerator_x86_64_exp.cpp
}
if (vmIntrinsics::is_intrinsic_available(vmIntrinsics::_dpow)) {
StubRoutines::_dpow = generate_libmPow(); // from stubGenerator_x86_64_pow.cpp
}
if (vmIntrinsics::is_intrinsic_available(vmIntrinsics::_dlog)) {
StubRoutines::_dlog = generate_libmLog(); // from stubGenerator_x86_64_log.cpp
}
if (vmIntrinsics::is_intrinsic_available(vmIntrinsics::_dlog10)) {
StubRoutines::_dlog10 = generate_libmLog10(); // from stubGenerator_x86_64_log.cpp
}
}
}
/**
* Arguments:
*
* Input:
* c_rarg0 - float16 jshort
*
* Output:
* xmm0 - float
*/
address StubGenerator::generate_float16ToFloat() {
StubCodeMark mark(this, "StubRoutines", "float16ToFloat");
address start = __ pc();
BLOCK_COMMENT("Entry:");
// No need for RuntimeStub frame since it is called only during JIT compilation
// Load value into xmm0 and convert
__ flt16_to_flt(xmm0, c_rarg0);
__ ret(0);
return start;
}
/**
* Arguments:
*
* Input:
* xmm0 - float
*
* Output:
* rax - float16 jshort
*/
address StubGenerator::generate_floatToFloat16() {
StubCodeMark mark(this, "StubRoutines", "floatToFloat16");
address start = __ pc();
BLOCK_COMMENT("Entry:");
// No need for RuntimeStub frame since it is called only during JIT compilation
// Convert and put result into rax
__ flt_to_flt16(rax, xmm0, xmm1);
__ ret(0);
return start;
}
address StubGenerator::generate_cont_thaw(const char* label, Continuation::thaw_kind kind) {
if (!Continuations::enabled()) return nullptr;
bool return_barrier = Continuation::is_thaw_return_barrier(kind);
bool return_barrier_exception = Continuation::is_thaw_return_barrier_exception(kind);
StubCodeMark mark(this, "StubRoutines", label);
address start = __ pc();
// TODO: Handle Valhalla return types. May require generating different return barriers.
if (!return_barrier) {
// Pop return address. If we don't do this, we get a drift,
// where the bottom-most frozen frame continuously grows.
__ pop(c_rarg3);
} else {
__ movptr(rsp, Address(r15_thread, JavaThread::cont_entry_offset()));
}
#ifdef ASSERT
{
Label L_good_sp;
__ cmpptr(rsp, Address(r15_thread, JavaThread::cont_entry_offset()));
__ jcc(Assembler::equal, L_good_sp);
__ stop("Incorrect rsp at thaw entry");
__ BIND(L_good_sp);
}
#endif // ASSERT
if (return_barrier) {
// Preserve possible return value from a method returning to the return barrier.
__ push(rax);
__ push_d(xmm0);
}
__ movptr(c_rarg0, r15_thread);
__ movptr(c_rarg1, (return_barrier ? 1 : 0));
__ call_VM_leaf(CAST_FROM_FN_PTR(address, Continuation::prepare_thaw), 2);
__ movptr(rbx, rax);
if (return_barrier) {
// Restore return value from a method returning to the return barrier.
// No safepoint in the call to thaw, so even an oop return value should be OK.
__ pop_d(xmm0);
__ pop(rax);
}
#ifdef ASSERT
{
Label L_good_sp;
__ cmpptr(rsp, Address(r15_thread, JavaThread::cont_entry_offset()));
__ jcc(Assembler::equal, L_good_sp);
__ stop("Incorrect rsp after prepare thaw");
__ BIND(L_good_sp);
}
#endif // ASSERT
// rbx contains the size of the frames to thaw, 0 if overflow or no more frames
Label L_thaw_success;
__ testptr(rbx, rbx);
__ jccb(Assembler::notZero, L_thaw_success);
__ jump(ExternalAddress(StubRoutines::throw_StackOverflowError_entry()));
__ bind(L_thaw_success);
// Make room for the thawed frames and align the stack.
__ subptr(rsp, rbx);
__ andptr(rsp, -StackAlignmentInBytes);
if (return_barrier) {
// Preserve possible return value from a method returning to the return barrier. (Again.)
__ push(rax);
__ push_d(xmm0);
}
// If we want, we can templatize thaw by kind, and have three different entries.
__ movptr(c_rarg0, r15_thread);
__ movptr(c_rarg1, kind);
__ call_VM_leaf(Continuation::thaw_entry(), 2);
__ movptr(rbx, rax);
if (return_barrier) {
// Restore return value from a method returning to the return barrier. (Again.)
// No safepoint in the call to thaw, so even an oop return value should be OK.
__ pop_d(xmm0);
__ pop(rax);
} else {
// Return 0 (success) from doYield.
__ xorptr(rax, rax);
}
// After thawing, rbx is the SP of the yielding frame.
// Move there, and then to saved RBP slot.
__ movptr(rsp, rbx);
__ subptr(rsp, 2*wordSize);
if (return_barrier_exception) {
__ movptr(c_rarg0, r15_thread);
__ movptr(c_rarg1, Address(rsp, wordSize)); // return address
// rax still holds the original exception oop, save it before the call
__ push(rax);
__ call_VM_leaf(CAST_FROM_FN_PTR(address, SharedRuntime::exception_handler_for_return_address), 2);
__ movptr(rbx, rax);
// Continue at exception handler:
// rax: exception oop
// rbx: exception handler
// rdx: exception pc
__ pop(rax);
__ verify_oop(rax);
__ pop(rbp); // pop out RBP here too
__ pop(rdx);
__ jmp(rbx);
} else {
// We are "returning" into the topmost thawed frame; see Thaw::push_return_frame
__ pop(rbp);
__ ret(0);
}
return start;
}
address StubGenerator::generate_cont_thaw() {
return generate_cont_thaw("Cont thaw", Continuation::thaw_top);
}
// TODO: will probably need multiple return barriers depending on return type
address StubGenerator::generate_cont_returnBarrier() {
return generate_cont_thaw("Cont thaw return barrier", Continuation::thaw_return_barrier);
}
address StubGenerator::generate_cont_returnBarrier_exception() {
return generate_cont_thaw("Cont thaw return barrier exception", Continuation::thaw_return_barrier_exception);
}
#if INCLUDE_JFR
// For c2: c_rarg0 is junk, call to runtime to write a checkpoint.
// It returns a jobject handle to the event writer.
// The handle is dereferenced and the return value is the event writer oop.
RuntimeStub* StubGenerator::generate_jfr_write_checkpoint() {
enum layout {
rbp_off,
rbpH_off,
return_off,
return_off2,
framesize // inclusive of return address
};
CodeBuffer code("jfr_write_checkpoint", 1024, 64);
MacroAssembler* _masm = new MacroAssembler(&code);
address start = __ pc();
__ enter();
address the_pc = __ pc();
int frame_complete = the_pc - start;
__ set_last_Java_frame(rsp, rbp, the_pc, rscratch1);
__ movptr(c_rarg0, r15_thread);
__ call_VM_leaf(CAST_FROM_FN_PTR(address, JfrIntrinsicSupport::write_checkpoint), 1);
__ reset_last_Java_frame(true);
// rax is jobject handle result, unpack and process it through a barrier.
__ resolve_global_jobject(rax, r15_thread, c_rarg0);
__ leave();
__ ret(0);
OopMapSet* oop_maps = new OopMapSet();
OopMap* map = new OopMap(framesize, 1);
oop_maps->add_gc_map(frame_complete, map);
RuntimeStub* stub =
RuntimeStub::new_runtime_stub(code.name(),
&code,
frame_complete,
(framesize >> (LogBytesPerWord - LogBytesPerInt)),
oop_maps,
false);
return stub;
}
// For c2: call to return a leased buffer.
RuntimeStub* StubGenerator::generate_jfr_return_lease() {
enum layout {
rbp_off,
rbpH_off,
return_off,
return_off2,
framesize // inclusive of return address
};
CodeBuffer code("jfr_return_lease", 1024, 64);
MacroAssembler* _masm = new MacroAssembler(&code);
address start = __ pc();
__ enter();
address the_pc = __ pc();
int frame_complete = the_pc - start;
__ set_last_Java_frame(rsp, rbp, the_pc, rscratch2);
__ movptr(c_rarg0, r15_thread);
__ call_VM_leaf(CAST_FROM_FN_PTR(address, JfrIntrinsicSupport::return_lease), 1);
__ reset_last_Java_frame(true);
__ leave();
__ ret(0);
OopMapSet* oop_maps = new OopMapSet();
OopMap* map = new OopMap(framesize, 1);
oop_maps->add_gc_map(frame_complete, map);
RuntimeStub* stub =
RuntimeStub::new_runtime_stub(code.name(),
&code,
frame_complete,
(framesize >> (LogBytesPerWord - LogBytesPerInt)),
oop_maps,
false);
return stub;
}
#endif // INCLUDE_JFR
// Continuation point for throwing of implicit exceptions that are
// not handled in the current activation. Fabricates an exception
// oop and initiates normal exception dispatching in this
// frame. Since we need to preserve callee-saved values (currently
// only for C2, but done for C1 as well) we need a callee-saved oop
// map and therefore have to make these stubs into RuntimeStubs
// rather than BufferBlobs. If the compiler needs all registers to
// be preserved between the fault point and the exception handler
// then it must assume responsibility for that in
// AbstractCompiler::continuation_for_implicit_null_exception or
// continuation_for_implicit_division_by_zero_exception. All other
// implicit exceptions (e.g., NullPointerException or
// AbstractMethodError on entry) are either at call sites or
// otherwise assume that stack unwinding will be initiated, so
// caller saved registers were assumed volatile in the compiler.
address StubGenerator::generate_throw_exception(const char* name,
address runtime_entry,
Register arg1,
Register arg2) {
// Information about frame layout at time of blocking runtime call.
// Note that we only have to preserve callee-saved registers since
// the compilers are responsible for supplying a continuation point
// if they expect all registers to be preserved.
enum layout {
rbp_off = frame::arg_reg_save_area_bytes/BytesPerInt,
rbp_off2,
return_off,
return_off2,
framesize // inclusive of return address
};
int insts_size = 512;
int locs_size = 64;
CodeBuffer code(name, insts_size, locs_size);
OopMapSet* oop_maps = new OopMapSet();
MacroAssembler* _masm = new MacroAssembler(&code);
address start = __ pc();
// This is an inlined and slightly modified version of call_VM
// which has the ability to fetch the return PC out of
// thread-local storage and also sets up last_Java_sp slightly
// differently than the real call_VM
__ enter(); // required for proper stackwalking of RuntimeStub frame
assert(is_even(framesize/2), "sp not 16-byte aligned");
// return address and rbp are already in place
__ subptr(rsp, (framesize-4) << LogBytesPerInt); // prolog
int frame_complete = __ pc() - start;
// Set up last_Java_sp and last_Java_fp
address the_pc = __ pc();
__ set_last_Java_frame(rsp, rbp, the_pc, rscratch1);
__ andptr(rsp, -(StackAlignmentInBytes)); // Align stack
// Call runtime
if (arg1 != noreg) {
assert(arg2 != c_rarg1, "clobbered");
__ movptr(c_rarg1, arg1);
}
if (arg2 != noreg) {
__ movptr(c_rarg2, arg2);
}
__ movptr(c_rarg0, r15_thread);
BLOCK_COMMENT("call runtime_entry");
__ call(RuntimeAddress(runtime_entry));
// Generate oop map
OopMap* map = new OopMap(framesize, 0);
oop_maps->add_gc_map(the_pc - start, map);
__ reset_last_Java_frame(true);
__ leave(); // required for proper stackwalking of RuntimeStub frame
// check for pending exceptions
#ifdef ASSERT
Label L;
__ cmpptr(Address(r15_thread, Thread::pending_exception_offset()), NULL_WORD);
__ jcc(Assembler::notEqual, L);
__ should_not_reach_here();
__ bind(L);
#endif // ASSERT
__ jump(RuntimeAddress(StubRoutines::forward_exception_entry()));
// codeBlob framesize is in words (not VMRegImpl::slot_size)
RuntimeStub* stub =
RuntimeStub::new_runtime_stub(name,
&code,
frame_complete,
(framesize >> (LogBytesPerWord - LogBytesPerInt)),
oop_maps, false);
return stub->entry_point();
}
// exception handler for upcall stubs
address StubGenerator::generate_upcall_stub_exception_handler() {
StubCodeMark mark(this, "StubRoutines", "upcall stub exception handler");
address start = __ pc();
// native caller has no idea how to handle exceptions
// we just crash here. Up to callee to catch exceptions.
__ verify_oop(rax);
__ vzeroupper();
__ mov(c_rarg0, rax);
__ andptr(rsp, -StackAlignmentInBytes); // align stack as required by ABI
__ subptr(rsp, frame::arg_reg_save_area_bytes); // windows
__ call(RuntimeAddress(CAST_FROM_FN_PTR(address, UpcallLinker::handle_uncaught_exception)));
__ should_not_reach_here();
return start;
}
address StubGenerator::generate_lookup_secondary_supers_table_stub(u1 super_klass_index) {
StubCodeMark mark(this, "StubRoutines", "lookup_secondary_supers_table");
address start = __ pc();
const Register
r_super_klass = rax,
r_sub_klass = rsi,
result = rdi;
__ lookup_secondary_supers_table(r_sub_klass, r_super_klass,
rdx, rcx, rbx, r11, // temps
result,
super_klass_index);
__ ret(0);
return start;
}
// Slow path implementation for UseSecondarySupersTable.
address StubGenerator::generate_lookup_secondary_supers_table_slow_path_stub() {
StubCodeMark mark(this, "StubRoutines", "lookup_secondary_supers_table");
address start = __ pc();
const Register
r_super_klass = rax,
r_array_base = rbx,
r_array_index = rdx,
r_sub_klass = rsi,
r_bitmap = r11,
result = rdi;
Label L_success;
__ lookup_secondary_supers_table_slow_path(r_super_klass, r_array_base, r_array_index, r_bitmap,
rcx, rdi, // temps
&L_success);
// bind(L_failure);
__ movl(result, 1);
__ ret(0);
__ bind(L_success);
__ movl(result, 0);
__ ret(0);
return start;
}
void StubGenerator::create_control_words() {
// Round to nearest, 64-bit mode, exceptions masked, flags specialized
StubRoutines::x86::_mxcsr_std = EnableX86ECoreOpts ? 0x1FBF : 0x1F80;
// Round to zero, 64-bit mode, exceptions masked, flags specialized
StubRoutines::x86::_mxcsr_rz = EnableX86ECoreOpts ? 0x7FBF : 0x7F80;
}
// Initialization
void StubGenerator::generate_initial_stubs() {
// Generates all stubs and initializes the entry points
// This platform-specific settings are needed by generate_call_stub()
create_control_words();
// Initialize table for unsafe copy memeory check.
if (UnsafeMemoryAccess::_table == nullptr) {
UnsafeMemoryAccess::create_table(16 + 4); // 16 for copyMemory; 4 for setMemory
}
// entry points that exist in all platforms Note: This is code
// that could be shared among different platforms - however the
// benefit seems to be smaller than the disadvantage of having a
// much more complicated generator structure. See also comment in
// stubRoutines.hpp.
StubRoutines::_forward_exception_entry = generate_forward_exception();
StubRoutines::_call_stub_entry =
generate_call_stub(StubRoutines::_call_stub_return_address);
// is referenced by megamorphic call
StubRoutines::_catch_exception_entry = generate_catch_exception();
// atomic calls
StubRoutines::_fence_entry = generate_orderaccess_fence();
// platform dependent
StubRoutines::x86::_get_previous_sp_entry = generate_get_previous_sp();
StubRoutines::x86::_verify_mxcsr_entry = generate_verify_mxcsr();
StubRoutines::x86::_f2i_fixup = generate_f2i_fixup();
StubRoutines::x86::_f2l_fixup = generate_f2l_fixup();
StubRoutines::x86::_d2i_fixup = generate_d2i_fixup();
StubRoutines::x86::_d2l_fixup = generate_d2l_fixup();
StubRoutines::x86::_float_sign_mask = generate_fp_mask("float_sign_mask", 0x7FFFFFFF7FFFFFFF);
StubRoutines::x86::_float_sign_flip = generate_fp_mask("float_sign_flip", 0x8000000080000000);
StubRoutines::x86::_double_sign_mask = generate_fp_mask("double_sign_mask", 0x7FFFFFFFFFFFFFFF);
StubRoutines::x86::_double_sign_flip = generate_fp_mask("double_sign_flip", 0x8000000000000000);
// Build this early so it's available for the interpreter.
StubRoutines::_throw_StackOverflowError_entry =
generate_throw_exception("StackOverflowError throw_exception",
CAST_FROM_FN_PTR(address,
SharedRuntime::
throw_StackOverflowError));
StubRoutines::_throw_delayed_StackOverflowError_entry =
generate_throw_exception("delayed StackOverflowError throw_exception",
CAST_FROM_FN_PTR(address,
SharedRuntime::
throw_delayed_StackOverflowError));
if (UseCRC32Intrinsics) {
// set table address before stub generation which use it
StubRoutines::_crc_table_adr = (address)StubRoutines::x86::_crc_table;
StubRoutines::_updateBytesCRC32 = generate_updateBytesCRC32();
}
if (UseCRC32CIntrinsics) {
bool supports_clmul = VM_Version::supports_clmul();
StubRoutines::x86::generate_CRC32C_table(supports_clmul);
StubRoutines::_crc32c_table_addr = (address)StubRoutines::x86::_crc32c_table;
StubRoutines::_updateBytesCRC32C = generate_updateBytesCRC32C(supports_clmul);
}
if (VM_Version::supports_float16()) {
// For results consistency both intrinsics should be enabled.
// vmIntrinsics checks InlineIntrinsics flag, no need to check it here.
if (vmIntrinsics::is_intrinsic_available(vmIntrinsics::_float16ToFloat) &&
vmIntrinsics::is_intrinsic_available(vmIntrinsics::_floatToFloat16)) {
StubRoutines::_hf2f = generate_float16ToFloat();
StubRoutines::_f2hf = generate_floatToFloat16();
}
}
generate_libm_stubs();
StubRoutines::_fmod = generate_libmFmod(); // from stubGenerator_x86_64_fmod.cpp
}
void StubGenerator::generate_continuation_stubs() {
// Continuation stubs:
StubRoutines::_cont_thaw = generate_cont_thaw();
StubRoutines::_cont_returnBarrier = generate_cont_returnBarrier();
StubRoutines::_cont_returnBarrierExc = generate_cont_returnBarrier_exception();
JFR_ONLY(generate_jfr_stubs();)
}
#if INCLUDE_JFR
void StubGenerator::generate_jfr_stubs() {
StubRoutines::_jfr_write_checkpoint_stub = generate_jfr_write_checkpoint();
StubRoutines::_jfr_write_checkpoint = StubRoutines::_jfr_write_checkpoint_stub->entry_point();
StubRoutines::_jfr_return_lease_stub = generate_jfr_return_lease();
StubRoutines::_jfr_return_lease = StubRoutines::_jfr_return_lease_stub->entry_point();
}
#endif
void StubGenerator::generate_final_stubs() {
// Generates the rest of stubs and initializes the entry points
// These entry points require SharedInfo::stack0 to be set up in
// non-core builds and need to be relocatable, so they each
// fabricate a RuntimeStub internally.
StubRoutines::_throw_AbstractMethodError_entry =
generate_throw_exception("AbstractMethodError throw_exception",
CAST_FROM_FN_PTR(address,
SharedRuntime::
throw_AbstractMethodError));
StubRoutines::_throw_IncompatibleClassChangeError_entry =
generate_throw_exception("IncompatibleClassChangeError throw_exception",
CAST_FROM_FN_PTR(address,
SharedRuntime::
throw_IncompatibleClassChangeError));
StubRoutines::_throw_NullPointerException_at_call_entry =
generate_throw_exception("NullPointerException at call throw_exception",
CAST_FROM_FN_PTR(address,
SharedRuntime::
throw_NullPointerException_at_call));
// support for verify_oop (must happen after universe_init)
if (VerifyOops) {
StubRoutines::_verify_oop_subroutine_entry = generate_verify_oop();
}
// data cache line writeback
StubRoutines::_data_cache_writeback = generate_data_cache_writeback();
StubRoutines::_data_cache_writeback_sync = generate_data_cache_writeback_sync();
// arraycopy stubs used by compilers
generate_arraycopy_stubs();
BarrierSetNMethod* bs_nm = BarrierSet::barrier_set()->barrier_set_nmethod();
if (bs_nm != nullptr) {
StubRoutines::_method_entry_barrier = generate_method_entry_barrier();
}
if (UseVectorizedMismatchIntrinsic) {
StubRoutines::_vectorizedMismatch = generate_vectorizedMismatch();
}
StubRoutines::_upcall_stub_exception_handler = generate_upcall_stub_exception_handler();
}
void StubGenerator::generate_compiler_stubs() {
#if COMPILER2_OR_JVMCI
// Entry points that are C2 compiler specific.
StubRoutines::x86::_vector_float_sign_mask = generate_vector_mask("vector_float_sign_mask", 0x7FFFFFFF7FFFFFFF);
StubRoutines::x86::_vector_float_sign_flip = generate_vector_mask("vector_float_sign_flip", 0x8000000080000000);
StubRoutines::x86::_vector_double_sign_mask = generate_vector_mask("vector_double_sign_mask", 0x7FFFFFFFFFFFFFFF);
StubRoutines::x86::_vector_double_sign_flip = generate_vector_mask("vector_double_sign_flip", 0x8000000000000000);
StubRoutines::x86::_vector_all_bits_set = generate_vector_mask("vector_all_bits_set", 0xFFFFFFFFFFFFFFFF);
StubRoutines::x86::_vector_int_mask_cmp_bits = generate_vector_mask("vector_int_mask_cmp_bits", 0x0000000100000001);
StubRoutines::x86::_vector_short_to_byte_mask = generate_vector_mask("vector_short_to_byte_mask", 0x00ff00ff00ff00ff);
StubRoutines::x86::_vector_byte_perm_mask = generate_vector_byte_perm_mask("vector_byte_perm_mask");
StubRoutines::x86::_vector_int_to_byte_mask = generate_vector_mask("vector_int_to_byte_mask", 0x000000ff000000ff);
StubRoutines::x86::_vector_int_to_short_mask = generate_vector_mask("vector_int_to_short_mask", 0x0000ffff0000ffff);
StubRoutines::x86::_vector_32_bit_mask = generate_vector_custom_i32("vector_32_bit_mask", Assembler::AVX_512bit,
0xFFFFFFFF, 0, 0, 0);
StubRoutines::x86::_vector_64_bit_mask = generate_vector_custom_i32("vector_64_bit_mask", Assembler::AVX_512bit,
0xFFFFFFFF, 0xFFFFFFFF, 0, 0);
StubRoutines::x86::_vector_int_shuffle_mask = generate_vector_mask("vector_int_shuffle_mask", 0x0302010003020100);
StubRoutines::x86::_vector_byte_shuffle_mask = generate_vector_byte_shuffle_mask("vector_byte_shuffle_mask");
StubRoutines::x86::_vector_short_shuffle_mask = generate_vector_mask("vector_short_shuffle_mask", 0x0100010001000100);
StubRoutines::x86::_vector_long_shuffle_mask = generate_vector_mask("vector_long_shuffle_mask", 0x0000000100000000);
StubRoutines::x86::_vector_long_sign_mask = generate_vector_mask("vector_long_sign_mask", 0x8000000000000000);
StubRoutines::x86::_vector_iota_indices = generate_iota_indices("iota_indices");
StubRoutines::x86::_vector_count_leading_zeros_lut = generate_count_leading_zeros_lut("count_leading_zeros_lut");
StubRoutines::x86::_vector_reverse_bit_lut = generate_vector_reverse_bit_lut("reverse_bit_lut");
StubRoutines::x86::_vector_reverse_byte_perm_mask_long = generate_vector_reverse_byte_perm_mask_long("perm_mask_long");
StubRoutines::x86::_vector_reverse_byte_perm_mask_int = generate_vector_reverse_byte_perm_mask_int("perm_mask_int");
StubRoutines::x86::_vector_reverse_byte_perm_mask_short = generate_vector_reverse_byte_perm_mask_short("perm_mask_short");
if (VM_Version::supports_avx2() && !VM_Version::supports_avx512vl()) {
StubRoutines::x86::_compress_perm_table32 = generate_compress_perm_table("compress_perm_table32", 32);
StubRoutines::x86::_compress_perm_table64 = generate_compress_perm_table("compress_perm_table64", 64);
StubRoutines::x86::_expand_perm_table32 = generate_expand_perm_table("expand_perm_table32", 32);
StubRoutines::x86::_expand_perm_table64 = generate_expand_perm_table("expand_perm_table64", 64);
}
if (VM_Version::supports_avx2() && !VM_Version::supports_avx512_vpopcntdq()) {
// lut implementation influenced by counting 1s algorithm from section 5-1 of Hackers' Delight.
StubRoutines::x86::_vector_popcount_lut = generate_popcount_avx_lut("popcount_lut");
}
generate_aes_stubs();
generate_ghash_stubs();
generate_chacha_stubs();
#ifdef COMPILER2
if ((UseAVX == 2) && EnableX86ECoreOpts) {
generate_string_indexof(StubRoutines::_string_indexof_array);
}
#endif
if (UseAdler32Intrinsics) {
StubRoutines::_updateBytesAdler32 = generate_updateBytesAdler32();
}
if (UsePoly1305Intrinsics) {
StubRoutines::_poly1305_processBlocks = generate_poly1305_processBlocks();
}
if (UseIntPolyIntrinsics) {
StubRoutines::_intpoly_montgomeryMult_P256 = generate_intpoly_montgomeryMult_P256();
StubRoutines::_intpoly_assign = generate_intpoly_assign();
}
if (UseMD5Intrinsics) {
StubRoutines::_md5_implCompress = generate_md5_implCompress(false, "md5_implCompress");
StubRoutines::_md5_implCompressMB = generate_md5_implCompress(true, "md5_implCompressMB");
}
if (UseSHA1Intrinsics) {
StubRoutines::x86::_upper_word_mask_addr = generate_upper_word_mask();
StubRoutines::x86::_shuffle_byte_flip_mask_addr = generate_shuffle_byte_flip_mask();
StubRoutines::_sha1_implCompress = generate_sha1_implCompress(false, "sha1_implCompress");
StubRoutines::_sha1_implCompressMB = generate_sha1_implCompress(true, "sha1_implCompressMB");
}
if (UseSHA256Intrinsics) {
StubRoutines::x86::_k256_adr = (address)StubRoutines::x86::_k256;
char* dst = (char*)StubRoutines::x86::_k256_W;
char* src = (char*)StubRoutines::x86::_k256;
for (int ii = 0; ii < 16; ++ii) {
memcpy(dst + 32 * ii, src + 16 * ii, 16);
memcpy(dst + 32 * ii + 16, src + 16 * ii, 16);
}
StubRoutines::x86::_k256_W_adr = (address)StubRoutines::x86::_k256_W;
StubRoutines::x86::_pshuffle_byte_flip_mask_addr = generate_pshuffle_byte_flip_mask();
StubRoutines::_sha256_implCompress = generate_sha256_implCompress(false, "sha256_implCompress");
StubRoutines::_sha256_implCompressMB = generate_sha256_implCompress(true, "sha256_implCompressMB");
}
if (UseSHA512Intrinsics) {
StubRoutines::x86::_k512_W_addr = (address)StubRoutines::x86::_k512_W;
StubRoutines::x86::_pshuffle_byte_flip_mask_addr_sha512 = generate_pshuffle_byte_flip_mask_sha512();
StubRoutines::_sha512_implCompress = generate_sha512_implCompress(false, "sha512_implCompress");
StubRoutines::_sha512_implCompressMB = generate_sha512_implCompress(true, "sha512_implCompressMB");
}
if (UseBASE64Intrinsics) {
if(VM_Version::supports_avx2()) {
StubRoutines::x86::_avx2_shuffle_base64 = base64_avx2_shuffle_addr();
StubRoutines::x86::_avx2_input_mask_base64 = base64_avx2_input_mask_addr();
StubRoutines::x86::_avx2_lut_base64 = base64_avx2_lut_addr();
StubRoutines::x86::_avx2_decode_tables_base64 = base64_AVX2_decode_tables_addr();
StubRoutines::x86::_avx2_decode_lut_tables_base64 = base64_AVX2_decode_LUT_tables_addr();
}
StubRoutines::x86::_encoding_table_base64 = base64_encoding_table_addr();
if (VM_Version::supports_avx512_vbmi()) {
StubRoutines::x86::_shuffle_base64 = base64_shuffle_addr();
StubRoutines::x86::_lookup_lo_base64 = base64_vbmi_lookup_lo_addr();
StubRoutines::x86::_lookup_hi_base64 = base64_vbmi_lookup_hi_addr();
StubRoutines::x86::_lookup_lo_base64url = base64_vbmi_lookup_lo_url_addr();
StubRoutines::x86::_lookup_hi_base64url = base64_vbmi_lookup_hi_url_addr();
StubRoutines::x86::_pack_vec_base64 = base64_vbmi_pack_vec_addr();
StubRoutines::x86::_join_0_1_base64 = base64_vbmi_join_0_1_addr();
StubRoutines::x86::_join_1_2_base64 = base64_vbmi_join_1_2_addr();
StubRoutines::x86::_join_2_3_base64 = base64_vbmi_join_2_3_addr();
}
StubRoutines::x86::_decoding_table_base64 = base64_decoding_table_addr();
StubRoutines::_base64_encodeBlock = generate_base64_encodeBlock();
StubRoutines::_base64_decodeBlock = generate_base64_decodeBlock();
}
#ifdef COMPILER2
if (UseMultiplyToLenIntrinsic) {
StubRoutines::_multiplyToLen = generate_multiplyToLen();
}
if (UseSquareToLenIntrinsic) {
StubRoutines::_squareToLen = generate_squareToLen();
}
if (UseMulAddIntrinsic) {
StubRoutines::_mulAdd = generate_mulAdd();
}
if (VM_Version::supports_avx512_vbmi2()) {
StubRoutines::_bigIntegerRightShiftWorker = generate_bigIntegerRightShift();
StubRoutines::_bigIntegerLeftShiftWorker = generate_bigIntegerLeftShift();
}
if (UseSecondarySupersTable) {
StubRoutines::_lookup_secondary_supers_table_slow_path_stub = generate_lookup_secondary_supers_table_slow_path_stub();
if (! InlineSecondarySupersTest) {
for (int slot = 0; slot < Klass::SECONDARY_SUPERS_TABLE_SIZE; slot++) {
StubRoutines::_lookup_secondary_supers_table_stubs[slot] = generate_lookup_secondary_supers_table_stub(slot);
}
}
}
if (UseMontgomeryMultiplyIntrinsic) {
StubRoutines::_montgomeryMultiply
= CAST_FROM_FN_PTR(address, SharedRuntime::montgomery_multiply);
}
if (UseMontgomerySquareIntrinsic) {
StubRoutines::_montgomerySquare
= CAST_FROM_FN_PTR(address, SharedRuntime::montgomery_square);
}
// Load x86_64_sort library on supported hardware to enable SIMD sort and partition intrinsics
if (VM_Version::is_intel() && (VM_Version::supports_avx512dq() || VM_Version::supports_avx2())) {
void *libsimdsort = nullptr;
char ebuf_[1024];
char dll_name_simd_sort[JVM_MAXPATHLEN];
if (os::dll_locate_lib(dll_name_simd_sort, sizeof(dll_name_simd_sort), Arguments::get_dll_dir(), "simdsort")) {
libsimdsort = os::dll_load(dll_name_simd_sort, ebuf_, sizeof ebuf_);
}
// Get addresses for SIMD sort and partition routines
if (libsimdsort != nullptr) {
log_info(library)("Loaded library %s, handle " INTPTR_FORMAT, JNI_LIB_PREFIX "simdsort" JNI_LIB_SUFFIX, p2i(libsimdsort));
snprintf(ebuf_, sizeof(ebuf_), VM_Version::supports_avx512dq() ? "avx512_sort" : "avx2_sort");
StubRoutines::_array_sort = (address)os::dll_lookup(libsimdsort, ebuf_);
snprintf(ebuf_, sizeof(ebuf_), VM_Version::supports_avx512dq() ? "avx512_partition" : "avx2_partition");
StubRoutines::_array_partition = (address)os::dll_lookup(libsimdsort, ebuf_);
}
}
// Get svml stub routine addresses
void *libjsvml = nullptr;
char ebuf[1024];
char dll_name[JVM_MAXPATHLEN];
if (os::dll_locate_lib(dll_name, sizeof(dll_name), Arguments::get_dll_dir(), "jsvml")) {
libjsvml = os::dll_load(dll_name, ebuf, sizeof ebuf);
}
if (libjsvml != nullptr) {
// SVML method naming convention
// All the methods are named as __jsvml_op<T><N>_ha_<VV>
// Where:
// ha stands for high accuracy
// <T> is optional to indicate float/double
// Set to f for vector float operation
// Omitted for vector double operation
// <N> is the number of elements in the vector
// 1, 2, 4, 8, 16
// e.g. 128 bit float vector has 4 float elements
// <VV> indicates the avx/sse level:
// z0 is AVX512, l9 is AVX2, e9 is AVX1 and ex is for SSE2
// e.g. __jsvml_expf16_ha_z0 is the method for computing 16 element vector float exp using AVX 512 insns
// __jsvml_exp8_ha_z0 is the method for computing 8 element vector double exp using AVX 512 insns
log_info(library)("Loaded library %s, handle " INTPTR_FORMAT, JNI_LIB_PREFIX "jsvml" JNI_LIB_SUFFIX, p2i(libjsvml));
if (UseAVX > 2) {
for (int op = 0; op < VectorSupport::NUM_SVML_OP; op++) {
int vop = VectorSupport::VECTOR_OP_SVML_START + op;
if ((!VM_Version::supports_avx512dq()) &&
(vop == VectorSupport::VECTOR_OP_LOG || vop == VectorSupport::VECTOR_OP_LOG10 || vop == VectorSupport::VECTOR_OP_POW)) {
continue;
}
snprintf(ebuf, sizeof(ebuf), "__jsvml_%sf16_ha_z0", VectorSupport::svmlname[op]);
StubRoutines::_vector_f_math[VectorSupport::VEC_SIZE_512][op] = (address)os::dll_lookup(libjsvml, ebuf);
snprintf(ebuf, sizeof(ebuf), "__jsvml_%s8_ha_z0", VectorSupport::svmlname[op]);
StubRoutines::_vector_d_math[VectorSupport::VEC_SIZE_512][op] = (address)os::dll_lookup(libjsvml, ebuf);
}
}
const char* avx_sse_str = (UseAVX >= 2) ? "l9" : ((UseAVX == 1) ? "e9" : "ex");
for (int op = 0; op < VectorSupport::NUM_SVML_OP; op++) {
int vop = VectorSupport::VECTOR_OP_SVML_START + op;
if (vop == VectorSupport::VECTOR_OP_POW) {
continue;
}
snprintf(ebuf, sizeof(ebuf), "__jsvml_%sf4_ha_%s", VectorSupport::svmlname[op], avx_sse_str);
StubRoutines::_vector_f_math[VectorSupport::VEC_SIZE_64][op] = (address)os::dll_lookup(libjsvml, ebuf);
snprintf(ebuf, sizeof(ebuf), "__jsvml_%sf4_ha_%s", VectorSupport::svmlname[op], avx_sse_str);
StubRoutines::_vector_f_math[VectorSupport::VEC_SIZE_128][op] = (address)os::dll_lookup(libjsvml, ebuf);
snprintf(ebuf, sizeof(ebuf), "__jsvml_%sf8_ha_%s", VectorSupport::svmlname[op], avx_sse_str);
StubRoutines::_vector_f_math[VectorSupport::VEC_SIZE_256][op] = (address)os::dll_lookup(libjsvml, ebuf);
snprintf(ebuf, sizeof(ebuf), "__jsvml_%s1_ha_%s", VectorSupport::svmlname[op], avx_sse_str);
StubRoutines::_vector_d_math[VectorSupport::VEC_SIZE_64][op] = (address)os::dll_lookup(libjsvml, ebuf);
snprintf(ebuf, sizeof(ebuf), "__jsvml_%s2_ha_%s", VectorSupport::svmlname[op], avx_sse_str);
StubRoutines::_vector_d_math[VectorSupport::VEC_SIZE_128][op] = (address)os::dll_lookup(libjsvml, ebuf);
snprintf(ebuf, sizeof(ebuf), "__jsvml_%s4_ha_%s", VectorSupport::svmlname[op], avx_sse_str);
StubRoutines::_vector_d_math[VectorSupport::VEC_SIZE_256][op] = (address)os::dll_lookup(libjsvml, ebuf);
}
}
#endif // COMPILER2
#endif // COMPILER2_OR_JVMCI
}
StubGenerator::StubGenerator(CodeBuffer* code, StubsKind kind) : StubCodeGenerator(code) {
DEBUG_ONLY( _regs_in_thread = false; )
switch(kind) {
case Initial_stubs:
generate_initial_stubs();
break;
case Continuation_stubs:
generate_continuation_stubs();
break;
case Compiler_stubs:
generate_compiler_stubs();
break;
case Final_stubs:
generate_final_stubs();
break;
default:
fatal("unexpected stubs kind: %d", kind);
break;
};
}
void StubGenerator_generate(CodeBuffer* code, StubCodeGenerator::StubsKind kind) {
StubGenerator g(code, kind);
}
#undef __
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