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8181810: PPC64: Leverage extrdi for bitfield extract

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Reviewed-by: mdoerr, simonis
This commit is contained in:
Matthew Brandyberry 2017-06-22 18:33:41 +02:00 committed by Martin Doerr
parent 3c874cfeb3
commit c0a589deba
1 changed files with 39 additions and 1 deletions
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40
hotspot/src/cpu/ppc/vm/ppc.ad
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@ -1,6 +1,6 @@
//
// Copyright (c) 2011, 2017, Oracle and/or its affiliates. All rights reserved.
// Copyright (c) 2012, 2016 SAP SE. All rights reserved.
// Copyright (c) 2012, 2017 SAP SE. 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
@ -9316,6 +9316,44 @@ instruct shrP_convP2X_reg_imm6(iRegLdst dst, iRegP_N2P src1, uimmI6 src2) %{
ins_pipe(pipe_class_default);
%}
// Bitfield Extract: URShiftI + AndI
instruct andI_urShiftI_regI_immI_immIpow2minus1(iRegIdst dst, iRegIsrc src1, immI src2, immIpow2minus1 src3) %{
match(Set dst (AndI (URShiftI src1 src2) src3));
format %{ "EXTRDI $dst, $src1, shift=$src2, mask=$src3 \t// int bitfield extract" %}
size(4);
ins_encode %{
// TODO: PPC port $archOpcode(ppc64Opcode_rldicl);
int rshift = ($src2$$constant) & 0x1f;
int length = log2_long(((jlong) $src3$$constant) + 1);
if (rshift + length > 32) {
// if necessary, adjust mask to omit rotated bits.
length = 32 - rshift;
}
__ extrdi($dst$$Register, $src1$$Register, length, 64 - (rshift + length));
%}
ins_pipe(pipe_class_default);
%}
// Bitfield Extract: URShiftL + AndL
instruct andL_urShiftL_regL_immI_immLpow2minus1(iRegLdst dst, iRegLsrc src1, immI src2, immLpow2minus1 src3) %{
match(Set dst (AndL (URShiftL src1 src2) src3));
format %{ "EXTRDI $dst, $src1, shift=$src2, mask=$src3 \t// long bitfield extract" %}
size(4);
ins_encode %{
// TODO: PPC port $archOpcode(ppc64Opcode_rldicl);
int rshift = ($src2$$constant) & 0x3f;
int length = log2_long(((jlong) $src3$$constant) + 1);
if (rshift + length > 64) {
// if necessary, adjust mask to omit rotated bits.
length = 64 - rshift;
}
__ extrdi($dst$$Register, $src1$$Register, length, 64 - (rshift + length));
%}
ins_pipe(pipe_class_default);
%}
instruct sxtI_reg(iRegIdst dst, iRegIsrc src) %{
match(Set dst (ConvL2I (ConvI2L src)));