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8255838: Use 32-bit immediate movslq in macro assembler if 64-bit value fits in 32 bits on x86_64

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Reviewed-by: azeemj, kvn, redestad, thartmann
This commit is contained in:
Jorn Vernee 2020-11-04 18:10:23 +00:00
parent 94ace035a5
commit 160759ceef
1 changed files with 6 additions and 2 deletions
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8
src/hotspot/cpu/x86/macroAssembler_x86.cpp
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@ -714,8 +714,12 @@ void MacroAssembler::movptr(Register dst, ArrayAddress src) {
// src should NEVER be a real pointer. Use AddressLiteral for true pointers
void MacroAssembler::movptr(Address dst, intptr_t src) {
mov64(rscratch1, src);
movq(dst, rscratch1);
if (is_simm32(src)) {
movptr(dst, checked_cast<int32_t>(src));
} else {
mov64(rscratch1, src);
movq(dst, rscratch1);
}
}
// These are mostly for initializing NULL