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8299323: Allow extended registers for cmpw

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Reviewed-by: sviswanathan, kvn
This commit is contained in:
Erik Österlund 2023-01-17 12:16:05 +00:00
parent 07d5753172
commit b7fb8ef89e
1 changed files with 3 additions and 2 deletions
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5
src/hotspot/cpu/x86/assembler_x86.cpp
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@ -1763,8 +1763,9 @@ void Assembler::cmpl_imm32(Address dst, int32_t imm32) {
void Assembler::cmpw(Address dst, int imm16) { void Assembler::cmpw(Address dst, int imm16) {
InstructionMark im(this); InstructionMark im(this);
assert(!dst.base_needs_rex() && !dst.index_needs_rex(), "no extended registers"); emit_int8(0x66);
emit_int16(0x66, (unsigned char)0x81); prefix(dst);
emit_int8((unsigned char)0x81);
emit_operand(rdi, dst, 2); emit_operand(rdi, dst, 2);
emit_int16(imm16); emit_int16(imm16);
} }