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LibJS/JIT: Add a fast path for floating point comparisons

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This commit is contained in:
Stephan Vedder 2023-11-14 16:46:10 +01:00 • committed by Andreas Kling
parent 4164af2ca4
commit 32352aa729
3 changed files with 107 additions and 48 deletions
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9
Userland/Libraries/LibJIT/X86_64/Assembler.h
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@ -144,6 +144,11 @@ struct X86_64Assembler {
Unordered = ParityEven,
NotUnordered = ParityOdd,
Below = UnsignedLessThan,
BelowOrEqual = UnsignedLessThanOrEqualTo,
Above = UnsignedGreaterThan,
AboveOrEqual = UnsignedGreaterThanOrEqualTo,
};
static constexpr u8 encode_reg(Reg reg)
@ -529,10 +534,10 @@ struct X86_64Assembler {
} else if (lhs.type == Operand::Type::FReg && (rhs.type == Operand::Type::FReg || rhs.type == Operand::Type::Mem64BaseAndOffset)) {
// ucomisd lhs, rhs
emit8(0x66);
emit_rex_for_mr(lhs, rhs, REX_W::No);
emit_rex_for_rm(lhs, rhs, REX_W::No);
emit8(0x0f);
emit8(0x2e);
emit_modrm_mr(lhs, rhs);
emit_modrm_rm(lhs, rhs);
} else {
VERIFY_NOT_REACHED();
}