RGBCube/serenity
1
Fork 0
mirror of https://github.com/RGBCube/serenity synced 2025-07-25 18:17:44 +00:00
Code Issues Activity Actions

LibJS/JIT: Add Assembler::jump_if_equal()

Browse source 
And also factor out cmp() so we don't have to repeat it.
This commit is contained in:
Andreas Kling 2023-10-17 18:03:17 +02:00
parent a7bad26b63
commit 814b07a9c2
1 changed files with 17 additions and 2 deletions
Download patch file Download diff file Expand all files Collapse all files

19
Userland/Libraries/LibJS/JIT/Assembler.h
View file

@ -231,9 +231,8 @@ struct Assembler {
jump(true_target);
}
void jump_if_not_equal(Operand lhs, Operand rhs, Label& label)
void cmp(Operand lhs, Operand rhs)
{
// cmp lhs, rhs
if (lhs.type == Operand::Type::Reg && rhs.type == Operand::Type::Reg) {
emit8(0x48
| ((to_underlying(lhs.reg) >= 8) ? 1 << 2 : 0)
@ -248,6 +247,22 @@ struct Assembler {
} else {
VERIFY_NOT_REACHED();
}
}
void jump_if_equal(Operand lhs, Operand rhs, Label& label)
{
cmp(lhs, rhs);
// je label (RIP-relative 32-bit offset)
emit8(0x0f);
emit8(0x84);
emit32(0xdeadbeef);
label.offset_in_instruction_stream = m_output.size();
}
void jump_if_not_equal(Operand lhs, Operand rhs, Label& label)
{
cmp(lhs, rhs);
// jne label (RIP-relative 32-bit offset)
emit8(0x0f);