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Optimise pop reg

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This commit is contained in:
Fabian 2020-12-31 19:14:29 -06:00
parent c5cd93678e
commit b23c4a9db2
1 changed files with 8 additions and 8 deletions
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16
src/rust/codegen.rs
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@ -960,21 +960,21 @@ pub fn gen_pop32s_ss16(ctx: &mut JitContext) {
}
pub fn gen_pop32s_ss32(ctx: &mut JitContext) {
// esp = reg32s[ESP]
gen_get_reg32(ctx, regs::ESP);
// result = safe_read32s(segment_offsets[SS] + esp) (or just esp if has_flat_segmentation)
if !ctx.cpu.has_flat_segmentation() {
gen_get_reg32(ctx, regs::ESP);
ctx.builder
.instruction_body
.load_aligned_i32(global_pointers::get_seg_offset(regs::SS));
ctx.builder.instruction_body.add_i32();
let address_local = ctx.builder.set_new_local();
gen_safe_read32(ctx, &address_local);
ctx.builder.free_local(address_local);
}
else {
let reg = ctx.register_locals[regs::ESP as usize].unsafe_clone();
gen_safe_read32(ctx, &reg);
}
let address_local = ctx.builder.set_new_local();
gen_safe_read32(ctx, &address_local);
ctx.builder.free_local(address_local);
// reg32s[ESP] = esp + 4;
gen_get_reg32(ctx, regs::ESP);
ctx.builder.instruction_body.const_i32(4);
ctx.builder.instruction_body.add_i32();