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optimise sub; jbe

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Fabian 2022-11-04 15:28:17 -06:00
parent 7d6a3c67e4
commit 949081837b
1 changed files with 14 additions and 9 deletions
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23
src/rust/codegen.rs
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@ -1939,19 +1939,24 @@ pub fn gen_test_be(ctx: &mut JitContext, negate: ConditionNegate) {
Instruction::Sub {
opsize,
dest: _,
source: _,
source,
} => {
gen_profiler_stat_increment(ctx.builder, profiler::stat::CONDITION_OPTIMISED);
gen_get_last_op1(ctx.builder, &ctx.previous_instruction);
// Note: Can only use register if it's different from dest (being lazy here and just using op1 and result)
gen_get_last_op1(ctx.builder, &ctx.previous_instruction);
gen_get_last_result(ctx.builder, &ctx.previous_instruction);
ctx.builder.sub_i32();
if *opsize == OPSIZE_8 || *opsize == OPSIZE_16 {
ctx.builder
.const_i32(if *opsize == OPSIZE_8 { 0xFF } else { 0xFFFF });
ctx.builder.and_i32();
match (opsize, source) {
(&OPSIZE_32, InstructionOperand::WasmLocal(l)) => ctx.builder.get_local(l),
(_, &InstructionOperand::Immediate(i)) => ctx.builder.const_i32(i),
_ => {
gen_get_last_op1(ctx.builder, &ctx.previous_instruction);
gen_get_last_result(ctx.builder, &ctx.previous_instruction);
ctx.builder.sub_i32();
if *opsize == OPSIZE_8 || *opsize == OPSIZE_16 {
ctx.builder
.const_i32(if *opsize == OPSIZE_8 { 0xFF } else { 0xFFFF });
ctx.builder.and_i32();
}
},
}
if negate == ConditionNegate::True {