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optimise sub; jl

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Fabian 2022-11-04 17:55:57 -06:00
parent 949081837b
commit 228934d616
1 changed files with 43 additions and 0 deletions
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43
src/rust/codegen.rs
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@ -2039,6 +2039,49 @@ pub fn gen_test_l(ctx: &mut JitContext, negate: ConditionNegate) {
ctx.builder.lt_i32();
}
},
Instruction::Sub {
opsize,
dest: _,
source,
} => {
gen_profiler_stat_increment(ctx.builder, profiler::stat::CONDITION_OPTIMISED);
gen_get_last_op1(ctx.builder, &ctx.previous_instruction);
if *opsize == OPSIZE_8 || *opsize == OPSIZE_16 {
ctx.builder
.const_i32(if *opsize == OPSIZE_8 { 24 } else { 16 });
ctx.builder.shl_i32();
}
match (opsize, source) {
(&OPSIZE_32, InstructionOperand::WasmLocal(l)) => ctx.builder.get_local(l),
(_, &InstructionOperand::Immediate(i)) => ctx.builder.const_i32(
i << if *opsize == OPSIZE_32 {
0
}
else if *opsize == OPSIZE_16 {
16
}
else {
24
},
),
_ => {
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 { 24 } else { 16 });
ctx.builder.shl_i32();
}
},
}
if negate == ConditionNegate::True {
ctx.builder.ge_i32();
}
else {
ctx.builder.lt_i32();
}
},
_ => {
gen_profiler_stat_increment(ctx.builder, profiler::stat::CONDITION_UNOPTIMISED);
gen_getsf(ctx, ConditionNegate::False);