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optimise cmp reg, reg/imm; jz

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Fabian 2022-11-04 13:44:25 -06:00
parent 19b2771c40
commit d629984627
1 changed files with 37 additions and 1 deletions
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38
src/rust/codegen.rs
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@ -1592,9 +1592,45 @@ pub enum ConditionNegate {
pub fn gen_getzf(ctx: &mut JitContext, negate: ConditionNegate) {
match &ctx.previous_instruction {
Instruction::Cmp {
dest: InstructionOperandDest::WasmLocal(dest),
source: InstructionOperand::WasmLocal(source),
opsize: OPSIZE_32,
} => {
gen_profiler_stat_increment(ctx.builder, profiler::stat::CONDITION_OPTIMISED);
ctx.builder.get_local(dest);
ctx.builder.get_local(source);
if negate == ConditionNegate::False {
ctx.builder.eq_i32();
}
else {
ctx.builder.ne_i32();
}
},
Instruction::Cmp {
dest: InstructionOperandDest::WasmLocal(dest),
source: InstructionOperand::Immediate(i),
opsize: OPSIZE_32,
} => {
gen_profiler_stat_increment(ctx.builder, profiler::stat::CONDITION_OPTIMISED);
ctx.builder.get_local(dest);
if *i != 0 {
ctx.builder.const_i32(*i);
if negate == ConditionNegate::False {
ctx.builder.eq_i32();
}
else {
ctx.builder.ne_i32();
}
}
else {
if negate == ConditionNegate::False {
ctx.builder.eqz_i32();
}
}
},
Instruction::Cmp { .. } | Instruction::Sub { .. } => {
gen_profiler_stat_increment(ctx.builder, profiler::stat::CONDITION_OPTIMISED);
// TODO: Could use eq(local, local) for cmp x, y
gen_get_last_result(ctx.builder, &ctx.previous_instruction);
if negate == ConditionNegate::False {
ctx.builder.eqz_i32();