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consider add/inc/dec; jbe optimised in its current form

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Fabian 2022-11-05 15:09:42 -06:00
parent 37841eb0c9
commit e9a3fc5b00
1 changed files with 11 additions and 1 deletions
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12
src/rust/codegen.rs
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@ -2044,7 +2044,17 @@ pub fn gen_test_be(ctx: &mut JitContext, negate: ConditionNegate) {
gen_profiler_stat_increment(ctx.builder, profiler::stat::CONDITION_OPTIMISED);
gen_getzf(ctx, negate);
},
_ => {
&Instruction::Add { .. } | &Instruction::Sub { is_dec: true, .. } => {
gen_profiler_stat_increment(ctx.builder, profiler::stat::CONDITION_OPTIMISED);
// not the best code generation, but reasonable for this fairly uncommon case
gen_getcf(ctx, ConditionNegate::False);
gen_getzf(ctx, ConditionNegate::False);
ctx.builder.or_i32();
if negate == ConditionNegate::True {
ctx.builder.eqz_i32();
}
},
&Instruction::Other => {
gen_profiler_stat_increment(ctx.builder, profiler::stat::CONDITION_UNOPTIMISED);
gen_getcf(ctx, ConditionNegate::False);
gen_getzf(ctx, ConditionNegate::False);