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optimise getsf

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This commit is contained in:
Fabian 2022-11-04 13:18:34 -06:00
parent db65dd352d
commit 19b2771c40
1 changed files with 23 additions and 15 deletions
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38
src/rust/codegen.rs
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@ -1737,26 +1737,32 @@ pub fn gen_getcf_unoptimised(ctx: &mut JitContext) {
ctx.builder.free_local(sub_mask);
}
pub fn gen_getsf(ctx: &mut JitContext) {
pub fn gen_getsf(ctx: &mut JitContext, negate: ConditionNegate) {
match &ctx.previous_instruction {
Instruction::Cmp { opsize, .. }
| Instruction::Sub { opsize, .. }
| Instruction::Arithmetic { opsize, .. } => {
let &opsize = opsize;
gen_profiler_stat_increment(ctx.builder, profiler::stat::CONDITION_OPTIMISED);
// TODO:
// x >= 0 for ConditionNegate::True
gen_get_last_result(ctx.builder, &ctx.previous_instruction);
ctx.builder.const_i32(if opsize == OPSIZE_32 {
0x8000_0000u32 as i32
}
else if opsize == OPSIZE_16 {
0x8000
if opsize == OPSIZE_32 {
ctx.builder.const_i32(0);
if negate == ConditionNegate::True {
ctx.builder.ge_i32();
}
else {
ctx.builder.lt_i32();
}
}
else {
0x80
});
ctx.builder.and_i32();
// TODO: use register (see get_last_result)
ctx.builder
.const_i32(if opsize == OPSIZE_16 { 0x8000 } else { 0x80 });
ctx.builder.and_i32();
if negate == ConditionNegate::True {
ctx.builder.eqz_i32();
}
}
},
Instruction::Other => {
gen_profiler_stat_increment(ctx.builder, profiler::stat::CONDITION_UNOPTIMISED);
@ -1778,6 +1784,9 @@ pub fn gen_getsf(ctx: &mut JitContext) {
ctx.builder.and_i32();
}
ctx.builder.block_end();
if negate == ConditionNegate::True {
ctx.builder.eqz_i32();
}
},
}
}
@ -2007,7 +2016,7 @@ pub fn gen_test_l(ctx: &mut JitContext, negate: ConditionNegate) {
},
_ => {
gen_profiler_stat_increment(ctx.builder, profiler::stat::CONDITION_UNOPTIMISED);
gen_getsf(ctx);
gen_getsf(ctx, ConditionNegate::False);
ctx.builder.eqz_i32();
gen_getof(ctx);
ctx.builder.eqz_i32();
@ -2254,11 +2263,10 @@ pub fn gen_condition_fn(ctx: &mut JitContext, condition: u8) {
gen_test_be(ctx, ConditionNegate::True);
},
0x8 => {
gen_getsf(ctx);
gen_getsf(ctx, ConditionNegate::False);
},
0x9 => {
gen_getsf(ctx);
ctx.builder.eqz_i32();
gen_getsf(ctx, ConditionNegate::True);
},
0xA => ctx.builder.call_fn0_ret("test_p"),
0xB => ctx.builder.call_fn0_ret("test_np"),