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nak/sm20: Improve folding of ffma and dfma

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Part-of: <https://gitlab.freedesktop.org/mesa/mesa/-/merge_requests/34619>
This commit is contained in:
Faith Ekstrand 2025-04-19 11:01:19 -05:00
parent 9855467ed0
commit 142fb563c4
1 changed files with 10 additions and 2 deletions
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12
src/nouveau/compiler/nak/sm20.rs
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@ -598,7 +598,11 @@ impl SM20Op for OpFFma {
{ {
b.copy_alu_src(src1, GPR, SrcType::F32); b.copy_alu_src(src1, GPR, SrcType::F32);
} }
b.copy_alu_src_if_not_reg(src2, GPR, SrcType::F32); if src_is_reg(src1, GPR) {
b.copy_alu_src_if_imm(src2, GPR, SrcType::ALU);
} else {
b.copy_alu_src_if_not_reg(src2, GPR, SrcType::I32);
}
} }
fn encode(&self, e: &mut SM20Encoder<'_>) { fn encode(&self, e: &mut SM20Encoder<'_>) {
@ -925,7 +929,11 @@ impl SM20Op for OpDFma {
swap_srcs_if_not_reg(src0, src1, GPR); swap_srcs_if_not_reg(src0, src1, GPR);
b.copy_alu_src_if_not_reg(src0, GPR, SrcType::F64); b.copy_alu_src_if_not_reg(src0, GPR, SrcType::F64);
b.copy_alu_src_if_f20_overflow(src1, GPR, SrcType::F64); b.copy_alu_src_if_f20_overflow(src1, GPR, SrcType::F64);
b.copy_alu_src_if_not_reg(src2, GPR, SrcType::F64); if src_is_reg(src1, GPR) {
b.copy_alu_src_if_imm(src2, GPR, SrcType::ALU);
} else {
b.copy_alu_src_if_not_reg(src2, GPR, SrcType::I32);
}
} }
fn encode(&self, e: &mut SM20Encoder<'_>) { fn encode(&self, e: &mut SM20Encoder<'_>) {