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nak: sin() and cos() require we divide by 2pi

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Part-of: <https://gitlab.freedesktop.org/mesa/mesa/-/merge_requests/24998>
This commit is contained in:
Faith Ekstrand
2023-04-23 03:16:11 -05:00
committed by Marge Bot
parent a6e1167a83
commit dc3b2c7d10
1 changed files with 18 additions and 2 deletions
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src/nouveau/compiler/nak_from_nir.rs
+18 -2
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@@ -205,7 +205,15 @@ impl<'a> ShaderFromNir<'a> {
self.instrs.push(Instr::new_fadd(dst, srcs[0], srcs[1]));
}
nir_op_fcos => {
self.instrs.push(Instr::new_mufu(dst, MuFuOp::Cos, srcs[0]));
let frac_1_2pi = 1.0 / (2.0 * std::f32::consts::PI);
let tmp = self.alloc_ssa(RegFile::GPR);
self.instrs.push(Instr::new_fmul(
tmp.into(),
srcs[0],
Src::new_imm_u32(frac_1_2pi.to_bits()),
));
self.instrs
.push(Instr::new_mufu(dst, MuFuOp::Cos, tmp.into()));
}
nir_op_feq => {
self.instrs.push(Instr::new_fsetp(
@@ -316,7 +324,15 @@ impl<'a> ShaderFromNir<'a> {
));
}
nir_op_fsin => {
self.instrs.push(Instr::new_mufu(dst, MuFuOp::Sin, srcs[0]));
let frac_1_2pi = 1.0 / (2.0 * std::f32::consts::PI);
let tmp = self.alloc_ssa(RegFile::GPR);
self.instrs.push(Instr::new_fmul(
tmp.into(),
srcs[0],
Src::new_imm_u32(frac_1_2pi.to_bits()),
));
self.instrs
.push(Instr::new_mufu(dst, MuFuOp::Sin, tmp.into()));
}
nir_op_fsqrt => {
self.instrs