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nir/lower_alu_to_scalar: Add support for nir_op_fdph

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Reviewed-by: Matt Turner <mattst88@gmail.com>
Reviewed-by: Kenneth Graunke <kenneth@whitecape.org>
This commit is contained in:
Jason Ekstrand
2015-09-22 17:29:49 -07:00
parent 2e5423ad63
commit 999ff3c77d
1 changed files with 18 additions and 0 deletions
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src/glsl/nir/nir_lower_alu_to_scalar.c
+18
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@@ -112,6 +112,24 @@ lower_alu_instr_scalar(nir_alu_instr *instr, nir_builder *b)
*/
return;
case nir_op_fdph: {
nir_ssa_def *sum[4];
for (unsigned i = 0; i < 3; i++) {
sum[i] = nir_fmul(b, nir_channel(b, instr->src[0].src.ssa,
instr->src[0].swizzle[i]),
nir_channel(b, instr->src[1].src.ssa,
instr->src[1].swizzle[i]));
}
sum[3] = nir_channel(b, instr->src[1].src.ssa, instr->src[1].swizzle[3]);
nir_ssa_def *val = nir_fadd(b, nir_fadd(b, sum[0], sum[1]),
nir_fadd(b, sum[2], sum[3]));
nir_ssa_def_rewrite_uses(&instr->dest.dest.ssa, nir_src_for_ssa(val));
nir_instr_remove(&instr->instr);
return;
}
LOWER_REDUCTION(nir_op_fdot, nir_op_fmul, nir_op_fadd);
LOWER_REDUCTION(nir_op_ball_fequal, nir_op_feq, nir_op_iand);
LOWER_REDUCTION(nir_op_ball_iequal, nir_op_ieq, nir_op_iand);