---
src/glsl/nir/nir_lower_alu_to_scalar.c | 18 ++++++++++++++++++
1 file changed, 18 insertions(+)
diff --git a/src/glsl/nir/nir_lower_alu_to_scalar.c
b/src/glsl/nir/nir_lower_alu_to_scalar.c
index 84d4943..9313fc0 100644
--- a/src/glsl/nir/nir_lower_alu_to_scalar.c
+++ b/src/glsl/nir/nir_lower_alu_to_scalar.c
@@ -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);
--
2.5.0.400.gff86faf
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