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nir/builder: Add a helper for building fdot instructions 

Reviewed-by: Rob Clark <robdclark@gmail.com>
This commit is contained in:
Jason Ekstrand 2016-03-25 10:34:17 -07:00
parent da422663a6
commit 77e2ac1da7
1 changed files with 17 additions and 0 deletions
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17
src/compiler/nir/nir_builder.h
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@ -305,6 +305,23 @@ nir_swizzle(nir_builder *build, nir_ssa_def *src, unsigned swiz[4],
nir_imov_alu(build, alu_src, num_components);
}
/* Selects the right fdot given the number of components in each source. */
static inline nir_ssa_def *
nir_fdot(nir_builder *build, nir_ssa_def *src0, nir_ssa_def *src1)
{
assert(src0->num_components == src1->num_components);
switch (src0->num_components) {
case 1: return nir_fmul(build, src0, src1);
case 2: return nir_fdot2(build, src0, src1);
case 3: return nir_fdot3(build, src0, src1);
case 4: return nir_fdot4(build, src0, src1);
default:
unreachable("bad component size");
}
return NULL;
}
static inline nir_ssa_def *
nir_channel(nir_builder *b, nir_ssa_def *def, unsigned c)
{