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nir: add some swizzle helpers

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Signed-off-by: Rob Clark <robdclark@chromium.org>
Reviewed-by: Alyssa Rosenzweig <alyssa.rosenzweig@collabora.com>
Reviewed-by: Eric Anholt <eric@anholt.net>
Part-of: <https://gitlab.freedesktop.org/mesa/mesa/-/merge_requests/4455>
This commit is contained in:
Rob Clark 2020-03-10 14:38:12 -07:00 • committed by Marge Bot
parent e78a7a1825
commit 4638a16a93
1 changed files with 20 additions and 0 deletions
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20
src/compiler/nir/nir.h
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@ -881,6 +881,26 @@ nir_dest_num_components(nir_dest dest)
return dest.is_ssa ? dest.ssa.num_components : dest.reg.reg->num_components;
}
/* Are all components the same, ie. .xxxx */
static inline bool
nir_is_same_comp_swizzle(uint8_t *swiz, unsigned nr_comp)
{
for (unsigned i = 1; i < nr_comp; i++)
if (swiz[i] != swiz[0])
return false;
return true;
}
/* Are all components sequential, ie. .yzw */
static inline bool
nir_is_sequential_comp_swizzle(uint8_t *swiz, unsigned nr_comp)
{
for (unsigned i = 1; i < nr_comp; i++)
if (swiz[i] != (swiz[0] + i))
return false;
return true;
}
void nir_src_copy(nir_src *dest, const nir_src *src, void *instr_or_if);
void nir_dest_copy(nir_dest *dest, const nir_dest *src, nir_instr *instr);