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pan/midgard: Add mir_simple_swizzle helper

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Checks for x/xy/xyz/xyzw style swizzles (slightly more general but you
get the idea).

Signed-off-by: Alyssa Rosenzweig <alyssa.rosenzweig@collabora.com>
This commit is contained in:
Alyssa Rosenzweig 2019-07-23 20:02:06 -07:00
parent 63385a3fdb
commit b8caaa3000
1 changed files with 15 additions and 0 deletions
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15
src/panfrost/midgard/helpers.h
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@ -303,4 +303,19 @@ vector_alu_apply_swizzle(unsigned src, unsigned swizzle)
return vector_alu_srco_unsigned(s);
}
/* Checks for an xyzw.. swizzle, given a mask */
static inline bool
mir_is_simple_swizzle(unsigned swizzle, unsigned mask)
{
for (unsigned i = 0; i < 16; ++i) {
if (!(mask & (1 << i))) continue;
if (((swizzle >> (2 * i)) & 0x3) != i)
return false;
}
return true;
}
#endif