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ail: generalize ail_space_bits

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for full twiddling.

Signed-off-by: Alyssa Rosenzweig <alyssa@rosenzweig.io>
Part-of: <https://gitlab.freedesktop.org/mesa/mesa/-/merge_requests/34585>
This commit is contained in:
Alyssa Rosenzweig 2025-02-24 18:05:19 -05:00 • committed by Marge Bot
parent e5006dc6ae
commit 6fdad684da
1 changed files with 11 additions and 3 deletions
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14
src/asahi/layout/layout.h
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@ -247,10 +247,18 @@ ail_get_linear_pixel_B(const struct ail_layout *layout, ASSERTED unsigned level,
static inline uint32_t
ail_space_bits(unsigned x)
{
assert(x < 128 && "offset must be inside the tile");
uint32_t accum = 0;
return ((x & 1) << 0) | ((x & 2) << 1) | ((x & 4) << 2) | ((x & 8) << 3) |
((x & 16) << 4) | ((x & 32) << 5) | ((x & 64) << 6);
/* With fully twiddled images, we can have up to 16384x16384 tiles,
* justifying stopping the loop at 14.
*/
assert(x < (1 << 14) && "offset must be inside the tile");
for (unsigned i = 0; i < 14; ++i) {
accum |= (x & (1 << i)) << i;
}
return accum;
}
#define MOD_POT(x, y) (x) & ((y) - 1)