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nvk/mme: Add helpers for masked scratch updates

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Part-of: <https://gitlab.freedesktop.org/mesa/mesa/-/merge_requests/30703>
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Faith Ekstrand 2024-08-15 10:40:40 -05:00 • committed by Marge Bot
parent 954f274c19
commit 5a2e25db69
1 changed files with 32 additions and 0 deletions
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32
src/nouveau/vulkan/nvk_mme.h
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@ -121,6 +121,38 @@ _nvk_mme_load_to_scratch(struct mme_builder *b, enum nvk_mme_scratch scratch)
#define nvk_mme_load_to_scratch(b, S) \
_nvk_mme_load_to_scratch(b, NVK_MME_SCRATCH_##S)
static inline uint32_t
nvk_mme_val_mask(uint16_t val, uint16_t mask)
{
/* If there are bits in val which aren't in mask, it's probably a
* programming error on the CPU side. nvk_mme_set_masked() will still
* work in this case but it's worth an assert.
*/
assert(!(val & ~mask));
return ((uint32_t)val) | (((uint32_t)mask) << 16);
}
/* This is a common pattern in NVK. The input val_mask is a value plus a mask
* where the top 16 bits are mask and the bottom 16 bits are data. src is
* copied and the bits in the mask are replaced by the corresponding value
* bits in val_mask.
*/
static inline struct mme_value
nvk_mme_set_masked(struct mme_builder *b, struct mme_value src,
struct mme_value val_mask)
{
struct mme_value mask = mme_merge(b, mme_zero(), val_mask, 0, 16, 16);
struct mme_value val = mme_and_not(b, src, mask);
/* Re-use the mask reg for val_mask & mask */
mme_and_to(b, mask, val_mask, mask);
mme_or_to(b, val, val, mask);
mme_free_reg(b, mask);
return val;
}
static void
_nvk_mme_spill(struct mme_builder *b, enum nvk_mme_scratch scratch,
struct mme_value val)