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zink: lower unaligned memory accesses

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Fixes `vload_half` in OpenCL

Fixes: 0288cb0a0c ("zink: lower vec8/16")
Signed-off-by: Karol Herbst <kherbst@redhat.com>
Part-of: <https://gitlab.freedesktop.org/mesa/mesa/-/merge_requests/27754>
(cherry picked from commit 2b9c0e3768)
This commit is contained in:
Karol Herbst 2024-02-22 17:36:10 +01:00 • committed by Eric Engestrom
parent 3794d15e61
commit 2166ee5c2e
2 changed files with 15 additions and 6 deletions
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2
.pick_status.json
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@ -1154,7 +1154,7 @@
"description": "zink: lower unaligned memory accesses",
"nominated": true,
"nomination_type": 1,
"resolution": 0,
"resolution": 1,
"main_sha": null,
"because_sha": "0288cb0a0c471fbef07d1dfc1cae843c5396d8e1",
"notes": null

19
src/gallium/drivers/zink/zink_compiler.c
View file

@ -5302,11 +5302,20 @@ mem_access_size_align_cb(nir_intrinsic_op intrin, uint8_t bytes,
assert(util_is_power_of_two_nonzero(align));
return (nir_mem_access_size_align){
.num_components = MIN2(bytes / (bit_size / 8), 4),
.bit_size = bit_size,
.align = bit_size / 8,
};
/* simply drop the bit_size for unaligned load/stores */
if (align < (bit_size / 8)) {
return (nir_mem_access_size_align){
.num_components = MIN2(bytes / align, 4),
.bit_size = align * 8,
.align = align,
};
} else {
return (nir_mem_access_size_align){
.num_components = MIN2(bytes / (bit_size / 8), 4),
.bit_size = bit_size,
.align = bit_size / 8,
};
}
}
static nir_mem_access_size_align