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panvk: Lower dynamic push_constant loads in desc_copy logic

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We're about to drop the dynamic push_constant lowering pass,
but first we must patch all the bits relying on it.

Signed-off-by: Boris Brezillon <boris.brezillon@collabora.com>
Acked-by: Chia-I Wu <olvaffe@gmail.com>
Reviewed-by: Mary Guillemard <mary.guillemard@collabora.com>
Reviewed-by: Lars-Ivar Hesselberg Simonsen <lars-ivar.simonsen@arm.com>
Part-of: <https://gitlab.freedesktop.org/mesa/mesa/-/merge_requests/32415>
This commit is contained in:
Boris Brezillon
2024-12-06 12:57:05 +01:00
committed by Marge Bot
parent 3d5ddaaffa
commit 58d8d4ce7b
1 changed files with 38 additions and 9 deletions
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47
src/panfrost/vulkan/bifrost/panvk_vX_meta_desc_copy.c
View File

@@ -35,17 +35,46 @@ struct pan_nir_desc_copy_info {
#define get_input_field(b, name) \
nir_load_push_constant( \
b, 1, sizeof(((struct pan_nir_desc_copy_info *)0)->name) * 8, \
nir_imm_int(b, 0), \
.base = offsetof(struct pan_nir_desc_copy_info, name), \
.range = sizeof(((struct pan_nir_desc_copy_info *)0)->name))
nir_imm_int(b, offsetof(struct pan_nir_desc_copy_info, name)))
static nir_def *
get_array_entry(nir_builder *b, unsigned array_offset, unsigned array_size,
unsigned array_stride, nir_def *idx)
{
assert(array_size > 0);
assert(array_stride == 4 || array_stride == 8);
STACK_ARRAY(nir_def *, lut, array_size);
/* First we populate a lookup table covering the whole array. */
for (unsigned i = 0; i < array_size; i++) {
lut[i] = nir_load_push_constant(
b, 1, array_stride * 8,
nir_imm_int(b, (i * array_stride) + array_offset));
}
/* Then we test each bit in the index starting from the MSB of the biggest
* valid index in the array and select the entry accordingly. */
for (unsigned lut_stride = BITFIELD_BIT(util_last_bit(array_size - 1) - 1);
lut_stride > 0; lut_stride >>= 1) {
nir_def *bit_is_set = nir_i2b(b, nir_iand_imm(b, idx, lut_stride));
for (unsigned i = 0; i < lut_stride && i + lut_stride < array_size; i++)
lut[i] = nir_bcsel(b, bit_is_set, lut[i + lut_stride], lut[i]);
}
nir_def *result = lut[0];
STACK_ARRAY_FINISH(lut);
return result;
}
#define get_input_array_slot(b, name, index) \
nir_load_push_constant( \
b, 1, sizeof(((struct pan_nir_desc_copy_info *)0)->name[0]) * 8, \
nir_imul_imm(b, index, \
sizeof(((struct pan_nir_desc_copy_info *)0)->name[0])), \
.base = offsetof(struct pan_nir_desc_copy_info, name), \
.range = sizeof(((struct pan_nir_desc_copy_info *)0)->name))
get_array_entry(b, offsetof(struct pan_nir_desc_copy_info, name), \
ARRAY_SIZE(((struct pan_nir_desc_copy_info *)0)->name), \
sizeof(((struct pan_nir_desc_copy_info *)0)->name[0]), \
index)
static void
extract_desc_info_from_handle(nir_builder *b, nir_def *handle, nir_def **table,