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zink: flatten out ssbo/ubo variable decls in ntv 

we were using a system of block=array<uvec4> here, but we can really
just simplify this to block=array<uint> to make all the related code much
simpler

Reviewed-by: Dave Airlie <airlied@redhat.com>
Part-of: <https://gitlab.freedesktop.org/mesa/mesa/-/merge_requests/8628>
This commit is contained in:
Mike Blumenkrantz 2020-12-02 12:22:51 -05:00 committed by Marge Bot
parent 388f43c036
commit 7e5c4b4da3
1 changed files with 20 additions and 50 deletions
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70
src/gallium/drivers/zink/nir_to_spirv/nir_to_spirv.c
View File

@ -827,16 +827,16 @@ emit_bo(struct ntv_context *ctx, struct nir_variable *var)
bool ssbo = var->data.mode == nir_var_mem_ssbo;
SpvId array_type;
SpvId vec4_type = get_uvec_type(ctx, 32, 4);
SpvId uint_type = spirv_builder_type_uint(&ctx->builder, 32);
uint32_t array_size = glsl_count_attribute_slots(var->interface_type, false);
if (glsl_type_is_unsized_array(var->type))
array_type = spirv_builder_type_runtime_array(&ctx->builder, vec4_type);
array_type = spirv_builder_type_runtime_array(&ctx->builder, uint_type);
else {
SpvId array_length = emit_uint_const(ctx, 32, array_size);
array_type = spirv_builder_type_array(&ctx->builder, vec4_type,
SpvId array_length = emit_uint_const(ctx, 32, array_size * 4);
array_type = spirv_builder_type_array(&ctx->builder, uint_type,
array_length);
}
spirv_builder_emit_array_stride(&ctx->builder, array_type, 16);
spirv_builder_emit_array_stride(&ctx->builder, array_type, 4);
// wrap UBO-array in a struct
SpvId runtime_array = 0;
@ -1893,8 +1893,6 @@ emit_load_bo(struct ntv_context *ctx, nir_intrinsic_instr *intr)
/* destination type for the load */
SpvId type = get_dest_uvec_type(ctx, &intr->dest);
/* an id of the array stride in bytes */
SpvId vec4_size = emit_uint_const(ctx, 32, sizeof(uint32_t) * 4);
/* an id of an array member in bytes */
SpvId uint_size = emit_uint_const(ctx, 32, sizeof(uint32_t));
@ -1906,7 +1904,7 @@ emit_load_bo(struct ntv_context *ctx, nir_intrinsic_instr *intr)
/* our generated uniform has a memory layout like
*
* struct {
* vec4 base[array_size];
* uint base[array_size];
* };
*
* where 'array_size' is set as though every member of the ubo takes up a vec4,
@ -1919,25 +1917,18 @@ emit_load_bo(struct ntv_context *ctx, nir_intrinsic_instr *intr)
* it may be a const value or it may be dynamic in the shader
*/
SpvId offset = get_src(ctx, &intr->src[1]);
/* convert offset to an array index for 'base' to determine which vec4 to access */
SpvId vec_offset = emit_binop(ctx, SpvOpUDiv, uint_type, offset, vec4_size);
/* use the remainder to calculate the byte offset in the vec, which tells us the member
* that we're going to access
*/
SpvId vec_member_offset = emit_binop(ctx, SpvOpUDiv, uint_type,
emit_binop(ctx, SpvOpUMod, uint_type, offset, vec4_size),
uint_size);
/* calculate the byte offset in the array */
SpvId vec_offset = emit_binop(ctx, SpvOpUDiv, uint_type, offset, uint_size);
/* OpAccessChain takes an array of indices that drill into a hierarchy based on the type:
* index 0 is accessing 'base'
* index 1 is accessing 'base[index 1]'
* index 2 is accessing 'base[index 1][index 2]'
*
* we must perform the access this way in case src[1] is dynamic because there's
* no other spirv method for using an id to access a member of a composite, as
* (composite|vector)_extract both take literals
*/
for (unsigned i = 0; i < num_components; i++) {
SpvId indices[3] = { member, vec_offset, vec_member_offset };
SpvId indices[2] = { member, vec_offset };
SpvId ptr = spirv_builder_emit_access_chain(&ctx->builder, pointer_type,
bo, indices,
ARRAY_SIZE(indices));
@ -1946,12 +1937,8 @@ emit_load_bo(struct ntv_context *ctx, nir_intrinsic_instr *intr)
constituents[i] = emit_atomic(ctx, SpvOpAtomicLoad, uint_type, ptr, 0, 0);
else
constituents[i] = spirv_builder_emit_load(&ctx->builder, uint_type, ptr);
/* increment to the next vec4 member index for the next load */
vec_member_offset = emit_binop(ctx, SpvOpIAdd, uint_type, vec_member_offset, one);
if (i == 3 && num_components > 4) {
vec_offset = emit_binop(ctx, SpvOpIAdd, uint_type, vec_offset, one);
vec_member_offset = emit_uint_const(ctx, 32, 0);
}
/* increment to the next member index for the next load */
vec_offset = emit_binop(ctx, SpvOpIAdd, uint_type, vec_offset, one);
}
/* if we're loading a 64bit value, we have to reassemble all the u32 values we've loaded into u64 values
@ -2282,16 +2269,11 @@ emit_atomic_intrinsic(struct ntv_context *ctx, nir_intrinsic_instr *intr)
dest_type);
SpvId uint_type = get_uvec_type(ctx, 32, 1);
/* an id of the array stride in bytes */
SpvId vec4_size = emit_uint_const(ctx, 32, sizeof(uint32_t) * 4);
/* an id of an array member in bytes */
SpvId uint_size = emit_uint_const(ctx, 32, sizeof(uint32_t));
SpvId member = emit_uint_const(ctx, 32, 0);
SpvId offset = get_src(ctx, &intr->src[1]);
SpvId vec_offset = emit_binop(ctx, SpvOpUDiv, uint_type, offset, vec4_size);
SpvId vec_member_offset = emit_binop(ctx, SpvOpUDiv, uint_type,
emit_binop(ctx, SpvOpUMod, uint_type, offset, vec4_size),
uint_size);
SpvId indices[3] = { member, vec_offset, vec_member_offset };
SpvId vec_offset = emit_binop(ctx, SpvOpUDiv, uint_type, offset, uint_size);
SpvId indices[] = { member, vec_offset };
SpvId ptr = spirv_builder_emit_access_chain(&ctx->builder, pointer_type,
ssbo, indices,
ARRAY_SIZE(indices));
@ -2379,8 +2361,6 @@ emit_intrinsic(struct ntv_context *ctx, nir_intrinsic_instr *intr)
/* we need to grab 2x32 to fill the 64bit value */
bool is_64bit = bit_size == 64;
/* an id of the array stride in bytes */
SpvId vec4_size = emit_uint_const(ctx, 32, sizeof(uint32_t) * 4);
/* an id of an array member in bytes */
SpvId uint_size = emit_uint_const(ctx, 32, sizeof(uint32_t));
/* we grab a single array member at a time, so it's a pointer to a uint */
@ -2391,7 +2371,7 @@ emit_intrinsic(struct ntv_context *ctx, nir_intrinsic_instr *intr)
/* our generated uniform has a memory layout like
*
* struct {
* vec4 base[array_size];
* uint base[array_size];
* };
*
* where 'array_size' is set as though every member of the ubo takes up a vec4,
@ -2404,14 +2384,8 @@ emit_intrinsic(struct ntv_context *ctx, nir_intrinsic_instr *intr)
* it may be a const value or it may be dynamic in the shader
*/
SpvId offset = get_src(ctx, &intr->src[2]);
/* convert offset to an array index for 'base' to determine which vec4 to access */
SpvId vec_offset = emit_binop(ctx, SpvOpUDiv, uint_type, offset, vec4_size);
/* use the remainder to calculate the byte offset in the vec, which tells us the member
* that we're going to access
*/
SpvId vec_member_offset = emit_binop(ctx, SpvOpUDiv, uint_type,
emit_binop(ctx, SpvOpUMod, uint_type, offset, vec4_size),
uint_size);
/* calculate byte offset */
SpvId vec_offset = emit_binop(ctx, SpvOpUDiv, uint_type, offset, uint_size);
SpvId value = get_src(ctx, &intr->src[0]);
/* OpAccessChain takes an array of indices that drill into a hierarchy based on the type:
@ -2435,8 +2409,8 @@ emit_intrinsic(struct ntv_context *ctx, nir_intrinsic_instr *intr)
component_split = emit_bitcast(ctx, get_uvec_type(ctx, 32, 2), component);
for (unsigned j = 0; j < 1 + !!is_64bit; j++) {
if (j)
vec_member_offset = emit_binop(ctx, SpvOpIAdd, uint_type, vec_member_offset, one);
SpvId indices[3] = { member, vec_offset, vec_member_offset };
vec_offset = emit_binop(ctx, SpvOpIAdd, uint_type, vec_offset, one);
SpvId indices[] = { member, vec_offset };
SpvId ptr = spirv_builder_emit_access_chain(&ctx->builder, pointer_type,
bo, indices,
ARRAY_SIZE(indices));
@ -2447,14 +2421,10 @@ emit_intrinsic(struct ntv_context *ctx, nir_intrinsic_instr *intr)
write_count++;
} else if (is_64bit)
/* we're doing 32bit stores here, so we need to increment correctly here */
vec_member_offset = emit_binop(ctx, SpvOpIAdd, uint_type, vec_member_offset, one);
vec_offset = emit_binop(ctx, SpvOpIAdd, uint_type, vec_offset, one);
/* increment to the next vec4 member index for the next store */
vec_member_offset = emit_binop(ctx, SpvOpIAdd, uint_type, vec_member_offset, one);
if (i == 1 && is_64bit) {
vec_offset = emit_binop(ctx, SpvOpIAdd, uint_type, vec_offset, one);
vec_member_offset = emit_uint_const(ctx, 32, 0);
}
vec_offset = emit_binop(ctx, SpvOpIAdd, uint_type, vec_offset, one);
}
break;
}