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gallivm: fix indirect addressing of temps in soa mode

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we weren't adding the soa offsets when constructing the indices
for the gather functions. That meant that we were always returning
the data in the first vertex/primitive/pixel in the SoA structure
and not correctly fetching from all structures.

Signed-off-by: Zack Rusin <zackr@vmware.com>
Reviewed-by: José Fonseca <jfonseca@vmware.com>
This commit is contained in:
Zack Rusin
2013-04-26 22:53:07 -04:00
parent 3093ac6f4f
commit f9f57312de
1 changed files with 11 additions and 0 deletions
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src/gallium/auxiliary/gallivm/lp_bld_tgsi_soa.c
+11
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@@ -1110,6 +1110,7 @@ emit_fetch_temporary(
struct gallivm_state *gallivm = bld->bld_base.base.gallivm;
LLVMBuilderRef builder = gallivm->builder;
struct lp_build_context *uint_bld = &bld_base->uint_bld;
struct lp_build_context *float_bld = &bld_base->base;
LLVMValueRef indirect_index = NULL;
LLVMValueRef res;
@@ -1128,12 +1129,22 @@ emit_fetch_temporary(
bld->bld_base.base.type.length);
LLVMValueRef index_vec; /* index into the const buffer */
LLVMValueRef temps_array;
LLVMValueRef pixel_offsets;
LLVMValueRef offsets[LP_MAX_VECTOR_LENGTH];
LLVMTypeRef float4_ptr_type;
int i;
/* build pixel offset vector: {0, 1, 2, 3, ...} */
for (i = 0; i < float_bld->type.length; i++) {
offsets[i] = lp_build_const_int32(gallivm, i);
}
pixel_offsets = LLVMConstVector(offsets, float_bld->type.length);
/* index_vec = (indirect_index * 4 + swizzle) * length */
index_vec = lp_build_shl_imm(uint_bld, indirect_index, 2);
index_vec = lp_build_add(uint_bld, index_vec, swizzle_vec);
index_vec = lp_build_mul(uint_bld, index_vec, length_vec);
index_vec = lp_build_add(uint_bld, index_vec, pixel_offsets);
/* cast temps_array pointer to float* */
float4_ptr_type = LLVMPointerType(LLVMFloatTypeInContext(bld->bld_base.base.gallivm->context), 0);