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radeonsi: Handle TGSI_SEMANTIC_FACE.

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Fixes two piglit tests using gl_FrontFacing.

Signed-off-by: Michel Dänzer <michel.daenzer@amd.com>
Reviewed-by: Tom Stellard <thomas.stellard@amd.com>
This commit is contained in:
Michel Dänzer
2012-09-25 12:41:31 +02:00
committed by Michel Dänzer
parent 691f08dbea
commit 97078b198d
2 changed files with 31 additions and 1 deletions
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src/gallium/drivers/radeonsi/radeonsi_shader.c
+27
View File
@@ -266,6 +266,33 @@ static void declare_input_fs(
return;
}
if (decl->Semantic.Name == TGSI_SEMANTIC_FACE) {
LLVMValueRef face, is_face_positive;
face = build_intrinsic(gallivm->builder,
"llvm.SI.fs.read.face",
input_type,
NULL, 0, LLVMReadNoneAttribute);
is_face_positive = LLVMBuildFCmp(gallivm->builder,
LLVMRealUGT, face,
lp_build_const_float(gallivm, 0.0f),
"");
si_shader_ctx->radeon_bld.inputs[radeon_llvm_reg_index_soa(input_index, 0)] =
LLVMBuildSelect(gallivm->builder,
is_face_positive,
lp_build_const_float(gallivm, 1.0f),
lp_build_const_float(gallivm, 0.0f),
"");
si_shader_ctx->radeon_bld.inputs[radeon_llvm_reg_index_soa(input_index, 1)] =
si_shader_ctx->radeon_bld.inputs[radeon_llvm_reg_index_soa(input_index, 2)] =
lp_build_const_float(gallivm, 0.0f);
si_shader_ctx->radeon_bld.inputs[radeon_llvm_reg_index_soa(input_index, 3)] =
lp_build_const_float(gallivm, 1.0f);
return;
}
shader->input[input_index].param_offset = shader->ninterp++;
attr_number = lp_build_const_int32(gallivm,
shader->input[input_index].param_offset);
src/gallium/drivers/radeonsi/si_state_draw.c
+4 -1
View File
@@ -110,7 +110,8 @@ static void si_pipe_shader_ps(struct pipe_context *ctx, struct si_pipe_shader *s
db_shader_control = S_02880C_Z_ORDER(V_02880C_EARLY_Z_THEN_LATE_Z);
for (i = 0; i < shader->shader.ninput; i++) {
if (shader->shader.input[i].name == TGSI_SEMANTIC_POSITION) {
switch (shader->shader.input[i].name) {
case TGSI_SEMANTIC_POSITION:
if (shader->shader.input[i].centroid) {
/* fragcoord_interp_mode will be written to
* SPI_BARYC_CNTL.POS_FLOAT_LOCATION
@@ -122,6 +123,8 @@ static void si_pipe_shader_ps(struct pipe_context *ctx, struct si_pipe_shader *s
*/
fragcoord_interp_mode = 1;
}
/* Fall through */
case TGSI_SEMANTIC_FACE:
continue;
}