radeonsi: Fix y/z/w component values of TGSI_SEMANTIC_FOG pixel shader inputs

They are defined as constant 0.0/0.0/1.0.

Three more little piglits.

Cc: mesa-stable@lists.freedesktop.org
Reviewed-by: Alex Deucher <alexander.deucher@amd.com>

diff --git a/src/gallium/drivers/radeonsi/radeonsi_shader.c b/src/gallium/drivers/radeonsi/radeonsi_shader.c
index f1c7c6bbf9ebc4774809fb416416fbb0a07199dc..a1dec1757cb8bf2557f6cef182965e3f9517debf 100644 (file)
--- a/src/gallium/drivers/radeonsi/radeonsi_shader.c
+++ b/src/gallium/drivers/radeonsi/radeonsi_shader.c
@@ -198,6 +198,8 @@ static void declare_input_fs(
        struct si_shader *shader = &si_shader_ctx->shader->shader;
        struct lp_build_context * base =
                                &si_shader_ctx->radeon_bld.soa.bld_base.base;
+       struct lp_build_context *uint =
+                               &si_shader_ctx->radeon_bld.soa.bld_base.uint_bld;
        struct gallivm_state * gallivm = base->gallivm;
        LLVMTypeRef input_type = LLVMFloatTypeInContext(gallivm->context);
        LLVMValueRef main_fn = si_shader_ctx->radeon_bld.main_fn;
@@ -341,6 +343,22 @@ static void declare_input_fs(
                }
 
                shader->ninterp++;
+       } else if (decl->Semantic.Name == TGSI_SEMANTIC_FOG) {
+               LLVMValueRef args[4];
+
+               args[0] = uint->zero;
+               args[1] = attr_number;
+               args[2] = params;
+               args[3] = interp_param;
+               si_shader_ctx->radeon_bld.inputs[radeon_llvm_reg_index_soa(input_index, 0)] =
+                       build_intrinsic(base->gallivm->builder, intr_name,
+                                               input_type, args, args[3] ? 4 : 3,
+                                               LLVMReadNoneAttribute | LLVMNoUnwindAttribute);
+               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);
        } else {
                for (chan = 0; chan < TGSI_NUM_CHANNELS; chan++) {
                        LLVMValueRef args[4];