tgsi: split tgsi_util_get_texture_coord_dim() function into two

It was kind of overloaded, returning two different things.  Now get
the index of the shadow reference src register with a new
tgsi_util_get_shadow_ref_src_index() function.

To verify the new code, I added some temp/debug code which looped
over all TGSI_TEXTURE_x values, calling the old function and new and
checking that the returned indexes matched.

Also tested piglit "shadow" tests with softpipe/llvmpipe.
No testing of ilo and radeonsi changes.

Reviewed-by: Dave Airlie <[email protected]>

1 files changed, 3 insertions, 4 deletions

diff --git a/src/gallium/drivers/radeonsi/si_shader.c b/src/gallium/drivers/radeonsi/si_shader.c
index 9eb531f8d80..4176e9f1ce5 100644
--- a/src/gallium/drivers/radeonsi/si_shader.c
+++ b/src/gallium/drivers/radeonsi/si_shader.c
@@ -2874,8 +2874,7 @@ static LLVMValueRef image_fetch_coords(
 	struct gallivm_state *gallivm = bld_base->base.gallivm;
 	LLVMBuilderRef builder = gallivm->builder;
 	unsigned target = inst->Memory.Texture;
-	int sample;
-	unsigned num_coords = tgsi_util_get_texture_coord_dim(target, &sample);
+	unsigned num_coords = tgsi_util_get_texture_coord_dim(target);
 	LLVMValueRef coords[4];
 	LLVMValueRef tmp;
 	int chan;
@@ -3387,8 +3386,8 @@ static void tex_fetch_args(
 	unsigned target = inst->Texture.Texture;
 	LLVMValueRef coords[5], derivs[6];
 	LLVMValueRef address[16];
-	int ref_pos;
-	unsigned num_coords = tgsi_util_get_texture_coord_dim(target, &ref_pos);
+	unsigned num_coords = tgsi_util_get_texture_coord_dim(target);
+	int ref_pos = tgsi_util_get_shadow_ref_src_index(target);
 	unsigned count = 0;
 	unsigned chan;
 	unsigned num_deriv_channels = 0;