From: Dave Airlie <airl...@redhat.com>
On r600 this needs to subtract 9 due to texcoord interactions.
Signed-off-by: Dave Airlie <airl...@redhat.com>
---
src/gallium/drivers/r600/r600_shader.c | 38 ++++++++++++++++++++++++++++++++++
src/gallium/drivers/r600/r600_shader.h | 1 +
2 files changed, 39 insertions(+)
diff --git a/src/gallium/drivers/r600/r600_shader.c
b/src/gallium/drivers/r600/r600_shader.c
index b7d21fb..8e50cc3 100644
--- a/src/gallium/drivers/r600/r600_shader.c
+++ b/src/gallium/drivers/r600/r600_shader.c
@@ -568,6 +568,44 @@ static int r600_spi_sid(struct r600_shader_io * io)
return index;
};
+/* we need this to get a common lds index for vs/tcs/tes input/outputs */
+int r600_get_lds_unique_index(unsigned semantic_name, unsigned index)
+{
+ switch (semantic_name) {
+ case TGSI_SEMANTIC_POSITION:
+ return 0;
+ case TGSI_SEMANTIC_PSIZE:
+ return 1;
+ case TGSI_SEMANTIC_CLIPDIST:
+ assert(index <= 1);
+ return 2 + index;
+ case TGSI_SEMANTIC_GENERIC:
+ if (index <= 63-4)
+ return 4 + index - 9;
+ else
+ /* same explanation as in the default statement,
+ * the only user hitting this is st/nine.
+ */
+ return 0;
+
+ /* patch indices are completely separate and thus start from 0 */
+ case TGSI_SEMANTIC_TESSOUTER:
+ return 0;
+ case TGSI_SEMANTIC_TESSINNER:
+ return 1;
+ case TGSI_SEMANTIC_PATCH:
+ return 2 + index;
+
+ default:
+ /* Don't fail here. The result of this function is only used
+ * for LS, TCS, TES, and GS, where legacy GL semantics can't
+ * occur, but this function is called for all vertex shaders
+ * before it's known whether LS will be compiled or not.
+ */
+ return 0;
+ }
+}
+
/* turn input into interpolate on EG */
static int evergreen_interp_input(struct r600_shader_ctx *ctx, int index)
{
diff --git a/src/gallium/drivers/r600/r600_shader.h
b/src/gallium/drivers/r600/r600_shader.h
index 398e7da..f5b1c4b 100644
--- a/src/gallium/drivers/r600/r600_shader.h
+++ b/src/gallium/drivers/r600/r600_shader.h
@@ -154,6 +154,7 @@ struct r600_pipe_shader {
TGSI_INTERPOLATE_LOC_CENTER/SAMPLE/COUNT. Other input values return -1. */
int eg_get_interpolator_index(unsigned interpolate, unsigned location);
+int r600_get_lds_unique_index(unsigned semantic_name, unsigned index);
#ifdef __cplusplus
} // extern "C"
--
2.5.0
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