mesa/st: Move the SYSTEM_VALUE -> TGSI_SEMANTIC map to tgsi_from_mesa.

This will let us reuse the table from nir-to-tgsi.

Reviewed-by: Marek Olšák <[email protected]>
Reviewed-by: Kristian H. Kristensen <[email protected]>
Reviewed-by: Karol Herbst <[email protected]>
Part-of: <https://gitlab.freedesktop.org/mesa/mesa/merge_requests/3506>

2 files changed, 85 insertions, 0 deletions

diff --git a/src/gallium/auxiliary/tgsi/tgsi_from_mesa.c b/src/gallium/auxiliary/tgsi/tgsi_from_mesa.c
index 19384cf4b27..72fd5c91c52 100644
--- a/src/gallium/auxiliary/tgsi/tgsi_from_mesa.c
+++ b/src/gallium/auxiliary/tgsi/tgsi_from_mesa.c
@@ -204,3 +204,85 @@ tgsi_get_gl_frag_result_semantic(gl_frag_result frag_result,
       assert(false);
    }
 }
+
+/** Map Mesa's SYSTEM_VALUE_x to TGSI_SEMANTIC_x */
+enum tgsi_semantic
+tgsi_get_sysval_semantic(unsigned sysval)
+{
+   switch (sysval) {
+   /* Vertex shader */
+   case SYSTEM_VALUE_VERTEX_ID:
+      return TGSI_SEMANTIC_VERTEXID;
+   case SYSTEM_VALUE_INSTANCE_ID:
+      return TGSI_SEMANTIC_INSTANCEID;
+   case SYSTEM_VALUE_VERTEX_ID_ZERO_BASE:
+      return TGSI_SEMANTIC_VERTEXID_NOBASE;
+   case SYSTEM_VALUE_BASE_VERTEX:
+      return TGSI_SEMANTIC_BASEVERTEX;
+   case SYSTEM_VALUE_BASE_INSTANCE:
+      return TGSI_SEMANTIC_BASEINSTANCE;
+   case SYSTEM_VALUE_DRAW_ID:
+      return TGSI_SEMANTIC_DRAWID;
+
+   /* Geometry shader */
+   case SYSTEM_VALUE_INVOCATION_ID:
+      return TGSI_SEMANTIC_INVOCATIONID;
+
+   /* Fragment shader */
+   case SYSTEM_VALUE_FRAG_COORD:
+      return TGSI_SEMANTIC_POSITION;
+   case SYSTEM_VALUE_POINT_COORD:
+      return TGSI_SEMANTIC_PCOORD;
+   case SYSTEM_VALUE_FRONT_FACE:
+      return TGSI_SEMANTIC_FACE;
+   case SYSTEM_VALUE_SAMPLE_ID:
+      return TGSI_SEMANTIC_SAMPLEID;
+   case SYSTEM_VALUE_SAMPLE_POS:
+      return TGSI_SEMANTIC_SAMPLEPOS;
+   case SYSTEM_VALUE_SAMPLE_MASK_IN:
+      return TGSI_SEMANTIC_SAMPLEMASK;
+   case SYSTEM_VALUE_HELPER_INVOCATION:
+      return TGSI_SEMANTIC_HELPER_INVOCATION;
+
+   /* Tessellation shader */
+   case SYSTEM_VALUE_TESS_COORD:
+      return TGSI_SEMANTIC_TESSCOORD;
+   case SYSTEM_VALUE_VERTICES_IN:
+      return TGSI_SEMANTIC_VERTICESIN;
+   case SYSTEM_VALUE_PRIMITIVE_ID:
+      return TGSI_SEMANTIC_PRIMID;
+   case SYSTEM_VALUE_TESS_LEVEL_OUTER:
+      return TGSI_SEMANTIC_TESSOUTER;
+   case SYSTEM_VALUE_TESS_LEVEL_INNER:
+      return TGSI_SEMANTIC_TESSINNER;
+
+   /* Compute shader */
+   case SYSTEM_VALUE_LOCAL_INVOCATION_ID:
+      return TGSI_SEMANTIC_THREAD_ID;
+   case SYSTEM_VALUE_WORK_GROUP_ID:
+      return TGSI_SEMANTIC_BLOCK_ID;
+   case SYSTEM_VALUE_NUM_WORK_GROUPS:
+      return TGSI_SEMANTIC_GRID_SIZE;
+   case SYSTEM_VALUE_LOCAL_GROUP_SIZE:
+      return TGSI_SEMANTIC_BLOCK_SIZE;
+
+   /* ARB_shader_ballot */
+   case SYSTEM_VALUE_SUBGROUP_SIZE:
+      return TGSI_SEMANTIC_SUBGROUP_SIZE;
+   case SYSTEM_VALUE_SUBGROUP_INVOCATION:
+      return TGSI_SEMANTIC_SUBGROUP_INVOCATION;
+   case SYSTEM_VALUE_SUBGROUP_EQ_MASK:
+      return TGSI_SEMANTIC_SUBGROUP_EQ_MASK;
+   case SYSTEM_VALUE_SUBGROUP_GE_MASK:
+      return TGSI_SEMANTIC_SUBGROUP_GE_MASK;
+   case SYSTEM_VALUE_SUBGROUP_GT_MASK:
+      return TGSI_SEMANTIC_SUBGROUP_GT_MASK;
+   case SYSTEM_VALUE_SUBGROUP_LE_MASK:
+      return TGSI_SEMANTIC_SUBGROUP_LE_MASK;
+   case SYSTEM_VALUE_SUBGROUP_LT_MASK:
+      return TGSI_SEMANTIC_SUBGROUP_LT_MASK;
+
+   default:
+      unreachable("Unexpected system value to TGSI");
+   }
+}
diff --git a/src/gallium/auxiliary/tgsi/tgsi_from_mesa.h b/src/gallium/auxiliary/tgsi/tgsi_from_mesa.h
index b75f37fed2e..92f08e2211a 100644
--- a/src/gallium/auxiliary/tgsi/tgsi_from_mesa.h
+++ b/src/gallium/auxiliary/tgsi/tgsi_from_mesa.h
@@ -52,6 +52,9 @@ tgsi_get_gl_frag_result_semantic(gl_frag_result frag_result,
                                  unsigned *semantic_name,
                                  unsigned *semantic_index);
 
+enum tgsi_semantic
+tgsi_get_sysval_semantic(unsigned sysval);
+
 static inline enum pipe_shader_type
 pipe_shader_type_from_mesa(gl_shader_stage stage)
 {