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 <marek.olsak@amd.com>
Reviewed-by: Kristian H. Kristensen <hoegsberg@google.com>
Reviewed-by: Karol Herbst <kherbst@redhat.com>
Part-of: <https://gitlab.freedesktop.org/mesa/mesa/merge_requests/3506>

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");
+   }
+}

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)
 {

src/mesa/state_tracker/st_glsl_to_tgsi.cpp

@@ -5797,97 +5797,6 @@ struct st_translate {
    bool tg4_component_in_swizzle;
 };
 
-/** Map Mesa's SYSTEM_VALUE_x to TGSI_SEMANTIC_x */
-enum tgsi_semantic
-_mesa_sysval_to_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;
-
-   /* Unhandled */
-   case SYSTEM_VALUE_LOCAL_INVOCATION_INDEX:
-   case SYSTEM_VALUE_GLOBAL_INVOCATION_ID:
-   case SYSTEM_VALUE_VERTEX_CNT:
-   case SYSTEM_VALUE_BARYCENTRIC_PERSP_PIXEL:
-   case SYSTEM_VALUE_BARYCENTRIC_PERSP_SAMPLE:
-   case SYSTEM_VALUE_BARYCENTRIC_PERSP_CENTROID:
-   case SYSTEM_VALUE_BARYCENTRIC_PERSP_SIZE:
-   default:
-      assert(!"Unexpected SYSTEM_VALUE_ enum");
-      return TGSI_SEMANTIC_COUNT;
-   }
-}
-
 /**
  * Map a glsl_to_tgsi constant/immediate to a TGSI immediate.
  */
@@ -6923,7 +6832,7 @@ st_translate_program(
 
       for (i = 0; sysInputs; i++) {
          if (sysInputs & (1ull << i)) {
-            enum tgsi_semantic semName = _mesa_sysval_to_semantic(i);
+            enum tgsi_semantic semName = tgsi_get_sysval_semantic(i);
 
             t->systemValues[i] = ureg_DECL_system_value(ureg, semName, 0);
 

src/mesa/state_tracker/st_mesa_to_tgsi.c

@@ -37,6 +37,7 @@
 #include "pipe/p_shader_tokens.h"
 #include "pipe/p_state.h"
 #include "tgsi/tgsi_ureg.h"
+#include "tgsi/tgsi_from_mesa.h"
 #include "st_mesa_to_tgsi.h"
 #include "st_context.h"
 #include "program/prog_instruction.h"
@@ -954,7 +955,7 @@ st_translate_mesa_program(struct gl_context *ctx,
    GLbitfield64 sysInputs = program->info.system_values_read;
    for (i = 0; sysInputs; i++) {
       if (sysInputs & (1ull << i)) {
-         unsigned semName = _mesa_sysval_to_semantic(i);
+         unsigned semName = tgsi_get_sysval_semantic(i);
 
          t->systemValues[i] = ureg_DECL_system_value(ureg, semName, 0);