[Mesa-dev] [PATCH] nir: Move system value -> intrinsic mapping into nir.c

[Jason Ekstrand]

This way they're right next to the map going the other direction.
---
 src/glsl/nir/nir.c                     | 34 +++++++++++++++++++++++++++++++++
 src/glsl/nir/nir.h                     |  1 +
 src/glsl/nir/nir_lower_system_values.c | 35 +---------------------------------
 3 files changed, 36 insertions(+), 34 deletions(-)

diff --git a/src/glsl/nir/nir.c b/src/glsl/nir/nir.c
index ab06ea2..0a74943 100644
--- a/src/glsl/nir/nir.c
+++ b/src/glsl/nir/nir.c
@@ -1405,6 +1405,40 @@ nir_index_ssa_defs(nir_function_impl *impl)
    impl->ssa_alloc = index;
 }
 
+nir_intrinsic_op
+nir_intrinsic_from_system_value(gl_system_value val)
+{
+   switch (val) {
+   case SYSTEM_VALUE_VERTEX_ID:
+      return nir_intrinsic_load_vertex_id;
+   case SYSTEM_VALUE_INSTANCE_ID:
+      return nir_intrinsic_load_instance_id;
+   case SYSTEM_VALUE_VERTEX_ID_ZERO_BASE:
+      return nir_intrinsic_load_vertex_id_zero_base;
+   case SYSTEM_VALUE_BASE_VERTEX:
+      return nir_intrinsic_load_base_vertex;
+   case SYSTEM_VALUE_INVOCATION_ID:
+      return nir_intrinsic_load_invocation_id;
+   case SYSTEM_VALUE_FRONT_FACE:
+      return nir_intrinsic_load_front_face;
+   case SYSTEM_VALUE_SAMPLE_ID:
+      return nir_intrinsic_load_sample_id;
+   case SYSTEM_VALUE_SAMPLE_POS:
+      return nir_intrinsic_load_sample_pos;
+   case SYSTEM_VALUE_SAMPLE_MASK_IN:
+      return nir_intrinsic_load_sample_mask_in;
+   /* FINISHME: Add tessellation intrinsics.
+   case SYSTEM_VALUE_TESS_COORD:
+   case SYSTEM_VALUE_VERTICES_IN:
+   case SYSTEM_VALUE_PRIMITIVE_ID:
+   case SYSTEM_VALUE_TESS_LEVEL_OUTER:
+   case SYSTEM_VALUE_TESS_LEVEL_INNER:
+    */
+   default:
+      unreachable("system value does not directly correspond to intrinsic");
+   }
+}
+
 gl_system_value
 nir_system_value_from_intrinsic(nir_intrinsic_op intrin)
 {
diff --git a/src/glsl/nir/nir.h b/src/glsl/nir/nir.h
index 2ba7731..5676cfd 100644
--- a/src/glsl/nir/nir.h
+++ b/src/glsl/nir/nir.h
@@ -1855,6 +1855,7 @@ bool nir_opt_undef(nir_shader *shader);
 
 void nir_sweep(nir_shader *shader);
 
+nir_intrinsic_op nir_intrinsic_from_system_value(gl_system_value val);
 gl_system_value nir_system_value_from_intrinsic(nir_intrinsic_op intrin);
 
 #ifdef __cplusplus
diff --git a/src/glsl/nir/nir_lower_system_values.c b/src/glsl/nir/nir_lower_system_values.c
index a6eec65..b6c140c 100644
--- a/src/glsl/nir/nir_lower_system_values.c
+++ b/src/glsl/nir/nir_lower_system_values.c
@@ -40,40 +40,7 @@ convert_instr(nir_intrinsic_instr *instr)
 
    void *mem_ctx = ralloc_parent(instr);
 
-   nir_intrinsic_op op;
-
-   switch (var->data.location) {
-   case SYSTEM_VALUE_FRONT_FACE:
-      op = nir_intrinsic_load_front_face;
-      break;
-   case SYSTEM_VALUE_VERTEX_ID:
-      op = nir_intrinsic_load_vertex_id;
-      break;
-   case SYSTEM_VALUE_VERTEX_ID_ZERO_BASE:
-      op = nir_intrinsic_load_vertex_id_zero_base;
-      break;
-   case SYSTEM_VALUE_BASE_VERTEX:
-      op = nir_intrinsic_load_base_vertex;
-      break;
-   case SYSTEM_VALUE_INSTANCE_ID:
-      op = nir_intrinsic_load_instance_id;
-      break;
-   case SYSTEM_VALUE_SAMPLE_ID:
-      op = nir_intrinsic_load_sample_id;
-      break;
-   case SYSTEM_VALUE_SAMPLE_POS:
-      op = nir_intrinsic_load_sample_pos;
-      break;
-   case SYSTEM_VALUE_SAMPLE_MASK_IN:
-      op = nir_intrinsic_load_sample_mask_in;
-      break;
-   case SYSTEM_VALUE_INVOCATION_ID:
-      op = nir_intrinsic_load_invocation_id;
-      break;
-   default:
-      unreachable("not reached");
-   }
-
+   nir_intrinsic_op op = nir_intrinsic_from_system_value(var->data.location);
    nir_intrinsic_instr *new_instr = nir_intrinsic_instr_create(mem_ctx, op);
 
    if (instr->dest.is_ssa) {
-- 
2.5.0.400.gff86faf