spirv: add DF support to SpvOp*ConstantComposite

v2 (Jason):
- Add assert.

Signed-off-by: Samuel Iglesias Gonsálvez <siglesias@igalia.com>
Reviewed-by: Jason Ekstrand <jason@jlekstrand.net>

src/compiler/spirv/spirv_to_nir.c

@@ -1033,6 +1033,8 @@ vtn_handle_constant(struct vtn_builder *b, SpvOp opcode,
       case GLSL_TYPE_INT:
       case GLSL_TYPE_FLOAT:
       case GLSL_TYPE_BOOL:
+      case GLSL_TYPE_DOUBLE: {
+         int bit_size = glsl_get_bit_size(val->const_type);
          if (glsl_type_is_matrix(val->const_type)) {
             assert(glsl_get_matrix_columns(val->const_type) == elem_count);
             for (unsigned i = 0; i < elem_count; i++)
@@ -1040,12 +1042,18 @@ vtn_handle_constant(struct vtn_builder *b, SpvOp opcode,
          } else {
             assert(glsl_type_is_vector(val->const_type));
             assert(glsl_get_vector_elements(val->const_type) == elem_count);
-            for (unsigned i = 0; i < elem_count; i++)
-               val->constant->values[0].u32[i] = elems[i]->values[0].u32[0];
+            for (unsigned i = 0; i < elem_count; i++) {
+               if (bit_size == 64) {
+                  val->constant->values[0].u64[i] = elems[i]->values[0].u64[0];
+               } else {
+                  assert(bit_size == 32);
+                  val->constant->values[0].u32[i] = elems[i]->values[0].u32[0];
+               }
+            }
          }
          ralloc_free(elems);
          break;
-
+      }
       case GLSL_TYPE_STRUCT:
       case GLSL_TYPE_ARRAY:
          ralloc_steal(val->constant, elems);