r600g: vertex id support.

This requires GLSL 1.30 enabled, which requires integer types enabled,
so don't bother doing an INT to FLT conversion on it.

We should probably remove the instance id flt->int conversion when
turning on native integers.

this passes the three piglit tests with GLSL 1.30 forced on.

Signed-off-by: Dave Airlie <airlied@redhat.com>

diff --git a/src/gallium/drivers/r600/r600_shader.c b/src/gallium/drivers/r600/r600_shader.c
index 071622d..bc3652b 100644 (file)
--- a/src/gallium/drivers/r600/r600_shader.c
+++ b/src/gallium/drivers/r600/r600_shader.c
@@ -453,8 +453,8 @@ static int tgsi_declaration(struct r600_shader_ctx *ctx)
                        if ((r = r600_bytecode_add_alu(ctx->bc, &alu)))
                                return r;
                        break;
-               }
-
+               } else if (d->Semantic.Name == TGSI_SEMANTIC_VERTEXID)
+                       break;
        default:
                R600_ERR("unsupported file %d declaration\n", d->Declaration.File);
                return -EINVAL;
@@ -541,12 +541,19 @@ static void tgsi_src(struct r600_shader_ctx *ctx,
                r600_src->sel = V_SQ_ALU_SRC_LITERAL;
                memcpy(r600_src->value, ctx->literals + index * 4, sizeof(r600_src->value));
        } else if (tgsi_src->Register.File == TGSI_FILE_SYSTEM_VALUE) {
-               /* assume we wan't TGSI_SEMANTIC_INSTANCEID here */
-               r600_src->swizzle[0] = 3;
-               r600_src->swizzle[1] = 3;
-               r600_src->swizzle[2] = 3;
-               r600_src->swizzle[3] = 3;
-               r600_src->sel = 0;
+               if (ctx->info.system_value_semantic_name[tgsi_src->Register.Index] == TGSI_SEMANTIC_INSTANCEID) {
+                       r600_src->swizzle[0] = 3;
+                       r600_src->swizzle[1] = 3;
+                       r600_src->swizzle[2] = 3;
+                       r600_src->swizzle[3] = 3;
+                       r600_src->sel = 0;
+               } else if (ctx->info.system_value_semantic_name[tgsi_src->Register.Index] == TGSI_SEMANTIC_VERTEXID) {
+                       r600_src->swizzle[0] = 0;
+                       r600_src->swizzle[1] = 0;
+                       r600_src->swizzle[2] = 0;
+                       r600_src->swizzle[3] = 0;
+                       r600_src->sel = 0;
+               }
        } else {
                if (tgsi_src->Register.Indirect)
                        r600_src->rel = V_SQ_REL_RELATIVE;