r600g: disable I2F conversion for InstanceID if integers are supported

Signed-off-by: Vadim Girlin <vadimgirlin@gmail.com>
Reviewed-by: Michel Dänzer <michel@daenzer.net>
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 4932dcc..9d85de0 100644 (file)
--- a/src/gallium/drivers/r600/r600_shader.c
+++ b/src/gallium/drivers/r600/r600_shader.c
@@ -194,6 +194,7 @@ struct r600_shader_ctx {
        boolean                 clip_vertex_write;
        unsigned                cv_output;
        int                                     fragcoord_input;
+       int                                     native_integers;
 };
 
 struct r600_shader_tgsi_instruction {
@@ -500,20 +501,22 @@ static int tgsi_declaration(struct r600_shader_ctx *ctx)
 
        case TGSI_FILE_SYSTEM_VALUE:
                if (d->Semantic.Name == TGSI_SEMANTIC_INSTANCEID) {
-                       struct r600_bytecode_alu alu;
-                       memset(&alu, 0, sizeof(struct r600_bytecode_alu));
+                       if (!ctx->native_integers) {
+                               struct r600_bytecode_alu alu;
+                               memset(&alu, 0, sizeof(struct r600_bytecode_alu));
 
-                       alu.inst = CTX_INST(V_SQ_ALU_WORD1_OP2_SQ_OP2_INST_INT_TO_FLT);
-                       alu.src[0].sel = 0;
-                       alu.src[0].chan = 3;
+                               alu.inst = CTX_INST(V_SQ_ALU_WORD1_OP2_SQ_OP2_INST_INT_TO_FLT);
+                               alu.src[0].sel = 0;
+                               alu.src[0].chan = 3;
 
-                       alu.dst.sel = 0;
-                       alu.dst.chan = 3;
-                       alu.dst.write = 1;
-                       alu.last = 1;
+                               alu.dst.sel = 0;
+                               alu.dst.chan = 3;
+                               alu.dst.write = 1;
+                               alu.last = 1;
 
-                       if ((r = r600_bytecode_add_alu(ctx->bc, &alu)))
-                               return r;
+                               if ((r = r600_bytecode_add_alu(ctx->bc, &alu)))
+                                       return r;
+                       }
                        break;
                } else if (d->Semantic.Name == TGSI_SEMANTIC_VERTEXID)
                        break;
@@ -818,6 +821,8 @@ static int r600_shader_from_tgsi(struct r600_context * rctx, struct r600_pipe_sh
 
        ctx.bc = &shader->bc;
        ctx.shader = shader;
+       ctx.native_integers = (rctx->screen->glsl_feature_level >= 130);
+
        r600_bytecode_init(ctx.bc, rctx->chip_class, rctx->family);
        ctx.tokens = tokens;
        tgsi_scan_shader(tokens, &ctx.info);