[Mesa-dev] [PATCH 2/2] st_glsl_to_tgsi: use ISSG

[Dave Airlie]

From: Dave Airlie <airlied at redhat.com>

Signed-off-by: Dave Airlie <airlied at redhat.com>
---
 src/mesa/state_tracker/st_glsl_to_tgsi.cpp |    5 ++++-
 1 files changed, 4 insertions(+), 1 deletions(-)

diff --git a/src/mesa/state_tracker/st_glsl_to_tgsi.cpp b/src/mesa/state_tracker/st_glsl_to_tgsi.cpp
index 3b8e2fe..460bc04 100644
--- a/src/mesa/state_tracker/st_glsl_to_tgsi.cpp
+++ b/src/mesa/state_tracker/st_glsl_to_tgsi.cpp
@@ -1416,7 +1416,10 @@ glsl_to_tgsi_visitor::visit(ir_expression *ir)
          emit(ir, TGSI_OPCODE_ABS, result_dst, op[0]);
       break;
    case ir_unop_sign:
-      emit(ir, TGSI_OPCODE_SSG, result_dst, op[0]);
+      if (result_dst.type == GLSL_TYPE_INT || result_dst.type == GLSL_TYPE_UINT)
+         emit(ir, TGSI_OPCODE_ISSG, result_dst, op[0]);
+      else
+         emit(ir, TGSI_OPCODE_SSG, result_dst, op[0]);
       break;
    case ir_unop_rcp:
       emit_scalar(ir, TGSI_OPCODE_RCP, result_dst, op[0]);
-- 
1.7.7.4