[Mesa-dev] [PATCH 21/50] glsl: Add a lowering pass for 64-bit float neg()

[Dave Airlie]

From: Elie Tournier <tournier.elie at gmail.com>

Signed-off-by: Elie Tournier <elie.tournier at collabora.com>
---
 src/compiler/glsl/ir_optimization.h | 3 ++-
 src/compiler/glsl/lower_64bit.cpp   | 7 +++++++
 2 files changed, 9 insertions(+), 1 deletion(-)

diff --git a/src/compiler/glsl/ir_optimization.h b/src/compiler/glsl/ir_optimization.h
index 370812f..2d9728d 100644
--- a/src/compiler/glsl/ir_optimization.h
+++ b/src/compiler/glsl/ir_optimization.h
@@ -61,8 +61,9 @@
 #define DIV64                     (1U << 2)
 #define MOD64                     (1U << 3)
 #define ABS64                     (1U << 4)
+#define NEG64                     (1U << 5)
 
-#define LOWER_ALL_DOUBLE_OPS (ABS64)
+#define LOWER_ALL_DOUBLE_OPS (ABS64 | NEG64)
 /**
  * \see class lower_packing_builtins_visitor
  */
diff --git a/src/compiler/glsl/lower_64bit.cpp b/src/compiler/glsl/lower_64bit.cpp
index debedfc..bc9e477 100644
--- a/src/compiler/glsl/lower_64bit.cpp
+++ b/src/compiler/glsl/lower_64bit.cpp
@@ -424,6 +424,13 @@ lower_64bit_visitor::handle_rvalue(ir_rvalue **rvalue)
       }
       break;
 
+   case ir_unop_neg:
+      if (lowering(NEG64)) {
+         if (ir->type->base_type == GLSL_TYPE_DOUBLE)
+            *rvalue = handle_op(ir, "__builtin_fneg64", generate_ir::fneg64);
+      }
+      break;
+
    case ir_unop_sign:
       if (lowering(SIGN64)) {
          if (ir->type->is_integer_64())
-- 
2.9.5