[Mesa-dev] [PATCH 31/50] glsl: Add a lowering pass for 64-bit float d2f()

[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 | 4 +++-
 src/compiler/glsl/lower_64bit.cpp   | 7 +++++++
 2 files changed, 10 insertions(+), 1 deletion(-)

diff --git a/src/compiler/glsl/ir_optimization.h b/src/compiler/glsl/ir_optimization.h
index f73faec..e7860ef 100644
--- a/src/compiler/glsl/ir_optimization.h
+++ b/src/compiler/glsl/ir_optimization.h
@@ -69,9 +69,11 @@
 #define U2D                       (1U << 10)
 #define D2I                       (1U << 11)
 #define I2D                       (1U << 12)
+#define D2F                       (1U << 13)
 
 #define LOWER_ALL_DOUBLE_OPS (ABS64 | NEG64 | SIGN64 | EQ64 | LT64 | \
-                              ADD64 | MUL64 | D2U | U2D | D2I | I2D)
+                              ADD64 | MUL64 | D2U | U2D | D2I | I2D | \
+                              D2F)
 
 /**
  * \see class lower_packing_builtins_visitor
diff --git a/src/compiler/glsl/lower_64bit.cpp b/src/compiler/glsl/lower_64bit.cpp
index 2900409..e76ebdc 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_d2f:
+      if (lowering(D2F)) {
+         if (ir->type->base_type == GLSL_TYPE_FLOAT)
+            *rvalue = handle_op(ir, "__builtin_fp64_to_fp32", generate_ir::fp64_to_fp32);
+      }
+      break;
+
    case ir_unop_d2i:
       if (lowering(D2I)) {
          if (ir->type->base_type == GLSL_TYPE_INT)
-- 
2.9.5