[Mesa-dev] [PATCH 32/47] glsl: Add a lowering pass for 64-bit float f2d()

[Elie Tournier]

Signed-off-by: Elie Tournier <elie.tourn...@collabora.com>
---
 src/compiler/glsl/ir_optimization.h        | 1 +
 src/compiler/glsl/lower_64bit.cpp          | 7 +++++++
 src/mesa/state_tracker/st_glsl_to_tgsi.cpp | 3 ++-
 3 files changed, 10 insertions(+), 1 deletion(-)

diff --git a/src/compiler/glsl/ir_optimization.h 
b/src/compiler/glsl/ir_optimization.h
index 2d5a210dca..dce0bf4a9f 100644
--- a/src/compiler/glsl/ir_optimization.h
+++ b/src/compiler/glsl/ir_optimization.h
@@ -73,6 +73,7 @@
 #define D2I                       (1U << 12)
 #define I2D                       (1U << 13)
 #define D2F                       (1U << 14)
+#define F2D                       (1U << 15)
 
 /**
  * \see class lower_packing_builtins_visitor
diff --git a/src/compiler/glsl/lower_64bit.cpp 
b/src/compiler/glsl/lower_64bit.cpp
index 48c053b02b..054cdcb50a 100644
--- a/src/compiler/glsl/lower_64bit.cpp
+++ b/src/compiler/glsl/lower_64bit.cpp
@@ -457,6 +457,13 @@ lower_64bit_visitor::handle_rvalue(ir_rvalue **rvalue)
       }
       break;
 
+   case ir_unop_f2d:
+      if (lowering(F2D)) {
+         if (ir->type->base_type == GLSL_TYPE_DOUBLE)
+            *rvalue = handle_op(ir, "__builtin_fp32_to_fp64", 
generate_ir::fp32_to_fp64, true);
+      }
+      break;
+
    case ir_unop_i2d:
       if (lowering(I2D)) {
          if (ir->type->base_type == GLSL_TYPE_DOUBLE)
diff --git a/src/mesa/state_tracker/st_glsl_to_tgsi.cpp 
b/src/mesa/state_tracker/st_glsl_to_tgsi.cpp
index 53d85360b2..f26368812f 100644
--- a/src/mesa/state_tracker/st_glsl_to_tgsi.cpp
+++ b/src/mesa/state_tracker/st_glsl_to_tgsi.cpp
@@ -7070,7 +7070,8 @@ st_link_shader(struct gl_context *ctx, struct 
gl_shader_program *prog)
                                U2D |
                                D2I |
                                I2D |
-                               D2F;
+                               D2F |
+                               F2D;
          lower_64bit_double_instructions(ir, lower_inst);
       }
 
-- 
2.14.1

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