[Mesa-dev] [PATCH 22/47] glsl: Add a lowering pass for 64-bit float equal()

[Elie Tournier]

Signed-off-by: Elie Tournier <elie.tournier at 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 ad76a7032e..86cfdf7619 100644
--- a/src/compiler/glsl/ir_optimization.h
+++ b/src/compiler/glsl/ir_optimization.h
@@ -64,6 +64,7 @@
 #define MOD64                     (1U << 3)
 #define ABS64                     (1U << 4)
 #define NEG64                     (1U << 5)
+#define EQ64                      (1U << 6)
 
 /**
  * \see class lower_packing_builtins_visitor
diff --git a/src/compiler/glsl/lower_64bit.cpp b/src/compiler/glsl/lower_64bit.cpp
index 86ee13cb89..95d7c4c3d4 100644
--- a/src/compiler/glsl/lower_64bit.cpp
+++ b/src/compiler/glsl/lower_64bit.cpp
@@ -438,6 +438,13 @@ lower_64bit_visitor::handle_rvalue(ir_rvalue **rvalue)
       }
       break;
 
+   case ir_binop_equal:
+      if (lowering(EQ64)) {
+         if (ir->operands[0]->type->base_type == GLSL_TYPE_DOUBLE)
+            *rvalue = handle_op(ir, "__builtin_feq64", generate_ir::feq64);
+      }
+      break;
+
    case ir_binop_mod:
       if (lowering(MOD64)) {
          if (ir->type->base_type == GLSL_TYPE_UINT64) {
diff --git a/src/mesa/state_tracker/st_glsl_to_tgsi.cpp b/src/mesa/state_tracker/st_glsl_to_tgsi.cpp
index 1d5e74ab31..e7b848872b 100644
--- a/src/mesa/state_tracker/st_glsl_to_tgsi.cpp
+++ b/src/mesa/state_tracker/st_glsl_to_tgsi.cpp
@@ -7060,7 +7060,8 @@ st_link_shader(struct gl_context *ctx, struct gl_shader_program *prog)
             ctx->Const.GLSLVersion >= 130) {
          unsigned lower_inst = ABS64 |
                                NEG64 |
-                               SIGN64;
+                               SIGN64 |
+                               EQ64;
          lower_64bit_double_instructions(ir, lower_inst);
       }
 
-- 
2.14.1