[Mesa-dev] [PATCH 24/47] glsl: Add a lowering pass for 64-bit float less()

[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 271dad77e4..ee8cd92269 100644
--- a/src/compiler/glsl/ir_optimization.h
+++ b/src/compiler/glsl/ir_optimization.h
@@ -66,6 +66,7 @@
 #define NEG64                     (1U << 5)
 #define EQ64                      (1U << 6)
 #define LE64                      (1U << 7)
+#define LT64                      (1U << 8)
 
 /**
  * \see class lower_packing_builtins_visitor
diff --git a/src/compiler/glsl/lower_64bit.cpp b/src/compiler/glsl/lower_64bit.cpp
index 68ffa8f706..2b6580d293 100644
--- a/src/compiler/glsl/lower_64bit.cpp
+++ b/src/compiler/glsl/lower_64bit.cpp
@@ -452,6 +452,13 @@ lower_64bit_visitor::handle_rvalue(ir_rvalue **rvalue)
       }
       break;
 
+   case ir_binop_less:
+      if (lowering(LT64)) {
+         if (ir->operands[0]->type->base_type == GLSL_TYPE_DOUBLE)
+            *rvalue = handle_op(ir, "__builtin_flt64", generate_ir::flt64);
+      }
+      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 78fa1e3a76..59f896a785 100644
--- a/src/mesa/state_tracker/st_glsl_to_tgsi.cpp
+++ b/src/mesa/state_tracker/st_glsl_to_tgsi.cpp
@@ -7062,7 +7062,8 @@ st_link_shader(struct gl_context *ctx, struct gl_shader_program *prog)
                                NEG64 |
                                SIGN64 |
                                EQ64 |
-                               LE64;
+                               LE64 |
+                               LT64;
          lower_64bit_double_instructions(ir, lower_inst);
       }
 
-- 
2.14.1