glsl: Add ir_binop_carry and ir_binop_borrow.

Calculates the carry out of the addition of two values and the
borrow from subtraction respectively. Will be used in uaddCarry() and
usubBorrow() built-in implementations.

Reviewed-by: Kenneth Graunke <[email protected]>
Reviewed-by: Ian Romanick <[email protected]>

1 files changed, 15 insertions, 0 deletions

diff --git a/src/glsl/ir.h b/src/glsl/ir.h
index 1a4a3a2e36b..756ce9c7cd3 100644
--- a/src/glsl/ir.h
+++ b/src/glsl/ir.h
@@ -1095,6 +1095,21 @@ enum ir_expression_operation {
    ir_binop_div,
 
    /**
+    * Returns the carry resulting from the addition of the two arguments.
+    */
+   /*@{*/
+   ir_binop_carry,
+   /*@}*/
+
+   /**
+    * Returns the borrow resulting from the subtraction of the second argument
+    * from the first argument.
+    */
+   /*@{*/
+   ir_binop_borrow,
+   /*@}*/
+
+   /**
     * Takes one of two combinations of arguments:
     *
     * - mod(vecN, vecN)