Implement dFdx, dFdy, and fwidth via new expression opcodes.

1 files changed, 5 insertions, 0 deletions

diff --git a/ir.cpp b/ir.cpp
index ca34c24719..c5eb94d2d5 100644
--- a/ir.cpp
+++ b/ir.cpp
@@ -76,6 +76,9 @@ ir_expression::get_num_operands(ir_expression_operation op)
       1, /* ir_unop_sin */
       1, /* ir_unop_cos */
 
+      1, /* ir_unop_dFdx */
+      1, /* ir_unop_dFdy */
+
       2, /* ir_binop_add */
       2, /* ir_binop_sub */
       2, /* ir_binop_mul */
@@ -136,6 +139,8 @@ static const char *const operator_strs[] = {
    "floor",
    "sin",
    "cos",
+   "dFdx",
+   "dFdy",
    "+",
    "-",
    "*",