diff options
| -rw-r--r-- | src/glsl/opt_algebraic.cpp | 11 |
1 files changed, 11 insertions, 0 deletions
diff --git a/src/glsl/opt_algebraic.cpp b/src/glsl/opt_algebraic.cpp index 5e885f78648..332f0b77b87 100644 --- a/src/glsl/opt_algebraic.cpp +++ b/src/glsl/opt_algebraic.cpp @@ -88,6 +88,12 @@ is_vec_one(ir_constant *ir) } static inline bool +is_vec_two(ir_constant *ir) +{ + return (ir == NULL) ? false : ir->is_value(2.0, 2); +} + +static inline bool is_vec_negative_one(ir_constant *ir) { return (ir == NULL) ? false : ir->is_negative_one(); @@ -420,6 +426,11 @@ ir_algebraic_visitor::handle_expression(ir_expression *ir) /* 1^x == 1 */ if (is_vec_one(op_const[0])) return op_const[0]; + + /* pow(2,x) == exp2(x) */ + if (is_vec_two(op_const[0])) + return expr(ir_unop_exp2, ir->operands[1]); + break; case ir_unop_rcp: |