diff options
Diffstat (limited to 'mesalib/src/glsl/opt_algebraic.cpp')
-rw-r--r-- | mesalib/src/glsl/opt_algebraic.cpp | 17 |
1 files changed, 17 insertions, 0 deletions
diff --git a/mesalib/src/glsl/opt_algebraic.cpp b/mesalib/src/glsl/opt_algebraic.cpp index 05a589989..332f0b77b 100644 --- a/mesalib/src/glsl/opt_algebraic.cpp +++ b/mesalib/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(); @@ -416,6 +422,17 @@ ir_algebraic_visitor::handle_expression(ir_expression *ir) } break; + case ir_binop_pow: + /* 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: if (op_expr[0] && op_expr[0]->operation == ir_unop_rcp) return op_expr[0]->operands[0]; |