diff options
| -rw-r--r-- | src/glsl/opt_algebraic.cpp | 20 |
1 files changed, 20 insertions, 0 deletions
diff --git a/src/glsl/opt_algebraic.cpp b/src/glsl/opt_algebraic.cpp index 3d2f2ca0bab..fa5db70f2dd 100644 --- a/src/glsl/opt_algebraic.cpp +++ b/src/glsl/opt_algebraic.cpp @@ -99,6 +99,12 @@ is_vec_two(ir_constant *ir) } static inline bool +is_vec_four(ir_constant *ir) +{ + return (ir == NULL) ? false : ir->is_value(4.0, 4); +} + +static inline bool is_vec_negative_one(ir_constant *ir) { return (ir == NULL) ? false : ir->is_negative_one(); @@ -774,6 +780,20 @@ ir_algebraic_visitor::handle_expression(ir_expression *ir) return mul(x, x); } + if (is_vec_four(op_const[1])) { + ir_variable *x = new(ir) ir_variable(ir->operands[1]->type, "x", + ir_var_temporary); + base_ir->insert_before(x); + base_ir->insert_before(assign(x, ir->operands[0])); + + ir_variable *squared = new(ir) ir_variable(ir->operands[1]->type, + "squared", + ir_var_temporary); + base_ir->insert_before(squared); + base_ir->insert_before(assign(squared, mul(x, x))); + return mul(squared, squared); + } + break; case ir_binop_min: |