From: Thomas Helland <thomashellan...@gmail.com>
And it's exp2() equivalent.
Signed-off-by: Thomas Helland <thomashellan...@gmail.com>
---
src/glsl/opt_algebraic.cpp | 11 +++++++++++
1 file changed, 11 insertions(+)
diff --git a/src/glsl/opt_algebraic.cpp b/src/glsl/opt_algebraic.cpp
index e2abf5f..2361d0f 100644
--- a/src/glsl/opt_algebraic.cpp
+++ b/src/glsl/opt_algebraic.cpp
@@ -470,6 +470,17 @@ ir_algebraic_visitor::handle_expression(ir_expression *ir)
if (is_vec_negative_one(op_const[1]))
return neg(ir->operands[0]);
+ if (op_expr[0] && op_expr[1]) {
+ /* exp(x) * exp(y) == exp(x+y) */
+ if (op_expr[0]->operation == ir_unop_exp &&
+ op_expr[1]->operation == ir_unop_exp)
+ return exp(add(op_expr[0]->operands[0], op_expr[1]->operands[0]));
+ /* exp2(x) * exp2(y) == exp2(x+y) */
+ if (op_expr[0]->operation == ir_unop_exp2 &&
+ op_expr[1]->operation == ir_unop_exp2)
+ return new (mem_ctx) ir_expression(ir_unop_exp2,
+ add(op_expr[0]->operands[0], op_expr[1]->operands[0]));
+ }
/* Reassociate multiplication of constants so that we can do
* constant folding.
--
2.0.0
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