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| author | Matt Turner <mattst88@gmail.com> | 2014-02-24 15:00:45 -0800 |
|---|---|---|
| committer | Matt Turner <mattst88@gmail.com> | 2014-02-28 10:36:12 -0800 |
| commit | d5fa8a956211692441b9c3ffc97b7486599ab3a3 (patch) | |
| tree | 5cb6b7339c046f62088950bf97a104ad7fe71578 /src/glsl/opt_algebraic.cpp | |
| parent | ecc6c3d4ab31c6cd848bce02790000c165a02229 (diff) | |
| download | external_mesa3d-d5fa8a956211692441b9c3ffc97b7486599ab3a3.zip external_mesa3d-d5fa8a956211692441b9c3ffc97b7486599ab3a3.tar.gz external_mesa3d-d5fa8a956211692441b9c3ffc97b7486599ab3a3.tar.bz2 | |
glsl: Optimize lrp(x, 0, a) into x - (x * a).
Helps one program in shader-db:
instructions in affected programs: 96 -> 92 (-4.17%)
Reviewed-by: Ian Romanick <ian.d.romanick@intel.com>
Diffstat (limited to 'src/glsl/opt_algebraic.cpp')
| -rw-r--r-- | src/glsl/opt_algebraic.cpp | 2 |
1 files changed, 2 insertions, 0 deletions
diff --git a/src/glsl/opt_algebraic.cpp b/src/glsl/opt_algebraic.cpp index 28f95a4..778638c 100644 --- a/src/glsl/opt_algebraic.cpp +++ b/src/glsl/opt_algebraic.cpp @@ -570,6 +570,8 @@ ir_algebraic_visitor::handle_expression(ir_expression *ir) return ir->operands[0]; } else if (is_vec_zero(op_const[0])) { return mul(ir->operands[1], ir->operands[2]); + } else if (is_vec_zero(op_const[1])) { + return add(ir->operands[0], neg(mul(ir->operands[0], ir->operands[2]))); } break; |