On Wednesday, October 29, 2014 02:09:55 PM Matt Turner wrote:
> Multiplication is commutative.
>
> instructions in affected programs: 48314 -> 47954 (-0.75%)
> ---
> src/mesa/drivers/dri/i965/brw_fs_cse.cpp | 6 +++++-
> 1 file changed, 5 insertions(+), 1 deletion(-)
>
> diff --git a/src/mesa/drivers/dri/i965/brw_fs_cse.cpp
b/src/mesa/drivers/dri/i965/brw_fs_cse.cpp
> index 8012001..5fdbf46 100644
> --- a/src/mesa/drivers/dri/i965/brw_fs_cse.cpp
> +++ b/src/mesa/drivers/dri/i965/brw_fs_cse.cpp
> @@ -128,7 +128,11 @@ operands_match(fs_inst *a, fs_inst *b)
> fs_reg *xs = a->src;
> fs_reg *ys = b->src;
>
> - if (!is_expression_commutative(a->opcode)) {
> + if (a->opcode == BRW_OPCODE_MAD) {
> + return xs[0].equals(ys[0]) &&
> + ((xs[1].equals(ys[1]) && xs[2].equals(ys[2])) ||
> + (xs[2].equals(ys[1]) && xs[1].equals(ys[2])));
> + } else if (!is_expression_commutative(a->opcode)) {
> bool match = true;
> for (int i = 0; i < a->sources; i++) {
> if (!xs[i].equals(ys[i])) {
> Series is: Reviewed-by: Kenneth Graunke <kenn...@whitecape.org>
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