diff options
| author | Matt Turner <[email protected]> | 2014-10-26 10:08:40 -0700 |
|---|---|---|
| committer | Matt Turner <[email protected]> | 2014-10-29 21:35:46 -0700 |
| commit | b65bd9583b9fe0080b5664df2a80d2084499e3c2 (patch) | |
| tree | b08a3b18307668a98c48258f594f7056ede2edc2 /src | |
| parent | d056863b3c535aeebfe5fcfc9468eb33a06ddb60 (diff) | |
i965/fs: Perform CSE on MAD instructions with final arguments switched.
Multiplication is commutative.
instructions in affected programs: 48314 -> 47954 (-0.75%)
Reviewed-by: Kenneth Graunke <[email protected]>
Diffstat (limited to 'src')
| -rw-r--r-- | src/mesa/drivers/dri/i965/brw_fs_cse.cpp | 6 |
1 files changed, 5 insertions, 1 deletions
diff --git a/src/mesa/drivers/dri/i965/brw_fs_cse.cpp b/src/mesa/drivers/dri/i965/brw_fs_cse.cpp index 801200118d7..5fdbf463984 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])) { |