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| author | Wilco Dijkstra <wdijkstr@arm.com> | 2017-03-22 17:51:12 +0000 |
|---|---|---|
| committer | Wilco Dijkstra <wilco@gcc.gnu.org> | 2017-03-22 17:51:12 +0000 |
| commit | e0701ef04266fa742bd3c7ced44b3195e32f146e (patch) | |
| tree | 01fbece878beaa3b38ecf586e77ca0b209da9464 /gcc/config | |
| parent | 992113522d88d5676b29a74bde4f3d5f21fd0c85 (diff) | |
| download | gcc-e0701ef04266fa742bd3c7ced44b3195e32f146e.zip gcc-e0701ef04266fa742bd3c7ced44b3195e32f146e.tar.gz gcc-e0701ef04266fa742bd3c7ced44b3195e32f146e.tar.bz2 | |
Many supported cores implement fusion of AES instructions.
Many supported cores implement fusion of AES instructions. When fusion
happens it can give a significant performance gain. If not, scheduling
fusion candidates next to each other has almost no effect on performance.
Due to the high benefit/low cost it makes sense to enable AES fusion with
-mcpu=generic so that cores that support it always benefit.
gcc/
* config/aarch64/aarch64.c (generic_tunings): Add AES fusion.
From-SVN: r246395
Diffstat (limited to 'gcc/config')
| -rw-r--r-- | gcc/config/aarch64/aarch64.c | 2 |
1 files changed, 1 insertions, 1 deletions
diff --git a/gcc/config/aarch64/aarch64.c b/gcc/config/aarch64/aarch64.c index a069427..eb0095d 100644 --- a/gcc/config/aarch64/aarch64.c +++ b/gcc/config/aarch64/aarch64.c @@ -536,7 +536,7 @@ static const struct tune_params generic_tunings = &generic_approx_modes, 4, /* memmov_cost */ 2, /* issue_rate */ - AARCH64_FUSE_NOTHING, /* fusible_ops */ + (AARCH64_FUSE_AES_AESMC), /* fusible_ops */ 8, /* function_align. */ 8, /* jump_align. */ 4, /* loop_align. */ |