diff options
| author | mrs <mrs@138bc75d-0d04-0410-961f-82ee72b054a4> | 2013-11-04 21:29:11 +0000 |
|---|---|---|
| committer | mrs <mrs@138bc75d-0d04-0410-961f-82ee72b054a4> | 2013-11-04 21:29:11 +0000 |
| commit | aeb682a27a580c32813c316b911b59b851f6f34e (patch) | |
| tree | caef14d95e41d87b155a732aa16f18f483eea729 /gcc/config/mips/mips.c | |
| parent | 8945e16bd0dc520c80b423cc0802c89ce551ff08 (diff) | |
| parent | 8dd9f7ce09ba28909b069f5baa405ea4cc7b5c42 (diff) | |
| download | gcc-aeb682a27a580c32813c316b911b59b851f6f34e.tar.gz | |
Merge in trunk.
git-svn-id: svn+ssh://gcc.gnu.org/svn/gcc/branches/wide-int@204366 138bc75d-0d04-0410-961f-82ee72b054a4
Diffstat (limited to 'gcc/config/mips/mips.c')
| -rw-r--r-- | gcc/config/mips/mips.c | 12 |
1 files changed, 12 insertions, 0 deletions
diff --git a/gcc/config/mips/mips.c b/gcc/config/mips/mips.c index 5040b40def5..510204203e1 100644 --- a/gcc/config/mips/mips.c +++ b/gcc/config/mips/mips.c @@ -3796,6 +3796,18 @@ mips_rtx_costs (rtx x, int code, int outer_code, int opno ATTRIBUTE_UNUSED, return true; } } + /* (AND (NOT op0) (NOT op1) is a nor operation that can be done in + a single instruction. */ + if (!TARGET_MIPS16 + && GET_CODE (XEXP (x, 0)) == NOT + && GET_CODE (XEXP (x, 1)) == NOT) + { + cost = GET_MODE_SIZE (mode) > UNITS_PER_WORD ? 2 : 1; + *total = (COSTS_N_INSNS (cost) + + set_src_cost (XEXP (XEXP (x, 0), 0), speed) + + set_src_cost (XEXP (XEXP (x, 1), 0), speed)); + return true; + } /* Fall through. */ |