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| author | Jakub Jelinek <jakub@redhat.com> | 2018-05-04 09:19:45 +0200 |
|---|---|---|
| committer | Jakub Jelinek <jakub@gcc.gnu.org> | 2018-05-04 09:19:45 +0200 |
| commit | 047823853d8324eab7d6ad8f266ee5395c4a76ff (patch) | |
| tree | 577de47e3f2f5746febab4c2403441ef0d8abd9f /gcc/real.h | |
| parent | 105073e1cc39fbeb03aa40e294ffc3c400cfa844 (diff) | |
re PR tree-optimization/85466 (Performance is slow when doing 'branchless' conditional style math operations)
PR libstdc++/85466
* real.h (real_nextafter): Declare.
* real.c (real_nextafter): New function.
* fold-const-call.c (fold_const_nextafter): New function.
(fold_const_call_sss): Call it for CASE_CFN_NEXTAFTER and
CASE_CFN_NEXTTOWARD.
(fold_const_call_1): For CASE_CFN_NEXTTOWARD call fold_const_call_sss
even when arg1_mode is different from arg0_mode.
* gcc.dg/nextafter-1.c: New test.
* gcc.dg/nextafter-2.c: New test.
* gcc.dg/nextafter-3.c: New test.
* gcc.dg/nextafter-4.c: New test.
From-SVN: r259921
Diffstat (limited to 'gcc/real.h')
| -rw-r--r-- | gcc/real.h | 4 |
1 files changed, 4 insertions, 0 deletions
diff --git a/gcc/real.h b/gcc/real.h index e51073b19b9..0ce42565708 100644 --- a/gcc/real.h +++ b/gcc/real.h @@ -507,6 +507,10 @@ extern void real_copysign (REAL_VALUE_TYPE *, const REAL_VALUE_TYPE *); extern bool real_isinteger (const REAL_VALUE_TYPE *, format_helper); extern bool real_isinteger (const REAL_VALUE_TYPE *, HOST_WIDE_INT *); +/* Calculate nextafter (X, Y) in format FMT. */ +extern bool real_nextafter (REAL_VALUE_TYPE *, format_helper, + const REAL_VALUE_TYPE *, const REAL_VALUE_TYPE *); + /* Write into BUF the maximum representable finite floating-point number, (1 - b**-p) * b**emax for a given FP format FMT as a hex float string. BUF must be large enough to contain the result. */ |