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| author | Nobuyoshi Nakada <nobu@ruby-lang.org> | 2020-05-03 14:38:19 +0900 |
|---|---|---|
| committer | Nobuyoshi Nakada <nobu@ruby-lang.org> | 2020-05-03 15:29:51 +0900 |
| commit | e49ecaed57181c10bf01e1f84b9eead65a759386 (patch) | |
| tree | 21b48793d6c844854384734d244e4efe570a86b7 /configure.ac | |
| parent | 8af098b40ee3788f3d13f02298eeecfb52fa0c16 (diff) | |
Optimize sin/cos
GCC/Clang can optimize to calculate `sin(x)` and `cos(x)` at once,
when the both are closely called on the same argument.
Similar optimization is possible for `__sinpi(x)` and `__cospi(x)`
if available, which calculate arguments in radian, i.e.
`sin(x*M_PI)` and `cos(x*M_PI)` respectively.
Diffstat (limited to 'configure.ac')
| -rw-r--r-- | configure.ac | 2 |
1 files changed, 2 insertions, 0 deletions
diff --git a/configure.ac b/configure.ac index e16c3e44ed..f78eb38c93 100644 --- a/configure.ac +++ b/configure.ac @@ -1991,6 +1991,8 @@ AC_CHECK_FUNCS(utimensat) AC_CHECK_FUNCS(utimes) AC_CHECK_FUNCS(wait4) AC_CHECK_FUNCS(waitpid) +AC_CHECK_FUNCS(__cospi) +AC_CHECK_FUNCS(__sinpi) AS_IF([test "x$ac_cv_member_struct_statx_stx_btime" = xyes], [AC_CHECK_FUNCS(statx)]) |