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* internal.h: use __builtin_bswap16() if possible.

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* configure.in: check existence of __builtin_bswap16().

git-svn-id: svn+ssh://ci.ruby-lang.org/ruby/trunk@43831 b2dd03c8-39d4-4d8f-98ff-823fe69b080e
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glass 2013-11-24 16:03:22 +00:00
parent bc65d709ab
commit b25a6494cc
3 changed files with 13 additions and 0 deletions
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6
ChangeLog
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@ -1,3 +1,9 @@
Mon Nov 25 00:50:03 2013 Masaki Matsushita <glass.saga@gmail.com>
* internal.h: use __builtin_bswap16() if possible.
* configure.in: check existence of __builtin_bswap16().
Sun Nov 24 22:24:19 2013 Tanaka Akira <akr@fsij.org>
* bignum.c (bigxor_int): Apply BIGLO for long in a BDIGIT expression.

1
configure.in
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@ -1916,6 +1916,7 @@ AC_CACHE_CHECK([for $1], AS_TR_SH(rb_cv_builtin_$1),
if test "${AS_TR_SH(rb_cv_builtin_$1)}" != no; then
AC_DEFINE(AS_TR_CPP(HAVE_BUILTIN_$1))
fi])
RUBY_CHECK_BUILTIN_FUNC(__builtin_bswap16, [__builtin_bswap16(0)])
RUBY_CHECK_BUILTIN_FUNC(__builtin_bswap32, [__builtin_bswap32(0)])
RUBY_CHECK_BUILTIN_FUNC(__builtin_bswap64, [__builtin_bswap64(0)])
RUBY_CHECK_BUILTIN_FUNC(__builtin_clz, [__builtin_clz(0)])

6
internal.h
View file

@ -69,6 +69,12 @@ extern "C" {
#define MUL_OVERFLOW_LONG_P(a, b) MUL_OVERFLOW_SIGNED_INTEGER_P(a, b, LONG_MIN, LONG_MAX)
#define MUL_OVERFLOW_INT_P(a, b) MUL_OVERFLOW_SIGNED_INTEGER_P(a, b, INT_MIN, INT_MAX)
#ifndef swap16
# ifdef HAVE_BUILTIN___BUILTIN_BSWAP16
# define swap16(x) __builtin_bswap16(x)
# endif
#endif
#ifndef swap16
# define swap16(x) ((uint16_t)((((x)&0xFF)<<8) | (((x)>>8)&0xFF)))
#endif