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* pack.c (swap32): use __builtin_bswap32 on gcc 4.3.0 or later.

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(swap64): ditto.


git-svn-id: svn+ssh://ci.ruby-lang.org/ruby/trunk@26776 b2dd03c8-39d4-4d8f-98ff-823fe69b080e
This commit is contained in:
akr 2010-02-27 22:00:15 +00:00
parent 81b7329d0b
commit 95fd5f33c0
2 changed files with 17 additions and 1 deletions
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5
ChangeLog
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@ -1,3 +1,8 @@
Sun Feb 28 06:58:53 2010 Tanaka Akira <akr@fsij.org>
* pack.c (swap32): use __builtin_bswap32 on gcc 4.3.0 or later.
(swap64): ditto.
Sun Feb 28 00:38:18 2010 Tanaka Akira <akr@fsij.org>
* pack.c: use integer types with explicit size.

13
pack.c
View file

@ -15,6 +15,12 @@
#include <ctype.h>
#include <errno.h>
#define GCC_VERSION_SINCE(major, minor, patchlevel) \
(defined(__GNUC__) && !defined(__INTEL_COMPILER) && \
((__GNUC__ > (major)) || \
(__GNUC__ == (major) && __GNUC_MINOR__ > (minor)) || \
(__GNUC__ == (major) && __GNUC_MINOR__ == (minor) && __GNUC_PATCHLEVEL__ >= (patchlevel))))
#define SIZE16 2
#define SIZE32 4
@ -79,6 +85,11 @@ TOKEN_PASTE(swap,x)(xtype z) \
return r; \
}
#if GCC_VERSION_SINCE(4,3,0)
# define swap32(x) __builtin_bswap32(x)
# define swap64(x) __builtin_bswap64(x)
#endif
#ifndef swap16
# define swap16(x) ((((x)&0xFF)<<8) | (((x)>>8)&0xFF))
#endif
@ -92,7 +103,7 @@ TOKEN_PASTE(swap,x)(xtype z) \
#ifndef swap64
# ifdef HAVE_INT64_T
# define byte_in_64bit(n) ((uint64_t)0xff << n)
# define byte_in_64bit(n) ((uint64_t)0xff << (n))
# define swap64(x) ((((x)&byte_in_64bit(0))<<56) \
|(((x)>>56)&0xFF) \
|(((x)&byte_in_64bit(8))<<40) \