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am 91a61f77: Merge "Switch x86 and x86-64 to __builtin_bswap*."

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* commit '91a61f77e203bf519c28f9331b9c8db731869499':
  Switch x86 and x86-64 to __builtin_bswap*.
This commit is contained in:
Elliott Hughes 2014-12-03 17:23:29 +00:00 committed by Android Git Automerger
commit b06e125c01
2 changed files with 8 additions and 47 deletions
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27
libc/arch-x86/include/machine/endian.h
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@ -27,33 +27,14 @@
#ifndef _MACHINE_ENDIAN_H_
#define _MACHINE_ENDIAN_H_
#ifdef __GNUC__
#define __swap32md(x) __statement({ \
uint32_t __swap32md_x = (x); \
\
__asm ("bswap %0" : "+r" (__swap32md_x)); \
__swap32md_x; \
})
#define __swap64md(x) __statement({ \
uint64_t __swap64md_x = (x); \
\
(uint64_t)__swap32md(__swap64md_x >> 32) | \
(uint64_t)__swap32md(__swap64md_x & 0xffffffff) << 32; \
})
#define __swap16md(x) __statement({ \
uint16_t __swap16md_x = (x); \
\
__asm ("rorw $8, %w0" : "+r" (__swap16md_x)); \
__swap16md_x; \
})
/* Use GCC builtins */
#define __swap16md(x) __builtin_bswap16(x)
#define __swap32md(x) __builtin_bswap32(x)
#define __swap64md(x) __builtin_bswap64(x)
/* Tell sys/endian.h we have MD variants of the swap macros. */
#define MD_SWAP
#endif /* __GNUC__ */
#define _BYTE_ORDER _LITTLE_ENDIAN
#include <sys/types.h>
#include <sys/endian.h>

28
libc/arch-x86_64/include/machine/endian.h
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@ -27,34 +27,14 @@
#ifndef _MACHINE_ENDIAN_H_
#define _MACHINE_ENDIAN_H_
#ifdef __GNUC__
#define __swap32md(x) __statement({ \
u_int32_t __swap32md_x = (x); \
\
__asm ("bswap %0" : "+r" (__swap32md_x)); \
__swap32md_x; \
})
#define __swap64md(x) __statement({ \
u_int64_t __swap64md_x = (x); \
\
__asm ("bswapq %0" : "+r" (__swap64md_x)); \
__swap64md_x; \
})
#define __swap16md(x) __statement({ \
u_int16_t __swap16md_x = (x); \
\
__asm ("rorw $8, %w0" : "+r" (__swap16md_x)); \
__swap16md_x; \
})
/* Use GCC builtins */
#define __swap16md(x) __builtin_bswap16(x)
#define __swap32md(x) __builtin_bswap32(x)
#define __swap64md(x) __builtin_bswap64(x)
/* Tell sys/endian.h we have MD variants of the swap macros. */
#define MD_SWAP
#endif /* __GNUC__ */
#define _BYTE_ORDER _LITTLE_ENDIAN
#include <sys/types.h>
#include <sys/endian.h>