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split bswap.h into per-arch files

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Originally committed as revision 15663 to svn://svn.ffmpeg.org/ffmpeg/trunk
This commit is contained in:
Måns Rullgård 2008-10-21 22:29:57 +00:00
parent 37d3e0667a
commit 3a90480ac4
5 changed files with 221 additions and 43 deletions
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59
libavutil/bswap.h
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@ -30,68 +30,40 @@
#include "config.h"
#include "common.h"
#if defined(ARCH_ARMV4L)
# include "arm/bswap.h"
#elif defined(ARCH_BFIN)
# include "bfin/bswap.h"
#elif defined(ARCH_SH4)
# include "sh4/bswap.h"
#elif defined(ARCH_X86)
# include "x86/bswap.h"
#endif
#ifndef bswap_16
static av_always_inline av_const uint16_t bswap_16(uint16_t x)
{
#if defined(ARCH_X86)
__asm__("rorw $8, %0" : "+r"(x));
#elif defined(ARCH_SH4)
__asm__("swap.b %0,%0" : "=r"(x) : "0"(x));
#elif defined(HAVE_ARMV6)
__asm__("rev16 %0, %0" : "+r"(x));
#else
x= (x>>8) | (x<<8);
#endif
return x;
}
#endif
#ifndef bswap_32
static av_always_inline av_const uint32_t bswap_32(uint32_t x)
{
#if defined(ARCH_X86)
#ifdef HAVE_BSWAP
__asm__("bswap %0" : "+r" (x));
#else
__asm__("rorw $8, %w0 \n\t"
"rorl $16, %0 \n\t"
"rorw $8, %w0"
: "+r"(x));
#endif
#elif defined(ARCH_SH4)
__asm__("swap.b %0,%0\n"
"swap.w %0,%0\n"
"swap.b %0,%0\n"
: "=r"(x) : "0"(x));
#elif defined(HAVE_ARMV6)
__asm__("rev %0, %0" : "+r"(x));
#elif defined(ARCH_ARMV4L)
uint32_t t;
__asm__ ("eor %1, %0, %0, ror #16 \n\t"
"bic %1, %1, #0xFF0000 \n\t"
"mov %0, %0, ror #8 \n\t"
"eor %0, %0, %1, lsr #8 \n\t"
: "+r"(x), "=&r"(t));
#elif defined(ARCH_BFIN)
unsigned tmp;
__asm__("%1 = %0 >> 8 (V); \n\t"
"%0 = %0 << 8 (V); \n\t"
"%0 = %0 | %1; \n\t"
"%0 = PACK(%0.L, %0.H); \n\t"
: "+d"(x), "=&d"(tmp));
#else
x= ((x<<8)&0xFF00FF00) | ((x>>8)&0x00FF00FF);
x= (x>>16) | (x<<16);
#endif
return x;
}
#endif
#ifndef bswap_64
static inline uint64_t av_const bswap_64(uint64_t x)
{
#if 0
x= ((x<< 8)&0xFF00FF00FF00FF00ULL) | ((x>> 8)&0x00FF00FF00FF00FFULL);
x= ((x<<16)&0xFFFF0000FFFF0000ULL) | ((x>>16)&0x0000FFFF0000FFFFULL);
return (x>>32) | (x<<32);
#elif defined(ARCH_X86_64)
__asm__("bswap %0": "=r" (x) : "0" (x));
return x;
#else
union {
uint64_t ll;
@ -103,6 +75,7 @@ static inline uint64_t av_const bswap_64(uint64_t x)
return r.ll;
#endif
}
#endif
// be2me ... BigEndian to MachineEndian
// le2me ... LittleEndian to MachineEndian