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reorder bswap functions into bit-depth, special-casing inside the functions.

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patch by Ramiro Polla ramiro lisha ufsc br

Originally committed as revision 8823 to svn://svn.ffmpeg.org/ffmpeg/trunk
This commit is contained in:
Ramiro Polla 2007-04-26 08:20:21 +00:00 committed by Benoit Fouet
parent 853d15c2f8
commit bf5d7db5a0
1 changed files with 14 additions and 65 deletions
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79
libavutil/bswap.h
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@ -36,17 +36,23 @@
# define LEGACY_REGS "=q" # define LEGACY_REGS "=q"
#endif #endif
#if defined(ARCH_X86)
static av_always_inline uint16_t bswap_16(uint16_t x) static av_always_inline uint16_t bswap_16(uint16_t x)
{ {
#if defined(ARCH_X86)
__asm("rorw $8, %0" : __asm("rorw $8, %0" :
LEGACY_REGS (x) : LEGACY_REGS (x) :
"0" (x)); "0" (x));
#elif defined(ARCH_SH4)
__asm__("swap.b %0,%0":"=r"(x):"0"(x));
#else
x= (x>>8) | (x<<8);
#endif
return x; return x;
} }
static av_always_inline uint32_t bswap_32(uint32_t x) static av_always_inline uint32_t bswap_32(uint32_t x)
{ {
#if defined(ARCH_X86)
#if __CPU__ != 386 #if __CPU__ != 386
__asm("bswap %0": __asm("bswap %0":
"=r" (x) : "=r" (x) :
@ -57,66 +63,13 @@ static av_always_inline uint32_t bswap_32(uint32_t x)
LEGACY_REGS (x) : LEGACY_REGS (x) :
#endif #endif
"0" (x)); "0" (x));
return x;
}
static inline uint64_t bswap_64(uint64_t x)
{
#ifdef ARCH_X86_64
__asm("bswap %0":
"=r" (x) :
"0" (x));
return x;
#else
union {
uint64_t ll;
struct {
uint32_t l,h;
} l;
} r;
r.l.l = bswap_32 (x);
r.l.h = bswap_32 (x>>32);
return r.ll;
#endif
}
#elif defined(ARCH_SH4) #elif defined(ARCH_SH4)
static av_always_inline uint16_t bswap_16(uint16_t x) {
__asm__("swap.b %0,%0":"=r"(x):"0"(x));
return x;
}
static av_always_inline uint32_t bswap_32(uint32_t x) {
__asm__( __asm__(
"swap.b %0,%0\n" "swap.b %0,%0\n"
"swap.w %0,%0\n" "swap.w %0,%0\n"
"swap.b %0,%0\n" "swap.b %0,%0\n"
:"=r"(x):"0"(x)); :"=r"(x):"0"(x));
return x; #elif defined(ARCH_ARM)
}
static inline uint64_t bswap_64(uint64_t x)
{
union {
uint64_t ll;
struct {
uint32_t l,h;
} l;
} r;
r.l.l = bswap_32 (x);
r.l.h = bswap_32 (x>>32);
return r.ll;
}
#else
static av_always_inline uint16_t bswap_16(uint16_t x){
x= (x>>8) | (x<<8);
return x;
}
#ifdef ARCH_ARM
static av_always_inline uint32_t bswap_32(uint32_t x){
uint32_t t; uint32_t t;
__asm__ ( __asm__ (
"eor %1, %0, %0, ror #16 \n\t" "eor %1, %0, %0, ror #16 \n\t"
@ -124,27 +77,19 @@ static av_always_inline uint32_t bswap_32(uint32_t x){
"mov %0, %0, ror #8 \n\t" "mov %0, %0, ror #8 \n\t"
"eor %0, %0, %1, lsr #8 \n\t" "eor %0, %0, %1, lsr #8 \n\t"
: "+r"(x), "+r"(t)); : "+r"(x), "+r"(t));
return x;
}
#elif defined(ARCH_BFIN) #elif defined(ARCH_BFIN)
static av_always_inline uint32_t bswap_32(uint32_t x){
unsigned tmp; unsigned tmp;
asm("%1 = %0 >> 8 (V);\n\t" asm("%1 = %0 >> 8 (V);\n\t"
"%0 = %0 << 8 (V);\n\t" "%0 = %0 << 8 (V);\n\t"
"%0 = %0 | %1;\n\t" "%0 = %0 | %1;\n\t"
"%0 = PACK(%0.L, %0.H);\n\t" "%0 = PACK(%0.L, %0.H);\n\t"
: "+d"(x), "=&d"(tmp)); : "+d"(x), "=&d"(tmp));
return x;
}
#else #else
static av_always_inline uint32_t bswap_32(uint32_t x){
x= ((x<<8)&0xFF00FF00) | ((x>>8)&0x00FF00FF); x= ((x<<8)&0xFF00FF00) | ((x>>8)&0x00FF00FF);
x= (x>>16) | (x<<16); x= (x>>16) | (x<<16);
#endif
return x; return x;
} }
#endif
static inline uint64_t bswap_64(uint64_t x) static inline uint64_t bswap_64(uint64_t x)
{ {
@ -152,6 +97,11 @@ static inline uint64_t bswap_64(uint64_t x)
x= ((x<< 8)&0xFF00FF00FF00FF00ULL) | ((x>> 8)&0x00FF00FF00FF00FFULL); x= ((x<< 8)&0xFF00FF00FF00FF00ULL) | ((x>> 8)&0x00FF00FF00FF00FFULL);
x= ((x<<16)&0xFFFF0000FFFF0000ULL) | ((x>>16)&0x0000FFFF0000FFFFULL); x= ((x<<16)&0xFFFF0000FFFF0000ULL) | ((x>>16)&0x0000FFFF0000FFFFULL);
return (x>>32) | (x<<32); return (x>>32) | (x<<32);
#elif defined(ARCH_X86_64)
__asm("bswap %0":
"=r" (x) :
"0" (x));
return x;
#else #else
union { union {
uint64_t ll; uint64_t ll;
@ -163,7 +113,6 @@ static inline uint64_t bswap_64(uint64_t x)
return r.ll; return r.ll;
#endif #endif
} }
#endif /* defined(ARCH_X86) */
#endif /* !HAVE_BYTESWAP_H */ #endif /* !HAVE_BYTESWAP_H */