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Move NEG_[US]SR32 macros to mathops.h

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Originally committed as revision 21873 to svn://svn.ffmpeg.org/ffmpeg/trunk
This commit is contained in:
Måns Rullgård 2010-02-17 23:58:59 +00:00
parent dc9e57a878
commit 5e46be96f8
3 changed files with 27 additions and 21 deletions
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21
libavcodec/get_bits.h
View File

@ -49,27 +49,6 @@
# endif
#endif
#if ARCH_X86
// avoid +32 for shift optimization (gcc should do that ...)
static inline int32_t NEG_SSR32( int32_t a, int8_t s){
__asm__ ("sarl %1, %0\n\t"
: "+r" (a)
: "ic" ((uint8_t)(-s))
);
return a;
}
static inline uint32_t NEG_USR32(uint32_t a, int8_t s){
__asm__ ("shrl %1, %0\n\t"
: "+r" (a)
: "ic" ((uint8_t)(-s))
);
return a;
}
#else
# define NEG_SSR32(a,s) ((( int32_t)(a))>>(32-(s)))
# define NEG_USR32(a,s) (((uint32_t)(a))>>(32-(s)))
#endif
/* bit input */
/* buffer, buffer_end and size_in_bits must be present and used by every reader */
typedef struct GetBitContext {

8
libavcodec/mathops.h
View File

@ -131,5 +131,13 @@ if ((y) < (x)) {\
}
#endif
#ifndef NEG_SSR32
# define NEG_SSR32(a,s) ((( int32_t)(a))>>(32-(s)))
#endif
#ifndef NEG_USR32
# define NEG_USR32(a,s) (((uint32_t)(a))>>(32-(s)))
#endif
#endif /* AVCODEC_MATHOPS_H */

19
libavcodec/x86/mathops.h
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@ -78,4 +78,23 @@ __asm__ volatile(\
);
#endif
// avoid +32 for shift optimization (gcc should do that ...)
#define NEG_SSR32 NEG_SSR32
static inline int32_t NEG_SSR32( int32_t a, int8_t s){
__asm__ ("sarl %1, %0\n\t"
: "+r" (a)
: "ic" ((uint8_t)(-s))
);
return a;
}
#define NEG_USR32 NEG_USR32
static inline uint32_t NEG_USR32(uint32_t a, int8_t s){
__asm__ ("shrl %1, %0\n\t"
: "+r" (a)
: "ic" ((uint8_t)(-s))
);
return a;
}
#endif /* AVCODEC_X86_MATHOPS_H */