*/
/**
- * @file bswap.h
- * byte swap.
+ * @file
+ * byte swapping routines
*/
-#ifndef __BSWAP_H__
-#define __BSWAP_H__
+#ifndef AVUTIL_BSWAP_H
+#define AVUTIL_BSWAP_H
-#ifdef HAVE_BYTESWAP_H
-#include <byteswap.h>
-#else
+#include <stdint.h>
+#include "libavutil/avconfig.h"
+#include "attributes.h"
-#ifdef ARCH_X86_64
-# define LEGACY_REGS "=Q"
-#else
-# define LEGACY_REGS "=q"
+#ifdef HAVE_AV_CONFIG_H
+
+#include "config.h"
+
+#if ARCH_ARM
+# include "arm/bswap.h"
+#elif ARCH_AVR32
+# include "avr32/bswap.h"
+#elif ARCH_BFIN
+# include "bfin/bswap.h"
+#elif ARCH_SH4
+# include "sh4/bswap.h"
+#elif ARCH_X86
+# include "x86/bswap.h"
#endif
-static av_always_inline uint16_t bswap_16(uint16_t x)
+#endif /* HAVE_AV_CONFIG_H */
+
+#define AV_BSWAP16C(x) (((x) << 8 & 0xff00) | ((x) >> 8 & 0x00ff))
+#define AV_BSWAP32C(x) (AV_BSWAP16C(x) << 16 | AV_BSWAP16C((x) >> 16))
+#define AV_BSWAP64C(x) (AV_BSWAP32C(x) << 32 | AV_BSWAP32C((x) >> 32))
+
+#define AV_BSWAPC(s, x) AV_BSWAP##s##C(x)
+
+#ifndef av_bswap16
+static av_always_inline av_const uint16_t av_bswap16(uint16_t x)
{
-#if defined(ARCH_X86)
- __asm("rorw $8, %0" :
- LEGACY_REGS (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;
}
+#endif
-static av_always_inline uint32_t bswap_32(uint32_t x)
+#ifndef av_bswap32
+static av_always_inline av_const uint32_t av_bswap32(uint32_t x)
{
-#if defined(ARCH_X86)
-#if __CPU__ != 386
- __asm("bswap %0":
- "=r" (x) :
-#else
- __asm("xchgb %b0,%h0\n"
- " rorl $16,%0\n"
- " xchgb %b0,%h0":
- LEGACY_REGS (x) :
-#endif
- "0" (x));
-#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(ARCH_ARM)
- 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
-static inline uint64_t bswap_64(uint64_t x)
+#ifndef av_bswap64
+static inline uint64_t av_const av_bswap64(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;
uint32_t l[2];
} w, r;
w.ll = x;
- r.l[0] = bswap_32 (w.l[1]);
- r.l[1] = bswap_32 (w.l[0]);
+ r.l[0] = av_bswap32 (w.l[1]);
+ r.l[1] = av_bswap32 (w.l[0]);
return r.ll;
#endif
}
+#endif
-#endif /* !HAVE_BYTESWAP_H */
-
-// be2me ... BigEndian to MachineEndian
-// le2me ... LittleEndian to MachineEndian
+// be2ne ... big-endian to native-endian
+// le2ne ... little-endian to native-endian
-#ifdef WORDS_BIGENDIAN
-#define be2me_16(x) (x)
-#define be2me_32(x) (x)
-#define be2me_64(x) (x)
-#define le2me_16(x) bswap_16(x)
-#define le2me_32(x) bswap_32(x)
-#define le2me_64(x) bswap_64(x)
+#if AV_HAVE_BIGENDIAN
+#define av_be2ne16(x) (x)
+#define av_be2ne32(x) (x)
+#define av_be2ne64(x) (x)
+#define av_le2ne16(x) av_bswap16(x)
+#define av_le2ne32(x) av_bswap32(x)
+#define av_le2ne64(x) av_bswap64(x)
+#define AV_BE2NEC(s, x) (x)
+#define AV_LE2NEC(s, x) AV_BSWAPC(s, x)
#else
-#define be2me_16(x) bswap_16(x)
-#define be2me_32(x) bswap_32(x)
-#define be2me_64(x) bswap_64(x)
-#define le2me_16(x) (x)
-#define le2me_32(x) (x)
-#define le2me_64(x) (x)
+#define av_be2ne16(x) av_bswap16(x)
+#define av_be2ne32(x) av_bswap32(x)
+#define av_be2ne64(x) av_bswap64(x)
+#define av_le2ne16(x) (x)
+#define av_le2ne32(x) (x)
+#define av_le2ne64(x) (x)
+#define AV_BE2NEC(s, x) AV_BSWAPC(s, x)
+#define AV_LE2NEC(s, x) (x)
#endif
-#endif /* __BSWAP_H__ */
+#define AV_BE2NE16C(x) AV_BE2NEC(16, x)
+#define AV_BE2NE32C(x) AV_BE2NEC(32, x)
+#define AV_BE2NE64C(x) AV_BE2NEC(64, x)
+#define AV_LE2NE16C(x) AV_LE2NEC(16, x)
+#define AV_LE2NE32C(x) AV_LE2NEC(32, x)
+#define AV_LE2NE64C(x) AV_LE2NEC(64, x)
+
+#endif /* AVUTIL_BSWAP_H */