diff options
Diffstat (limited to 'sim/d10v/endian.c')
| -rw-r--r-- | sim/d10v/endian.c | 137 |
1 files changed, 137 insertions, 0 deletions
diff --git a/sim/d10v/endian.c b/sim/d10v/endian.c new file mode 100644 index 00000000000..9ef503eb0e2 --- /dev/null +++ b/sim/d10v/endian.c @@ -0,0 +1,137 @@ +/* If we're being compiled as a .c file, rather than being included in + d10v_sim.h, then ENDIAN_INLINE won't be defined yet. */ + +#ifndef ENDIAN_INLINE +#define NO_ENDIAN_INLINE +#include "d10v_sim.h" +#define ENDIAN_INLINE +#endif + +ENDIAN_INLINE uint16 +get_word (x) + uint8 *x; +{ +#if (defined(__i386__) || defined(__i486__) || defined(__i586__) || defined(__i686__)) && defined(__GNUC__) + + unsigned short word = *(unsigned short *)x; + __asm__ ("xchgb %b0,%h0" : "=q" (word) : "0" (word)); + return word; + +#elif defined(WORDS_BIGENDIAN) + /* It is safe to do this on big endian hosts, since the d10v requires that words be + aligned on 16-bit boundaries. */ + return *(uint16 *)x; + +#else + return ((uint16)x[0]<<8) + x[1]; +#endif +} + +ENDIAN_INLINE uint32 +get_longword (x) + uint8 *x; +{ +#if (defined(__i486__) || defined(__i586__) || defined(__i686__)) && defined(__GNUC__) && defined(USE_BSWAP) + + unsigned int long_word = *(unsigned *)x; + __asm__ ("bswap %0" : "=r" (long_word) : "0" (long_word)); + return long_word; + +#elif (defined(__i386__) || defined(__i486__) || defined(__i586__) || defined(__i686__)) && defined(__GNUC__) + + unsigned int long_word = *(unsigned *)x; + __asm__("xchgb %b0,%h0\n\t" /* swap lower bytes */ + "rorl $16,%0\n\t" /* swap words */ + "xchgb %b0,%h0" /* swap higher bytes */ + :"=q" (long_word) + : "0" (long_word)); + + return long_word; + +#elif (defined(_POWER) && defined(_AIX)) || (defined(__PPC__) && defined(__BIG_ENDIAN__)) + /* Power & PowerPC computers in big endian mode can handle unaligned loads&stores */ + return *(uint32 *)x; + +#elif defined(WORDS_BIGENDIAN) + /* long words must be aligned on at least 16-bit boundaries, so this should be safe. */ + return (((uint32) *(uint16 *)x)<<16) | ((uint32) *(uint16 *)(x+2)); + +#else + return ((uint32)x[0]<<24) + ((uint32)x[1]<<16) + ((uint32)x[2]<<8) + ((uint32)x[3]); +#endif +} + +ENDIAN_INLINE int64 +get_longlong (x) + uint8 *x; +{ + uint32 top = get_longword (x); + uint32 bottom = get_longword (x+4); + return (((int64)top)<<32) | (int64)bottom; +} + +ENDIAN_INLINE void +write_word (addr, data) + uint8 *addr; + uint16 data; +{ +#if (defined(__i386__) || defined(__i486__) || defined(__i586__) || defined(__i686__)) && defined(__GNUC__) + + __asm__ ("xchgb %b0,%h0" : "=q" (data) : "0" (data)); + *(uint16 *)addr = data; + +#elif defined(WORDS_BIGENDIAN) + /* It is safe to do this on big endian hosts, since the d10v requires that words be + aligned on 16-bit boundaries. */ + *(uint16 *)addr = data; + +#else + addr[0] = (data >> 8) & 0xff; + addr[1] = data & 0xff; +#endif +} + +ENDIAN_INLINE void +write_longword (addr, data) + uint8 *addr; + uint32 data; +{ +#if (defined(__i486__) || defined(__i586__) || defined(__i686__)) && defined(__GNUC__) && defined(USE_BSWAP) + + __asm__ ("bswap %0" : "=r" (data) : "0" (data)); + *(uint32 *)addr = data; + +#elif (defined(__i386__) || defined(__i486__) || defined(__i586__) || defined(__i686__)) && defined(__GNUC__) + + __asm__("xchgb %b0,%h0\n\t" /* swap lower bytes */ + "rorl $16,%0\n\t" /* swap words */ + "xchgb %b0,%h0" /* swap higher bytes */ + :"=q" (data) + : "0" (data)); + + *(uint32 *)addr = data; + +#elif (defined(_POWER) && defined(_AIX)) || (defined(__PPC__) && defined(__BIG_ENDIAN__)) + /* Power & PowerPC computers in big endian mode can handle unaligned loads&stores */ + *(uint32 *)addr = data; + +#elif defined(WORDS_BIGENDIAN) + *(uint16 *)addr = (uint16)(data >> 16); + *(uint16 *)(addr + 2) = (uint16)data; + +#else + addr[0] = (data >> 24) & 0xff; + addr[1] = (data >> 16) & 0xff; + addr[2] = (data >> 8) & 0xff; + addr[3] = data & 0xff; +#endif +} + +ENDIAN_INLINE void +write_longlong (addr, data) + uint8 *addr; + int64 data; +{ + write_longword (addr, (uint32)(data >> 32)); + write_longword (addr+4, (uint32)data); +} |