mirror of
https://sourceware.org/git/binutils-gdb.git
synced 2024-12-12 03:43:33 +08:00
679546067e
By itself, this commit doesn't really change anything. It lays the groundwork for using the cpu state in follow up commits, both for engine state and for cpu state. Splitting things up this way so it is easier to see how things have changed.
129 lines
3.6 KiB
C
129 lines
3.6 KiB
C
/* If we're being compiled as a .c file, rather than being included in
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d10v_sim.h, then ENDIAN_INLINE won't be defined yet. */
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#ifndef ENDIAN_INLINE
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#define NO_ENDIAN_INLINE
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#include "sim-main.h"
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#define ENDIAN_INLINE
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#endif
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ENDIAN_INLINE uint16
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get_word (uint8 *x)
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{
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#if (defined(__i386__) || defined(__i486__) || defined(__i586__) || defined(__i686__)) && defined(__GNUC__)
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unsigned short word = *(unsigned short *)x;
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__asm__ ("xchgb %b0,%h0" : "=q" (word) : "0" (word));
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return word;
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#elif defined(WORDS_BIGENDIAN)
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/* It is safe to do this on big endian hosts, since the d10v requires that words be
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aligned on 16-bit boundaries. */
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return *(uint16 *)x;
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#else
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return ((uint16)x[0]<<8) + x[1];
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#endif
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}
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ENDIAN_INLINE uint32
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get_longword (uint8 *x)
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{
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#if (defined(__i486__) || defined(__i586__) || defined(__i686__)) && defined(__GNUC__) && defined(USE_BSWAP)
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unsigned int long_word = *(unsigned *)x;
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__asm__ ("bswap %0" : "=r" (long_word) : "0" (long_word));
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return long_word;
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#elif (defined(__i386__) || defined(__i486__) || defined(__i586__) || defined(__i686__)) && defined(__GNUC__)
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unsigned int long_word = *(unsigned *)x;
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__asm__("xchgb %b0,%h0\n\t" /* swap lower bytes */
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"rorl $16,%0\n\t" /* swap words */
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"xchgb %b0,%h0" /* swap higher bytes */
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:"=q" (long_word)
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: "0" (long_word));
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return long_word;
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#elif (defined(_POWER) && defined(_AIX)) || (defined(__PPC__) && defined(__BIG_ENDIAN__))
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/* Power & PowerPC computers in big endian mode can handle unaligned loads&stores */
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return *(uint32 *)x;
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#elif defined(WORDS_BIGENDIAN)
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/* long words must be aligned on at least 16-bit boundaries, so this should be safe. */
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return (((uint32) *(uint16 *)x)<<16) | ((uint32) *(uint16 *)(x+2));
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#else
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return ((uint32)x[0]<<24) + ((uint32)x[1]<<16) + ((uint32)x[2]<<8) + ((uint32)x[3]);
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#endif
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}
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ENDIAN_INLINE int64
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get_longlong (uint8 *x)
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{
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uint32 top = get_longword (x);
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uint32 bottom = get_longword (x+4);
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return (((int64)top)<<32) | (int64)bottom;
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}
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ENDIAN_INLINE void
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write_word (uint8 *addr, uint16 data)
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{
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#if (defined(__i386__) || defined(__i486__) || defined(__i586__) || defined(__i686__)) && defined(__GNUC__)
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__asm__ ("xchgb %b0,%h0" : "=q" (data) : "0" (data));
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*(uint16 *)addr = data;
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#elif defined(WORDS_BIGENDIAN)
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/* It is safe to do this on big endian hosts, since the d10v requires that words be
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aligned on 16-bit boundaries. */
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*(uint16 *)addr = data;
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#else
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addr[0] = (data >> 8) & 0xff;
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addr[1] = data & 0xff;
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#endif
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}
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ENDIAN_INLINE void
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write_longword (uint8 *addr, uint32 data)
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{
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#if (defined(__i486__) || defined(__i586__) || defined(__i686__)) && defined(__GNUC__) && defined(USE_BSWAP)
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__asm__ ("bswap %0" : "=r" (data) : "0" (data));
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*(uint32 *)addr = data;
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#elif (defined(__i386__) || defined(__i486__) || defined(__i586__) || defined(__i686__)) && defined(__GNUC__)
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__asm__("xchgb %b0,%h0\n\t" /* swap lower bytes */
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"rorl $16,%0\n\t" /* swap words */
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"xchgb %b0,%h0" /* swap higher bytes */
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:"=q" (data)
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: "0" (data));
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*(uint32 *)addr = data;
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#elif (defined(_POWER) && defined(_AIX)) || (defined(__PPC__) && defined(__BIG_ENDIAN__))
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/* Power & PowerPC computers in big endian mode can handle unaligned loads&stores */
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*(uint32 *)addr = data;
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#elif defined(WORDS_BIGENDIAN)
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*(uint16 *)addr = (uint16)(data >> 16);
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*(uint16 *)(addr + 2) = (uint16)data;
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#else
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addr[0] = (data >> 24) & 0xff;
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addr[1] = (data >> 16) & 0xff;
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addr[2] = (data >> 8) & 0xff;
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addr[3] = data & 0xff;
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#endif
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}
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ENDIAN_INLINE void
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write_longlong (uint8 *addr, int64 data)
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{
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write_longword (addr, (uint32)(data >> 32));
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write_longword (addr+4, (uint32)data);
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}
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