Update copyright notices to add year 2010.

[deliverable/binutils-gdb.git] / sim / d10v / endian.c

diff --git a/sim/d10v/endian.c b/sim/d10v/endian.c
index 929edc9317c2c0eebdb4b88c67ecc8bb05d01591..9ef503eb0e2b67d9518cd2ed4595a1b3e33f061d 100644 (file)
--- a/sim/d10v/endian.c
+++ b/sim/d10v/endian.c
@@ -1,39 +1,94 @@
+/* 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 = ((uint32)x[0]<<24) + ((uint32)x[1]<<16) + ((uint32)x[2]<<8) + ((uint32)x[3]);
-  uint32 bottom = ((uint32)x[4]<<24) + ((uint32)x[5]<<16) + ((uint32)x[6]<<8) + ((uint32)x[7]);
+  uint32 top = get_longword (x);
+  uint32 bottom = get_longword (x+4);
   return (((int64)top)<<32) | (int64)bottom;
 }
 
-ENDIAN_INLINE uint16
-get_word (x)
-      uint8 *x;
-{
-  return ((uint16)x[0]<<8) + x[1];
-}
-
 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
@@ -41,10 +96,35 @@ 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
@@ -52,12 +132,6 @@ write_longlong (addr, data)
      uint8 *addr;
      int64 data;
 {
-  addr[0] = data >> 56;
-  addr[1] = (data >> 48) & 0xff;
-  addr[2] = (data >> 40) & 0xff;
-  addr[3] = (data >> 32) & 0xff;
-  addr[4] = (data >> 24) & 0xff;
-  addr[5] = (data >> 16) & 0xff;
-  addr[6] = (data >> 8) & 0xff;
-  addr[7] = data & 0xff;
+  write_longword (addr, (uint32)(data >> 32));
+  write_longword (addr+4, (uint32)data);
 }