diff options
Diffstat (limited to 'cpukit/score/cpu/v850/rtems/score/cpu.h')
| -rw-r--r-- | cpukit/score/cpu/v850/rtems/score/cpu.h | 31 |
1 files changed, 25 insertions, 6 deletions
diff --git a/cpukit/score/cpu/v850/rtems/score/cpu.h b/cpukit/score/cpu/v850/rtems/score/cpu.h index 591af00e36..875f1607c7 100644 --- a/cpukit/score/cpu/v850/rtems/score/cpu.h +++ b/cpukit/score/cpu/v850/rtems/score/cpu.h @@ -1154,10 +1154,23 @@ static inline uint32_t CPU_swap_u32( uint32_t value ) { - unsigned int v, swapped; + unsigned int swapped; - v = value; - __asm__ __volatile__ ("bsw %0, %1" : "=r" (v), "=&r" (swapped) ); + #if (V850_HAS_BYTE_SWAP_INSTRUCTION == 1) + unsigned int v; + + v = value; + __asm__ __volatile__ ("bsw %0, %1" : "=r" (v), "=&r" (swapped) ); + #else + uint32_t byte1, byte2, byte3, byte4; + + byte4 = (value >> 24) & 0xff; + byte3 = (value >> 16) & 0xff; + byte2 = (value >> 8) & 0xff; + byte1 = value & 0xff; + + swapped = (byte1 << 24) | (byte2 << 16) | (byte3 << 8) | byte4; + #endif return swapped; } @@ -1174,10 +1187,16 @@ static inline uint32_t CPU_swap_u32( */ static inline uint16_t CPU_swap_u16( uint16_t value ) { - unsigned int v, swapped; + unsigned int swapped; + + #if (V850_HAS_BYTE_SWAP_INSTRUCTION == 1) + unsigned int v; - v = value; - __asm__ __volatile__ ("bsh %0, %1" : "=r" (v), "=&r" (swapped) ); + v = value; + __asm__ __volatile__ ("bsh %0, %1" : "=r" (v), "=&r" (swapped) ); + #else + swapped = ((value & 0xff) << 8) | ((value >> 8) & 0xff); + #endif return swapped; } |