diff options
Diffstat (limited to 'sim')
| -rw-r--r-- | sim/byteswap.hh | 17 |
1 files changed, 16 insertions, 1 deletions
diff --git a/sim/byteswap.hh b/sim/byteswap.hh index 0dd0ba827..a8c5da9d7 100644 --- a/sim/byteswap.hh +++ b/sim/byteswap.hh @@ -38,6 +38,10 @@ // This lets us figure out what the byte order of the host system is #if defined(linux) #include <endian.h> +// If this is a linux system, lets used the optimized definitions if they exist. +// If one doesn't exist, we pretty much get what is listed below, so it all +// works out +#include <byteswap.h> #else #include <machine/endian.h> #endif @@ -47,6 +51,9 @@ static inline uint64_t swap_byte64(uint64_t x) { +#if defined(linux) + return bswap_64(x); +#else return (uint64_t)((((uint64_t)(x) & 0xff) << 56) | ((uint64_t)(x) & 0xff00ULL) << 40 | ((uint64_t)(x) & 0xff0000ULL) << 24 | @@ -55,22 +62,30 @@ swap_byte64(uint64_t x) ((uint64_t)(x) & 0xff0000000000ULL) >> 24 | ((uint64_t)(x) & 0xff000000000000ULL) >> 40 | ((uint64_t)(x) & 0xff00000000000000ULL) >> 56) ; +#endif } static inline uint32_t swap_byte32(uint32_t x) { +#if defined(linux) + return bswap_32(x); +#else return (uint32_t)(((uint32_t)(x) & 0xff) << 24 | ((uint32_t)(x) & 0xff00) << 8 | ((uint32_t)(x) & 0xff0000) >> 8 | ((uint32_t)(x) & 0xff000000) >> 24); - +#endif } static inline uint16_t swap_byte16(uint16_t x) { +#if defined(linux) + return bswap_16(x); +#else return (uint16_t)(((uint16_t)(x) & 0xff) << 8 | ((uint16_t)(x) & 0xff00) >> 8); +#endif } //This lets the compiler figure out how to call the swap_byte functions above |