diff options
Diffstat (limited to 'src/core')
| -rw-r--r-- | src/core/defs.h | 63 |
1 files changed, 63 insertions, 0 deletions
diff --git a/src/core/defs.h b/src/core/defs.h index f1947fe9..6050782b 100644 --- a/src/core/defs.h +++ b/src/core/defs.h @@ -121,6 +121,54 @@ typedef void (*nni_cb)(void *); (((uint64_t) ((uint8_t) (ptr)[6])) << 8u) + \ (((uint64_t) (uint8_t) (ptr)[7])) +// Modern CPUs are all little endian. Let's stop paying the endian tax. + +#define NNI_PUT16LE(ptr, u) \ + do { \ + (ptr)[1] = (uint8_t) (((uint16_t) (u)) >> 8u); \ + (ptr)[0] = (uint8_t) ((uint16_t) (u)); \ + } while (0) + +#define NNI_PUT32LE(ptr, u) \ + do { \ + (ptr)[3] = (uint8_t) (((uint32_t) (u)) >> 24u); \ + (ptr)[2] = (uint8_t) (((uint32_t) (u)) >> 16u); \ + (ptr)[1] = (uint8_t) (((uint32_t) (u)) >> 8u); \ + (ptr)[0] = (uint8_t) ((uint32_t) (u)); \ + } while (0) + +#define NNI_PUT64LE(ptr, u) \ + do { \ + (ptr)[7] = (uint8_t) (((uint64_t) (u)) >> 56u); \ + (ptr)[6] = (uint8_t) (((uint64_t) (u)) >> 48u); \ + (ptr)[5] = (uint8_t) (((uint64_t) (u)) >> 40u); \ + (ptr)[4] = (uint8_t) (((uint64_t) (u)) >> 32u); \ + (ptr)[3] = (uint8_t) (((uint64_t) (u)) >> 24u); \ + (ptr)[2] = (uint8_t) (((uint64_t) (u)) >> 16u); \ + (ptr)[1] = (uint8_t) (((uint64_t) (u)) >> 8u); \ + (ptr)[0] = (uint8_t) ((uint64_t) (u)); \ + } while (0) + +#define NNI_GET16LE(ptr, v) \ + v = (((uint16_t) ((uint8_t) (ptr)[1])) << 8u) + \ + (((uint16_t) (uint8_t) (ptr)[0])) + +#define NNI_GET32LE(ptr, v) \ + v = (((uint32_t) ((uint8_t) (ptr)[3])) << 24u) + \ + (((uint32_t) ((uint8_t) (ptr)[2])) << 16u) + \ + (((uint32_t) ((uint8_t) (ptr)[1])) << 8u) + \ + (((uint32_t) (uint8_t) (ptr)[0])) + +#define NNI_GET64LE(ptr, v) \ + v = (((uint64_t) ((uint8_t) (ptr)[7])) << 56u) + \ + (((uint64_t) ((uint8_t) (ptr)[6])) << 48u) + \ + (((uint64_t) ((uint8_t) (ptr)[5])) << 40u) + \ + (((uint64_t) ((uint8_t) (ptr)[4])) << 32u) + \ + (((uint64_t) ((uint8_t) (ptr)[3])) << 24u) + \ + (((uint64_t) ((uint8_t) (ptr)[2])) << 16u) + \ + (((uint64_t) ((uint8_t) (ptr)[1])) << 8u) + \ + (((uint64_t) (uint8_t) (ptr)[0])) + // This increments a pointer a fixed number of byte cells. #define NNI_INCPTR(ptr, n) ((ptr) = (void *) ((char *) (ptr) + (n))) @@ -178,4 +226,19 @@ typedef nni_type nni_opt_type; (__GNUC__ * 10000 + __GNUC_MINOR__ * 100 + __GNUC_PATCHLEVEL__) #endif +#if !defined(NNG_BIG_ENDIAN) && !defined(NNG_LITTLE_ENDIAN) +#if defined(__BYTE_ORDER__) +#if __BYTE_ORDER__ == __ORDER_BIG_ENDIAN__ +#define NNG_BIG_ENDIAN 1 +#elif __BYTE_ORDER__ == __ORDER_LITTLE_ENDIAN__ +#define NNG_LITTLE_ENDIAN 1 +#else // middle-endian? (aka PDP-11) +#error "Unsupported or unknown endian" +#endif // __BYTE_ORDER__ +#else // defined(__BYTE_ORDER__) +#define NNG_LITTLE_ENDIAN 1 +#error "Unknown endian: specify -DNNG_BIG_ENDIAN=1 or -DNNG_LITTLE_ENDIAN=1" +#endif // defined(__BYTE_ORDER) +#endif // defined() endianness + #endif // CORE_DEFS_H |