diff options
Diffstat (limited to 'compat/bswap.h')
| -rw-r--r-- | compat/bswap.h | 47 |
1 files changed, 25 insertions, 22 deletions
diff --git a/compat/bswap.h b/compat/bswap.h index 7d063e9e40..512f6f4b99 100644 --- a/compat/bswap.h +++ b/compat/bswap.h @@ -1,3 +1,6 @@ +#ifndef COMPAT_BSWAP_H +#define COMPAT_BSWAP_H + /* * Let's make sure we always have a sane definition for ntohl()/htonl(). * Some libraries define those as a function call, just to perform byte @@ -71,7 +74,7 @@ static inline uint64_t git_bswap64(uint64_t x) } #endif -#elif defined(_MSC_VER) && (defined(_M_IX86) || defined(_M_X64)) +#elif defined(_MSC_VER) && (defined(_M_IX86) || defined(_M_X64) || defined(_M_ARM64)) #include <stdlib.h> @@ -142,26 +145,6 @@ static inline uint64_t git_bswap64(uint64_t x) #endif -/* - * Performance might be improved if the CPU architecture is OK with - * unaligned 32-bit loads and a fast ntohl() is available. - * Otherwise fall back to byte loads and shifts which is portable, - * and is faster on architectures with memory alignment issues. - */ - -#if !defined(NO_UNALIGNED_LOADS) && ( \ - defined(__i386__) || defined(__x86_64__) || \ - defined(_M_IX86) || defined(_M_X64) || \ - defined(__ppc__) || defined(__ppc64__) || \ - defined(__powerpc__) || defined(__powerpc64__) || \ - defined(__s390__) || defined(__s390x__)) - -#define get_be16(p) ntohs(*(unsigned short *)(p)) -#define get_be32(p) ntohl(*(unsigned int *)(p)) -#define put_be32(p, v) do { *(unsigned int *)(p) = htonl(v); } while (0) - -#else - static inline uint16_t get_be16(const void *ptr) { const unsigned char *p = ptr; @@ -178,6 +161,13 @@ static inline uint32_t get_be32(const void *ptr) (uint32_t)p[3] << 0; } +static inline uint64_t get_be64(const void *ptr) +{ + const unsigned char *p = ptr; + return (uint64_t)get_be32(&p[0]) << 32 | + (uint64_t)get_be32(&p[4]) << 0; +} + static inline void put_be32(void *ptr, uint32_t value) { unsigned char *p = ptr; @@ -187,4 +177,17 @@ static inline void put_be32(void *ptr, uint32_t value) p[3] = value >> 0; } -#endif +static inline void put_be64(void *ptr, uint64_t value) +{ + unsigned char *p = ptr; + p[0] = value >> 56; + p[1] = value >> 48; + p[2] = value >> 40; + p[3] = value >> 32; + p[4] = value >> 24; + p[5] = value >> 16; + p[6] = value >> 8; + p[7] = value >> 0; +} + +#endif /* COMPAT_BSWAP_H */ |