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author | bellard <bellard@c046a42c-6fe2-441c-8c8c-71466251a162> | 2004-08-01 21:48:12 +0000 |
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committer | bellard <bellard@c046a42c-6fe2-441c-8c8c-71466251a162> | 2004-08-01 21:48:12 +0000 |
commit | af8ffdfd2b3b0894a54cb6333217f9f3ae6eaa81 (patch) | |
tree | 8b9c400ff01f05ef0ac6c1852572e93bbfbba7de | |
parent | b932caba32c6eb627470d29e7ba1933589b4f8a0 (diff) | |
download | hqemu-af8ffdfd2b3b0894a54cb6333217f9f3ae6eaa81.zip hqemu-af8ffdfd2b3b0894a54cb6333217f9f3ae6eaa81.tar.gz |
byte swap functions
git-svn-id: svn://svn.savannah.nongnu.org/qemu/trunk@1031 c046a42c-6fe2-441c-8c8c-71466251a162
-rw-r--r-- | bswap.h | 99 |
1 files changed, 99 insertions, 0 deletions
@@ -73,4 +73,103 @@ static inline void bswap64s(uint64_t *s) *s = bswap64(*s); } +#if defined(WORDS_BIGENDIAN) +#define be_bswap(v, size) (v) +#define le_bswap(v, size) bswap ## size(v) +#define be_bswaps(v, size) +#define le_bswaps(p, size) *p = bswap ## size(*p); +#else +#define le_bswap(v, size) (v) +#define be_bswap(v, size) bswap ## size(v) +#define le_bswaps(v, size) +#define be_bswaps(p, size) *p = bswap ## size(*p); +#endif + +#define CPU_CONVERT(endian, size, type)\ +static inline type endian ## size ## _to_cpu(type v)\ +{\ + return endian ## _bswap(v, size);\ +}\ +\ +static inline type cpu_to_ ## endian ## size(type v)\ +{\ + return endian ## _bswap(v, size);\ +}\ +\ +static inline void endian ## size ## _to_cpus(type *p)\ +{\ + endian ## _bswaps(p, size)\ +}\ +\ +static inline void cpu_to_ ## endian ## size ## s(type *p)\ +{\ + endian ## _bswaps(p, size)\ +}\ +\ +static inline type endian ## size ## _to_cpup(const type *p)\ +{\ + return endian ## size ## _to_cpu(*p);\ +}\ +\ +static inline void cpu_to_ ## endian ## size ## w(type *p, type v)\ +{\ + *p = cpu_to_ ## endian ## size(v);\ +} + +CPU_CONVERT(be, 16, uint16_t) +CPU_CONVERT(be, 32, uint32_t) +CPU_CONVERT(be, 64, uint64_t) + +CPU_CONVERT(le, 16, uint16_t) +CPU_CONVERT(le, 32, uint32_t) +CPU_CONVERT(le, 64, uint64_t) + +/* unaligned versions (optimized for frequent unaligned accesses)*/ + +#if defined(__i386__) || defined(__powerpc__) + +#define cpu_to_le16wu(p, v) cpu_to_le16w(p, v) +#define cpu_to_le32wu(p, v) cpu_to_le32w(p, v) +#define le16_to_cpupu(p) le16_to_cpup(p) +#define le32_to_cpupu(p) le32_to_cpup(p) + +#else + +static inline void cpu_to_le16wu(uint16_t *p, uint16_t v) +{ + uint8_t *p1 = (uint8_t *)p; + + p1[0] = v; + p1[1] = v >> 8; +} + +static inline void cpu_to_le32wu(uint32_t *p, uint32_t v) +{ + uint8_t *p1 = (uint8_t *)p; + + p1[0] = v; + p1[1] = v >> 8; + p1[2] = v >> 16; + p1[3] = v >> 24; +} + +static inline uint16_t le16_to_cpupu(const uint16_t *p) +{ + const uint8_t *p1 = (const uint8_t *)p; + return p1[0] | (p1[1] << 8); +} + +static inline uint32_t le32_to_cpupu(const uint32_t *p) +{ + const uint8_t *p1 = (const uint8_t *)p; + return p1[0] | (p1[1] << 8) | (p1[2] << 16) | (p1[3] << 24); +} + +#endif + +#undef le_bswap +#undef be_bswap +#undef le_bswaps +#undef be_bswaps + #endif /* BSWAP_H */ |