diff options
author | Richard Henderson <rth@twiddle.net> | 2013-01-04 16:39:28 -0800 |
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committer | Blue Swirl <blauwirbel@gmail.com> | 2013-01-12 12:24:07 +0000 |
commit | 7db2145a6826b14efceb8dd64bfe6ad8647072eb (patch) | |
tree | 982400542735620040552a54e264f006409d6a58 /include/qemu/bswap.h | |
parent | cdfe2851c6c33c133bd90c2643cb0486c0f5b325 (diff) | |
download | hqemu-7db2145a6826b14efceb8dd64bfe6ad8647072eb.zip hqemu-7db2145a6826b14efceb8dd64bfe6ad8647072eb.tar.gz |
bswap: Add host endian unaligned access functions
Signed-off-by: Richard Henderson <rth@twiddle.net>
Signed-off-by: Blue Swirl <blauwirbel@gmail.com>
Diffstat (limited to 'include/qemu/bswap.h')
-rw-r--r-- | include/qemu/bswap.h | 51 |
1 files changed, 50 insertions, 1 deletions
diff --git a/include/qemu/bswap.h b/include/qemu/bswap.h index b2a8f94..381554b 100644 --- a/include/qemu/bswap.h +++ b/include/qemu/bswap.h @@ -226,6 +226,8 @@ static inline uint32_t qemu_bswap_len(uint32_t value, int len) return bswap32(value) >> (32 - 8 * len); } +/* Unions for reinterpreting between floats and integers. */ + typedef union { float32 f; uint32_t l; @@ -309,7 +311,7 @@ typedef union { * q: 64 bits * * endian is: - * (empty): 8 bit access + * (empty): host endian * be : big endian * le : little endian */ @@ -328,6 +330,53 @@ static inline void stb_p(void *ptr, int v) *(uint8_t *)ptr = v; } +/* Any compiler worth its salt will turn these memcpy into native unaligned + operations. Thus we don't need to play games with packed attributes, or + inline byte-by-byte stores. */ + +static inline int lduw_p(const void *ptr) +{ + uint16_t r; + memcpy(&r, ptr, sizeof(r)); + return r; +} + +static inline int ldsw_p(const void *ptr) +{ + int16_t r; + memcpy(&r, ptr, sizeof(r)); + return r; +} + +static inline void stw_p(void *ptr, uint16_t v) +{ + memcpy(ptr, &v, sizeof(v)); +} + +static inline int ldl_p(const void *ptr) +{ + int32_t r; + memcpy(&r, ptr, sizeof(r)); + return r; +} + +static inline void stl_p(void *ptr, uint32_t v) +{ + memcpy(ptr, &v, sizeof(v)); +} + +static inline uint64_t ldq_p(const void *ptr) +{ + uint64_t r; + memcpy(&r, ptr, sizeof(r)); + return r; +} + +static inline void stq_p(void *ptr, uint64_t v) +{ + memcpy(ptr, &v, sizeof(v)); +} + /* NOTE: on arm, putting 2 in /proc/sys/debug/alignment so that the kernel handles unaligned load/stores may give better results, but it is a system wide setting : bad */ |