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Proper endian swapping on older PPC ISAs

This commit is contained in:
Jeffrey Pfau 2014-09-30 10:08:43 +00:00
parent d8b0bba968
commit 6672aebfe4
1 changed files with 38 additions and 5 deletions
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43
src/arm/common.h
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@ -16,11 +16,44 @@
#define UNUSED(V) (void)(V)
#ifdef __POWERPC__
#define LOAD_32(DEST, ADDR, ARR) asm("lwbrx %0, %1, %2" : "=r"(DEST) : "r"(ADDR), "r"(ARR))
#define LOAD_16(DEST, ADDR, ARR) asm("lhbrx %0, %1, %2" : "=r"(DEST) : "r"(ADDR), "r"(ARR))
#define STORE_32(SRC, ADDR, ARR) asm("stwbrx %0, %1, %2" : : "r"(SRC), "r"(ADDR), "r"(ARR))
#define STORE_16(SRC, ADDR, ARR) asm("sthbrx %0, %1, %2" : : "r"(SRC), "r"(ADDR), "r"(ARR))
#ifdef __BIG_ENDIAN__
#if defined(__PPC__) || defined(__POWERPC__)
#define SWAP_32(DEST, VAR) asm(\
"rlwinm %0, %1, 8, 24, 31\n" \
"rlwimi %0, %1, 24, 16, 23\n" \
"rlwimi %0, %1, 8, 8, 15\n" \
"rlwimi %0, %1, 24, 0, 7\n" \
: "+r"(DEST) : "r"(VAR) : )
#define SWAP_16(DEST, VAR) asm(\
"rlwinm %0, %1, 24, 24, 31\n" \
"rlwimi %0, %1, 8, 16, 23\n" \
: "+r"(DEST) : "r"(VAR) : )
#endif
#define LOAD_32(DEST, ADDR, ARR) { \
uint32_t _tmp = ((uint32_t*) ARR)[(ADDR) >> 2]; \
SWAP_32(DEST, _tmp); \
}
#define LOAD_16(DEST, ADDR, ARR) { \
uint16_t _tmp = ((uint16_t*) ARR)[(ADDR) >> 1]; \
SWAP_16(DEST, _tmp); \
}
#define STORE_32(SRC, ADDR, ARR) { \
uint32_t _tmp; \
SWAP_32(_tmp, SRC); \
((uint32_t*) ARR)[(ADDR) >> 2] = _tmp; \
}
#define STORE_16(SRC, ADDR, ARR) { \
uint16_t _tmp; \
SWAP_16(_tmp, SRC); \
((uint16_t*) ARR)[(ADDR) >> 2] = _tmp; \
}
#else
#define LOAD_32(DEST, ADDR, ARR) DEST = ((uint32_t*) ARR)[(ADDR) >> 2]
#define LOAD_16(DEST, ADDR, ARR) DEST = ((uint16_t*) ARR)[(ADDR) >> 1]