Andrew
42e77931bf
- Move source code from `trunk` into program root directory. - Update build files.
19 lines
465 B
C
19 lines
465 B
C
#include <string.h>
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void* memcpy(void* _dest, const void* _src, size_t _n)
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{
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int d0, d1, d2;
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__asm__ __volatile__(
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"rep ; movsl\n\t"
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"testb $2,%b4\n\t"
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"je 1f\n\t"
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"movsw\n"
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"1:\ttestb $1,%b4\n\t"
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"je 2f\n\t"
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"movsb\n"
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"2:"
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: "=&c"(d0), "=&D"(d1), "=&S"(d2)
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: "0"(_n / 4), "q"(_n), "1"((long)_dest), "2"((long)_src)
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: "memory");
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return (_dest);
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} |