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24 lines
559 B
C
24 lines
559 B
C
#ifndef COSMOPOLITAN_LIBC_FMT_DIVMOD10_H_
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#define COSMOPOLITAN_LIBC_FMT_DIVMOD10_H_
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forceinline uint64_t __divmod10(uint64_t __x, unsigned *__r) {
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#if !defined(__GNUC__) || (defined(__OPTIMIZE__) && !defined(__OPTIMIZE_SIZE__))
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*__r = __x % 10;
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return __x / 10;
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#else
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unsigned __int128 __dw;
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unsigned long long __hi, __rm;
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__dw = __x;
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__dw *= 0xcccccccccccccccdull;
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__hi = __dw >> 64;
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__hi >>= 3;
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__rm = __hi;
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__rm += __rm << 2;
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__rm += __rm;
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*__r = __x - __rm;
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return __hi;
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#endif
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}
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#endif /* COSMOPOLITAN_LIBC_FMT_DIVMOD10_H_ */
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