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Add a missing check that __uint128_t exists before using it. #243

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Mar 17, 2024
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Add a missing check that __uint128_t exists before using it. #243

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2 changes: 1 addition & 1 deletion include/fast_float/float_common.h
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Original file line number Diff line number Diff line change
Expand Up @@ -331,7 +331,7 @@ value128 full_multiplication(uint64_t a, uint64_t b) {
answer.low = a * b;
#elif defined(FASTFLOAT_32BIT) || (defined(_WIN64) && !defined(__clang__))
answer.low = _umul128(a, b, &answer.high); // _umul128 not available on ARM64
#elif defined(FASTFLOAT_64BIT)
#elif defined(FASTFLOAT_64BIT) && defined(__SIZEOF_INT128__)
__uint128_t r = ((__uint128_t)a) * b;
answer.low = uint64_t(r);
answer.high = uint64_t(r >> 64);
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