alexvoste
14 lines
272 B
C
14 lines
272 B
C
#include <math.h>
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#include <stdint.h>
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int isinf(double x) {
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union {
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double f;
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uint64_t i;
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} u = { .f = x };
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uint64_t exp = (u.i >> 52) & 0x7FF;
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uint64_t mantissa = u.i & 0xFFFFFFFFFFFFFULL;
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return (exp == 0x7FF) && (mantissa == 0);
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} |