zig/lib/libc/musl/src/math/logbl.c
Andrew Kelley 49d1a4c562 move lib dirs to lib subdir
also start prefering NtDll API. so far:
 * NtQueryInformationFile
 * NtClose

adds a performance workaround for windows unicode conversion. but that
should probably be removed before merging
2019-07-15 17:54:50 -04:00

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C
Vendored

#include <math.h>
#if LDBL_MANT_DIG == 53 && LDBL_MAX_EXP == 1024
long double logbl(long double x)
{
return logb(x);
}
#else
long double logbl(long double x)
{
if (!isfinite(x))
return x * x;
if (x == 0)
return -1/(x*x);
return ilogbl(x);
}
#endif