newlib-cygwin/winsup/mingw/mingwex/math/llrintl.c

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#include <math.h>
long long llrintl (long double x)
{
long long retval;
__asm__ __volatile__ \
("fistpll %0" : "=m" (retval) : "t" (x) : "st"); \
return retval;
}