zig/lib/libc/mingw/math/copysign.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

22 lines
435 B
C

/**
* This file has no copyright assigned and is placed in the Public Domain.
* This file is part of the mingw-w64 runtime package.
* No warranty is given; refer to the file DISCLAIMER.PD within this package.
*/
#include <math.h>
typedef union U
{
unsigned int u[2];
double d;
} U;
double copysign(double x, double y)
{
U h,j;
h.d = x;
j.d = y;
h.u[1] = (h.u[1] & 0x7fffffff) | (j.u[1] & 0x80000000);
return h.d;
}