contrib/restricted/emscripten/system/lib/libc/musl/src/math/copysignf.c


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#include <math.h>
#include <stdint.h>

float copysignf(float x, float y)
{
// XXX EMSCRIPTEN: use the wasm instruction via clang builtin
// See https://github.com/emscripten-core/emscripten/issues/9236
#ifdef __wasm__
	return __builtin_copysignf(x, y);
#else
	union {float f; uint32_t i;} ux={x}, uy={y};
	ux.i &= 0x7fffffff;
	ux.i |= uy.i & 0x80000000;
	return ux.f;
#endif
}