1 /* origin: FreeBSD /usr/src/lib/msun/src/s_modff.c */
3 * Conversion to float by Ian Lance Taylor, Cygnus Support, ian@cygnus.com.
6 * ====================================================
7 * Copyright (C) 1993 by Sun Microsystems, Inc. All rights reserved.
9 * Developed at SunPro, a Sun Microsystems, Inc. business.
10 * Permission to use, copy, modify, and distribute this
11 * software is freely granted, provided that this notice
13 * ====================================================
18 static const float one = 1.0;
20 float modff(float x, float *iptr)
25 GET_FLOAT_WORD(i0, x);
26 j0 = ((i0>>23) & 0xff) - 0x7f; /* exponent of x */
27 if (j0 < 23) { /* integer part in x */
28 if (j0 < 0) { /* |x| < 1 */
29 SET_FLOAT_WORD(*iptr, i0 & 0x80000000); /* *iptr = +-0 */
33 if ((i0&i) == 0) { /* x is integral */
36 GET_FLOAT_WORD(ix, x);
37 SET_FLOAT_WORD(x, ix & 0x80000000); /* return +-0 */
40 SET_FLOAT_WORD(*iptr, i0&~i);
42 } else { /* no fraction part */
47 GET_FLOAT_WORD(ix, x);
48 SET_FLOAT_WORD(x, ix & 0x80000000); /* return +-0 */