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Diffstat (limited to 'src/math/sf_copysign.c')
| -rw-r--r-- | src/math/sf_copysign.c | 50 |
1 files changed, 50 insertions, 0 deletions
diff --git a/src/math/sf_copysign.c b/src/math/sf_copysign.c new file mode 100644 index 00000000..f547c82e --- /dev/null +++ b/src/math/sf_copysign.c @@ -0,0 +1,50 @@ +/* sf_copysign.c -- float version of s_copysign.c. + * Conversion to float by Ian Lance Taylor, Cygnus Support, ian@cygnus.com. + */ + +/* + * ==================================================== + * Copyright (C) 1993 by Sun Microsystems, Inc. All rights reserved. + * + * Developed at SunPro, a Sun Microsystems, Inc. business. + * Permission to use, copy, modify, and distribute this + * software is freely granted, provided that this notice + * is preserved. + * ==================================================== + */ + +/* + * copysignf(float x, float y) + * copysignf(x,y) returns a value with the magnitude of x and + * with the sign bit of y. + */ + +#include "fdlibm.h" + +#ifdef __STDC__ + float copysignf(float x, float y) +#else + float copysignf(x,y) + float x,y; +#endif +{ + __uint32_t ix,iy; + GET_FLOAT_WORD(ix,x); + GET_FLOAT_WORD(iy,y); + SET_FLOAT_WORD(x,(ix&0x7fffffff)|(iy&0x80000000)); + return x; +} + +#ifdef _DOUBLE_IS_32BITS + +#ifdef __STDC__ + double copysign(double x, double y) +#else + double copysign(x,y) + double x,y; +#endif +{ + return (double) copysignf((float) x, (float) y); +} + +#endif /* defined(_DOUBLE_IS_32BITS) */ |