From b83876718b1a535ee04ca0351ad57814454ec646 Mon Sep 17 00:00:00 2001 From: Keith Packard Date: Fri, 25 Oct 2013 04:00:49 -0700 Subject: altos: Add floating point math functions from newlib These are all BSD licensed, so we can simply include them directly Signed-off-by: Keith Packard --- src/math/sf_fabs.c | 47 +++++++++++++++++++++++++++++++++++++++++++++++ 1 file changed, 47 insertions(+) create mode 100644 src/math/sf_fabs.c (limited to 'src/math/sf_fabs.c') diff --git a/src/math/sf_fabs.c b/src/math/sf_fabs.c new file mode 100644 index 00000000..2aaed326 --- /dev/null +++ b/src/math/sf_fabs.c @@ -0,0 +1,47 @@ +/* sf_fabs.c -- float version of s_fabs.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. + * ==================================================== + */ + +/* + * fabsf(x) returns the absolute value of x. + */ + +#include "fdlibm.h" + +#ifdef __STDC__ + float fabsf(float x) +#else + float fabsf(x) + float x; +#endif +{ + __uint32_t ix; + GET_FLOAT_WORD(ix,x); + SET_FLOAT_WORD(x,ix&0x7fffffff); + return x; +} + +#ifdef _DOUBLE_IS_32BITS + +#ifdef __STDC__ + double fabs(double x) +#else + double fabs(x) + double x; +#endif +{ + return (double) fabsf((float) x); +} + +#endif /* defined(_DOUBLE_IS_32BITS) */ -- cgit v1.2.3