diff options
Diffstat (limited to 'REORG.TODO/sysdeps/ieee754/flt-32/s_rintf.c')
| -rw-r--r-- | REORG.TODO/sysdeps/ieee754/flt-32/s_rintf.c | 50 |
1 files changed, 50 insertions, 0 deletions
diff --git a/REORG.TODO/sysdeps/ieee754/flt-32/s_rintf.c b/REORG.TODO/sysdeps/ieee754/flt-32/s_rintf.c new file mode 100644 index 0000000000..8a907488f7 --- /dev/null +++ b/REORG.TODO/sysdeps/ieee754/flt-32/s_rintf.c @@ -0,0 +1,50 @@ +/* s_rintf.c -- float version of s_rint.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. + * ==================================================== + */ + +#include <math.h> +#include <math_private.h> + +static const float +TWO23[2]={ + 8.3886080000e+06, /* 0x4b000000 */ + -8.3886080000e+06, /* 0xcb000000 */ +}; + +float +__rintf(float x) +{ + int32_t i0,j0,sx; + float w,t; + GET_FLOAT_WORD(i0,x); + sx = (i0>>31)&1; + j0 = ((i0>>23)&0xff)-0x7f; + if(j0<23) { + if(j0<0) { + w = TWO23[sx]+x; + t = w-TWO23[sx]; + GET_FLOAT_WORD(i0,t); + SET_FLOAT_WORD(t,(i0&0x7fffffff)|(sx<<31)); + return t; + } + } else { + if(j0==0x80) return x+x; /* inf or NaN */ + else return x; /* x is integral */ + } + w = TWO23[sx]+x; + return w-TWO23[sx]; +} +#ifndef __rintf +weak_alias (__rintf, rintf) +#endif |