diff options
Diffstat (limited to 'sysdeps/ieee754/dbl-64/s_nearbyint.c')
| -rw-r--r-- | sysdeps/ieee754/dbl-64/s_nearbyint.c | 37 |
1 files changed, 5 insertions, 32 deletions
diff --git a/sysdeps/ieee754/dbl-64/s_nearbyint.c b/sysdeps/ieee754/dbl-64/s_nearbyint.c index 184fa70177..60afafdedd 100644 --- a/sysdeps/ieee754/dbl-64/s_nearbyint.c +++ b/sysdeps/ieee754/dbl-64/s_nearbyint.c @@ -25,8 +25,8 @@ static char rcsid[] = "$NetBSD: s_rint.c,v 1.8 1995/05/10 20:48:04 jtc Exp $"; */ #include <fenv.h> -#include "math.h" -#include "math_private.h" +#include <math.h> +#include <math_private.h> static const double TWO52[2]={ @@ -38,18 +38,12 @@ double __nearbyint(double x) { fenv_t env; int32_t i0,j0,sx; - u_int32_t i,i1; double w,t; - EXTRACT_WORDS(i0,i1,x); + GET_HIGH_WORD(i0,x); sx = (i0>>31)&1; j0 = ((i0>>20)&0x7ff)-0x3ff; - if(j0<20) { + if(j0<52) { if(j0<0) { - if(((i0&0x7fffffff)|i1)==0) return x; - i1 |= (i0&0x0fffff); - i0 &= 0xfffe0000; - i0 |= ((i1|-i1)>>12)&0x80000; - SET_HIGH_WORD(x,i0); feholdexcept (&env); w = TWO52[sx]+x; t = w-TWO52[sx]; @@ -57,32 +51,11 @@ double __nearbyint(double x) GET_HIGH_WORD(i0,t); SET_HIGH_WORD(t,(i0&0x7fffffff)|(sx<<31)); return t; - } else { - i = (0x000fffff)>>j0; - if(((i0&i)|i1)==0) return x; /* x is integral */ - i>>=1; - if(((i0&i)|i1)!=0) { - if (j0==19) - i1 = 0x40000000; - else if (j0<18) - i0 = (i0&(~i))|((0x20000)>>j0); - else - { - i0 &= ~i; - i1 = 0x80000000; - } - } } - } else if (j0>51) { + } else { if(j0==0x400) return x+x; /* inf or NaN */ else return x; /* x is integral */ - } else { - i = ((u_int32_t)(0xffffffff))>>(j0-20); - if((i1&i)==0) return x; /* x is integral */ - i>>=1; - if((i1&i)!=0) i1 = (i1&(~i))|((0x40000000)>>(j0-20)); } - INSERT_WORDS(x,i0,i1); feholdexcept (&env); w = TWO52[sx]+x; t = w-TWO52[sx]; |