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| author | Joseph Myers <joseph@codesourcery.com> | 2012-03-13 14:12:44 +0000 |
|---|---|---|
| committer | Joseph Myers <joseph@codesourcery.com> | 2012-03-13 14:12:44 +0000 |
| commit | f453b98b6bf698ddb4d49cd3dc0f94d2da2a8968 (patch) | |
| tree | b14dc65111884a7d94642b63741aa015cd41463d /sysdeps/ieee754/dbl-64/s_rint.c | |
| parent | 8e59da90ce7ef7b4226b9516116353cfceb5bb1c (diff) | |
| download | glibc-f453b98b6bf698ddb4d49cd3dc0f94d2da2a8968.tar.gz glibc-f453b98b6bf698ddb4d49cd3dc0f94d2da2a8968.tar.xz glibc-f453b98b6bf698ddb4d49cd3dc0f94d2da2a8968.zip | |
Clean up dbl-64 rint, nearbyint.
Diffstat (limited to 'sysdeps/ieee754/dbl-64/s_rint.c')
| -rw-r--r-- | sysdeps/ieee754/dbl-64/s_rint.c | 33 |
1 files changed, 3 insertions, 30 deletions
diff --git a/sysdeps/ieee754/dbl-64/s_rint.c b/sysdeps/ieee754/dbl-64/s_rint.c index c45d7848d7..8458909165 100644 --- a/sysdeps/ieee754/dbl-64/s_rint.c +++ b/sysdeps/ieee754/dbl-64/s_rint.c @@ -33,49 +33,22 @@ double __rint(double x) { 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); w = TWO52[sx]+x; t = w-TWO52[sx]; 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); w = TWO52[sx]+x; return w-TWO52[sx]; } |