diff options
| author | Ulrich Drepper <drepper@redhat.com> | 2004-06-17 23:58:15 +0000 |
|---|---|---|
| committer | Ulrich Drepper <drepper@redhat.com> | 2004-06-17 23:58:15 +0000 |
| commit | 7c370086323e3915607c4b1021c817746ac991c9 (patch) | |
| tree | ab382b3dea191b708ddde13b151473764337ffb9 /sysdeps/ieee754 | |
| parent | c7be5c15e2fbccdc00b970c3b5b9c27e95dee5be (diff) | |
Update.
2004-06-13 Kaz Kojima <kkojima@rr.iij4u.or.jp>
* sysdeps/unix/sysv/linux/sh/bits/pthreadtypes.h (pthread_cond_t):
Add __data.__futex field, reshuffle __data.__clock.
* sysdeps/unix/sysv/linux/sh/pthread_cond_signal.S
(__pthread_cond_signal): Increment __futex at the same time as
__wakeup_seq or __total_seq. Pass address of __futex instead of
address of low 32-bits of __wakeup_seq to futex syscall.
* sysdeps/unix/sysv/linux/sh/pthread_cond_wait.S
(__pthread_cond_wait): Likewise. Pass __futex value from before
releasing internal lock to FUTEX_WAIT.
* sysdeps/unix/sysv/linux/sh/pthread_cond_timedwait.S
(__pthread_cond_timedwait): Likewise.
* sysdeps/unix/sysv/linux/sh/pthread_cond_broadcast.S
(FUTEX_CMP_REQUEUE): Define.
(__pthread_cond_broadcast): Set __futex to 2 * __total_seq.
Use FUTEX_CMP_REQUEUE operation instead of FUTEX_REQUEUE.
Pass __futex value from before the unlock and __futex address instead
of address of low 32-bits of __wakeup_seq to futex syscall.
Fallback to FUTEX_WAKE all on any errors.
Diffstat (limited to 'sysdeps/ieee754')
| -rw-r--r-- | sysdeps/ieee754/dbl-64/e_sqrt.c | 17 |
1 files changed, 7 insertions, 10 deletions
diff --git a/sysdeps/ieee754/dbl-64/e_sqrt.c b/sysdeps/ieee754/dbl-64/e_sqrt.c index 15ba98d5e7..f7e8055491 100644 --- a/sysdeps/ieee754/dbl-64/e_sqrt.c +++ b/sysdeps/ieee754/dbl-64/e_sqrt.c @@ -41,7 +41,7 @@ #include "math_private.h" /*********************************************************************/ -/* An ultimate aqrt routine. Given an IEEE double machine number x */ +/* An ultimate sqrt routine. Given an IEEE double machine number x */ /* it computes the correctly rounded (to nearest) value of square */ /* root of x. */ /*********************************************************************/ @@ -52,7 +52,7 @@ double __ieee754_sqrt(double x) { rt1 = 4.99999999495955425917856814202739E-01, rt2 = 3.75017500867345182581453026130850E-01, rt3 = 3.12523626554518656309172508769531E-01; - static const double big = 134217728.0, big1 = 134217729.0; + static const double big = 134217728.0; double y,t,del,res,res1,hy,z,zz,p,hx,tx,ty,s; mynumber a,c={{0,0}}; int4 k; @@ -79,13 +79,10 @@ double __ieee754_sqrt(double x) { } } else { - if (k>0x7ff00000) /* x -> infinity */ - return (big1-big1)/(big-big); - if (k<0x00100000) { /* x -> -infinity */ - if (x==0) return x; - if (k<0) return (big1-big1)/(big-big); - else return tm256.x*__ieee754_sqrt(x*t512.x); - } - else return (a.i[LOW_HALF]==0)?x:(big1-big1)/(big-big); + if ((k & 0x7ff00000) == 0x7ff00000) + return x*x+x; /* sqrt(NaN)=NaN, sqrt(+inf)=+inf, sqrt(-inf)=sNaN */ + if (x==0) return x; /* sqrt(+0)=+0, sqrt(-0)=-0 */ + if (k<0) return (x-x)/(x-x); /* sqrt(-ve)=sNaN */ + return tm256.x*__ieee754_sqrt(x*t512.x); } } |