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Format slowexp.c

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Siddhesh Poyarekar 2013-02-25 16:13:35 +05:30
parent 8930ddc705
commit 2f22a1e8dd
2 changed files with 29 additions and 22 deletions
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3
ChangeLog
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@ -1,5 +1,8 @@
2013-02-25 Siddhesh Poyarekar <siddhesh@redhat.com>
* sysdeps/ieee754/dbl-64/slowexp.c: Reformat in GNU coding
style.
* sysdeps/ieee754/dbl-64/slowpow.c: Reformat in GNU coding
style.

48
sysdeps/ieee754/dbl-64/slowexp.c
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@ -34,32 +34,36 @@
# define SECTION
#endif
void __mpexp(mp_no *x, mp_no *y, int p);
void __mpexp (mp_no *x, mp_no *y, int p);
/*Converting from double precision to Multi-precision and calculating e^x */
double
SECTION
__slowexp(double x) {
double w,z,res,eps=3.0e-26;
__slowexp (double x)
{
double w, z, res, eps = 3.0e-26;
int p;
mp_no mpx, mpy, mpz,mpw,mpeps,mpcor;
mp_no mpx, mpy, mpz, mpw, mpeps, mpcor;
p=6;
__dbl_mp(x,&mpx,p); /* Convert a double precision number x */
/* into a multiple precision number mpx with prec. p. */
__mpexp(&mpx, &mpy, p); /* Multi-Precision exponential function */
__dbl_mp(eps,&mpeps,p);
__mul(&mpeps,&mpy,&mpcor,p);
__add(&mpy,&mpcor,&mpw,p);
__sub(&mpy,&mpcor,&mpz,p);
__mp_dbl(&mpw, &w, p);
__mp_dbl(&mpz, &z, p);
if (w == z) return w;
else { /* if calculating is not exactly */
p = 32;
__dbl_mp(x,&mpx,p);
__mpexp(&mpx, &mpy, p);
__mp_dbl(&mpy, &res, p);
return res;
}
/* Use the multiple precision __MPEXP function to compute the exponential
First at 144 bits and if it is not accurate enough, at 768 bits. */
p = 6;
__dbl_mp (x, &mpx, p);
__mpexp (&mpx, &mpy, p);
__dbl_mp (eps, &mpeps, p);
__mul (&mpeps, &mpy, &mpcor, p);
__add (&mpy, &mpcor, &mpw, p);
__sub (&mpy, &mpcor, &mpz, p);
__mp_dbl (&mpw, &w, p);
__mp_dbl (&mpz, &z, p);
if (w == z)
return w;
else
{
p = 32;
__dbl_mp (x, &mpx, p);
__mpexp (&mpx, &mpy, p);
__mp_dbl (&mpy, &res, p);
return res;
}
}