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authorSiddhesh Poyarekar <siddhesh@redhat.com>2013-02-27 11:24:45 +0530
committerSiddhesh Poyarekar <siddhesh@redhat.com>2013-02-27 11:24:45 +0530
commit11d6e2f2372c4df6bc79aebf6e6f84c43dd0994d (patch)
tree949d11ca2495d90dd55853564e388c581549a4ac /sysdeps
parent90f42071e3d7d7d595fcd15c7241e7be46b2c2bd (diff)
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Format mplog.c
Diffstat (limited to 'sysdeps')
-rw-r--r--sysdeps/ieee754/dbl-64/mplog.c44
1 files changed, 23 insertions, 21 deletions
diff --git a/sysdeps/ieee754/dbl-64/mplog.c b/sysdeps/ieee754/dbl-64/mplog.c
index e3d10846e2..f8d5c1095f 100644
--- a/sysdeps/ieee754/dbl-64/mplog.c
+++ b/sysdeps/ieee754/dbl-64/mplog.c
@@ -1,4 +1,3 @@
-
/*
* IBM Accurate Mathematical Library
* written by International Business Machines Corp.
@@ -37,27 +36,30 @@
#include "endian.h"
#include "mpa.h"
-void __mpexp(mp_no *, mp_no *, int);
-
-void __mplog(mp_no *x, mp_no *y, int p) {
- int i,m;
- static const int mp[33] = {0,0,0,0,0,1,1,2,2,2,2,3,3,3,3,3,3,3,3,
- 4,4,4,4,4,4,4,4,4,4,4,4,4,4};
- mp_no mpt1,mpt2;
+void
+__mplog (mp_no *x, mp_no *y, int p)
+{
+ int i, m;
+ static const int mp[33] =
+ {
+ 0, 0, 0, 0, 0, 1, 1, 2, 2, 2, 2, 3, 3, 3, 3, 3, 3, 3, 3,
+ 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4
+ };
+ mp_no mpt1, mpt2;
- /* Choose m */
+ /* Choose m. */
m = mp[p];
- /* Perform m newton iterations to solve for y: exp(y)-x=0. */
- /* The iterations formula is: y(n+1)=y(n)+(x*exp(-y(n))-1). */
- __cpy(y,&mpt1,p);
- for (i=0; i<m; i++) {
- mpt1.d[0]=-mpt1.d[0];
- __mpexp(&mpt1,&mpt2,p);
- __mul(x,&mpt2,&mpt1,p);
- __sub(&mpt1,&mpone,&mpt2,p);
- __add(y,&mpt2,&mpt1,p);
- __cpy(&mpt1,y,p);
- }
- return;
+ /* Perform m newton iterations to solve for y: exp(y) - x = 0. The
+ iterations formula is: y(n + 1) = y(n) + (x * exp(-y(n)) - 1). */
+ __cpy (y, &mpt1, p);
+ for (i = 0; i < m; i++)
+ {
+ mpt1.d[0] = -mpt1.d[0];
+ __mpexp (&mpt1, &mpt2, p);
+ __mul (x, &mpt2, &mpt1, p);
+ __sub (&mpt1, &mpone, &mpt2, p);
+ __add (y, &mpt2, &mpt1, p);
+ __cpy (&mpt1, y, p);
+ }
}