diff options
Diffstat (limited to 'sysdeps/ieee754/dbl-64/mpatan.c')
| -rw-r--r-- | sysdeps/ieee754/dbl-64/mpatan.c | 29 |
1 files changed, 18 insertions, 11 deletions
diff --git a/sysdeps/ieee754/dbl-64/mpatan.c b/sysdeps/ieee754/dbl-64/mpatan.c index ee21c25..f40873e 100644 --- a/sysdeps/ieee754/dbl-64/mpatan.c +++ b/sysdeps/ieee754/dbl-64/mpatan.c @@ -1,8 +1,7 @@ - /* * IBM Accurate Mathematical Library * written by International Business Machines Corp. - * Copyright (C) 2001 Free Software Foundation + * Copyright (C) 2001, 2011 Free Software Foundation * * This program is free software; you can redistribute it and/or modify * it under the terms of the GNU Lesser General Public License as published by @@ -34,11 +33,19 @@ #include "endian.h" #include "mpa.h" -void __mpsqrt(mp_no *, mp_no *, int); -void __mpatan(mp_no *x, mp_no *y, int p) { +#ifndef SECTION +# define SECTION +#endif + #include "mpatan.h" +void __mpsqrt(mp_no *, mp_no *, int); + +void +SECTION +__mpatan(mp_no *x, mp_no *y, int p) { + int i,m,n; double dx; mp_no @@ -54,19 +61,19 @@ void __mpatan(mp_no *x, mp_no *y, int p) { mp_no mps,mpsm,mpt,mpt1,mpt2,mpt3; - /* Choose m and initiate mpone, mptwo & mptwoim1 */ + /* Choose m and initiate mpone, mptwo & mptwoim1 */ if (EX>0) m=7; else if (EX<0) m=0; else { __mp_dbl(x,&dx,p); dx=ABS(dx); for (m=6; m>0; m--) - {if (dx>xm[m].d) break;} + {if (dx>__atan_xm[m].d) break;} } mpone.e = mptwo.e = mptwoim1.e = 1; mpone.d[0] = mpone.d[1] = mptwo.d[0] = mptwoim1.d[0] = ONE; mptwo.d[1] = TWO; - /* Reduce x m times */ + /* Reduce x m times */ __mul(x,x,&mpsm,p); if (m==0) __cpy(x,&mps,p); else { @@ -82,8 +89,8 @@ void __mpatan(mp_no *x, mp_no *y, int p) { __mpsqrt(&mpsm,&mps,p); mps.d[0] = X[0]; } - /* Evaluate a truncated power series for Atan(s) */ - n=np[p]; mptwoim1.d[1] = twonm1[p].d; + /* Evaluate a truncated power series for Atan(s) */ + n=__atan_np[p]; mptwoim1.d[1] = __atan_twonm1[p].d; __dvd(&mpsm,&mptwoim1,&mpt,p); for (i=n-1; i>1; i--) { mptwoim1.d[1] -= TWO; @@ -94,8 +101,8 @@ void __mpatan(mp_no *x, mp_no *y, int p) { __mul(&mps,&mpt,&mpt1,p); __sub(&mps,&mpt1,&mpt,p); - /* Compute Atan(x) */ - mptwoim1.d[1] = twom[m].d; + /* Compute Atan(x) */ + mptwoim1.d[1] = __atan_twom[m].d; __mul(&mptwoim1,&mpt,y,p); return; |