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| author | Ulrich Drepper <drepper@gmail.com> | 2011-10-22 19:02:20 -0400 |
|---|---|---|
| committer | Ulrich Drepper <drepper@gmail.com> | 2011-10-22 19:02:20 -0400 |
| commit | a1a8716924f31400e81319c9124e1182fd9e8e83 (patch) | |
| tree | 200b17d935331c4e17e043d84fdfe79feabff6f8 /sysdeps/ieee754/dbl-64/dosincos.c | |
| parent | dbc36f153e7f35d8c890871528438bb8ade99886 (diff) | |
| download | glibc-a1a8716924f31400e81319c9124e1182fd9e8e83.tar.gz glibc-a1a8716924f31400e81319c9124e1182fd9e8e83.tar.xz glibc-a1a8716924f31400e81319c9124e1182fd9e8e83.zip | |
Start using fma in the libm implementation
Diffstat (limited to 'sysdeps/ieee754/dbl-64/dosincos.c')
| -rw-r--r-- | sysdeps/ieee754/dbl-64/dosincos.c | 20 |
1 files changed, 13 insertions, 7 deletions
diff --git a/sysdeps/ieee754/dbl-64/dosincos.c b/sysdeps/ieee754/dbl-64/dosincos.c index 1d347a4bc7..654f3424e8 100644 --- a/sysdeps/ieee754/dbl-64/dosincos.c +++ b/sysdeps/ieee754/dbl-64/dosincos.c @@ -1,7 +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 @@ -48,8 +48,11 @@ /***********************************************************************/ void __dubsin(double x, double dx, double v[]) { - double r,s,p,hx,tx,hy,ty,q,c,cc,d,dd,d2,dd2,e,ee, + double r,s,c,cc,d,dd,d2,dd2,e,ee, sn,ssn,cs,ccs,ds,dss,dc,dcc; +#ifndef DLA_FMA + double p,hx,tx,hy,ty,q; +#endif #if 0 double xx,y,yy,z,zz; #endif @@ -61,7 +64,7 @@ void __dubsin(double x, double dx, double v[]) { x=x-(u.x-big.x); d=x+dx; dd=(x-d)+dx; - /* sin(x+dx)=sin(Xi+t)=sin(Xi)*cos(t) + cos(Xi)sin(t) where t ->0 */ + /* sin(x+dx)=sin(Xi+t)=sin(Xi)*cos(t) + cos(Xi)sin(t) where t ->0 */ MUL2(d,dd,d,dd,d2,dd2,p,hx,tx,hy,ty,q,c,cc); sn=sincos.x[k]; /* */ ssn=sincos.x[k+1]; /* sin(Xi) and cos(Xi) */ @@ -99,8 +102,11 @@ void __dubsin(double x, double dx, double v[]) { /**********************************************************************/ void __dubcos(double x, double dx, double v[]) { - double r,s,p,hx,tx,hy,ty,q,c,cc,d,dd,d2,dd2,e,ee, + double r,s,c,cc,d,dd,d2,dd2,e,ee, sn,ssn,cs,ccs,ds,dss,dc,dcc; +#ifndef DLA_FMA + double p,hx,tx,hy,ty,q; +#endif #if 0 double xx,y,yy,z,zz; #endif @@ -166,15 +172,15 @@ void __docos(double x, double dx, double v[]) { if (x>0) {y=x; yy=dx;} else {y=-x; yy=-dx;} if (y<0.5*hp0.x) /* y< PI/4 */ - {__dubcos(y,yy,w); v[0]=w[0]; v[1]=w[1];} + {__dubcos(y,yy,w); v[0]=w[0]; v[1]=w[1];} else if (y<1.5*hp0.x) { /* y< 3/4 * PI */ p=hp0.x-y; /* p = PI/2 - y */ yy=hp1.x-yy; y=p+yy; yy=(p-y)+yy; if (y>0) {__dubsin(y,yy,w); v[0]=w[0]; v[1]=w[1];} - /* cos(x) = sin ( 90 - x ) */ - else {__dubsin(-y,-yy,w); v[0]=-w[0]; v[1]=-w[1]; + /* cos(x) = sin ( 90 - x ) */ + else {__dubsin(-y,-yy,w); v[0]=-w[0]; v[1]=-w[1]; } } else { /* y>= 3/4 * PI */ |