Update.

2001-03-11  Ulrich Drepper  <drepper@redhat.com>

	Last-bit accurate math library implementation by IBM Haifa.
	Contributed by Abraham Ziv <ziv@il.ibm.com>, Moshe Olshansky
	<olshansk@il.ibm.com>, Ealan Henis <ealan@il.ibm.com>, and
	Anna Reitman <reitman@il.ibm.com>.
	* math/Makefile (dbl-only-routines): New variable.
	(libm-routines): Add $(dbl-only-routines).
	* sysdeps/ieee754/dbl-64/e_acos.c: Empty, definition is in e_asin.c.
	* sysdeps/ieee754/dbl-64/e_asin.c: Replaced with accurate asin
	implementation.
	* sysdeps/ieee754/dbl-64/e_atan2.c: Replaced with accurate atan2
	implementation.
	* sysdeps/ieee754/dbl-64/e_exp.c: Replaced with accurate exp
	implementation.
	* sysdeps/ieee754/dbl-64/e_lgamma_r.c: Don't use __kernel_sin and
	__kernel_cos.
	* sysdeps/ieee754/dbl-64/e_log.c: Replaced with accurate log
	implementation.
	* sysdeps/ieee754/dbl-64/e_remainder.c: Replaced with accurate
	remainder implementation.
	* sysdeps/ieee754/dbl-64/e_pow.c: Replaced with accurate pow
	implementation.
	* sysdeps/ieee754/dbl-64/e_sqrt.c: Replaced with accurate sqrt
	implementation.
	* sysdeps/ieee754/dbl-64/k_cos.c: Empty, definition is in s_sin.c.
	* sysdeps/ieee754/dbl-64/k_sin.c: Empty, definition is in s_sin.c.
	* sysdeps/ieee754/dbl-64/s_atan.c: Replaced with accurate atan
	implementation.
	* sysdeps/ieee754/dbl-64/s_cos.c: Empty, definition is in s_sin.c.
	* sysdeps/ieee754/dbl-64/s_sin.c: Replaced with accurate sin/cos
	implementation.
	* sysdeps/ieee754/dbl-64/s_sincos.c: Rewritten to not use __kernel_sin
	and __kernel_cos.
	* sysdeps/ieee754/dbl-64/s_tan.c: Replaced with accurate tan
	implementation.
	* sysdeps/ieee754/dbl-64/Dist: Add new non-code files.
	* sysdeps/ieee754/dbl-64/MathLib.h: New file.
	* sysdeps/ieee754/dbl-64/asincos.tbl: New file.
	* sysdeps/ieee754/dbl-64/atnat.h: New file.
	* sysdeps/ieee754/dbl-64/atnat2.h: New file.
	* sysdeps/ieee754/dbl-64/branred.c: New file.
	* sysdeps/ieee754/dbl-64/branred.h: New file.
	* sysdeps/ieee754/dbl-64/dla.h: New file.
	* sysdeps/ieee754/dbl-64/doasin.c: New file.
	* sysdeps/ieee754/dbl-64/doasin.h: New file.
	* sysdeps/ieee754/dbl-64/dosincos.c: New file.
	* sysdeps/ieee754/dbl-64/dosincos.h: New file.
	* sysdeps/ieee754/dbl-64/endian.h: New file.
	* sysdeps/ieee754/dbl-64/halfulp.c: New file.
	* sysdeps/ieee754/dbl-64/mpa.c: New file.
	* sysdeps/ieee754/dbl-64/mpa.h: New file.
	* sysdeps/ieee754/dbl-64/mpa2.h: New file.
	* sysdeps/ieee754/dbl-64/mpatan.c: New file.
	* sysdeps/ieee754/dbl-64/mpatan.h: New file.
	* sysdeps/ieee754/dbl-64/mpatan2.c: New file.
	* sysdeps/ieee754/dbl-64/mpexp.c: New file.
	* sysdeps/ieee754/dbl-64/mpexp.h: New file.
	* sysdeps/ieee754/dbl-64/mplog.c: New file.
	* sysdeps/ieee754/dbl-64/mplog.h: New file.
	* sysdeps/ieee754/dbl-64/mpsqrt.c: New file.
	* sysdeps/ieee754/dbl-64/mpsqrt.h: New file.
	* sysdeps/ieee754/dbl-64/mptan.c: New file.
	* sysdeps/ieee754/dbl-64/mydefs.h: New file.
	* sysdeps/ieee754/dbl-64/powtwo.tbl: New file.
	* sysdeps/ieee754/dbl-64/root.tbl: New file.
	* sysdeps/ieee754/dbl-64/sincos.tbl: New file.
	* sysdeps/ieee754/dbl-64/sincos32.c: New file.
	* sysdeps/ieee754/dbl-64/sincos32.h: New file.
	* sysdeps/ieee754/dbl-64/slowexp.c: New file.
	* sysdeps/ieee754/dbl-64/slowpow.c: New file.
	* sysdeps/ieee754/dbl-64/uasncs.h: New file.
	* sysdeps/ieee754/dbl-64/uatan.tbl: New file.
	* sysdeps/ieee754/dbl-64/uexp.h: New file.
	* sysdeps/ieee754/dbl-64/uexp.tbl: New file.
	* sysdeps/ieee754/dbl-64/ulog.h: New file.
	* sysdeps/ieee754/dbl-64/ulog.tbl: New file.
	* sysdeps/ieee754/dbl-64/upow.h: New file.
	* sysdeps/ieee754/dbl-64/upow.tbl: New file.
	* sysdeps/ieee754/dbl-64/urem.h: New file.
	* sysdeps/ieee754/dbl-64/uroot.h: New file.
	* sysdeps/ieee754/dbl-64/usncs.h: New file.
	* sysdeps/ieee754/dbl-64/utan.h: New file.
	* sysdeps/ieee754/dbl-64/utan.tbl: New file.
	* sysdeps/i386/fpu/branred.c: New file.
	* sysdeps/i386/fpu/doasin.c: New file.
	* sysdeps/i386/fpu/dosincos.c: New file.
	* sysdeps/i386/fpu/halfulp.c: New file.
	* sysdeps/i386/fpu/mpa.c: New file.
	* sysdeps/i386/fpu/mpatan.c: New file.
	* sysdeps/i386/fpu/mpatan2.c: New file.
	* sysdeps/i386/fpu/mpexp.c: New file.
	* sysdeps/i386/fpu/mplog.c: New file.
	* sysdeps/i386/fpu/mpsqrt.c: New file.
	* sysdeps/i386/fpu/mptan.c: New file.
	* sysdeps/i386/fpu/sincos32.c: New file.
	* sysdeps/i386/fpu/slowexp.c: New file.
	* sysdeps/i386/fpu/slowpow.c: New file.
	* sysdeps/ia64/fpu/branred.c: New file.
	* sysdeps/ia64/fpu/doasin.c: New file.
	* sysdeps/ia64/fpu/dosincos.c: New file.
	* sysdeps/ia64/fpu/halfulp.c: New file.
	* sysdeps/ia64/fpu/mpa.c: New file.
	* sysdeps/ia64/fpu/mpatan.c: New file.
	* sysdeps/ia64/fpu/mpatan2.c: New file.
	* sysdeps/ia64/fpu/mpexp.c: New file.
	* sysdeps/ia64/fpu/mplog.c: New file.
	* sysdeps/ia64/fpu/mpsqrt.c: New file.
	* sysdeps/ia64/fpu/mptan.c: New file.
	* sysdeps/ia64/fpu/sincos32.c: New file.
	* sysdeps/ia64/fpu/slowexp.c: New file.
	* sysdeps/ia64/fpu/slowpow.c: New file.
	* sysdeps/m68k/fpu/branred.c: New file.
	* sysdeps/m68k/fpu/doasin.c: New file.
	* sysdeps/m68k/fpu/dosincos.c: New file.
	* sysdeps/m68k/fpu/halfulp.c: New file.
	* sysdeps/m68k/fpu/mpa.c: New file.
	* sysdeps/m68k/fpu/mpatan.c: New file.
	* sysdeps/m68k/fpu/mpatan2.c: New file.
	* sysdeps/m68k/fpu/mpexp.c: New file.
	* sysdeps/m68k/fpu/mplog.c: New file.
	* sysdeps/m68k/fpu/mpsqrt.c: New file.
	* sysdeps/m68k/fpu/mptan.c: New file.
	* sysdeps/m68k/fpu/sincos32.c: New file.
	* sysdeps/m68k/fpu/slowexp.c: New file.
	* sysdeps/m68k/fpu/slowpow.c: New file.

	* iconvdata/gconv-modules: Add a number of alias, mostly for IBM
	codepages.

1 files changed, 139 insertions, 0 deletions

diff --git a/sysdeps/ieee754/dbl-64/branred.c b/sysdeps/ieee754/dbl-64/branred.c
new file mode 100644
index 0000000..09b5560
--- /dev/null
+++ b/sysdeps/ieee754/dbl-64/branred.c
@@ -0,0 +1,139 @@
+
+/*
+ * IBM Accurate Mathematical Library
+ * Copyright (c) International Business Machines Corp., 2001
+ *
+ * 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
+ * the Free Software Foundation; either version 2 of the License, or 
+ * (at your option) any later version.
+ * 
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ * GNU General Public License for more details.
+ *
+ * You should have received a copy of the GNU Lesser General Public License
+ * along with this program; if not, write to the Free Software
+ * Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA.  
+ */
+/*******************************************************************/
+/*                                                                 */
+/* MODULE_NAME: branred.c                                          */ 
+/*                                                                 */
+/* FUNCTIONS:   branred                                            */
+/*                                                                 */ 
+/* FILES NEEDED: branred.h mydefs.h endian.h mpa.h                 */
+/*               mha.c                                             */
+/*                                                                 */
+/* Routine  branred() performs range  reduction of a double number */
+/* x into Double length number  a+aa,such that                     */
+/* x=n*pi/2+(a+aa), abs(a+aa)<pi/4, n=0,+-1,+-2,....               */
+/* Routine returns the integer (n mod 4) of the above description  */
+/* of x.                                                           */
+/*******************************************************************/
+
+#include "endian.h"
+#include "mydefs.h"
+#include "branred.h"
+
+
+
+/*******************************************************************/
+/* Routine  branred() performs range  reduction of a double number */
+/* x into Double length number a+aa,such that                      */
+/* x=n*pi/2+(a+aa), abs(a+aa)<pi/4, n=0,+-1,+-2,....               */
+/* Routine return integer (n mod 4)                                */
+/*******************************************************************/
+int branred(double x, double *a, double *aa) 
+{
+  int i,k,n;
+  mynumber  u,v,gor;
+  double r[6],s,t,sum,b,bb,sum1,sum2,b1,bb1,b2,bb2,x1,x2,t1,t2; 
+  
+  x*=tm600.x;
+  t=x*split;   /* split x to two numbers */
+  x1=t-(t-x);
+  x2=x-x1;
+  sum=0;
+  u.x = x1;
+  k = (u.i[HIGH_HALF]>>20)&2047; 
+  k = (k-450)/24;
+  if (k<0)
+    k=0;
+  gor.x = t576.x;
+  gor.i[HIGH_HALF] -= ((k*24)<<20);
+  for (i=0;i<6;i++) 
+    { r[i] = x1*toverp[k+i]*gor.x; gor.x *= tm24.x; }
+  for (i=0;i<3;i++) {
+    s=(r[i]+big.x)-big.x; 
+    sum+=s;
+    r[i]-=s;
+  }
+  t=0;
+  for (i=0;i<6;i++) 
+    t+=r[5-i];
+  bb=(((((r[0]-t)+r[1])+r[2])+r[3])+r[4])+r[5]; 
+  s=(t+big.x)-big.x;
+  sum+=s;
+  t-=s;
+  b=t+bb;
+  bb=(t-b)+bb;
+  s=(sum+big1.x)-big1.x;
+  sum-=s;
+  b1=b;
+  bb1=bb;
+  sum1=sum;
+  sum=0;
+  
+  u.x = x2;
+  k = (u.i[HIGH_HALF]>>20)&2047;
+  k = (k-450)/24;
+  if (k<0)
+    k=0;
+  gor.x = t576.x;
+  gor.i[HIGH_HALF] -= ((k*24)<<20);
+  for (i=0;i<6;i++)
+    { r[i] = x2*toverp[k+i]*gor.x; gor.x *= tm24.x; }
+  for (i=0;i<3;i++) {
+    s=(r[i]+big.x)-big.x; 
+    sum+=s;
+    r[i]-=s;
+  }
+  t=0;
+  for (i=0;i<6;i++)
+    t+=r[5-i];
+  bb=(((((r[0]-t)+r[1])+r[2])+r[3])+r[4])+r[5]; 
+  s=(t+big.x)-big.x;
+ sum+=s;
+ t-=s;
+ b=t+bb;
+ bb=(t-b)+bb;
+ s=(sum+big1.x)-big1.x;
+ sum-=s;
+ 
+ b2=b;
+ bb2=bb;
+ sum2=sum;
+ 
+ sum=sum1+sum2;
+ b=b1+b2;
+ bb = (ABS(b1)>ABS(b2))? (b1-b)+b2 : (b2-b)+b1;  
+ if (b > 0.5) 
+   {b-=1.0; sum+=1.0;}
+ else if (b < -0.5) 
+   {b+=1.0; sum-=1.0;}
+ s=b+(bb+bb1+bb2);
+ t=((b-s)+bb)+(bb1+bb2);
+ b=s*split;
+ t1=b-(b-s);
+ t2=s-t1;
+ b=s*hp0.x;
+ bb=(((t1*mp1.x-b)+t1*mp2.x)+t2*mp1.x)+(t2*mp2.x+s*hp1.x+t*hp0.x);
+ s=b+bb;
+ t=(b-s)+bb;
+ *a=s;
+ *aa=t;
+ return ((int) sum)&3; /* return quater of unit circle */
+}
+