Remove unused math files

Remove empty files due to the sin/cos improvements: k_sinf.c, k_cosf.c,
k_cos.c, k_sin.c.  After the tanf change s_rem_pio2f.c and k_rem_pio2f.c
(and the ia64, m68k and powerpc equivalents) are no longer used,
so remove them.  All e_rem_pio2.c files were already empty or commented
out, so remove them too.  Passes build-many-glibcs.

	* math/Makefile: Remove empty files k_sin(f).c, k_cos(f).c.
	Remove unused files e_rem_pio2(f).c, k_rem_pio2f.c.
	* sysdeps/i386/fpu/e_rem_pio2.c: Delete file.
	* sysdeps/ia64/fpu/e_rem_pio2.c: Likewise.
	* sysdeps/ia64/fpu/e_rem_pio2f.c: Likewise.
	* sysdeps/ia64/fpu/k_rem_pio2f.c: Likewise.
	* sysdeps/ieee754/dbl-64/e_rem_pio2.c: Likewise.
	* sysdeps/ieee754/dbl-64/k_cos.c: Likewise.
	* sysdeps/ieee754/dbl-64/k_sin.c: Likewise.
	* sysdeps/ieee754/flt-32/e_rem_pio2f.c: Likewise.
	* sysdeps/ieee754/flt-32/k_cosf.c: Likewise.
	* sysdeps/ieee754/flt-32/k_rem_pio2f.c: Likewise.
	* sysdeps/ieee754/flt-32/k_sinf.c: Likewise.
	* sysdeps/m68k/m680x0/fpu/e_rem_pio2.c: Likewise
	* sysdeps/m68k/m680x0/fpu/e_rem_pio2f.c: Likewise
	* sysdeps/m68k/m680x0/fpu/k_rem_pio2f.c: Likewise
	* sysdeps/powerpc/fpu/e_rem_pio2f.c: Likewise.
	* sysdeps/powerpc/fpu/k_rem_pio2f.c: Likewise.

3 files changed, 0 insertions, 195 deletions

diff --git a/sysdeps/ieee754/dbl-64/e_rem_pio2.c b/sysdeps/ieee754/dbl-64/e_rem_pio2.c
deleted file mode 100644
index 81a3d073d4..0000000000
--- a/sysdeps/ieee754/dbl-64/e_rem_pio2.c
+++ /dev/null
@@ -1,193 +0,0 @@
-#ifdef NOT_NEEDED_ANYMORE
-
-/*
- * ====================================================
- * Copyright (C) 1993 by Sun Microsystems, Inc. All rights reserved.
- *
- * Developed at SunPro, a Sun Microsystems, Inc. business.
- * Permission to use, copy, modify, and distribute this
- * software is freely granted, provided that this notice
- * is preserved.
- * ====================================================
- */
-
-/* __ieee754_rem_pio2(x,y)
- *
- * return the remainder of x rem pi/2 in y[0]+y[1]
- * use __kernel_rem_pio2()
- */
-
-#include <math.h>
-#include <math_private.h>
-
-/*
- * Table of constants for 2/pi, 396 Hex digits (476 decimal) of 2/pi
- */
-static const int32_t two_over_pi[] = {
-0xA2F983, 0x6E4E44, 0x1529FC, 0x2757D1, 0xF534DD, 0xC0DB62,
-0x95993C, 0x439041, 0xFE5163, 0xABDEBB, 0xC561B7, 0x246E3A,
-0x424DD2, 0xE00649, 0x2EEA09, 0xD1921C, 0xFE1DEB, 0x1CB129,
-0xA73EE8, 0x8235F5, 0x2EBB44, 0x84E99C, 0x7026B4, 0x5F7E41,
-0x3991D6, 0x398353, 0x39F49C, 0x845F8B, 0xBDF928, 0x3B1FF8,
-0x97FFDE, 0x05980F, 0xEF2F11, 0x8B5A0A, 0x6D1F6D, 0x367ECF,
-0x27CB09, 0xB74F46, 0x3F669E, 0x5FEA2D, 0x7527BA, 0xC7EBE5,
-0xF17B3D, 0x0739F7, 0x8A5292, 0xEA6BFB, 0x5FB11F, 0x8D5D08,
-0x560330, 0x46FC7B, 0x6BABF0, 0xCFBC20, 0x9AF436, 0x1DA9E3,
-0x91615E, 0xE61B08, 0x659985, 0x5F14A0, 0x68408D, 0xFFD880,
-0x4D7327, 0x310606, 0x1556CA, 0x73A8C9, 0x60E27B, 0xC08C6B,
-};
-
-static const int32_t npio2_hw[] = {
-0x3FF921FB, 0x400921FB, 0x4012D97C, 0x401921FB, 0x401F6A7A, 0x4022D97C,
-0x4025FDBB, 0x402921FB, 0x402C463A, 0x402F6A7A, 0x4031475C, 0x4032D97C,
-0x40346B9C, 0x4035FDBB, 0x40378FDB, 0x403921FB, 0x403AB41B, 0x403C463A,
-0x403DD85A, 0x403F6A7A, 0x40407E4C, 0x4041475C, 0x4042106C, 0x4042D97C,
-0x4043A28C, 0x40446B9C, 0x404534AC, 0x4045FDBB, 0x4046C6CB, 0x40478FDB,
-0x404858EB, 0x404921FB,
-};
-
-/*
- * invpio2:  53 bits of 2/pi
- * pio2_1:   first  33 bit of pi/2
- * pio2_1t:  pi/2 - pio2_1
- * pio2_2:   second 33 bit of pi/2
- * pio2_2t:  pi/2 - (pio2_1+pio2_2)
- * pio2_3:   third  33 bit of pi/2
- * pio2_3t:  pi/2 - (pio2_1+pio2_2+pio2_3)
- */
-
-static const double
-  zero    = 0.00000000000000000000e+00, /* 0x00000000, 0x00000000 */
-  half    = 5.00000000000000000000e-01, /* 0x3FE00000, 0x00000000 */
-  two24   = 1.67772160000000000000e+07, /* 0x41700000, 0x00000000 */
-  invpio2 = 6.36619772367581382433e-01, /* 0x3FE45F30, 0x6DC9C883 */
-  pio2_1  = 1.57079632673412561417e+00, /* 0x3FF921FB, 0x54400000 */
-  pio2_1t = 6.07710050650619224932e-11, /* 0x3DD0B461, 0x1A626331 */
-  pio2_2  = 6.07710050630396597660e-11, /* 0x3DD0B461, 0x1A600000 */
-  pio2_2t = 2.02226624879595063154e-21, /* 0x3BA3198A, 0x2E037073 */
-  pio2_3  = 2.02226624871116645580e-21, /* 0x3BA3198A, 0x2E000000 */
-  pio2_3t = 8.47842766036889956997e-32; /* 0x397B839A, 0x252049C1 */
-
-int32_t
-__ieee754_rem_pio2 (double x, double *y)
-{
-  double z, w, t, r, fn;
-  double tx[3];
-  int32_t e0, i, j, nx, n, ix, hx;
-  uint32_t low;
-
-  GET_HIGH_WORD (hx, x);                /* high word of x */
-  ix = hx & 0x7fffffff;
-  if (ix <= 0x3fe921fb)      /* |x| ~<= pi/4 , no need for reduction */
-    {
-      y[0] = x; y[1] = 0; return 0;
-    }
-  if (ix < 0x4002d97c)       /* |x| < 3pi/4, special case with n=+-1 */
-    {
-      if (hx > 0)
-	{
-	  z = x - pio2_1;
-	  if (ix != 0x3ff921fb)         /* 33+53 bit pi is good enough */
-	    {
-	      y[0] = z - pio2_1t;
-	      y[1] = (z - y[0]) - pio2_1t;
-	    }
-	  else                          /* near pi/2, use 33+33+53 bit pi */
-	    {
-	      z -= pio2_2;
-	      y[0] = z - pio2_2t;
-	      y[1] = (z - y[0]) - pio2_2t;
-	    }
-	  return 1;
-	}
-      else              /* negative x */
-	{
-	  z = x + pio2_1;
-	  if (ix != 0x3ff921fb)         /* 33+53 bit pi is good enough */
-	    {
-	      y[0] = z + pio2_1t;
-	      y[1] = (z - y[0]) + pio2_1t;
-	    }
-	  else                          /* near pi/2, use 33+33+53 bit pi */
-	    {
-	      z += pio2_2;
-	      y[0] = z + pio2_2t;
-	      y[1] = (z - y[0]) + pio2_2t;
-	    }
-	  return -1;
-	}
-    }
-  if (ix <= 0x413921fb)      /* |x| ~<= 2^19*(pi/2), medium size */
-    {
-      t = fabs (x);
-      n = (int32_t) (t * invpio2 + half);
-      fn = (double) n;
-      r = t - fn * pio2_1;
-      w = fn * pio2_1t;         /* 1st round good to 85 bit */
-      if (n < 32 && ix != npio2_hw[n - 1])
-	{
-	  y[0] = r - w;         /* quick check no cancellation */
-	}
-      else
-	{
-	  uint32_t high;
-	  j = ix >> 20;
-	  y[0] = r - w;
-	  GET_HIGH_WORD (high, y[0]);
-	  i = j - ((high >> 20) & 0x7ff);
-	  if (i > 16)       /* 2nd iteration needed, good to 118 */
-	    {
-	      t = r;
-	      w = fn * pio2_2;
-	      r = t - w;
-	      w = fn * pio2_2t - ((t - r) - w);
-	      y[0] = r - w;
-	      GET_HIGH_WORD (high, y[0]);
-	      i = j - ((high >> 20) & 0x7ff);
-	      if (i > 49)       /* 3rd iteration need, 151 bits acc */
-		{
-		  t = r;        /* will cover all possible cases */
-		  w = fn * pio2_3;
-		  r = t - w;
-		  w = fn * pio2_3t - ((t - r) - w);
-		  y[0] = r - w;
-		}
-	    }
-	}
-      y[1] = (r - y[0]) - w;
-      if (hx < 0)
-	{
-	  y[0] = -y[0]; y[1] = -y[1]; return -n;
-	}
-      else
-	return n;
-    }
-  /*
-   * all other (large) arguments
-   */
-  if (ix >= 0x7ff00000)                 /* x is inf or NaN */
-    {
-      y[0] = y[1] = x - x; return 0;
-    }
-  /* set z = scalbn(|x|,ilogb(x)-23) */
-  GET_LOW_WORD (low, x);
-  SET_LOW_WORD (z, low);
-  e0 = (ix >> 20) - 1046;               /* e0 = ilogb(z)-23; */
-  SET_HIGH_WORD (z, ix - ((int32_t) (e0 << 20)));
-  for (i = 0; i < 2; i++)
-    {
-      tx[i] = (double) ((int32_t) (z));
-      z = (z - tx[i]) * two24;
-    }
-  tx[2] = z;
-  nx = 3;
-  while (tx[nx - 1] == zero)
-    nx--;                               /* skip zero term */
-  n = __kernel_rem_pio2 (tx, y, e0, nx, 2, two_over_pi);
-  if (hx < 0)
-    {
-      y[0] = -y[0]; y[1] = -y[1]; return -n;
-    }
-  return n;
-}
-#endif
diff --git a/sysdeps/ieee754/dbl-64/k_cos.c b/sysdeps/ieee754/dbl-64/k_cos.c
deleted file mode 100644
index cc5c205a5f..0000000000
--- a/sysdeps/ieee754/dbl-64/k_cos.c
+++ /dev/null
@@ -1 +0,0 @@
-/* Not needed anymore.  */
diff --git a/sysdeps/ieee754/dbl-64/k_sin.c b/sysdeps/ieee754/dbl-64/k_sin.c
deleted file mode 100644
index cc5c205a5f..0000000000
--- a/sysdeps/ieee754/dbl-64/k_sin.c
+++ /dev/null
@@ -1 +0,0 @@
-/* Not needed anymore.  */