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.

1 files changed, 0 insertions, 188 deletions

diff --git a/sysdeps/powerpc/fpu/e_rem_pio2f.c b/sysdeps/powerpc/fpu/e_rem_pio2f.c
deleted file mode 100644
index 30fd53ee2c..0000000000
--- a/sysdeps/powerpc/fpu/e_rem_pio2f.c
+++ /dev/null
@@ -1,188 +0,0 @@
-/* e_rem_pio2f.c -- float version of e_rem_pio2.c
-   Copyright (C) 2011-2018 Free Software Foundation, Inc.
-   This file is part of the GNU C Library.
-   Contributed by Adhemerval Zanella <azanella@br.ibm.com>, 2011
-
-   The GNU C Library is free software; you can redistribute it and/or
-   modify it under the terms of the GNU Library General Public License as
-   published by the Free Software Foundation; either version 2 of the
-   License, or (at your option) any later version.
-
-   The GNU C Library 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
-   Library General Public License for more details.
-
-   You should have received a copy of the GNU Library General Public
-   License along with the GNU C Library; see the file COPYING.LIB.  If
-   not, see <http://www.gnu.org/licenses/>.  */
-
-#include <math.h>
-
-#include <math_private.h>
-#include "s_float_bitwise.h"
-
-/* defined in sysdeps/powerpc/fpu/k_rem_pio2f.c */
-int __fp_kernel_rem_pio2f (float *x, float *y, float e0, int32_t nx);
-
-/* __ieee754_rem_pio2f(x,y)
- *
- * return the remainder of x rem pi/2 in y[0]+y[1]
- */
-
-static const float npio2_hw[] = {
-  1.57077026e+00, 3.14154053e+00, 4.71228027e+00, 6.28308105e+00,
-  7.85388184e+00, 9.42456055e+00, 1.09953613e+01, 1.25661621e+01,
-  1.41369629e+01, 1.57077637e+01, 1.72783203e+01, 1.88491211e+01,
-  2.04199219e+01, 2.19907227e+01, 2.35615234e+01, 2.51323242e+01,
-  2.67031250e+01, 2.82739258e+01, 2.98447266e+01, 3.14155273e+01,
-  3.29863281e+01, 3.45566406e+01, 3.61279297e+01, 3.76982422e+01,
-  3.92695312e+01, 4.08398438e+01, 4.24111328e+01, 4.39814453e+01,
-  4.55527344e+01, 4.71230469e+01, 4.86943359e+01, 5.02646484e+01
-};
-
-
-static const float zero  = 0.0000000000e+00;
-static const float two8  = 2.5600000000e+02;
-
-static const float half    = 5.0000000000e-01;
-static const float invpio2 = 6.3661980629e-01;
-static const float pio2_1  = 1.5707855225e+00;
-static const float pio2_1t = 1.0804334124e-05;
-static const float pio2_2  = 1.0804273188e-05;
-static const float pio2_2t = 6.0770999344e-11;
-static const float pio2_3  = 6.0770943833e-11;
-static const float pio2_3t = 6.1232342629e-17;
-
-static const float pio4     = 7.8539801e-01;
-static const float pio3_4   = 2.3561945e+00;
-static const float pio2_24b = 1.5707951e+00;
-static const float pio2_2e7 = 2.0106054e+02;
-
-
-int32_t
-__ieee754_rem_pio2f (float x, float *y)
-{
-  float ax, z, n, r, w, t, e0;
-  float tx[3];
-  int32_t i, nx;
-
-  ax = __builtin_fabsf (x);
-  if (ax <= pio4)
-    {
-      y[0] = x;
-      y[1] = 0;
-      return 0;
-    }
-  if (ax < pio3_4)
-    {
-      if (x > 0)
-	{
-	  z = x - pio2_1;
-	  if (!__float_and_test28 (ax, pio2_24b))
-	    {
-	      y[0] = z - pio2_1t;
-	      y[1] = (z - y[0]) - pio2_1t;
-	    }
-	  else
-	    {
-	      z -= pio2_2;
-	      y[0] = z - pio2_2t;
-	      y[1] = (z - y[0]) - pio2_2t;
-	    }
-	  return 1;
-	}
-      else
-	{
-	  z = x + pio2_1;
-	  if (!__float_and_test28 (ax, pio2_24b))
-	    {
-	      y[0] = z + pio2_1t;
-	      y[1] = (z - y[0]) + pio2_1t;
-	    }
-	  else
-	    {
-	      z += pio2_2;
-	      y[0] = z + pio2_2t;
-	      y[1] = (z - y[0]) + pio2_2t;
-	    }
-	  return -1;
-	}
-    }
-  if (ax <= pio2_2e7)
-    {
-      n = __floorf (ax * invpio2 + half);
-      i = (int32_t) n;
-      r = ax - n * pio2_1;
-      w = n * pio2_1t;		/* 1st round good to 40 bit */
-      if (i < 32 && !__float_and_test24 (ax, npio2_hw[i - 1]))
-	{
-	  y[0] = r - w;
-	}
-      else
-	{
-	  float i, j;
-	  j = __float_and8 (ax);
-	  y[0] = r - w;
-	  i = __float_and8 (y[0]);
-	  if (j / i > 256.0 || j / i < 3.9062500e-3)
-	    {			/* 2nd iterations needed, good to 57 */
-	      t = r;
-	      w = n * pio2_2;
-	      r = t - w;
-	      w = n * pio2_2t - ((t - r) - w);
-	      y[0] = r - w;
-	      i = __float_and8 (y[0]);
-	      if (j / i > 33554432 || j / i < 2.9802322e-8)
-		{		/* 3rd iteration needed, 74 bits acc */
-		  t = r;
-		  w = n * pio2_3;
-		  r = t - w;
-		  w = n * pio2_3t - ((t - r) - w);
-		  y[0] = r - w;
-		}
-	    }
-	}
-      y[1] = (r - y[0]) - w;
-      if (x < 0)
-	{
-	  y[0] = -y[0];
-	  y[1] = -y[1];
-	  return -i;
-	}
-      else
-	{
-	  return i;
-	}
-    }
-
-  /* all other (large) arguments */
-  if (isnanf (x) || isinff (x))
-    {
-      y[0] = y[1] = x - x;
-      return 0;
-    }
-
-  /* set z = scalbn(|x|,ilogb(x)-7) */
-  e0 = __float_and8 (ax / 128.0);
-  z = ax / e0;
-
-  tx[0] = __floorf (z);
-  z = (z - tx[0]) * two8;
-  tx[1] = __floorf (z);
-  z = (z - tx[1]) * two8;
-  tx[2] = __floorf (z);
-
-  nx = 3;
-  while (tx[nx - 1] == zero)
-    nx--;
-
-  i = __fp_kernel_rem_pio2f (tx, y, e0, nx);
-  if (x < 0)
-    {
-      y[0] = -y[0];
-      y[1] = -y[1];
-      return -i;
-    }
-  return i;
-}