diff --git a/sysdeps/ieee754/dbl-64/s_sin.c b/sysdeps/ieee754/dbl-64/s_sin.c
index a8c5d4a..bc23e84 100644
--- a/sysdeps/ieee754/dbl-64/s_sin.c
+++ b/sysdeps/ieee754/dbl-64/s_sin.c
@@ -135,9 +135,11 @@ double __mpcos (double x, double dx, bool reduce_range);
 static double slow (double x);
 static double slow1 (double x);
 static double slow2 (double x);
+#ifndef IN_SINCOS
 static double sloww (double x, double dx, double orig);
 static double sloww1 (double x, double dx, double orig, int m);
 static double sloww2 (double x, double dx, double orig, int n);
+#endif
 static double bsloww (double x, double dx, double orig, int n);
 static double bsloww1 (double x, double dx, double orig, int n);
 static double bsloww2 (double x, double dx, double orig, int n);
@@ -145,7 +147,9 @@ int __branred (double x, double *a, double *aa);
 static double cslow2 (double x);
 static double csloww (double x, double dx, double orig);
 static double csloww1 (double x, double dx, double orig, int m);
+#ifndef IN_SINCOS
 static double csloww2 (double x, double dx, double orig, int n);
+#endif
 
 /* Given a number partitioned into U and X such that U is an index into the
    sin/cos table, this macro computes the cosine of the number by combining
@@ -818,6 +822,7 @@ slow2 (double x)
   return (x > 0) ? __mpsin (x, 0, false) : -__mpsin (-x, 0, false);
 }
 
+#ifndef IN_SINCOS
 /***************************************************************************/
 /*  Routine compute sin(x+dx) (Double-Length number) where x is small enough*/
 /* to use Taylor series around zero and   (x+dx)                            */
@@ -946,6 +951,7 @@ sloww2 (double x, double dx, double orig, int n)
 
   return __mpsin (orig, 0, true);
 }
+#endif
 
 /***************************************************************************/
 /*  Routine compute sin(x+dx) or cos(x+dx) (Double-Length number) where x   */
@@ -1175,6 +1181,7 @@ csloww1 (double x, double dx, double orig, int m)
 }
 
 
+#ifndef IN_SINCOS
 /***************************************************************************/
 /*  Routine compute sin(x+dx)   (Double-Length number) where x in second or */
 /*  fourth quarter of unit circle.Routine receive also  the  original value */
@@ -1207,7 +1214,6 @@ csloww2 (double x, double dx, double orig, int n)
   return __mpcos (orig, 0, true);
 }
 
-#ifndef IN_SINCOS
 # ifndef __cos
 weak_alias (__cos, cos)
 #  ifdef NO_LONG_DOUBLE
diff --git a/sysdeps/ieee754/dbl-64/s_sincos.c b/sysdeps/ieee754/dbl-64/s_sincos.c
index 24dc43c..4d72d2b 100644
--- a/sysdeps/ieee754/dbl-64/s_sincos.c
+++ b/sysdeps/ieee754/dbl-64/s_sincos.c
@@ -33,9 +33,8 @@ static double
 __always_inline
 __sin_local (double x, int4 k)
 {
-  double xx, res, t, cor, y, s, c, sn, ssn, cs, ccs, xn, a, da, eps;
-  mynumber u, v;
-  int4 m, n;
+  double xx, res, t, cor, y, s, c, sn, ssn, cs, ccs;
+  mynumber u;
   double retval = 0;
 
   if (k < 0x3e500000)		/* if x->0 =>sin(x)=x */
@@ -74,7 +73,7 @@ __sin_local (double x, int4 k)
     }				/*   else  if (k < 0x3feb6000)    */
 
 /*----------------------- 0.855469  <|x|<2.426265  ----------------------*/
-  else if (k < 0x400368fd)
+  else
     {
 
       y = (x > 0) ? hp0 - x : hp0 + x;
@@ -92,72 +91,6 @@ __sin_local (double x, int4 k)
       retval = (res == res + 1.020 * cor) ? ((x > 0) ? res : -res) : slow2 (x);
     }				/*   else  if (k < 0x400368fd)    */
 
-/*-------------------------- 2.426265<|x|< 105414350 ----------------------*/
-  else
-    {
-      t = (x * hpinv + toint);
-      xn = t - toint;
-      v.x = t;
-      y = (x - xn * mp1) - xn * mp2;
-      n = v.i[LOW_HALF] & 3;
-      da = xn * mp3;
-      a = y - da;
-      da = (y - a) - da;
-      eps = fabs (x) * 1.2e-30;
-
-      switch (n)
-	{			/* quarter of unit circle */
-	case 0:
-	case 2:
-	  xx = a * a;
-	  if (n)
-	    {
-	      a = -a;
-	      da = -da;
-	    }
-	  if (xx < 0.01588)
-	    {
-	      /* Taylor series.  */
-	      res = TAYLOR_SIN (xx, a, da, cor);
-	      cor = (cor > 0) ? 1.02 * cor + eps : 1.02 * cor - eps;
-	      retval = (res == res + cor) ? res : sloww (a, da, x);
-	    }
-	  else
-	    {
-	      if (a > 0)
-		m = 1;
-	      else
-		{
-		  m = 0;
-		  a = -a;
-		  da = -da;
-		}
-	      u.x = big + a;
-	      y = a - (u.x - big);
-	      res = do_sin (u, y, da, &cor);
-	      cor = (cor > 0) ? 1.035 * cor + eps : 1.035 * cor - eps;
-	      retval = ((res == res + cor) ? ((m) ? res : -res)
-			: sloww1 (a, da, x, m));
-	    }
-	  break;
-
-	case 1:
-	case 3:
-	  if (a < 0)
-	    {
-	      a = -a;
-	      da = -da;
-	    }
-	  u.x = big + a;
-	  y = a - (u.x - big) + da;
-	  res = do_cos (u, y, &cor);
-	  cor = (cor > 0) ? 1.025 * cor + eps : 1.025 * cor - eps;
-	  retval = ((res == res + cor) ? ((n & 2) ? -res : res)
-		    : sloww2 (a, da, x, n));
-	  break;
-	}
-    }				/*   else  if (k <  0x419921FB )    */
-
   return retval;
 }
 
@@ -168,9 +101,9 @@ static double
 __always_inline
 __cos_local (double x, int4 k)
 {
-  double y, xx, res, t, cor, xn, a, da, eps;
-  mynumber u, v;
-  int4 m, n;
+  double y, xx, res, cor, a, da;
+  mynumber u;
+  int m;
 
   double retval = 0;
 
@@ -187,7 +120,7 @@ __cos_local (double x, int4 k)
       retval = (res == res + 1.020 * cor) ? res : cslow2 (x);
     }				/*   else  if (k < 0x3feb6000)    */
 
-  else if (k < 0x400368fd)
+  else
     { /* 0.855469  <|x|<2.426265  */ ;
       y = hp0 - fabs (x);
       a = y + hp1;
@@ -221,73 +154,6 @@ __cos_local (double x, int4 k)
 
     }				/*   else  if (k < 0x400368fd)    */
 
-
-  else if (k < 0x419921FB)
-    {				/* 2.426265<|x|< 105414350 */
-      t = (x * hpinv + toint);
-      xn = t - toint;
-      v.x = t;
-      y = (x - xn * mp1) - xn * mp2;
-      n = v.i[LOW_HALF] & 3;
-      da = xn * mp3;
-      a = y - da;
-      da = (y - a) - da;
-      eps = fabs (x) * 1.2e-30;
-
-      switch (n)
-	{
-	case 1:
-	case 3:
-	  xx = a * a;
-	  if (n == 1)
-	    {
-	      a = -a;
-	      da = -da;
-	    }
-	  if (xx < 0.01588)
-	    {
-	      res = TAYLOR_SIN (xx, a, da, cor);
-	      cor = (cor > 0) ? 1.02 * cor + eps : 1.02 * cor - eps;
-	      retval = (res == res + cor) ? res : csloww (a, da, x);
-	    }
-	  else
-	    {
-	      if (a > 0)
-		{
-		  m = 1;
-		}
-	      else
-		{
-		  m = 0;
-		  a = -a;
-		  da = -da;
-		}
-	      u.x = big + a;
-	      y = a - (u.x - big);
-	      res = do_sin (u, y, da, &cor);
-	      cor = (cor > 0) ? 1.035 * cor + eps : 1.035 * cor - eps;
-	      retval = ((res == res + cor) ? ((m) ? res : -res)
-			: csloww1 (a, da, x, m));
-	    }
-	  break;
-
-	case 0:
-	case 2:
-	  if (a < 0)
-	    {
-	      a = -a;
-	      da = -da;
-	    }
-	  u.x = big + a;
-	  y = a - (u.x - big) + da;
-	  res = do_cos (u, y, &cor);
-	  cor = (cor > 0) ? 1.025 * cor + eps : 1.025 * cor - eps;
-	  retval = ((res == res + cor) ? ((n) ? -res : res)
-		    : csloww2 (a, da, x, n));
-	  break;
-	}
-    }				/*   else  if (k <  0x419921FB )    */
-
   return retval;
 }
 
@@ -409,6 +275,182 @@ reduce_and_compute_sincos (double x, double *sinxp, double *cosxp)
   *cosxp = cosx;
 }
 
+/* Like sloww and csloww, except that it accepts the quadrant and decides to
+   call mpsin or mpcos based on that.  */
+static double
+sincos_sloww (double x, double dx, double orig, int4 n)
+{
+  double y, t, res, cor, w[2], a, da, xn;
+  res = TAYLOR_SLOW (x, dx, cor);
+
+  if (cor > 0)
+    cor = 1.0005 * cor + fabs (orig) * 3.1e-30;
+  else
+    cor = 1.0005 * cor - fabs (orig) * 3.1e-30;
+
+  if (res == res + cor)
+    return res;
+
+  (x > 0) ? __dubsin (x, dx, w) : __dubsin (-x, -dx, w);
+  if (w[1] > 0)
+    cor = 1.000000001 * w[1] + fabs (orig) * 1.1e-30;
+  else
+    cor = 1.000000001 * w[1] - fabs (orig) * 1.1e-30;
+
+  if (w[0] == w[0] + cor)
+    return (x > 0) ? w[0] : -w[0];
+
+  t = (orig * hpinv + toint);
+  xn = t - toint;
+  y = (orig - xn * mp1) - xn * mp2;
+  da = xn * pp3;
+  t = y - da;
+  da = (y - t) - da;
+  y = xn * pp4;
+  a = t - y;
+  da = ((t - a) - y) + da;
+
+  if (n & 2)
+    {
+      a = -a;
+      da = -da;
+    }
+  (a > 0) ? __dubsin (a, da, w) : __dubsin (-a, -da, w);
+  if (w[1] > 0)
+    cor = 1.000000001 * w[1] + fabs (orig) * 1.1e-40;
+  else
+    cor = 1.000000001 * w[1] - fabs (orig) * 1.1e-40;
+
+  if (w[0] == w[0] + cor)
+    return (a > 0) ? w[0] : -w[0];
+
+  return (n & 1) ? __mpcos (orig, 0, true) : __mpsin (orig, 0, true);
+}
+
+/* Like sloww1 and csloww1, except that it accepts the quadrant and decides to
+   call mpsin or mpcos based on that.  */
+static double
+sincos_sloww1 (double x, double dx, double orig, int n)
+{
+  mynumber u;
+  double w[2], y, cor, res, t;
+
+  t = fabs (x);
+  if (x < 0)
+    dx = -dx;
+
+  u.x = big + t;
+  y = t - (u.x - big);
+  res = do_sin_slow (u, y, dx, 3.1e-30 * fabs (orig), &cor);
+
+  if (res == res + cor)
+    return (x > 0) ? res : -res;
+
+  __dubsin (t, dx, w);
+
+  if (w[1] > 0)
+    cor = 1.000000005 * w[1] + 1.1e-30 * fabs (orig);
+  else
+    cor = 1.000000005 * w[1] - 1.1e-30 * fabs (orig);
+
+  if (w[0] == w[0] + cor)
+    return (x > 0) ? w[0] : -w[0];
+
+  return (n & 1) ? __mpcos (orig, 0, true) : __mpsin (orig, 0, true);
+}
+
+/* Like sloww2 and csloww2, except that it accepts the quadrant and decides to
+   call mpsin or mpcos based on that.  */
+static double
+sincos_sloww2 (double x, double dx, double orig, int n)
+{
+  mynumber u;
+  double w[2], y, cor, res;
+
+  u.x = big + x;
+  y = x - (u.x - big);
+  res = do_cos_slow (u, y, dx, 3.1e-30 * fabs (orig), &cor);
+
+  if (res == res + cor)
+    return (n & 2) ? -res : res;
+
+  __docos (x, dx, w);
+
+  if (w[1] > 0)
+    cor = 1.000000005 * w[1] + 1.1e-30 * fabs (orig);
+  else
+    cor = 1.000000005 * w[1] - 1.1e-30 * fabs (orig);
+
+  if (w[0] == w[0] + cor)
+    return (n & 2) ? -w[0] : w[0];
+
+  return (n & 1) ? __mpsin (orig, 0, true) : __mpcos (orig, 0, true);
+}
+
+/* Compute sin (A + DA).  cos can be computed by shifting the quadrant N
+   clockwise.  */
+static double
+__always_inline
+do_sincos_1 (double a, double da, double x, int4 n)
+{
+  double xx, retval, res, cor, y;
+  mynumber u;
+  int m;
+  double eps = fabs (x) * 1.2e-30;
+
+  switch (n)
+    {			/* quarter of unit circle */
+    case 2:
+      a = -a;
+      da = -da;
+    case 0:
+      xx = a * a;
+      if (xx < 0.01588)
+	{
+	  /* Taylor series.  */
+	  res = TAYLOR_SIN (xx, a, da, cor);
+	  cor = (cor > 0) ? 1.02 * cor + eps : 1.02 * cor - eps;
+	  retval = (res == res + cor) ? res : sincos_sloww (a, da, x, n);
+	}
+      else
+	{
+	  double b = a, db = da;
+	  if (a > 0)
+	    m = 1;
+	  else
+	    {
+	      m = 0;
+	      b = -b;
+	      db = -db;
+	    }
+	  u.x = big + b;
+	  y = b - (u.x - big);
+	  res = do_sin (u, y, db, &cor);
+	  cor = (cor > 0) ? 1.035 * cor + eps : 1.035 * cor - eps;
+	  retval = ((res == res + cor) ? ((m) ? res : -res)
+		    : sincos_sloww1 (a, da, x, n));
+	}
+      break;
+
+    case 1:
+    case 3:
+      if (a < 0)
+	{
+	  a = -a;
+	  da = -da;
+	}
+      u.x = big + a;
+      y = a - (u.x - big) + da;
+      res = do_cos (u, y, &cor);
+      cor = (cor > 0) ? 1.025 * cor + eps : 1.025 * cor - eps;
+      retval = ((res == res + cor) ? ((n & 2) ? -res : res)
+		: sincos_sloww2 (a, da, x, n));
+      break;
+    }
+
+  return retval;
+}
+
 void
 __sincos (double x, double *sinx, double *cosx)
 {
@@ -419,12 +461,29 @@ __sincos (double x, double *sinx, double *cosx)
 
   u.x = x;
   k = 0x7fffffff & u.i[HIGH_HALF];
-  if (k < 0x419921FB)
+
+  if (k < 0x400368fd)
     {
       *sinx = __sin_local (x, k);
       *cosx = __cos_local (x, k);
       return;
     }
+  if (k < 0x419921FB)
+    {
+      double t = (x * hpinv + toint);
+      double xn = t - toint;
+      u.x = t;
+      double y = (x - xn * mp1) - xn * mp2;
+      int4 n = u.i[LOW_HALF] & 3;
+      double da = xn * mp3;
+      double a = y - da;
+      da = (y - a) - da;
+
+      *sinx = do_sincos_1 (a, da, x, n);
+      *cosx = do_sincos_1 (a, da, x, (n + 1) & 3);
+
+      return;
+    }
   if (k < 0x42F00000)
     {
       double t = (x * hpinv + toint);
