Format floating routines.

1 files changed, 126 insertions, 97 deletions

diff --git a/sysdeps/ieee754/dbl-64/s_expm1.c b/sysdeps/ieee754/dbl-64/s_expm1.c
index 87da7eb7e6..9c9bb34559 100644
--- a/sysdeps/ieee754/dbl-64/s_expm1.c
+++ b/sysdeps/ieee754/dbl-64/s_expm1.c
@@ -11,7 +11,7 @@
  */
 /* Modified by Naohiko Shimizu/Tokai University, Japan 1997/08/25,
    for performance improvement on pipelined processors.
-*/
+ */
 
 /* expm1(x)
  * Returns exp(x)-1, the exponential of x minus 1.
@@ -113,116 +113,145 @@
 #include <math_private.h>
 #define one Q[0]
 static const double
-huge		= 1.0e+300,
-tiny		= 1.0e-300,
-o_threshold	= 7.09782712893383973096e+02,/* 0x40862E42, 0xFEFA39EF */
-ln2_hi		= 6.93147180369123816490e-01,/* 0x3fe62e42, 0xfee00000 */
-ln2_lo		= 1.90821492927058770002e-10,/* 0x3dea39ef, 0x35793c76 */
-invln2		= 1.44269504088896338700e+00,/* 0x3ff71547, 0x652b82fe */
-	/* scaled coefficients related to expm1 */
-Q[]  =  {1.0, -3.33333333333331316428e-02, /* BFA11111 111110F4 */
-   1.58730158725481460165e-03, /* 3F5A01A0 19FE5585 */
-  -7.93650757867487942473e-05, /* BF14CE19 9EAADBB7 */
-   4.00821782732936239552e-06, /* 3ED0CFCA 86E65239 */
-  -2.01099218183624371326e-07}; /* BE8AFDB7 6E09C32D */
+  huge = 1.0e+300,
+  tiny = 1.0e-300,
+  o_threshold = 7.09782712893383973096e+02,  /* 0x40862E42, 0xFEFA39EF */
+  ln2_hi = 6.93147180369123816490e-01,       /* 0x3fe62e42, 0xfee00000 */
+  ln2_lo = 1.90821492927058770002e-10,       /* 0x3dea39ef, 0x35793c76 */
+  invln2 = 1.44269504088896338700e+00,       /* 0x3ff71547, 0x652b82fe */
+/* scaled coefficients related to expm1 */
+  Q[] = { 1.0, -3.33333333333331316428e-02, /* BFA11111 111110F4 */
+	  1.58730158725481460165e-03, /* 3F5A01A0 19FE5585 */
+	  -7.93650757867487942473e-05, /* BF14CE19 9EAADBB7 */
+	  4.00821782732936239552e-06, /* 3ED0CFCA 86E65239 */
+	  -2.01099218183624371326e-07 }; /* BE8AFDB7 6E09C32D */
 
 double
-__expm1(double x)
+__expm1 (double x)
 {
-	double y,hi,lo,c,t,e,hxs,hfx,r1,h2,h4,R1,R2,R3;
-	int32_t k,xsb;
-	u_int32_t hx;
+  double y, hi, lo, c, t, e, hxs, hfx, r1, h2, h4, R1, R2, R3;
+  int32_t k, xsb;
+  u_int32_t hx;
 
-	GET_HIGH_WORD(hx,x);
-	xsb = hx&0x80000000;		/* sign bit of x */
-	if(xsb==0) y=x; else y= -x;	/* y = |x| */
-	hx &= 0x7fffffff;		/* high word of |x| */
+  GET_HIGH_WORD (hx, x);
+  xsb = hx & 0x80000000;                /* sign bit of x */
+  if (xsb == 0)
+    y = x;
+  else
+    y = -x;                             /* y = |x| */
+  hx &= 0x7fffffff;                     /* high word of |x| */
 
-    /* filter out huge and non-finite argument */
-	if(hx >= 0x4043687A) {			/* if |x|>=56*ln2 */
-	    if(hx >= 0x40862E42) {		/* if |x|>=709.78... */
-		if(hx>=0x7ff00000) {
-		    u_int32_t low;
-		    GET_LOW_WORD(low,x);
-		    if(((hx&0xfffff)|low)!=0)
-			 return x+x;	 /* NaN */
-		    else return (xsb==0)? x:-1.0;/* exp(+-inf)={inf,-1} */
-		}
-		if(x > o_threshold) {
-		  __set_errno (ERANGE);
-		  return huge*huge; /* overflow */
-		}
+  /* filter out huge and non-finite argument */
+  if (hx >= 0x4043687A)                         /* if |x|>=56*ln2 */
+    {
+      if (hx >= 0x40862E42)                     /* if |x|>=709.78... */
+	{
+	  if (hx >= 0x7ff00000)
+	    {
+	      u_int32_t low;
+	      GET_LOW_WORD (low, x);
+	      if (((hx & 0xfffff) | low) != 0)
+		return x + x;            /* NaN */
+	      else
+		return (xsb == 0) ? x : -1.0;    /* exp(+-inf)={inf,-1} */
 	    }
-	    if(xsb!=0) { /* x < -56*ln2, return -1.0 with inexact */
-		math_force_eval(x+tiny);	/* raise inexact */
-		return tiny-one;	/* return -1 */
+	  if (x > o_threshold)
+	    {
+	      __set_errno (ERANGE);
+	      return huge * huge;   /* overflow */
 	    }
 	}
+      if (xsb != 0)      /* x < -56*ln2, return -1.0 with inexact */
+	{
+	  math_force_eval (x + tiny);           /* raise inexact */
+	  return tiny - one;            /* return -1 */
+	}
+    }
 
-    /* argument reduction */
-	if(hx > 0x3fd62e42) {		/* if  |x| > 0.5 ln2 */
-	    if(hx < 0x3FF0A2B2) {	/* and |x| < 1.5 ln2 */
-		if(xsb==0)
-		    {hi = x - ln2_hi; lo =  ln2_lo;  k =  1;}
-		else
-		    {hi = x + ln2_hi; lo = -ln2_lo;  k = -1;}
-	    } else {
-		k  = invln2*x+((xsb==0)?0.5:-0.5);
-		t  = k;
-		hi = x - t*ln2_hi;	/* t*ln2_hi is exact here */
-		lo = t*ln2_lo;
+  /* argument reduction */
+  if (hx > 0x3fd62e42)                  /* if  |x| > 0.5 ln2 */
+    {
+      if (hx < 0x3FF0A2B2)              /* and |x| < 1.5 ln2 */
+	{
+	  if (xsb == 0)
+	    {
+	      hi = x - ln2_hi; lo = ln2_lo;  k = 1;
+	    }
+	  else
+	    {
+	      hi = x + ln2_hi; lo = -ln2_lo;  k = -1;
 	    }
-	    x  = hi - lo;
-	    c  = (hi-x)-lo;
 	}
-	else if(hx < 0x3c900000) {	/* when |x|<2**-54, return x */
-	    t = huge+x;	/* return x with inexact flags when x!=0 */
-	    return x - (t-(huge+x));
+      else
+	{
+	  k = invln2 * x + ((xsb == 0) ? 0.5 : -0.5);
+	  t = k;
+	  hi = x - t * ln2_hi;          /* t*ln2_hi is exact here */
+	  lo = t * ln2_lo;
 	}
-	else k = 0;
+      x = hi - lo;
+      c = (hi - x) - lo;
+    }
+  else if (hx < 0x3c900000)             /* when |x|<2**-54, return x */
+    {
+      t = huge + x;     /* return x with inexact flags when x!=0 */
+      return x - (t - (huge + x));
+    }
+  else
+    k = 0;
 
-    /* x is now in primary range */
-	hfx = 0.5*x;
-	hxs = x*hfx;
-	R1 = one+hxs*Q[1]; h2 = hxs*hxs;
-	R2 = Q[2]+hxs*Q[3]; h4 = h2*h2;
-	R3 = Q[4]+hxs*Q[5];
-	r1 = R1 + h2*R2 + h4*R3;
-	t  = 3.0-r1*hfx;
-	e  = hxs*((r1-t)/(6.0 - x*t));
-	if(k==0) return x - (x*e-hxs);		/* c is 0 */
-	else {
-	    e  = (x*(e-c)-c);
-	    e -= hxs;
-	    if(k== -1) return 0.5*(x-e)-0.5;
-	    if(k==1) {
-		if(x < -0.25) return -2.0*(e-(x+0.5));
-		else	      return  one+2.0*(x-e);
-	    }
-	    if (k <= -2 || k>56) {   /* suffice to return exp(x)-1 */
-		u_int32_t high;
-		y = one-(e-x);
-		GET_HIGH_WORD(high,y);
-		SET_HIGH_WORD(y,high+(k<<20));	/* add k to y's exponent */
-		return y-one;
-	    }
-	    t = one;
-	    if(k<20) {
-		u_int32_t high;
-		SET_HIGH_WORD(t,0x3ff00000 - (0x200000>>k));  /* t=1-2^-k */
-		y = t-(e-x);
-		GET_HIGH_WORD(high,y);
-		SET_HIGH_WORD(y,high+(k<<20));	/* add k to y's exponent */
-	   } else {
-		u_int32_t high;
-		SET_HIGH_WORD(t,((0x3ff-k)<<20));	/* 2^-k */
-		y = x-(e+t);
-		y += one;
-		GET_HIGH_WORD(high,y);
-		SET_HIGH_WORD(y,high+(k<<20));	/* add k to y's exponent */
-	    }
+  /* x is now in primary range */
+  hfx = 0.5 * x;
+  hxs = x * hfx;
+  R1 = one + hxs * Q[1]; h2 = hxs * hxs;
+  R2 = Q[2] + hxs * Q[3]; h4 = h2 * h2;
+  R3 = Q[4] + hxs * Q[5];
+  r1 = R1 + h2 * R2 + h4 * R3;
+  t = 3.0 - r1 * hfx;
+  e = hxs * ((r1 - t) / (6.0 - x * t));
+  if (k == 0)
+    return x - (x * e - hxs);                   /* c is 0 */
+  else
+    {
+      e = (x * (e - c) - c);
+      e -= hxs;
+      if (k == -1)
+	return 0.5 * (x - e) - 0.5;
+      if (k == 1)
+	{
+	  if (x < -0.25)
+	    return -2.0 * (e - (x + 0.5));
+	  else
+	    return one + 2.0 * (x - e);
+	}
+      if (k <= -2 || k > 56)         /* suffice to return exp(x)-1 */
+	{
+	  u_int32_t high;
+	  y = one - (e - x);
+	  GET_HIGH_WORD (high, y);
+	  SET_HIGH_WORD (y, high + (k << 20));  /* add k to y's exponent */
+	  return y - one;
+	}
+      t = one;
+      if (k < 20)
+	{
+	  u_int32_t high;
+	  SET_HIGH_WORD (t, 0x3ff00000 - (0x200000 >> k));    /* t=1-2^-k */
+	  y = t - (e - x);
+	  GET_HIGH_WORD (high, y);
+	  SET_HIGH_WORD (y, high + (k << 20));  /* add k to y's exponent */
+	}
+      else
+	{
+	  u_int32_t high;
+	  SET_HIGH_WORD (t, ((0x3ff - k) << 20));       /* 2^-k */
+	  y = x - (e + t);
+	  y += one;
+	  GET_HIGH_WORD (high, y);
+	  SET_HIGH_WORD (y, high + (k << 20));  /* add k to y's exponent */
 	}
-	return y;
+    }
+  return y;
 }
 weak_alias (__expm1, expm1)
 #ifdef NO_LONG_DOUBLE