From d7826aa149d2e85128a7ecf8fadc950ab9fe7a22 Mon Sep 17 00:00:00 2001
From: Ulrich Drepper <drepper@gmail.com>
Date: Tue, 25 Oct 2011 10:52:45 -0400
Subject: [PATCH] Use math_force_eval in more places

---
 ChangeLog                                    | 22 ++++++
 sysdeps/ieee754/dbl-64/e_atanh.c             |  7 +-
 sysdeps/ieee754/dbl-64/e_j0.c                |  7 +-
 sysdeps/ieee754/dbl-64/s_ceil.c              | 34 ++++-----
 sysdeps/ieee754/dbl-64/s_expm1.c             | 78 +++++++++-----------
 sysdeps/ieee754/dbl-64/s_floor.c             | 33 ++++-----
 sysdeps/ieee754/dbl-64/s_log1p.c             | 52 +++++--------
 sysdeps/ieee754/dbl-64/s_round.c             | 43 +++++------
 sysdeps/ieee754/dbl-64/wordsize-64/s_ceil.c  | 16 ++--
 sysdeps/ieee754/dbl-64/wordsize-64/s_floor.c | 16 ++--
 sysdeps/ieee754/dbl-64/wordsize-64/s_round.c | 24 +++---
 sysdeps/ieee754/flt-32/e_atanhf.c            |  7 +-
 sysdeps/ieee754/flt-32/e_j0f.c               |  7 +-
 sysdeps/ieee754/flt-32/s_ceilf.c             | 14 ++--
 sysdeps/ieee754/flt-32/s_expm1f.c            | 52 +++++--------
 sysdeps/ieee754/flt-32/s_floorf.c            | 16 ++--
 sysdeps/ieee754/flt-32/s_log1pf.c            | 42 ++++-------
 sysdeps/ieee754/flt-32/s_roundf.c            | 24 +++---
 sysdeps/ieee754/ldbl-96/e_atanhl.c           |  5 +-
 sysdeps/ieee754/ldbl-96/e_j0l.c              | 13 ++--
 sysdeps/ieee754/ldbl-96/s_roundl.c           | 55 +++++++-------
 21 files changed, 257 insertions(+), 310 deletions(-)

diff --git a/ChangeLog b/ChangeLog
index 1046feee0b..76a21df3aa 100644
--- a/ChangeLog
+++ b/ChangeLog
@@ -1,5 +1,27 @@
 2011-10-25  Ulrich Drepper  <drepper@gmail.com>
 
+	* sysdeps/ieee754/dbl-64/e_atanh.c: Use math_force_eval instead of a
+	useful if() expression.
+	* sysdeps/ieee754/dbl-64/e_j0.c: Likewise.
+	* sysdeps/ieee754/dbl-64/s_ceil.c: Likewise.
+	* sysdeps/ieee754/dbl-64/s_expm1.c: Likewise.
+	* sysdeps/ieee754/dbl-64/s_floor.c: Likewise.
+	* sysdeps/ieee754/dbl-64/s_log1p.c: Likewise.
+	* sysdeps/ieee754/dbl-64/s_round.c: Likewise.
+	* sysdeps/ieee754/dbl-64/wordsize-64/s_ceil.c: Likewise.
+	* sysdeps/ieee754/dbl-64/wordsize-64/s_floor.c: Likewise.
+	* sysdeps/ieee754/dbl-64/wordsize-64/s_round.c: Likewise.
+	* sysdeps/ieee754/flt-32/e_atanhf.c: Likewise.
+	* sysdeps/ieee754/flt-32/e_j0f.c: Likewise.
+	* sysdeps/ieee754/flt-32/s_ceilf.c: Likewise.
+	* sysdeps/ieee754/flt-32/s_expm1f.c: Likewise.
+	* sysdeps/ieee754/flt-32/s_floorf.c: Likewise.
+	* sysdeps/ieee754/flt-32/s_log1pf.c: Likewise.
+	* sysdeps/ieee754/flt-32/s_roundf.c: Likewise.
+	* sysdeps/ieee754/ldbl-96/e_atanhl.c: Likewise.
+	* sysdeps/ieee754/ldbl-96/e_j0l.c: Likewise.
+	* sysdeps/ieee754/ldbl-96/s_roundl.c: Likewise.
+
 	* sysdeps/x86_64/fpu/math_private.h: Use VEX encoding when possible.
 
 2011-10-25  Andreas Schwab  <schwab@redhat.com>
diff --git a/sysdeps/ieee754/dbl-64/e_atanh.c b/sysdeps/ieee754/dbl-64/e_atanh.c
index de3bc8f144..1f83e31981 100644
--- a/sysdeps/ieee754/dbl-64/e_atanh.c
+++ b/sysdeps/ieee754/dbl-64/e_atanh.c
@@ -49,8 +49,11 @@ __ieee754_atanh (double x)
   double t;
   if (xa < 0.5)
     {
-      if (__builtin_expect (xa < 0x1.0p-28, 0) && (huge + x) > 0.0)
-	return x;
+      if (__builtin_expect (xa < 0x1.0p-28, 0))
+	{
+	  math_force_eval (huge + x);
+	  return x;
+	}
 
       t = xa + xa;
       t = 0.5 * __log1p (t + t * xa / (1.0 - xa));
diff --git a/sysdeps/ieee754/dbl-64/e_j0.c b/sysdeps/ieee754/dbl-64/e_j0.c
index 5ebf2056bf..48584a60b4 100644
--- a/sysdeps/ieee754/dbl-64/e_j0.c
+++ b/sysdeps/ieee754/dbl-64/e_j0.c
@@ -111,10 +111,9 @@ __ieee754_j0(double x)
 		return z;
 	}
 	if(ix<0x3f200000) {	/* |x| < 2**-13 */
-	    if(huge+x>one) {	/* raise inexact if x != 0 */
-		if(ix<0x3e400000) return one;	/* |x|<2**-27 */
-		else	      return one - 0.25*x*x;
-	    }
+	  math_force_eval(huge+x);	/* raise inexact if x != 0 */
+	  if(ix<0x3e400000) return one;	/* |x|<2**-27 */
+	  else	      return one - 0.25*x*x;
 	}
 	z = x*x;
 #ifdef DO_NOT_USE_THIS
diff --git a/sysdeps/ieee754/dbl-64/s_ceil.c b/sysdeps/ieee754/dbl-64/s_ceil.c
index 695cae5d53..de50e29bf2 100644
--- a/sysdeps/ieee754/dbl-64/s_ceil.c
+++ b/sysdeps/ieee754/dbl-64/s_ceil.c
@@ -32,18 +32,17 @@ __ceil(double x)
 	EXTRACT_WORDS(i0,i1,x);
 	j0 = ((i0>>20)&0x7ff)-0x3ff;
 	if(j0<20) {
-	    if(j0<0) { 	/* raise inexact if x != 0 */
-		if(huge+x>0.0) {/* return 0*sign(x) if |x|<1 */
-		    if(i0<0) {i0=0x80000000;i1=0;}
-		    else if((i0|i1)!=0) { i0=0x3ff00000;i1=0;}
-		}
+	    if(j0<0) {	/* raise inexact if x != 0 */
+		math_force_eval(huge+x);
+		/* return 0*sign(x) if |x|<1 */
+		if(i0<0) {i0=0x80000000;i1=0;}
+		else if((i0|i1)!=0) { i0=0x3ff00000;i1=0;}
 	    } else {
 		i = (0x000fffff)>>j0;
 		if(((i0&i)|i1)==0) return x; /* x is integral */
-		if(huge+x>0.0) {	/* raise inexact flag */
-		    if(i0>0) i0 += (0x00100000)>>j0;
-		    i0 &= (~i); i1=0;
-		}
+		math_force_eval(huge+x);	/* raise inexact flag */
+		if(i0>0) i0 += (0x00100000)>>j0;
+		i0 &= (~i); i1=0;
 	    }
 	} else if (j0>51) {
 	    if(j0==0x400) return x+x;	/* inf or NaN */
@@ -51,17 +50,16 @@ __ceil(double x)
 	} else {
 	    i = ((u_int32_t)(0xffffffff))>>(j0-20);
 	    if((i1&i)==0) return x;	/* x is integral */
-	    if(huge+x>0.0) { 		/* raise inexact flag */
-		if(i0>0) {
-		    if(j0==20) i0+=1;
-		    else {
-			j = i1 + (1<<(52-j0));
-			if(j<i1) i0+=1;	/* got a carry */
-			i1 = j;
-		    }
+	    math_force_eval(huge+x);		/* raise inexact flag */
+	    if(i0>0) {
+		if(j0==20) i0+=1;
+		else {
+		    j = i1 + (1<<(52-j0));
+		    if(j<i1) i0+=1;	/* got a carry */
+		    i1 = j;
 		}
-		i1 &= (~i);
 	    }
+	    i1 &= (~i);
 	}
 	INSERT_WORDS(x,i0,i1);
 	return x;
diff --git a/sysdeps/ieee754/dbl-64/s_expm1.c b/sysdeps/ieee754/dbl-64/s_expm1.c
index 324354336e..589128c08c 100644
--- a/sysdeps/ieee754/dbl-64/s_expm1.c
+++ b/sysdeps/ieee754/dbl-64/s_expm1.c
@@ -13,10 +13,6 @@
    for performance improvement on pipelined processors.
 */
 
-#if defined(LIBM_SCCS) && !defined(lint)
-static char rcsid[] = "$NetBSD: s_expm1.c,v 1.8 1995/05/10 20:47:09 jtc Exp $";
-#endif
-
 /* expm1(x)
  * Returns exp(x)-1, the exponential of x minus 1.
  *
@@ -40,38 +36,38 @@ static char rcsid[] = "$NetBSD: s_expm1.c,v 1.8 1995/05/10 20:47:09 jtc Exp $";
  *		     = 6/r * ( 1 + 2.0*(1/(exp(r)-1) - 1/r))
  *		     = 1 - r^2/60 + r^4/2520 - r^6/100800 + ...
  *      We use a special Reme algorithm on [0,0.347] to generate
- * 	a polynomial of degree 5 in r*r to approximate R1. The
+ *	a polynomial of degree 5 in r*r to approximate R1. The
  *	maximum error of this polynomial approximation is bounded
  *	by 2**-61. In other words,
  *	    R1(z) ~ 1.0 + Q1*z + Q2*z**2 + Q3*z**3 + Q4*z**4 + Q5*z**5
- *	where 	Q1  =  -1.6666666666666567384E-2,
- * 		Q2  =   3.9682539681370365873E-4,
- * 		Q3  =  -9.9206344733435987357E-6,
- * 		Q4  =   2.5051361420808517002E-7,
- * 		Q5  =  -6.2843505682382617102E-9;
- *  	(where z=r*r, and the values of Q1 to Q5 are listed below)
+ *	where	Q1  =  -1.6666666666666567384E-2,
+ *		Q2  =   3.9682539681370365873E-4,
+ *		Q3  =  -9.9206344733435987357E-6,
+ *		Q4  =   2.5051361420808517002E-7,
+ *		Q5  =  -6.2843505682382617102E-9;
+ *	(where z=r*r, and the values of Q1 to Q5 are listed below)
  *	with error bounded by
  *	    |                  5           |     -61
  *	    | 1.0+Q1*z+...+Q5*z   -  R1(z) | <= 2
  *	    |                              |
  *
  *	expm1(r) = exp(r)-1 is then computed by the following
- * 	specific way which minimize the accumulation rounding error:
+ *	specific way which minimize the accumulation rounding error:
  *			       2     3
  *			      r     r    [ 3 - (R1 + R1*r/2)  ]
  *	      expm1(r) = r + --- + --- * [--------------------]
- *		              2     2    [ 6 - r*(3 - R1*r/2) ]
+ *			      2     2    [ 6 - r*(3 - R1*r/2) ]
  *
  *	To compensate the error in the argument reduction, we use
  *		expm1(r+c) = expm1(r) + c + expm1(r)*c
  *			   ~ expm1(r) + c + r*c
  *	Thus c+r*c will be added in as the correction terms for
  *	expm1(r+c). Now rearrange the term to avoid optimization
- * 	screw up:
- *		        (      2                                    2 )
- *		        ({  ( r    [ R1 -  (3 - R1*r/2) ]  )  }    r  )
+ *	screw up:
+ *			(      2                                    2 )
+ *			({  ( r    [ R1 -  (3 - R1*r/2) ]  )  }    r  )
  *	 expm1(r+c)~r - ({r*(--- * [--------------------]-c)-c} - --- )
- *	                ({  ( 2    [ 6 - r*(3 - R1*r/2) ]  )  }    2  )
+ *			({  ( 2    [ 6 - r*(3 - R1*r/2) ]  )  }    2  )
  *                      (                                             )
  *
  *		   = r - E
@@ -87,7 +83,7 @@ static char rcsid[] = "$NetBSD: s_expm1.c,v 1.8 1995/05/10 20:47:09 jtc Exp $";
  *	  (ii)  if k=0, return r-E
  *	  (iii) if k=-1, return 0.5*(r-E)-0.5
  *        (iv)	if k=1 if r < -0.25, return 2*((r+0.5)- E)
- *	       	       else	     return  1.0+2.0*(r-E);
+ *		       else	     return  1.0+2.0*(r-E);
  *	  (v)   if (k<-2||k>56) return 2^k(1-(E-r)) - 1 (or exp(x)-1)
  *	  (vi)  if k <= 20, return 2^k((1-2^-k)-(E-r)), else
  *	  (vii) return 2^k(1-((E+2^-k)-r))
@@ -116,11 +112,7 @@ static char rcsid[] = "$NetBSD: s_expm1.c,v 1.8 1995/05/10 20:47:09 jtc Exp $";
 #include "math.h"
 #include "math_private.h"
 #define one Q[0]
-#ifdef __STDC__
 static const double
-#else
-static double
-#endif
 huge		= 1.0e+300,
 tiny		= 1.0e-300,
 o_threshold	= 7.09782712893383973096e+02,/* 0x40862E42, 0xFEFA39EF */
@@ -134,12 +126,8 @@ Q[]  =  {1.0, -3.33333333333331316428e-02, /* BFA11111 111110F4 */
    4.00821782732936239552e-06, /* 3ED0CFCA 86E65239 */
   -2.01099218183624371326e-07}; /* BE8AFDB7 6E09C32D */
 
-#ifdef __STDC__
-	double __expm1(double x)
-#else
-	double __expm1(x)
-	double x;
-#endif
+double
+__expm1(double x)
 {
 	double y,hi,lo,c,t,e,hxs,hfx,r1,h2,h4,R1,R2,R3;
 	int32_t k,xsb;
@@ -153,20 +141,20 @@ Q[]  =  {1.0, -3.33333333333331316428e-02, /* BFA11111 111110F4 */
     /* filter out huge and non-finite argument */
 	if(hx >= 0x4043687A) {			/* if |x|>=56*ln2 */
 	    if(hx >= 0x40862E42) {		/* if |x|>=709.78... */
-                if(hx>=0x7ff00000) {
+		if(hx>=0x7ff00000) {
 		    u_int32_t low;
 		    GET_LOW_WORD(low,x);
 		    if(((hx&0xfffff)|low)!=0)
-		         return x+x; 	 /* NaN */
+			 return x+x;	 /* NaN */
 		    else return (xsb==0)? x:-1.0;/* exp(+-inf)={inf,-1} */
-	        }
-	        if(x > o_threshold) {
+		}
+		if(x > o_threshold) {
 		  __set_errno (ERANGE);
 		  return huge*huge; /* overflow */
 		}
 	    }
 	    if(xsb!=0) { /* x < -56*ln2, return -1.0 with inexact */
-		if(x+tiny<0.0)		/* raise inexact */
+		math_force_eval(x+tiny);	/* raise inexact */
 		return tiny-one;	/* return -1 */
 	    }
 	}
@@ -187,7 +175,7 @@ Q[]  =  {1.0, -3.33333333333331316428e-02, /* BFA11111 111110F4 */
 	    x  = hi - lo;
 	    c  = (hi-x)-lo;
 	}
-	else if(hx < 0x3c900000) {  	/* when |x|<2**-54, return x */
+	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));
 	}
@@ -212,28 +200,28 @@ Q[]  =  {1.0, -3.33333333333331316428e-02, /* BFA11111 111110F4 */
 	    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(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);
+		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;
+		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);
+		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;
+		u_int32_t high;
 		SET_HIGH_WORD(t,((0x3ff-k)<<20));	/* 2^-k */
-	       	y = x-(e+t);
-	       	y += one;
+		y = x-(e+t);
+		y += one;
 		GET_HIGH_WORD(high,y);
 		SET_HIGH_WORD(y,high+(k<<20));	/* add k to y's exponent */
 	    }
diff --git a/sysdeps/ieee754/dbl-64/s_floor.c b/sysdeps/ieee754/dbl-64/s_floor.c
index 5b593ca316..8b2038e69d 100644
--- a/sysdeps/ieee754/dbl-64/s_floor.c
+++ b/sysdeps/ieee754/dbl-64/s_floor.c
@@ -41,18 +41,16 @@ static double huge = 1.0e300;
 	j0 = ((i0>>20)&0x7ff)-0x3ff;
 	if(j0<20) {
 	    if(j0<0) {	/* raise inexact if x != 0 */
-		if(huge+x>0.0) {/* return 0*sign(x) if |x|<1 */
-		    if(i0>=0) {i0=i1=0;}
-		    else if(((i0&0x7fffffff)|i1)!=0)
-			{ i0=0xbff00000;i1=0;}
-		}
+		math_force_eval(huge+x);/* return 0*sign(x) if |x|<1 */
+		if(i0>=0) {i0=i1=0;}
+		else if(((i0&0x7fffffff)|i1)!=0)
+		  { i0=0xbff00000;i1=0;}
 	    } else {
 		i = (0x000fffff)>>j0;
 		if(((i0&i)|i1)==0) return x; /* x is integral */
-		if(huge+x>0.0) {	/* raise inexact flag */
-		    if(i0<0) i0 += (0x00100000)>>j0;
-		    i0 &= (~i); i1=0;
-		}
+		math_force_eval(huge+x);	/* raise inexact flag */
+		if(i0<0) i0 += (0x00100000)>>j0;
+		i0 &= (~i); i1=0;
 	    }
 	} else if (j0>51) {
 	    if(j0==0x400) return x+x;	/* inf or NaN */
@@ -60,17 +58,16 @@ static double huge = 1.0e300;
 	} else {
 	    i = ((u_int32_t)(0xffffffff))>>(j0-20);
 	    if((i1&i)==0) return x;	/* x is integral */
-	    if(huge+x>0.0) {		/* raise inexact flag */
-		if(i0<0) {
-		    if(j0==20) i0+=1;
-		    else {
-			j = i1+(1<<(52-j0));
-			if(j<i1) i0 +=1 ;	/* got a carry */
-			i1=j;
-		    }
+	    math_force_eval(huge+x);		/* raise inexact flag */
+	    if(i0<0) {
+		if(j0==20) i0+=1;
+		else {
+		    j = i1+(1<<(52-j0));
+		    if(j<i1) i0 +=1 ;	/* got a carry */
+		    i1=j;
 		}
-		i1 &= (~i);
 	    }
+	    i1 &= (~i);
 	}
 	INSERT_WORDS(x,i0,i1);
 	return x;
diff --git a/sysdeps/ieee754/dbl-64/s_log1p.c b/sysdeps/ieee754/dbl-64/s_log1p.c
index 0a9801a931..dc79a02bb3 100644
--- a/sysdeps/ieee754/dbl-64/s_log1p.c
+++ b/sysdeps/ieee754/dbl-64/s_log1p.c
@@ -13,10 +13,6 @@
    for performance improvement on pipelined processors.
 */
 
-#if defined(LIBM_SCCS) && !defined(lint)
-static char rcsid[] = "$NetBSD: s_log1p.c,v 1.8 1995/05/10 20:47:46 jtc Exp $";
-#endif
-
 /* double log1p(double x)
  *
  * Method :
@@ -34,14 +30,14 @@ static char rcsid[] = "$NetBSD: s_log1p.c,v 1.8 1995/05/10 20:47:46 jtc Exp $";
  *   2. Approximation of log1p(f).
  *	Let s = f/(2+f) ; based on log(1+f) = log(1+s) - log(1-s)
  *		 = 2s + 2/3 s**3 + 2/5 s**5 + .....,
- *	     	 = 2s + s*R
+ *		 = 2s + s*R
  *      We use a special Reme algorithm on [0,0.1716] to generate
- * 	a polynomial of degree 14 to approximate R The maximum error
+ *	a polynomial of degree 14 to approximate R The maximum error
  *	of this polynomial approximation is bounded by 2**-58.45. In
  *	other words,
- *		        2      4      6      8      10      12      14
+ *			2      4      6      8      10      12      14
  *	    R(z) ~ Lp1*s +Lp2*s +Lp3*s +Lp4*s +Lp5*s  +Lp6*s  +Lp7*s
- *  	(the values of Lp1 to Lp7 are listed in the program)
+ *	(the values of Lp1 to Lp7 are listed in the program)
  *	and
  *	    |      2          14          |     -58.45
  *	    | Lp1*s +...+Lp7*s    -  R(z) | <= 2
@@ -52,7 +48,7 @@ static char rcsid[] = "$NetBSD: s_log1p.c,v 1.8 1995/05/10 20:47:46 jtc Exp $";
  *		log1p(f) = f - (hfsq - s*(hfsq+R)).
  *
  *	3. Finally, log1p(x) = k*ln2 + log1p(f).
- *		 	     = k*ln2_hi+(f-(hfsq-(s*(hfsq+R)+k*ln2_lo)))
+ *			     = k*ln2_hi+(f-(hfsq-(s*(hfsq+R)+k*ln2_lo)))
  *	   Here ln2 is split into two floating point number:
  *			ln2_hi + ln2_lo,
  *	   where n*ln2_hi is always exact for |n| < 2000.
@@ -73,7 +69,7 @@ static char rcsid[] = "$NetBSD: s_log1p.c,v 1.8 1995/05/10 20:47:46 jtc Exp $";
  * to produce the hexadecimal values shown.
  *
  * Note: Assuming log() return accurate answer, the following
- * 	 algorithm can be used to compute log1p(x) to within a few ULP:
+ *	 algorithm can be used to compute log1p(x) to within a few ULP:
  *
  *		u = 1+x;
  *		if(u==1.0) return x ; else
@@ -85,11 +81,7 @@ static char rcsid[] = "$NetBSD: s_log1p.c,v 1.8 1995/05/10 20:47:46 jtc Exp $";
 #include "math.h"
 #include "math_private.h"
 
-#ifdef __STDC__
 static const double
-#else
-static double
-#endif
 ln2_hi  =  6.93147180369123816490e-01,	/* 3fe62e42 fee00000 */
 ln2_lo  =  1.90821492927058770002e-10,	/* 3dea39ef 35793c76 */
 two54   =  1.80143985094819840000e+16,  /* 43500000 00000000 */
@@ -101,18 +93,10 @@ Lp[] = {0.0, 6.666666666666735130e-01,  /* 3FE55555 55555593 */
  1.531383769920937332e-01,  /* 3FC39A09 D078C69F */
  1.479819860511658591e-01};  /* 3FC2F112 DF3E5244 */
 
-#ifdef __STDC__
 static const double zero = 0.0;
-#else
-static double zero = 0.0;
-#endif
 
-#ifdef __STDC__
-	double __log1p(double x)
-#else
-	double __log1p(x)
-	double x;
-#endif
+double
+__log1p(double x)
 {
 	double hfsq,f,c,s,z,R,u,z2,z4,z6,R1,R2,R3,R4;
 	int32_t k,hx,hu,ax;
@@ -127,8 +111,8 @@ static double zero = 0.0;
 		else return (x-x)/(x-x);	/* log1p(x<-1)=NaN */
 	    }
 	    if(ax<0x3e200000) {			/* |x| < 2**-29 */
-		if(two54+x>zero			/* raise inexact */
-	            &&ax<0x3c900000) 		/* |x| < 2**-54 */
+		math_force_eval(two54+x);	/* raise inexact */
+		if (ax<0x3c900000)		/* |x| < 2**-54 */
 		    return x;
 		else
 		    return x - x*x*0.5;
@@ -141,22 +125,22 @@ static double zero = 0.0;
 	    if(hx<0x43400000) {
 		u  = 1.0+x;
 		GET_HIGH_WORD(hu,u);
-	        k  = (hu>>20)-1023;
-	        c  = (k>0)? 1.0-(u-x):x-(u-1.0);/* correction term */
+		k  = (hu>>20)-1023;
+		c  = (k>0)? 1.0-(u-x):x-(u-1.0);/* correction term */
 		c /= u;
 	    } else {
 		u  = x;
 		GET_HIGH_WORD(hu,u);
-	        k  = (hu>>20)-1023;
+		k  = (hu>>20)-1023;
 		c  = 0;
 	    }
 	    hu &= 0x000fffff;
 	    if(hu<0x6a09e) {
-	        SET_HIGH_WORD(u,hu|0x3ff00000);	/* normalize u */
+		SET_HIGH_WORD(u,hu|0x3ff00000);	/* normalize u */
 	    } else {
-	        k += 1;
+		k += 1;
 		SET_HIGH_WORD(u,hu|0x3fe00000);	/* normalize u/2 */
-	        hu = (0x00100000-hu)>>2;
+		hu = (0x00100000-hu)>>2;
 	    }
 	    f = u-1.0;
 	}
@@ -168,9 +152,9 @@ static double zero = 0.0;
 	    }
 	    R = hfsq*(1.0-0.66666666666666666*f);
 	    if(k==0) return f-R; else
-	    	     return k*ln2_hi-((R-(k*ln2_lo+c))-f);
+		     return k*ln2_hi-((R-(k*ln2_lo+c))-f);
 	}
- 	s = f/(2.0+f);
+	s = f/(2.0+f);
 	z = s*s;
 #ifdef DO_NOT_USE_THIS
 	R = z*(Lp1+z*(Lp2+z*(Lp3+z*(Lp4+z*(Lp5+z*(Lp6+z*Lp7))))));
diff --git a/sysdeps/ieee754/dbl-64/s_round.c b/sysdeps/ieee754/dbl-64/s_round.c
index 94fcde0e4c..f8a38163fc 100644
--- a/sysdeps/ieee754/dbl-64/s_round.c
+++ b/sysdeps/ieee754/dbl-64/s_round.c
@@ -1,5 +1,5 @@
 /* Round double to integer away from zero.
-   Copyright (C) 1997 Free Software Foundation, Inc.
+   Copyright (C) 1997, 2011 Free Software Foundation, Inc.
    This file is part of the GNU C Library.
    Contributed by Ulrich Drepper <drepper@cygnus.com>, 1997.
 
@@ -38,13 +38,12 @@ __round (double x)
     {
       if (j0 < 0)
 	{
-	  if (huge + x > 0.0)
-	    {
-	      i0 &= 0x80000000;
-	      if (j0 == -1)
-		i0 |= 0x3ff00000;
-	      i1 = 0;
-	    }
+	  math_force_eval (huge + x > 0.0);
+
+	  i0 &= 0x80000000;
+	  if (j0 == -1)
+	    i0 |= 0x3ff00000;
+	  i1 = 0;
 	}
       else
 	{
@@ -52,13 +51,12 @@ __round (double x)
 	  if (((i0 & i) | i1) == 0)
 	    /* X is integral.  */
 	    return x;
-	  if (huge + x > 0.0)
-	    {
-	      /* Raise inexact if x != 0.  */
-	      i0 += 0x00080000 >> j0;
-	      i0 &= ~i;
-	      i1 = 0;
-	    }
+	  math_force_eval (huge + x > 0.0);
+
+	  /* Raise inexact if x != 0.  */
+	  i0 += 0x00080000 >> j0;
+	  i0 &= ~i;
+	  i1 = 0;
 	}
     }
   else if (j0 > 51)
@@ -76,14 +74,13 @@ __round (double x)
 	/* X is integral.  */
 	return x;
 
-      if (huge + x > 0.0)
-	{
-	  /* Raise inexact if x != 0.  */
-	  u_int32_t j = i1 + (1 << (51 - j0));
-	  if (j < i1)
-	    i0 += 1;
-	  i1 = j;
-	}
+      math_force_eval (huge + x > 0.0);
+
+      /* Raise inexact if x != 0.  */
+      u_int32_t j = i1 + (1 << (51 - j0));
+      if (j < i1)
+	i0 += 1;
+      i1 = j;
       i1 &= ~i;
     }
 
diff --git a/sysdeps/ieee754/dbl-64/wordsize-64/s_ceil.c b/sysdeps/ieee754/dbl-64/wordsize-64/s_ceil.c
index e0e71558f8..346dab7995 100644
--- a/sysdeps/ieee754/dbl-64/wordsize-64/s_ceil.c
+++ b/sysdeps/ieee754/dbl-64/wordsize-64/s_ceil.c
@@ -32,18 +32,16 @@ __ceil(double x)
 	EXTRACT_WORDS64(i0,x);
 	j0 = ((i0>>52)&0x7ff)-0x3ff;
 	if(j0<=51) {
-	    if(j0<0) { 	/* raise inexact if x != 0 */
-		if(huge+x>0.0) {/* return 0*sign(x) if |x|<1 */
-		    if(i0<0) {i0=INT64_C(0x8000000000000000);}
-		    else if(i0!=0) { i0=INT64_C(0x3ff0000000000000);}
-		}
+	    if(j0<0) {	/* raise inexact if x != 0 */
+	      math_force_eval(huge+x);/* return 0*sign(x) if |x|<1 */
+	      if(i0<0) {i0=INT64_C(0x8000000000000000);}
+	      else if(i0!=0) { i0=INT64_C(0x3ff0000000000000);}
 	    } else {
 		i = INT64_C(0x000fffffffffffff)>>j0;
 		if((i0&i)==0) return x; /* x is integral */
-		if(huge+x>0.0) {	/* raise inexact flag */
-		    if(i0>0) i0 += UINT64_C(0x0010000000000000)>>j0;
-		    i0 &= (~i);
-		}
+		math_force_eval(huge+x);	/* raise inexact flag */
+		if(i0>0) i0 += UINT64_C(0x0010000000000000)>>j0;
+		i0 &= (~i);
 	    }
 	} else {
 	    if(j0==0x400) return x+x;	/* inf or NaN */
diff --git a/sysdeps/ieee754/dbl-64/wordsize-64/s_floor.c b/sysdeps/ieee754/dbl-64/wordsize-64/s_floor.c
index 8b7300bb93..5df4ab52fa 100644
--- a/sysdeps/ieee754/dbl-64/wordsize-64/s_floor.c
+++ b/sysdeps/ieee754/dbl-64/wordsize-64/s_floor.c
@@ -54,18 +54,16 @@ __floor (double x)
 	int32_t j0 = ((i0>>52)&0x7ff)-0x3ff;
 	if(__builtin_expect(j0<52, 1)) {
 	    if(j0<0) {	/* raise inexact if x != 0 */
-		if(huge+x>0.0) {/* return 0*sign(x) if |x|<1 */
-		    if(i0>=0) {i0=0;}
-		    else if((i0&0x7fffffffffffffffl)!=0)
-			{ i0=0xbff0000000000000l;}
-		}
+		math_force_eval(huge+x);/* return 0*sign(x) if |x|<1 */
+		if(i0>=0) {i0=0;}
+		else if((i0&0x7fffffffffffffffl)!=0)
+		  { i0=0xbff0000000000000l;}
 	    } else {
 		uint64_t i = (0x000fffffffffffffl)>>j0;
 		if((i0&i)==0) return x; /* x is integral */
-		if(huge+x>0.0) {	/* raise inexact flag */
-		    if(i0<0) i0 += (0x0010000000000000l)>>j0;
-		    i0 &= (~i);
-		}
+		math_force_eval(huge+x);	/* raise inexact flag */
+		if(i0<0) i0 += (0x0010000000000000l)>>j0;
+		i0 &= (~i);
 	    }
 	    INSERT_WORDS64(x,i0);
 	} else if (j0==0x400)
diff --git a/sysdeps/ieee754/dbl-64/wordsize-64/s_round.c b/sysdeps/ieee754/dbl-64/wordsize-64/s_round.c
index 5bd857910c..25ff859283 100644
--- a/sysdeps/ieee754/dbl-64/wordsize-64/s_round.c
+++ b/sysdeps/ieee754/dbl-64/wordsize-64/s_round.c
@@ -1,5 +1,5 @@
 /* Round double to integer away from zero.
-   Copyright (C) 1997, 2009 Free Software Foundation, Inc.
+   Copyright (C) 1997, 2009, 2011 Free Software Foundation, Inc.
    This file is part of the GNU C Library.
    Contributed by Ulrich Drepper <drepper@cygnus.com>, 1997.
 
@@ -37,12 +37,11 @@ __round (double x)
     {
       if (j0 < 0)
 	{
-	  if (huge + x > 0.0)
-	    {
-	      i0 &= UINT64_C(0x8000000000000000);
-	      if (j0 == -1)
-		i0 |= UINT64_C(0x3ff0000000000000);
-	    }
+	  math_force_eval (huge + x);
+
+	  i0 &= UINT64_C(0x8000000000000000);
+	  if (j0 == -1)
+	    i0 |= UINT64_C(0x3ff0000000000000);
 	}
       else
 	{
@@ -50,12 +49,11 @@ __round (double x)
 	  if ((i0 & i) == 0)
 	    /* X is integral.  */
 	    return x;
-	  if (huge + x > 0.0)
-	    {
-	      /* Raise inexact if x != 0.  */
-	      i0 += UINT64_C(0x0008000000000000) >> j0;
-	      i0 &= ~i;
-	    }
+	  math_force_eval (huge + x);
+
+	  /* Raise inexact if x != 0.  */
+	  i0 += UINT64_C(0x0008000000000000) >> j0;
+	  i0 &= ~i;
 	}
     }
   else
diff --git a/sysdeps/ieee754/flt-32/e_atanhf.c b/sysdeps/ieee754/flt-32/e_atanhf.c
index ddd18ab300..d98a11ed67 100644
--- a/sysdeps/ieee754/flt-32/e_atanhf.c
+++ b/sysdeps/ieee754/flt-32/e_atanhf.c
@@ -49,8 +49,11 @@ __ieee754_atanhf (float x)
   float t;
   if (xa < 0.5f)
     {
-      if (__builtin_expect (xa < 0x1.0p-28f, 0) && (huge + x) > 0.0f)
-	return x;
+      if (__builtin_expect (xa < 0x1.0p-28f, 0))
+	{
+	  math_force_eval (huge + x);
+	  return x;
+	}
 
       t = xa + xa;
       t = 0.5f * __log1pf (t + t * xa / (1.0f - xa));
diff --git a/sysdeps/ieee754/flt-32/e_j0f.c b/sysdeps/ieee754/flt-32/e_j0f.c
index d2da43f929..181c2e46d4 100644
--- a/sysdeps/ieee754/flt-32/e_j0f.c
+++ b/sysdeps/ieee754/flt-32/e_j0f.c
@@ -66,10 +66,9 @@ __ieee754_j0f(float x)
 		return z;
 	}
 	if(ix<0x39000000) {	/* |x| < 2**-13 */
-	    if(huge+x>one) {	/* raise inexact if x != 0 */
-		if(ix<0x32000000) return one;	/* |x|<2**-27 */
-		else	      return one - (float)0.25*x*x;
-	    }
+	    math_force_eval(huge+x>one);	/* raise inexact if x != 0 */
+	    if(ix<0x32000000) return one;	/* |x|<2**-27 */
+	    else	      return one - (float)0.25*x*x;
 	}
 	z = x*x;
 	r =  z*(R02+z*(R03+z*(R04+z*R05)));
diff --git a/sysdeps/ieee754/flt-32/s_ceilf.c b/sysdeps/ieee754/flt-32/s_ceilf.c
index 8a83201c15..af926600b0 100644
--- a/sysdeps/ieee754/flt-32/s_ceilf.c
+++ b/sysdeps/ieee754/flt-32/s_ceilf.c
@@ -29,17 +29,15 @@ __ceilf(float x)
 	j0 = ((i0>>23)&0xff)-0x7f;
 	if(j0<23) {
 	    if(j0<0) {	/* raise inexact if x != 0 */
-		if(huge+x>(float)0.0) {/* return 0*sign(x) if |x|<1 */
-		    if(i0<0) {i0=0x80000000;}
-		    else if(i0!=0) { i0=0x3f800000;}
-		}
+		math_force_eval(huge+x);/* return 0*sign(x) if |x|<1 */
+		if(i0<0) {i0=0x80000000;}
+		else if(i0!=0) { i0=0x3f800000;}
 	    } else {
 		i = (0x007fffff)>>j0;
 		if((i0&i)==0) return x; /* x is integral */
-		if(huge+x>(float)0.0) {	/* raise inexact flag */
-		    if(i0>0) i0 += (0x00800000)>>j0;
-		    i0 &= (~i);
-		}
+		math_force_eval(huge+x);	/* raise inexact flag */
+		if(i0>0) i0 += (0x00800000)>>j0;
+		i0 &= (~i);
 	    }
 	} else {
 	    if(__builtin_expect(j0==0x80, 0)) return x+x; /* inf or NaN */
diff --git a/sysdeps/ieee754/flt-32/s_expm1f.c b/sysdeps/ieee754/flt-32/s_expm1f.c
index 3f4536b906..1d707120b0 100644
--- a/sysdeps/ieee754/flt-32/s_expm1f.c
+++ b/sysdeps/ieee754/flt-32/s_expm1f.c
@@ -13,22 +13,14 @@
  * ====================================================
  */
 
-#if defined(LIBM_SCCS) && !defined(lint)
-static char rcsid[] = "$NetBSD: s_expm1f.c,v 1.5 1995/05/10 20:47:11 jtc Exp $";
-#endif
-
 #include <errno.h>
 #include "math.h"
 #include "math_private.h"
 
-static const volatile float huge = 1.0e+30;
-static const volatile float tiny = 1.0e-30;
+static const float huge = 1.0e+30;
+static const float tiny = 1.0e-30;
 
-#ifdef __STDC__
 static const float
-#else
-static float
-#endif
 one		= 1.0,
 o_threshold	= 8.8721679688e+01,/* 0x42b17180 */
 ln2_hi		= 6.9313812256e-01,/* 0x3f317180 */
@@ -41,12 +33,8 @@ Q3  =  -7.9365076090e-05, /* 0xb8a670cd */
 Q4  =   4.0082177293e-06, /* 0x36867e54 */
 Q5  =  -2.0109921195e-07; /* 0xb457edbb */
 
-#ifdef __STDC__
-	float __expm1f(float x)
-#else
-	float __expm1f(x)
-	float x;
-#endif
+float
+__expm1f(float x)
 {
 	float y,hi,lo,c,t,e,hxs,hfx,r1;
 	int32_t k,xsb;
@@ -60,17 +48,17 @@ Q5  =  -2.0109921195e-07; /* 0xb457edbb */
     /* filter out huge and non-finite argument */
 	if(hx >= 0x4195b844) {			/* if |x|>=27*ln2 */
 	    if(hx >= 0x42b17218) {		/* if |x|>=88.721... */
-                if(hx>0x7f800000)
-		    return x+x; 	 /* NaN */
+		if(hx>0x7f800000)
+		    return x+x;		 /* NaN */
 		if(hx==0x7f800000)
 		    return (xsb==0)? x:-1.0;/* exp(+-inf)={inf,-1} */
-	        if(x > o_threshold) {
+		if(x > o_threshold) {
 		  __set_errno (ERANGE);
 		  return huge*huge; /* overflow */
 		}
 	    }
 	    if(xsb!=0) { /* x < -27*ln2, return -1.0 with inexact */
-		if(x+tiny<(float)0.0)	/* raise inexact */
+		math_force_eval(x+tiny);/* raise inexact */
 		return tiny-one;	/* return -1 */
 	    }
 	}
@@ -91,7 +79,7 @@ Q5  =  -2.0109921195e-07; /* 0xb457edbb */
 	    x  = hi - lo;
 	    c  = (hi-x)-lo;
 	}
-	else if(hx < 0x33000000) {  	/* when |x|<2**-25, return x */
+	else if(hx < 0x33000000) {	/* when |x|<2**-25, return x */
 	    t = huge+x;	/* return x with inexact flags when x!=0 */
 	    return x - (t-(huge+x));
 	}
@@ -109,28 +97,28 @@ Q5  =  -2.0109921195e-07; /* 0xb457edbb */
 	    e -= hxs;
 	    if(k== -1) return (float)0.5*(x-e)-(float)0.5;
 	    if(k==1) {
-	       	if(x < (float)-0.25) return -(float)2.0*(e-(x+(float)0.5));
-	       	else 	      return  one+(float)2.0*(x-e);
+		if(x < (float)-0.25) return -(float)2.0*(e-(x+(float)0.5));
+		else	      return  one+(float)2.0*(x-e);
 	    }
 	    if (k <= -2 || k>56) {   /* suffice to return exp(x)-1 */
-	        int32_t i;
-	        y = one-(e-x);
+		int32_t i;
+		y = one-(e-x);
 		GET_FLOAT_WORD(i,y);
 		SET_FLOAT_WORD(y,i+(k<<23));	/* add k to y's exponent */
-	        return y-one;
+		return y-one;
 	    }
 	    t = one;
 	    if(k<23) {
-	        int32_t i;
-	        SET_FLOAT_WORD(t,0x3f800000 - (0x1000000>>k)); /* t=1-2^-k */
-	       	y = t-(e-x);
+		int32_t i;
+		SET_FLOAT_WORD(t,0x3f800000 - (0x1000000>>k)); /* t=1-2^-k */
+		y = t-(e-x);
 		GET_FLOAT_WORD(i,y);
 		SET_FLOAT_WORD(y,i+(k<<23));	/* add k to y's exponent */
 	   } else {
-	        int32_t i;
+		int32_t i;
 		SET_FLOAT_WORD(t,((0x7f-k)<<23));	/* 2^-k */
-	       	y = x-(e+t);
-	       	y += one;
+		y = x-(e+t);
+		y += one;
 		GET_FLOAT_WORD(i,y);
 		SET_FLOAT_WORD(y,i+(k<<23));	/* add k to y's exponent */
 	    }
diff --git a/sysdeps/ieee754/flt-32/s_floorf.c b/sysdeps/ieee754/flt-32/s_floorf.c
index dd19c6bc56..de160d2114 100644
--- a/sysdeps/ieee754/flt-32/s_floorf.c
+++ b/sysdeps/ieee754/flt-32/s_floorf.c
@@ -36,18 +36,16 @@ __floorf(float x)
 	j0 = ((i0>>23)&0xff)-0x7f;
 	if(j0<23) {
 	    if(j0<0) {	/* raise inexact if x != 0 */
-		if(huge+x>(float)0.0) {/* return 0*sign(x) if |x|<1 */
-		    if(i0>=0) {i0=0;}
-		    else if((i0&0x7fffffff)!=0)
-			{ i0=0xbf800000;}
-		}
+		math_force_eval(huge+x);/* return 0*sign(x) if |x|<1 */
+		if(i0>=0) {i0=0;}
+		else if((i0&0x7fffffff)!=0)
+		  { i0=0xbf800000;}
 	    } else {
 		i = (0x007fffff)>>j0;
 		if((i0&i)==0) return x; /* x is integral */
-		if(huge+x>(float)0.0) {	/* raise inexact flag */
-		    if(i0<0) i0 += (0x00800000)>>j0;
-		    i0 &= (~i);
-		}
+		math_force_eval(huge+x);	/* raise inexact flag */
+		if(i0<0) i0 += (0x00800000)>>j0;
+		i0 &= (~i);
 	    }
 	} else {
 	    if(__builtin_expect(j0==0x80, 0)) return x+x; /* inf or NaN */
diff --git a/sysdeps/ieee754/flt-32/s_log1pf.c b/sysdeps/ieee754/flt-32/s_log1pf.c
index bd3d57635c..9e555ed570 100644
--- a/sysdeps/ieee754/flt-32/s_log1pf.c
+++ b/sysdeps/ieee754/flt-32/s_log1pf.c
@@ -13,18 +13,10 @@
  * ====================================================
  */
 
-#if defined(LIBM_SCCS) && !defined(lint)
-static char rcsid[] = "$NetBSD: s_log1pf.c,v 1.4 1995/05/10 20:47:48 jtc Exp $";
-#endif
-
 #include "math.h"
 #include "math_private.h"
 
-#ifdef __STDC__
 static const float
-#else
-static float
-#endif
 ln2_hi =   6.9313812256e-01,	/* 0x3f317180 */
 ln2_lo =   9.0580006145e-06,	/* 0x3717f7d1 */
 two25 =    3.355443200e+07,	/* 0x4c000000 */
@@ -36,18 +28,10 @@ Lp5 = 1.8183572590e-01, /* 3E3A3325 */
 Lp6 = 1.5313838422e-01, /* 3E1CD04F */
 Lp7 = 1.4798198640e-01; /* 3E178897 */
 
-#ifdef __STDC__
 static const float zero = 0.0;
-#else
-static float zero = 0.0;
-#endif
 
-#ifdef __STDC__
-	float __log1pf(float x)
-#else
-	float __log1pf(x)
-	float x;
-#endif
+float
+__log1pf(float x)
 {
 	float hfsq,f,c,s,z,R,u;
 	int32_t k,hx,hu,ax;
@@ -62,8 +46,8 @@ static float zero = 0.0;
 		else return (x-x)/(x-x);	/* log1p(x<-1)=NaN */
 	    }
 	    if(ax<0x31000000) {			/* |x| < 2**-29 */
-		if(two25+x>zero			/* raise inexact */
-	            &&ax<0x24800000) 		/* |x| < 2**-54 */
+		math_force_eval(two25+x);	/* raise inexact */
+		if (ax<0x24800000)		/* |x| < 2**-54 */
 		    return x;
 		else
 		    return x - x*x*(float)0.5;
@@ -76,37 +60,37 @@ static float zero = 0.0;
 	    if(hx<0x5a000000) {
 		u  = (float)1.0+x;
 		GET_FLOAT_WORD(hu,u);
-	        k  = (hu>>23)-127;
+		k  = (hu>>23)-127;
 		/* correction term */
-	        c  = (k>0)? (float)1.0-(u-x):x-(u-(float)1.0);
+		c  = (k>0)? (float)1.0-(u-x):x-(u-(float)1.0);
 		c /= u;
 	    } else {
 		u  = x;
 		GET_FLOAT_WORD(hu,u);
-	        k  = (hu>>23)-127;
+		k  = (hu>>23)-127;
 		c  = 0;
 	    }
 	    hu &= 0x007fffff;
 	    if(hu<0x3504f7) {
-	        SET_FLOAT_WORD(u,hu|0x3f800000);/* normalize u */
+		SET_FLOAT_WORD(u,hu|0x3f800000);/* normalize u */
 	    } else {
-	        k += 1;
+		k += 1;
 		SET_FLOAT_WORD(u,hu|0x3f000000);	/* normalize u/2 */
-	        hu = (0x00800000-hu)>>2;
+		hu = (0x00800000-hu)>>2;
 	    }
 	    f = u-(float)1.0;
 	}
 	hfsq=(float)0.5*f*f;
 	if(hu==0) {	/* |f| < 2**-20 */
 	    if(f==zero) {
-	    	if(k==0) return zero;
+		if(k==0) return zero;
 		else {c += k*ln2_lo; return k*ln2_hi+c;}
 	    }
 	    R = hfsq*((float)1.0-(float)0.66666666666666666*f);
 	    if(k==0) return f-R; else
-	    	     return k*ln2_hi-((R-(k*ln2_lo+c))-f);
+		     return k*ln2_hi-((R-(k*ln2_lo+c))-f);
 	}
- 	s = f/((float)2.0+f);
+	s = f/((float)2.0+f);
 	z = s*s;
 	R = z*(Lp1+z*(Lp2+z*(Lp3+z*(Lp4+z*(Lp5+z*(Lp6+z*Lp7))))));
 	if(k==0) return f-(hfsq-s*(hfsq+R)); else
diff --git a/sysdeps/ieee754/flt-32/s_roundf.c b/sysdeps/ieee754/flt-32/s_roundf.c
index 0b24987792..09b38cdc2a 100644
--- a/sysdeps/ieee754/flt-32/s_roundf.c
+++ b/sysdeps/ieee754/flt-32/s_roundf.c
@@ -1,5 +1,5 @@
 /* Round float to integer away from zero.
-   Copyright (C) 1997 Free Software Foundation, Inc.
+   Copyright (C) 1997, 2011 Free Software Foundation, Inc.
    This file is part of the GNU C Library.
    Contributed by Ulrich Drepper <drepper@cygnus.com>, 1997.
 
@@ -37,12 +37,11 @@ __roundf (float x)
     {
       if (j0 < 0)
 	{
-	  if (huge + x > 0.0F)
-	    {
-	      i0 &= 0x80000000;
-	      if (j0 == -1)
-		i0 |= 0x3f800000;
-	    }
+	  math_force_eval (huge + x > 0.0F);
+
+	  i0 &= 0x80000000;
+	  if (j0 == -1)
+	    i0 |= 0x3f800000;
 	}
       else
 	{
@@ -50,12 +49,11 @@ __roundf (float x)
 	  if ((i0 & i) == 0)
 	    /* X is integral.  */
 	    return x;
-	  if (huge + x > 0.0F)
-	    {
-	      /* Raise inexact if x != 0.  */
-	      i0 += 0x00400000 >> j0;
-	      i0 &= ~i;
-	    }
+	  math_force_eval (huge + x > 0.0F);
+
+	  /* Raise inexact if x != 0.  */
+	  i0 += 0x00400000 >> j0;
+	  i0 &= ~i;
 	}
     }
   else
diff --git a/sysdeps/ieee754/ldbl-96/e_atanhl.c b/sysdeps/ieee754/ldbl-96/e_atanhl.c
index 5a2aebef3e..0f3c7fb596 100644
--- a/sysdeps/ieee754/ldbl-96/e_atanhl.c
+++ b/sysdeps/ieee754/ldbl-96/e_atanhl.c
@@ -52,7 +52,10 @@ __ieee754_atanhl(long double x)
 	    return (x-x)/(x-x);
 	if(ix==0x3fff)
 	    return x/zero;
-	if(ix<0x3fe3&&(huge+x)>zero) return x;	/* x<2**-28 */
+	if(ix<0x3fe3) {
+	    math_force_eval(huge+x);
+	    return x;	/* x<2**-28 */
+	}
 	SET_LDOUBLE_EXP(x,ix);
 	if(ix<0x3ffe) {		/* x < 0.5 */
 	    t = x+x;
diff --git a/sysdeps/ieee754/ldbl-96/e_j0l.c b/sysdeps/ieee754/ldbl-96/e_j0l.c
index ce1f0f7563..abf4f109f8 100644
--- a/sysdeps/ieee754/ldbl-96/e_j0l.c
+++ b/sysdeps/ieee754/ldbl-96/e_j0l.c
@@ -144,13 +144,12 @@ __ieee754_j0l (long double x)
     }
   if (__builtin_expect (ix < 0x3fef, 0)) /* |x| < 2**-16 */
     {
-      if (huge + x > one)
-	{			/* raise inexact if x != 0 */
-	  if (ix < 0x3fde) /* |x| < 2^-33 */
-	    return one;
-	  else
-	    return one - 0.25 * x * x;
-	}
+      /* raise inexact if x != 0 */
+      math_force_eval (huge + x);
+      if (ix < 0x3fde) /* |x| < 2^-33 */
+	return one;
+      else
+	return one - 0.25 * x * x;
     }
   z = x * x;
   r = z * (R[0] + z * (R[1] + z * (R[2] + z * (R[3] + z * R[4]))));
diff --git a/sysdeps/ieee754/ldbl-96/s_roundl.c b/sysdeps/ieee754/ldbl-96/s_roundl.c
index f1399cc209..833ae0d786 100644
--- a/sysdeps/ieee754/ldbl-96/s_roundl.c
+++ b/sysdeps/ieee754/ldbl-96/s_roundl.c
@@ -1,5 +1,5 @@
 /* Round long double to integer away from zero.
-   Copyright (C) 1997, 2007 Free Software Foundation, Inc.
+   Copyright (C) 1997, 2007, 2011 Free Software Foundation, Inc.
    This file is part of the GNU C Library.
    Contributed by Ulrich Drepper <drepper@cygnus.com>, 1997.
 
@@ -38,15 +38,13 @@ __roundl (long double x)
     {
       if (j0 < 0)
 	{
-	  if (huge + x > 0.0)
+	  math_force_eval (huge + x);
+	  se &= 0x8000;
+	  i0 = i1 = 0;
+	  if (j0 == -1)
 	    {
-	      se &= 0x8000;
-	      i0 = i1 = 0;
-	      if (j0 == -1)
-		{
-		  se |= 0x3fff;
-		  i0 = 0x80000000;
-		}
+	      se |= 0x3fff;
+	      i0 = 0x80000000;
 	    }
 	}
       else
@@ -55,15 +53,14 @@ __roundl (long double x)
 	  if (((i0 & i) | i1) == 0)
 	    /* X is integral.  */
 	    return x;
-	  if (huge + x > 0.0)
-	    {
-	      /* Raise inexact if x != 0.  */
-	      u_int32_t j = i0 + (0x40000000 >> j0);
-	      if (j < i0)
-		se += 1;
-	      i0 = (j & ~i) | 0x80000000;
-	      i1 = 0;
-	    }
+
+	  /* Raise inexact if x != 0.  */
+	  math_force_eval (huge + x);
+	  u_int32_t j = i0 + (0x40000000 >> j0);
+	  if (j < i0)
+	    se += 1;
+	  i0 = (j & ~i) | 0x80000000;
+	  i1 = 0;
 	}
     }
   else if (j0 > 62)
@@ -81,22 +78,20 @@ __roundl (long double x)
 	/* X is integral.  */
 	return x;
 
-      if (huge + x > 0.0)
+      math_force_eval (huge + x);
+      /* Raise inexact if x != 0.  */
+      u_int32_t j = i1 + (1 << (62 - j0));
+      if (j < i1)
 	{
-	  /* Raise inexact if x != 0.  */
-	  u_int32_t j = i1 + (1 << (62 - j0));
-	  if (j < i1)
+	  u_int32_t k = i0 + 1;
+	  if (k < i0)
 	    {
-	      u_int32_t k = i0 + 1;
-	      if (k < i0)
-		{
-		  se += 1;
-		  k |= 0x80000000;
-		}
-	      i0 = k;
+	      se += 1;
+	      k |= 0x80000000;
 	    }
-	  i1 = j;
+	  i0 = k;
 	}
+      i1 = j;
       i1 &= ~i;
     }