Patchwork Improves __ieee754_exp() performance by greater than 5x on sparc/x86.

login
register
mail settings
Submitter Patrick McGehearty
Date Oct. 26, 2017, 4:44 p.m.
Message ID <1509036263-113745-1-git-send-email-patrick.mcgehearty@oracle.com>
Download mbox | patch
Permalink /patch/23856/
State New
Headers show

Comments

Patrick McGehearty - Oct. 26, 2017, 4:44 p.m.
Version 2 of proposed patch.
Revised copyright notice and formatting issues.
Removed slowexp.c and related references.
Replaced tables of double float constants with hex constants, taking special
  attention to correctly handle little endian and big endian versions.
  Using hex initialization also required changing variables to be declared
  as unions.  Tables moved from e_exp.c to sysdeps/ieee754/dbl-64/eexp.tbl.
Replaced __fegetround(), __fesetround() with get_rounding_mode and
  libc_fesetround().
Removed use of "small". "inexact mode" now ignored.
Retested and rebenchmarked on sparc and x86 with the above changes.

These changes will be active for all platforms that don't provide
their own exp() routines. They will also be active for ieee754
versions of ccos, ccosh, cosh, csin, csinh, sinh, exp10, gamma, and
erf.

Typical performance gains is typically around 5x when measured on
Sparc s7 for common values between exp(1) and exp(40).

Using the glibc perf tests on sparc,
      sparc (nsec)    x86 (nsec)
      old     new     old     new
max   17629   381    5173     766
min     399    54      15      13
mean   5317   199    1349      24

The extreme max times for the old (ieee754) exp are due to the
multiprecision computation in the old algorithm when the true value is
very near 0.5 ulp away from an value representable in double
precision. The new algorithm does not take special measures for those
cases. The current glibc exp perf tests overrepresent those values.
Informal testing suggests approximately one in 200 cases might
invoke the high cost computation. The performance advantage of the new
algorithm for other values is still large but not as large as indicated
by the chart above.

Glibc correctness tests for exp() and expf() were run. Within the
test suite 3 input values were found to cause 1 bit differences (ulp)
when "FE_TONEAREST" rounding mode is set. No differences in exp() were
seen for the tested values for the other rounding modes.
Typical example:
exp(-0x1.760cd2p+0)  (-1.46113312244415283203125)
 new code:    2.31973271630014299393707e-01   0x1.db14cd799387ap-3
 old code:    2.31973271630014271638132e-01   0x1.db14cd7993879p-3
    exp    =  2.31973271630014285508337 (high precision)
Old delta: off by 0.49 ulp
New delta: off by 0.51 ulp

In addition, because ieee754_exp() is used by other routines, cexp()
showed test results with very small imaginary input values where the
imaginary portion of the result was off by 3 ulp when in upward
rounding mode, but not in the other rounding modes.  For x86, tgamma
showed a few values where the ulp increased to 6 (max ulp for tgamma
is 5). Sparc tgamma did not show these failures.  I presume the tgamma
differences are due to compiler optimization differences within the
gamma function. The gamma function is known to be difficult to compute
accurately.
---
 manual/probes.texi                          |   14 -
 math/Makefile                               |    2 +-
 sysdeps/generic/math_private.h              |    1 -
 sysdeps/ieee754/dbl-64/e_exp.c              |  379 +++++++++++++-----------
 sysdeps/ieee754/dbl-64/e_pow.c              |    2 +-
 sysdeps/ieee754/dbl-64/eexp.tbl             |  440 +++++++++++++++++++++++++++
 sysdeps/ieee754/dbl-64/slowexp.c            |   86 ------
 sysdeps/powerpc/power4/fpu/Makefile         |    1 -
 sysdeps/x86_64/fpu/multiarch/Makefile       |    9 +-
 sysdeps/x86_64/fpu/multiarch/e_exp-avx.c    |    1 -
 sysdeps/x86_64/fpu/multiarch/e_exp-fma.c    |    1 -
 sysdeps/x86_64/fpu/multiarch/e_exp-fma4.c   |    1 -
 sysdeps/x86_64/fpu/multiarch/slowexp-avx.c  |    9 -
 sysdeps/x86_64/fpu/multiarch/slowexp-fma.c  |    9 -
 sysdeps/x86_64/fpu/multiarch/slowexp-fma4.c |    9 -
 15 files changed, 651 insertions(+), 313 deletions(-)
 create mode 100644 sysdeps/ieee754/dbl-64/eexp.tbl
 delete mode 100644 sysdeps/ieee754/dbl-64/slowexp.c
 delete mode 100644 sysdeps/x86_64/fpu/multiarch/slowexp-avx.c
 delete mode 100644 sysdeps/x86_64/fpu/multiarch/slowexp-fma.c
 delete mode 100644 sysdeps/x86_64/fpu/multiarch/slowexp-fma4.c
Joseph Myers - Oct. 26, 2017, 5:19 p.m.
On Thu, 26 Oct 2017, Patrick McGehearty wrote:

> Replaced tables of double float constants with hex constants, taking special
>   attention to correctly handle little endian and big endian versions.
>   Using hex initialization also required changing variables to be declared
>   as unions.  Tables moved from e_exp.c to sysdeps/ieee754/dbl-64/eexp.tbl.

There should be no endian-dependent constants or tables of constants.  
See my comments in the commit message for commit 
60f435bb0c097ead2d4609aa7e45a203eb24e43c where I cleaned up some such 
existing endian-dependent definitions.

Unless a particular constant, table etc. is needed in the code both as 
integers and as double, just define it as double and initialize with a C99 
hex float constant, without involving unions at all.  This certainly 
applies to some of your constants, possibly all of them.

If both the double and int parts of a union are actually referenced (and 
while the code certainly references both parts for *variables*, it seems 
less likely the integer parts are of use for *constants*), use C99 
designated initializers to initialize the double part of the union, again 
using a C99 hex float constant.
Joseph Myers - Oct. 26, 2017, 5:25 p.m.
On Thu, 26 Oct 2017, Joseph Myers wrote:

> Unless a particular constant, table etc. is needed in the code both as 
> integers and as double, just define it as double and initialize with a C99 
> hex float constant, without involving unions at all.  This certainly 
> applies to some of your constants, possibly all of them.

To be clear: all my past and present comments about hex floats always mean 
C99 0x1.2p3 and similar constants.  Never hex integer values with a union 
as in this patch.  You should never, anywhere in glibc, have any occasion 
to initialize a floating-point constant via specifying the integer values 
of its representation (except in testcases for special ldbl-96 and 
ldbl-128ibm representations).  Proper hex floating-point constants are 
always better.
Patrick McGehearty - Oct. 26, 2017, 6:29 p.m.
On 10/26/2017 12:25 PM, Joseph Myers wrote:
> On Thu, 26 Oct 2017, Joseph Myers wrote:
>
>> Unless a particular constant, table etc. is needed in the code both as
>> integers and as double, just define it as double and initialize with a C99
>> hex float constant, without involving unions at all.  This certainly
>> applies to some of your constants, possibly all of them.
> To be clear: all my past and present comments about hex floats always mean
> C99 0x1.2p3 and similar constants.  Never hex integer values with a union
> as in this patch.  You should never, anywhere in glibc, have any occasion
> to initialize a floating-point constant via specifying the integer values
> of its representation (except in testcases for special ldbl-96 and
> ldbl-128ibm representations).  Proper hex floating-point constants are
> always better.
>
I was following the hex pattern used in sysdeps/ieee754/dbl-64/uexp.tbl

To be sure I'm understanding your comment correctly, you are
recommending I change from the union form of the hex constants
to 0x1.23p3 form of the constants and resubmit the patch.
That would reduce the chance of errors in any future updates
of constant values.
Is that correct?

- patrick
Joseph Myers - Oct. 26, 2017, 7:44 p.m.
On Thu, 26 Oct 2017, Patrick McGehearty wrote:

> On 10/26/2017 12:25 PM, Joseph Myers wrote:
> > On Thu, 26 Oct 2017, Joseph Myers wrote:
> > 
> > > Unless a particular constant, table etc. is needed in the code both as
> > > integers and as double, just define it as double and initialize with a C99
> > > hex float constant, without involving unions at all.  This certainly
> > > applies to some of your constants, possibly all of them.
> > To be clear: all my past and present comments about hex floats always mean
> > C99 0x1.2p3 and similar constants.  Never hex integer values with a union
> > as in this patch.  You should never, anywhere in glibc, have any occasion
> > to initialize a floating-point constant via specifying the integer values
> > of its representation (except in testcases for special ldbl-96 and
> > ldbl-128ibm representations).  Proper hex floating-point constants are
> > always better.
> > 
> I was following the hex pattern used in sysdeps/ieee754/dbl-64/uexp.tbl

That's an obsolescent pattern, not to be used in new code; it just so 
happens that file hasn't yet been cleaned up to define double constants 
directly with C99 hex floats.

> To be sure I'm understanding your comment correctly, you are
> recommending I change from the union form of the hex constants
> to 0x1.23p3 form of the constants and resubmit the patch.

Yes.  For anything intending a particular, pre-computed floating-point 
value to be used, represent that value as a C99 hex float constant as the 
preferred way in new code of making the intended constant unambiguous.

Patch

diff --git a/manual/probes.texi b/manual/probes.texi
index 8ab6756..f8ae64b 100644
--- a/manual/probes.texi
+++ b/manual/probes.texi
@@ -258,20 +258,6 @@  Unless explicitly mentioned otherwise, a precision of 1 implies 24 bits of
 precision in the mantissa of the multiple precision number.  Hence, a precision
 level of 32 implies 768 bits of precision in the mantissa.
 
-@deftp Probe slowexp_p6 (double @var{$arg1}, double @var{$arg2})
-This probe is triggered when the @code{exp} function is called with an
-input that results in multiple precision computation with precision
-6.  Argument @var{$arg1} is the input value and @var{$arg2} is the
-computed output.
-@end deftp
-
-@deftp Probe slowexp_p32 (double @var{$arg1}, double @var{$arg2})
-This probe is triggered when the @code{exp} function is called with an
-input that results in multiple precision computation with precision
-32.  Argument @var{$arg1} is the input value and @var{$arg2} is the
-computed output.
-@end deftp
-
 @deftp Probe slowpow_p10 (double @var{$arg1}, double @var{$arg2}, double @var{$arg3}, double @var{$arg4})
 This probe is triggered when the @code{pow} function is called with
 inputs that result in multiple precision computation with precision
diff --git a/math/Makefile b/math/Makefile
index 1feb425..f70aebf 100644
--- a/math/Makefile
+++ b/math/Makefile
@@ -114,7 +114,7 @@  type-ldouble-yes := ldouble
 # double support
 type-double-suffix :=
 type-double-routines := branred doasin dosincos halfulp mpa mpatan2	\
-		       mpatan mpexp mplog mpsqrt mptan sincos32 slowexp	\
+		       mpatan mpexp mplog mpsqrt mptan sincos32 \
 		       slowpow sincostab k_rem_pio2
 
 # float support
diff --git a/sysdeps/generic/math_private.h b/sysdeps/generic/math_private.h
index 80c7c92..30fc3c9 100644
--- a/sysdeps/generic/math_private.h
+++ b/sysdeps/generic/math_private.h
@@ -262,7 +262,6 @@  extern double __sin32 (double __x, double __res, double __res1);
 extern double __cos32 (double __x, double __res, double __res1);
 extern double __mpsin (double __x, double __dx, bool __range_reduce);
 extern double __mpcos (double __x, double __dx, bool __range_reduce);
-extern double __slowexp (double __x);
 extern double __slowpow (double __x, double __y, double __z);
 extern void __docos (double __x, double __dx, double __v[]);
 
diff --git a/sysdeps/ieee754/dbl-64/e_exp.c b/sysdeps/ieee754/dbl-64/e_exp.c
index 6757a14..0b0e0e3 100644
--- a/sysdeps/ieee754/dbl-64/e_exp.c
+++ b/sysdeps/ieee754/dbl-64/e_exp.c
@@ -1,3 +1,4 @@ 
+/* EXP function - Compute double precision exponential */
 /*
  * IBM Accurate Mathematical Library
  * written by International Business Machines Corp.
@@ -23,7 +24,7 @@ 
 /*           exp1                                                          */
 /*                                                                         */
 /* FILES NEEDED:dla.h endian.h mpa.h mydefs.h uexp.h                       */
-/*              mpa.c mpexp.x slowexp.c                                    */
+/*              mpa.c mpexp.x                                              */
 /*                                                                         */
 /* An ultimate exp routine. Given an IEEE double machine number x          */
 /* it computes the correctly rounded (to nearest) value of e^x             */
@@ -32,207 +33,239 @@ 
 /*                                                                         */
 /***************************************************************************/
 
+/*  IBM exp(x) replaced by following exp(x) in 2017. IBM exp1(x,xx) remains. */
+/*
+   exp(x)
+   Hybrid algorithm of Peter Tang's Table driven method (for large
+   arguments) and an accurate table (for small arguments).
+   Written by K.C. Ng, November 1988.
+   Method (large arguments):
+	1. Argument Reduction: given the input x, find r and integer k
+	   and j such that
+	             x = (k+j/32)*(ln2) + r,  |r| <= (1/64)*ln2
+
+	2. exp(x) = 2^k * (2^(j/32) + 2^(j/32)*expm1(r))
+	   a. expm1(r) is approximated by a polynomial:
+	      expm1(r) ~ r + t1*r^2 + t2*r^3 + ... + t5*r^6
+	      Here t1 = 1/2 exactly.
+	   b. 2^(j/32) is represented to twice double precision
+	      as TBL[2j]+TBL[2j+1].
+
+   Note: If divide were fast enough, we could use another approximation
+	 in 2.a:
+	      expm1(r) ~ (2r)/(2-R), R = r - r^2*(t1 + t2*r^2)
+	      (for the same t1 and t2 as above)
+
+   Special cases:
+	exp(INF) is INF, exp(NaN) is NaN;
+	exp(-INF)=  0;
+	for finite argument, only exp(0)=1 is exact.
+
+   Accuracy:
+	According to an error analysis, the error is always less than
+	an ulp (unit in the last place).  The largest errors observed
+	are less than 0.55 ulp for normal results and less than 0.75 ulp
+	for subnormal results.
+
+   Misc. info.
+	For IEEE double
+		if x >  7.09782712893383973096e+02 then exp(x) overflow
+		if x < -7.45133219101941108420e+02 then exp(x) underflow
+ */
+
 #include <math.h>
+#include <math-svid-compat.h>
+#include <math_private.h>
+#include <errno.h>
 #include "endian.h"
 #include "uexp.h"
+#include "uexp.tbl"
 #include "mydefs.h"
 #include "MathLib.h"
-#include "uexp.tbl"
-#include <math_private.h>
 #include <fenv.h>
 #include <float.h>
 
-#ifndef SECTION
-# define SECTION
-#endif
+extern double __ieee754_exp (double);
+
+#include "eexp.tbl"
+
+static const double
+  half = 0.5,
+  one = 1.0;
 
-double __slowexp (double);
 
-/* An ultimate exp routine. Given an IEEE double machine number x it computes
-   the correctly rounded (to nearest) value of e^x.  */
 double
-SECTION
-__ieee754_exp (double x)
+__ieee754_exp (double x_arg)
 {
-  double bexp, t, eps, del, base, y, al, bet, res, rem, cor;
-  mynumber junk1, junk2, binexp = {{0, 0}};
-  int4 i, j, m, n, ex;
+  double z, t;
   double retval;
-
+  int hx, ix, k, j, m;
+  int fe_val;
+  union
   {
-    SET_RESTORE_ROUND (FE_TONEAREST);
-
-    junk1.x = x;
-    m = junk1.i[HIGH_HALF];
-    n = m & hugeint;
-
-    if (n > smallint && n < bigint)
-      {
-	y = x * log2e.x + three51.x;
-	bexp = y - three51.x;	/*  multiply the result by 2**bexp        */
-
-	junk1.x = y;
-
-	eps = bexp * ln_two2.x;	/* x = bexp*ln(2) + t - eps               */
-	t = x - bexp * ln_two1.x;
-
-	y = t + three33.x;
-	base = y - three33.x;	/* t rounded to a multiple of 2**-18      */
-	junk2.x = y;
-	del = (t - base) - eps;	/*  x = bexp*ln(2) + base + del           */
-	eps = del + del * del * (p3.x * del + p2.x);
-
-	binexp.i[HIGH_HALF] = (junk1.i[LOW_HALF] + 1023) << 20;
-
-	i = ((junk2.i[LOW_HALF] >> 8) & 0xfffffffe) + 356;
-	j = (junk2.i[LOW_HALF] & 511) << 1;
-
-	al = coar.x[i] * fine.x[j];
-	bet = ((coar.x[i] * fine.x[j + 1] + coar.x[i + 1] * fine.x[j])
-	       + coar.x[i + 1] * fine.x[j + 1]);
-
-	rem = (bet + bet * eps) + al * eps;
-	res = al + rem;
-	cor = (al - res) + rem;
-	if (res == (res + cor * err_0))
-	  {
-	    retval = res * binexp.x;
-	    goto ret;
+    int i_part[2];
+    double x;
+  } xx;
+  union
+  {
+    int y_part[2];
+    double y;
+  } yy;
+  xx.x = x_arg;
+
+  ix = xx.i_part[HIGH_HALF];
+  hx = ix & ~0x80000000;
+
+  if (hx < 0x3ff0a2b2)
+    {				/* |x| < 3/2 ln 2 */
+      if (hx < 0x3f862e42)
+	{			/* |x| < 1/64 ln 2 */
+	  if (hx < 0x3ed00000)
+	    {			/* |x| < 2^-18 */
+	      /* raise inexact if x != 0 */
+	      if (hx < 0x3e300000)
+		{
+		  retval = one + xx.x;
+		  return (retval);
+		}
+	      retval = one + xx.x * (one + half * xx.x);
+	      return (retval);
+	    }
+	  /* 
+	     Use FE_TONEAREST rounding mode for computing yy.y 
+	     Avoid set/reset of rounding mode if already in FE_TONEAREST mode
+	  */
+	  fe_val = get_rounding_mode ();
+	  if (fe_val == FE_TONEAREST) {
+	    t = xx.x * xx.x;
+	    yy.y = xx.x + (t * (half + xx.x * t2.x) +
+			   (t * t) * (t3.x + xx.x * t4.x + t * t5.x));
+	    retval = one + yy.y;
+	  } else {
+	    libc_fesetround (FE_TONEAREST);
+	    t = xx.x * xx.x;
+	    yy.y = xx.x + (t * (half + xx.x * t2.x) +
+			   (t * t) * (t3.x + xx.x * t4.x + t * t5.x));
+	    retval = one + yy.y;
+	    libc_fesetround (fe_val);
 	  }
-	else
-	  {
-	    retval = __slowexp (x);
-	    goto ret;
-	  }			/*if error is over bound */
-      }
+	  return (retval);
+	}
 
-    if (n <= smallint)
-      {
-	retval = 1.0;
-	goto ret;
+      /* find the multiple of 2^-6 nearest x */
+      k = hx >> 20;
+      j = (0x00100000 | (hx & 0x000fffff)) >> (0x40c - k);
+      j = (j - 1) & ~1;
+      if (ix < 0)
+	j += 134;
+      /* 
+	 Use FE_TONEAREST rounding mode for computing yy.y 
+	 Avoid set/reset of rounding mode if already in FE_TONEAREST mode
+      */
+      fe_val = get_rounding_mode ();
+      if (fe_val == FE_TONEAREST) {
+	z = xx.x - TBL2.x[j];
+	t = z * z;
+	yy.y = z + (t * (half + (z * t2.x)) +
+		    (t * t) * (t3.x + z * t4.x + t * t5.x));
+	retval = TBL2.x[j + 1] + TBL2.x[j + 1] * yy.y;
+      } else {
+	libc_fesetround (FE_TONEAREST);
+	z = xx.x - TBL2.x[j];
+	t = z * z;
+	yy.y = z + (t * (half + (z * t2.x)) +
+		    (t * t) * (t3.x + z * t4.x + t * t5.x));
+	retval = TBL2.x[j + 1] + TBL2.x[j + 1] * yy.y;
+	libc_fesetround (fe_val);
       }
+      return (retval);
+    }
 
-    if (n >= badint)
-      {
-	if (n > infint)
-	  {
-	    retval = x + x;
-	    goto ret;
-	  }			/* x is NaN */
-	if (n < infint)
-	  {
-	    if (x > 0)
-	      goto ret_huge;
-	    else
-	      goto ret_tiny;
-	  }
-	/* x is finite,  cause either overflow or underflow  */
-	if (junk1.i[LOW_HALF] != 0)
-	  {
-	    retval = x + x;
-	    goto ret;
-	  }			/*  x is NaN  */
-	retval = (x > 0) ? inf.x : zero;	/* |x| = inf;  return either inf or 0 */
-	goto ret;
-      }
+  if (hx >= 0x40862e42)
+    {				/* x is large, infinite, or nan */
+      if (hx >= 0x7ff00000)
+	{
+	  if (ix == 0xfff00000 && xx.i_part[LOW_HALF] == 0)
+	    return (zero);	/* exp(-inf) = 0 */
+	  return (xx.x * xx.x);	/* exp(nan/inf) is nan or inf */
+	}
+      if (xx.x > threshold1.x)
+	{			/* set overflow error condition */
+	  retval = hhuge * hhuge;
+	  return retval;
+	} 
+      if (-xx.x > threshold2.x)
+	{			/* set underflow error condition */
+	  double force_underflow = tiny * tiny;
+	  math_force_eval (force_underflow);
+	  retval = zero;
+	  return retval;
+	}
+    }
 
-    y = x * log2e.x + three51.x;
-    bexp = y - three51.x;
-    junk1.x = y;
-    eps = bexp * ln_two2.x;
-    t = x - bexp * ln_two1.x;
-    y = t + three33.x;
-    base = y - three33.x;
-    junk2.x = y;
-    del = (t - base) - eps;
-    eps = del + del * del * (p3.x * del + p2.x);
-    i = ((junk2.i[LOW_HALF] >> 8) & 0xfffffffe) + 356;
-    j = (junk2.i[LOW_HALF] & 511) << 1;
-    al = coar.x[i] * fine.x[j];
-    bet = ((coar.x[i] * fine.x[j + 1] + coar.x[i + 1] * fine.x[j])
-	   + coar.x[i + 1] * fine.x[j + 1]);
-    rem = (bet + bet * eps) + al * eps;
-    res = al + rem;
-    cor = (al - res) + rem;
-    if (m >> 31)
-      {
-	ex = junk1.i[LOW_HALF];
-	if (res < 1.0)
-	  {
-	    res += res;
-	    cor += cor;
-	    ex -= 1;
-	  }
-	if (ex >= -1022)
-	  {
-	    binexp.i[HIGH_HALF] = (1023 + ex) << 20;
-	    if (res == (res + cor * err_0))
-	      {
-		retval = res * binexp.x;
-		goto ret;
-	      }
-	    else
-	      {
-		retval = __slowexp (x);
-		goto check_uflow_ret;
-	      }			/*if error is over bound */
-	  }
-	ex = -(1022 + ex);
-	binexp.i[HIGH_HALF] = (1023 - ex) << 20;
-	res *= binexp.x;
-	cor *= binexp.x;
-	eps = 1.0000000001 + err_0 * binexp.x;
-	t = 1.0 + res;
-	y = ((1.0 - t) + res) + cor;
-	res = t + y;
-	cor = (t - res) + y;
-	if (res == (res + eps * cor))
-	  {
-	    binexp.i[HIGH_HALF] = 0x00100000;
-	    retval = (res - 1.0) * binexp.x;
-	    goto check_uflow_ret;
-	  }
-	else
-	  {
-	    retval = __slowexp (x);
-	    goto check_uflow_ret;
-	  }			/*   if error is over bound    */
-      check_uflow_ret:
-	if (retval < DBL_MIN)
-	  {
-	    double force_underflow = tiny * tiny;
-	    math_force_eval (force_underflow);
-	  }
-	if (retval == 0)
-	  goto ret_tiny;
-	goto ret;
-      }
+  /* 
+     Use FE_TONEAREST rounding mode for computing yy.y 
+     Avoid set/reset of rounding mode if already in FE_TONEAREST mode
+  */
+  fe_val = get_rounding_mode ();
+  if (fe_val == FE_TONEAREST) {
+    t = invln2_32.x * xx.x;
+    if (ix < 0)
+      t -= half;
     else
-      {
-	binexp.i[HIGH_HALF] = (junk1.i[LOW_HALF] + 767) << 20;
-	if (res == (res + cor * err_0))
-	  retval = res * binexp.x * t256.x;
-	else
-	  retval = __slowexp (x);
-	if (isinf (retval))
-	  goto ret_huge;
-	else
-	  goto ret;
-      }
+      t += half;
+    k = (int) t;
+    j = (k & 0x1f) << 1;
+    m = k >> 5;
+    z = (xx.x - k * ln2_32hi.x) - k * ln2_32lo.x;
+
+    /* z is now in primary range */
+    t = z * z;
+    yy.y = z + (t * (half + z * t2.x) + 
+		(t * t) * (t3.x + z * t4.x + t * t5.x));
+    yy.y = TBL.x[j] + (TBL.x[j + 1] + TBL.x[j] * yy.y);
+  } else {
+    libc_fesetround (FE_TONEAREST);
+    t = invln2_32.x * xx.x;
+    if (ix < 0)
+      t -= half;
+    else
+      t += half;
+    k = (int) t;
+    j = (k & 0x1f) << 1;
+    m = k >> 5;
+    z = (xx.x - k * ln2_32hi.x) - k * ln2_32lo.x;
+
+    /* z is now in primary range */
+    t = z * z;
+    yy.y = z + (t * (half + z * t2.x) +
+		(t * t) * (t3.x + z * t4.x + t * t5.x));
+    yy.y = TBL.x[j] + (TBL.x[j + 1] + TBL.x[j] * yy.y);
+    libc_fesetround (fe_val);
   }
-ret:
-  return retval;
 
- ret_huge:
-  return hhuge * hhuge;
-
- ret_tiny:
-  return tiny * tiny;
+  if (m < -1021)
+    {
+      yy.y_part[HIGH_HALF] += (m + 54) << 20;
+      retval = twom54.x * yy.y;
+      if (retval < DBL_MIN)
+	{
+	  double force_underflow = tiny * tiny;
+	  math_force_eval (force_underflow);
+	}
+      return retval;
+    }
+  yy.y_part[HIGH_HALF] += m << 20;
+  return (yy.y);
 }
 #ifndef __ieee754_exp
 strong_alias (__ieee754_exp, __exp_finite)
 #endif
 
+#ifndef SECTION
+# define SECTION
+#endif
+
 /* Compute e^(x+xx).  The routine also receives bound of error of previous
    calculation.  If after computing exp the error exceeds the allowed bounds,
    the routine returns a non-positive number.  Otherwise it returns the
diff --git a/sysdeps/ieee754/dbl-64/e_pow.c b/sysdeps/ieee754/dbl-64/e_pow.c
index 9f6439e..2eb8dbf 100644
--- a/sysdeps/ieee754/dbl-64/e_pow.c
+++ b/sysdeps/ieee754/dbl-64/e_pow.c
@@ -25,7 +25,7 @@ 
 /*             log1                                                        */
 /*             checkint                                                    */
 /* FILES NEEDED: dla.h endian.h mpa.h mydefs.h                             */
-/*               halfulp.c mpexp.c mplog.c slowexp.c slowpow.c mpa.c       */
+/*               halfulp.c mpexp.c mplog.c slowpow.c mpa.c                 */
 /*                          uexp.c  upow.c				   */
 /*               root.tbl uexp.tbl upow.tbl                                */
 /* An ultimate power routine. Given two IEEE double machine numbers y,x    */
diff --git a/sysdeps/ieee754/dbl-64/eexp.tbl b/sysdeps/ieee754/dbl-64/eexp.tbl
new file mode 100644
index 0000000..cecb8d4
--- /dev/null
+++ b/sysdeps/ieee754/dbl-64/eexp.tbl
@@ -0,0 +1,440 @@ 
+/* EXP function tables - for use in ocmputing double precisoin exponential
+   Copyright (C) 2017 Free Software Foundation, Inc.
+   This file is part of the GNU C Library.
+
+   The GNU C Library is free software; you can redistribute it and/or
+   modify it under the terms of the GNU Lesser General Public
+   License as published by the Free Software Foundation; either
+   version 2.1 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
+   Lesser General Public License for more details.
+
+   You should have received a copy of the GNU Lesser General Public
+   License along with the GNU C Library; if not, see
+   <http://www.gnu.org/licenses/>.  */
+
+#ifdef BIG_ENDI
+static const union {
+  int i[128];
+  double x[64];
+} TBL = { .i = {
+ 0x3FF00000, 0x00000000, 0x00000000, 0x00000000,
+ 0x3FF059B0, 0xD3158574, 0x3C8D73E2, 0xA475B465,
+ 0x3FF0B558, 0x6CF9890F, 0x3C98A62E, 0x4ADC610A,
+ 0x3FF11301, 0xD0125B51, 0xBC96C510, 0x39449B3A,
+ 0x3FF172B8, 0x3C7D517B, 0xBC819041, 0xB9D78A76,
+ 0x3FF1D487, 0x3168B9AA, 0x3C9E016E, 0x00A2643C,
+ 0x3FF2387A, 0x6E756238, 0x3C99B07E, 0xB6C70573,
+ 0x3FF29E9D, 0xF51FDEE1, 0x3C8612E8, 0xAFAD1255,
+ 0x3FF306FE, 0x0A31B715, 0x3C86F46A, 0xD23182E4,
+ 0x3FF371A7, 0x373AA9CB, 0xBC963AEA, 0xBF42EAE2,
+ 0x3FF3DEA6, 0x4C123422, 0x3C8ADA09, 0x11F09EBC,
+ 0x3FF44E08, 0x6061892D, 0x3C489B7A, 0x04EF80D0,
+ 0x3FF4BFDA, 0xD5362A27, 0x3C7D4397, 0xAFEC42E2,
+ 0x3FF5342B, 0x569D4F82, 0xBC807ABE, 0x1DB13CAC,
+ 0x3FF5AB07, 0xDD485429, 0x3C96324C, 0x054647AD,
+ 0x3FF6247E, 0xB03A5585, 0xBC9383C1, 0x7E40B497,
+ 0x3FF6A09E, 0x667F3BCD, 0xBC9BDD34, 0x13B26456,
+ 0x3FF71F75, 0xE8EC5F74, 0xBC816E47, 0x86887A99,
+ 0x3FF7A114, 0x73EB0187, 0xBC841577, 0xEE04992F,
+ 0x3FF82589, 0x994CCE13, 0xBC9D4C1D, 0xD41532D8,
+ 0x3FF8ACE5, 0x422AA0DB, 0x3C96E9F1, 0x56864B27,
+ 0x3FF93737, 0xB0CDC5E5, 0xBC675FC7, 0x81B57EBC,
+ 0x3FF9C491, 0x82A3F090, 0x3C7C7C46, 0xB071F2BE,
+ 0x3FFA5503, 0xB23E255D, 0xBC9D2F6E, 0xDB8D41E1,
+ 0x3FFAE89F, 0x995AD3AD, 0x3C97A1CD, 0x345DCC81,
+ 0x3FFB7F76, 0xF2FB5E47, 0xBC75584F, 0x7E54AC3B,
+ 0x3FFC199B, 0xDD85529C, 0x3C811065, 0x895048DD,
+ 0x3FFCB720, 0xDCEF9069, 0x3C7503CB, 0xD1E949DB,
+ 0x3FFD5818, 0xDCFBA487, 0x3C82ED02, 0xD75B3706,
+ 0x3FFDFC97, 0x337B9B5F, 0xBC91A5CD, 0x4F184B5C,
+ 0x3FFEA4AF, 0xA2A490DA, 0xBC9E9C23, 0x179C2893,
+ 0x3FFF5076, 0x5B6E4540, 0x3C99D3E1, 0x2DD8A18B } };
+
+/*
+   For i = 0, ..., 66,
+     TBL2[2*i] is a double precision number near (i+1)*2^-6, and
+     TBL2[2*i+1] = exp(TBL2[2*i]) to within a relative error less
+     than 2^-60.
+
+   For i = 67, ..., 133,
+     TBL2[2*i] is a double precision number near -(i+1)*2^-6, and
+     TBL2[2*i+1] = exp(TBL2[2*i]) to within a relative error less
+     than 2^-60.
+*/
+static const union {
+  int i[536];
+  double x[268];
+} TBL2 = { .i = {
+ 0x3F8FFFFF, 0xFFFFFC82, 0x3FF04080, 0xAB55DE32,
+ 0x3F9FFFFF, 0xFFFFFFDB, 0x3FF08205, 0x601127EC,
+ 0x3FA80000, 0x000000A0, 0x3FF0C492, 0x36829E91,
+ 0x3FAFFFFF, 0xFFFFFF79, 0x3FF1082B, 0x577D34E9,
+ 0x3FB3FFFF, 0xFFFFFFFC, 0x3FF14CD4, 0xFC989CD6,
+ 0x3FB80000, 0x00000060, 0x3FF19293, 0x7074E0D4,
+ 0x3FBC0000, 0x00000061, 0x3FF1D96B, 0x0EFF0E80,
+ 0x3FBFFFFF, 0xFFFFFFD6, 0x3FF22160, 0x45B6F5CA,
+ 0x3FC1FFFF, 0xFFFFFF58, 0x3FF26A77, 0x93F6014C,
+ 0x3FC3FFFF, 0xFFFFFF75, 0x3FF2B4B5, 0x8B372C65,
+ 0x3FC5FFFF, 0xFFFFFF00, 0x3FF3001E, 0xCF601AD1,
+ 0x3FC80000, 0x00000020, 0x3FF34CB8, 0x170B583A,
+ 0x3FC9FFFF, 0xFFFFA629, 0x3FF39A86, 0x2BD3B344,
+ 0x3FCC0000, 0x0000000F, 0x3FF3E98D, 0xEAA11DCE,
+ 0x3FCE0000, 0x0000007F, 0x3FF439D4, 0x43F5F16D,
+ 0x3FD00000, 0x00000072, 0x3FF48B5E, 0x3C3E81AB,
+ 0x3FD0FFFF, 0xFFFFFECA, 0x3FF4DE30, 0xEC211DFB,
+ 0x3FD1FFFF, 0xFFFFFF8F, 0x3FF53251, 0x80CFACD2,
+ 0x3FD30000, 0x0000003B, 0x3FF587C5, 0x3C5A7B04,
+ 0x3FD40000, 0x00000034, 0x3FF5DE91, 0x76046007,
+ 0x3FD4FFFF, 0xFFFFFF89, 0x3FF636BB, 0x9A98322F,
+ 0x3FD5FFFF, 0xFFFFFFE7, 0x3FF69049, 0x2CBF942A,
+ 0x3FD6FFFF, 0xFFFFFF78, 0x3FF6EB3F, 0xC55B1E45,
+ 0x3FD7FFFF, 0xFFFFFF65, 0x3FF747A5, 0x13DBEF32,
+ 0x3FD8FFFF, 0xFFFFFFD5, 0x3FF7A57E, 0xDE9EA22E,
+ 0x3FD9FFFF, 0xFFFFFF6E, 0x3FF804D3, 0x0347B50F,
+ 0x3FDAFFFF, 0xFFFFFFC3, 0x3FF865A7, 0x772164AE,
+ 0x3FDC0000, 0x00000053, 0x3FF8C802, 0x477B0030,
+ 0x3FDD0000, 0x0000004D, 0x3FF92BE9, 0x9A09BF1E,
+ 0x3FDE0000, 0x00000096, 0x3FF99163, 0xAD4B1E08,
+ 0x3FDEFFFF, 0xFFFFFEFA, 0x3FF9F876, 0xD8E8C4FC,
+ 0x3FDFFFFF, 0xFFFFFFD0, 0x3FFA6129, 0x8E1E0688,
+ 0x3FE08000, 0x00000002, 0x3FFACB82, 0x581EEE56,
+ 0x3FE10000, 0x0000001F, 0x3FFB3787, 0xDC80F979,
+ 0x3FE17FFF, 0xFFFFFFF8, 0x3FFBA540, 0xDBA56E4F,
+ 0x3FE1FFFF, 0xFFFFFFFA, 0x3FFC14B4, 0x31256441,
+ 0x3FE27FFF, 0xFFFFFFC4, 0x3FFC85E8, 0xD43F7C9B,
+ 0x3FE2FFFF, 0xFFFFFFFD, 0x3FFCF8E5, 0xD84758A6,
+ 0x3FE38000, 0x0000001F, 0x3FFD6DB2, 0x6D16CD84,
+ 0x3FE3FFFF, 0xFFFFFFD8, 0x3FFDE455, 0xDF80E39B,
+ 0x3FE48000, 0x00000052, 0x3FFE5CD7, 0x99C6A59C,
+ 0x3FE4FFFF, 0xFFFFFFC8, 0x3FFED73F, 0x240DC10C,
+ 0x3FE58000, 0x00000013, 0x3FFF5394, 0x24D90F71,
+ 0x3FE5FFFF, 0xFFFFFFBC, 0x3FFFD1DE, 0x6182F885,
+ 0x3FE68000, 0x0000002D, 0x40002912, 0xDF5CE741,
+ 0x3FE70000, 0x00000040, 0x40006A39, 0x207F0A2A,
+ 0x3FE78000, 0x0000004F, 0x4000AC66, 0x0691652A,
+ 0x3FE7FFFF, 0xFFFFFF6F, 0x4000EF9D, 0xB467DCAB,
+ 0x3FE87FFF, 0xFFFFFFE5, 0x400133E4, 0x5D82E943,
+ 0x3FE90000, 0x00000035, 0x4001793E, 0x4652CC6D,
+ 0x3FE97FFF, 0xFFFFFFB3, 0x4001BFAF, 0xC47BDA48,
+ 0x3FEA0000, 0x00000000, 0x4002073D, 0x3F1BD518,
+ 0x3FEA8000, 0x0000004A, 0x40024FEB, 0x2F105CE2,
+ 0x3FEAFFFF, 0xFFFFFFED, 0x400299BE, 0x1F3E7F11,
+ 0x3FEB7FFF, 0xFFFFFFFB, 0x4002E4BA, 0xACDB6611,
+ 0x3FEC0000, 0x0000001D, 0x400330E5, 0x87B62B39,
+ 0x3FEC8000, 0x00000079, 0x40037E43, 0x7282D538,
+ 0x3FECFFFF, 0xFFFFFF51, 0x4003CCD9, 0x43268248,
+ 0x3FED7FFF, 0xFFFFFF74, 0x40041CAB, 0xE304CADC,
+ 0x3FEE0000, 0x00000011, 0x40046DC0, 0x4F4E5343,
+ 0x3FEE8000, 0x0000001E, 0x4004C01B, 0x9950A124,
+ 0x3FEEFFFF, 0xFFFFFF9E, 0x400513C2, 0xE6C73196,
+ 0x3FEF7FFF, 0xFFFFFFED, 0x400568BB, 0x722DD586,
+ 0x3FF00000, 0x00000034, 0x4005BF0A, 0x8B1457B0,
+ 0x3FF03FFF, 0xFFFFFFE2, 0x400616B5, 0x967376DF,
+ 0x3FF07FFF, 0xFFFFFF4B, 0x40066FC2, 0x0F0337A9,
+ 0x3FF0BFFF, 0xFFFFFFFD, 0x4006CA35, 0x859290F5,
+ 0xBF8FFFFF, 0xFFFFFFE4, 0x3FEF80FE, 0xABFEEFA5,
+ 0xBF9FFFFF, 0xFFFFFB0B, 0x3FEF03F5, 0x6A88B5FE,
+ 0xBFA7FFFF, 0xFFFFFFA7, 0x3FEE88DC, 0x6AFECFC5,
+ 0xBFAFFFFF, 0xFFFFFEA8, 0x3FEE0FAB, 0xFBC702B8,
+ 0xBFB3FFFF, 0xFFFFFFB3, 0x3FED985C, 0x89D041AC,
+ 0xBFB7FFFF, 0xFFFFFFE3, 0x3FED22E6, 0xA0197C06,
+ 0xBFBBFFFF, 0xFFFFFF9A, 0x3FECAF42, 0xE73A4C89,
+ 0xBFBFFFFF, 0xFFFFFF98, 0x3FEC3D6A, 0x24ED822D,
+ 0xBFC1FFFF, 0xFFFFFFE9, 0x3FEBCD55, 0x3B9D7B67,
+ 0xBFC3FFFF, 0xFFFFFFE0, 0x3FEB5EFD, 0x29F24C2D,
+ 0xBFC5FFFF, 0xFFFFF553, 0x3FEAF25B, 0x0A61A9F4,
+ 0xBFC7FFFF, 0xFFFFFF8B, 0x3FEA8768, 0x12C08794,
+ 0xBFC9FFFF, 0xFFFFFE51, 0x3FEA1E1D, 0x93D68828,
+ 0xBFCBFFFF, 0xFFFFFF6E, 0x3FE9B674, 0xF8F2F3F5,
+ 0xBFCDFFFF, 0xFFFFFF7F, 0x3FE95067, 0xC7837A0C,
+ 0xBFCFFFFF, 0xFFFFFF7A, 0x3FE8EBEF, 0x9EAC8225,
+ 0xBFD0FFFF, 0xFFFFFFFE, 0x3FE88906, 0x36E31F55,
+ 0xBFD1FFFF, 0xFFFFFF41, 0x3FE827A5, 0x6188975E,
+ 0xBFD2FFFF, 0xFFFFFFBA, 0x3FE7C7C7, 0x08877656,
+ 0xBFD3FFFF, 0xFFFFFFF8, 0x3FE76965, 0x2DF22F81,
+ 0xBFD4FFFF, 0xFFFFFF90, 0x3FE70C79, 0xEBA33C2F,
+ 0xBFD5FFFF, 0xFFFFFFDB, 0x3FE6B0FF, 0x72DEB8AA,
+ 0xBFD6FFFF, 0xFFFFFF9A, 0x3FE656F0, 0x0BF5798E,
+ 0xBFD7FFFF, 0xFFFFFF9F, 0x3FE5FE46, 0x15E98EB0,
+ 0xBFD8FFFF, 0xFFFFFFEE, 0x3FE5A6FC, 0x061433CE,
+ 0xBFD9FFFF, 0xFFFFFC4A, 0x3FE5510C, 0x67CD26CD,
+ 0xBFDAFFFF, 0xFFFFFF30, 0x3FE4FC71, 0xDC13566B,
+ 0xBFDBFFFF, 0xFFFFFFF0, 0x3FE4A927, 0x1936FD0E,
+ 0xBFDCFFFF, 0xFFFFFFF3, 0x3FE45726, 0xEA84FB8C,
+ 0xBFDDFFFF, 0xFFFFFFF3, 0x3FE4066C, 0x2FF3912B,
+ 0xBFDEFFFF, 0xFFFFFF80, 0x3FE3B6F1, 0xDDD05AB9,
+ 0xBFDFFFFF, 0xFFFFFFDF, 0x3FE368B2, 0xFC6F9614,
+ 0xBFE08000, 0x00000000, 0x3FE31BAA, 0xA7DCA843,
+ 0xBFE0FFFF, 0xFFFFFFA4, 0x3FE2CFD4, 0x0F8BDCE4,
+ 0xBFE17FFF, 0xFFFFFF0A, 0x3FE2852A, 0x760D5CE7,
+ 0xBFE20000, 0x00000000, 0x3FE23BA9, 0x30C1568B,
+ 0xBFE27FFF, 0xFFFFFFBB, 0x3FE1F34B, 0xA78D568D,
+ 0xBFE2FFFF, 0xFFFFFE32, 0x3FE1AC0D, 0x5492C1DB,
+ 0xBFE37FFF, 0xFFFFF042, 0x3FE165E9, 0xC3E67EF2,
+ 0xBFE3FFFF, 0xFFFFFF77, 0x3FE120DC, 0x93499431,
+ 0xBFE47FFF, 0xFFFFFF6B, 0x3FE0DCE1, 0x71E34ECE,
+ 0xBFE4FFFF, 0xFFFFFFF1, 0x3FE099F4, 0x1FFBE588,
+ 0xBFE57FFF, 0xFFFFFE02, 0x3FE05810, 0x6EB8A7AE,
+ 0xBFE5FFFF, 0xFFFFFFE5, 0x3FE01732, 0x3FD9002E,
+ 0xBFE67FFF, 0xFFFFFFB0, 0x3FDFAEAB, 0x0AE9386C,
+ 0xBFE6FFFF, 0xFFFFFFB2, 0x3FDF30EC, 0x837503D7,
+ 0xBFE77FFF, 0xFFFFFF7F, 0x3FDEB521, 0x0D627133,
+ 0xBFE7FFFF, 0xFFFFFFE8, 0x3FDE3B40, 0xEBEFCD95,
+ 0xBFE87FFF, 0xFFFFFFC8, 0x3FDDC344, 0x8110DAE2,
+ 0xBFE8FFFF, 0xFFFFFB30, 0x3FDD4D24, 0x4CF4EF06,
+ 0xBFE97FFF, 0xFFFFFFEF, 0x3FDCD8D8, 0xED8EE395,
+ 0xBFE9FFFF, 0xFFFFFFA7, 0x3FDC665B, 0x1E1F1E5C,
+ 0xBFEA7FFF, 0xFFFFFFDC, 0x3FDBF5A3, 0xB6BF18D6,
+ 0xBFEAFFFF, 0xFFFFFF95, 0x3FDB86AB, 0xABEEF93B,
+ 0xBFEB7FFF, 0xFFFFFFCB, 0x3FDB196C, 0x0E24D256,
+ 0xBFEBFFFF, 0xFFFFFF32, 0x3FDAADDE, 0x095DADF7,
+ 0xBFEC7FFF, 0xFFFFFF6A, 0x3FDA43FA, 0xE4B047C9,
+ 0xBFECFFFF, 0xFFFFFFB6, 0x3FD9DBBC, 0x01E182A4,
+ 0xBFED7FFF, 0xFFFFFFCA, 0x3FD9751A, 0xDCFA81EC,
+ 0xBFEDFFFF, 0xFFFFFFCD, 0x3FD91011, 0x0BE0699E,
+ 0xBFEE7FFF, 0xFFFFFFFB, 0x3FD8AC98, 0x3DEDBC69,
+ 0xBFEEFFFF, 0xFFFFFF88, 0x3FD84AAA, 0x3B8D51A9,
+ 0xBFEF7FFF, 0xFFFFFFBB, 0x3FD7EA40, 0xE5D6D92E,
+ 0xBFEFFFFF, 0xFFFFFFDB, 0x3FD78B56, 0x362CEF53,
+ 0xBFF03FFF, 0xFFFFFF00, 0x3FD72DE4, 0x3DDCB1F2,
+ 0xBFF07FFF, 0xFFFFFE6F, 0x3FD6D1E5, 0x25BED085,
+ 0xBFF0BFFF, 0xFFFFFFD6, 0x3FD67753, 0x2DDA1C57 } };
+
+#else
+#ifdef LITTLE_ENDI
+
+static const union {
+  int i[128];
+  double x[64];
+} TBL = { .i = {
+ 0x00000000, 0x3FF00000, 0x00000000, 0x00000000,
+ 0xD3158574, 0x3FF059B0, 0xA475B465, 0x3C8D73E2,
+ 0x6CF9890F, 0x3FF0B558, 0x4ADC610A, 0x3C98A62E,
+ 0xD0125B51, 0x3FF11301, 0x39449B3A, 0xBC96C510,
+ 0x3C7D517B, 0x3FF172B8, 0xB9D78A76, 0xBC819041,
+ 0x3168B9AA, 0x3FF1D487, 0x00A2643C, 0x3C9E016E,
+ 0x6E756238, 0x3FF2387A, 0xB6C70573, 0x3C99B07E,
+ 0xF51FDEE1, 0x3FF29E9D, 0xAFAD1255, 0x3C8612E8,
+ 0x0A31B715, 0x3FF306FE, 0xD23182E4, 0x3C86F46A,
+ 0x373AA9CB, 0x3FF371A7, 0xBF42EAE2, 0xBC963AEA,
+ 0x4C123422, 0x3FF3DEA6, 0x11F09EBC, 0x3C8ADA09,
+ 0x6061892D, 0x3FF44E08, 0x04EF80D0, 0x3C489B7A,
+ 0xD5362A27, 0x3FF4BFDA, 0xAFEC42E2, 0x3C7D4397,
+ 0x569D4F82, 0x3FF5342B, 0x1DB13CAC, 0xBC807ABE,
+ 0xDD485429, 0x3FF5AB07, 0x054647AD, 0x3C96324C,
+ 0xB03A5585, 0x3FF6247E, 0x7E40B497, 0xBC9383C1,
+ 0x667F3BCD, 0x3FF6A09E, 0x13B26456, 0xBC9BDD34,
+ 0xE8EC5F74, 0x3FF71F75, 0x86887A99, 0xBC816E47,
+ 0x73EB0187, 0x3FF7A114, 0xEE04992F, 0xBC841577,
+ 0x994CCE13, 0x3FF82589, 0xD41532D8, 0xBC9D4C1D,
+ 0x422AA0DB, 0x3FF8ACE5, 0x56864B27, 0x3C96E9F1,
+ 0xB0CDC5E5, 0x3FF93737, 0x81B57EBC, 0xBC675FC7,
+ 0x82A3F090, 0x3FF9C491, 0xB071F2BE, 0x3C7C7C46,
+ 0xB23E255D, 0x3FFA5503, 0xDB8D41E1, 0xBC9D2F6E,
+ 0x995AD3AD, 0x3FFAE89F, 0x345DCC81, 0x3C97A1CD,
+ 0xF2FB5E47, 0x3FFB7F76, 0x7E54AC3B, 0xBC75584F,
+ 0xDD85529C, 0x3FFC199B, 0x895048DD, 0x3C811065,
+ 0xDCEF9069, 0x3FFCB720, 0xD1E949DB, 0x3C7503CB,
+ 0xDCFBA487, 0x3FFD5818, 0xD75B3706, 0x3C82ED02,
+ 0x337B9B5F, 0x3FFDFC97, 0x4F184B5C, 0xBC91A5CD,
+ 0xA2A490DA, 0x3FFEA4AF, 0x179C2893, 0xBC9E9C23,
+ 0x5B6E4540, 0x3FFF5076, 0x2DD8A18B, 0x3C99D3E1 } };
+/*
+   For i = 0, ..., 66,
+     TBL2[2*i] is a double precision number near (i+1)*2^-6, and
+     TBL2[2*i+1] = exp(TBL2[2*i]) to within a relative error less
+     than 2^-60.
+
+   For i = 67, ..., 133,
+     TBL2[2*i] is a double precision number near -(i+1)*2^-6, and
+     TBL2[2*i+1] = exp(TBL2[2*i]) to within a relative error less
+     than 2^-60.
+*/
+static const union {
+  int i[536];
+  double x[268];
+} TBL2 = { .i = {
+ 0xFFFFFC82, 0x3F8FFFFF, 0xAB55DE32, 0x3FF04080,
+ 0xFFFFFFDB, 0x3F9FFFFF, 0x601127EC, 0x3FF08205,
+ 0x000000A0, 0x3FA80000, 0x36829E91, 0x3FF0C492,
+ 0xFFFFFF79, 0x3FAFFFFF, 0x577D34E9, 0x3FF1082B,
+ 0xFFFFFFFC, 0x3FB3FFFF, 0xFC989CD6, 0x3FF14CD4,
+ 0x00000060, 0x3FB80000, 0x7074E0D4, 0x3FF19293,
+ 0x00000061, 0x3FBC0000, 0x0EFF0E80, 0x3FF1D96B,
+ 0xFFFFFFD6, 0x3FBFFFFF, 0x45B6F5CA, 0x3FF22160,
+ 0xFFFFFF58, 0x3FC1FFFF, 0x93F6014C, 0x3FF26A77,
+ 0xFFFFFF75, 0x3FC3FFFF, 0x8B372C65, 0x3FF2B4B5,
+ 0xFFFFFF00, 0x3FC5FFFF, 0xCF601AD1, 0x3FF3001E,
+ 0x00000020, 0x3FC80000, 0x170B583A, 0x3FF34CB8,
+ 0xFFFFA629, 0x3FC9FFFF, 0x2BD3B344, 0x3FF39A86,
+ 0x0000000F, 0x3FCC0000, 0xEAA11DCE, 0x3FF3E98D,
+ 0x0000007F, 0x3FCE0000, 0x43F5F16D, 0x3FF439D4,
+ 0x00000072, 0x3FD00000, 0x3C3E81AB, 0x3FF48B5E,
+ 0xFFFFFECA, 0x3FD0FFFF, 0xEC211DFB, 0x3FF4DE30,
+ 0xFFFFFF8F, 0x3FD1FFFF, 0x80CFACD2, 0x3FF53251,
+ 0x0000003B, 0x3FD30000, 0x3C5A7B04, 0x3FF587C5,
+ 0x00000034, 0x3FD40000, 0x76046007, 0x3FF5DE91,
+ 0xFFFFFF89, 0x3FD4FFFF, 0x9A98322F, 0x3FF636BB,
+ 0xFFFFFFE7, 0x3FD5FFFF, 0x2CBF942A, 0x3FF69049,
+ 0xFFFFFF78, 0x3FD6FFFF, 0xC55B1E45, 0x3FF6EB3F,
+ 0xFFFFFF65, 0x3FD7FFFF, 0x13DBEF32, 0x3FF747A5,
+ 0xFFFFFFD5, 0x3FD8FFFF, 0xDE9EA22E, 0x3FF7A57E,
+ 0xFFFFFF6E, 0x3FD9FFFF, 0x0347B50F, 0x3FF804D3,
+ 0xFFFFFFC3, 0x3FDAFFFF, 0x772164AE, 0x3FF865A7,
+ 0x00000053, 0x3FDC0000, 0x477B0030, 0x3FF8C802,
+ 0x0000004D, 0x3FDD0000, 0x9A09BF1E, 0x3FF92BE9,
+ 0x00000096, 0x3FDE0000, 0xAD4B1E08, 0x3FF99163,
+ 0xFFFFFEFA, 0x3FDEFFFF, 0xD8E8C4FC, 0x3FF9F876,
+ 0xFFFFFFD0, 0x3FDFFFFF, 0x8E1E0688, 0x3FFA6129,
+ 0x00000002, 0x3FE08000, 0x581EEE56, 0x3FFACB82,
+ 0x0000001F, 0x3FE10000, 0xDC80F979, 0x3FFB3787,
+ 0xFFFFFFF8, 0x3FE17FFF, 0xDBA56E4F, 0x3FFBA540,
+ 0xFFFFFFFA, 0x3FE1FFFF, 0x31256441, 0x3FFC14B4,
+ 0xFFFFFFC4, 0x3FE27FFF, 0xD43F7C9B, 0x3FFC85E8,
+ 0xFFFFFFFD, 0x3FE2FFFF, 0xD84758A6, 0x3FFCF8E5,
+ 0x0000001F, 0x3FE38000, 0x6D16CD84, 0x3FFD6DB2,
+ 0xFFFFFFD8, 0x3FE3FFFF, 0xDF80E39B, 0x3FFDE455,
+ 0x00000052, 0x3FE48000, 0x99C6A59C, 0x3FFE5CD7,
+ 0xFFFFFFC8, 0x3FE4FFFF, 0x240DC10C, 0x3FFED73F,
+ 0x00000013, 0x3FE58000, 0x24D90F71, 0x3FFF5394,
+ 0xFFFFFFBC, 0x3FE5FFFF, 0x6182F885, 0x3FFFD1DE,
+ 0x0000002D, 0x3FE68000, 0xDF5CE741, 0x40002912,
+ 0x00000040, 0x3FE70000, 0x207F0A2A, 0x40006A39,
+ 0x0000004F, 0x3FE78000, 0x0691652A, 0x4000AC66,
+ 0xFFFFFF6F, 0x3FE7FFFF, 0xB467DCAB, 0x4000EF9D,
+ 0xFFFFFFE5, 0x3FE87FFF, 0x5D82E943, 0x400133E4,
+ 0x00000035, 0x3FE90000, 0x4652CC6D, 0x4001793E,
+ 0xFFFFFFB3, 0x3FE97FFF, 0xC47BDA48, 0x4001BFAF,
+ 0x00000000, 0x3FEA0000, 0x3F1BD518, 0x4002073D,
+ 0x0000004A, 0x3FEA8000, 0x2F105CE2, 0x40024FEB,
+ 0xFFFFFFED, 0x3FEAFFFF, 0x1F3E7F11, 0x400299BE,
+ 0xFFFFFFFB, 0x3FEB7FFF, 0xACDB6611, 0x4002E4BA,
+ 0x0000001D, 0x3FEC0000, 0x87B62B39, 0x400330E5,
+ 0x00000079, 0x3FEC8000, 0x7282D538, 0x40037E43,
+ 0xFFFFFF51, 0x3FECFFFF, 0x43268248, 0x4003CCD9,
+ 0xFFFFFF74, 0x3FED7FFF, 0xE304CADC, 0x40041CAB,
+ 0x00000011, 0x3FEE0000, 0x4F4E5343, 0x40046DC0,
+ 0x0000001E, 0x3FEE8000, 0x9950A124, 0x4004C01B,
+ 0xFFFFFF9E, 0x3FEEFFFF, 0xE6C73196, 0x400513C2,
+ 0xFFFFFFED, 0x3FEF7FFF, 0x722DD586, 0x400568BB,
+ 0x00000034, 0x3FF00000, 0x8B1457B0, 0x4005BF0A,
+ 0xFFFFFFE2, 0x3FF03FFF, 0x967376DF, 0x400616B5,
+ 0xFFFFFF4B, 0x3FF07FFF, 0x0F0337A9, 0x40066FC2,
+ 0xFFFFFFFD, 0x3FF0BFFF, 0x859290F5, 0x4006CA35,
+ 0xFFFFFFE4, 0xBF8FFFFF, 0xABFEEFA5, 0x3FEF80FE,
+ 0xFFFFFB0B, 0xBF9FFFFF, 0x6A88B5FE, 0x3FEF03F5,
+ 0xFFFFFFA7, 0xBFA7FFFF, 0x6AFECFC5, 0x3FEE88DC,
+ 0xFFFFFEA8, 0xBFAFFFFF, 0xFBC702B8, 0x3FEE0FAB,
+ 0xFFFFFFB3, 0xBFB3FFFF, 0x89D041AC, 0x3FED985C,
+ 0xFFFFFFE3, 0xBFB7FFFF, 0xA0197C06, 0x3FED22E6,
+ 0xFFFFFF9A, 0xBFBBFFFF, 0xE73A4C89, 0x3FECAF42,
+ 0xFFFFFF98, 0xBFBFFFFF, 0x24ED822D, 0x3FEC3D6A,
+ 0xFFFFFFE9, 0xBFC1FFFF, 0x3B9D7B67, 0x3FEBCD55,
+ 0xFFFFFFE0, 0xBFC3FFFF, 0x29F24C2D, 0x3FEB5EFD,
+ 0xFFFFF553, 0xBFC5FFFF, 0x0A61A9F4, 0x3FEAF25B,
+ 0xFFFFFF8B, 0xBFC7FFFF, 0x12C08794, 0x3FEA8768,
+ 0xFFFFFE51, 0xBFC9FFFF, 0x93D68828, 0x3FEA1E1D,
+ 0xFFFFFF6E, 0xBFCBFFFF, 0xF8F2F3F5, 0x3FE9B674,
+ 0xFFFFFF7F, 0xBFCDFFFF, 0xC7837A0C, 0x3FE95067,
+ 0xFFFFFF7A, 0xBFCFFFFF, 0x9EAC8225, 0x3FE8EBEF,
+ 0xFFFFFFFE, 0xBFD0FFFF, 0x36E31F55, 0x3FE88906,
+ 0xFFFFFF41, 0xBFD1FFFF, 0x6188975E, 0x3FE827A5,
+ 0xFFFFFFBA, 0xBFD2FFFF, 0x08877656, 0x3FE7C7C7,
+ 0xFFFFFFF8, 0xBFD3FFFF, 0x2DF22F81, 0x3FE76965,
+ 0xFFFFFF90, 0xBFD4FFFF, 0xEBA33C2F, 0x3FE70C79,
+ 0xFFFFFFDB, 0xBFD5FFFF, 0x72DEB8AA, 0x3FE6B0FF,
+ 0xFFFFFF9A, 0xBFD6FFFF, 0x0BF5798E, 0x3FE656F0,
+ 0xFFFFFF9F, 0xBFD7FFFF, 0x15E98EB0, 0x3FE5FE46,
+ 0xFFFFFFEE, 0xBFD8FFFF, 0x061433CE, 0x3FE5A6FC,
+ 0xFFFFFC4A, 0xBFD9FFFF, 0x67CD26CD, 0x3FE5510C,
+ 0xFFFFFF30, 0xBFDAFFFF, 0xDC13566B, 0x3FE4FC71,
+ 0xFFFFFFF0, 0xBFDBFFFF, 0x1936FD0E, 0x3FE4A927,
+ 0xFFFFFFF3, 0xBFDCFFFF, 0xEA84FB8C, 0x3FE45726,
+ 0xFFFFFFF3, 0xBFDDFFFF, 0x2FF3912B, 0x3FE4066C,
+ 0xFFFFFF80, 0xBFDEFFFF, 0xDDD05AB9, 0x3FE3B6F1,
+ 0xFFFFFFDF, 0xBFDFFFFF, 0xFC6F9614, 0x3FE368B2,
+ 0x00000000, 0xBFE08000, 0xA7DCA843, 0x3FE31BAA,
+ 0xFFFFFFA4, 0xBFE0FFFF, 0x0F8BDCE4, 0x3FE2CFD4,
+ 0xFFFFFF0A, 0xBFE17FFF, 0x760D5CE7, 0x3FE2852A,
+ 0x00000000, 0xBFE20000, 0x30C1568B, 0x3FE23BA9,
+ 0xFFFFFFBB, 0xBFE27FFF, 0xA78D568D, 0x3FE1F34B,
+ 0xFFFFFE32, 0xBFE2FFFF, 0x5492C1DB, 0x3FE1AC0D,
+ 0xFFFFF042, 0xBFE37FFF, 0xC3E67EF2, 0x3FE165E9,
+ 0xFFFFFF77, 0xBFE3FFFF, 0x93499431, 0x3FE120DC,
+ 0xFFFFFF6B, 0xBFE47FFF, 0x71E34ECE, 0x3FE0DCE1,
+ 0xFFFFFFF1, 0xBFE4FFFF, 0x1FFBE588, 0x3FE099F4,
+ 0xFFFFFE02, 0xBFE57FFF, 0x6EB8A7AE, 0x3FE05810,
+ 0xFFFFFFE5, 0xBFE5FFFF, 0x3FD9002E, 0x3FE01732,
+ 0xFFFFFFB0, 0xBFE67FFF, 0x0AE9386C, 0x3FDFAEAB,
+ 0xFFFFFFB2, 0xBFE6FFFF, 0x837503D7, 0x3FDF30EC,
+ 0xFFFFFF7F, 0xBFE77FFF, 0x0D627133, 0x3FDEB521,
+ 0xFFFFFFE8, 0xBFE7FFFF, 0xEBEFCD95, 0x3FDE3B40,
+ 0xFFFFFFC8, 0xBFE87FFF, 0x8110DAE2, 0x3FDDC344,
+ 0xFFFFFB30, 0xBFE8FFFF, 0x4CF4EF06, 0x3FDD4D24,
+ 0xFFFFFFEF, 0xBFE97FFF, 0xED8EE395, 0x3FDCD8D8,
+ 0xFFFFFFA7, 0xBFE9FFFF, 0x1E1F1E5C, 0x3FDC665B,
+ 0xFFFFFFDC, 0xBFEA7FFF, 0xB6BF18D6, 0x3FDBF5A3,
+ 0xFFFFFF95, 0xBFEAFFFF, 0xABEEF93B, 0x3FDB86AB,
+ 0xFFFFFFCB, 0xBFEB7FFF, 0x0E24D256, 0x3FDB196C,
+ 0xFFFFFF32, 0xBFEBFFFF, 0x095DADF7, 0x3FDAADDE,
+ 0xFFFFFF6A, 0xBFEC7FFF, 0xE4B047C9, 0x3FDA43FA,
+ 0xFFFFFFB6, 0xBFECFFFF, 0x01E182A4, 0x3FD9DBBC,
+ 0xFFFFFFCA, 0xBFED7FFF, 0xDCFA81EC, 0x3FD9751A,
+ 0xFFFFFFCD, 0xBFEDFFFF, 0x0BE0699E, 0x3FD91011,
+ 0xFFFFFFFB, 0xBFEE7FFF, 0x3DEDBC69, 0x3FD8AC98,
+ 0xFFFFFF88, 0xBFEEFFFF, 0x3B8D51A9, 0x3FD84AAA,
+ 0xFFFFFFBB, 0xBFEF7FFF, 0xE5D6D92E, 0x3FD7EA40,
+ 0xFFFFFFDB, 0xBFEFFFFF, 0x362CEF53, 0x3FD78B56,
+ 0xFFFFFF00, 0xBFF03FFF, 0x3DDCB1F2, 0x3FD72DE4,
+ 0xFFFFFE6F, 0xBFF07FFF, 0x25BED085, 0x3FD6D1E5,
+ 0xFFFFFFD6, 0xBFF0BFFF, 0x2DDA1C57, 0x3FD67753 } };
+
+#endif
+#endif
+
+
+#ifdef BIG_ENDI
+
+static const mynumber 
+/* Following three values used to scale x to primary range */
+  invln2_32 = {{0x40471547, 0x652b82fe}}, /* 4.61662413084468283841e+01 */
+  ln2_32hi =  {{0x3f962e42, 0xfee00000}}, /* 2.16608493865351192653e-02 */
+  ln2_32lo =  {{0x3d9a39ef, 0x35793c76}}, /* 5.96317165397058656257e-12 */
+/* t2-t5 terms used for polynomial computation */
+  t2 = {{0x3fc55555, 0x55548f7c}}, /* 1.6666666666526086527e-1 */
+  t3 = {{0x3fa55555, 0x55545d4e}}, /* 4.1666666666226079285e-2 */
+  t4 = {{0x3f811115, 0xb7aa905e}}, /* 8.3333679843421958056e-3 */
+  t5 = {{0x3f56c172, 0x8d739765}}, /* 1.3888949086377719040e-3 */
+/* maximum value for x to not overflow */
+  threshold1 = {{0x40862E42, 0xFEFA39EF}}, /* 7.09782712893383973096e+02 */
+/* maximum value for -x to not underflow */
+  threshold2 = {{0x40874910, 0xD52D3051}}, /* 7.45133219101941108420e+02 */
+/* scaling factor used when result near zero*/
+  twom54 = {{0x3c900000, 0x00000000}}; /* 5.55111512312578270212e-17 */
+
+#else
+#ifdef LITTLE_ENDI
+
+static const mynumber 
+/* Following three values used to scale x to primary range */
+  invln2_32 = {{0x652b82fe, 0x40471547}}, /* 4.61662413084468283841e+01 */
+  ln2_32hi =  {{0xfee00000, 0x3f962e42}}, /* 2.16608493865351192653e-02 */
+  ln2_32lo =  {{0x35793c76, 0x3d9a39ef}}, /* 5.96317165397058656257e-12 */
+/* t2-t5 terms used for polynomial computation */
+  t2 = {{0x55548f7c, 0x3fc55555}}, /* 1.6666666666526086527e-1 */
+  t3 = {{0x55545d4e, 0x3fa55555}}, /* 4.1666666666226079285e-2 */
+  t4 = {{0xb7aa905e, 0x3f811115}}, /* 8.3333679843421958056e-3 */
+  t5 = {{0x8d739765, 0x3f56c172}}, /* 1.3888949086377719040e-3 */
+/* maximum value for x to not overflow */
+  threshold1 = {{0xFEFA39EF, 0x40862E42}}, /* 7.09782712893383973096e+02 */
+/* maximum value for -x to not underflow */
+  threshold2 = {{0xD52D3051, 0x40874910}}, /* 7.45133219101941108420e+02 */
+/* scaling factor used when result near zero*/
+  twom54 = {{0x00000000, 0x3c900000}}; /* 5.55111512312578270212e-17 */
+
+#endif
+#endif
diff --git a/sysdeps/ieee754/dbl-64/slowexp.c b/sysdeps/ieee754/dbl-64/slowexp.c
deleted file mode 100644
index e8fa2e2..0000000
--- a/sysdeps/ieee754/dbl-64/slowexp.c
+++ /dev/null
@@ -1,86 +0,0 @@ 
-/*
- * IBM Accurate Mathematical Library
- * written by International Business Machines Corp.
- * Copyright (C) 2001-2017 Free Software Foundation, Inc.
- *
- * This program is free software; you can redistribute it and/or modify
- * it under the terms of the GNU Lesser General Public License as published by
- * the Free Software Foundation; either version 2.1 of the License, or
- * (at your option) any later version.
- *
- * This program 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 Lesser General Public License for more details.
- *
- * You should have received a copy of the GNU Lesser General Public License
- * along with this program; if not, see <http://www.gnu.org/licenses/>.
- */
-/**************************************************************************/
-/*  MODULE_NAME:slowexp.c                                                 */
-/*                                                                        */
-/*  FUNCTION:slowexp                                                      */
-/*                                                                        */
-/*  FILES NEEDED:mpa.h                                                    */
-/*               mpa.c mpexp.c                                            */
-/*                                                                        */
-/*Converting from double precision to Multi-precision and calculating     */
-/* e^x                                                                    */
-/**************************************************************************/
-#include <math_private.h>
-
-#include <stap-probe.h>
-
-#ifndef USE_LONG_DOUBLE_FOR_MP
-# include "mpa.h"
-void __mpexp (mp_no *x, mp_no *y, int p);
-#endif
-
-#ifndef SECTION
-# define SECTION
-#endif
-
-/*Converting from double precision to Multi-precision and calculating  e^x */
-double
-SECTION
-__slowexp (double x)
-{
-#ifndef USE_LONG_DOUBLE_FOR_MP
-  double w, z, res, eps = 3.0e-26;
-  int p;
-  mp_no mpx, mpy, mpz, mpw, mpeps, mpcor;
-
-  /* Use the multiple precision __MPEXP function to compute the exponential
-     First at 144 bits and if it is not accurate enough, at 768 bits.  */
-  p = 6;
-  __dbl_mp (x, &mpx, p);
-  __mpexp (&mpx, &mpy, p);
-  __dbl_mp (eps, &mpeps, p);
-  __mul (&mpeps, &mpy, &mpcor, p);
-  __add (&mpy, &mpcor, &mpw, p);
-  __sub (&mpy, &mpcor, &mpz, p);
-  __mp_dbl (&mpw, &w, p);
-  __mp_dbl (&mpz, &z, p);
-  if (w == z)
-    {
-      /* Track how often we get to the slow exp code plus
-	 its input/output values.  */
-      LIBC_PROBE (slowexp_p6, 2, &x, &w);
-      return w;
-    }
-  else
-    {
-      p = 32;
-      __dbl_mp (x, &mpx, p);
-      __mpexp (&mpx, &mpy, p);
-      __mp_dbl (&mpy, &res, p);
-
-      /* Track how often we get to the uber-slow exp code plus
-	 its input/output values.  */
-      LIBC_PROBE (slowexp_p32, 2, &x, &res);
-      return res;
-    }
-#else
-  return (double) __ieee754_expl((long double)x);
-#endif
-}
diff --git a/sysdeps/powerpc/power4/fpu/Makefile b/sysdeps/powerpc/power4/fpu/Makefile
index e17d32f..ded9976 100644
--- a/sysdeps/powerpc/power4/fpu/Makefile
+++ b/sysdeps/powerpc/power4/fpu/Makefile
@@ -3,5 +3,4 @@ 
 ifeq ($(subdir),math)
 CFLAGS-mpa.c += --param max-unroll-times=4 -funroll-loops -fpeel-loops
 CPPFLAGS-slowpow.c += -DUSE_LONG_DOUBLE_FOR_MP=1
-CPPFLAGS-slowexp.c += -DUSE_LONG_DOUBLE_FOR_MP=1
 endif
diff --git a/sysdeps/x86_64/fpu/multiarch/Makefile b/sysdeps/x86_64/fpu/multiarch/Makefile
index d660552..4051232 100644
--- a/sysdeps/x86_64/fpu/multiarch/Makefile
+++ b/sysdeps/x86_64/fpu/multiarch/Makefile
@@ -10,7 +10,7 @@  libm-sysdep_routines += s_ceil-sse4_1 s_ceilf-sse4_1 s_floor-sse4_1 \
 
 libm-sysdep_routines += e_exp-fma e_log-fma e_pow-fma s_atan-fma \
 			e_asin-fma e_atan2-fma s_sin-fma s_tan-fma \
-			mplog-fma mpa-fma slowexp-fma slowpow-fma \
+			mplog-fma mpa-fma slowpow-fma \
 			sincos32-fma doasin-fma dosincos-fma \
 			halfulp-fma mpexp-fma \
 			mpatan2-fma mpatan-fma mpsqrt-fma mptan-fma
@@ -32,7 +32,6 @@  CFLAGS-mpsqrt-fma.c = -mfma -mavx2
 CFLAGS-mptan-fma.c = -mfma -mavx2
 CFLAGS-s_atan-fma.c = -mfma -mavx2
 CFLAGS-sincos32-fma.c = -mfma -mavx2
-CFLAGS-slowexp-fma.c = -mfma -mavx2
 CFLAGS-slowpow-fma.c = -mfma -mavx2
 CFLAGS-s_sin-fma.c = -mfma -mavx2
 CFLAGS-s_tan-fma.c = -mfma -mavx2
@@ -42,7 +41,7 @@  libm-sysdep_routines += e_expf-fma
 
 libm-sysdep_routines += e_exp-fma4 e_log-fma4 e_pow-fma4 s_atan-fma4 \
 			e_asin-fma4 e_atan2-fma4 s_sin-fma4 s_tan-fma4 \
-			mplog-fma4 mpa-fma4 slowexp-fma4 slowpow-fma4 \
+			mplog-fma4 mpa-fma4 slowpow-fma4 \
 			sincos32-fma4 doasin-fma4 dosincos-fma4 \
 			halfulp-fma4 mpexp-fma4 \
 			mpatan2-fma4 mpatan-fma4 mpsqrt-fma4 mptan-fma4
@@ -64,14 +63,13 @@  CFLAGS-mpsqrt-fma4.c = -mfma4
 CFLAGS-mptan-fma4.c = -mfma4
 CFLAGS-s_atan-fma4.c = -mfma4
 CFLAGS-sincos32-fma4.c = -mfma4
-CFLAGS-slowexp-fma4.c = -mfma4
 CFLAGS-slowpow-fma4.c = -mfma4
 CFLAGS-s_sin-fma4.c = -mfma4
 CFLAGS-s_tan-fma4.c = -mfma4
 
 libm-sysdep_routines += e_exp-avx e_log-avx s_atan-avx \
 			e_atan2-avx s_sin-avx s_tan-avx \
-			mplog-avx mpa-avx slowexp-avx \
+			mplog-avx mpa-avx \
 			mpexp-avx
 
 CFLAGS-e_atan2-avx.c = -msse2avx -DSSE2AVX
@@ -82,7 +80,6 @@  CFLAGS-mpexp-avx.c = -msse2avx -DSSE2AVX
 CFLAGS-mplog-avx.c = -msse2avx -DSSE2AVX
 CFLAGS-s_atan-avx.c = -msse2avx -DSSE2AVX
 CFLAGS-s_sin-avx.c = -msse2avx -DSSE2AVX
-CFLAGS-slowexp-avx.c = -msse2avx -DSSE2AVX
 CFLAGS-s_tan-avx.c = -msse2avx -DSSE2AVX
 endif
 
diff --git a/sysdeps/x86_64/fpu/multiarch/e_exp-avx.c b/sysdeps/x86_64/fpu/multiarch/e_exp-avx.c
index ee5dd6d..afd9174 100644
--- a/sysdeps/x86_64/fpu/multiarch/e_exp-avx.c
+++ b/sysdeps/x86_64/fpu/multiarch/e_exp-avx.c
@@ -1,6 +1,5 @@ 
 #define __ieee754_exp __ieee754_exp_avx
 #define __exp1 __exp1_avx
-#define __slowexp __slowexp_avx
 #define SECTION __attribute__ ((section (".text.avx")))
 
 #include <sysdeps/ieee754/dbl-64/e_exp.c>
diff --git a/sysdeps/x86_64/fpu/multiarch/e_exp-fma.c b/sysdeps/x86_64/fpu/multiarch/e_exp-fma.c
index 6e0fdb7..765b1b9 100644
--- a/sysdeps/x86_64/fpu/multiarch/e_exp-fma.c
+++ b/sysdeps/x86_64/fpu/multiarch/e_exp-fma.c
@@ -1,6 +1,5 @@ 
 #define __ieee754_exp __ieee754_exp_fma
 #define __exp1 __exp1_fma
-#define __slowexp __slowexp_fma
 #define SECTION __attribute__ ((section (".text.fma")))
 
 #include <sysdeps/ieee754/dbl-64/e_exp.c>
diff --git a/sysdeps/x86_64/fpu/multiarch/e_exp-fma4.c b/sysdeps/x86_64/fpu/multiarch/e_exp-fma4.c
index ae6eb67..9ac7aca 100644
--- a/sysdeps/x86_64/fpu/multiarch/e_exp-fma4.c
+++ b/sysdeps/x86_64/fpu/multiarch/e_exp-fma4.c
@@ -1,6 +1,5 @@ 
 #define __ieee754_exp __ieee754_exp_fma4
 #define __exp1 __exp1_fma4
-#define __slowexp __slowexp_fma4
 #define SECTION __attribute__ ((section (".text.fma4")))
 
 #include <sysdeps/ieee754/dbl-64/e_exp.c>
diff --git a/sysdeps/x86_64/fpu/multiarch/slowexp-avx.c b/sysdeps/x86_64/fpu/multiarch/slowexp-avx.c
deleted file mode 100644
index d01c6d7..0000000
--- a/sysdeps/x86_64/fpu/multiarch/slowexp-avx.c
+++ /dev/null
@@ -1,9 +0,0 @@ 
-#define __slowexp __slowexp_avx
-#define __add __add_avx
-#define __dbl_mp __dbl_mp_avx
-#define __mpexp __mpexp_avx
-#define __mul __mul_avx
-#define __sub __sub_avx
-#define SECTION __attribute__ ((section (".text.avx")))
-
-#include <sysdeps/ieee754/dbl-64/slowexp.c>
diff --git a/sysdeps/x86_64/fpu/multiarch/slowexp-fma.c b/sysdeps/x86_64/fpu/multiarch/slowexp-fma.c
deleted file mode 100644
index 6fffca1..0000000
--- a/sysdeps/x86_64/fpu/multiarch/slowexp-fma.c
+++ /dev/null
@@ -1,9 +0,0 @@ 
-#define __slowexp __slowexp_fma
-#define __add __add_fma
-#define __dbl_mp __dbl_mp_fma
-#define __mpexp __mpexp_fma
-#define __mul __mul_fma
-#define __sub __sub_fma
-#define SECTION __attribute__ ((section (".text.fma")))
-
-#include <sysdeps/ieee754/dbl-64/slowexp.c>
diff --git a/sysdeps/x86_64/fpu/multiarch/slowexp-fma4.c b/sysdeps/x86_64/fpu/multiarch/slowexp-fma4.c
deleted file mode 100644
index 3bcde84..0000000
--- a/sysdeps/x86_64/fpu/multiarch/slowexp-fma4.c
+++ /dev/null
@@ -1,9 +0,0 @@ 
-#define __slowexp __slowexp_fma4
-#define __add __add_fma4
-#define __dbl_mp __dbl_mp_fma4
-#define __mpexp __mpexp_fma4
-#define __mul __mul_fma4
-#define __sub __sub_fma4
-#define SECTION __attribute__ ((section (".text.fma4")))
-
-#include <sysdeps/ieee754/dbl-64/slowexp.c>