ldbl-128ibm: Automatic replacing of _Float128 and L()

The ldbl-128ibm implementation of j0l, j1l, lgammal_r, and cbrtl, as
well as the tables used by expl were copied from ldbl-128.  However, the
original files used _Float128 for the type and L() for the literal
suffix.  This patch uses the following sed command to rewrite _Float128
as long double and L(x) as xL (for e_expl.c, e_j0l.c, e_j1l.c,
e_lgammal_r.c, and t_expl.h):

  sed -i <filename> \
    -e "/^#define _Float128 long double/d" \
    -e "/^#define L(x) x ## L/d" \
    -e "/L(/s/)/L/" \
    -e "/L(/s/L(//" \
    -e "s/_Float128/long double/g"

For sysdeps/ieee754/ldbl-128ibm/s_cbrtl.c, this sed command incorrectly
replaces a few occurrences of L(), so the following command is used
instead:

  sed -i sysdeps/ieee754/ldbl-128ibm/s_cbrtl.c \
    -e "/^#define _Float128 long double/d" \
    -e "/^#define L(x) x ## L/d" \
    -e "s/L(0\.3\{40\})/0.3333333333333333333333333333333333333333L/" \
    -e "s/L(3\.7568280825958912391243e-1)/3.7568280825958912391243e-1L/" \
    -e "/L(/s/)/L/" \
    -e "/L(/s/L(//" \
    -e "s/_Float128/long double/g"

Tested for powerpc64le with patched [1] and unpatched gcc.

[1] https://gcc.gnu.org/ml/gcc-patches/2017-08/msg01028.html

	* sysdeps/ieee754/ldbl-128ibm/e_expl.c: Remove definitions of
	_Float128 and L().
	* sysdeps/ieee754/ldbl-128ibm/e_j0l.c: Remove definitions of
	_Float128 and L(). Replace _Float128 with long double and L(x)
	with xL, throughout the file.
	* sysdeps/ieee754/ldbl-128ibm/e_j1l.c: Likewise.
	* sysdeps/ieee754/ldbl-128ibm/e_lgammal_r.c: Likewise.
	* sysdeps/ieee754/ldbl-128ibm/s_cbrtl.c: Likewise.
	* sysdeps/ieee754/ldbl-128ibm/t_expl.h: Likewise.

ChangeLog

@@ -1,3 +1,15 @@
+2017-09-21  Gabriel F. T. Gomes  <gabriel@inconstante.eti.br>
+
+	* sysdeps/ieee754/ldbl-128ibm/e_expl.c: Remove definitions of
+	_Float128 and L().
+	* sysdeps/ieee754/ldbl-128ibm/e_j0l.c: Remove definitions of
+	_Float128 and L(). Replace _Float128 with long double and L(x)
+	with xL, throughout the file.
+	* sysdeps/ieee754/ldbl-128ibm/e_j1l.c: Likewise.
+	* sysdeps/ieee754/ldbl-128ibm/e_lgammal_r.c: Likewise.
+	* sysdeps/ieee754/ldbl-128ibm/s_cbrtl.c: Likewise.
+	* sysdeps/ieee754/ldbl-128ibm/t_expl.h: Likewise.
+
 2017-09-21  Gabriel F. T. Gomes  <gabriel@inconstante.eti.br>
 
 	* sysdeps/ieee754/ldbl-128ibm/e_expl.c: Include tables from

sysdeps/ieee754/ldbl-128ibm/e_expl.c

@@ -66,8 +66,6 @@
 #include <inttypes.h>
 #include <math_private.h>
 
-#define _Float128 long double
-#define L(x) x ## L
 
 #include "t_expl.h"
 

sysdeps/ieee754/ldbl-128ibm/s_cbrtl.c

@@ -19,24 +19,22 @@
 
 /* This file was copied from sysdeps/ieee754/ldbl-128/e_j0l.c.  */
 
-#define _Float128 long double
-#define L(x) x ## L
 
 #include <math_ldbl_opt.h>
 #include <math.h>
 #include <math_private.h>
 
-static const _Float128 CBRT2 = L(1.259921049894873164767210607278228350570251);
-static const _Float128 CBRT4 = L(1.587401051968199474751705639272308260391493);
-static const _Float128 CBRT2I = L(0.7937005259840997373758528196361541301957467);
-static const _Float128 CBRT4I = L(0.6299605249474365823836053036391141752851257);
+static const long double CBRT2 = 1.259921049894873164767210607278228350570251L;
+static const long double CBRT4 = 1.587401051968199474751705639272308260391493L;
+static const long double CBRT2I = 0.7937005259840997373758528196361541301957467L;
+static const long double CBRT4I = 0.6299605249474365823836053036391141752851257L;
 
 
-_Float128
-__cbrtl (_Float128 x)
+long double
+__cbrtl (long double x)
 {
   int e, rem, sign;
-  _Float128 z;
+  long double z;
 
   if (!isfinite (x))
     return x + x;
@@ -58,11 +56,11 @@ __cbrtl (_Float128 x)
 
   /* Approximate cube root of number between .5 and 1,
      peak relative error = 1.2e-6  */
-  x = ((((L(1.3584464340920900529734e-1) * x
-	  - L(6.3986917220457538402318e-1)) * x
-	 + L(1.2875551670318751538055e0)) * x
-	- L(1.4897083391357284957891e0)) * x
-       + L(1.3304961236013647092521e0)) * x + L(3.7568280825958912391243e-1);
+  x = ((((1.3584464340920900529734e-1L * x
+	  - 6.3986917220457538402318e-1L) * x
+	 + 1.2875551670318751538055e0L) * x
+	- 1.4897083391357284957891e0L) * x
+       + 1.3304961236013647092521e0L) * x + 3.7568280825958912391243e-1L;
 
   /* exponent divided by 3 */
   if (e >= 0)
@@ -92,9 +90,9 @@ __cbrtl (_Float128 x)
   x = __ldexpl (x, e);
 
   /* Newton iteration */
-  x -= (x - (z / (x * x))) * L(0.3333333333333333333333333333333333333333);
-  x -= (x - (z / (x * x))) * L(0.3333333333333333333333333333333333333333);
-  x -= (x - (z / (x * x))) * L(0.3333333333333333333333333333333333333333);
+  x -= (x - (z / (x * x))) * 0.3333333333333333333333333333333333333333L;
+  x -= (x - (z / (x * x))) * 0.3333333333333333333333333333333333333333L;
+  x -= (x - (z / (x * x))) * 0.3333333333333333333333333333333333333333L;
 
   if (sign < 0)
     x = -x;