[2.26 COMMITTED 5/5] Remove conditional on LDBL_MANT_DIG from e_lgammal_r.c

[Gabriel F. T. Gomes]

The IEEE 754 implementation of lgammal in sysdeps/ieee754/ldbl-128/ used
to be shared by IBM's implementation in sysdeps/ieee754/ldbl-128ibm/ (by
an inclusion of the source file).  In order for the algorithm to work
for IBM's implementation, a check for LDBL_MANT_DIG was required. Since
the source file is no longer shared, the requirement for the check is
gone.  This patch removes the conditionals.

Tested for powerpc64le and s390x.

	* sysdeps/ieee754/ldbl-128/e_lgammal_r.c (__ieee754_lgammal_r):
	Remove conditionals on LDBL_MANT_DIG.
	* sysdeps/ieee754/ldbl-128ibm/e_lgammal_r.c
	(__ieee754_lgammal_r): Likewise.

(cherry picked from commit 9ac3c68218b5bcbc40ae9e27b0b13f5e1c81f84c)
---
 ChangeLog                                 | 7 +++++++
 sysdeps/ieee754/ldbl-128/e_lgammal_r.c    | 6 +-----
 sysdeps/ieee754/ldbl-128ibm/e_lgammal_r.c | 6 +-----
 3 files changed, 9 insertions(+), 10 deletions(-)

diff --git a/ChangeLog b/ChangeLog
index 21e923c2f7..846601bc21 100644
--- a/ChangeLog
+++ b/ChangeLog
@@ -1,5 +1,12 @@
 2017-09-21  Gabriel F. T. Gomes  <gabriel@inconstante.eti.br>
 
+	* sysdeps/ieee754/ldbl-128/e_lgammal_r.c (__ieee754_lgammal_r):
+	Remove conditionals on LDBL_MANT_DIG.
+	* sysdeps/ieee754/ldbl-128ibm/e_lgammal_r.c
+	(__ieee754_lgammal_r): Likewise.
+
+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
diff --git a/sysdeps/ieee754/ldbl-128/e_lgammal_r.c b/sysdeps/ieee754/ldbl-128/e_lgammal_r.c
index bef2601bce..a80c9eaf33 100644
--- a/sysdeps/ieee754/ldbl-128/e_lgammal_r.c
+++ b/sysdeps/ieee754/ldbl-128/e_lgammal_r.c
@@ -73,11 +73,7 @@
 #include <float.h>
 
 static const _Float128 PIL = L(3.1415926535897932384626433832795028841972E0);
-#if LDBL_MANT_DIG == 106
-static const _Float128 MAXLGM = L(0x5.d53649e2d469dbc1f01e99fd66p+1012);
-#else
 static const _Float128 MAXLGM = L(1.0485738685148938358098967157129705071571E4928);
-#endif
 static const _Float128 one = 1;
 static const _Float128 huge = LDBL_MAX;
 
@@ -777,7 +773,7 @@ __ieee754_lgammal_r (_Float128 x, int *signgamp)
 
   if (x < 0)
     {
-      if (x < -2 && x > (LDBL_MANT_DIG == 106 ? -48 : -50))
+      if (x < -2 && x > -50)
 	return __lgamma_negl (x, signgamp);
       q = -x;
       p = __floorl (q);
diff --git a/sysdeps/ieee754/ldbl-128ibm/e_lgammal_r.c b/sysdeps/ieee754/ldbl-128ibm/e_lgammal_r.c
index 474773e81d..f881b8c0a4 100644
--- a/sysdeps/ieee754/ldbl-128ibm/e_lgammal_r.c
+++ b/sysdeps/ieee754/ldbl-128ibm/e_lgammal_r.c
@@ -23,11 +23,7 @@
 #include <float.h>
 
 static const long double PIL = 3.1415926535897932384626433832795028841972E0L;
-#if LDBL_MANT_DIG == 106
 static const long double MAXLGM = 0x5.d53649e2d469dbc1f01e99fd66p+1012L;
-#else
-static const long double MAXLGM = 1.0485738685148938358098967157129705071571E4928L;
-#endif
 static const long double one = 1;
 static const long double huge = LDBL_MAX;
 
@@ -727,7 +723,7 @@ __ieee754_lgammal_r (long double x, int *signgamp)
 
   if (x < 0)
     {
-      if (x < -2 && x > (LDBL_MANT_DIG == 106 ? -48 : -50))
+      if (x < -2 && x > -48)
 	return __lgamma_negl (x, signgamp);
       q = -x;
       p = __floorl (q);
-- 
2.13.6