[glibc] Remove unused floating-point configuration from gmp-impl.h.

[glibc] Remove unused floating-point configuration from gmp-impl.h.

[Joseph Myers]

https://sourceware.org/git/gitweb.cgi?p=glibc.git;h=dbb188dd87ffdbf0ca3d9cd118ad4176439fb294

commit dbb188dd87ffdbf0ca3d9cd118ad4176439fb294
Author: Joseph Myers <joseph@codesourcery.com>
Date:   Tue Apr 28 15:05:09 2020 +0000

    Remove unused floating-point configuration from gmp-impl.h.
    
    This patch removes the IEEE_DOUBLE_BIG_ENDIAN and
    IEEE_DOUBLE_MIXED_ENDIAN macros from gmp-impl.h and gmp-mparam.h, and
    the ieee_double_extract union from gmp-impl.h.  The macros were used
    only in defining the union, which was used nowhere in glibc.  As GMP's
    gmp-impl.h is over 5000 lines, the file in glibc is so far from the
    GMP version that it doesn't seem to make sense to keep things there
    that are not relevant in glibc.  (I expect there is plenty more in the
    header after this patch that is also not relevant in glibc and can be
    cleaned up later.)
    
    Tested with build-many-glibcs.py that installed stripped shared
    libraries are unchanged by this patch.

Diff:
---
 stdlib/gmp-impl.h               | 50 -----------------------------------------
 sysdeps/x86_64/x32/gmp-mparam.h |  2 --
 2 files changed, 52 deletions(-)

diff --git a/stdlib/gmp-impl.h b/stdlib/gmp-impl.h
index 25193e6726..0c6aa30a30 100644
--- a/stdlib/gmp-impl.h
+++ b/stdlib/gmp-impl.h
@@ -319,53 +319,3 @@ extern void impn_sqr_n_basecase _PROTO ((mp_ptr prodp, mp_srcptr up,
 extern void impn_sqr_n _PROTO ((mp_ptr prodp, mp_srcptr up, mp_size_t size,
 				mp_ptr tspace))
      attribute_hidden;
-
-
-
-#ifndef IEEE_DOUBLE_BIG_ENDIAN
-#define IEEE_DOUBLE_BIG_ENDIAN 1
-#endif
-
-#ifndef IEEE_DOUBLE_MIXED_ENDIAN
-#define IEEE_DOUBLE_MIXED_ENDIAN 0
-#endif
-
-#if IEEE_DOUBLE_MIXED_ENDIAN
-union ieee_double_extract
-{
-  struct
-    {
-      unsigned int manh:20;
-      unsigned int exp:11;
-      unsigned int sig:1;
-      unsigned int manl:32;
-    } s;
-  double d;
-};
-#else
-#if IEEE_DOUBLE_BIG_ENDIAN
-union ieee_double_extract
-{
-  struct
-    {
-      unsigned int sig:1;
-      unsigned int exp:11;
-      unsigned int manh:20;
-      unsigned int manl:32;
-    } s;
-  double d;
-};
-#else
-union ieee_double_extract
-{
-  struct
-    {
-      unsigned int manl:32;
-      unsigned int manh:20;
-      unsigned int exp:11;
-      unsigned int sig:1;
-    } s;
-  double d;
-};
-#endif
-#endif
diff --git a/sysdeps/x86_64/x32/gmp-mparam.h b/sysdeps/x86_64/x32/gmp-mparam.h
index f2d9782eb1..b0804d4f86 100644
--- a/sysdeps/x86_64/x32/gmp-mparam.h
+++ b/sysdeps/x86_64/x32/gmp-mparam.h
@@ -29,5 +29,3 @@ along with the GNU MP Library; see the file COPYING.LIB.  If not, see
 #define BITS_PER_INT 32
 #define BITS_PER_SHORTINT 16
 #define BITS_PER_CHAR 8
-
-#define IEEE_DOUBLE_BIG_ENDIAN 0