Add BSWAP64 macro.

This is like BSWAP32, but for 64-bit values.  Since we've got two of
them now and they have use cases (like sortsupport) beyond CRCs, move
the definitions to their own header file.

Peter Geoghegan

1 files changed, 24 insertions, 0 deletions

diff --git a/configure b/configure
index 99ef10f0f7..b771a83555 100755
--- a/configure
+++ b/configure
@@ -11259,6 +11259,30 @@ if test x"$pgac_cv__builtin_bswap32" = xyes ; then
 $as_echo "#define HAVE__BUILTIN_BSWAP32 1" >>confdefs.h
 
 fi
+{ $as_echo "$as_me:${as_lineno-$LINENO}: checking for __builtin_bswap64" >&5
+$as_echo_n "checking for __builtin_bswap64... " >&6; }
+if ${pgac_cv__builtin_bswap64+:} false; then :
+  $as_echo_n "(cached) " >&6
+else
+  cat confdefs.h - <<_ACEOF >conftest.$ac_ext
+/* end confdefs.h.  */
+static unsigned long int x = __builtin_bswap64(0xaabbccddeeff0011);
+
+_ACEOF
+if ac_fn_c_try_compile "$LINENO"; then :
+  pgac_cv__builtin_bswap64=yes
+else
+  pgac_cv__builtin_bswap64=no
+fi
+rm -f core conftest.err conftest.$ac_objext conftest.$ac_ext
+fi
+{ $as_echo "$as_me:${as_lineno-$LINENO}: result: $pgac_cv__builtin_bswap64" >&5
+$as_echo "$pgac_cv__builtin_bswap64" >&6; }
+if test x"$pgac_cv__builtin_bswap64" = xyes ; then
+
+$as_echo "#define HAVE__BUILTIN_BSWAP64 1" >>confdefs.h
+
+fi
 { $as_echo "$as_me:${as_lineno-$LINENO}: checking for __builtin_constant_p" >&5
 $as_echo_n "checking for __builtin_constant_p... " >&6; }
 if ${pgac_cv__builtin_constant_p+:} false; then :