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Add BSWAP64 macro.

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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
This commit is contained in:
Robert Haas
2015-10-08 13:01:36 -04:00
parent 1e35319861
commit c171818b27
7 changed files with 97 additions and 10 deletions
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24
configure vendored
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@ -11258,6 +11258,30 @@ 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; }