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Diffstat (limited to 'gcc/doc/cpp.texi')
| -rw-r--r-- | gcc/doc/cpp.texi | 8 |
1 files changed, 8 insertions, 0 deletions
diff --git a/gcc/doc/cpp.texi b/gcc/doc/cpp.texi index fe2a93bf59a..e6786cf8102 100644 --- a/gcc/doc/cpp.texi +++ b/gcc/doc/cpp.texi @@ -2179,6 +2179,14 @@ If GCC cannot determine the current date, it will emit a warning message (once per compilation) and @code{__TIMESTAMP__} will expand to @code{@w{"??? ??? ?? ??:??:?? ????"}}. +@item __GCC_HAVE_SYNC_COMPARE_AND_SWAP_1 +@itemx __GCC_HAVE_SYNC_COMPARE_AND_SWAP_2 +@itemx __GCC_HAVE_SYNC_COMPARE_AND_SWAP_4 +@itemx __GCC_HAVE_SYNC_COMPARE_AND_SWAP_8 +@itemx __GCC_HAVE_SYNC_COMPARE_AND_SWAP_16 +These macros are defined when the target processor supports atomic compare +and swap operations on operands 1, 2, 4, 8 or 16 bytes in length, respectively. + @end table @node System-specific Predefined Macros |