diff options
| author | H.J. Lu <hongjiu.lu@intel.com> | 2011-05-25 13:42:58 +0000 |
|---|---|---|
| committer | H.J. Lu <hjl@gcc.gnu.org> | 2011-05-25 06:42:58 -0700 |
| commit | 74838de312b5e8abae7c8482d8d7da2268cc9624 (patch) | |
| tree | 76212b8d0661bb78a1a0eb60f0cebf288a991c95 /gcc/doc | |
| parent | d24ad7d6e9397bc1514fe39e9855b0ac6a5489a2 (diff) | |
| download | gcc-74838de312b5e8abae7c8482d8d7da2268cc9624.zip gcc-74838de312b5e8abae7c8482d8d7da2268cc9624.tar.gz gcc-74838de312b5e8abae7c8482d8d7da2268cc9624.tar.bz2 | |
Implement x86 pause intrinsic.
gcc/
2011-05-25 H.J. Lu <hongjiu.lu@intel.com>
* config/i386/i386.c (ix86_builtins): Add IX86_BUILTIN_PAUSE.
(bdesc_special_args): Add pause intrinsic.
* config/i386/i386.md (UNSPEC_PAUSE): New.
(pause): Likewise.
(*pause): Likewise.
* config/i386/ia32intrin.h (__pause): Likewise.
* doc/extend.texi (X86 Built-in Functions): Add documentation for
pause intrinsic.
gcc/testsuite/
2011-05-25 H.J. Lu <hongjiu.lu@intel.com>
* gcc.target/i386/pause-1.c: New.
From-SVN: r174197
Diffstat (limited to 'gcc/doc')
| -rw-r--r-- | gcc/doc/extend.texi | 7 |
1 files changed, 7 insertions, 0 deletions
diff --git a/gcc/doc/extend.texi b/gcc/doc/extend.texi index b5702db..bd2f080 100644 --- a/gcc/doc/extend.texi +++ b/gcc/doc/extend.texi @@ -8695,6 +8695,13 @@ __float128 __builtin_fabsq (__float128) __float128 __builtin_copysignq (__float128, __float128) @end smallexample +The following built-in function is always available. + +@table @code +@item void __builtin_ia32_pause (void) +Generates the @code{pause} machine instruction with full memory barrier. +@end table + The following floating point built-in functions are made available in the 64-bit mode. |