c9539f957f
[PowerPC] Define XL-compatible macros only for AIX and Linux
...
Since XLC only ever shipped on PowerPC AIX and Linux, it is not reasonable to
provide the compatibility macros on any target other than those two. This patch
restricts those macros to AIX/Linux.
Differential revision: https://reviews.llvm.org/D110213
2021-09-29 06:14:45 -05:00
e4902e69e9
[PowerPC] Fix return type of XL compat CAS
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`__compare_and_swap*` should return `i32` rather than `i1`.
Reviewed By: jsji
Differential Revision: https://reviews.llvm.org/D107077
2021-07-29 14:49:26 +00:00
e4ed93cb25
[PowerPC] Implement XL compatible behavior of __compare_and_swap
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According to https://www.ibm.com/docs/en/xl-c-and-cpp-aix/16.1?topic=functions-compare-swap-compare-swaplp
XL's `__compare_and_swap` has a weird behavior that
> In either case, the contents of the memory location specified by addr are copied into the memory location specified by old_val_addr.
(unlike c11 `atomic_compare_exchange` specified in http://www.open-std.org/jtc1/sc22/wg14/www/docs/n1548.pdf )
This patch let clang's implementation follow this behavior.
Reviewed By: jsji
Differential Revision: https://reviews.llvm.org/D106344
2021-07-23 01:16:02 +00:00
f3ef4f5bff
[PowerPC] Add XL compat __compare_and_swap builtins
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Prototype
int __compare_and_swap (volatile int* addr, int* old_val_addr, int
new_val);
int __compare_and_swaplp (volatile long* addr, long* old_val_addr, long
new_val);
Refer to
https://www.ibm.com/docs/en/xl-c-and-cpp-aix/16.1?topic=functions-compare-swap-compare-swaplp
Reviewed By: w2yehia
Differential Revision: https://reviews.llvm.org/D104837
2021-06-25 01:08:48 +00:00
Nemanja Ivanovic