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[Patch AArch64] Add __ARM_FEATURE_ATOMICS 

This keeps coming up repeatedly and the ACLE has finally added
__ARM_FEATURE_ATOMICS for the LSE feature in GCC. This is now part of
the latest ACLE release
(https://developer.arm.com/docs/101028/latest/5-feature-test-macros)

I know it's late for GCC-9 but this is a simple macro which need not
wait  for another year.

Ok for trunk and to backport to all release branches ?

Tested with a simple build and a smoke test.

PR target/86538
* config/aarch64/aarch64-c.c (aarch64_update_cpp_builtins): Define
__ARM_FEATURE_ATOMICS

From-SVN: r270686
This commit is contained in:
Ramana Radhakrishnan 2019-04-30 11:22:11 +00:00 committed by Ramana Radhakrishnan
parent 95767c6597
commit abb3c64e76
2 changed files with 7 additions and 0 deletions
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gcc/ChangeLog
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@ -1,3 +1,9 @@
2019-04-30 Ramana Radhakrishnan <ramana.radhakrishnan@arm.com>
PR target/86538
* config/aarch64/aarch64-c.c (aarch64_update_cpp_builtins):
Define __ARM_FEATURE_ATOMICS
2019-04-30 Martin Liska <mliska@suse.cz>
* gimple-fold.c (gimple_fold_builtin_memory_op): Change endp

1
gcc/config/aarch64/aarch64-c.c
View File

@ -147,6 +147,7 @@ aarch64_update_cpp_builtins (cpp_reader *pfile)
builtin_define_with_int_value ("__ARM_FEATURE_SVE_BITS", bits);
}
aarch64_def_or_undef (TARGET_LSE, "__ARM_FEATURE_ATOMICS", pfile);
aarch64_def_or_undef (TARGET_AES, "__ARM_FEATURE_AES", pfile);
aarch64_def_or_undef (TARGET_SHA2, "__ARM_FEATURE_SHA2", pfile);
aarch64_def_or_undef (TARGET_SHA3, "__ARM_FEATURE_SHA3", pfile);