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LLVM backend for 6502
984ee65445
The C++ and C semantics of the compare_and_swap operations actually require us to return a boolean "success" value. In LLVM terms this means a second comparison of the output of "cmpxchg" against the input desired value. However, x86's "cmpxchg" instruction sets all flags for the comparison formed, so we can skip any secondary comparison. (N.b. this isn't true for cmpxchg8b/16b, which only set ZF). rdar://problem/13201607 git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@210523 91177308-0d34-0410-b5e6-96231b3b80d8 |
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| tools | ||
| unittests | ||
| utils | ||
| .arcconfig | ||
| .clang-format | ||
| .gitignore | ||
| CMakeLists.txt | ||
| CODE_OWNERS.TXT | ||
| configure | ||
| CREDITS.TXT | ||
| LICENSE.TXT | ||
| llvm.spec.in | ||
| LLVMBuild.txt | ||
| Makefile | ||
| Makefile.common | ||
| Makefile.config.in | ||
| Makefile.rules | ||
| README.txt | ||
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