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* [multiprecision-builtins] Added missing builtin __builtin_{add,sub}cb for ↵Michael Gottesman2013-06-181-0/+38
| | | | | | | | | | | | | | {add,sub} with carry for bytes. I have had several people ask me about why this builtin was not available in clang (since it seems like a logical conclusion). This patch implements said builtins. Relevant tests are included as well. I also updated the Clang language extension reference. rdar://14192664. llvm-svn: 184227
* Multiprecision subtraction builtins.Michael Gottesman2013-01-141-0/+73
| | | | | | We lower these into 2x chained usub.with.overflow intrinsics. llvm-svn: 172476
* clang/test/CodeGen/builtins-multiprecision.c: Enhance for each test to run ↵NAKAMURA Takumi2013-01-131-10/+13
| | | | | | on theree targets, i686, amd64, win64. llvm-svn: 172344
* Fixed spelling of test name: builtins-multipercision.c => ↵Michael Gottesman2013-01-131-0/+74
builtins-multiprecision.c. llvm-svn: 172343
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