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[SystemZ] Update README 

We now use MVST, CLST and SRST for the obvious cases.

llvm-svn: 188781
This commit is contained in:
Richard Sandiford 2013-08-20 09:40:35 +00:00
parent 6f6d55161b
commit 2bf7b8cc4e
1 changed files with 2 additions and 4 deletions
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6
llvm/lib/Target/SystemZ/README.txt
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@ -73,10 +73,8 @@ Likewise memcmp and CLC. MVCLE and CLCLE could be useful too.
--
We don't optimize string operations.
MVST, CLST, SRST and CUSE could be useful here. Some of the TRANSLATE
family might be too, although they are probably more difficult to exploit.
We don't use CUSE or the TRANSLATE family of instructions for string
operations. The TRANSLATE ones are probably more difficult to exploit.
--