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Add a Thumb readme entry.

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git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@75173 91177308-0d34-0410-b5e6-96231b3b80d8
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Evan Cheng 2009-07-09 20:50:52 +00:00
parent cba962dd6b
commit 6dded67b0d
1 changed files with 6 additions and 0 deletions
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6
lib/Target/ARM/README-Thumb.txt
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@ -226,3 +226,9 @@ etc. Almost all Thumb instructions clobber condition code.
//===---------------------------------------------------------------------===//
Add ldmia, stmia support.
//===---------------------------------------------------------------------===//
Thumb load / store address mode offsets are scaled. The values kept in the
instruction operands are pre-scale values. This probably ought to be changed
to avoid extra work when we convert Thumb2 instructions to Thumb1 instructions.