tree dfe2677f56e191e4ac8bd8b9d2b11ea25334d1ac
parent 781f1bd132ec90d24ddde74d57a37f6619533517
author cborntra <cborntra@8f6e269a-dfd6-0310-a8e1-e2731360e62c> 1383860248 +0000
committer cborntra <cborntra@8f6e269a-dfd6-0310-a8e1-e2731360e62c> 1383860248 +0000

Fix Bug 327284. The condition code of risbg was not correct. 
This instruction might be used by by gcc for masking out bits,
e.g. code like 
 n &= 3;
  if (n == 0)

might result in 
        risbg   %r4,%r4,62,128+63,0
        je      <target>

The old code set the condition code depending on the operand before
masking. Fix it. This patch also indicates that we need test suite
coverage for risbg and friends.


git-svn-id: svn://svn.valgrind.org/vex/trunk@2798 8f6e269a-dfd6-0310-a8e1-e2731360e62c