The existing code looks OK to me -- there's no need to call gen_set_CF_bit31() early because the inputs t0 and t1 to gen_thumb2_data_op() should always be distinct TCG values, and so gen_thumb2_data_op() will never trash t1. (There was a bug in this area involving ORN, but that was fixed in rev 29501f1, and I can see from your patch that you have that fix.)
Can you clarify which exact instruction, input data and output data case this patch is intended to fix, please? -- You received this bug notification because you are a member of qemu- devel-ml, which is subscribed to QEMU. https://bugs.launchpad.net/bugs/874038 Title: ARM thumb2 does not propogate carry flag properly Status in QEMU: New Bug description: information on carry flag is lost if gen_set_CF_bit31(t1) is called after logic operation. To manage notifications about this bug go to: https://bugs.launchpad.net/qemu/+bug/874038/+subscriptions
