Displaying 2 results from an estimated 2 matches for "x86tarigetlow".
2015 Jan 23
2
[LLVMdev] X86TarIgetLowering::LowerToBT
> icc generates testq for 0-30 and btq for 31-63.
> That seems like a small bug in the bit 31 case.
You can’t use testq for bit 31, because the immediate gets sign-extended. You *can* use the 32b form, of course.
2015 Jan 23
3
[LLVMdev] X86TarIgetLowering::LowerToBT
I’ll be happy to run it for you. Do you want Intel64, x86 or both? The Intel compiler doesn’t have a –Oz option. It has –Os and –O[123].
Also, FWIW, one of the Intel compiler experts on BT will comment on this thread, and on our rules for BT usage later this afternoon.
Kevin B. Smith
From: llvmdev-bounces at cs.uiuc.edu [mailto:llvmdev-bounces at cs.uiuc.edu] On Behalf Of Chris Sears
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