Displaying 1 result from an estimated 1 matches for "0b1bbd26".
2015 Jan 22
3
[LLVMdev] X86TargetLowering::LowerToBT
Is that even a valid instruction? I thought TEST only took 32-bit immediates.
Fiona
> On Jan 22, 2015, at 2:48 PM, Chris Sears <chris.sears at gmail.com> wrote:
>
> The problem is that REX TEST reg,#(1<<37) is 10 bytes vs 5 bytes for REX BT reg,37.
> That's a large space penalty to pay for a possible partial update stall.
>
> So the idea of generating BT for