[llvm-bugs] [Bug 44347] Hexagon cmplt instruction have incorrect assembly syntax

via llvm-bugs llvm-bugs at lists.llvm.org
Mon Jan 20 12:54:00 PST 2020


Krzysztof Parzyszek <kparzysz at quicinc.com> changed:

           What    |Removed                     |Added
         Resolution|---                         |INVALID
             Status|NEW                         |RESOLVED

--- Comment #1 from Krzysztof Parzyszek <kparzysz at quicinc.com> ---
The C4 instructions negate the result of the comparison (Pd = !cmp(...)).

The J4_cmpOP_C_jumpnv instructions do: if (R.new OP other-val) == C then jump
For example, J4_cmplt_f_jumpnv_nt will branch if (Ns8.new < Rt32) is false, or,
if (Rt32 > Ns8.new) is false, i.e. if !cmp.gt(Rt32, Ns8.new).

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