Re: [Nasm-devel] [PATCH 00/11] new MPX, SHA instructions

[H. P. A. <hp...@zy...>]

On 10/16/2013 12:36 AM, anonymous coward wrote:
>> BND prefix support is also added. I did not know of a case using bnd and jcc8
>> at the same time. So I left that unresolved. Please let me know if this should
>> be resolved.
> 
> BND works for these:
> 
>   Jcc Jb/Jz, CALL/JMP Jz/Ev, RET(N), RET(N) Iw
> 
> BND should warn for anything else, including JMP Jb.
> 

BND JMP is actually a bit of a headache.  JMP Jb doesn't require BND
because JMP Jb is used for intramodule jumps, so arguably:

	BND JMP foo

... should drop the BND prefix if the JMP is relaxed to the Jb form, as
the programmer doesn't know a priori if the Jb or Jz form will be generated.

	BND JMP short foo

... should be a warning, though.

	-hpa