Re: [Nasm-devel] [PATCH 08/11] MPX: Add test cases for MPX

[anonymous c. <nas...@us...>]

> +	bndstx [rax+0x3,rbx], bnd0	; NASM - split EA
> +	bndstx [rax+rbx*1+0x3], bnd0	; GAS
> +	bndstx [rax+rbx+3], bnd0	; GAS
> +	bndstx [rax+0x3], bnd0, rbx	; ICC-1
> +	bndstx [rax+0x3], rbx, bnd0	; ICC-2

The GAS one is the only one that follows traditional NASM
syntax. I see zero reason to clutter NASM with the 3-op or
the comma syntax -- both of them can be implemented via
fairly trivial macros, if a user really wants to code that way.

As a result, you will end up with much less intrusive NASM
changes for MPX support. All you really need is (a) warn for
16-bit address size for MPX memory instructions, (b) warn
for EIP/RIP-relative address size for BND{LDX,STX,MK}, as
well as (c) don't permit the EAF_TIMESTWO optimizations.