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Re: [Qemu-devel] Add CMP2 instruction
From: |
Laurent Vivier |
Subject: |
Re: [Qemu-devel] Add CMP2 instruction |
Date: |
Fri, 7 Nov 2014 14:44:12 +0100 (CET) |
> Le 7 novembre 2014 à 11:14, "Guo, Lei" <address@hidden> a écrit :
>
>
> This patch aims to add CMP2 instruction for m68k family.
>
>
>
> Description: Compares the value in Rn to each bound. The effective address
> contains the
>
> bounds pair: upper bound following the lower bound. For signed comparisons,
> the
>
> arithmetically smaller value should be used as the lower bound. For unsigned
>
> comparisons, the logically smaller value should be the lower bound.
>
> The size of the data and the bounds can be specified as byte, word, or long.
> If Rn is a
>
> data register and the operation size is byte or word, only the appropriate
> low-order part
>
> of Rn is checked. If Rn is an address register and the operation size is byte
> or word,
>
> the bounds operands are sign-extended to 32 bits, and the resultant operands
> are
>
> compared to the full 32 bits of An.
>
> If the upper bound equals the lower bound, the valid range is a single value.
>
Moreover, this seems a cut&paste of the Motorola "Programmer's reference
manual".
It should be copyrighted : have we the right to copy this part in a commit
message ?
Regards,
Laurent
- [Qemu-devel] Add CMP2 instruction, Guo, Lei, 2014/11/07
- Re: [Qemu-devel] Add CMP2 instruction, Alex Bennée, 2014/11/07
- Re: [Qemu-devel] Add CMP2 instruction, Andreas Färber, 2014/11/07
- Re: [Qemu-devel] Add CMP2 instruction, Richard Henderson, 2014/11/07
- Re: [Qemu-devel] Add CMP2 instruction, Laurent Vivier, 2014/11/07
- Re: [Qemu-devel] Add CMP2 instruction,
Laurent Vivier <=
- Re: [Qemu-devel] Add CMP2 instruction, Andreas Schwab, 2014/11/07