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Re: [Qemu-devel] [PATCH v6 2/7] target/mips: Support R5900 specific thre


From: Philippe Mathieu-Daudé
Subject: Re: [Qemu-devel] [PATCH v6 2/7] target/mips: Support R5900 specific three-operand MULT and MULTU
Date: Mon, 1 Oct 2018 01:21:02 +0200
User-agent: Mozilla/5.0 (X11; Linux x86_64; rv:60.0) Gecko/20100101 Thunderbird/60.0

On 10/1/18 12:20 AM, Maciej W. Rozycki wrote:
> On Sun, 30 Sep 2018, Philippe Mathieu-Daudé wrote:
> 
>>> TX79 do not implement DMULT or DMULTU, the Tx49 does and they do support 
>>> the extra `rd' operand there[1].  Still no DMADD or DMADDU though.
>>
>> As does the TX39.
> 
>  Umm, the TX39 is 32-bit and does not have 64-bit instructions, so it 
> can't have DMULT or DMULTU.

I meant "As does the TX39 [with the MULT and MULTU:] support the extra
`rd' operand".

>> There is also the TX99 series (based on 25Kf):
>> https://www.toshiba.co.jp/about/press/2002_02/pr1901.htm
> 
>  Hmm, did the TX99 actually tape out?  I thought the 25Kf was withdrawn 
> and never made it to market.  I only saw a couple of 25Kf LVs on Malta CPU 
> daughtercards back in my MIPS UK days in mid 2000s.

Lucky you :)

I never fished any TX99 binary.



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