Re: CVS commit: src/sys/arch/x86/include

[SAITOH Masanobu <msaitoh%execsw.org@localhost>]

(2013/11/21 15:02), matthew green wrote:
>> Module Name: src
>> Committed By:        msaitoh
>> Date:                Wed Nov 20 17:50:39 UTC 2013
>>
>> Modified Files:
>>      src/sys/arch/x86/include: specialreg.h
>>
>> Log Message:
>> -  Add some AMD Fn80000001 extended features %ecx bits definitions from
>>   the document (AMD64 Architecture Programmer's Manual Volume 3: 
>> General-Purpose and
>>   System Instructions. Document revision 3.20)
>>
>> -  "s/MXX/MMXX/" because this bit is "MMX eXtention".
> 
> i thought it was Multi Media eXtension.

 MMX:
        Fn00000001 %edx bit 23 (Intel and AMD)
        Fn80000001 %edx bit 23 (Same as Fn00000001 %edx, AMD only)

 AMD MMX Extension:
        Fn80000001 %edx bit 22 (AMD extensions to MMX instruction, AMD Only)

See Pase 580 in AMD64 Architecture Programmer's manual Volume 3 revision 3.20 :)

-- 
-----------------------------------------------
                SAITOH Masanobu (msaitoh%execsw.org@localhost
                                 msaitoh%netbsd.org@localhost)