Re: [Qemu-devel] [RISU RFC PATCH v2 06/14] x86.risu: add MMX instructions

[Jan Bobek]

On 7/3/19 5:49 PM, Richard Henderson wrote:
> On 7/1/19 6:35 AM, Jan Bobek wrote:
>> +MOVQ            MMX     00001111 011 d 1110 !emit { rex(w => 1); modrm(mod 
>> => MOD_DIRECT, rm => ~REG_ESP); }
>> +MOVQ_mem        MMX     00001111 011 d 1110 !emit { rex(w => 1); modrm(mod 
>> => ~MOD_DIRECT); mem(size => 8); }
> 
> Oh, note that there are only 8 mmx registers, so the respective rex.{r,b} bit
> can't be set.

Actually, my CPU chewed it without choking even when the bits were
set, but it will taken care of in v3.

-Jan