On 10/23/2014 07:05 PM, Richard Henderson wrote:
> On 10/21/2014 06:03 AM, Pavel Dovgalyuk wrote:
>> +dc->repz_opt = dc->jmp_opt
>> +/* Do not optimize repz jumps at all in icount mode,
>> because
>> + rep movsS instructions are execured with differe
On 10/21/2014 06:03 AM, Pavel Dovgalyuk wrote:
> +dc->repz_opt = dc->jmp_opt
> +/* Do not optimize repz jumps at all in icount mode,
> because
> + rep movsS instructions are execured with different
> paths
> + in repz_opt and !re
TCG generates optimized code for i386 repz instructions. It means that
when ecx becomes 0, execution of the string instruction breaks immediately
without an additional iteration for ecx==0 (which will only check ecx and
set the flags). Omitting this iteration leads to different
instructions countin
