Re: Any more graceful way to saturate adds?

Terje Mathisen wrote:

> you can instead write:
> 
>   mov al,0AAh
> org $-1        ; Back up one byte into the immediate constant above
> next:
>   stosb
> 
> I.e. on the first iteration we do a dummy two-byte instruction with a 
> one-byte immediate, which we then make sure contains the STOSB opcode
byte.
> 
> The gain is that we save one opcode byte (MOV instead of JMP SHORT) and 
> a taken branch, so the actual cost of rotating the loop like this is 8 
> cycles on the first iteration, instead of 17, and each iteration saves 
> two opcode bytes or 8 cycles.
> 
Neat.