push and pop of FPU stack ; record st registers

[Hui Zhu]

You cannot record st0 to st7?

Hui

On Fri, May 22, 2009 at 23:43, paawan oza <paawan1982@yahoo.com> wrote:
>
> Hi,
>
> the instructions such as;
> fld1, which pushes fpu stack and insn faddp pops registers stack,
> we need to record all st0 to st7 registers. because all will be changed on push/pop.
> as pushing/popping changes all the registers, at such insns (which does push/pop) we record all st0 to st7 registers that may affect the performance.
>
> currently I can not think of any alternative
> (may be we cache registers all the time and we record only those which may change) but by doing that we only save memory. performance is still question :(
>
> Does anybody have any other suggestion ?
>
> Regards,
> Oza.
>
>
>
>