Re: push and pop of FPU stack ; record st registers

[Hui Zhu <teawater at gmail dot com>]

I think make the function can run is the first job,

Hui

On Sat, May 23, 2009 at 14:17, paawan oza <paawan1982@yahoo.com> wrote:
>
> yes. I can record all st0 to st7 registers. that is not a problem.
> but, at every insn which push/pop FPU stack, if we record all st0 to st7, we will be occupying too much of record memory.
> (memory usage will be more for our records)
>
> I was just thinking of optimizing it with some cache.
> but at the moment I think I can go ahead with plain implementation of recording st0 to st7.
>
> Regards,
> Oza.
>
>
>
> --- On Sat, 5/23/09, Hui Zhu <teawater@gmail.com> wrote:
>
>> From: Hui Zhu <teawater@gmail.com>
>> Subject: Re: push and pop of FPU stack ; record st registers
>> To: "paawan oza" <paawan1982@yahoo.com>
>> Cc: "gdb ml" <gdb@sourceware.org>
>> Date: Saturday, May 23, 2009, 9:34 AM
>> 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.
>> >
>> >
>> >
>> >
>>
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