Re: [PATCH] x86/math-emu: Add support for FCMOVcc and F[U]COMI[P] insns

From: Ingo Molnar
Date: Mon Aug 24 2015 - 02:50:21 EST

* Ingo Molnar <mingo@xxxxxxxxxx> wrote:

> * Denys Vlasenko <dvlasenk@xxxxxxxxxx> wrote:
> > I propose the table to be commented like shown below:
> >
> > /*Opcode: d8 d9 da db dc dd de df */
> > /*c0..f*/ fadd__, fld_i_, fcmovb, fcmovnb, fadd_i, ffree_, faddp_, _df_c0_,
> > /*c8..f*/ fmul__, fxch_i, fcmove, fcmovne, fmul_i, _dd_c8_,fmulp_, _df_c8_,
> > /*d0..7*/ fcom_st,fp_nop, fcmovbe,fcmovnbe,_dc_d0_,fst_i_, _de_d0_,_df_d0_,
> > /*d8..f*/ fcompst,_d9_d8_, fcmovu, fcmovnu, _dc_d8_,fstp_i, fcompp, _df_d8_,
> > /*e0..7*/ fsub__, FPU_etc, __BAD__,finit_, fsubri, fucom_, fsubrp, fstsw_,
> > /*e8..f*/ fsubr_, fconst, fucompp,fucomi_, fsub_i, fucomp, fsubp_, fucomip,
> > /*f0..7*/ fdiv__, FPU_triga,__BAD__,fcomi_, fdivri, __BAD__,fdivrp, fcomip,
> > /*f8..f*/ fdivr_, FPU_trigb,__BAD__,__BAD__, fdiv_i, __BAD__,fdivp_, __BAD__,
> I agree with that, but please fix the vertical alignment (like my patch did), as
> the table is pretty hard to navigate in this form.

and by that I mean to split each line into two, to have groups of 4 instructions
and enough tabs between them.

> Also, the first patch in the series should remove the 'undocumented' #ifdef.
> That define was fully justified ~20 years ago but let's not complicate new code
> with it.

The formerly undocumented opcodes could also grow real names.

All in nicely separate patches.


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