[Libre-soc-bugs] [Bug 1068] add instructions from ls012 not currently implemented in binutils

[bugzilla-daemon at libre-soc.org]

https://bugs.libre-soc.org/show_bug.cgi?id=1068

--- Comment #9 from Luke Kenneth Casson Leighton <lkcl at lkcl.net> ---
(In reply to Dmitry Selyutin from comment #7)
> fptstp(s),   TBD,   high,  10, yes, EXT0xx, no, sv/fclass, 1R1w, SFFS, TODO
> fmvtg(s),    ls006, high, 10, yes, EXT0xx, no, sv/int_fp_mv, 1R1W1w, SFFS,
> TODO
> fmvfg(s),    ls006, high, 10, yes, EXT0xx, no, sv/int_fp_mv, 1R1W1w, SFFS,
> TODO
> fcvtfg(s),   ls006, high, 10, yes, EXT0xx, no, sv/int_fp_mv, 1R1W1w, SFFS,
> TODO
> fcvttg(s),   ls006, high, 9,  yes, EXT0xx, no, sv/int_fp_mv, 1R1W1w, SFFS,
> TODO
> 
> These don't appear to be present in openpower-isa repos. Are they some kind
> of aliases?

no, rats. ok leave them off for now - jacob needs to implement them
in ISACaller. let me track down an appropriate bugreport/budget for that

> ffadd(s),    TBD,   med,  10, yes, EXT2xx, no, isa/svfparith, 2R1W1w, opt,
> TODO
> ffsub(s),    TBD,   med,  10, yes, EXT2xx, no, isa/svfparith, 2R1W1w, opt,
> TODO
> ffmul(s),    TBD,   med,  10, yes, EXT2xx, no, isa/svfparith, 2R1W1w, opt,
> TODO
> ffdiv(s),    TBD,   med,  10, yes, EXT2xx, no, isa/svfparith, 2R1W1w, opt,
> TODO
> fdmadd(s),   TBD,   med,  5,  yes, EXT2xx, no, isa/svfparith, 3R2W1w, opt,
> TODO
> ffmadd(s),   TBD,   med,  5,  yes, EXT2xx, no, isa/svfparith, 3R2W1w, opt,
> TODO
> ffmsub(s),   TBD,   med,  5,  yes, EXT2xx, no, isa/svfparith, 3R2W1w, opt,
> TODO
> ffnmadd(s),  TBD,   med,  5,  yes, EXT2xx, no, isa/svfparith, 3R2W1w, opt,
> TODO
> ffnmsub(s),  TBD,   med,  5,  yes, EXT2xx, no, isa/svfparith, 3R2W1w, opt,
> TODO

these are not transcendentals, they are DCT and FFT butterfly instructions.

> Shouldn't these (and also listed above) be present amongst FPTRANS_INSNS?

no, they're "move and/or convert" instructions intended to be mandatory
additions to SFFS.

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