gas 2.8.1 CPU32 bug (Was: as: unrecognized option `-c68020')
Mark Phillips
M.S.Phillips@nortel.co.uk
Wed Oct 22 10:35:00 GMT 1997
Are you sure your patch is completely correct?
My reading of the Motorola manuals is that, of the 020/030/040
addressing modes only (bd,An,Xn) and (bd,PC,Xn) are supported by the CPU32
and then only for word and long accesses. Your patch appears to allow all
the 020/030/040 modes and any width?!
I used a much more paranoid patch to solve the problem, I JUST allowing
the (bd,An,Xn) mode - the (bd,PC,Xn) mode was not causing me a problem.
Does anyone know what the offical patch is that made it into the beta
binutils?
Cheers
Mark
FYI - my patch:-
-------------------cut here-----------------
*** opcodes/m68k-opc.c.orig Tue May 20
10:33:18 1997
--- opcodes/m68k-opc.c Tue May 20 11:32:43 1997
***************
*** 1828,1835 ****
--- 1828,1837 ----
{"tstb", one(0045000), one(0177700), ";b", m68020up | mcf5200 },
{"tstb", one(0045000), one(0177700), "@b", m68000up },
{"tstw", one(0045100), one(0177700), "*w", m68020up | mcf5200 },
+ {"tstw", one(0045110), one(0177700), "As", cpu32 },
{"tstw", one(0045100), one(0177700), "@w", m68000up },
{"tstl", one(0045200), one(0177700), "*l", m68020up | mcf5200 },
+ {"tstl", one(0045210), one(0177700), "As", cpu32 },
{"tstl", one(0045200), one(0177700), "@l", m68000up },
{"unlk", one(0047130), one(0177770), "As", m68000up | mcf5200 },
-------------------cut here-----------------
Mark S. Phillips ESN 742 2461
msp@nortel.co.uk Tel. +44 1279 402461
On Wed, 22 Oct 1997, Robin Kirkham wrote:
>
> On Tue, 21 Oct 1997, Jim Wilson wrote:
> >
> > In article <199710220043.TAA19960.cygnus.crossgcc@eesn12.ews.uiuc.edu> you write:
> > >> _floatdixf
> > >> /tmp/cca12355.s: Assembler messages:
> > >> /tmp/cca12355.s:70: Error: operands mismatch -- statement `tstl a4'
> > ...
> > The GNU as bug is fixed in binutils 2.8.
> > ...
> > This gcc bug is fixed in both the EGCS gcc sources and gcc2 sources, so
> > the next release of either of them will not have this bug.
>
> There remains a gas 2.8.1 bug, however, which shows up with exactly the same
> symptoms when you configure EGCS to compile for the CPU32. This confused me
> for a while.
>
> The above-mentioned gas fix now only permits tst.[bwl] instructions with
> PCR, immediate and An addressing modes on 68020's and up, and Coldfires.
> However, the CPU32 can also execute these (and egcs will emit them).
>
> The following simple patch I believe corrects this situation: apply it in the
> binutils-2.8.1 directory.
>
> Robin Kirkham CSIRO Manufacturing Science and Technology
> Project Engineer Locked Bag 9, Preston 3072, Australia
> robin.kirkham@mlb.dmt.csiro.au Phone: +61 3 9662-7756 Fax: +61 3 9662-7851
>
>
> *** opcodes/m68k-opc.c Tue May 27 03:34:19 1997
> --- opcodes/m68k-opc.c Wed Oct 22 15:35:54 1997
> ***************
> *** 1825,1835 ****
>
> {"trapv", one(0047166), one(0177777), "", m68000up },
>
> ! {"tstb", one(0045000), one(0177700), ";b", m68020up | mcf5200 },
> {"tstb", one(0045000), one(0177700), "@b", m68000up },
> ! {"tstw", one(0045100), one(0177700), "*w", m68020up | mcf5200 },
> {"tstw", one(0045100), one(0177700), "@w", m68000up },
> ! {"tstl", one(0045200), one(0177700), "*l", m68020up | mcf5200 },
> {"tstl", one(0045200), one(0177700), "@l", m68000up },
>
> {"unlk", one(0047130), one(0177770), "As", m68000up | mcf5200 },
> --- 1825,1835 ----
>
> {"trapv", one(0047166), one(0177777), "", m68000up },
>
> ! {"tstb", one(0045000), one(0177700), ";b", m68020up|cpu32|mcf5200 },
> {"tstb", one(0045000), one(0177700), "@b", m68000up },
> ! {"tstw", one(0045100), one(0177700), "*w", m68020up|cpu32|mcf5200 },
> {"tstw", one(0045100), one(0177700), "@w", m68000up },
> ! {"tstl", one(0045200), one(0177700), "*l", m68020up|cpu32|mcf5200 },
> {"tstl", one(0045200), one(0177700), "@l", m68000up },
>
> {"unlk", one(0047130), one(0177770), "As", m68000up | mcf5200 },
>
More information about the crossgcc
mailing list