[Llvm-bgq-discuss] Interpreting CLANG assembly

[Thomas Gooding]

Hal Finkel <hfinkel at anl.gov> wrote on 04/18/2013 03:45:45 PM:
> > After increasing the verbosity (bgclang -v), the assembler call looks
> > incorrect:
> > "/bgsys/drivers/ppcfloor/gnu-linux/lib/gcc/powerpc64-bgq-linux/4.
> 4.6/../../../../powerpc64-bgq-linux/bin/as"
> > -a64 -mppc64 -many -o start.o /tmp/start-9mU46t.s
> >
> > Whereas I think it should be:
> > "/bgsys/drivers/ppcfloor/gnu-linux/lib/gcc/powerpc64-bgq-linux/4.
> 4.6/../../../../powerpc64-bgq-linux/bin/as"
> > -a64 -ma2q -many -o start.o /tmp/start-9mU46t.s
> >
> > Maybe there's a way to configure this somewhere?
>
> I'll need to update it in the driver; thanks for investigating this!
> The problem is that Clang tries to cheat, in a sense, and instead of
> trying to figure out exactly which architecture to use for different
> ppc64 cores, it just passes -many (which should enable all
> extensions). However, this may fall down where embedded extensions
> are involved. If you take the assembly file and compile it with the
> default as command line, but add -mbooke, does that make it work?
>
>  -Hal

Unfortunately, adding -mbooke does not help.  I get same error messages:

/bgsys/drivers/ppcfloor/gnu-linux/lib/gcc/powerpc64-bgq-linux/4.4.6/../../../../powerpc64-bgq-linux/bin/as
 -a64 -mppc64 -many -o start.o a.s -mbooke
start.S: Assembler messages:
start.S:278: Error: junk at end of line: `1,0'
start.S:938: Error: junk at end of line: `1,0'
start.S:1189: Error: junk at end of line: `1,0'
start.S:1428: Error: junk at end of line: `1,0'
start.S:1630: Error: junk at end of line: `1,0'

Tom Gooding
Senior Engineer / Blue Gene Kernels
507-253-0747  (internal:  553-0747)
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