From mboxrd@z Thu Jan  1 00:00:00 1970
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Date: Wed, 16 Nov 2011 14:35:49 -0800
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From: Charles Forsyth <charles.forsyth@gmail.com>
To: Fans of the OS Plan 9 from Bell Labs <9fans@9fans.net>
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Subject: Re: [9fans] 6a bug
Topicbox-Message-UUID: 40f34092-ead7-11e9-9d60-3106f5b1d025

AX is the wrong register. REGARG is BP. actually, it's "RARG" in 6a, in cas=
e it
changes, although that seems less likely now.

On 16 November 2011 14:25, erik quanstrom <quanstro@labs.coraid.com> wrote:
> i plan to look at this when i get home, but it appears that 6a
> doesn't like big numbers. =C2=A0demo script follows
>
> - erik
> -------
> ; cat >a.s <<'EOF'
> #define KZERO =C2=A0 (0xffffff0000000000ull)
>
> TEXT bignumber(SB), 1, $0
> =C2=A0 =C2=A0 =C2=A0 =C2=A0ADDQ =C2=A0 =C2=A0$KZERO, AX
> =C2=A0 =C2=A0 =C2=A0 =C2=A0RET
> EOF
> ; cat >ac.c<<EOF
> #include <u.h>
> #include <libc.h>
>
> extern uvlong bignumber(uvlong);
>
> void
> main(void)
> {
> =C2=A0 =C2=A0 =C2=A0 =C2=A0print("%llux\n", bignumber(0));
> =C2=A0 =C2=A0 =C2=A0 =C2=A0exits("");
> }
> EOF
> ; 6a a.s; 6c ac.c; 6l a.6 ac.6
>
>