From jmc.bruck at orange.fr  Fri Jul 17 09:41:31 2026
From: jmc.bruck at orange.fr (Jean-Michel)
Date: Fri, 17 Jul 2026 10:41:31 +0200
Subject: OSLib Hdr macros
Message-ID: <1e1bb9f95c.jmb@jmc.bruck.orange.fr>

Hi

I just noticed that the oslib.Hdr.macros was not up to date: there are 26b 
instructions!

eg.
        MACRO
$label  SetN
        ;C=0 V=0 Z=0 N=1
$label  CMN     PC, #&80000000
        MEND

idem for SetV; SetZ, SetC

I hope the version below is correct:?
; 32 bit PSR:
;  N|Z|C|V
        MACRO
$label  SetN
        ;C=0 V=0 Z=0 N=1
        MSR  CPSR_flg,#0x80000000    ; Set all the flags regardless
                                     ; of their previous state
                                     ; (does not affect any control bits)

Thanks,
-- 
Jean-Michel


From ccawley2011 at gmail.com  Fri Jul 17 21:14:22 2026
From: ccawley2011 at gmail.com (Cameron Cawley)
Date: Fri, 17 Jul 2026 21:14:22 +0100
Subject: OSLib Hdr macros
In-Reply-To: <1e1bb9f95c.jmb@jmc.bruck.orange.fr>
References: <1e1bb9f95c.jmb@jmc.bruck.orange.fr>
Message-ID: <CAN-tyhS7XJDsa5wYCKseVVBS1UUBAqH84Ng1CDq=nDQQ_pJ03w@mail.gmail.com>

Hi

I haven't checked the correctness of the new code, but I should mention
that MSR is a no-op on ARM3 and earlier, so it would be good for the macro
to be fully 26/32-bit neutral instead of just one or the other.

Are these used anywhere that could be used to verify the correctness in
practice?

Regards
Cameron


On Fri, 17 Jul 2026 at 09:41, Jean-Michel via oslib-user <
oslib-user at lists.compton.nu> wrote:

> Hi
>
> I just noticed that the oslib.Hdr.macros was not up to date: there are 26b
> instructions!
>
> eg.
>         MACRO
> $label  SetN
>         ;C=0 V=0 Z=0 N=1
> $label  CMN     PC, #&80000000
>         MEND
>
> idem for SetV; SetZ, SetC
>
> I hope the version below is correct:?
> ; 32 bit PSR:
> ;  N|Z|C|V
>         MACRO
> $label  SetN
>         ;C=0 V=0 Z=0 N=1
>         MSR  CPSR_flg,#0x80000000    ; Set all the flags regardless
>                                      ; of their previous state
>                                      ; (does not affect any control bits)
>
> Thanks,
> --
> Jean-Michel
>
> _______________________________________________
> oslib-user mailing list
> oslib-user at lists.compton.nu
> https://lists.compton.nu/mailman/listinfo/oslib-user
>
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