[Info-vax] A portable VMS, was: Re: OS Ancestry

[Arne Vajhøj]

On 5/18/2021 3:03 PM, Simon Clubley wrote:
> On 2021-05-18, Arne Vajhøj <arne at vajhoej.dk> wrote:
>> Another problem with going only 64 bit pointers in Alpha
>> would have been VEST. When the tool saw a MOVL should it guess
>> on whether it was moving data or moving an address?
> 
> In a portable VMS, that problem probably would not exist

It would.

char *p1, *p2;
p2 = p1;

may be portable but in the binary it would either move 4 bytes
or 8 bytes.

>                                                          and if
> it was required for some reason, it would be handled in the same
> way as however the Macro-32 compiler works in that case on Alpha.

The Macro-32 compiler uses 32 bit pointers on 64 bit VMS.

Arne