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From: Michael S <already5chosen@yahoo.com>
Newsgroups: comp.arch
Subject: Re: Calling conventions (particularly 32-bit ARM)
Date: Tue, 14 Jan 2025 23:48:19 +0200
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On Tue, 14 Jan 2025 19:18:27 +0100
Terje Mathisen <terje.mathisen@tmsw.no> wrote:

> Stephen Fuld wrote:
> > On 1/12/2025 5:20 PM, Waldek Hebisch wrote: =20
> >> You are implicitely assuming that passing large number of
> >> arguments is expensive.  =20
> >=20
> > I guess.=A0 I am actually assuming that passing arguments in memory
> > is more expensive than passing them in registers.=A0 I don't think
> > that is controversial. =20
>=20
> Usually true, except for recursive functions where you have to store=20
> most stuff on the stack anyway, so going directly there can sometimes=20
> generate more compact code.
>=20
> Terje
>=20

I would think that for Fortran (=3D=3Deverything passed by reference)
memory would beat registers most of the time. May be, except for
functions with 0-4 parameters.
Do common Fortarn compilers even bother with passing in register?
It would require replacement of natural by-reference "pointer in
register points to value in memory" calling sequence to something like
copy-in/copy-out, right?