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From: "Louis Santillan (lpsantil AT gmail DOT com) [via djgpp AT delorie DOT com]" <djgpp AT delorie DOT com>
Date: Thu, 9 Mar 2017 15:13:11 -0800
Message-ID: <CAB9Rao8M=6bk+2BJGsCCQVs0q_aUHwf3+6zP+aG+k4oywE3LOQ@mail.gmail.com>
Subject: Re: BUG: djgpp should allow 16-byte alignment
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Are you unable to use `--mstackrealign`, `-mpreferred-stack-boundary=num`,
`-mincoming-stack-boundary=num` [0]?  Looks like you'll also need to force
those options if you compile with `-Os` as well.


[0]
https://gcc.gnu.org/onlinedocs/gcc-4.8.5/gcc/i386-and-x86-64-Options.html#i386-and-x86-64-Options


On Thu, Mar 9, 2017 at 8:14 AM, jwjagersma AT gmail DOT com [via djgpp AT delorie DOT com]
<djgpp AT delorie DOT com> wrote:

> Currently it seems that djgpp does not support 16-byte alignment. Since
> djgpp-compiled programs can potentially use SSE instructions (either
> explicitly or implicitly, when compiled with -march=pentium3), I do think
> this should be supported.
>
> previous discussion:
> > https://gcc.gnu.org/bugzilla/show_bug.cgi?id=79935
>

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<div dir=3D"ltr">Are you unable to use `--mstackrealign`, `-mpreferred-stac=
k-boundary=3Dnum`, `-mincoming-stack-boundary=3Dnum` [0]?=C2=A0 Looks like =
you&#39;ll also need to force those options if you compile with `-Os` as we=
ll.<div><br></div><div><br></div><div>[0] <a href=3D"https://gcc.gnu.org/on=
linedocs/gcc-4.8.5/gcc/i386-and-x86-64-Options.html#i386-and-x86-64-Options=
">https://gcc.gnu.org/onlinedocs/gcc-4.8.5/gcc/i386-and-x86-64-Options.html=
#i386-and-x86-64-Options</a>=C2=A0=C2=A0</div></div><div class=3D"gmail_ext=
ra"><br><div class=3D"gmail_quote">On Thu, Mar 9, 2017 at 8:14 AM, <a href=
=3D"mailto:jwjagersma AT gmail DOT com">jwjagersma AT gmail DOT com</a> [via <a href=3D"m=
ailto:djgpp AT delorie DOT com">djgpp AT delorie DOT com</a>] <span dir=3D"ltr">&lt;<a hr=
ef=3D"mailto:djgpp AT delorie DOT com" target=3D"_blank">djgpp AT delorie DOT com</a>&gt;=
</span> wrote:<br><blockquote class=3D"gmail_quote" style=3D"margin:0 0 0 .=
8ex;border-left:1px #ccc solid;padding-left:1ex">Currently it seems that dj=
gpp does not support 16-byte alignment. Since djgpp-compiled programs can p=
otentially use SSE instructions (either explicitly or implicitly, when comp=
iled with -march=3Dpentium3), I do think this should be supported.<br>
<br>
previous discussion:<br>
&gt; <a href=3D"https://gcc.gnu.org/bugzilla/show_bug.cgi?id=3D79935" rel=
=3D"noreferrer" target=3D"_blank">https://gcc.gnu.org/bugzilla/<wbr>show_bu=
g.cgi?id=3D79935</a><br>
</blockquote></div><br></div>

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