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Date: Fri, 15 Dec 2000 17:37:47 +0100
From: Martijn <jkf AT penguinpowered DOT com>
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To: pgcc AT delorie DOT com
Subject: Re: pgcc generates invalid asm code
References: <Pine DOT SGI DOT 4 DOT 21 DOT 0012151328430 DOT 8219194-100000 AT paju DOT oulu DOT fi>
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Tuukka Toivonen wrote:

> Problem: Pentium GCC generates assembly like the following:
>
> .L868:
>         movl 120(%esp),%eax
>         addl %edx,%eax
>         movd %eax,%mm0
>         pslld $4,%mm0
>         <84>,<AD><FB>
>         movd %eax,%mm1
>         psubd %mm1,%mm0
>         movd %mm0,%edx
>         sall $3,%edx
>         testl %ebp,%ebp
>         je .L938
>
> and as you can see there are invalid characters there. And the assembler
> complains, of course (ie. there are ASCII characters #84, #AD and #FB).
>
> Most files in the program were compiled successfully, but this file
> produced the above string <84>,<AD><FB> twice in the 7000 line asm file.
>
> It happened only when I tried using the -mmx switch.
>
> Programs I'm using:
>
> GNU assembler 2.9.5
>  774574 Nov 17 14:20 gcc-2.95.2-pgcc-2.95.3.diff
>  12885815 Dec  7 14:22 gcc-2.95.2.tar.gz
>
> Command line:
>
> -s -O3 -fomit-frame-pointer -Wall -mpentiumpro -march=pentiumpro
> -malign-functions=4 -funroll-loops  -fexpensive-optimizations
> -malign-double -fschedule-insns2 -mwide-multiply -mmx
>
> Red Hat 6.2 equivalent system.
>
> By the way, the same happens also with Athlon GCC (which is patch against
> the pgcc).

I had the same problem when using -mmx, not using -mmx "solved" the problem