From mboxrd@z Thu Jan  1 00:00:00 1970
From: Ian Lance Taylor <ian@cygnus.com>
To: hjl@lucon.org
Cc: schmid@ltoi.iap.physik.tu-darmstadt.de, egcs@cygnus.com, gas2@cygnus.com
Subject: Re: binutils 2.9 is broken on x86
Date: Wed, 08 Apr 1998 11:05:00 -0000
Message-id: <199804081805.OAA24674@subrogation.cygnus.com>
References: <m0yMz9o-00058tC@ocean.lucon.org>
X-SW-Source: 1998/msg00097.html

   From: hjl@lucon.org (H.J. Lu)
   Date: Wed, 8 Apr 1998 11:01:08 -0700 (PDT)

   > These are the testsuite results for egcs-2.91.22 on the
   > i386-pc-linux-gnulibc1 system. I had to add --disable-nls to configure
   > to compile egcs. What about making --disable-nls a default option for
   > the texinfo configure?
   > 
   > Peter Schmid
   > 
   > gcc:
   > gcc.sum:FAIL: gcc.c-torture/compile/980329-1.c,  -O2 
   > /tmp/cca17739.s: Assembler messages:
   > /tmp/cca17739.s:75: Error: register does not match opcode suffix

This is an error which H.J. added to his version of the binutils.  It
is not yet in the GNU binutils.

   binutils 2.9 is broken on x86. It silently turns

   incb %di

   into

   incl   %edi

   Although my binutils chokes on it, however it didn't generate
   bogus opcode. I will make binutils 2.8.1.0.30 to fix it. In
   the meantime, please don't go back to old binutils.

   Ian, please don't make 2.9 as is. It turns out my worry comes
   true. My x86 patch seems quite useful.

Although H.J. doesn't mention it, gas has behaved this way for many
years.

I do not plan to delay the 2.9 release to change this behaviour.  The
potential bad consequences of adding errors, and thus failing to
assemble existing code, are serious.  Turning `incb %di' into `incl
%edi' will almost always be harmless.

Ian