From mboxrd@z Thu Jan  1 00:00:00 1970
From: Jeffrey A Law <law@cygnus.com>
To: Jim Wilson <wilson@cygnus.com>
Cc: hjl@lucon.org (H.J. Lu), scox@cygnus.com, crux@pool.informatik.rwth-aachen.de, egcs@cygnus.com
Subject: Re: More fp bug in egcs 
Date: Tue, 05 May 1998 05:03:00 -0000
Message-id: <23110.894354239@hurl.cygnus.com>
References: <199805010234.TAA02560@ada.cygnus.com.cygnus.com>
X-SW-Source: 1998-05/msg00123.html

  In message <199805010234.TAA02560@ada.cygnus.com.cygnus.com>you write:
  > I believe this is another bug in the same i386 code as my last patch.
  > 
  > The problem is that the only FP->DImode converstion instruction pops the
  > FP stack.  Normally we have both popping and non-popping versions of
  > instructions.  The x86 code handles this by aborting if we need to emit
  > the non-existent non-popping instruction.  However, this can't work all
  > of the time, because it assumes the optimizer always generates optimal
  > code.  That isn't safe.  And it is obviously not safe if we are compiling
  > without optimization.
  > 
  > In order to fix this, we need to emulate the missing instruction if gcc
  > needs to emit it.  The following patch does this.   If there is a better wa
  > y
  > to do this, then let me know.
  > 
  > Thu Apr 30 19:28:16 1998  Jim Wilson  <wilson@cygnus.com>
  > 
  > 	* i386.c (output_fix_trunc): Add code to emulate non-popping DImode
  > 	case.
I went ahead and checked this into the release branch and the mainline
sources.
jeff