From mboxrd@z Thu Jan  1 00:00:00 1970
From: John Carr <jfc@mit.edu>
To: Jim Wilson <wilson@cygnus.com>
Cc: egcs@cygnus.com
Subject: Re: HOST_WIDE_INT = long long patches 
Date: Wed, 22 Apr 1998 04:19:00 -0000
Message-id: <199804221119.HAA17199@contents-vnder-pressvre.MIT.EDU>
References: <199804220053.RAA21350@rtl.cygnus.com>
X-SW-Source: 1998-04/msg00900.html

> This change in final.c (split_double) doesn't look like it will work.
> 
> ! 	  high = GEN_INT (INTVAL (value) << (HOST_BITS_PER_WIDE_INT - 2 * BITS_PER_WORD) >> (HOST_BITS_PER_WIDE_INT - BITS_PER_WORD));
> 
> If HOST_BITS_PER_WIDE_INT and BITS_PER_WORD are the same, then you end up with
> a negative shift count for the first shift, which is undefined.

The shift count is nonnegative because the code is inside a test:

      if (HOST_BITS_PER_WIDE_INT >= (2 * BITS_PER_WORD))