Xref: news2.mv.net comp.os.msdos.djgpp:3491
From: terra AT diku DOT dk (Morten Welinder)
Newsgroups: comp.os.msdos.djgpp
Subject: Re: Bug in AS?
Date: 4 May 1996 12:47:32 GMT
Organization: Department of Computer Science, U of Copenhagen
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To: djgpp AT delorie DOT com
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I haven't verified this particular example but in general
gas is buggy on two accounts:

1. Prefixes.  Use separate instructions like "fs".
2. Guessing operand sizes.  Always specify suffixes yourself.

It's in the FAQ, I believe.  I has been reported to the right
places, but if anyone feels like repeating that maybe it would
help.

Morten




fmarcos AT jet DOT es (Fernando Marcos) writes:

>I have found something "curious" in as. For example, assembling:

>	movw $1234,%fs:wops
>or
>	incl %fs:wops

>goes ok, but replacing the constant with a register:
>	movw %ax,%fs:wops

>just generates 
>	movw %ax,wops

>which is not, preciselly, what we wanted, as it drops the segment
>prefix.

>Writing
>	fs
>	movw %ax,wops

>generates the correct code.

>Can someone else test it and tell me something?  My as is dated Feb 02
>1996, 2:08a.

>Fernando Marcos


improvement.  Otherwise, use the appropriately sized integer (short,
long, or long long) explicitly.

   (I had a program that stored 2097152 integers in an array. I used "int". I
   expected this to be four megabytes... what to my wondering eyes should
   appear but

   LSCAPE      DAT   8388608  11.07.95    9:50 LSCAPE.DAT
   )

-- 
Art S. Kagel, kagel AT quasar DOT bloomberg DOT com

A proverb is no proverb to you 'till life has illustrated it.  -- John Keats