powerpc-eabi assembler problems
Tue Dec 14 21:19:00 GMT 1999
Ian Lance Taylor wrote:
> Date: Tue, 14 Dec 1999 20:58:16 -0800
> From: Peter Popov <email@example.com>
> I'm using a powerpc-eabi compiler which I built from
> gcc-2.92.2 and binutils-2.9.1. The assembler chokes on
> instructions like this one:
> li r5, 0xfffe
> initads.s:194: Error: operand out of range (65534 not between -32768 and 32767)
> It complains that the operand is out of range, when in fact,
> if should just translate the 0xfffe t0 -2. Does anyone know if
> this is an assembler bug, or is it a feature?
> It's a feature. You're asking the assembler to load 0xfffe into r5.
> That can't be done in one li instruction. You can load 0xfffffffe,
> but you can't load 0x0000fffe.
> Did gcc generate that instruction?
No, it's in an assembly file I got from Motorola's web site.
The file was assembled with the Diab Data assembler; I tried that
and it worked (the Diab Data assembler generates : "li r5,-2"
from the "li r5, 0xfffe"), which is why I thought it was a bug.
Thank you for the feedback.
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