[parisc-linux] PIC assembly

[John David Anglin]

> I'ved filed a possible patch for this in the bug report, but I'm not
> 100% convinced I understand this correctly. Can someone please take a
> look and let me know? 

The patch needs to be revised.  You can't use r19 as a scratch register
in PIC mode.  There are several places where it is used in the routine.
Maybe you use can use r1 in its place.

> --- udiv-qrnnd.S.orig	Thu May 31 03:14:12 2001
> +++ udiv-qrnnd.S	Sat Jan  5 23:27:02 2002
> @@ -51,8 +51,11 @@
>  
>  	stws		%r25,-16(0,%r30)	; n_hi
>  	stws		%r24,-12(0,%r30)	; n_lo
> -	ldil		L'L$0000,%r19           ; '
> -	ldo		R'L$0000(%r19),%r19     ; '
> +
> +	stw             %r19,-32(%r30)
> +	addil		LT%L$0000,%r19
> +	ldw		RT%L$0000(%r1),%r1

Change following fldds insn to use r1, or change destination register in
the above to some other caller saved register and the fldds insn to match.

> +	ldw		0(%r1), %r19

Wrong.  This would load 0x43f00000 into r19.

Finally, you should put the data in the data section.  There might be a
problem accessing data in the code section with LT% (RT%) because LT%
is "LR% value offset of data linkage slots from linkage table pointer (r19)".

Dave
-- 
J. David Anglin                                  dave.anglin@nrc.ca
National Research Council of Canada              (613) 990-0752 (FAX: 952-6605)