While on this can anyone see why the following:

5:	movd	0x01010101,r3		/* Magic number to use */
	movd	0x80808080,r4		/* Another magic number. */
	
	movd	0(r1),r5		/* Get 1st double word. */
	movd	r5,r0			/* Save for storage later. */
	subd	r3,r0			/* Gets borrow if byte = 0. */
	bicd	r5,r0			/* Clear original bits. */
	andd	r4,r0			/* See if borrow occurred. */
	cmpqd	0,r0
	bne	1f			/* See if this DWORD contained a 0. */

	.align	2,0xa2
0:	movd	4(r1),r0		/* Get next 4 bytes to process */
	movd	r5,0(r2)		/* Save away prev four bytes. */
	addd	4,r1			/* addd is faster then addqd here */
	addd	4,r2
	movd	r0,r5			/* Save for storage if no zeros. */
	subd	r3,r0
	bicd	r5,r0
	andd	r4,r0
	cmpqd	0,r0
	beq	0b


can not be re-written as:

5:	movd	0x01010101,r3		/* Magic number to use */
	movd	0x80808080,r4		/* Another magic number. */
	
0:	movd	0(r1),r5		/* Get 1st double word. */
	movd	r5,r0			/* Save for storage later. */
	subd	r3,r0			/* Gets borrow if byte = 0. */
	bicd	r5,r0			/* Clear original bits. */
	andd	r4,r0			/* See if borrow occurred. */
	cmpqd	0,r0
	bne	1f			/* See if this DWORD contained a 0. */
	movd	r5,0(r2)		/* Save away prev four bytes. */
	addd	4,r1			/* addd is faster then addqd here */
	addd	4,r2
	beq	0b


Ian