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Commit 0b05e2d6 authored by LEROY Christophe's avatar LEROY Christophe Committed by Scott Wood
Browse files

powerpc/32: cacheable_memcpy becomes memcpy 



cacheable_memcpy uses dcbz instruction and is more efficient than
memcpy when the destination is in RAM. If the destination is in an
io area, memcpy_toio() is normally used, not memcpy

This patch renames memcpy as generic_memcpy, and renames
cacheable_memcpy as memcpy

On MPC885, we get approximatly 7% increase of the transfer rate
on an FTP reception

Signed-off-by: default avatarChristophe Leroy <christophe.leroy@c-s.fr>
Signed-off-by: default avatarScott Wood <scottwood@freescale.com>
parent c152f149

arch/powerpc/lib/copy_32.S

+8 −8
Original line number Diff line number Diff line
@@ -129,13 +129,18 @@ _GLOBAL(memset) 
 * We only use this version if the source and dest don't overlap.

 * -- paulus.

 */

_GLOBAL(cacheable_memcpy)

_GLOBAL(memmove)

	cmplw	0,r3,r4

	bgt	backwards_memcpy

	/* fall through */



_GLOBAL(memcpy)

	add	r7,r3,r5		/* test if the src & dst overlap */

	add	r8,r4,r5

	cmplw	0,r4,r7

	cmplw	1,r3,r8

	crand	0,0,4			/* cr0.lt &= cr1.lt */

	blt	memcpy			/* if regions overlap */

	blt	generic_memcpy		/* if regions overlap */



	addi	r4,r4,-4

	addi	r6,r3,-4
@@ -201,12 +206,7 @@ _GLOBAL(cacheable_memcpy) 
	bdnz	40b

65:	blr



_GLOBAL(memmove)

	cmplw	0,r3,r4

	bgt	backwards_memcpy

	/* fall through */



_GLOBAL(memcpy)

_GLOBAL(generic_memcpy)

	srwi.	r7,r5,3

	addi	r6,r3,-4

	addi	r4,r4,-4