powerpc/lib/checksum_64.S

1 /* SPDX-License-Identifier: GPL-2.0-or-later */
3  * This file contains assembly-language implementations
4  * of IP-style 1's complement checksum routines.
6  *    Copyright (C) 1995-1996 Gary Thomas (gdt@linuxppc.org)
19  * and adds in "sum" (32-bit).
35 	rldicl. r6,r3,64-1,64-2		/* r6 = (r3 >> 1) & 0x3 */
62 	stdu	r1,-STACKFRAMESIZE(r1)
83 	ld	r14,40(r3)
110 	ld	r14,40(r3)
176 	rldicl	r4,r0,32,0		/* fold two 32 bit halves together */
205  * and adds in 0xffffffff (32-bit), while copying the block to dst.
211 	li	r6,-1
226 	rldicl. r6,r3,64-1,64-2		/* r6 = (r3 >> 1) & 0x3 */
255 	stdu	r1,-STACKFRAMESIZE(r1)
276 source;	ld	r14,40(r3)
293 dest;	std	r14,40(r4)
312 source;	ld	r14,40(r3)
329 dest;	std	r14,40(r4)
398 	rldicl	r4,r0,32,0		/* fold two 32 bit halves together */
435 	rotldi  r3, r0, 32		/* fold two 32 bit halves together */
438 	rotlwi	r3, r0, 16		/* fold two 16 bit halves together */