patch-2.1.51 linux/arch/ppc/lib/cksum_support.S

• Lines: 126
• Date: Wed Dec 31 16:00:00 1969
• Orig file: v2.1.50/linux/arch/ppc/lib/cksum_support.S
• Orig date: Mon May 27 02:00:58 1996

diff -u --recursive --new-file v2.1.50/linux/arch/ppc/lib/cksum_support.S linux/arch/ppc/lib/cksum_support.S
@@ -1,125 +0,0 @@
-/*
- * This module contains the PowerPC interrupt fielders
- * set of code at specific locations, based on function
- */
-
-#include <linux/sys.h>
-#include "../kernel/ppc_asm.tmpl"
-
-_TEXT()
-
-/*
- * Compute IP checksums
- *   _ip_fast_csum(buf, len) -- Optimized for IP header
- *   _ip_compute_csum(buf, len)
- */
-
-_GLOBAL(_ip_fast_csum)
-	li	r0,0
-	addic	r0,r0,0		/* Clear initial carry */
-	lwz	r4,0(r3)
-	lwz	r5,4(r3)
-	adde	r0,r0,r4
-	lwz	r4,8(r3)
-	adde	r0,r0,r5
-	lwz	r5,12(r3)
-	adde	r0,r0,r4
-	lwz	r4,16(r3)
-	adde	r0,r0,r5
-	adde	r0,r0,r4
-	mr	r3,r0
-	andi.	r3,r3,0xFFFF
-	srwi	r0,r0,16
-	adde	r3,r3,r0
-	andis.	r0,r3,1
-	beq	10f
-	addi	r3,r3,1
-10:	not	r3,r3
-	andi.	r3,r3,0xFFFF
-	blr
-
-_GLOBAL(_ip_compute_csum)
-	li	r0,0
-	addic	r0,r0,0
-finish_ip_csum:	
-	subi	r3,r3,4
-	andi.	r5,r3,2		/* Align buffer to longword boundary */
-	beq	10f
-	lhz	r5,4(r3)
-	adde	r0,r0,r5
-	addi	r3,r3,2
-	subi	r4,r4,2
-10:	cmpi	0,r4,16		/* unrolled loop - 16 bytes at a time */
-	blt	20f
-	lwz	r5,4(r3)
-	lwz	r6,8(r3)
-	adde	r0,r0,r5
-	lwz	r5,12(r3)
-	adde	r0,r0,r6
-	lwzu	r6,16(r3)
-	adde	r0,r0,r5
-	adde	r0,r0,r6
-	subi	r4,r4,16
-	b	10b
-20:	cmpi	0,r4,4
-	blt	30f
-	lwzu	r5,4(r3)
-	adde	r0,r0,r5
-	subi	r4,r4,4
-	b	20b
-30:	cmpi	0,r4,2
-	blt	40f
-	lhz	r5,4(r3)
-	addi	r3,r3,2
-	adde	r0,r0,r5
-	subi	r4,r4,2
-40:	cmpi	0,r4,1
-	bne	50f
-	lbz	r5,4(r3)
-	slwi	r5,r5,8		/* Upper byte of word */
-	adde	r0,r0,r5
-50:	mr	r3,r0
-	andi.	r3,r3,0xFFFF
-	srwi	r0,r0,16
-	adde	r3,r3,r0
-	andis.	r0,r3,1
-	beq	60f
-	addi	r3,r3,1
-60:	not	r3,r3
-	andi.	r3,r3,0xFFFF
-	blr
-
-_GLOBAL(_udp_check)
-	addc	r0,r5,r6	/* Add in header fields */
-	adde	r0,r0,r7
-	b	finish_ip_csum	
-
-_GLOBAL(_tcp_check)
-	addc	r0,r5,r6	/* Add in header fields */
-	adde	r0,r0,r7
-	b	finish_ip_csum	
-
-_GLOBAL(_csum_partial)
-	li	r0,0
-	addc	r0,r5,r0
-	b	finish_ip_csum	
-
-/*
- * Compute 16 bit sum:
- *   _csum_tcpudp_magic(int saddr, int daddr, int sum, int proto)
- */	
-_GLOBAL(_csum_tcpudp_magic)
-	addc	r0,r3,r4
-	adde	r0,r0,r5
-	adde	r0,r0,r6
-	mr	r3,r0
-	andi.	r3,r3,0xFFFF
-	srwi	r0,r0,16
-	adde	r3,r3,r0
-	andis.	r0,r3,1			/* Carry out of 16 bits? */
-	beq	10f
-	addi	r3,r3,1
-10:	not	r3,r3
-	andi.	r3,r3,0xFFFF
-	blr
-