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authorRalf Baechle <ralf@linux-mips.org>1999-11-19 23:22:59 +0000
committerRalf Baechle <ralf@linux-mips.org>1999-11-19 23:22:59 +0000
commit0458ce25ec4e796cc0ac4421e0f2ad2d1c60688e (patch)
treed5050ce4c3c4ab07f7bb5e1cd89ce8d8cc48db44 /include/asm-mips64/checksum.h
parent97f7daf8ea67841c55c3daa8e55735c04ae2195b (diff)
Fix MIPS64 IP checksums. Hey guys, IRIX is spitting tons of bad
checksums, Linux/MIPS64 doesn't :-)
Diffstat (limited to 'include/asm-mips64/checksum.h')
-rw-r--r--include/asm-mips64/checksum.h135
1 files changed, 64 insertions, 71 deletions
diff --git a/include/asm-mips64/checksum.h b/include/asm-mips64/checksum.h
index 9db6a989d..5c928cfb5 100644
--- a/include/asm-mips64/checksum.h
+++ b/include/asm-mips64/checksum.h
@@ -1,4 +1,4 @@
-/* $Id$
+/* $Id: checksum.h,v 1.3 1999/11/19 20:35:48 ralf Exp $
*
* This file is subject to the terms and conditions of the GNU General Public
* License. See the file "COPYING" in the main directory of this archive
@@ -58,12 +58,12 @@ csum_fold(unsigned int sum)
{
__asm__("
.set noat
- sll $1,%0,16
- addu %0,$1
- sltu $1,%0,$1
- srl %0,%0,16
- addu %0,$1
- xori %0,0xffff
+ sll $1, %0, 16
+ addu %0, $1
+ sltu $1, %0, $1
+ srl %0, %0, 16
+ addu %0, $1
+ xori %0, 0xffff
.set at"
: "=r" (sum)
: "0" (sum)
@@ -94,11 +94,10 @@ ip_fast_csum(unsigned char * iph, unsigned int ihl)
.set noat
lw %0, (%1)
subu %2, 4
- #blez %2, 2f
- sll %2, 2 # delay slot
+ dsll %2, 2
lw %3, 4(%1)
- daddu %2, %1 # delay slot
+ daddu %2, %1
addu %0, %3
sltu $1, %0, %3
lw %3, 8(%1)
@@ -116,7 +115,7 @@ ip_fast_csum(unsigned char * iph, unsigned int ihl)
addu %0, %3
sltu $1, %0, %3
bne %2, %1, 1b
- addu %0, $1 # delay slot
+ addu %0, $1
2: .set at
.set reorder"
@@ -137,26 +136,20 @@ csum_tcpudp_nofold(unsigned long saddr, unsigned long daddr,
{
__asm__("
.set noat
- addu %0,%2
- sltu $1,%0,%2
- addu %0,$1
-
- addu %0,%3
- sltu $1,%0,%3
- addu %0,$1
-
- addu %0,%4
- sltu $1,%0,%4
- addu %0,$1
+ daddu %0, %2
+ daddu %0, %3
+ daddu %0, %4
+ dsll32 $1, %0, 0
+ daddu %0, $1 # never results in an overflow
+ dsrl32 %0, %0, 0
.set at"
: "=r" (sum)
- : "0" (daddr), "r"(saddr),
+ : "0" (sum), "r"(saddr), "r" (daddr),
#ifdef __MIPSEL__
- "r" ((ntohs(len)<<16)+proto*256),
+ "r" ((ntohs(len)<<16)+proto*256)
#else
- "r" (((proto)<<16)+len),
+ "r" (((proto)<<16)+len)
#endif
- "r"(sum)
: "$1");
return sum;
@@ -191,51 +184,51 @@ csum_ipv6_magic(struct in6_addr *saddr, struct in6_addr *daddr, __u16 len,
__asm__("
.set noreorder
.set noat
- addu %0,%5 # proto (long in network byte order)
- sltu $1,%0,%5
- addu %0,$1
-
- addu %0,%6 # csum
- sltu $1,%0,%6
- lw %1,0(%2) # four words source address
- addu %0,$1
- addu %0,%1
- sltu $1,%0,$1
-
- lw %1,4(%2)
- addu %0,$1
- addu %0,%1
- sltu $1,%0,$1
-
- lw %1,8(%2)
- addu %0,$1
- addu %0,%1
- sltu $1,%0,$1
-
- lw %1,12(%2)
- addu %0,$1
- addu %0,%1
- sltu $1,%0,$1
-
- lw %1,0(%3)
- addu %0,$1
- addu %0,%1
- sltu $1,%0,$1
-
- lw %1,4(%3)
- addu %0,$1
- addu %0,%1
- sltu $1,%0,$1
-
- lw %1,8(%3)
- addu %0,$1
- addu %0,%1
- sltu $1,%0,$1
-
- lw %1,12(%3)
- addu %0,$1
- addu %0,%1
- sltu $1,%0,$1
+ addu %0, %5 # proto (long in network byte order)
+ sltu $1, %0, %5
+ addu %0, $1
+
+ addu %0, %6 # csum
+ sltu $1, %0, %6
+ lw %1, 0(%2) # four words source address
+ addu %0, $1
+ addu %0, %1
+ sltu $1, %0, $1
+
+ lw %1, 4(%2)
+ addu %0, $1
+ addu %0, %1
+ sltu $1, %0, $1
+
+ lw %1, 8(%2)
+ addu %0, $1
+ addu %0, %1
+ sltu $1, %0, $1
+
+ lw %1, 12(%2)
+ addu %0, $1
+ addu %0, %1
+ sltu $1, %0, $1
+
+ lw %1, 0(%3)
+ addu %0, $1
+ addu %0, %1
+ sltu $1, %0, $1
+
+ lw %1, 4(%3)
+ addu %0, $1
+ addu %0, %1
+ sltu $1, %0, $1
+
+ lw %1, 8(%3)
+ addu %0, $1
+ addu %0, %1
+ sltu $1, %0, $1
+
+ lw %1, 12(%3)
+ addu %0, $1
+ addu %0, %1
+ sltu $1, %0, $1
.set noat
.set noreorder"
: "=r" (sum), "=r" (proto)