diff options
Diffstat (limited to 'arch/alpha/lib/csum_ipv6_magic.S')
| -rw-r--r-- | arch/alpha/lib/csum_ipv6_magic.S | 42 |
1 files changed, 31 insertions, 11 deletions
diff --git a/arch/alpha/lib/csum_ipv6_magic.S b/arch/alpha/lib/csum_ipv6_magic.S index d9ddb6e74..495375a1a 100644 --- a/arch/alpha/lib/csum_ipv6_magic.S +++ b/arch/alpha/lib/csum_ipv6_magic.S @@ -4,7 +4,7 @@ * * unsigned short csum_ipv6_magic(struct in6_addr *saddr, * struct in6_addr *daddr, - * __u16 len, + * __u32 len, * unsigned short proto, * unsigned int csum); */ @@ -18,54 +18,74 @@ csum_ipv6_magic: ldq $0,0($16) # e0 : load src & dst addr words zapnot $20,15,$20 # .. e1 : zero extend incoming csum - extwh $18,7,$4 # e0 : byte swap len & proto while we wait + extqh $18,7,$4 # e0 : byte swap len & proto while we wait ldq $1,8($16) # .. e1 : - extbl $18,1,$18 # e0 : + + extbl $18,1,$5 # e0 : ldq $2,0($17) # .. e1 : - extwh $19,7,$5 # e0 : + extbl $18,2,$6 # e0 : ldq $3,8($17) # .. e1 : - extbl $19,1,$19 # e0 : - or $18,$4,$18 # .. e1 : - addq $20,$0,$20 # e0 : begin summing the words - or $19,$5,$19 # .. e1 : - sll $18,48,$18 # e0 : + + extbl $18,3,$18 # e0 : + sra $4,32,$4 # e0 : + sll $5,16,$5 # e0 : + addq $20,$0,$20 # .. e1 : begin summing the words + + sll $6,8,$6 # e0 : cmpult $20,$0,$0 # .. e1 : + extwh $19,7,$7 # e0 : + or $4,$18,$18 # .. e1 : + + extbl $19,1,$19 # e0 : + or $5,$6,$5 # .. e1 : + or $18,$5,$18 # e0 : len complete + or $19,$7,$19 # .. e1 : + sll $19,48,$19 # e0 : addq $20,$1,$20 # .. e1 : - sra $18,32,$18 # e0 : len complete - cmpult $20,$1,$1 # .. e1 : sra $19,32,$19 # e0 : proto complete + cmpult $20,$1,$1 # .. e1 : + + nop # e0 : addq $20,$2,$20 # .. e1 : cmpult $20,$2,$2 # e0 : addq $20,$3,$20 # .. e1 : + cmpult $20,$3,$3 # e0 : addq $20,$18,$20 # .. e1 : cmpult $20,$18,$18 # e0 : addq $20,$19,$20 # .. e1 : + cmpult $20,$19,$19 # e0 : addq $0,$1,$0 # .. e1 : merge the carries back into the csum addq $2,$3,$2 # e0 : addq $18,$19,$18 # .. e1 : + addq $0,$2,$0 # e0 : addq $20,$18,$20 # .. e1 : addq $0,$20,$0 # e0 : unop # : + extwl $0,2,$2 # e0 : begin folding the 64-bit value zapnot $0,3,$3 # .. e1 : extwl $0,4,$1 # e0 : addq $2,$3,$3 # .. e1 : + extwl $0,6,$0 # e0 : addq $3,$1,$3 # .. e1 : addq $0,$3,$0 # e0 : unop # : + extwl $0,2,$1 # e0 : fold 18-bit value zapnot $0,3,$0 # .. e1 : addq $0,$1,$0 # e0 : unop # : + extwl $0,2,$1 # e0 : fold 17-bit value zapnot $0,3,$0 # .. e1 : addq $0,$1,$0 # e0 : not $0,$0 # e1 : and compliment. + zapnot $0,3,$0 # e0 : ret # .. e1 : |