| /* SPDX-License-Identifier: GPL-2.0 */ |
| /* |
| * Contributed by Richard Henderson <rth@tamu.edu> |
| * |
| * unsigned short csum_ipv6_magic(struct in6_addr *saddr, |
| * struct in6_addr *daddr, __u32 len, |
| * unsigned short proto, unsigned int csum); |
| * |
| * Misalignment handling (which costs 16 instructions / 8 cycles) |
| * added by Ivan Kokshaysky <ink@jurassic.park.msu.ru> |
| */ |
| #include <asm/export.h> |
| .globl csum_ipv6_magic |
| .align 4 |
| .ent csum_ipv6_magic |
| .frame $30, 0, $26, 0 |
| csum_ipv6_magic: |
| .prologue 0 |
| |
| ldl_u $0, 0($16) |
| zapnot $20, 15, $20 |
| exthl $18, 1, $4 |
| ldl_u $21, 7($16) |
| |
| extlb $18, 1, $5 |
| ldl_u $1, 8($16) |
| extlb $18, 2, $6 |
| ldl_u $22, 15($16) |
| |
| extlb $18, 3, $18 |
| ldl_u $2, 0($17) |
| sra $4, 32, $4 |
| ldl_u $23, 7($17) |
| |
| extll $0, $16, $0 |
| ldl_u $3, 8($17) |
| exthl $21, $16, $21 |
| ldl_u $24, 15($17) |
| |
| sll $5, 16, $5 |
| or $0, $21, $0 |
| extll $1, $16, $1 |
| addl $20, $0, $20 |
| |
| exthl $22, $16, $22 |
| cmpult $20, $0, $0 |
| sll $6, 8, $6 |
| or $1, $22, $1 |
| |
| extll $2, $17, $2 |
| or $4, $18, $18 |
| exthl $23, $17, $23 |
| or $5, $6, $5 |
| |
| extll $3, $17, $3 |
| or $2, $23, $2 |
| exthl $24, $17, $24 |
| or $18, $5, $18 |
| |
| exthh $19, 7, $7 |
| or $3, $24, $3 |
| extlb $19, 1, $19 |
| addl $20, $1, $20 |
| |
| or $19, $7, $19 |
| cmpult $20, $1, $1 |
| sll $19, 48, $19 |
| |
| sra $19, 32, $19 |
| addl $20, $2, $20 |
| cmpult $20, $2, $2 |
| addl $20, $3, $20 |
| |
| cmpult $20, $3, $3 |
| addl $20, $18, $20 |
| cmpult $20, $18, $18 |
| addl $20, $19, $20 |
| |
| cmpult $20, $19, $19 |
| addl $0, $1, $0 |
| addl $2, $3, $2 |
| addl $18, $19, $18 |
| |
| addl $0, $2, $0 |
| addl $20, $18, $20 |
| addl $0, $20, $0 |
| unop |
| |
| extlh $0, 2, $2 |
| zapnot $0, 3, $3 |
| extlh $0, 4, $1 |
| addl $2, $3, $3 |
| |
| extlh $0, 6, $0 |
| addl $3, $1, $3 |
| addl $0, $3, $0 |
| unop |
| |
| extlh $0, 2, $1 |
| zapnot $0, 3, $0 |
| addl $0, $1, $0 |
| unop |
| |
| extlh $0, 2, $1 |
| zapnot $0, 3, $0 |
| addl $0, $1, $0 |
| not $0, $0 |
| |
| zapnot $0, 3, $0 |
| ret |
| |
| .end csum_ipv6_magic |
| EXPORT_SYMBOL(csum_ipv6_magic) |
