diff options
Diffstat (limited to 'include/asm-s390')
| -rw-r--r-- | include/asm-s390/checksum.h | 59 |
1 files changed, 15 insertions, 44 deletions
diff --git a/include/asm-s390/checksum.h b/include/asm-s390/checksum.h index 0a3cd7ec8451..d5a8e7c1477c 100644 --- a/include/asm-s390/checksum.h +++ b/include/asm-s390/checksum.h | |||
| @@ -121,50 +121,21 @@ csum_tcpudp_nofold(__be32 saddr, __be32 daddr, | |||
| 121 | unsigned short len, unsigned short proto, | 121 | unsigned short len, unsigned short proto, |
| 122 | __wsum sum) | 122 | __wsum sum) |
| 123 | { | 123 | { |
| 124 | #ifndef __s390x__ | 124 | __u32 csum = (__force __u32)sum; |
| 125 | asm volatile( | 125 | |
| 126 | " alr %0,%1\n" /* sum += saddr */ | 126 | csum += (__force __u32)saddr; |
| 127 | " brc 12,0f\n" | 127 | if (csum < (__force __u32)saddr) |
| 128 | " ahi %0,1\n" /* add carry */ | 128 | csum++; |
| 129 | "0:" | 129 | |
| 130 | : "+&d" (sum) : "d" (saddr) : "cc"); | 130 | csum += (__force __u32)daddr; |
| 131 | asm volatile( | 131 | if (csum < (__force __u32)daddr) |
| 132 | " alr %0,%1\n" /* sum += daddr */ | 132 | csum++; |
| 133 | " brc 12,1f\n" | 133 | |
| 134 | " ahi %0,1\n" /* add carry */ | 134 | csum += len + proto; |
| 135 | "1:" | 135 | if (csum < len + proto) |
| 136 | : "+&d" (sum) : "d" (daddr) : "cc"); | 136 | csum++; |
| 137 | asm volatile( | 137 | |
| 138 | " alr %0,%1\n" /* sum += len + proto */ | 138 | return (__force __wsum)csum; |
| 139 | " brc 12,2f\n" | ||
| 140 | " ahi %0,1\n" /* add carry */ | ||
| 141 | "2:" | ||
| 142 | : "+&d" (sum) | ||
| 143 | : "d" (len + proto) | ||
| 144 | : "cc"); | ||
| 145 | #else /* __s390x__ */ | ||
| 146 | asm volatile( | ||
| 147 | " lgfr %0,%0\n" | ||
| 148 | " algr %0,%1\n" /* sum += saddr */ | ||
| 149 | " brc 12,0f\n" | ||
| 150 | " aghi %0,1\n" /* add carry */ | ||
| 151 | "0: algr %0,%2\n" /* sum += daddr */ | ||
| 152 | " brc 12,1f\n" | ||
| 153 | " aghi %0,1\n" /* add carry */ | ||
| 154 | "1: algfr %0,%3\n" /* sum += len + proto */ | ||
| 155 | " brc 12,2f\n" | ||
| 156 | " aghi %0,1\n" /* add carry */ | ||
| 157 | "2: srlg 0,%0,32\n" | ||
| 158 | " alr %0,0\n" /* fold to 32 bits */ | ||
| 159 | " brc 12,3f\n" | ||
| 160 | " ahi %0,1\n" /* add carry */ | ||
| 161 | "3: llgfr %0,%0" | ||
| 162 | : "+&d" (sum) | ||
| 163 | : "d" (saddr), "d" (daddr), | ||
| 164 | "d" (len + proto) | ||
| 165 | : "cc", "0"); | ||
| 166 | #endif /* __s390x__ */ | ||
| 167 | return sum; | ||
| 168 | } | 139 | } |
| 169 | 140 | ||
| 170 | /* | 141 | /* |