Linux-2.6.12-rc2v2.6.12-rc2

Initial git repository build. I'm not bothering with the full history,
even though we have it. We can create a separate "historical" git
archive of that later if we want to, and in the meantime it's about
3.2GB when imported into git - space that would just make the early
git days unnecessarily complicated, when we don't have a lot of good
infrastructure for it.

Let it rip!

1 files changed, 92 insertions, 0 deletions

diff --git a/arch/alpha/lib/csum_ipv6_magic.S b/arch/alpha/lib/csum_ipv6_magic.S
new file mode 100644
index 000000000000..e09748dbf2ed
--- /dev/null
+++ b/arch/alpha/lib/csum_ipv6_magic.S
@@ -0,0 +1,92 @@
+/*
+ * arch/alpha/lib/csum_ipv6_magic.S
+ * 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);
+ */
+
+        .globl csum_ipv6_magic
+        .align 4
+        .ent csum_ipv6_magic
+        .frame $30,0,$26,0
+csum_ipv6_magic:
+        .prologue 0
+
+        ldq     $0,0($16)       # e0    : load src & dst addr words
+        zapnot  $20,15,$20      # .. e1 : zero extend incoming csum
+        extqh   $18,1,$4        # e0    : byte swap len & proto while we wait
+        ldq     $1,8($16)       # .. e1 :
+
+        extbl   $18,1,$5        # e0    :
+        ldq     $2,0($17)       # .. e1 :
+        extbl   $18,2,$6        # e0    :
+        ldq     $3,8($17)       # .. e1 :
+
+        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     $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 complement.
+
+        zapnot  $0,3,$0         # e0    :
+        ret                     # .. e1 :
+
+        .end csum_ipv6_magic