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, 81 insertions, 0 deletions

diff --git a/arch/sparc/lib/strlen.S b/arch/sparc/lib/strlen.S
new file mode 100644
index 000000000000..ed9a763368cd
--- /dev/null
+++ b/arch/sparc/lib/strlen.S
@@ -0,0 +1,81 @@
+/* strlen.S: Sparc optimized strlen code
+ * Hand optimized from GNU libc's strlen
+ * Copyright (C) 1991,1996 Free Software Foundation
+ * Copyright (C) 1996 David S. Miller (davem@caip.rutgers.edu)
+ * Copyright (C) 1996 Jakub Jelinek (jj@sunsite.mff.cuni.cz)
+ */
+
+#define LO_MAGIC 0x01010101
+#define HI_MAGIC 0x80808080
+
+0:
+        ldub    [%o0], %o5
+        cmp     %o5, 0
+        be      1f
+         add    %o0, 1, %o0
+        andcc   %o0, 3, %g0
+        be      4f
+         or     %o4, %lo(HI_MAGIC), %o3
+        ldub    [%o0], %o5
+        cmp     %o5, 0
+        be      2f
+         add    %o0, 1, %o0
+        andcc   %o0, 3, %g0
+        be      5f
+         sethi  %hi(LO_MAGIC), %o4
+        ldub    [%o0], %o5
+        cmp     %o5, 0
+        be      3f
+         add    %o0, 1, %o0
+        b       8f
+         or     %o4, %lo(LO_MAGIC), %o2
+1:
+        retl
+         mov    0, %o0
+2:
+        retl
+         mov    1, %o0
+3:
+        retl
+         mov    2, %o0
+
+        .align 4
+        .global strlen
+strlen:
+        mov     %o0, %o1
+        andcc   %o0, 3, %g0
+        bne     0b
+         sethi  %hi(HI_MAGIC), %o4
+        or      %o4, %lo(HI_MAGIC), %o3
+4:
+        sethi   %hi(LO_MAGIC), %o4
+5:
+        or      %o4, %lo(LO_MAGIC), %o2
+8:
+        ld      [%o0], %o5
+2:
+        sub     %o5, %o2, %o4
+        andcc   %o4, %o3, %g0
+        be      8b
+         add    %o0, 4, %o0
+
+        /* Check every byte. */
+        srl     %o5, 24, %g5
+        andcc   %g5, 0xff, %g0
+        be      1f
+         add    %o0, -4, %o4
+        srl     %o5, 16, %g5
+        andcc   %g5, 0xff, %g0
+        be      1f
+         add    %o4, 1, %o4
+        srl     %o5, 8, %g5
+        andcc   %g5, 0xff, %g0
+        be      1f
+         add    %o4, 1, %o4
+        andcc   %o5, 0xff, %g0
+        bne,a   2b
+         ld     [%o0], %o5
+        add     %o4, 1, %o4
+1:
+        retl
+         sub    %o4, %o1, %o0