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