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, 129 insertions, 0 deletions

diff --git a/arch/sparc64/lib/memscan.S b/arch/sparc64/lib/memscan.S
new file mode 100644
index 000000000000..5e72d4911417
--- /dev/null
+++ b/arch/sparc64/lib/memscan.S
@@ -0,0 +1,129 @@
+/* $Id: memscan.S,v 1.3 2000/01/31 04:59:10 davem Exp $
+ * memscan.S: Optimized memscan for Sparc64.
+ *
+ * Copyright (C) 1997,1998 Jakub Jelinek (jj@ultra.linux.cz)
+ * Copyright (C) 1998 David S. Miller (davem@redhat.com)
+ */
+
+#define HI_MAGIC        0x8080808080808080
+#define LO_MAGIC        0x0101010101010101
+#define ASI_PL          0x88
+
+        .text
+        .align  32
+        .globl          __memscan_zero, __memscan_generic
+        .globl          memscan
+
+__memscan_zero:
+        /* %o0 = bufp, %o1 = size */
+        brlez,pn        %o1, szzero
+         andcc          %o0, 7, %g0
+        be,pt           %icc, we_are_aligned
+         sethi          %hi(HI_MAGIC), %o4
+        ldub            [%o0], %o5
+1:      subcc           %o1, 1, %o1
+        brz,pn          %o5, 10f
+         add            %o0, 1, %o0
+
+        be,pn           %xcc, szzero
+         andcc          %o0, 7, %g0
+        bne,a,pn        %icc, 1b
+         ldub           [%o0], %o5
+we_are_aligned:
+        ldxa            [%o0] ASI_PL, %o5
+        or              %o4, %lo(HI_MAGIC), %o3
+        sllx            %o3, 32, %o4
+        or              %o4, %o3, %o3
+
+        srlx            %o3, 7, %o2
+msloop:
+        sub             %o1, 8, %o1
+        add             %o0, 8, %o0
+        sub             %o5, %o2, %o4
+        xor             %o4, %o5, %o4
+        andcc           %o4, %o3, %g3
+        bne,pn          %xcc, check_bytes
+         srlx           %o4, 32, %g3
+
+        brgz,a,pt       %o1, msloop
+         ldxa           [%o0] ASI_PL, %o5
+check_bytes:
+        bne,a,pn        %icc, 2f
+         andcc          %o5, 0xff, %g0
+        add             %o0, -5, %g2
+        ba,pt           %xcc, 3f
+         srlx           %o5, 32, %g7
+
+2:      srlx            %o5, 8, %g7
+        be,pn           %icc, 1f
+         add            %o0, -8, %g2
+        andcc           %g7, 0xff, %g0
+        srlx            %g7, 8, %g7
+        be,pn           %icc, 1f
+         inc            %g2
+        andcc           %g7, 0xff, %g0
+
+        srlx            %g7, 8, %g7
+        be,pn           %icc, 1f
+         inc            %g2
+        andcc           %g7, 0xff, %g0
+        srlx            %g7, 8, %g7
+        be,pn           %icc, 1f
+         inc            %g2
+        andcc           %g3, %o3, %g0
+
+        be,a,pn         %icc, 2f
+         mov            %o0, %g2
+3:      andcc           %g7, 0xff, %g0
+        srlx            %g7, 8, %g7
+        be,pn           %icc, 1f
+         inc            %g2
+        andcc           %g7, 0xff, %g0
+        srlx            %g7, 8, %g7
+
+        be,pn           %icc, 1f
+         inc            %g2
+        andcc           %g7, 0xff, %g0
+        srlx            %g7, 8, %g7
+        be,pn           %icc, 1f
+         inc            %g2
+        andcc           %g7, 0xff, %g0
+        srlx            %g7, 8, %g7
+
+        be,pn           %icc, 1f
+         inc            %g2
+2:      brgz,a,pt       %o1, msloop
+         ldxa           [%o0] ASI_PL, %o5
+        inc             %g2
+1:      add             %o0, %o1, %o0
+        cmp             %g2, %o0
+        retl
+
+         movle          %xcc, %g2, %o0
+10:     retl
+         sub            %o0, 1, %o0
+szzero: retl
+         nop
+
+memscan:
+__memscan_generic:
+        /* %o0 = addr, %o1 = c, %o2 = size */
+        brz,pn          %o2, 3f
+         add            %o0, %o2, %o3
+        ldub            [%o0], %o5
+        sub             %g0, %o2, %o4
+1:
+        cmp             %o5, %o1
+        be,pn           %icc, 2f
+         addcc          %o4, 1, %o4
+        bne,a,pt        %xcc, 1b
+         ldub           [%o3 + %o4], %o5
+        retl
+        /* The delay slot is the same as the next insn, this is just to make it look more awful */
+2:
+         add            %o3, %o4, %o0
+        retl
+         sub            %o0, 1, %o0
+3:
+        retl
+         nop