C6X: library code

Original port to early 2.6 kernel using TI COFF toolchain.
Brought up to date by Mark Salter <msalter@redhat.com>

Signed-off-by: Aurelien Jacquiot <a-jacquiot@ti.com>
Signed-off-by: Mark Salter <msalter@redhat.com>
Acked-by: Arnd Bergmann <arnd@arndb.de>

1 files changed, 46 insertions, 0 deletions

diff --git a/arch/c6x/lib/divremi.S b/arch/c6x/lib/divremi.S
new file mode 100644
index 000000000000..64bc5aa95ad3
--- /dev/null
+++ b/arch/c6x/lib/divremi.S
@@ -0,0 +1,46 @@
+;;  Copyright 2010  Free Software Foundation, Inc.
+;;  Contributed by Bernd Schmidt <bernds@codesourcery.com>.
+;;
+;; This program is free software; you can redistribute it and/or modify
+;; it under the terms of the GNU General Public License as published by
+;; the Free Software Foundation; either version 2 of the License, or
+;; (at your option) any later version.
+;;
+;; This program is distributed in the hope that it will be useful,
+;; but WITHOUT ANY WARRANTY; without even the implied warranty of
+;; MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+;; GNU General Public License for more details.
+;;
+;; You should have received a copy of the GNU General Public License
+;; along with this program; if not, write to the Free Software
+;; Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA.
+
+#include <linux/linkage.h>
+
+        .text
+ENTRY(__c6xabi_divremi)
+        stw     .d2t2   B3, *B15--[2]
+||      cmpgt   .l1     0, A4, A1
+||      cmpgt   .l2     0, B4, B2
+||      mv      .s1     A4, A5
+||      call    .s2     __c6xabi_divu
+
+   [A1] neg     .l1     A4, A4
+|| [B2] neg     .l2     B4, B4
+||      xor     .s2x    B2, A1, B0
+||      mv      .d2     B4, B2
+
+   [B0] addkpc  .s2     _divu_ret_1, B3, 1
+  [!B0] addkpc  .s2     _divu_ret_2, B3, 1
+        nop     2
+_divu_ret_1:
+        neg     .l1     A4, A4
+_divu_ret_2:
+        ldw     .d2t2   *++B15[2], B3
+
+        mpy32   .m1x    A4, B2, A6
+        nop             3
+        ret     .s2     B3
+        sub     .l1     A5, A6, A5
+        nop     4
+ENDPROC(__c6xabi_divremi)