initial blackfin support

1 files changed, 68 insertions, 0 deletions

diff --git a/arch/blackfin/lib/umodsi3.S b/arch/blackfin/lib/umodsi3.S
new file mode 100644
index 0000000000..363ccdf65e
--- /dev/null
+++ b/arch/blackfin/lib/umodsi3.S
@@ -0,0 +1,68 @@
+/*
+ * File:         arch/blackfin/lib/umodsi3.S
+ * Based on:
+ * Author:
+ *
+ * Created:
+ * Description:  libgcc1 routines for Blackfin 5xx
+ *
+ * Rev:          $Id: umodsi3.S 2769 2007-02-19 16:45:53Z hennerich $
+ *
+ * Modified:
+ *               Copyright 2004-2006 Analog Devices Inc.
+ *
+ * Bugs:         Enter bugs at http://blackfin.uclinux.org/
+ *
+ * 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, see the file COPYING, or write
+ * to the Free Software Foundation, Inc.,
+ * 51 Franklin St, Fifth Floor, Boston, MA  02110-1301  USA
+ */
+
+#ifdef CONFIG_ARITHMETIC_OPS_L1
+.section .l1.text
+#else
+.text
+#endif
+
+.extern ___udivsi3;
+.globl	___umodsi3
+___umodsi3:
+
+	CC=R0==0;
+	IF CC JUMP .LRETURN_R0;		/* Return 0, if NR == 0 */
+	CC= R1==0;
+	IF CC JUMP .LRETURN_ZERO_VAL;	/* Return 0, if DR == 0 */
+	CC=R0==R1;
+	IF CC JUMP .LRETURN_ZERO_VAL;	/* Return 0, if NR == DR */
+	CC = R1 == 1;
+	IF CC JUMP .LRETURN_ZERO_VAL;	/* Return 0, if  DR == 1 */
+	CC = R0<R1 (IU);
+	IF CC JUMP .LRETURN_R0;		/* Return dividend (R0),IF NR<DR */
+
+	[--SP] = (R7:6);		/* Push registers and */
+	[--SP] = RETS;			/* Return address */
+	R7 = R0;			/* Copy of R0 */
+	R6 = R1;
+	SP += -12;			/* Should always provide this space */
+	CALL ___udivsi3;		/* Compute unsigned quotient using ___udiv32()*/
+	SP += 12;
+	R0 *= R6;			/* Quotient * divisor */
+	R0 = R7 - R0;			/* Dividend - (quotient * divisor) */
+	RETS = [SP++];			/* Pop return address */
+	( R7:6) = [SP++];		/* And registers */
+	RTS;				/* Return remainder */
+.LRETURN_ZERO_VAL:
+	R0 = 0;
+.LRETURN_R0:
+	RTS;