1 files changed, 97 insertions, 0 deletions
diff --git a/libgcrypt-1.4.6/mpi/m68k/mc68020/mpih-mul3.S b/libgcrypt-1.4.6/mpi/m68k/mc68020/mpih-mul3.S
new file mode 100644
index 0000000..e958ef6
--- /dev/null
+++ b/libgcrypt-1.4.6/mpi/m68k/mc68020/mpih-mul3.S
@@ -0,0 +1,97 @@
+/* mc68020 __mpn_submul_1 -- Multiply a limb vector with a limb and subtract
+ *                           the result from a second limb vector.
+ *
+ *      Copyright (C) 1992, 1994, 1996, 1998, 
+ *                    2001, 2002 Free Software Foundation, Inc.
+ *       
+ * This file is part of Libgcrypt.
+ *
+ * Libgcrypt is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU Lesser General Public License as
+ * published by the Free Software Foundation; either version 2.1 of
+ * the License, or (at your option) any later version.
+ *
+ * Libgcrypt 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 Lesser General Public License for more details.
+ *
+ * You should have received a copy of the GNU Lesser 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
+ *
+ * Note: This code is heavily based on the GNU MP Library.
+ *	 Actually it's the same code with only minor changes in the
+ *	 way the data is stored; this is to support the abstraction
+ *	 of an optional secure memory allocation which may be used
+ *	 to avoid revealing of sensitive data due to paging etc.
+ */
+
+
+
+
+#include "sysdep.h"
+#include "asm-syntax.h"
+
+/*******************
+ * mpi_limb_t
+ * _gcry_mpih_submul_1( mpi_ptr_t res_ptr,      (sp + 4)
+ *		     mpi_ptr_t s1_ptr,	     (sp + 8)
+ *		     mpi_size_t s1_size,     (sp + 12)
+ *		     mpi_limb_t s2_limb)     (sp + 16)
+ */
+
+
+	TEXT
+	ALIGN
+	GLOBL	C_SYMBOL_NAME(_gcry_mpih_submul_1)
+
+C_SYMBOL_NAME(_gcry_mpih_submul_1:)
+PROLOG(_gcry_mpih_submul_1)
+
+#define res_ptr a0
+#define s1_ptr a1
+#define s1_size d2
+#define s2_limb d4
+
+/* Save used registers on the stack.  */
+	moveml	R(d2)-R(d5),MEM_PREDEC(sp)
+
+/* Copy the arguments to registers.  Better use movem?	*/
+	movel	MEM_DISP(sp,20),R(res_ptr)
+	movel	MEM_DISP(sp,24),R(s1_ptr)
+	movel	MEM_DISP(sp,28),R(s1_size)
+	movel	MEM_DISP(sp,32),R(s2_limb)
+
+	eorw	#1,R(s1_size)
+	clrl	R(d1)
+	clrl	R(d5)
+	lsrl	#1,R(s1_size)
+	bcc	L(L1)
+	subql	#1,R(s1_size)
+	subl	R(d0),R(d0)	/* (d0,cy) <= (0,0) */
+
+L(Loop:)
+	movel	MEM_POSTINC(s1_ptr),R(d3)
+	mulul	R(s2_limb),R(d1):R(d3)
+	addxl	R(d0),R(d3)
+	addxl	R(d5),R(d1)
+	subl	R(d3),MEM_POSTINC(res_ptr)
+L(L1:)	movel	MEM_POSTINC(s1_ptr),R(d3)
+	mulul	R(s2_limb),R(d0):R(d3)
+	addxl	R(d1),R(d3)
+	addxl	R(d5),R(d0)
+	subl	R(d3),MEM_POSTINC(res_ptr)
+
+	dbf	R(s1_size),L(Loop)
+	addxl	R(d5),R(d0)
+	subl	#0x10000,R(s1_size)
+	bcc	L(Loop)
+
+/* Restore used registers from stack frame.  */
+	moveml	MEM_POSTINC(sp),R(d2)-R(d5)
+
+	rts
+EPILOG(_gcry_mpih_submul_1)
+
+