Reorganisation of the source tree

[ghc-hetmet.git] / rts / gmp / mpn / m68k / mc68020 / addmul_1.S

diff --git a/rts/gmp/mpn/m68k/mc68020/addmul_1.S b/rts/gmp/mpn/m68k/mc68020/addmul_1.S
new file mode 100644 (file)
index 0000000..6638115
--- /dev/null
+++ b/rts/gmp/mpn/m68k/mc68020/addmul_1.S
@@ -0,0 +1,83 @@
+/* mc68020 __gmpn_addmul_1 -- Multiply a limb vector with a limb and add
+   the result to a second limb vector.
+
+Copyright (C) 1992, 1994, 1996, 1999, 2000 Free Software Foundation, Inc.
+
+This file is part of the GNU MP Library.
+
+The GNU MP Library 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.
+
+The GNU MP Library 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 the GNU MP Library; see the file COPYING.LIB.  If not, write to
+the Free Software Foundation, Inc., 59 Temple Place - Suite 330, Boston,
+MA 02111-1307, USA. */
+
+/*
+  INPUT PARAMETERS
+  res_ptr      (sp + 4)
+  s1_ptr       (sp + 8)
+  s1_size      (sp + 12)
+  s2_limb      (sp + 16)
+*/
+
+#include "asm-syntax.h"
+
+       TEXT
+       ALIGN
+       GLOBL   C_SYMBOL_NAME(__gmpn_addmul_1)
+
+C_SYMBOL_NAME(__gmpn_addmul_1:)
+PROLOG(__gmpn_addmul_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)
+       addl    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)
+       addl    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(__gmpn_addmul_1)