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-rw-r--r--sysdeps/m68k/add_n.S75
1 files changed, 39 insertions, 36 deletions
diff --git a/sysdeps/m68k/add_n.S b/sysdeps/m68k/add_n.S
index ea7a4458ea..754af9f469 100644
--- a/sysdeps/m68k/add_n.S
+++ b/sysdeps/m68k/add_n.S
@@ -1,7 +1,7 @@
/* mc68020 __mpn_add_n -- Add two limb vectors of the same length > 0 and store
sum in a third limb vector.
-Copyright (C) 1992, 1994 Free Software Foundation, Inc.
+Copyright (C) 1992, 1994, 1996 Free Software Foundation, Inc.
This file is part of the GNU MP Library.
@@ -27,50 +27,53 @@ the Free Software Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA. */
size (sp + 12)
*/
+#include "sysdep.h"
#include "asm-syntax.h"
TEXT
ALIGN
- GLOBL ___mpn_add_n
+ GLOBL C_SYMBOL_NAME(__mpn_add_n)
-LAB(___mpn_add_n)
+C_SYMBOL_NAME(__mpn_add_n:)
+PROLOG(__mpn_add_n)
/* Save used registers on the stack. */
- INSN2(move,l ,MEM_PREDEC(sp),d2)
- INSN2(move,l ,MEM_PREDEC(sp),a2)
+ movel R(d2),MEM_PREDEC(sp)
+ movel R(a2),MEM_PREDEC(sp)
/* Copy the arguments to registers. Better use movem? */
- INSN2(move,l ,a2,MEM_DISP(sp,12))
- INSN2(move,l ,a0,MEM_DISP(sp,16))
- INSN2(move,l ,a1,MEM_DISP(sp,20))
- INSN2(move,l ,d2,MEM_DISP(sp,24))
-
- INSN2(eor,w ,d2,#1)
- INSN2(lsr,l ,d2,#1)
- bcc L1
- INSN2(subq,l ,d2,#1) /* clears cy as side effect */
-
-LAB(Loop)
- INSN2(move,l ,d0,MEM_POSTINC(a0))
- INSN2(move,l ,d1,MEM_POSTINC(a1))
- INSN2(addx,l ,d0,d1)
- INSN2(move,l ,MEM_POSTINC(a2),d0)
-LAB(L1) INSN2(move,l ,d0,MEM_POSTINC(a0))
- INSN2(move,l ,d1,MEM_POSTINC(a1))
- INSN2(addx,l ,d0,d1)
- INSN2(move,l ,MEM_POSTINC(a2),d0)
-
- dbf d2,Loop /* loop until 16 lsb of %4 == -1 */
- INSN2(subx,l ,d0,d0) /* d0 <= -cy; save cy as 0 or -1 in d0 */
- INSN2(sub,l ,d2,#0x10000)
- bcs L2
- INSN2(add,l ,d0,d0) /* restore cy */
- bra Loop
-
-LAB(L2)
- INSN1(neg,l ,d0)
+ movel MEM_DISP(sp,12),R(a2)
+ movel MEM_DISP(sp,16),R(a0)
+ movel MEM_DISP(sp,20),R(a1)
+ movel MEM_DISP(sp,24),R(d2)
+
+ eorw #1,R(d2)
+ lsrl #1,R(d2)
+ bcc L(L1)
+ subql #1,R(d2) /* clears cy as side effect */
+
+L(Loop:)
+ movel MEM_POSTINC(a0),R(d0)
+ movel MEM_POSTINC(a1),R(d1)
+ addxl R(d1),R(d0)
+ movel R(d0),MEM_POSTINC(a2)
+L(L1:) movel MEM_POSTINC(a0),R(d0)
+ movel MEM_POSTINC(a1),R(d1)
+ addxl R(d1),R(d0)
+ movel R(d0),MEM_POSTINC(a2)
+
+ dbf R(d2),L(Loop) /* loop until 16 lsb of %4 == -1 */
+ subxl R(d0),R(d0) /* d0 <= -cy; save cy as 0 or -1 in d0 */
+ subl #0x10000,R(d2)
+ bcs L(L2)
+ addl R(d0),R(d0) /* restore cy */
+ bra L(Loop)
+
+L(L2:)
+ negl R(d0)
/* Restore used registers from stack frame. */
- INSN2(move,l ,a2,MEM_POSTINC(sp))
- INSN2(move,l ,d2,MEM_POSTINC(sp))
+ movel MEM_POSTINC(sp),R(a2)
+ movel MEM_POSTINC(sp),R(d2)
rts
+EPILOG(__mpn_add_n)