glibc/sysdeps/m68k/m680x0/m68020/addmul_1.S

89 lines
2.2 KiB
ArmAsm
Raw Normal View History

1995-02-17 20:13:09 +00:00
/* mc68020 __mpn_addmul_1 -- Multiply a limb vector with a limb and add
the result to a second limb vector.
Copyright (C) 1992-2017 Free Software Foundation, Inc.
1995-02-17 20:13:09 +00:00
This file is part of the GNU MP Library.
The GNU MP Library is free software; you can redistribute it and/or modify
2001-07-07 10:13:33 +00:00
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
1995-02-17 20:13:09 +00:00
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
2001-07-07 10:13:33 +00:00
or FITNESS FOR A PARTICULAR PURPOSE. See the GNU Lesser General Public
1995-02-17 20:13:09 +00:00
License for more details.
2001-07-07 10:13:33 +00:00
You should have received a copy of the GNU Lesser General Public License
2012-03-09 23:56:38 +00:00
along with the GNU MP Library. If not, see <http://www.gnu.org/licenses/>. */
1995-02-17 20:13:09 +00:00
/*
INPUT PARAMETERS
res_ptr (sp + 4)
s1_ptr (sp + 8)
1996-03-01 18:43:45 +00:00
s1_size (sp + 12)
1995-02-17 20:13:09 +00:00
s2_limb (sp + 16)
*/
1996-03-01 18:43:45 +00:00
#include "sysdep.h"
1995-02-17 20:13:09 +00:00
#include "asm-syntax.h"
TEXT
ENTRY(__mpn_addmul_1)
1995-02-17 20:13:09 +00:00
#define res_ptr a0
#define s1_ptr a1
1996-03-01 18:43:45 +00:00
#define s1_size d2
1995-02-17 20:13:09 +00:00
#define s2_limb d4
/* Save used registers on the stack. */
1996-03-01 18:43:45 +00:00
moveml R(d2)-R(d5),MEM_PREDEC(sp)
2012-01-05 13:52:48 +00:00
cfi_adjust_cfa_offset (4*4)
cfi_rel_offset (R(d2), 0)
cfi_rel_offset (R(d3), 4)
cfi_rel_offset (R(d4), 8)
cfi_rel_offset (R(d5), 12)
1995-02-17 20:13:09 +00:00
/* Copy the arguments to registers. Better use movem? */
1996-03-01 18:43:45 +00:00
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)
1995-02-17 20:13:09 +00:00
/* Restore used registers from stack frame. */
1996-03-01 18:43:45 +00:00
moveml MEM_POSTINC(sp),R(d2)-R(d5)
2012-01-05 13:52:48 +00:00
cfi_adjust_cfa_offset (-4*4)
cfi_restore (R(d2))
cfi_restore (R(d3))
cfi_restore (R(d4))
cfi_restore (R(d5))
1995-02-17 20:13:09 +00:00
rts
END(__mpn_addmul_1)