glibc/sysdeps/m68k/sub_n.S

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/* mc68020 __mpn_sub_n -- Subtract two limb vectors of the same length > 0 and
store difference in a third limb vector.
* sysdeps/m68k/add_n.S: Use ENTRY and END macros. * sysdeps/m68k/lshift.S: Likewise. * sysdeps/m68k/rshift.S: Likewise. * sysdeps/m68k/sub_n.S: Likewise. * sysdeps/m68k/m68020/addmul_1.S: Likewise. * sysdeps/m68k/m68020/mul_1.S: Likewise. * sysdeps/m68k/m68020/submul_1.S: Likewise. * sysdeps/unix/sysv/linux/m68k/sysdep.S: Use ENTRY macro. [_LIBC_REENTRANT]: Don't store into global errno. * sysdeps/m68k/sysdep.h: New file. * sysdeps/unix/sysv/linux/m68k/sysdep.h: Use it. Use the macros ENTRY, CALL_MCOUNT, JUMPTARGET and syscall_error from there. (DO_CALL): Change to expect syscall name as argument. (PSEUDO): Pass syscall_name to DO_CALL. (SYSCALL_ERROR_HANDLER) [_LIBC_REENTRANT]: Don't store into global errno. Fri Mar 6 10:40:30 1998 Andreas Schwab <schwab@issan.informatik.uni-dortmund.de> * sysdeps/m68k/add_n.S: Use ENTRY and END macros. * sysdeps/m68k/lshift.S: Likewise. * sysdeps/m68k/rshift.S: Likewise. * sysdeps/m68k/sub_n.S: Likewise. * sysdeps/m68k/m68020/addmul_1.S: Likewise. * sysdeps/m68k/m68020/mul_1.S: Likewise. * sysdeps/m68k/m68020/submul_1.S: Likewise. * sysdeps/unix/sysv/linux/m68k/sysdep.S: Use ENTRY macro. [_LIBC_REENTRANT]: Don't store into global errno. * sysdeps/m68k/sysdep.h: New file. * sysdeps/unix/sysv/linux/m68k/sysdep.h: Use it. Use the macros ENTRY, CALL_MCOUNT, JUMPTARGET and syscall_error from there. (DO_CALL): Change to expect syscall name as argument. (PSEUDO): Pass syscall_name to DO_CALL. (SYSCALL_ERROR_HANDLER) [_LIBC_REENTRANT]: Don't store into global errno.
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Copyright (C) 1992, 1994, 1996, 1998 Free Software Foundation, Inc.
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This file is part of the GNU MP Library.
The GNU MP Library is free software; you can redistribute it and/or modify
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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
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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
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or FITNESS FOR A PARTICULAR PURPOSE. See the GNU Lesser General Public
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License for more details.
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You should have received a copy of the GNU Lesser General Public License
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along with the GNU MP Library; see the file COPYING.LIB. If not, write to
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the Free Software Foundation, Inc., 59 Temple Place - Suite 330, Boston,
MA 02111-1307, USA. */
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/*
INPUT PARAMETERS
res_ptr (sp + 4)
s1_ptr (sp + 8)
s2_ptr (sp + 16)
size (sp + 12)
*/
#include "sysdep.h"
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#include "asm-syntax.h"
TEXT
* sysdeps/m68k/add_n.S: Use ENTRY and END macros. * sysdeps/m68k/lshift.S: Likewise. * sysdeps/m68k/rshift.S: Likewise. * sysdeps/m68k/sub_n.S: Likewise. * sysdeps/m68k/m68020/addmul_1.S: Likewise. * sysdeps/m68k/m68020/mul_1.S: Likewise. * sysdeps/m68k/m68020/submul_1.S: Likewise. * sysdeps/unix/sysv/linux/m68k/sysdep.S: Use ENTRY macro. [_LIBC_REENTRANT]: Don't store into global errno. * sysdeps/m68k/sysdep.h: New file. * sysdeps/unix/sysv/linux/m68k/sysdep.h: Use it. Use the macros ENTRY, CALL_MCOUNT, JUMPTARGET and syscall_error from there. (DO_CALL): Change to expect syscall name as argument. (PSEUDO): Pass syscall_name to DO_CALL. (SYSCALL_ERROR_HANDLER) [_LIBC_REENTRANT]: Don't store into global errno. Fri Mar 6 10:40:30 1998 Andreas Schwab <schwab@issan.informatik.uni-dortmund.de> * sysdeps/m68k/add_n.S: Use ENTRY and END macros. * sysdeps/m68k/lshift.S: Likewise. * sysdeps/m68k/rshift.S: Likewise. * sysdeps/m68k/sub_n.S: Likewise. * sysdeps/m68k/m68020/addmul_1.S: Likewise. * sysdeps/m68k/m68020/mul_1.S: Likewise. * sysdeps/m68k/m68020/submul_1.S: Likewise. * sysdeps/unix/sysv/linux/m68k/sysdep.S: Use ENTRY macro. [_LIBC_REENTRANT]: Don't store into global errno. * sysdeps/m68k/sysdep.h: New file. * sysdeps/unix/sysv/linux/m68k/sysdep.h: Use it. Use the macros ENTRY, CALL_MCOUNT, JUMPTARGET and syscall_error from there. (DO_CALL): Change to expect syscall name as argument. (PSEUDO): Pass syscall_name to DO_CALL. (SYSCALL_ERROR_HANDLER) [_LIBC_REENTRANT]: Don't store into global errno.
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ENTRY(__mpn_sub_n)
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/* Save used registers on the stack. */
movel R(d2),MEM_PREDEC(sp)
movel R(a2),MEM_PREDEC(sp)
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/* Copy the arguments to registers. Better use movem? */
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)
subxl R(d1),R(d0)
movel R(d0),MEM_POSTINC(a2)
L(L1:) movel MEM_POSTINC(a0),R(d0)
movel MEM_POSTINC(a1),R(d1)
subxl 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)
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/* Restore used registers from stack frame. */
movel MEM_POSTINC(sp),R(a2)
movel MEM_POSTINC(sp),R(d2)
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rts
* sysdeps/m68k/add_n.S: Use ENTRY and END macros. * sysdeps/m68k/lshift.S: Likewise. * sysdeps/m68k/rshift.S: Likewise. * sysdeps/m68k/sub_n.S: Likewise. * sysdeps/m68k/m68020/addmul_1.S: Likewise. * sysdeps/m68k/m68020/mul_1.S: Likewise. * sysdeps/m68k/m68020/submul_1.S: Likewise. * sysdeps/unix/sysv/linux/m68k/sysdep.S: Use ENTRY macro. [_LIBC_REENTRANT]: Don't store into global errno. * sysdeps/m68k/sysdep.h: New file. * sysdeps/unix/sysv/linux/m68k/sysdep.h: Use it. Use the macros ENTRY, CALL_MCOUNT, JUMPTARGET and syscall_error from there. (DO_CALL): Change to expect syscall name as argument. (PSEUDO): Pass syscall_name to DO_CALL. (SYSCALL_ERROR_HANDLER) [_LIBC_REENTRANT]: Don't store into global errno. Fri Mar 6 10:40:30 1998 Andreas Schwab <schwab@issan.informatik.uni-dortmund.de> * sysdeps/m68k/add_n.S: Use ENTRY and END macros. * sysdeps/m68k/lshift.S: Likewise. * sysdeps/m68k/rshift.S: Likewise. * sysdeps/m68k/sub_n.S: Likewise. * sysdeps/m68k/m68020/addmul_1.S: Likewise. * sysdeps/m68k/m68020/mul_1.S: Likewise. * sysdeps/m68k/m68020/submul_1.S: Likewise. * sysdeps/unix/sysv/linux/m68k/sysdep.S: Use ENTRY macro. [_LIBC_REENTRANT]: Don't store into global errno. * sysdeps/m68k/sysdep.h: New file. * sysdeps/unix/sysv/linux/m68k/sysdep.h: Use it. Use the macros ENTRY, CALL_MCOUNT, JUMPTARGET and syscall_error from there. (DO_CALL): Change to expect syscall name as argument. (PSEUDO): Pass syscall_name to DO_CALL. (SYSCALL_ERROR_HANDLER) [_LIBC_REENTRANT]: Don't store into global errno.
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END(__mpn_sub_n)