+++ /dev/null
-/* mc68020 __gmpn_lshift -- Shift left a low-level natural-number integer.
-
-Copyright (C) 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)
- s_ptr (sp + 8)
- s_size (sp + 16)
- cnt (sp + 12)
-*/
-
-#include "asm-syntax.h"
-
-#define res_ptr a1
-#define s_ptr a0
-#define s_size d6
-#define cnt d4
-
- TEXT
- ALIGN
- GLOBL C_SYMBOL_NAME(__gmpn_lshift)
-
-C_SYMBOL_NAME(__gmpn_lshift:)
-PROLOG(__gmpn_lshift)
-
-/* Save used registers on the stack. */
- moveml R(d2)-R(d6)/R(a2),MEM_PREDEC(sp)
-
-/* Copy the arguments to registers. */
- movel MEM_DISP(sp,28),R(res_ptr)
- movel MEM_DISP(sp,32),R(s_ptr)
- movel MEM_DISP(sp,36),R(s_size)
- movel MEM_DISP(sp,40),R(cnt)
-
- moveql #1,R(d5)
- cmpl R(d5),R(cnt)
- bne L(Lnormal)
- cmpl R(s_ptr),R(res_ptr)
- bls L(Lspecial) /* jump if s_ptr >= res_ptr */
-#if (defined (__mc68020__) || defined (__NeXT__) || defined(mc68020))
- lea MEM_INDX1(s_ptr,s_size,l,4),R(a2)
-#else /* not mc68020 */
- movel R(s_size),R(d0)
- asll #2,R(d0)
- lea MEM_INDX(s_ptr,d0,l),R(a2)
-#endif
- cmpl R(res_ptr),R(a2)
- bls L(Lspecial) /* jump if res_ptr >= s_ptr + s_size */
-
-L(Lnormal:)
- moveql #32,R(d5)
- subl R(cnt),R(d5)
-
-#if (defined (__mc68020__) || defined (__NeXT__) || defined(mc68020))
- lea MEM_INDX1(s_ptr,s_size,l,4),R(s_ptr)
- lea MEM_INDX1(res_ptr,s_size,l,4),R(res_ptr)
-#else /* not mc68000 */
- movel R(s_size),R(d0)
- asll #2,R(d0)
- addl R(s_size),R(s_ptr)
- addl R(s_size),R(res_ptr)
-#endif
- movel MEM_PREDEC(s_ptr),R(d2)
- movel R(d2),R(d0)
- lsrl R(d5),R(d0) /* compute carry limb */
-
- lsll R(cnt),R(d2)
- movel R(d2),R(d1)
- subql #1,R(s_size)
- beq L(Lend)
- lsrl #1,R(s_size)
- bcs L(L1)
- subql #1,R(s_size)
-
-L(Loop:)
- movel MEM_PREDEC(s_ptr),R(d2)
- movel R(d2),R(d3)
- lsrl R(d5),R(d3)
- orl R(d3),R(d1)
- movel R(d1),MEM_PREDEC(res_ptr)
- lsll R(cnt),R(d2)
-L(L1:)
- movel MEM_PREDEC(s_ptr),R(d1)
- movel R(d1),R(d3)
- lsrl R(d5),R(d3)
- orl R(d3),R(d2)
- movel R(d2),MEM_PREDEC(res_ptr)
- lsll R(cnt),R(d1)
-
- dbf R(s_size),L(Loop)
- subl #0x10000,R(s_size)
- bcc L(Loop)
-
-L(Lend:)
- movel R(d1),MEM_PREDEC(res_ptr) /* store least significant limb */
-
-/* Restore used registers from stack frame. */
- moveml MEM_POSTINC(sp),R(d2)-R(d6)/R(a2)
- rts
-
-/* We loop from least significant end of the arrays, which is only
- permissable if the source and destination don't overlap, since the
- function is documented to work for overlapping source and destination. */
-
-L(Lspecial:)
- clrl R(d0) /* initialize carry */
- eorw #1,R(s_size)
- lsrl #1,R(s_size)
- bcc L(LL1)
- subql #1,R(s_size)
-
-L(LLoop:)
- movel MEM_POSTINC(s_ptr),R(d2)
- addxl R(d2),R(d2)
- movel R(d2),MEM_POSTINC(res_ptr)
-L(LL1:)
- movel MEM_POSTINC(s_ptr),R(d2)
- addxl R(d2),R(d2)
- movel R(d2),MEM_POSTINC(res_ptr)
-
- dbf R(s_size),L(LLoop)
- addxl R(d0),R(d0) /* save cy in lsb */
- subl #0x10000,R(s_size)
- bcs L(LLend)
- lsrl #1,R(d0) /* restore cy */
- bra L(LLoop)
-
-L(LLend:)
-/* Restore used registers from stack frame. */
- moveml MEM_POSTINC(sp),R(d2)-R(d6)/R(a2)
- rts
-EPILOG(__gmpn_lshift)
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