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Annotation of OpenXM_contrib/gmp/mpn/m68k/mc68020/aorsmul_1.asm, Revision 1.1

1.1     ! ohara       1: dnl  mc68020 mpn_addmul_1, mpn_submul_1 -- add or subtract mpn multiple.
        !             2: dnl
        !             3: dnl        cycles/limb
        !             4: dnl  68040:   20.5
        !             5:
        !             6: dnl  Copyright 1992, 1994, 1996, 1999, 2000, 2001 Free Software Foundation,
        !             7: dnl  Inc.
        !             8: dnl
        !             9: dnl  This file is part of the GNU MP Library.
        !            10: dnl
        !            11: dnl  The GNU MP Library is free software; you can redistribute it and/or
        !            12: dnl  modify it under the terms of the GNU Lesser General Public License as
        !            13: dnl  published by the Free Software Foundation; either version 2.1 of the
        !            14: dnl  License, or (at your option) any later version.
        !            15: dnl
        !            16: dnl  The GNU MP Library is distributed in the hope that it will be useful,
        !            17: dnl  but WITHOUT ANY WARRANTY; without even the implied warranty of
        !            18: dnl  MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
        !            19: dnl  Lesser General Public License for more details.
        !            20: dnl
        !            21: dnl  You should have received a copy of the GNU Lesser General Public
        !            22: dnl  License along with the GNU MP Library; see the file COPYING.LIB.  If
        !            23: dnl  not, write to the Free Software Foundation, Inc., 59 Temple Place -
        !            24: dnl  Suite 330, Boston, MA 02111-1307, USA.
        !            25:
        !            26: include(`../config.m4')
        !            27:
        !            28:
        !            29: ifdef(`OPERATION_addmul_1',`
        !            30:   define(M4_inst,       addl)
        !            31:   define(M4_function_1, mpn_addmul_1)
        !            32: ',`ifdef(`OPERATION_submul_1',`
        !            33:   define(M4_inst,       subl)
        !            34:   define(M4_function_1, mpn_submul_1)
        !            35: ',
        !            36: `m4_error(`Need OPERATION_addmul_1 or OPERATION_submul_1
        !            37: ')')')
        !            38:
        !            39:
        !            40: C INPUT PARAMETERS
        !            41: C res_ptr      (sp + 4)
        !            42: C s1_ptr       (sp + 8)
        !            43: C s1_size      (sp + 12)
        !            44: C s2_limb      (sp + 16)
        !            45:
        !            46: define(res_ptr, `a0')
        !            47: define(s1_ptr,  `a1')
        !            48: define(s1_size, `d2')
        !            49: define(s2_limb, `d4')
        !            50:
        !            51:
        !            52: PROLOGUE(M4_function_1)
        !            53:
        !            54: C Save used registers on the stack.
        !            55:        moveml  d2-d5, M(-,sp)
        !            56:
        !            57: C Copy the arguments to registers.  Better use movem?
        !            58:        movel   M(sp,20), res_ptr
        !            59:        movel   M(sp,24), s1_ptr
        !            60:        movel   M(sp,28), s1_size
        !            61:        movel   M(sp,32), s2_limb
        !            62:
        !            63:        eorw    #1, s1_size
        !            64:        clrl    d1
        !            65:        clrl    d5
        !            66:        lsrl    #1, s1_size
        !            67:        bcc     L(L1)
        !            68:        subql   #1, s1_size
        !            69:        subl    d0, d0          C (d0,cy) <= (0,0)
        !            70:
        !            71: L(Loop):
        !            72:        movel   M(s1_ptr,+), d3
        !            73:        mulul   s2_limb, d1:d3
        !            74:        addxl   d0, d3
        !            75:        addxl   d5, d1
        !            76:        M4_inst d3, M(res_ptr,+)
        !            77: L(L1): movel   M(s1_ptr,+), d3
        !            78:        mulul   s2_limb, d0:d3
        !            79:        addxl   d1, d3
        !            80:        addxl   d5, d0
        !            81:        M4_inst d3, M(res_ptr,+)
        !            82:
        !            83:        dbf     s1_size, L(Loop)
        !            84:        addxl   d5, d0
        !            85:        subl    #0x10000, s1_size
        !            86:        bcc     L(Loop)
        !            87:
        !            88: C Restore used registers from stack frame.
        !            89:        moveml  M(sp,+), d2-d5
        !            90:
        !            91:        rts
        !            92:
        !            93: EPILOGUE(M4_function_1)