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Annotation of OpenXM_contrib/gmp/mpn/z8000/mul_1.s, Revision 1.1

1.1     ! maekawa     1: ! Z8000 __mpn_mul_1 -- Multiply a limb vector with a limb and store
        !             2: ! the result in a second limb vector.
        !             3:
        !             4: ! Copyright (C) 1993, 1994, 1995 Free Software Foundation, Inc.
        !             5:
        !             6: ! This file is part of the GNU MP Library.
        !             7:
        !             8: ! The GNU MP Library is free software; you can redistribute it and/or modify
        !             9: ! it under the terms of the GNU Library General Public License as published by
        !            10: ! the Free Software Foundation; either version 2 of the License, or (at your
        !            11: ! option) any later version.
        !            12:
        !            13: ! The GNU MP Library is distributed in the hope that it will be useful, but
        !            14: ! WITHOUT ANY WARRANTY; without even the implied warranty of MERCHANTABILITY
        !            15: ! or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU Library General Public
        !            16: ! License for more details.
        !            17:
        !            18: ! You should have received a copy of the GNU Library General Public License
        !            19: ! along with the GNU MP Library; see the file COPYING.LIB.  If not, write to
        !            20: ! the Free Software Foundation, Inc., 59 Temple Place - Suite 330, Boston,
        !            21: ! MA 02111-1307, USA.
        !            22:
        !            23:
        !            24: ! INPUT PARAMETERS
        !            25: ! res_ptr      r7
        !            26: ! s1_ptr       r6
        !            27: ! size         r5
        !            28: ! s2_limb      r4
        !            29:
        !            30:        unseg
        !            31:        .text
        !            32:        even
        !            33:        global ___mpn_mul_1
        !            34: ___mpn_mul_1:
        !            35:        sub     r2,r2           ! zero carry limb
        !            36:        and     r4,r4
        !            37:        jr      mi,Lneg
        !            38:
        !            39: Lpos:  pop     r1,@r6
        !            40:        ld      r9,r1
        !            41:        mult    rr8,r4
        !            42:        and     r1,r1           ! shift msb of loaded limb into cy
        !            43:        jr      mi,Lp           ! branch if loaded limb's msb is set
        !            44:        add     r8,r4           ! hi_limb += sign_comp2
        !            45: Lp:    add     r9,r2           ! lo_limb += cy_limb
        !            46:        xor     r2,r2
        !            47:        adc     r2,r8
        !            48:        ld      @r7,r9
        !            49:        inc     r7,#2
        !            50:        dec     r5
        !            51:        jr      ne,Lpos
        !            52:        ret t
        !            53:
        !            54: Lneg:  pop     r1,@r6
        !            55:        ld      r9,r1
        !            56:        mult    rr8,r4
        !            57:        add     r8,r1           ! hi_limb += sign_comp1
        !            58:        and     r1,r1
        !            59:        jr      mi,Ln
        !            60:        add     r8,r4           ! hi_limb += sign_comp2
        !            61: Ln:    add     r9,r2           ! lo_limb += cy_limb
        !            62:        xor     r2,r2
        !            63:        adc     r2,r8
        !            64:        ld      @r7,r9
        !            65:        inc     r7,#2
        !            66:        dec     r5
        !            67:        jr      ne,Lneg
        !            68:        ret t