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Annotation of OpenXM_contrib/gmp/mpn/sparc64/mul_1.s, Revision 1.1

1.1     ! maekawa     1: ! SPARC v9 __mpn_mul_1 -- Multiply a limb vector with a single limb and
        !             2: ! store the product in a second limb vector.
        !             3:
        !             4: ! Copyright (C) 1995, 1996 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      o0
        !            26: ! s1_ptr       o1
        !            27: ! size         o2
        !            28: ! s2_limb      o3
        !            29:
        !            30: .section       ".text"
        !            31:        .align 4
        !            32:        .global __mpn_mul_1
        !            33:        .type    __mpn_mul_1,#function
        !            34:        .proc   016
        !            35: __mpn_mul_1:
        !            36:        !#PROLOGUE#     0
        !            37:        save    %sp,-160,%sp
        !            38:        !#PROLOGUE#     1
        !            39:        sub     %g0,%i2,%o7
        !            40:        sllx    %o7,3,%g5
        !            41:        sub     %i1,%g5,%o3
        !            42:        sub     %i0,%g5,%o4
        !            43:        mov     0,%o0                   ! zero cy_limb
        !            44:
        !            45:        srl     %i3,0,%o1               ! extract low 32 bits of s2_limb
        !            46:        srlx    %i3,32,%i3              ! extract high 32 bits of s2_limb
        !            47:        mov     1,%o2
        !            48:        sllx    %o2,32,%o2              ! o2 = 0x100000000
        !            49:
        !            50:        !   hi   !
        !            51:              !  mid-1 !
        !            52:              !  mid-2 !
        !            53:                 !   lo   !
        !            54: .Loop:
        !            55:        sllx    %o7,3,%g1
        !            56:        ldx     [%o3+%g1],%g5
        !            57:        srl     %g5,0,%i0               ! zero hi bits
        !            58:        srlx    %g5,32,%g5
        !            59:        mulx    %o1,%i0,%i4             ! lo product
        !            60:        mulx    %i3,%i0,%i1             ! mid-1 product
        !            61:        mulx    %o1,%g5,%l2             ! mid-2 product
        !            62:        mulx    %i3,%g5,%i5             ! hi product
        !            63:        srlx    %i4,32,%i0              ! extract high 32 bits of lo product...
        !            64:        add     %i1,%i0,%i1             ! ...and add it to the mid-1 product
        !            65:        addcc   %i1,%l2,%i1             ! add mid products
        !            66:        mov     0,%l0                   ! we need the carry from that add...
        !            67:        movcs   %xcc,%o2,%l0            ! ...compute it and...
        !            68:        add     %i5,%l0,%i5             ! ...add to bit 32 of the hi product
        !            69:        sllx    %i1,32,%i0              ! align low bits of mid product
        !            70:        srl     %i4,0,%g5               ! zero high 32 bits of lo product
        !            71:        add     %i0,%g5,%i0             ! combine into low 64 bits of result
        !            72:        srlx    %i1,32,%i1              ! extract high bits of mid product...
        !            73:        add     %i5,%i1,%i1             ! ...and add them to the high result
        !            74:        addcc   %i0,%o0,%i0             ! add cy_limb to low 64 bits of result
        !            75:        mov     0,%g5
        !            76:        movcs   %xcc,1,%g5
        !            77:        add     %o7,1,%o7
        !            78:        stx     %i0,[%o4+%g1]
        !            79:        brnz    %o7,.Loop
        !            80:        add     %i1,%g5,%o0             ! compute new cy_limb
        !            81:
        !            82:        mov     %o0,%i0
        !            83:        ret
        !            84:        restore
        !            85: .LLfe1:
        !            86:        .size  __mpn_mul_1,.LLfe1-__mpn_mul_1