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Annotation of OpenXM_contrib/gmp/mpn/pa32/hppa2_0/add_n.asm, Revision 1.1

1.1     ! ohara       1: dnl  HP-PA 2.0 32-bit mpn_add_n -- Add two limb vectors of the same length > 0
        !             2: dnl  and store sum in a third limb vector.
        !             3:
        !             4: dnl  Copyright 1997, 1998, 2000, 2001, 2002 Free Software Foundation, Inc.
        !             5:
        !             6: dnl  This file is part of the GNU MP Library.
        !             7:
        !             8: dnl  The GNU MP Library is free software; you can redistribute it and/or modify
        !             9: dnl  it under the terms of the GNU Lesser General Public License as published
        !            10: dnl  by the Free Software Foundation; either version 2.1 of the License, or (at
        !            11: dnl  your option) any later version.
        !            12:
        !            13: dnl  The GNU MP Library is distributed in the hope that it will be useful, but
        !            14: dnl  WITHOUT ANY WARRANTY; without even the implied warranty of MERCHANTABILITY
        !            15: dnl  or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU Lesser General Public
        !            16: dnl  License for more details.
        !            17:
        !            18: dnl  You should have received a copy of the GNU Lesser General Public License
        !            19: dnl  along with the GNU MP Library; see the file COPYING.LIB.  If not, write to
        !            20: dnl  the Free Software Foundation, Inc., 59 Temple Place - Suite 330, Boston,
        !            21: dnl  MA 02111-1307, USA.
        !            22:
        !            23: include(`../config.m4')
        !            24:
        !            25: C INPUT PARAMETERS
        !            26: C res_ptr      gr26
        !            27: C s1_ptr       gr25
        !            28: C s2_ptr       gr24
        !            29: C size         gr23
        !            30:
        !            31: C This runs at 2 cycles/limb on PA8000.
        !            32:
        !            33: ASM_START()
        !            34: PROLOGUE(mpn_add_n)
        !            35:        sub             %r0,%r23,%r22
        !            36:        zdep            %r22,30,3,%r28          C r28 = 2 * (-n & 7)
        !            37:        zdep            %r22,29,3,%r22          C r22 = 4 * (-n & 7)
        !            38:        sub             %r25,%r22,%r25          C offset s1_ptr
        !            39:        sub             %r24,%r22,%r24          C offset s2_ptr
        !            40:        sub             %r26,%r22,%r26          C offset res_ptr
        !            41:        blr             %r28,%r0                C branch into loop
        !            42:        add             %r0,%r0,%r0             C reset carry
        !            43:
        !            44:        .label  L(loop)
        !            45:        ldw             0(%r25),%r20
        !            46:        ldw             0(%r24),%r31
        !            47:        addc            %r20,%r31,%r20
        !            48:        stw             %r20,0(%r26)
        !            49:
        !            50:        .label  L(7)
        !            51:        ldw             4(%r25),%r21
        !            52:        ldw             4(%r24),%r19
        !            53:        addc            %r21,%r19,%r21
        !            54:        stw             %r21,4(%r26)
        !            55:
        !            56:        .label  L(6)
        !            57:        ldw             8(%r25),%r20
        !            58:        ldw             8(%r24),%r31
        !            59:        addc            %r20,%r31,%r20
        !            60:        stw             %r20,8(%r26)
        !            61:
        !            62:        .label  L(5)
        !            63:        ldw             12(%r25),%r21
        !            64:        ldw             12(%r24),%r19
        !            65:        addc            %r21,%r19,%r21
        !            66:        stw             %r21,12(%r26)
        !            67:
        !            68:        .label  L(4)
        !            69:        ldw             16(%r25),%r20
        !            70:        ldw             16(%r24),%r31
        !            71:        addc            %r20,%r31,%r20
        !            72:        stw             %r20,16(%r26)
        !            73:
        !            74:        .label  L(3)
        !            75:        ldw             20(%r25),%r21
        !            76:        ldw             20(%r24),%r19
        !            77:        addc            %r21,%r19,%r21
        !            78:        stw             %r21,20(%r26)
        !            79:
        !            80:        .label  L(2)
        !            81:        ldw             24(%r25),%r20
        !            82:        ldw             24(%r24),%r31
        !            83:        addc            %r20,%r31,%r20
        !            84:        stw             %r20,24(%r26)
        !            85:
        !            86:        .label  L(1)
        !            87:        ldw             28(%r25),%r21
        !            88:        ldo             32(%r25),%r25
        !            89:        ldw             28(%r24),%r19
        !            90:        addc            %r21,%r19,%r21
        !            91:        stw             %r21,28(%r26)
        !            92:        ldo             32(%r24),%r24
        !            93:        addib,>         -8,%r23,L(loop)
        !            94:        ldo             32(%r26),%r26
        !            95:
        !            96:        bv              (%r2)
        !            97:        addc            %r0,%r0,%r28
        !            98: EPILOGUE()