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Annotation of OpenXM_contrib/gmp/mpn/alpha/sub_n.asm, Revision 1.1

1.1     ! maekawa     1: dnl  Alpha mpn_sub_n -- Subtract two limb vectors of the same length > 0 and
        !             2: dnl  store difference in a third limb vector.
        !             3:
        !             4: dnl  Copyright (C) 1995, 2000 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 by
        !            10: dnl  the Free Software Foundation; either version 2.1 of the License, or (at your
        !            11: dnl  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: dnl  INPUT PARAMETERS
        !            26: dnl  res_ptr   r16
        !            27: dnl  s1_ptr    r17
        !            28: dnl  s2_ptr    r18
        !            29: dnl  size      r19
        !            30:
        !            31: ASM_START()
        !            32: PROLOGUE(mpn_sub_n)
        !            33:        ldq     r3,0(r17)
        !            34:        ldq     r4,0(r18)
        !            35:
        !            36:        subq    r19,1,r19
        !            37:        and     r19,4-1,r2      C number of limbs in first loop
        !            38:        bis     r31,r31,r0
        !            39:        beq     r2,$L0          C if multiple of 4 limbs, skip first loop
        !            40:
        !            41:        subq    r19,r2,r19
        !            42:
        !            43: $Loop0:        subq    r2,1,r2
        !            44:        ldq     r5,8(r17)
        !            45:        addq    r4,r0,r4
        !            46:        ldq     r6,8(r18)
        !            47:        cmpult  r4,r0,r1
        !            48:        subq    r3,r4,r4
        !            49:        cmpult  r3,r4,r0
        !            50:        stq     r4,0(r16)
        !            51:        bis     r0,r1,r0
        !            52:
        !            53:        addq    r17,8,r17
        !            54:        addq    r18,8,r18
        !            55:        bis     r5,r5,r3
        !            56:        bis     r6,r6,r4
        !            57:        addq    r16,8,r16
        !            58:        bne     r2,$Loop0
        !            59:
        !            60: $L0:   beq     r19,$Lend
        !            61:
        !            62:        ALIGN(8)
        !            63: $Loop: subq    r19,4,r19
        !            64:
        !            65:        ldq     r5,8(r17)
        !            66:        addq    r4,r0,r4
        !            67:        ldq     r6,8(r18)
        !            68:        cmpult  r4,r0,r1
        !            69:        subq    r3,r4,r4
        !            70:        cmpult  r3,r4,r0
        !            71:        stq     r4,0(r16)
        !            72:        bis     r0,r1,r0
        !            73:
        !            74:        ldq     r3,16(r17)
        !            75:        addq    r6,r0,r6
        !            76:        ldq     r4,16(r18)
        !            77:        cmpult  r6,r0,r1
        !            78:        subq    r5,r6,r6
        !            79:        cmpult  r5,r6,r0
        !            80:        stq     r6,8(r16)
        !            81:        bis     r0,r1,r0
        !            82:
        !            83:        ldq     r5,24(r17)
        !            84:        addq    r4,r0,r4
        !            85:        ldq     r6,24(r18)
        !            86:        cmpult  r4,r0,r1
        !            87:        subq    r3,r4,r4
        !            88:        cmpult  r3,r4,r0
        !            89:        stq     r4,16(r16)
        !            90:        bis     r0,r1,r0
        !            91:
        !            92:        ldq     r3,32(r17)
        !            93:        addq    r6,r0,r6
        !            94:        ldq     r4,32(r18)
        !            95:        cmpult  r6,r0,r1
        !            96:        subq    r5,r6,r6
        !            97:        cmpult  r5,r6,r0
        !            98:        stq     r6,24(r16)
        !            99:        bis     r0,r1,r0
        !           100:
        !           101:        addq    r17,32,r17
        !           102:        addq    r18,32,r18
        !           103:        addq    r16,32,r16
        !           104:        bne     r19,$Loop
        !           105:
        !           106: $Lend: addq    r4,r0,r4
        !           107:        cmpult  r4,r0,r1
        !           108:        subq    r3,r4,r4
        !           109:        cmpult  r3,r4,r0
        !           110:        stq     r4,0(r16)
        !           111:        bis     r0,r1,r0
        !           112:        ret     r31,(r26),1
        !           113: EPILOGUE(mpn_sub_n)
        !           114: ASM_END()