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Annotation of OpenXM_contrib/gmp/mpn/hppa/hppa2_0/sub_n.s, Revision 1.1

1.1     ! maekawa     1: ; HP-PA 2.0 32-bit __gmpn_sub_n -- Subtract two limb vectors of the same
        !             2: ; length > 0 and store difference in a third limb vector.
        !             3:
        !             4: ; Copyright (C) 1997, 1998, 2000 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 Lesser General Public License as published by
        !            10: ; the Free Software Foundation; either version 2.1 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 Lesser General Public
        !            16: ; License for more details.
        !            17:
        !            18: ; You should have received a copy of the GNU Lesser 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      gr26
        !            26: ; s1_ptr       gr25
        !            27: ; s2_ptr       gr24
        !            28: ; size         gr23
        !            29:
        !            30: ; This runs at 2 cycles/limb on PA8000.
        !            31:
        !            32:        .code
        !            33:        .export __gmpn_sub_n
        !            34: __gmpn_sub_n
        !            35:        .proc
        !            36:        .callinfo frame=0,no_calls
        !            37:        .entry
        !            38:
        !            39:        sub             %r0,%r23,%r22
        !            40:        zdep            %r22,30,3,%r28          ; r28 = 2 * (-n & 7)
        !            41:        zdep            %r22,29,3,%r22          ; r22 = 4 * (-n & 7)
        !            42:        sub             %r25,%r22,%r25          ; offset s1_ptr
        !            43:        sub             %r24,%r22,%r24          ; offset s2_ptr
        !            44:        blr             %r28,%r0                ; branch into loop
        !            45:        sub             %r26,%r22,%r26          ; offset res_ptr and set carry
        !            46:
        !            47: L$loop ldw             0(%r25),%r20
        !            48:        ldw             0(%r24),%r31
        !            49:        subb            %r20,%r31,%r20
        !            50:        stw             %r20,0(%r26)
        !            51: L$7    ldw             4(%r25),%r21
        !            52:        ldw             4(%r24),%r19
        !            53:        subb            %r21,%r19,%r21
        !            54:        stw             %r21,4(%r26)
        !            55: L$6    ldw             8(%r25),%r20
        !            56:        ldw             8(%r24),%r31
        !            57:        subb            %r20,%r31,%r20
        !            58:        stw             %r20,8(%r26)
        !            59: L$5    ldw             12(%r25),%r21
        !            60:        ldw             12(%r24),%r19
        !            61:        subb            %r21,%r19,%r21
        !            62:        stw             %r21,12(%r26)
        !            63: L$4    ldw             16(%r25),%r20
        !            64:        ldw             16(%r24),%r31
        !            65:        subb            %r20,%r31,%r20
        !            66:        stw             %r20,16(%r26)
        !            67: L$3    ldw             20(%r25),%r21
        !            68:        ldw             20(%r24),%r19
        !            69:        subb            %r21,%r19,%r21
        !            70:        stw             %r21,20(%r26)
        !            71: L$2    ldw             24(%r25),%r20
        !            72:        ldw             24(%r24),%r31
        !            73:        subb            %r20,%r31,%r20
        !            74:        stw             %r20,24(%r26)
        !            75: L$1    ldw             28(%r25),%r21
        !            76:        ldo             32(%r25),%r25
        !            77:        ldw             28(%r24),%r19
        !            78:        subb            %r21,%r19,%r21
        !            79:        stw             %r21,28(%r26)
        !            80:        ldo             32(%r24),%r24
        !            81:        addib,>         -8,%r23,L$loop
        !            82:        ldo             32(%r26),%r26
        !            83:
        !            84:        addc            %r0,%r0,%r28
        !            85:        bv              (%r2)
        !            86:        .exit
        !            87:        subi            1,%r28,%r28
        !            88:        .procend