Return to sub_n.asm CVS log

Up to [local] / OpenXM_contrib / gmp / mpn / pa32

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

1.1     ! ohara       1: dnl  HP-PA 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 1992, 1994, 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 One might want to unroll this as for other processors, but it turns out that
        !            32: C the data cache contention after a store makes such unrolling useless.  We
        !            33: C can't come under 5 cycles/limb anyway.
        !            34:
        !            35: ASM_START()
        !            36: PROLOGUE(mpn_sub_n)
        !            37:        ldws,ma         4(0,%r25),%r20
        !            38:        ldws,ma         4(0,%r24),%r19
        !            39:
        !            40:        addib,=         -1,%r23,L(end)  C check for (SIZE == 1)
        !            41:         sub            %r20,%r19,%r28  C subtract first limbs ignoring cy
        !            42:
        !            43:        .label  L(loop)
        !            44:        ldws,ma         4(0,%r25),%r20
        !            45:        ldws,ma         4(0,%r24),%r19
        !            46:        stws,ma         %r28,4(0,%r26)
        !            47:        addib,<>        -1,%r23,L(loop)
        !            48:         subb           %r20,%r19,%r28
        !            49:
        !            50:        .label  L(end)
        !            51:        stws            %r28,0(0,%r26)
        !            52:        addc            %r0,%r0,%r28
        !            53:        bv              0(%r2)
        !            54:         subi           1,%r28,%r28
        !            55: EPILOGUE()