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Annotation of OpenXM_contrib/gmp/tune/pentium.asm, Revision 1.1

1.1     ! maekawa     1: dnl  x86 pentium time stamp counter access routine.
        !             2:
        !             3: dnl  Copyright (C) 1999, 2000 Free Software Foundation, Inc.
        !             4: dnl
        !             5: dnl  This file is part of the GNU MP Library.
        !             6: dnl
        !             7: dnl  The GNU MP Library is free software; you can redistribute it and/or
        !             8: dnl  modify it under the terms of the GNU Lesser General Public License as
        !             9: dnl  published by the Free Software Foundation; either version 2.1 of the
        !            10: dnl  License, or (at your option) any later version.
        !            11: dnl
        !            12: dnl  The GNU MP Library is distributed in the hope that it will be useful,
        !            13: dnl  but WITHOUT ANY WARRANTY; without even the implied warranty of
        !            14: dnl  MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
        !            15: dnl  Lesser General Public License for more details.
        !            16: dnl
        !            17: dnl  You should have received a copy of the GNU Lesser General Public
        !            18: dnl  License along with the GNU MP Library; see the file COPYING.LIB.  If
        !            19: dnl  not, write to the Free Software Foundation, Inc., 59 Temple Place -
        !            20: dnl  Suite 330, Boston, MA 02111-1307, USA.
        !            21:
        !            22:
        !            23: include(`../config.m4')
        !            24:
        !            25:
        !            26: C void speed_cyclecounter (unsigned p[2]);
        !            27: C
        !            28: C Get the pentium rdtsc cycle counter, storing the least significant word in
        !            29: C p[0] and the most significant in p[1].
        !            30: C
        !            31: C cpuid is used to serialize execution.  On big measurements this won't be
        !            32: C significant but it may help make small single measurements more accurate.
        !            33:
        !            34:        .text
        !            35:        ALIGN(8)
        !            36:
        !            37: defframe(PARAM_P,4)
        !            38:
        !            39: PROLOGUE(speed_cyclecounter)
        !            40: deflit(`FRAME',0)
        !            41:        pushl   %ebx
        !            42: FRAME_pushl()
        !            43:        xorl    %eax, %eax
        !            44:        cpuid
        !            45:        rdtsc
        !            46:        movl    PARAM_P, %ebx
        !            47:        movl    %eax, (%ebx)
        !            48:        movl    %edx, 4(%ebx)
        !            49:        popl    %ebx
        !            50:        ret
        !            51: EPILOGUE()