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Annotation of OpenXM_contrib/gmp/tune/pentium.asm, Revision 1.1.1.2

1.1       maekawa     1: dnl  x86 pentium time stamp counter access routine.
                      2:
1.1.1.2 ! ohara       3: dnl  Copyright 1999, 2000 Free Software Foundation, Inc.
1.1       maekawa     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()