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f133d007f9
Old version was from 2012-05-06, 6.1.2 is from 2016-12-16 A lot of support for newer processors and speedups since then See gmp/NEWS for details
61 lines
1.7 KiB
NASM
61 lines
1.7 KiB
NASM
dnl x86 pentium time stamp counter access routine.
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dnl Copyright 1999, 2000, 2005 Free Software Foundation, Inc.
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dnl This file is part of the GNU MP Library.
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dnl
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dnl The GNU MP Library is free software; you can redistribute it and/or modify
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dnl it under the terms of either:
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dnl
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dnl * the GNU Lesser General Public License as published by the Free
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dnl Software Foundation; either version 3 of the License, or (at your
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dnl option) any later version.
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dnl
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dnl or
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dnl
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dnl * the GNU General Public License as published by the Free Software
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dnl Foundation; either version 2 of the License, or (at your option) any
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dnl later version.
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dnl
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dnl or both in parallel, as here.
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dnl
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dnl The GNU MP Library is distributed in the hope that it will be useful, but
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dnl WITHOUT ANY WARRANTY; without even the implied warranty of MERCHANTABILITY
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dnl or FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
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dnl for more details.
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dnl
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dnl You should have received copies of the GNU General Public License and the
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dnl GNU Lesser General Public License along with the GNU MP Library. If not,
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dnl see https://www.gnu.org/licenses/.
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include(`../config.m4')
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C void speed_cyclecounter (unsigned p[2]);
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C
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C Get the pentium rdtsc cycle counter, storing the least significant word in
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C p[0] and the most significant in p[1].
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C
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C cpuid is used to serialize execution. On big measurements this won't be
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C significant but it may help make small single measurements more accurate.
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.text
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ALIGN(8)
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defframe(PARAM_P,4)
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PROLOGUE(speed_cyclecounter)
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deflit(`FRAME',0)
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pushl %ebx
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FRAME_pushl()
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xorl %eax, %eax
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cpuid
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rdtsc
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movl PARAM_P, %ebx
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movl %eax, (%ebx)
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movl %edx, 4(%ebx)
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popl %ebx
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ret
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EPILOGUE()
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