49 lines
1.5 KiB
ActionScript
49 lines
1.5 KiB
ActionScript
|
; x86 pentium time stamp counter access routine.
|
||
|
|
;
|
||
|
|
; Copyright 1999, 2000, 2003, 2004, 2005 Free Software Foundation, Inc.
|
||
|
|
;
|
||
|
|
; This file is part of the GNU MP Library.
|
||
|
|
;
|
||
|
|
; The GNU MP Library is free software; you can redistribute it and/or
|
||
|
|
; modify it under the terms of the GNU Lesser General Public License as
|
||
|
|
; published by the Free Software Foundation; either version 2.1 of the
|
||
|
|
; License, or (at your option) any later version.
|
||
|
|
;
|
||
|
|
; The GNU MP Library is distributed in the hope that it will be useful,
|
||
|
|
; but WITHOUT ANY WARRANTY; without even the implied warranty of
|
||
|
|
; MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
|
||
|
|
; Lesser General Public License for more details.
|
||
|
|
;
|
||
|
|
; You should have received a copy of the GNU Lesser General Public
|
||
|
|
; License along with the GNU MP Library; see the file COPYING.LIB. If
|
||
|
|
; not, write to the Free Software Foundation, Inc., 51 Franklin Street,
|
||
|
|
; Fifth Floor, Boston, MA 02110-1301, USA.
|
||
|
|
|
||
|
|
|
||
|
|
; void speed_cyclecounter (unsigned p[2]);
|
||
|
|
;
|
||
|
|
; Get the pentium rdtsc cycle counter, storing the least significant word in
|
||
|
|
; p[0] and the most significant in p[1].
|
||
|
|
;
|
||
|
|
; cpuid is used to serialize execution. On big measurements this won't be
|
||
|
|
; significant but it may help make small single measurements more accurate.
|
||
|
|
|
||
|
|
bits 64
|
||
|
|
section .text
|
||
|
|
|
||
|
|
global speed_cyclecounter:function
|
||
|
|
|
||
|
|
speed_cyclecounter:
|
||
|
|
; rdi p
|
||
|
|
|
||
|
|
mov r10, rbx
|
||
|
|
xor eax, eax
|
||
|
|
cpuid
|
||
|
|
rdtsc
|
||
|
|
mov [rdi], eax
|
||
|
|
mov [rdi+4], edx
|
||
|
|
mov rbx, r10
|
||
|
|
ret
|
||
|
|
|
||
|
|
end
|