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; rdtsca.asm -- RDTSC
;
; This file is part of the UCL data compression library.
;
; Copyright (C) 1996-2004 Markus Franz Xaver Johannes Oberhumer
; All Rights Reserved.
;
; The UCL library is free software; you can redistribute it and/or
; modify it under the terms of the GNU General Public License as
; published by the Free Software Foundation; either version 2 of
; the License, or (at your option) any later version.
;
; The UCL 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 General Public License for more details.
;
; You should have received a copy of the GNU General Public License
; along with the UCL library; see the file COPYING.
; If not, write to the Free Software Foundation, Inc.,
; 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA.
;
; Markus F.X.J. Oberhumer
; <markus@oberhumer.com>
; http://www.oberhumer.com/opensource/ucl/
;
%include "conf.ash"
.text
; /***********************************************************************
; // unsigned __far ucl_rdtsc_add_asm(ucl_uint32 __far ticks[2])
; ************************************************************************/
UCL_PUBLIC ucl_rdtsc_add_asm
CPU 386
push bp
mov bp, sp
push eax
push edx
push ds
push di
; ds:di = ticks
lds di, [bp+6]
clc ; serializing instruction
CPU 586
rdtsc
CPU 386
add [di], eax ; ticks[0] = low 32 bits
adc edx, byte 0
add [di+4], edx ; ticks[1] = high 32 bits
; store low 16 bits as return code - see "pop eax"
mov [bp-4], ax
pop di
pop ds
pop edx
pop eax
leave
retf ; return low bits
UCL_PUBLIC_END ucl_rdtsc_add_asm
; vi:ts=8:et
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