89565ae25f070411b0b32505b798195a9c98a1c2mturk; $Id$

2d0611ffc9f91c5fc2ddccb93f9a3d17791ae650takashi;; @file

89565ae25f070411b0b32505b798195a9c98a1c2mturk; innotek Portable Runtime - No-CRT truncf - AMD64 & X86.

d3e250aab242db84d14060985b5db675a731d548nd;

89565ae25f070411b0b32505b798195a9c98a1c2mturk

89565ae25f070411b0b32505b798195a9c98a1c2mturk;

89565ae25f070411b0b32505b798195a9c98a1c2mturk; Copyright (C) 2006-2007 innotek GmbH

89565ae25f070411b0b32505b798195a9c98a1c2mturk;

89565ae25f070411b0b32505b798195a9c98a1c2mturk; This file is part of VirtualBox Open Source Edition (OSE), as

89565ae25f070411b0b32505b798195a9c98a1c2mturk; available from http://www.virtualbox.org. This file is free software;

738ad457843927ece7fa5e91e4fb4a5710d13690lgentis; you can redistribute it and/or modify it under the terms of the GNU

89565ae25f070411b0b32505b798195a9c98a1c2mturk; General Public License (GPL) as published by the Free Software

89565ae25f070411b0b32505b798195a9c98a1c2mturk; Foundation, in version 2 as it comes in the "COPYING" file of the

; VirtualBox OSE distribution. VirtualBox OSE is distributed in the

; hope that it will be useful, but WITHOUT ANY WARRANTY of any kind.

;

; The contents of this file may alternatively be used under the terms

; of the Common Development and Distribution License Version 1.0

; (CDDL) only, as it comes in the "COPYING.CDDL" file of the

; VirtualBox OSE distribution, in which case the provisions of the

; CDDL are applicable instead of those of the GPL.

;

; You may elect to license modified versions of this file under the

; terms and conditions of either the GPL or the CDDL or both.

;

%include "iprt/asmdefs.mac"

BEGINCODE

%ifdef RT_ARCH_AMD64

%define _SP rsp

%define _BP rbp

%define _S 8

%else

%define _SP esp

%define _BP ebp

%define _S 4

%endif

;;

; Round to truncated integer value.

; @returns 32-bit: st(0) 64-bit: xmm0

; @param rf 32-bit: [ebp + 8] 64-bit: xmm0

BEGINPROC RT_NOCRT(truncf)

push _BP

mov _BP, _SP

sub _SP, 10h

%ifdef RT_ARCH_AMD64

movss [_SP], xmm0

fld dword [_SP]

%else

fld dword [_BP + _S*2]

%endif

; Make it truncate up by modifying the fpu control word.

fstcw [_BP - 10h]

mov eax, [_BP - 10h]

or eax, 00c00h

mov [_BP - 08h], eax

fldcw [_BP - 08h]

; Round ST(0) to integer.

frndint

; Restore the fpu control word.

fldcw [_BP - 10h]

%ifdef RT_ARCH_AMD64

fstp dword [_SP]

movss xmm0, [_SP]

%endif

leave

ret

ENDPROC RT_NOCRT(truncf)