source: vbox/trunk/src/VBox/Runtime/common/math/lrint.asm@ 40265

; $Id: lrint.asm 28800 2010-04-27 08:22:32Z vboxsync $
;; @file
; IPRT - No-CRT lrint - AMD64 & X86.
;

;
; Copyright (C) 2006-2007 Oracle Corporation
;
; This file is part of VirtualBox Open Source Edition (OSE), as
; available from http://www.virtualbox.org. This file is free software;
; you can redistribute it and/or modify it under the terms of the GNU
; General Public License (GPL) as published by the Free Software
; 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

;;
; Round rd to the nearest integer value, rounding according to the current rounding direction.
; @returns 32-bit: eax  64-bit: rax
; @param    rd     32-bit: [esp + 4h]  64-bit: xmm0
BEGINPROC RT_NOCRT(lrint)
%ifdef RT_ARCH_AMD64
    cvtsd2si rax, xmm0
%else
    push    ebp
    mov     ebp, esp
    sub     esp, 8h

    fld     qword [ebp + 8h]
    fistp   dword [esp]
    fwait
    mov     eax, [esp]

    leave
%endif
    ret
ENDPROC   RT_NOCRT(lrint)