source: vbox/trunk/src/VBox/Runtime/common/math/lrintl.asm@ 96215

; $Id: lrintl.asm 96215 2022-08-15 10:48:50Z vboxsync $
;; @file
; IPRT - No-CRT lrintl - AMD64 & X86.
;

;
; Copyright (C) 2006-2022 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.
;


%define RT_ASM_WITH_SEH64
%include "iprt/asmdefs.mac"


BEGINCODE

;;
; Round lrd to the nearest integer value, rounding according to the current rounding direction.
; @returns 32-bit: eax  64-bit: rax (non-windows) or eax (windows)
; @param    lrd     [rbp + xCB*2]
RT_NOCRT_BEGINPROC lrintl
        push    xBP
        SEH64_PUSH_xBP
        mov     xBP, xSP
        SEH64_SET_FRAME_xBP 0
        sub     xSP, 10h
        SEH64_ALLOCATE_STACK 10h
        SEH64_END_PROLOGUE

        fld     tword [xBP + xCB*2]
%ifdef RT_ARCH_AMD64
 %ifdef RT_OS_WINDOWS
        fistp   dword [xSP]
        fwait
        mov     eax, [xSP]
 %else
        fistp   qword [xSP]
        fwait
        mov     rax, [xSP]
 %endif
%else
        fistp   dword [xSP]
        fwait
        mov     eax, [xSP]
%endif

        leave
        ret
ENDPROC   RT_NOCRT(lrintl)