source: vbox/trunk/src/VBox/VMM/VMMAll/VMMAllA.asm

; $Id: VMMAllA.asm 98103 2023-01-17 14:15:46Z vboxsync $
;; @file
; VMM - All Contexts Assembly Routines.
;

;
; Copyright (C) 2009-2023 Oracle and/or its affiliates.
;
; This file is part of VirtualBox base platform packages, as
; available from https://www.virtualbox.org.
;
; This program 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, in version 3 of the
; License.
;
; This program 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 this program; if not, see <https://www.gnu.org/licenses>.
;
; SPDX-License-Identifier: GPL-3.0-only
;

;*******************************************************************************
;* Header Files                                                                *
;*******************************************************************************
%include "VBox/asmdefs.mac"


;*******************************************************************************
;* Defined Constants And Macros                                                *
;*******************************************************************************
%ifdef IN_RING3
 %ifdef RT_ARCH_AMD64
  %define VMM_TRASH_XMM_REGS
 %endif
%endif
%ifdef IN_RING0
 %ifdef RT_ARCH_AMD64
  %ifdef RT_OS_WINDOWS
   %define VMM_TRASH_XMM_REGS
  %endif
 %endif
%endif
%ifndef VMM_TRASH_XMM_REGS
 %ifdef VBOX_WITH_KERNEL_USING_XMM
  %define VMM_TRASH_XMM_REGS
 %endif
%endif

BEGINCODE


;;
; Trashes the volatile XMM registers in the current ABI.
;
BEGINPROC VMMTrashVolatileXMMRegs
%ifdef VMM_TRASH_XMM_REGS
        push    xBP
        mov     xBP, xSP

        ; take whatever is on the stack.
        and     xSP, ~15
        sub     xSP, 80h

        movdqa  xmm0, [xSP + 0]
        movdqa  xmm1, [xSP + 010h]
        movdqa  xmm2, [xSP + 020h]
        movdqa  xmm3, [xSP + 030h]
        movdqa  xmm4, [xSP + 040h]
        movdqa  xmm5, [xSP + 050h]
 %ifdef ASM_CALL64_GCC
        movdqa  xmm6, [xSP + 060h]
        movdqa  xmm7, [xSP + 070h]
        movdqa  xmm8, [xSP + 000h]
        movdqa  xmm9, [xSP + 010h]
        movdqa  xmm10,[xSP + 020h]
        movdqa  xmm11,[xSP + 030h]
        movdqa  xmm12,[xSP + 040h]
        movdqa  xmm13,[xSP + 050h]
        movdqa  xmm14,[xSP + 060h]
        movdqa  xmm15,[xSP + 070h]
 %endif
        leave
%endif ; VMM_TRASH_XMM_REGS
        xor     eax, eax                ; for good measure.
        ret
ENDPROC   VMMTrashVolatileXMMRegs