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|
; $Id: xmmsaving-asm.asm $
;; @file
; xmmsaving - assembly helpers.
;
;
; Copyright (C) 2009-2022 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>.
;
; The contents of this file may alternatively be used under the terms
; of the Common Development and Distribution License Version 1.0
; (CDDL), a copy of it is provided in the "COPYING.CDDL" file included
; in the VirtualBox 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.
;
; SPDX-License-Identifier: GPL-3.0-only OR CDDL-1.0
;
%include "iprt/asmdefs.mac"
%include "VBox/vmm/stam.mac"
BEGINCODE
;;
; DECLASM(int) XmmSavingTestLoadSet(const MYXMMREGSET *pSet, const MYXMMREGSET *pPrevSet, PRTUINT128U pBadVal);
;
; @returns 0 on success, 1-based register number on failure.
; @param pSet The new set.
; @param pPrevSet The previous set. Can be NULL.
; @param pBadVal Where to store the actual register value on failure.
;
BEGINPROC XmmSavingTestLoadSet
push xBP
mov xBP, xSP
sub xSP, 32 ; Space for storing an XMM register (in TEST_REG).
and xSP, ~31 ; Align it.
; Unify register/arguments.
%ifdef ASM_CALL64_GCC
mov r8, rdx ; pBadVal
mov xCX, rdi ; pSet
mov xDX, rsi ; pPrevSet
%endif
%ifdef RT_ARCH_X86
mov xCX, [ebp + 8] ; pSet
mov xDX, [ebp + 12] ; pPrevSet
%endif
test xDX, xDX
jz near .just_load
; Check that the old set is still correct.
%macro TEST_REG 1,
movdqa [xSP], xmm %+ %1
mov xAX, [xDX + %1 * 8]
cmp [xSP], xAX
jne %%bad
mov xAX, [xDX + %1 * 8 + xCB]
cmp [xSP + xCB], xAX
%ifdef RT_ARCH_X86
jne %%bad
mov xAX, [xDX + %1 * 8 + xCB*2]
cmp [xSP + xCB*2], xAX
jne %%bad
mov xAX, [xDX + %1 * 8 + xCB*3]
cmp [xSP + xCB*3], xAX
%endif
je %%next
%%bad:
mov eax, %1 + 1
jmp .return_copy_badval
%%next:
%endmacro
TEST_REG 0
TEST_REG 1
TEST_REG 2
TEST_REG 3
TEST_REG 4
TEST_REG 5
TEST_REG 6
TEST_REG 7
%ifdef RT_ARCH_AMD64
TEST_REG 8
TEST_REG 9
TEST_REG 10
TEST_REG 11
TEST_REG 12
TEST_REG 13
TEST_REG 14
TEST_REG 15
%endif
; Load the new state.
.just_load:
movdqu xmm0, [xCX + 0*8]
movdqu xmm1, [xCX + 1*8]
movdqu xmm2, [xCX + 2*8]
movdqu xmm3, [xCX + 3*8]
movdqu xmm4, [xCX + 4*8]
movdqu xmm5, [xCX + 5*8]
movdqu xmm6, [xCX + 6*8]
movdqu xmm7, [xCX + 7*8]
%ifdef RT_ARCH_AMD64
movdqu xmm8, [xCX + 8*8]
movdqu xmm9, [xCX + 9*8]
movdqu xmm10, [xCX + 10*8]
movdqu xmm11, [xCX + 11*8]
movdqu xmm12, [xCX + 12*8]
movdqu xmm13, [xCX + 13*8]
movdqu xmm14, [xCX + 14*8]
movdqu xmm15, [xCX + 15*8]
%endif
xor eax, eax
jmp .return
.return_copy_badval:
; don't touch eax here.
%ifdef RT_ARCH_X86
mov edx, [ebp + 16]
mov ecx, [esp]
mov [edx ], ecx
mov ecx, [esp + 4]
mov [edx + 4], ecx
mov ecx, [esp + 8]
mov [edx + 8], ecx
mov ecx, [esp + 12]
mov [edx + 12], ecx
%else
mov rdx, [rsp]
mov rcx, [rsp + 8]
mov [r8], rdx
mov [r8 + 8], rcx
%endif
jmp .return
.return:
leave
ret
ENDPROC XmmSavingTestLoadSet
|
