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|
; $Id: tstX86-FpuSaveRestoreA.asm $
;; @file
; tstX86-FpuSaveRestore - Experimenting with saving and restoring FPU, assembly bits.
;
;
; Copyright (C) 2013-2023 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 "iprt/asmdefs.mac"
%include "iprt/x86.mac"
;*******************************************************************************
;* Global Variables *
;*******************************************************************************
BEGINCODE
g_r80_Zero: dt 0.0
g_r80_One: dt 1.0
BEGINCODE
;; Prepares a FPU exception.
BEGINPROC MyFpuPrepXcpt
fld tword [g_r80_One xWrtRIP]
fld tword [g_r80_Zero xWrtRIP]
fdiv st0
ret
ENDPROC MyFpuPrepXcpt
;; Same as above, just different address.
BEGINPROC MyFpuPrepXcpt2
fld tword [g_r80_One xWrtRIP]
fld tword [g_r80_Zero xWrtRIP]
fdiv st0
ret
ENDPROC MyFpuPrepXcpt2
BEGINPROC MyFpuSave
%ifdef ASM_CALL64_MSC
o64 fxsave [rcx]
%elifdef ASM_CALL64_GCC
o64 fxsave [rdi]
%elifdef RT_ARCH_X86
mov ecx, [esp + 4]
fxsave [ecx]
%else
%error "Unsupported architecture."
bad arch
%endif
ret
ENDPROC MyFpuSave
BEGINPROC MyFpuStoreEnv
%ifdef ASM_CALL64_MSC
fstenv [rcx]
%elifdef ASM_CALL64_GCC
fstenv [rdi]
%elifdef RT_ARCH_X86
mov ecx, [esp + 4]
fstenv [ecx]
%else
%error "Unsupported architecture."
bad arch
%endif
ret
ENDPROC MyFpuStoreEnv
BEGINPROC MyFpuRestore
%ifdef ASM_CALL64_MSC
o64 fxrstor [rcx]
%elifdef ASM_CALL64_GCC
o64 fxrstor [rdi]
%elifdef RT_ARCH_X86
mov ecx, [esp + 4]
fxrstor [ecx]
%else
%error "Unsupported architecture."
bad arch
%endif
ret
ENDPROC MyFpuRestore
BEGINPROC MyFpuLoadEnv
%ifdef ASM_CALL64_MSC
fldenv [rcx]
%elifdef ASM_CALL64_GCC
fldenv [rdi]
%elifdef RT_ARCH_X86
mov ecx, [esp + 4]
fldenv [ecx]
%else
%error "Unsupported architecture."
bad arch
%endif
ret
ENDPROC MyFpuLoadEnv
|
