blob: cc53fa5945ffa0fcef19cf6ae02720b76c8bb74b (
plain)
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
|
; $Id: tstX86-FpuSaveRestoreA.asm $
;; @file
; tstX86-FpuSaveRestore - Experimenting with saving and restoring FPU, assembly bits.
;
;
; Copyright (C) 2013-2022 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>.
;
; 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
|
