ce188d4d |
1 | ; vim:filetype=nasm ts=8 |
2 | |
3 | ; libFLAC - Free Lossless Audio Codec library |
4 | ; Copyright (C) 2001-2009 Josh Coalson |
5 | ; Copyright (C) 2011-2016 Xiph.Org Foundation |
6 | ; |
7 | ; Redistribution and use in source and binary forms, with or without |
8 | ; modification, are permitted provided that the following conditions |
9 | ; are met: |
10 | ; |
11 | ; - Redistributions of source code must retain the above copyright |
12 | ; notice, this list of conditions and the following disclaimer. |
13 | ; |
14 | ; - Redistributions in binary form must reproduce the above copyright |
15 | ; notice, this list of conditions and the following disclaimer in the |
16 | ; documentation and/or other materials provided with the distribution. |
17 | ; |
18 | ; - Neither the name of the Xiph.org Foundation nor the names of its |
19 | ; contributors may be used to endorse or promote products derived from |
20 | ; this software without specific prior written permission. |
21 | ; |
22 | ; THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS |
23 | ; ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT |
24 | ; LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR |
25 | ; A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE FOUNDATION OR |
26 | ; CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, |
27 | ; EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, |
28 | ; PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR |
29 | ; PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF |
30 | ; LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING |
31 | ; NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS |
32 | ; SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. |
33 | |
34 | %include "nasm.h" |
35 | |
36 | data_section |
37 | |
38 | cglobal FLAC__cpu_have_cpuid_asm_ia32 |
39 | cglobal FLAC__cpu_info_asm_ia32 |
40 | |
41 | code_section |
42 | |
43 | ; ********************************************************************** |
44 | ; |
45 | ; FLAC__uint32 FLAC__cpu_have_cpuid_asm_ia32() |
46 | ; |
47 | |
48 | cident FLAC__cpu_have_cpuid_asm_ia32 |
49 | pushfd |
50 | pop eax |
51 | mov edx, eax |
52 | xor eax, 0x00200000 |
53 | push eax |
54 | popfd |
55 | pushfd |
56 | pop eax |
57 | xor eax, edx |
58 | and eax, 0x00200000 |
59 | shr eax, 0x15 |
60 | push edx |
61 | popfd |
62 | ret |
63 | |
64 | ; ********************************************************************** |
65 | ; |
66 | ; void FLAC__cpu_info_asm_ia32(FLAC__uint32 *flags_edx, FLAC__uint32 *flags_ecx) |
67 | ; |
68 | |
69 | cident FLAC__cpu_info_asm_ia32 |
70 | ;[esp + 8] == flags_edx |
71 | ;[esp + 12] == flags_ecx |
72 | |
73 | push ebx |
74 | call FLAC__cpu_have_cpuid_asm_ia32 |
75 | test eax, eax |
76 | jz .no_cpuid |
77 | mov eax, 0 |
78 | cpuid |
79 | cmp eax, 1 |
80 | jb .no_cpuid |
81 | xor ecx, ecx |
82 | mov eax, 1 |
83 | cpuid |
84 | mov ebx, [esp + 8] |
85 | mov [ebx], edx |
86 | mov ebx, [esp + 12] |
87 | mov [ebx], ecx |
88 | jmp .end |
89 | .no_cpuid: |
90 | xor eax, eax |
91 | mov ebx, [esp + 8] |
92 | mov [ebx], eax |
93 | mov ebx, [esp + 12] |
94 | mov [ebx], eax |
95 | .end: |
96 | pop ebx |
97 | ret |
98 | |
99 | ; end |