source: trunk/src/kernel32/cpuhlp.asm@ 2016

Last change on this file since 2016 was 1815, checked in by sandervl, 26 years ago

Added GetSystemInfo + IsProcessorFeaturePresent
File size: 1.5 KB
Line 
1; $Id: cpuhlp.asm,v 1.1 1999-11-23 19:31:35 sandervl Exp $
2
3;/*
4; * Project Odin Software License can be found in LICENSE.TXT
5; * CPU detection functions
6; *
7; * Copyright 1999 Sander van Leeuwen
8; *
9; */
10.586
11 NAME except
12
13CODE32 SEGMENT DWORD PUBLIC USE32 'CODE'
14
15 public SupportsCPUID
16
17SupportsCPUID proc near
18 pushfd
19 push ecx
20
21 pushfd
22 pop eax
23 mov ecx, eax
24 xor eax, 200000h ;flip bit 21
25 push eax
26 popfd
27 pushfd
28 pop eax
29 cmp eax, ecx ;bit 21 changed -> has cpuid support
30 jnz @supportscpuid
31 xor eax, eax
32 jmp short @end
33
34@supportscpuid:
35 mov eax, 1
36@end:
37 pop ecx
38 popfd
39 ret
40SupportsCPUID endp
41
42 public GetCPUVendorString
43
44GetCPUVendorString proc near
45 push ebp
46 mov ebp, esp
47 push ebx
48 push ecx
49 push edx
50 push esi
51
52 mov esi, [ebp+8] ;ptr to string
53 mov eax, 0
54 cpuid
55
56 mov [esi], ebx
57 mov [esi+4], edx
58 mov [esi+8], ecx
59
60 pop esi
61 pop edx
62 pop ecx
63 pop ebx
64 pop ebp
65 ret
66GetCPUVendorString endp
67
68 public GetCPUFeatures
69GetCPUFeatures proc near
70 push ebx
71 push ecx
72 push edx
73
74 mov eax, 1
75 cpuid
76
77 mov eax, edx
78
79 pop edx
80 pop ecx
81 pop ebx
82 ret
83GetCPUFeatures endp
84
85 public GetCPUSignature
86GetCPUSignature proc near
87 push ebx
88 push ecx
89 push edx
90
91 mov eax, 1
92 cpuid
93
94 pop edx
95 pop ecx
96 pop ebx
97 ret
98GetCPUSignature endp
99
100
101CODE32 ENDS
102
103 END
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