source: trunk/kCpu/kCpuCompare.c@ 27

Last change on this file since 27 was 2, checked in by bird, 18 years ago

Imported ​http://svn.netlabs.org/repos/libc/trunk/kStuff, revision 3612.
  • Property svn:eol-style set to native
  • Property svn:keywords set to Id Revision
File size: 4.7 KB
RevLine 
[2]1/* $Id: kCpuCompare.c 2 2007-11-16 16:07:14Z bird $ */
2/** @file
3 * kCpu - kCpuCompare.
4 */
5
6/*
7 * Copyright (c) 2006-2007 knut st. osmundsen <bird-kStuff-spam@anduin.net>
8 *
9 * This file is part of kStuff.
10 *
11 * kStuff is free software; you can redistribute it and/or
12 * modify it under the terms of the GNU Lesser General Public
13 * License as published by the Free Software Foundation; either
14 * version 2.1 of the License, or (at your option) any later version.
15 *
16 * In addition to the permissions in the GNU Lesser General Public
17 * License, you are granted unlimited permission to link the compiled
18 * version of this file into combinations with other programs, and to
19 * distribute those combinations without any restriction coming from
20 * the use of this file.
21 *
22 * kStuff is distributed in the hope that it will be useful,
23 * but WITHOUT ANY WARRANTY; without even the implied warranty of
24 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
25 * Lesser General Public License for more details.
26 *
27 * You should have received a copy of the GNU Lesser General Public
28 * License along with kStuff; if not, write to the Free Software
29 * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA
30 * 02110-1301, USA
31 */
32
33/*******************************************************************************
34* Header Files *
35*******************************************************************************/
36#include <k/kCpu.h>
37#include <k/kErrors.h>
38
39
40/**
41 * Compares arch+cpu some code was generated for with a arch+cpu for executing it
42 * to see if it'll work out fine or not.
43 *
44 * @returns 0 if the code is compatible with the cpu.
45 * @returns KCPU_ERR_ARCH_CPU_NOT_COMPATIBLE if the arch+cpu isn't compatible with the code.
46 *
47 * @param enmCodeArch The architecture the code was generated for.
48 * @param enmCodeCpu The cpu the code was generated for.
49 * @param enmArch The architecture to run it on.
50 * @param enmCpu The cpu to run it on.
51 */
52KCPU_DECL(int) kCpuCompare(KCPUARCH enmCodeArch, KCPU enmCodeCpu, KCPUARCH enmArch, KCPU enmCpu)
53{
54 /*
55 * Compare arch and cpu.
56 */
57 if (enmCodeArch != enmArch)
58 return KCPU_ERR_ARCH_CPU_NOT_COMPATIBLE;
59
60 /* exact match is nice. */
61 if (enmCodeCpu == enmCpu)
62 return 0;
63
64 switch (enmArch)
65 {
66 case K_ARCH_X86_16:
67 if (enmCpu < KCPU_FIRST_X86_16 || enmCpu > KCPU_LAST_X86_16)
68 return KERR_INVALID_PARAMETER;
69
70 /* intel? */
71 if (enmCodeCpu <= KCPU_CORE2_16)
72 {
73 /* also intel? */
74 if (enmCpu <= KCPU_CORE2_16)
75 return enmCodeCpu <= enmCpu ? 0 : KCPU_ERR_ARCH_CPU_NOT_COMPATIBLE;
76 switch (enmCpu)
77 {
78 case KCPU_K6_16:
79 return enmCodeCpu <= KCPU_I586 ? 0 : KCPU_ERR_ARCH_CPU_NOT_COMPATIBLE;
80 case KCPU_K7_16:
81 case KCPU_K8_16:
82 default:
83 return enmCodeCpu <= KCPU_I686 ? 0 : KCPU_ERR_ARCH_CPU_NOT_COMPATIBLE;
84 }
85 }
86 /* amd */
87 return enmCpu >= KCPU_K6_16 && enmCpu <= KCPU_K8_16
88 ? 0 : KCPU_ERR_ARCH_CPU_NOT_COMPATIBLE;
89
90 case K_ARCH_X86_32:
91 if (enmCpu < KCPU_FIRST_X86_32 || enmCpu > KCPU_LAST_X86_32)
92 return KERR_INVALID_PARAMETER;
93
94 /* blend? */
95 if (enmCodeCpu == KCPU_X86_32_BLEND)
96 return 0;
97
98 /* intel? */
99 if (enmCodeCpu <= KCPU_CORE2_32)
100 {
101 /* also intel? */
102 if (enmCpu <= KCPU_CORE2_32)
103 return enmCodeCpu <= enmCpu ? 0 : KCPU_ERR_ARCH_CPU_NOT_COMPATIBLE;
104 switch (enmCpu)
105 {
106 case KCPU_K6:
107 return enmCodeCpu <= KCPU_I586 ? 0 : KCPU_ERR_ARCH_CPU_NOT_COMPATIBLE;
108 case KCPU_K7:
109 case KCPU_K8_32:
110 default:
111 return enmCodeCpu <= KCPU_I686 ? 0 : KCPU_ERR_ARCH_CPU_NOT_COMPATIBLE;
112 }
113 }
114 /* amd */
115 return enmCpu >= KCPU_K6 && enmCpu <= KCPU_K8_32
116 ? 0 : KCPU_ERR_ARCH_CPU_NOT_COMPATIBLE;
117
118 case K_ARCH_AMD64:
119 if (enmCpu < KCPU_FIRST_AMD64 || enmCpu > KCPU_LAST_AMD64)
120 return KERR_INVALID_PARAMETER;
121
122 /* blend? */
123 if (enmCodeCpu == KCPU_AMD64_BLEND)
124 return 0;
125 /* this is simple for now. */
126 return KCPU_ERR_ARCH_CPU_NOT_COMPATIBLE;
127
128 default:
129 break;
130 }
131 return KCPU_ERR_ARCH_CPU_NOT_COMPATIBLE;
132}
133
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