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| 1 | +/*! | |
| 2 | + * \copy | |
| 3 | + * Copyright (c) 2009-2013, Cisco Systems | |
| 4 | + * All rights reserved. | |
| 5 | + * | |
| 6 | + * Redistribution and use in source and binary forms, with or without | |
| 7 | + * modification, are permitted provided that the following conditions | |
| 8 | + * are met: | |
| 9 | + * | |
| 10 | + * * Redistributions of source code must retain the above copyright | |
| 11 | + * notice, this list of conditions and the following disclaimer. | |
| 12 | + * | |
| 13 | + * * Redistributions in binary form must reproduce the above copyright | |
| 14 | + * notice, this list of conditions and the following disclaimer in | |
| 15 | + * the documentation and/or other materials provided with the | |
| 16 | + * distribution. | |
| 17 | + * | |
| 18 | + * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS | |
| 19 | + * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT | |
| 20 | + * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS | |
| 21 | + * FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE | |
| 22 | + * COPYRIGHT HOLDER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, | |
| 23 | + * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, | |
| 24 | + * BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; | |
| 25 | + * LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER | |
| 26 | + * CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT | |
| 27 | + * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN | |
| 28 | + * ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE | |
| 29 | + * POSSIBILITY OF SUCH DAMAGE. | |
| 30 | + * | |
| 31 | + * | |
| 32 | + * \file cpu.cpp | |
| 33 | + * | |
| 34 | + * \brief CPU compatibility detection | |
| 35 | + * | |
| 36 | + * \date 04/29/2009 Created | |
| 37 | + * | |
| 38 | + ************************************************************************************* | |
| 39 | + */ | |
| 40 | +#include <string.h> | |
| 41 | + | |
| 42 | +#include "cpu.h" | |
| 43 | +#include "cpu_core.h" | |
| 44 | + | |
| 45 | +namespace WelsDec { | |
| 46 | + | |
| 47 | +#define CPU_Vender_AMD "AuthenticAMD" | |
| 48 | +#define CPU_Vender_INTEL "GenuineIntel" | |
| 49 | +#define CPU_Vender_CYRIX "CyrixInstead" | |
| 50 | + | |
| 51 | +#if defined(X86_ASM) | |
| 52 | + | |
| 53 | +uint32_t WelsCPUFeatureDetect( int32_t *pNumberOfLogicProcessors ) | |
| 54 | +{ | |
| 55 | + uint32_t uiCPU = 0; | |
| 56 | + uint32_t uiFeatureA = 0, uiFeatureB = 0, uiFeatureC = 0, uiFeatureD = 0; | |
| 57 | + int32_t CacheLineSize = 0; | |
| 58 | + int8_t chVenderName[16] = { 0 }; | |
| 59 | + | |
| 60 | + if( !WelsCPUIdVerify() ) | |
| 61 | + { | |
| 62 | + /* cpuid is not supported in cpu */ | |
| 63 | + return 0; | |
| 64 | + } | |
| 65 | + | |
| 66 | + WelsCPUId( 0, &uiFeatureA, (uint32_t*)&chVenderName[0],(uint32_t*)&chVenderName[8],(uint32_t*)&chVenderName[4] ); | |
| 67 | + if( uiFeatureA == 0 ) | |
| 68 | + { | |
| 69 | + /* maximum input value for basic cpuid information */ | |
| 70 | + return 0; | |
| 71 | + } | |
| 72 | + | |
| 73 | + WelsCPUId( 1, &uiFeatureA, &uiFeatureB, &uiFeatureC, &uiFeatureD ); | |
| 74 | + if( (uiFeatureD & 0x00800000) == 0 ) | |
| 75 | + { | |
| 76 | + /* Basic MMX technology is not support in cpu, mean nothing for us so return here */ | |
| 77 | + return 0; | |
| 78 | + } | |
| 79 | + | |
| 80 | + uiCPU = WELS_CPU_MMX; | |
| 81 | + if( uiFeatureD & 0x02000000 ) | |
| 82 | + { | |
| 83 | + /* SSE technology is identical to AMD MMX extensions */ | |
| 84 | + uiCPU |= WELS_CPU_MMXEXT|WELS_CPU_SSE; | |
| 85 | + } | |
| 86 | + if( uiFeatureD & 0x04000000 ) | |
| 87 | + { | |
| 88 | + /* SSE2 support here */ | |
| 89 | + uiCPU |= WELS_CPU_SSE2; | |
| 90 | + } | |
| 91 | + if ( uiFeatureD & 0x00000001 ) | |
| 92 | + { | |
| 93 | + /* x87 FPU on-chip checking */ | |
| 94 | + uiCPU |= WELS_CPU_FPU; | |
| 95 | + } | |
| 96 | + if ( uiFeatureD & 0x00008000 ) | |
| 97 | + { | |
| 98 | + /* CMOV instruction checking */ | |
| 99 | + uiCPU |= WELS_CPU_CMOV; | |
| 100 | + } | |
| 101 | + if ( !strcmp((const str_t*)chVenderName,CPU_Vender_INTEL) ) // confirmed_safe_unsafe_usage | |
| 102 | + { | |
| 103 | + if ( uiFeatureD & 0x10000000 ) | |
| 104 | + { | |
| 105 | + /* Multi-Threading checking: contains of multiple logic processors */ | |
| 106 | + uiCPU |= WELS_CPU_HTT; | |
| 107 | + } | |
| 108 | + } | |
| 109 | + | |
| 110 | + if( uiFeatureC & 0x00000001 ){ | |
| 111 | + /* SSE3 support here */ | |
| 112 | + uiCPU |= WELS_CPU_SSE3; | |
| 113 | + } | |
| 114 | + if( uiFeatureC & 0x00000200 ){ | |
| 115 | + /* SSSE3 support here */ | |
| 116 | + uiCPU |= WELS_CPU_SSSE3; | |
| 117 | + } | |
| 118 | + if( uiFeatureC & 0x00080000 ){ | |
| 119 | + /* SSE4.1 support here, 45nm Penryn processor */ | |
| 120 | + uiCPU |= WELS_CPU_SSE41; | |
| 121 | + } | |
| 122 | + if( uiFeatureC & 0x00100000 ){ | |
| 123 | + /* SSE4.2 support here, next generation Nehalem processor */ | |
| 124 | + uiCPU |= WELS_CPU_SSE42; | |
| 125 | + } | |
| 126 | + if ( WelsCPUSupportAVX( uiFeatureA, uiFeatureC ) ) | |
| 127 | + { | |
| 128 | + /* AVX supported */ | |
| 129 | + uiCPU |= WELS_CPU_AVX; | |
| 130 | + } | |
| 131 | + if ( WelsCPUSupportFMA( uiFeatureA, uiFeatureC ) ) | |
| 132 | + { | |
| 133 | + /* AVX FMA supported */ | |
| 134 | + uiCPU |= WELS_CPU_FMA; | |
| 135 | + } | |
| 136 | + if ( uiFeatureC & 0x02000000 ) | |
| 137 | + { | |
| 138 | + /* AES checking */ | |
| 139 | + uiCPU |= WELS_CPU_AES; | |
| 140 | + } | |
| 141 | + if ( uiFeatureC & 0x00400000 ) | |
| 142 | + { | |
| 143 | + /* MOVBE checking */ | |
| 144 | + uiCPU |= WELS_CPU_MOVBE; | |
| 145 | + } | |
| 146 | + | |
| 147 | + if ( pNumberOfLogicProcessors != NULL ) | |
| 148 | + { | |
| 149 | + // HTT enabled on chip | |
| 150 | + *pNumberOfLogicProcessors = (uiFeatureB & 0x00ff0000) >> 16; // feature bits: 23-16 on returned EBX | |
| 151 | + } | |
| 152 | + | |
| 153 | + WelsCPUId( 0x80000000, &uiFeatureA, &uiFeatureB, &uiFeatureC, &uiFeatureD ); | |
| 154 | + | |
| 155 | + if( (!strcmp((const str_t*)chVenderName,CPU_Vender_AMD)) && (uiFeatureA>=0x80000001) ){ // confirmed_safe_unsafe_usage | |
| 156 | + WelsCPUId(0x80000001, &uiFeatureA, &uiFeatureB, &uiFeatureC, &uiFeatureD ); | |
| 157 | + if( uiFeatureD&0x00400000 ){ | |
| 158 | + uiCPU |= WELS_CPU_MMXEXT; | |
| 159 | + } | |
| 160 | + if( uiFeatureD&0x80000000 ){ | |
| 161 | + uiCPU |= WELS_CPU_3DNOW; | |
| 162 | + } | |
| 163 | + } | |
| 164 | + | |
| 165 | + if( !strcmp((const str_t*)chVenderName,CPU_Vender_INTEL) ){ // confirmed_safe_unsafe_usage | |
| 166 | + int32_t family, model; | |
| 167 | + | |
| 168 | + WelsCPUId(1, &uiFeatureA, &uiFeatureB, &uiFeatureC, &uiFeatureD); | |
| 169 | + family = ((uiFeatureA>>8)&0xf) + ((uiFeatureA>>20)&0xff); | |
| 170 | + model = ((uiFeatureA>>4)&0xf) + ((uiFeatureA>>12)&0xf0); | |
| 171 | + | |
| 172 | + if( (family==6) && (model==9 || model==13 || model==14) ){ | |
| 173 | + uiCPU &= ~(WELS_CPU_SSE2|WELS_CPU_SSE3); | |
| 174 | + } | |
| 175 | + } | |
| 176 | + | |
| 177 | + // get cache line size | |
| 178 | + if( (!strcmp((const str_t*)chVenderName,CPU_Vender_INTEL)) || !(strcmp((const str_t*)chVenderName,CPU_Vender_CYRIX)) ){ // confirmed_safe_unsafe_usage | |
| 179 | + WelsCPUId(1, &uiFeatureA, &uiFeatureB, &uiFeatureC, &uiFeatureD); | |
| 180 | + | |
| 181 | + CacheLineSize = (uiFeatureB&0xff00)>>5; // ((clflush_line_size >> 8) << 3), CLFLUSH_line_size * 8 = CacheLineSize_in_byte | |
| 182 | + | |
| 183 | + if( CacheLineSize == 128 ){ | |
| 184 | + uiCPU |= WELS_CPU_CACHELINE_128; | |
| 185 | + } | |
| 186 | + else if( CacheLineSize == 64 ){ | |
| 187 | + uiCPU |= WELS_CPU_CACHELINE_64; | |
| 188 | + } | |
| 189 | + else if( CacheLineSize == 32 ){ | |
| 190 | + uiCPU |= WELS_CPU_CACHELINE_32; | |
| 191 | + } | |
| 192 | + else if( CacheLineSize == 16 ){ | |
| 193 | + uiCPU |= WELS_CPU_CACHELINE_16; | |
| 194 | + } | |
| 195 | + } | |
| 196 | + | |
| 197 | + return uiCPU; | |
| 198 | +} | |
| 199 | + | |
| 200 | + | |
| 201 | +void WelsCPURestore( const uint32_t kuiCPU ) | |
| 202 | +{ | |
| 203 | + if( kuiCPU & (WELS_CPU_MMX|WELS_CPU_MMXEXT|WELS_CPU_3DNOW|WELS_CPU_3DNOWEXT) ) | |
| 204 | + { | |
| 205 | + WelsEmms(); | |
| 206 | + } | |
| 207 | +} | |
| 208 | + | |
| 209 | +#endif | |
| 210 | + | |
| 211 | +} // namespace WelsDec | |