Home | History | Annotate | Download | only in jni 
      1 /*
      2  * Copyright (C) 2010 The Android Open Source Project
      3  *
      4  * Licensed under the Apache License, Version 2.0 (the "License");
      5  * you may not use this file except in compliance with the License.
      6  * You may obtain a copy of the License at
      7  *
      8  *      http://www.apache.org/licenses/LICENSE-2.0
      9  *
     10  * Unless required by applicable law or agreed to in writing, software
     11  * distributed under the License is distributed on an "AS IS" BASIS,
     12  * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
     13  * See the License for the specific language governing permissions and
     14  * limitations under the License.
     15  */
     16 #define __STDC_FORMAT_MACROS 1
     17 
     18 #include <cpu-features.h>
     19 #include <inttypes.h>
     20 #include <stdio.h>
     21 
     22 int main(void)
     23 {
     24     AndroidCpuFamily family = android_getCpuFamily();
     25     switch (family) {
     26     case ANDROID_CPU_FAMILY_ARM:
     27         printf("CPU family is ARM\n");
     28         break;
     29     case ANDROID_CPU_FAMILY_X86:
     30         printf("CPU family is x86\n");
     31         break;
     32     case ANDROID_CPU_FAMILY_MIPS:
     33         printf("CPU family is MIPS\n");
     34         break;
     35     case ANDROID_CPU_FAMILY_ARM64:
     36         printf("CPU family is ARM64\n");
     37         break;
     38     case ANDROID_CPU_FAMILY_X86_64:
     39         printf("CPU family is x86_64\n");
     40         break;
     41     case ANDROID_CPU_FAMILY_MIPS64:
     42         printf("CPU family is MIPS64\n");
     43         break;
     44     default:
     45         fprintf(stderr, "Unsupported CPU family: %d\n", family);
     46         return 1;
     47     }
     48 
     49     if (family == ANDROID_CPU_FAMILY_ARM) {
     50         uint64_t features = android_getCpuFeatures();
     51         printf( "Supported ARM features:\n");
     52 #define CHECK(name) \
     53         if ((features & ANDROID_CPU_ARM_FEATURE_## name) != 0) { \
     54             printf( "  "#name"\n" ); \
     55         }
     56         CHECK(LDREX_STREX)
     57         CHECK(VFPv2)
     58         CHECK(ARMv7)
     59         CHECK(VFPv3)
     60         CHECK(VFP_D32)
     61         CHECK(VFP_FP16)
     62         CHECK(VFP_FMA)
     63         CHECK(NEON)
     64         CHECK(NEON_FMA)
     65         CHECK(IDIV_ARM)
     66         CHECK(IDIV_THUMB2)
     67         CHECK(iWMMXt)
     68 #undef CHECK
     69     }
     70 
     71 #ifdef __arm__
     72     uint32_t cpu_id = android_getCpuIdArm();
     73     printf( "ARM CpuID: %08x\n", cpu_id);
     74     printf( "   implementer: %02x\n", (cpu_id >> 24) & 0xff);
     75     printf( "   variant    : %02x\n", (cpu_id >> 20) & 0x0f);
     76     printf( "   part       : %03x\n", (cpu_id >> 4) & 0xfff);
     77     printf( "   revision   : %x\n",    cpu_id & 0x0f);
     78 #endif
     79 
     80     if (family == ANDROID_CPU_FAMILY_X86) {
     81         uint64_t features = android_getCpuFeatures();
     82         printf( "Supported x86 features:\n");
     83 #define CHECK(name) \
     84         if ((features & ANDROID_CPU_X86_FEATURE_## name) != 0) { \
     85             printf( "  "#name"\n" ); \
     86         }
     87         CHECK(SSSE3)
     88         CHECK(POPCNT)
     89         CHECK(MOVBE)
     90 #undef CHECK
     91     }
     92 
     93     int result = 0;
     94 
     95     // Check that the CPU features mask is empty for anything that isn't
     96     // 32-bit ARM or 32-bit x86.
     97     if (family != ANDROID_CPU_FAMILY_ARM &&
     98         family != ANDROID_CPU_FAMILY_X86) {
     99         uint64_t features = android_getCpuFeatures();
    100         if (features != 0) {
    101             printf("ERROR: Unexpected CPU features mask: %016" PRIX64 "\n",
    102                    features);
    103             result = 1;
    104         }
    105     }
    106 
    107     int count = android_getCpuCount();
    108     printf( "Number of CPU cores: %d\n", count);
    109     return result;
    110 }
    111