| Bill Yi | 4e213d5 | 2015-06-23 13:53:11 -0700 | [diff] [blame] | 1 | /* Determine CPU support for SIMD on Power PC |
| 2 | * Copyright 2004 Phil Karn, KA9Q |
| 3 | */ |
| 4 | #include <stdio.h> |
| 5 | #include "fec.h" |
| 6 | #ifdef __VEC__ |
| 7 | #include <sys/sysctl.h> |
| 8 | #endif |
| 9 | |
| 10 | /* Various SIMD instruction set names */ |
| 11 | char *Cpu_modes[] = {"Unknown","Portable C","x86 Multi Media Extensions (MMX)", |
| 12 | "x86 Streaming SIMD Extensions (SSE)", |
| 13 | "x86 Streaming SIMD Extensions 2 (SSE2)", |
| 14 | "PowerPC G4/G5 Altivec/Velocity Engine"}; |
| 15 | |
| 16 | enum cpu_mode Cpu_mode; |
| 17 | |
| 18 | void find_cpu_mode(void){ |
| 19 | |
| 20 | if(Cpu_mode != UNKNOWN) |
| 21 | return; |
| 22 | |
| 23 | #ifdef __VEC__ |
| 24 | { |
| 25 | /* Ask the OS if we have Altivec support */ |
| 26 | int selectors[2] = { CTL_HW, HW_VECTORUNIT }; |
| 27 | int hasVectorUnit = 0; |
| 28 | size_t length = sizeof(hasVectorUnit); |
| 29 | int error = sysctl(selectors, 2, &hasVectorUnit, &length, NULL, 0); |
| 30 | if(0 == error && hasVectorUnit) |
| 31 | Cpu_mode = ALTIVEC; |
| 32 | else |
| 33 | Cpu_mode = PORT; |
| 34 | } |
| 35 | #else |
| 36 | Cpu_mode = PORT; |
| 37 | #endif |
| 38 | |
| 39 | fprintf(stderr,"SIMD CPU detect: %s\n",Cpu_modes[Cpu_mode]); |
| 40 | } |