| /* Determine CPU support for SIMD |
| * Copyright 2004 Phil Karn, KA9Q |
| */ |
| #include <stdio.h> |
| #include "fec.h" |
| |
| /* Various SIMD instruction set names */ |
| char *Cpu_modes[] = {"Unknown","Portable C","x86 Multi Media Extensions (MMX)", |
| "x86 Streaming SIMD Extensions (SSE)", |
| "x86 Streaming SIMD Extensions 2 (SSE2)", |
| "PowerPC G4/G5 Altivec/Velocity Engine"}; |
| |
| enum cpu_mode Cpu_mode; |
| |
| void find_cpu_mode(void){ |
| |
| int f; |
| if(Cpu_mode != UNKNOWN) |
| return; |
| |
| /* Figure out what kind of CPU we have */ |
| f = cpu_features(); |
| if(f & (1<<26)){ /* SSE2 is present */ |
| Cpu_mode = SSE2; |
| } else if(f & (1<<25)){ /* SSE is present */ |
| Cpu_mode = SSE; |
| } else if(f & (1<<23)){ /* MMX is present */ |
| Cpu_mode = MMX; |
| } else { /* No SIMD at all */ |
| Cpu_mode = PORT; |
| } |
| fprintf(stderr,"SIMD CPU detect: %s\n",Cpu_modes[Cpu_mode]); |
| } |
