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