blob: 322018ebf937af662f36fa03dff84c0b7f46bd29 (
plain)
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
|
/* 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]);
}
|
