40 lines
954 B
C
40 lines
954 B
C
/* 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]);
|
|
}
|