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-rw-r--r--cpu_mode_ppc.c40
1 files changed, 40 insertions, 0 deletions
diff --git a/cpu_mode_ppc.c b/cpu_mode_ppc.c
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index 0000000..0071558
--- /dev/null
+++ b/cpu_mode_ppc.c
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+/* Determine CPU support for SIMD on Power PC
+ * Copyright 2004 Phil Karn, KA9Q
+ */
+#include <stdio.h>
+#include "fec.h"
+#ifdef __VEC__
+#include <sys/sysctl.h>
+#endif
+
+/* 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){
+
+ if(Cpu_mode != UNKNOWN)
+ return;
+
+#ifdef __VEC__
+ {
+ /* Ask the OS if we have Altivec support */
+ int selectors[2] = { CTL_HW, HW_VECTORUNIT };
+ int hasVectorUnit = 0;
+ size_t length = sizeof(hasVectorUnit);
+ int error = sysctl(selectors, 2, &hasVectorUnit, &length, NULL, 0);
+ if(0 == error && hasVectorUnit)
+ Cpu_mode = ALTIVEC;
+ else
+ Cpu_mode = PORT;
+ }
+#else
+ Cpu_mode = PORT;
+#endif
+
+ fprintf(stderr,"SIMD CPU detect: %s\n",Cpu_modes[Cpu_mode]);
+}