Initial code
diff --git a/viterbi29.c b/viterbi29.c
new file mode 100644
index 0000000..80cbb33
--- /dev/null
+++ b/viterbi29.c
@@ -0,0 +1,152 @@
+/* Switch to K=9 r=1/2 Viterbi decoder with optional Intel or PowerPC SIMD
+ * Copyright Feb 2004, Phil Karn, KA9Q
+ */
+#include <stdio.h>
+#include <stdlib.h>
+#include <memory.h>
+#include "fec.h"
+
+/* Create a new instance of a Viterbi decoder */
+void *create_viterbi29(int len){
+ find_cpu_mode();
+
+ switch(Cpu_mode){
+ case PORT:
+ default:
+ return create_viterbi29_port(len);
+#ifdef __VEC__
+ case ALTIVEC:
+ return create_viterbi29_av(len);
+#endif
+#ifdef __i386__
+ case MMX:
+ return create_viterbi29_mmx(len);
+ case SSE:
+ return create_viterbi29_sse(len);
+ case SSE2:
+ return create_viterbi29_sse2(len);
+#endif
+ }
+}
+
+void set_viterbi29_polynomial(int polys[2]){
+ switch(Cpu_mode){
+ case PORT:
+ default:
+ set_viterbi29_polynomial_port(polys);
+ break;
+#ifdef __VEC__
+ case ALTIVEC:
+ set_viterbi29_polynomial_av(polys);
+ break;
+#endif
+#ifdef __i386__
+ case MMX:
+ set_viterbi29_polynomial_mmx(polys);
+ break;
+ case SSE:
+ set_viterbi29_polynomial_sse(polys);
+ break;
+ case SSE2:
+ set_viterbi29_polynomial_sse2(polys);
+ break;
+#endif
+ }
+}
+
+/* Initialize Viterbi decoder for start of new frame */
+int init_viterbi29(void *p,int starting_state){
+ switch(Cpu_mode){
+ case PORT:
+ default:
+ return init_viterbi29_port(p,starting_state);
+#ifdef __VEC__
+ case ALTIVEC:
+ return init_viterbi29_av(p,starting_state);
+#endif
+#ifdef __i386__
+ case MMX:
+ return init_viterbi29_mmx(p,starting_state);
+ case SSE:
+ return init_viterbi29_sse(p,starting_state);
+ case SSE2:
+ return init_viterbi29_sse2(p,starting_state);
+#endif
+ }
+}
+
+/* Viterbi chainback */
+int chainback_viterbi29(
+ void *p,
+ unsigned char *data, /* Decoded output data */
+ unsigned int nbits, /* Number of data bits */
+ unsigned int endstate){ /* Terminal encoder state */
+
+ switch(Cpu_mode){
+ case PORT:
+ default:
+ return chainback_viterbi29_port(p,data,nbits,endstate);
+#ifdef __VEC__
+ case ALTIVEC:
+ return chainback_viterbi29_av(p,data,nbits,endstate);
+#endif
+#ifdef __i386__
+ case MMX:
+ return chainback_viterbi29_mmx(p,data,nbits,endstate);
+ case SSE:
+ return chainback_viterbi29_sse(p,data,nbits,endstate);
+ case SSE2:
+ return chainback_viterbi29_sse2(p,data,nbits,endstate);
+#endif
+ }
+}
+
+/* Delete instance of a Viterbi decoder */
+void delete_viterbi29(void *p){
+ switch(Cpu_mode){
+ case PORT:
+ default:
+ delete_viterbi29_port(p);
+ break;
+#ifdef __VEC__
+ case ALTIVEC:
+ delete_viterbi29_av(p);
+ break;
+#endif
+#ifdef __i386__
+ case MMX:
+ delete_viterbi29_mmx(p);
+ break;
+ case SSE:
+ delete_viterbi29_sse(p);
+ break;
+ case SSE2:
+ delete_viterbi29_sse2(p);
+ break;
+#endif
+ }
+}
+
+/* Update decoder with a block of demodulated symbols
+ * Note that nbits is the number of decoded data bits, not the number
+ * of symbols!
+ */
+int update_viterbi29_blk(void *p,unsigned char syms[],int nbits){
+ switch(Cpu_mode){
+ case PORT:
+ default:
+ return update_viterbi29_blk_port(p,syms,nbits);
+#ifdef __VEC__
+ case ALTIVEC:
+ return update_viterbi29_blk_av(p,syms,nbits);
+#endif
+#ifdef __i386__
+ case MMX:
+ return update_viterbi29_blk_mmx(p,syms,nbits);
+ case SSE:
+ return update_viterbi29_blk_sse(p,syms,nbits);
+ case SSE2:
+ return update_viterbi29_blk_sse2(p,syms,nbits);
+#endif
+ }
+}