185 lines
3.8 KiB
C
185 lines
3.8 KiB
C
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/* Switch to K=9 r=1/2 Viterbi decoder with optional Intel or PowerPC SIMD
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* Copyright Feb 2004, Phil Karn, KA9Q
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*/
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#include <stdio.h>
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#include <stdlib.h>
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#include <memory.h>
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#include "fec.h"
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/* Create a new instance of a Viterbi decoder */
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void *create_viterbi29(int len)
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{
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find_cpu_mode();
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switch (Cpu_mode) {
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case PORT:
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default:
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return create_viterbi29_port(len);
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#ifdef __VEC__
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case ALTIVEC:
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return create_viterbi29_av(len);
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#endif
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#ifdef __i386__
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case MMX:
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return create_viterbi29_mmx(len);
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case SSE:
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return create_viterbi29_sse(len);
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case SSE2:
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return create_viterbi29_sse2(len);
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#endif
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#ifdef __x86_64__
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case SSE2:
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return create_viterbi29_port(len);
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#endif
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}
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}
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void set_viterbi29_polynomial(int polys[2])
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{
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switch (Cpu_mode) {
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case PORT:
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default:
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set_viterbi29_polynomial_port(polys);
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break;
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#ifdef __VEC__
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case ALTIVEC:
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set_viterbi29_polynomial_av(polys);
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break;
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#endif
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#ifdef __i386__
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case MMX:
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set_viterbi29_polynomial_mmx(polys);
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break;
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case SSE:
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set_viterbi29_polynomial_sse(polys);
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break;
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case SSE2:
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set_viterbi29_polynomial_sse2(polys);
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break;
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#endif
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#ifdef __x86_64__
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case SSE2:
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set_viterbi29_polynomial_port(polys);
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break;
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#endif
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}
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}
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/* Initialize Viterbi decoder for start of new frame */
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int init_viterbi29(void *p, int starting_state)
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{
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switch (Cpu_mode) {
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case PORT:
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default:
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return init_viterbi29_port(p, starting_state);
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#ifdef __VEC__
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case ALTIVEC:
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return init_viterbi29_av(p, starting_state);
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#endif
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#ifdef __i386__
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case MMX:
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return init_viterbi29_mmx(p, starting_state);
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case SSE:
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return init_viterbi29_sse(p, starting_state);
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case SSE2:
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return init_viterbi29_sse2(p, starting_state);
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#endif
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#ifdef __x86_64__
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case SSE2:
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return init_viterbi29_port(p, starting_state);
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#endif
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}
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}
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/* Viterbi chainback */
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int chainback_viterbi29(
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void *p,
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unsigned char *data, /* Decoded output data */
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unsigned int nbits, /* Number of data bits */
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unsigned int endstate) /* Terminal encoder state */
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{
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switch (Cpu_mode) {
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case PORT:
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default:
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return chainback_viterbi29_port(p, data, nbits, endstate);
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#ifdef __VEC__
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case ALTIVEC:
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return chainback_viterbi29_av(p, data, nbits, endstate);
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#endif
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#ifdef __i386__
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case MMX:
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return chainback_viterbi29_mmx(p, data, nbits, endstate);
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case SSE:
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return chainback_viterbi29_sse(p, data, nbits, endstate);
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case SSE2:
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return chainback_viterbi29_sse2(p, data, nbits, endstate);
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#endif
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#ifdef __x86_64__
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case SSE2:
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return chainback_viterbi29_port(p, data, nbits, endstate);
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#endif
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}
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}
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/* Delete instance of a Viterbi decoder */
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void delete_viterbi29(void *p)
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{
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switch (Cpu_mode) {
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case PORT:
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default:
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delete_viterbi29_port(p);
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break;
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#ifdef __VEC__
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case ALTIVEC:
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delete_viterbi29_av(p);
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break;
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#endif
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#ifdef __i386__
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case MMX:
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delete_viterbi29_mmx(p);
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break;
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case SSE:
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delete_viterbi29_sse(p);
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break;
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case SSE2:
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delete_viterbi29_sse2(p);
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break;
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#endif
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#ifdef __x86_64__
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case SSE2:
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delete_viterbi29_port(p);
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break;
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#endif
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}
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}
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/* Update decoder with a block of demodulated symbols
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* Note that nbits is the number of decoded data bits, not the number
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* of symbols!
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*/
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int update_viterbi29_blk(void *p, unsigned char syms[], int nbits)
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{
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switch (Cpu_mode) {
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case PORT:
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default:
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return update_viterbi29_blk_port(p, syms, nbits);
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#ifdef __VEC__
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case ALTIVEC:
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return update_viterbi29_blk_av(p, syms, nbits);
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#endif
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#ifdef __i386__
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case MMX:
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return update_viterbi29_blk_mmx(p, syms, nbits);
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case SSE:
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return update_viterbi29_blk_sse(p, syms, nbits);
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case SSE2:
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return update_viterbi29_blk_sse2(p, syms, nbits);
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#endif
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#ifdef __x86_64__
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case SSE2:
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return update_viterbi29_blk_port(p, syms, nbits);
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#endif
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}
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}
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