Revision 61df4193 xseg/peers/user/bench-lfsr.c
| b/xseg/peers/user/bench-lfsr.c | ||
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lfsr->state = seed; |
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} |
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lfsr->cached_bit = 1UL << (i-1); |
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lfsr->length = i; |
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lfsr->xnormask = lfsr_create_xnormask(taps[i]); |
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|
| ... | ... | |
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#ifdef STAND_ALONE |
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/* |
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* Sanity-check every LFSR for wrong tap positions.
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* Sanity-check every LFSR for mistakes.
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*/ |
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static int lfsr_check() |
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{
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| ... | ... | |
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for (length = 3; length < 64; length++) {
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if (lfsr_init(&lfsr, pow(2, length) - 1, 1)) |
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return -1; |
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// printf("XNOR-mask: %lu, state: %lu, limit: %lu\n",
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// lfsr.xnormask, lfsr.state, lfsr.limit); |
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period = 1; //Already initialized at 1 |
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upper_limit = pow(2, length); |
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|
| ... | ... | |
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lfsr_next(&lfsr); |
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if (lfsr.state == 1) {
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printf("%u-bit LFSR has correct tap positions\n", length);
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printf("%u-bit LFSR is correct\n", length);
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} |
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else {
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printf("%u-bit LFSR has incorrect tap positions\n", length);
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printf("%u-bit LFSR did not iterate successfully\n", length);
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printf("Current tap positions: ");
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for (i = 0; i < MAX_TAPS && taps[length][i] != 0; i++) |
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printf("%u ", taps[length][i]);
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printf("\n");
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return -1; |
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} |
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// return 0; |
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} |
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return 0; |
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