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Small improvement of FX.25 RS encoder speed #281

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Small improvement of FX.25 RS encoder speed #281

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12 changes: 6 additions & 6 deletions src/fx25_encode.c
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Original file line number Diff line number Diff line change
Expand Up @@ -69,15 +69,15 @@ void ENCODE_RS(struct rs * restrict rs, DTYPE * restrict data, DTYPE * restrict
for(i=0;i<NN-NROOTS;i++){
feedback = INDEX_OF[data[i] ^ bb[0]];
if(feedback != A0){ /* feedback term is non-zero */
/* Shift and XOR */
for(j=1;j<NROOTS;j++)
bb[j] ^= ALPHA_TO[MODNN(feedback + GENPOLY[NROOTS-j])];
}
/* Shift */
memmove(&bb[0],&bb[1],sizeof(DTYPE)*(NROOTS-1));
if(feedback != A0)
bb[j-1] = bb[j] ^ ALPHA_TO[MODNN(feedback + GENPOLY[NROOTS-j])];
bb[NROOTS-1] = ALPHA_TO[MODNN(feedback + GENPOLY[0])];
else
} else{
/* Shift only */
memmove(&bb[0],&bb[1],sizeof(DTYPE)*(NROOTS-1));
bb[NROOTS-1] = 0;
}
}
}

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