/* LSP values for first subframe (3.2.5 of G.729, Equation 24)*/
for(i=0; i<lp_order; i++)
+#ifdef G729_BITEXACT
+ lsp_1st[i] = (lsp_2nd[i] >> 1) + (lsp_prev[i] >> 1);
+#else
lsp_1st[i] = (lsp_2nd[i] + lsp_prev[i]) >> 1;
+#endif
ff_acelp_lsp2lpc(lp_1st, lsp_1st, lp_order >> 1);