static void ff_acelp_interpolatef_mips(float *out, const float *in, const float *filter_coeffs, int precision, int frac_pos, int filter_length, int length) { int n, i; int prec = precision * 4; int fc_offset = precision - frac_pos; float in_val_p, in_val_m, fc_val_p, fc_val_m; for (n = 0; n < length; n++) { /** * four pointers are defined in order to minimize number of * computations done in inner loop */ const float *p_in_p = &in[n]; const float *p_in_m = &in[n-1]; const float *p_filter_coeffs_p = &filter_coeffs[frac_pos]; const float *p_filter_coeffs_m = filter_coeffs + fc_offset; float v = 0; for (i = 0; i < filter_length;i++) { __asm__ volatile ( "lwc1 %[in_val_p], 0(%[p_in_p]) \n\t" "lwc1 %[fc_val_p], 0(%[p_filter_coeffs_p]) \n\t" "lwc1 %[in_val_m], 0(%[p_in_m]) \n\t" "lwc1 %[fc_val_m], 0(%[p_filter_coeffs_m]) \n\t" "addiu %[p_in_p], %[p_in_p], 4 \n\t" "madd.s %[v],%[v], %[in_val_p],%[fc_val_p] \n\t" "addiu %[p_in_m], %[p_in_m], -4 \n\t" "addu %[p_filter_coeffs_p], %[p_filter_coeffs_p], %[prec] \n\t" "addu %[p_filter_coeffs_m], %[p_filter_coeffs_m], %[prec] \n\t" "madd.s %[v],%[v],%[in_val_m], %[fc_val_m] \n\t" : [v] "=&f" (v),[p_in_p] "+r" (p_in_p), [p_in_m] "+r" (p_in_m), [p_filter_coeffs_p] "+r" (p_filter_coeffs_p), [in_val_p] "=&f" (in_val_p), [in_val_m] "=&f" (in_val_m), [fc_val_p] "=&f" (fc_val_p), [fc_val_m] "=&f" (fc_val_m), [p_filter_coeffs_m] "+r" (p_filter_coeffs_m) : [prec] "r" (prec) : "memory" ); } out[n] = v; } }