bass_gpr
controls[nctl + 0].gpr[z * 2 + j] = bass_gpr + z * 2 + j;
A_OP(icode, &ptr, iMAC0, A_C_00000000, A_C_00000000, A_GPR(d), A_GPR(bass_gpr + 0 + j));
A_OP(icode, &ptr, iMACMV, A_GPR(k+1), A_GPR(k), A_GPR(k+1), A_GPR(bass_gpr + 4 + j));
A_OP(icode, &ptr, iMACMV, A_GPR(k), A_GPR(d), A_GPR(k), A_GPR(bass_gpr + 2 + j));
A_OP(icode, &ptr, iMACMV, A_GPR(k+3), A_GPR(k+2), A_GPR(k+3), A_GPR(bass_gpr + 8 + j));
A_OP(icode, &ptr, iMAC0, A_GPR(k+2), A_GPR_ACCU, A_GPR(k+2), A_GPR(bass_gpr + 6 + j));