1*c83a76b0SSuyog Pawar /****************************************************************************** 2*c83a76b0SSuyog Pawar * 3*c83a76b0SSuyog Pawar * Copyright (C) 2018 The Android Open Source Project 4*c83a76b0SSuyog Pawar * 5*c83a76b0SSuyog Pawar * Licensed under the Apache License, Version 2.0 (the "License"); 6*c83a76b0SSuyog Pawar * you may not use this file except in compliance with the License. 7*c83a76b0SSuyog Pawar * You may obtain a copy of the License at: 8*c83a76b0SSuyog Pawar * 9*c83a76b0SSuyog Pawar * http://www.apache.org/licenses/LICENSE-2.0 10*c83a76b0SSuyog Pawar * 11*c83a76b0SSuyog Pawar * Unless required by applicable law or agreed to in writing, software 12*c83a76b0SSuyog Pawar * distributed under the License is distributed on an "AS IS" BASIS, 13*c83a76b0SSuyog Pawar * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. 14*c83a76b0SSuyog Pawar * See the License for the specific language governing permissions and 15*c83a76b0SSuyog Pawar * limitations under the License. 16*c83a76b0SSuyog Pawar * 17*c83a76b0SSuyog Pawar ***************************************************************************** 18*c83a76b0SSuyog Pawar * Originally developed and contributed by Ittiam Systems Pvt. Ltd, Bangalore 19*c83a76b0SSuyog Pawar */ 20*c83a76b0SSuyog Pawar #ifndef VAR_Q_OPERATOR_H 21*c83a76b0SSuyog Pawar #define VAR_Q_OPERATOR_H 22*c83a76b0SSuyog Pawar 23*c83a76b0SSuyog Pawar typedef struct 24*c83a76b0SSuyog Pawar { 25*c83a76b0SSuyog Pawar WORD32 sm; /* MSB 1 bit sign & rest magnitude */ 26*c83a76b0SSuyog Pawar WORD32 e; /* Q-format */ 27*c83a76b0SSuyog Pawar } number_t; 28*c83a76b0SSuyog Pawar 29*c83a76b0SSuyog Pawar void mult32_var_q(number_t a, number_t b, number_t *c); 30*c83a76b0SSuyog Pawar 31*c83a76b0SSuyog Pawar void div32_var_q(number_t a, number_t b, number_t *c); 32*c83a76b0SSuyog Pawar 33*c83a76b0SSuyog Pawar void add32_var_q(number_t a, number_t b, number_t *c); 34*c83a76b0SSuyog Pawar 35*c83a76b0SSuyog Pawar void sub32_var_q(number_t a, number_t b, number_t *c); 36*c83a76b0SSuyog Pawar 37*c83a76b0SSuyog Pawar void sqrt32_var_q(number_t a, number_t *c); 38*c83a76b0SSuyog Pawar 39*c83a76b0SSuyog Pawar void number_t_to_word32(number_t num_a, WORD32 *a); 40*c83a76b0SSuyog Pawar 41*c83a76b0SSuyog Pawar void convert_float_to_fix(float a_f, number_t *a); 42*c83a76b0SSuyog Pawar 43*c83a76b0SSuyog Pawar void convert_fix_to_float(number_t a, float *a_f); 44*c83a76b0SSuyog Pawar 45*c83a76b0SSuyog Pawar #define SET_VAR_Q(a, b, c) \ 46*c83a76b0SSuyog Pawar { \ 47*c83a76b0SSuyog Pawar (a).sm = (b); \ 48*c83a76b0SSuyog Pawar (a).e = (c); \ 49*c83a76b0SSuyog Pawar } 50*c83a76b0SSuyog Pawar 51*c83a76b0SSuyog Pawar /*right shift greated than 32 bit for word32 variable is undefined*/ 52*c83a76b0SSuyog Pawar #define convert_varq_to_fixq(varq, a, q_fact) \ 53*c83a76b0SSuyog Pawar { \ 54*c83a76b0SSuyog Pawar if((varq).e > q_fact) \ 55*c83a76b0SSuyog Pawar { \ 56*c83a76b0SSuyog Pawar if(((varq).e - q_fact) >= (WORD32)(sizeof(WORD32) * 8)) \ 57*c83a76b0SSuyog Pawar { \ 58*c83a76b0SSuyog Pawar *a = 0; \ 59*c83a76b0SSuyog Pawar } \ 60*c83a76b0SSuyog Pawar else \ 61*c83a76b0SSuyog Pawar { \ 62*c83a76b0SSuyog Pawar *a = (varq).sm >> ((varq).e - q_fact); \ 63*c83a76b0SSuyog Pawar } \ 64*c83a76b0SSuyog Pawar } \ 65*c83a76b0SSuyog Pawar else \ 66*c83a76b0SSuyog Pawar *a = (varq).sm << (q_fact - (varq).e); \ 67*c83a76b0SSuyog Pawar } 68*c83a76b0SSuyog Pawar 69*c83a76b0SSuyog Pawar #define SET_VARQ_FRM_FIXQ(fixq, var_q, q_fact) \ 70*c83a76b0SSuyog Pawar { \ 71*c83a76b0SSuyog Pawar (var_q).sm = fixq; \ 72*c83a76b0SSuyog Pawar (var_q).e = q_fact; \ 73*c83a76b0SSuyog Pawar } 74*c83a76b0SSuyog Pawar #endif 75