1 /******************************************************************************
2 *
3 * Copyright (C) 2018 The Android Open Source Project
4 *
5 * Licensed under the Apache License, Version 2.0 (the "License");
6 * you may not use this file except in compliance with the License.
7 * You may obtain a copy of the License at:
8 *
9 * http://www.apache.org/licenses/LICENSE-2.0
10 *
11 * Unless required by applicable law or agreed to in writing, software
12 * distributed under the License is distributed on an "AS IS" BASIS,
13 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
14 * See the License for the specific language governing permissions and
15 * limitations under the License.
16 *
17 *****************************************************************************
18 * Originally developed and contributed by Ittiam Systems Pvt. Ltd, Bangalore
19 */
20 /*!
21 ******************************************************************************
22 * \file convert_float_to_fix.c
23 *
24 * \brief
25 * This file contain float to fix and fix to float conversion function
26 *
27 * \date
28 *
29 * \author
30 * ittiam
31 *
32 ******************************************************************************
33 */
34 /*****************************************************************************/
35 /* File Includes */
36 /*****************************************************************************/
37 /* System include files */
38 #include <stdio.h>
39 #include <stdlib.h>
40 #include <math.h>
41 #include <time.h>
42 #include <string.h>
43
44 /* User include files */
45 #include "ia_type_def.h"
46 /* #include "num_struct.h" */
47 #include "var_q_operator.h"
48
49 #define ABS(x) (((x) > 0) ? (x) : (-(x)))
50
convert_float_to_fix(float a_f,number_t * a)51 void convert_float_to_fix(float a_f, number_t *a)
52 {
53 double log_a_f;
54 if(a_f != 0)
55 {
56 log_a_f = log(ABS(a_f)) / log(2);
57
58 a->e = 30 - (WORD32)ceil(log_a_f);
59 a->sm = (WORD32)(a_f * pow(2, a->e));
60 }
61 else
62 {
63 a->e = 0;
64 a->sm = 0;
65 }
66 }
67
convert_fix_to_float(number_t a,float * a_f)68 void convert_fix_to_float(number_t a, float *a_f)
69 {
70 *a_f = (float)(a.sm / pow(2, a.e));
71 }
72
73 #ifdef ITT_C6678
74 #pragma CODE_SECTION(convert_fix_to_float, "itt_varq_l1pram");
75 #pragma CODE_SECTION(convert_float_to_fix, "itt_varq_l1pram");
76 #endif
77