75 lines
3.8 KiB
C
75 lines
3.8 KiB
C
/******************************************************************************
|
|
*
|
|
* Copyright (C) 2018 The Android Open Source Project
|
|
*
|
|
* Licensed under the Apache License, Version 2.0 (the "License");
|
|
* you may not use this file except in compliance with the License.
|
|
* You may obtain a copy of the License at:
|
|
*
|
|
* http://www.apache.org/licenses/LICENSE-2.0
|
|
*
|
|
* Unless required by applicable law or agreed to in writing, software
|
|
* distributed under the License is distributed on an "AS IS" BASIS,
|
|
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
|
|
* See the License for the specific language governing permissions and
|
|
* limitations under the License.
|
|
*
|
|
*****************************************************************************
|
|
* Originally developed and contributed by Ittiam Systems Pvt. Ltd, Bangalore
|
|
*/
|
|
#ifndef VAR_Q_OPERATOR_H
|
|
#define VAR_Q_OPERATOR_H
|
|
|
|
typedef struct
|
|
{
|
|
WORD32 sm; /* MSB 1 bit sign & rest magnitude */
|
|
WORD32 e; /* Q-format */
|
|
} number_t;
|
|
|
|
void mult32_var_q(number_t a, number_t b, number_t *c);
|
|
|
|
void div32_var_q(number_t a, number_t b, number_t *c);
|
|
|
|
void add32_var_q(number_t a, number_t b, number_t *c);
|
|
|
|
void sub32_var_q(number_t a, number_t b, number_t *c);
|
|
|
|
void sqrt32_var_q(number_t a, number_t *c);
|
|
|
|
void number_t_to_word32(number_t num_a, WORD32 *a);
|
|
|
|
void convert_float_to_fix(float a_f, number_t *a);
|
|
|
|
void convert_fix_to_float(number_t a, float *a_f);
|
|
|
|
#define SET_VAR_Q(a, b, c) \
|
|
{ \
|
|
(a).sm = (b); \
|
|
(a).e = (c); \
|
|
}
|
|
|
|
/*right shift greated than 32 bit for word32 variable is undefined*/
|
|
#define convert_varq_to_fixq(varq, a, q_fact) \
|
|
{ \
|
|
if((varq).e > q_fact) \
|
|
{ \
|
|
if(((varq).e - q_fact) >= (WORD32)(sizeof(WORD32) * 8)) \
|
|
{ \
|
|
*a = 0; \
|
|
} \
|
|
else \
|
|
{ \
|
|
*a = (varq).sm >> ((varq).e - q_fact); \
|
|
} \
|
|
} \
|
|
else \
|
|
*a = (varq).sm << (q_fact - (varq).e); \
|
|
}
|
|
|
|
#define SET_VARQ_FRM_FIXQ(fixq, var_q, q_fact) \
|
|
{ \
|
|
(var_q).sm = fixq; \
|
|
(var_q).e = q_fact; \
|
|
}
|
|
#endif
|