LCOV - code coverage report
Current view: top level - zephyr/dsp - print_format.h Hit Total Coverage
Test: new.info Lines: 2 3 66.7 %
Date: 2024-12-22 00:14:23

          Line data    Source code
       1           0 : /* Copyright (c) 2023 Google LLC
       2             :  * SPDX-License-Identifier: Apache-2.0
       3             :  */
       4             : 
       5             : #ifndef ZEPHYR_INCLUDE_DSP_PRINT_FORMAT_H_
       6             : #define ZEPHYR_INCLUDE_DSP_PRINT_FORMAT_H_
       7             : 
       8             : #include <inttypes.h>
       9             : #include <stdlib.h>
      10             : #include <zephyr/dsp/types.h>
      11             : 
      12             : /**
      13             :  * @ingroup math_dsp
      14             :  * @defgroup math_printing Helper macros for printing Q values.
      15             :  *
      16             :  * Extends the existing inttypes headers for print formatting. Usage:
      17             :  * @code{c}
      18             :  * printk("Value=%" PRIq "\n", PRIq_arg(value, 6, 2));
      19             :  * @endcode
      20             :  *
      21             :  * For a Q value representing 0.5, the expected output will be:
      22             :  *   "Value=2.000000"
      23             :  *
      24             :  * @{
      25             :  */
      26             : 
      27             : /**
      28             :  * @brief Insert Q value format string
      29             :  */
      30           1 : #define PRIq(precision) "s%" PRIu32 ".%0" STRINGIFY(precision) PRIu32
      31             : 
      32             : static inline int64_t ___PRIq_arg_shift(int64_t q, int shift)
      33             : {
      34             :         if (shift < 0) {
      35             :                 return llabs(q) >> -shift;
      36             :         } else {
      37             :                 return llabs(q) << shift;
      38             :         }
      39             : }
      40             : 
      41             : #define __EXP2(a, b) a ## b
      42             : #define __EXP(a, b) __EXP2(a ## e, b)
      43             : #define __CONSTPOW(C, x) __EXP(C, x)
      44             : 
      45             : #define __PRIq_arg_shift(q, shift)     ___PRIq_arg_shift(q, ((shift) + (8 * (4 - (int)sizeof(q)))))
      46             : #define __PRIq_arg_get(q, shift, h, l) FIELD_GET(GENMASK64(h, l), __PRIq_arg_shift(q, shift))
      47             : #define __PRIq_arg_get_int(q, shift)   __PRIq_arg_get(q, shift, 63, 31)
      48             : #define __PRIq_arg_get_frac(q, precision, shift)                                                   \
      49             :         ((__PRIq_arg_get(q, shift, 30, 0) * __CONSTPOW(1, precision)) / INT32_MAX)
      50             : 
      51             : /**
      52             :  * @brief Insert Q value arguments to print format
      53             :  *
      54             :  * @param[in] q The q value
      55             :  * @param[in] precision Number of decimal points to print
      56             :  * @param[in] shift The "scale" to shift @p q by
      57             :  */
      58           1 : #define PRIq_arg(q, precision, shift)                                                              \
      59             :         ((q) < 0 ? "-" : ""), (uint32_t)__PRIq_arg_get_int(q, shift),                              \
      60             :                 (uint32_t)__PRIq_arg_get_frac(q, precision, shift)
      61             : 
      62             : /**
      63             :  * @}
      64             :  */
      65             : 
      66             : #endif /* ZEPHYR_INCLUDE_DSP_PRINT_FORMAT_H_ */

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