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middleware/usb/include/lib_math.h

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+/**
+ * @file lib_math.h
+ *
+ * Copyright (c) 2021 Semidrive Semiconductor.
+ * All rights reserved.
+ *
+ * Description: Mathematic library header file for USB Device & Host.
+ *
+ * Revision History:
+ * -----------------
+ */
+
+
+#ifndef  LIB_MATH_MODULE_PRESENT
+#define  LIB_MATH_MODULE_PRESENT
+
+
+#include  <cpu.h>
+#include  <cpu_core.h>
+
+#include  <lib_def.h>
+
+
+/*
+*********************************************************************************************************
+*                                            MATH_IS_PWR2()
+*
+* Description : Determine if a value is a power of 2.
+*
+* Argument(s) : nbr           Value.
+*
+* Return(s)   : DEF_YES, 'nbr' is a power of 2.
+*
+*               DEF_NO,  'nbr' is not a power of 2.
+*
+* Caller(s)   : Application.
+*
+* Note(s)     : none.
+*********************************************************************************************************
+*/
+
+#define  MATH_IS_PWR2(nbr)                                 ((((nbr) != 0u) && (((nbr) & ((nbr) - 1u)) == 0u)) ? DEF_YES : DEF_NO)
+
+
+/*
+*********************************************************************************************************
+*                                        MATH_ROUND_INC_UP_PWR2()
+*
+* Description : Round value up to the next (power of 2) increment.
+*
+* Argument(s) : nbr           Value to round.
+*
+*               inc           Increment to use. MUST be a power of 2.
+*
+* Return(s)   : Rounded up value.
+*
+* Caller(s)   : Application.
+*
+* Note(s)     : none.
+*********************************************************************************************************
+*/
+
+#define  MATH_ROUND_INC_UP_PWR2(nbr, inc)                  (((nbr) & ~((inc) - 1)) + (((nbr) & ((inc) - 1)) == 0 ? 0 : (inc)))
+
+
+/*
+*********************************************************************************************************
+*                                          MATH_ROUND_INC_UP()
+*
+* Description : Round value up to the next increment.
+*
+* Argument(s) : nbr           Value to round.
+*
+*               inc           Increment to use.
+*
+* Return(s)   : Rounded up value.
+*
+* Caller(s)   : Application.
+*
+* Note(s)     : none.
+*********************************************************************************************************
+*/
+
+#define  MATH_ROUND_INC_UP(nbr, inc)                       (((nbr) + ((inc) - 1)) / (inc) * (inc))
+
+
+#endif