em_common.h

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/***************************************************************************/
#ifndef EM_COMMON_H
#define EM_COMMON_H

#include "em_device.h"
#include <stdbool.h>

#ifdef __cplusplus
extern "C" {
#endif

/***************************************************************************/
/***************************************************************************/
#if !defined(__GNUC__)
/* Not GCC compilers */

#define SL_MIN(a, b) ((a) < (b) ? (a) : (b))

#define SL_MAX(a, b) ((a) > (b) ? (a) : (b))

#define STRINGIZE(X) #X
#define SL_PACK_START(X) _Pragma(STRINGIZE(pack(X)))
#define SL_PACK_END()    _Pragma("pack()")
#define SL_ATTRIBUTE_PACKED

#if defined(__CC_ARM)

#define SL_ALIGN(X) __align(X)

#define SL_WEAK __attribute__ ((weak))

#define SL_NORETURN __attribute__ ((noreturn))

#define SL_ATTRIBUTE_SECTION(X) __attribute__ ((section(X)))
#endif

#if defined(__ICCARM__)

#define SL_ALIGN(X) _Pragma(STRINGIZE(data_alignment=X))

#define SL_WEAK __weak

#define SL_NORETURN __noreturn

#define SL_ATTRIBUTE_SECTION(X) @ X
#endif

#define SL_ATTRIBUTE_ALIGN(X)

#else // !defined(__GNUC__)
/* GCC compilers */

#define SL_MIN(a, b) __extension__({__typeof__(a) _a = (a); __typeof__(b) _b = (b); _a < _b ? _a : _b;})

#define SL_MAX(a, b) __extension__({__typeof__(a) _a = (a); __typeof__(b) _b = (b); _a > _b ? _a : _b;})

#define SL_ATTRIBUTE_PACKED __attribute__ ((packed))

#define SL_PACK_START(x)

#define SL_PACK_END()

#define SL_ATTRIBUTE_ALIGN(X) __attribute__ ((aligned(X)))

#define SL_ALIGN(X)

#define SL_WEAK __attribute__ ((weak))

#define SL_NORETURN __attribute__ ((noreturn))

#define SL_ATTRIBUTE_SECTION(X) __attribute__ ((section(X)))

#endif // !defined(__GNUC__)

/***************************************************************************/
__STATIC_INLINE uint32_t SL_CTZ(uint32_t value)
{
#if (__CORTEX_M >= 3)
  return __CLZ(__RBIT(value));

#else
  uint32_t zeros;
  for(zeros=0; (zeros<32) && ((value&0x1) == 0); zeros++, value>>=1);
  return zeros;
#endif
}


/* Deprecated function. New code should use @ref SL_CTZ. */
__STATIC_INLINE uint32_t EFM32_CTZ(uint32_t value)
{
  return SL_CTZ(value);
}


#ifdef __cplusplus
}
#endif

#endif /* EM_COMMON_H */