compiler.h

/*
 * Copyright (c) 2020 Raspberry Pi (Trading) Ltd.
 *
 * SPDX-License-Identifier: BSD-3-Clause
 */
 
#ifndef _PICO_PLATFORM_COMPILER_H
#define _PICO_PLATFORM_COMPILER_H
 
#include "hardware/platform_defs.h"
 
#ifndef __ASSEMBLER__
 
#if defined __GNUC__
#include <sys/cdefs.h>
// note LLVM defines __GNUC__
#ifdef __clang__
#define PICO_C_COMPILER_IS_CLANG 1
#else
#define PICO_C_COMPILER_IS_GNU 1
#endif
#elif defined __ICCARM__
#ifndef __aligned
#define __aligned(x)    __attribute__((__aligned__(x)))
#endif
#ifndef __always_inline
#define __always_inline __attribute__((__always_inline__))
#endif
#ifndef __noinline
#define __noinline      __attribute__((__noinline__))
#endif
#ifndef __packed
#define __packed        __attribute__((__packed__))
#endif
#ifndef __printflike
#define __printflike(a, b)
#endif
#ifndef __unused
#define __unused        __attribute__((__unused__))
#endif
#ifndef __used
#define __used          __attribute__((__used__))
#endif
#ifndef __CONCAT1
#define __CONCAT1(a, b) a ## b
#endif
#ifndef __CONCAT
#define __CONCAT(a, b)  __CONCAT1(a, b)
#endif
#ifndef __STRING
#define __STRING(a)     #a
#endif
/* Compatible definitions of GCC builtins */
 
static inline uint __builtin_ctz(uint x) {
  extern uint32_t __ctzsi2(uint32_t);
  return __ctzsi2(x);
}
#define __builtin_expect(x, y) (x)
#define __builtin_isnan(x) __iar_isnan(x)
#else
#error Unsupported toolchain
#endif
 
#define __weak __attribute__((weak))
 
#include "pico/types.h"
 
// GCC_Like_Pragma(x) is a pragma on GNUC compatible compilers
#ifdef __GNUC__
#define GCC_Like_Pragma _Pragma
#else
#define GCC_Like_Pragma(x)
#endif
 
// Clang_Pragma(x) is a pragma on Clang only
#ifdef __clang__
#define Clang_Pragma _Pragma
#else
#define Clang_Pragma(x)
#endif
 
// GCC_Pragma(x) is a pragma on GCC only
#if PICO_C_COMPILER_IS_GNU
#define GCC_Pragma _Pragma
#else
#define GCC_Pragma(x)
#endif
 
#ifdef __cplusplus
extern "C" {
#endif
 
#define __isr
 
#define __packed_aligned __packed __aligned(4)
 
#if PICO_C_COMPILER_IS_GNU && (__GNUC__ <= 6 || (__GNUC__ == 7 && (__GNUC_MINOR__ < 3 || !defined(__cplusplus))))
#define __force_inline inline __always_inline
#else
#define __force_inline __always_inline
#endif
 
#ifndef count_of
#define count_of(a) (sizeof(a)/sizeof((a)[0]))
#endif
 
#ifndef MAX
#define MAX(a, b) ((a)>(b)?(a):(b))
#endif
 
#ifndef MIN
#define MIN(a, b) ((b)>(a)?(a):(b))
#endif
 
#ifdef __ARM_ARCH_ISA_THUMB
#define pico_default_asm(...) __asm (".syntax unified\n" __VA_ARGS__)
#define pico_default_asm_volatile(...) __asm volatile (".syntax unified\n" __VA_ARGS__)
#define pico_default_asm_goto(...) __asm goto (".syntax unified\n" __VA_ARGS__)
#else
#define pico_default_asm(...) __asm (__VA_ARGS__)
#define pico_default_asm_volatile(...) __asm volatile (__VA_ARGS__)
#define pico_default_asm_goto(...) __asm goto (__VA_ARGS__)
#endif
 
__force_inline static void __compiler_memory_barrier(void) {
    pico_default_asm_volatile ("" : : : "memory");
}
 
#define __check_type_compatible(type_a, type_b) static_assert(__builtin_types_compatible_p(type_a, type_b), __STRING(type_a) " is not compatible with " __STRING(type_b));
 
#define WRAPPER_FUNC(x) __wrap_ ## x
#define REAL_FUNC(x) __real_ ## x
 
#ifdef __cplusplus
}
#endif
 
#else // __ASSEMBLER__
 
#if defined __GNUC__
// note LLVM defines __GNUC__
#ifdef __clang__
#define PICO_ASSEMBLER_IS_CLANG 1
#else
#define PICO_ASSEMBLER_IS_GNU 1
#endif
#elif defined __ICCARM__
#else
#error Unsupported toolchain
#endif
 
#define WRAPPER_FUNC_NAME(x) __wrap_##x
 
#endif // !__ASSEMBLER__
 
#endif