iccarm.h

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/*
 * Copyright (c) 2025 IAR Systems AB
 *
 * SPDX-License-Identifier: Apache-2.0
 */
 
#ifndef ZEPHYR_INCLUDE_TOOLCHAIN_ICCARM_H_
#define ZEPHYR_INCLUDE_TOOLCHAIN_ICCARM_H_
 
/* ICCARM supports its own #pragma diag_{warning,default,error,warning}. */
/* #define TOOLCHAIN_HAS_PRAGMA_DIAG 0 */
 
#define TOOLCHAIN_HAS_C_GENERIC 1
 
#define TOOLCHAIN_HAS_C_AUTO_TYPE 1
 
/* #define TOOLCHAIN_HAS_ZLA 1 */
 
/*
 * IAR do not define __BYTE_ORDER__, so it must be manually
 * detected and defined using arch-specific definitions.
 */
 
#ifndef _LINKER
 
#ifndef __ORDER_BIG_ENDIAN__
#define __ORDER_BIG_ENDIAN__            (1)
#endif /* __ORDER_BIG_ENDIAN__ */
 
#ifndef __ORDER_LITTLE_ENDIAN__
#define __ORDER_LITTLE_ENDIAN__         (2)
#endif /* __ORDER_LITTLE_ENDIAN__ */
 
#ifndef __ORDER_PDP_ENDIAN__
#define __ORDER_PDP_ENDIAN__            (3)
#endif /* __ORDER_PDP_ENDIAN__ */
 
#ifndef __BYTE_ORDER__
 
#if __LITTLE_ENDIAN__ == 1
#define __BYTE_ORDER__                  __ORDER_LITTLE_ENDIAN__
#else
#define __BYTE_ORDER__                  __ORDER_BIG_ENDIAN__
#endif /* __LITTLE_ENDIAN__ == 1 */
 
#endif /* __BYTE_ORDER__ */
 
 
#if defined(__cplusplus) && (__cplusplus >= 201103L)
#define BUILD_ASSERT(EXPR, MSG...)  static_assert(EXPR, "" MSG)
#elif defined(__ICCARM__)
#define BUILD_ASSERT(EXPR, MSG...) _Static_assert(EXPR, "" MSG)
#endif
 
/* Zephyr makes use of __ATOMIC_SEQ_CST */
#ifdef __STDC_NO_ATOMICS__
#ifndef __ATOMIC_SEQ_CST
#define __MEMORY_ORDER_SEQ_CST__ 5
#endif
#endif
#ifndef __ATOMIC_SEQ_CST
#define __ATOMIC_SEQ_CST __MEMORY_ORDER_SEQ_CST__
#endif
 
/* By default, restrict is recognized in Standard C
 * __restrict is always recognized
 */
#define ZRESTRICT __restrict
 
#include <zephyr/toolchain/common.h>
#include <stdbool.h>
 
#define ALIAS_OF(of) __attribute__((alias(#of)))
 
#define FUNC_ALIAS(real_func, new_alias, return_type) \
        return_type new_alias() ALIAS_OF(real_func)
 
#define CODE_UNREACHABLE __builtin_unreachable()
#define FUNC_NORETURN    __attribute__((__noreturn__))
 
#define _NODATA_SECTION(segment)  __attribute__((section(#segment)))
 
/* Unaligned access */
#define UNALIGNED_GET(p)                                                \
__extension__ ({                                                        \
        struct  __attribute__((__packed__)) {                           \
                __typeof__(*(p)) __v;                                   \
        } *__p = (__typeof__(__p)) (p);                                 \
        __p->__v;                                                       \
})
 
#define UNALIGNED_PUT(v, p)                                             \
do {                                                                    \
        struct __attribute__((__packed__)) {                            \
                __typeof__(*p) __v;                                     \
        } *__p = (__typeof__(__p)) (p);                                 \
        __p->__v = (v);                                               \
} while (false)
 
 
/* Double indirection to ensure section names are expanded before
 * stringification
 */
#define __GENERIC_SECTION(segment) __attribute__((section(STRINGIFY(segment))))
#define Z_GENERIC_SECTION(segment) __GENERIC_SECTION(segment)
 
#define __GENERIC_DOT_SECTION(segment) \
        __attribute__((section("." STRINGIFY(segment))))
#define Z_GENERIC_DOT_SECTION(segment) __GENERIC_DOT_SECTION(segment)
 
#define ___in_section(a, b, c) \
        __attribute__((section("." Z_STRINGIFY(a)                       \
                                "." Z_STRINGIFY(b)                      \
                                "." Z_STRINGIFY(c))))
#define __in_section(a, b, c) ___in_section(a, b, c)
 
#define __in_section_unique(seg) ___in_section(seg, __FILE__, __COUNTER__)
 
#define __in_section_unique_named(seg, name) \
        ___in_section(seg, __FILE__, name)
 
/* When using XIP, using '__ramfunc' places a function into RAM instead
 * of FLASH. Make sure '__ramfunc' is defined only when
 * CONFIG_ARCH_HAS_RAMFUNC_SUPPORT is defined, so that the compiler can
 * report an error if '__ramfunc' is used but the architecture does not
 * support it.
 */
#if !defined(CONFIG_XIP)
#define __ramfunc
#elif defined(CONFIG_ARCH_HAS_RAMFUNC_SUPPORT)
/* Use this instead of the IAR keyword __ramfunc to make sure it
 * ends up in the correct section.
 */
#define __ramfunc __attribute__((noinline, section(".ramfunc")))
#endif /* !CONFIG_XIP */
 
#ifndef __fallthrough
/* TG-WG: ICCARM does not support __fallthrough */
#define __fallthrough  [[fallthrough]]
#endif
 
#ifndef __packed
#define __packed        __attribute__((__packed__))
#endif
 
#ifndef __aligned
#define __aligned(x)    __attribute__((__aligned__(x)))
#endif
 
#ifndef __noinline
#define __noinline        __attribute__((noinline))
#endif
 
#if defined(__cplusplus)
#define __alignof(x) alignof(x)
#else
#define __alignof(x) _Alignof(x)
#endif
 
#define __may_alias     __attribute__((__may_alias__))
 
#ifndef __printf_like
/*
 * The Zephyr stdint convention enforces int32_t = int, int64_t = long long,
 * and intptr_t = long so that short string format length modifiers can be
 * used universally across ILP32 and LP64 architectures. Without that it
 * is possible for ILP32 toolchains to have int32_t = long and intptr_t = int
 * clashing with the Zephyr convention and generating pointless warnings
 * as they're still the same size. Inhibit the format argument type
 * validation in that case and let the other configs do it.
 */
#define __printf_like(f, a)
#endif
 
#define __used          __attribute__((__used__))
#define __unused        __attribute__((__unused__))
#define __maybe_unused  __attribute__((__unused__))
 
#ifndef __deprecated
#define __deprecated    __attribute__((deprecated))
#endif
 
#define FUNC_NO_STACK_PROTECTOR _Pragma("no_stack_protect")
 
#ifndef __attribute_const__
#if __VER__ > 0x09000000
#define __attribute_const__ __attribute__((const))
#else
#define __attribute_const__
#endif
#endif
 
#ifndef __must_check
/* #warning "The attribute __warn_unused_result is not supported in ICCARM". */
#define __must_check
/* #define __must_check __attribute__((warn_unused_result)) */
#endif
 
#define __PRAGMA(...) _Pragma(#__VA_ARGS__)
#define ARG_UNUSED(x) (void)(x)
 
#define likely(x)   (__builtin_expect((bool)!!(x), true) != 0L)
#define unlikely(x) (__builtin_expect((bool)!!(x), false) != 0L)
#define POPCOUNT(x) __builtin_popcount(x)
 
#ifndef __no_optimization
#define __no_optimization __PRAGMA(optimize = none)
#endif
 
#ifndef __attribute_nonnull
 #define __attribute_nonnull(...) __attribute__((nonnull(__VA_ARGS__)))
#endif
 
/* __weak is an ICCARM built-in, but it doesn't work in all positions */
/* the Zephyr uses it so we replace it with an attribute((weak))      */
#define __weak __attribute__((__weak__))
 
/* Builtins */
 
#include <intrinsics.h>
 
/*
 * Be *very* careful with these. You cannot filter out __DEPRECATED_MACRO with
 * -wno-deprecated, which has implications for -Werror.
 */
 
 
/*
 * Expands to nothing and generates a warning. Used like
 *
 *   #define FOO __WARN("Please use BAR instead") ...
 *
 * The warning points to the location where the macro is expanded.
 */
#define __WARN(s) __PRAGMA(message = #s)
#define __WARN1(s) __PRAGMA(message = #s)
 
/* Generic message */
#ifndef __DEPRECATED_MACRO
#define __DEPRECATED_MACRO __WARN("Macro is deprecated")
#endif
 
/* These macros allow having ARM asm functions callable from thumb */
 
#if defined(_ASMLANGUAGE)
 
#if defined(CONFIG_ASSEMBLER_ISA_THUMB2)
#define FUNC_CODE() .code 32
#define FUNC_INSTR(a)
/* '.syntax unified' is a gcc-ism used in thumb-2 asm files */
#define _ASM_FILE_PROLOGUE .text; .syntax unified; .thumb
#else
#define FUNC_CODE()
#define FUNC_INSTR(a)
#define _ASM_FILE_PROLOGUE .text; .code 32
#endif /* CONFIG_ASSEMBLER_ISA_THUMB2 */
 
/*
 * These macros are used to declare assembly language symbols that need
 * to be typed properly(func or data) to be visible to the OMF tool.
 * So that the build tool could mark them as an entry point to be linked
 * correctly.  This is an elfism. Use #if 0 for a.out.
 */
 
/* This is not implemented yet for IAR */
#define GTEXT(sym)
#define GDATA(sym)
#define WTEXT(sym)
#define WDATA(sym)
 
#define SECTION_VAR(sect, sym)
#define SECTION_FUNC(sect, sym)
#define SECTION_SUBSEC_FUNC(sect, subsec, sym)
 
#endif /* _ASMLANGUAGE */
 
 
/*
 * These macros generate absolute symbols for IAR
 */
 
/* create an extern reference to the absolute symbol */
 
#define GEN_OFFSET_EXTERN(name) extern const char name[]
 
#define GEN_ABS_SYM_BEGIN(name) \
        EXTERN_C void name(void); \
        void name(void)         \
        {
 
#define GEN_ABS_SYM_END }
 
/*
 * Note that GEN_ABSOLUTE_SYM(), depending on the architecture
 * and toolchain, may restrict the range of values permitted
 * for assignment to the named symbol.
 */
#define GEN_ABSOLUTE_SYM(name, value) \
        __PRAGMA(public_equ = #name, (unsigned int)value)
 
/*
 * GEN_ABSOLUTE_SYM_KCONFIG() is outputted by the build system
 * to generate named symbol/value pairs for kconfigs.
 */
#define GEN_ABSOLUTE_SYM_KCONFIG(name, value) \
        __PRAGMA(public_equ = #name, (unsigned int)value)
 
#define compiler_barrier() do { \
        __asm volatile("" ::: "memory"); \
} while (false)
 
#define Z_MAX(a, b) ({ \
                /* random suffix to avoid naming conflict */ \
                __typeof__(a) _value_a_ = (a); \
                __typeof__(b) _value_b_ = (b); \
                _value_a_ > _value_b_ ? _value_a_ : _value_b_; \
        })
 
#define Z_MIN(a, b) ({ \
                /* random suffix to avoid naming conflict */ \
                __typeof__(a) _value_a_ = (a); \
                __typeof__(b) _value_b_ = (b); \
                _value_a_ < _value_b_ ? _value_a_ : _value_b_; \
        })
 
#define Z_CLAMP(val, low, high) ({                                             \
                /* random suffix to avoid naming conflict */                   \
                __typeof__(val) _value_val_ = (val);                           \
                __typeof__(low) _value_low_ = (low);                           \
                __typeof__(high) _value_high_ = (high);                        \
                (_value_val_ < _value_low_)  ? _value_low_ :                   \
                (_value_val_ > _value_high_) ? _value_high_ :                  \
                                               _value_val_;                    \
        })
 
#define Z_POW2_CEIL(x) \
        ((x) <= 2UL ? (x) : (1UL << (8 * sizeof(long) - __builtin_clzl((x) - 1))))
 
#define Z_IS_POW2(x) (((x) != 0) && (((x) & ((x)-1)) == 0))
 
#ifndef __INT8_C
#define __INT8_C(x)     x
#endif
 
#ifndef INT8_C
#define INT8_C(x)       __INT8_C(x)
#endif
 
#ifndef __UINT8_C
#define __UINT8_C(x)    x ## U
#endif
 
#ifndef UINT8_C
#define UINT8_C(x)      __UINT8_C(x)
#endif
 
#ifndef __INT16_C
#define __INT16_C(x)    x
#endif
 
#ifndef INT16_C
#define INT16_C(x)      __INT16_C(x)
#endif
 
#ifndef __UINT16_C
#define __UINT16_C(x)   x ## U
#endif
 
#ifndef UINT16_C
#define UINT16_C(x)     __UINT16_C(x)
#endif
 
#ifndef __INT32_C
#define __INT32_C(x)    x
#endif
 
#ifndef INT32_C
#define INT32_C(x)      __INT32_C(x)
#endif
 
#ifndef __UINT32_C
#define __UINT32_C(x)   x ## U
#endif
 
#ifndef UINT32_C
#define UINT32_C(x)     __UINT32_C(x)
#endif
 
#ifndef __INT64_C
#define __INT64_C(x)    x ## LL
#endif
 
#ifndef INT64_C
#define INT64_C(x)      __INT64_C(x)
#endif
 
#ifndef __UINT64_C
#define __UINT64_C(x)   x ## ULL
#endif
 
#ifndef UINT64_C
#define UINT64_C(x)     __UINT64_C(x)
#endif
 
/* Convenience macros */
#undef _GLUE_B
#undef _GLUE
#define _GLUE_B(x, y) x##y
#define _GLUE(x, y)   _GLUE_B(x, y)
 
#ifndef INTMAX_C
#define INTMAX_C(x)  _GLUE(x, __INTMAX_C_SUFFIX__)
#endif
 
#ifndef UINTMAX_C
#define UINTMAX_C(x) _GLUE(x, __UINTMAX_C_SUFFIX__)
#endif
 
#endif /* !_LINKER */
#endif /* ZEPHYR_INCLUDE_TOOLCHAIN_ICCARM_H_ */