mirror of
https://github.com/yuzu-emu/unicorn.git
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285 lines
8 KiB
C
285 lines
8 KiB
C
/* compiler.h: macros to abstract away compiler specifics
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*
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* This work is licensed under the terms of the GNU GPL, version 2 or later.
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* See the COPYING file in the top-level directory.
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*/
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#ifndef COMPILER_H
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#define COMPILER_H
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#include "config-host.h"
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#include "unicorn/platform.h"
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#ifndef __has_attribute
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#define __has_attribute(x) 0 /* compatibility with older GCC */
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#endif
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#ifndef __has_builtin // Optional of course.
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#define __has_builtin(x) 0 // Compatibility with non-clang compilers.
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#endif
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/*
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* If __attribute__((error)) is present, use it to produce an error at
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* compile time. Otherwise, one must wait for the linker to diagnose
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* the missing symbol.
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*/
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#if __has_attribute(error)
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# define QEMU_ERROR(X) __attribute__((error(X)))
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#else
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# define QEMU_ERROR(X)
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#endif
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/*
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* The nonstring variable attribute specifies that an object or member
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* declaration with type array of char or pointer to char is intended
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* to store character arrays that do not necessarily contain a terminating
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* NUL character. This is useful in detecting uses of such arrays or pointers
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* with functions that expect NUL-terminated strings, and to avoid warnings
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* when such an array or pointer is used as an argument to a bounded string
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* manipulation function such as strncpy.
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*/
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#if __has_attribute(nonstring)
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# define QEMU_NONSTRING __attribute__((nonstring))
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#else
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# define QEMU_NONSTRING
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#endif
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#ifdef _MSC_VER
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// MSVC support
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#define inline __inline
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#define __func__ __FUNCTION__
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#include <intrin.h>
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#include <math.h>
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#include <float.h>
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#if _MSC_VER < MSC_VER_VS2013
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#define isinf(x) (!_finite(x))
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#if defined(_WIN64)
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#define isnan _isnanf
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#else
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#define isnan _isnan
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#endif
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#endif
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#ifndef likely
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#define likely(x) (x)
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#endif
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#ifndef unlikely
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#define unlikely(x) (x)
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#endif
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#ifndef glue
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#define xglue(x, y) x ## y
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#define glue(x, y) xglue(x, y)
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#define stringify(s) tostring(s)
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#define tostring(s) #s
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#endif
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#define container_of(ptr, type, member) ((type *)((char *)(ptr) -offsetof(type,member)))
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#define sizeof_field(type, field) sizeof(((type *)0)->field)
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static double rint( double x )
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{
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return floor(x < 0 ? x - 0.5 : x + 0.5);
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}
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union MSVC_FLOAT_HACK
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{
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unsigned char Bytes[4];
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float Value;
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};
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#ifndef NAN
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static union MSVC_FLOAT_HACK __NAN = {{0x00, 0x00, 0xC0, 0x7F}};
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#define NAN (__NAN.Value)
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#endif
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#define QEMU_DIV0 __pragma(warning(suppress:2124)) // divide by zero error
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#define QEMU_GNUC_PREREQ(maj, min) 0
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#define QEMU_NORETURN __declspec(noreturn)
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#define QEMU_UNUSED_VAR __pragma(warning(suppress:4100)) // unused variables only
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#define QEMU_UNUSED_FUNC
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#define QEMU_WARN_UNUSED_RESULT
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#define QEMU_PACK( __Declaration__ ) __pragma( pack(push, 1) ) __Declaration__ __pragma( pack(pop) )
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#define QEMU_ALIGNED(A, B) __declspec(align(A)) B
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// Unicorn: Initially added to abstract away GCC's flatten attribute in softfloat.c
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#define QEMU_FLATTEN
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// Unicorn: Addition for thread-local variables
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#define QEMU_THREAD_LOCAL_VAR __declspec(thread)
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#define cat(x,y) x ## y
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#define cat2(x,y) cat(x,y)
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#define QEMU_BUILD_BUG_ON_STRUCT(x) \
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struct { \
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int:(x) ? -1 : 1; \
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}
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/* QEMU_BUILD_BUG_MSG() emits the message given if _Static_assert is
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* supported; otherwise, it will be omitted from the compiler error
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* message (but as it remains present in the source code, it can still
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* be useful when debugging). */
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#if defined(CONFIG_STATIC_ASSERT)
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#define QEMU_BUILD_BUG_MSG(x, msg) _Static_assert(!(x), msg)
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#elif defined(__COUNTER__)
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#define QEMU_BUILD_BUG_MSG(x, msg) typedef QEMU_BUILD_BUG_ON_STRUCT(x) \
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glue(qemu_build_bug_on__, __COUNTER__) QEMU_UNUSED_VAR
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#else
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#define QEMU_BUILD_BUG_MSG(x, msg)
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#endif
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#define QEMU_BUILD_BUG_ON(x) QEMU_BUILD_BUG_MSG(x, "not expecting: " #x)
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#define QEMU_BUILD_BUG_ON_ZERO(x) (sizeof(QEMU_BUILD_BUG_ON_STRUCT(x)) - \
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sizeof(QEMU_BUILD_BUG_ON_STRUCT(x)))
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#define GCC_FMT_ATTR(n, m)
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#else
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#ifndef NAN
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#define NAN (0.0 / 0.0)
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#endif
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#if defined __clang_analyzer__ || defined __COVERITY__
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#define QEMU_STATIC_ANALYSIS 1
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#endif
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/*----------------------------------------------------------------------------
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| The macro QEMU_GNUC_PREREQ tests for minimum version of the GNU C compiler.
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| The code is a copy of SOFTFLOAT_GNUC_PREREQ, see softfloat-macros.h.
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*----------------------------------------------------------------------------*/
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#if defined(__GNUC__) && defined(__GNUC_MINOR__)
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# define QEMU_GNUC_PREREQ(maj, min) \
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((__GNUC__ << 16) + __GNUC_MINOR__ >= ((maj) << 16) + (min))
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#else
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# define QEMU_GNUC_PREREQ(maj, min) 0
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#endif
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#define QEMU_NORETURN __attribute__ ((__noreturn__))
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#define QEMU_UNUSED_VAR __attribute__((unused))
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#define QEMU_UNUSED_FUNC __attribute__((unused))
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#define QEMU_WARN_UNUSED_RESULT __attribute__((warn_unused_result))
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#if defined(_WIN32)
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# define QEMU_PACK( __Declaration__ ) __Declaration__ __attribute__((gcc_struct, packed))
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#else
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# define QEMU_PACK( __Declaration__ ) __Declaration__ __attribute__((packed))
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#endif
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#define QEMU_ALIGNED(A, B) B __attribute__((aligned(A)))
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// Unicorn: Initially added to abstract away GCC's flatten attribute in softfloat.c
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#define QEMU_FLATTEN __attribute__((flatten))
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// Unicorn: Addition for thread-local variables
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#define QEMU_THREAD_LOCAL_VAR __thread
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#ifndef glue
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#define xglue(x, y) x ## y
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#define glue(x, y) xglue(x, y)
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#define stringify(s) tostring(s)
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#define tostring(s) #s
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#endif
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#ifndef likely
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#if __GNUC__ < 3
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#define __builtin_expect(x, n) (x)
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#endif
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#define likely(x) __builtin_expect(!!(x), 1)
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#define unlikely(x) __builtin_expect(!!(x), 0)
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#endif
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#ifndef container_of
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#ifndef _MSC_VER
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#define container_of(ptr, type, member) ({ \
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const typeof(((type *) 0)->member) *__mptr = (ptr); \
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(type *) ((char *) __mptr - offsetof(type, member));})
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#else
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#define container_of(ptr, type, member) ((type *)((char *)(ptr) -offsetof(type,member)))
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#endif
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#endif
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#define sizeof_field(type, field) sizeof(((type *)0)->field)
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/* Convert from a base type to a parent type, with compile time checking. */
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#ifdef __GNUC__
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#define DO_UPCAST(type, field, dev) ( __extension__ ( { \
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char QEMU_UNUSED_VAR offset_must_be_zero[ \
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-offsetof(type, field)]; \
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container_of(dev, type, field);}))
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#else
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#define DO_UPCAST(type, field, dev) container_of(dev, type, field)
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#endif
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#define typeof_field(type, field) typeof(((type *)0)->field)
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#define type_check(t1,t2) ((t1*)0 - (t2*)0)
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#ifndef always_inline
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#if !((__GNUC__ < 3) || defined(__APPLE__))
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#ifdef __OPTIMIZE__
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#undef inline
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#define inline __attribute__ (( always_inline )) __inline__
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#endif
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#endif
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#else
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#undef inline
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#define inline always_inline
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#endif
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#define QEMU_BUILD_BUG_ON_STRUCT(x) \
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struct { \
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int:(x) ? -1 : 1; \
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}
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/* QEMU_BUILD_BUG_MSG() emits the message given if _Static_assert is
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* supported; otherwise, it will be omitted from the compiler error
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* message (but as it remains present in the source code, it can still
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* be useful when debugging). */
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#if defined(CONFIG_STATIC_ASSERT)
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#define QEMU_BUILD_BUG_MSG(x, msg) _Static_assert(!(x), msg)
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#elif defined(__COUNTER__)
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#define QEMU_BUILD_BUG_MSG(x, msg) typedef QEMU_BUILD_BUG_ON_STRUCT(x) \
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glue(qemu_build_bug_on__, __COUNTER__) QEMU_UNUSED_VAR
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#else
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#define QEMU_BUILD_BUG_MSG(x, msg)
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#endif
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#define QEMU_BUILD_BUG_ON(x) QEMU_BUILD_BUG_MSG(x, "not expecting: " #x)
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#define QEMU_BUILD_BUG_ON_ZERO(x) (sizeof(QEMU_BUILD_BUG_ON_STRUCT(x)) - \
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sizeof(QEMU_BUILD_BUG_ON_STRUCT(x)))
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#if defined __GNUC__
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# if !QEMU_GNUC_PREREQ(4, 4)
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/* gcc versions before 4.4.x don't support gnu_printf, so use printf. */
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# define GCC_FMT_ATTR(n, m) __attribute__((format(printf, n, m)))
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# else
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/* Use gnu_printf when supported (qemu uses standard format strings). */
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# define GCC_FMT_ATTR(n, m) __attribute__((format(gnu_printf, n, m)))
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# if defined(_WIN32)
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/* Map __printf__ to __gnu_printf__ because we want standard format strings
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* even when MinGW or GLib include files use __printf__. */
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# define __printf__ __gnu_printf__
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# endif
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# endif
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#else
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#define GCC_FMT_ATTR(n, m)
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#endif
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#endif // _MSC_VER
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#endif /* COMPILER_H */
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