#ifndef UTIL_MACROS_H
#define UTIL_MACROS_H
-#include <math.h>
+#include <assert.h>
+
+#include "c99_compat.h"
/* Compute the size of an array */
#ifndef ARRAY_SIZE
assert(!str); \
__builtin_unreachable(); \
} while (0)
-#elif _MSC_VER >= 1200
+#elif defined (_MSC_VER)
#define unreachable(str) \
do { \
assert(!str); \
__assume(0); \
} while (0)
-#endif
-
-#ifndef unreachable
+#else
#define unreachable(str) assert(!str)
#endif
#define assume(expr) ((expr) ? ((void) 0) \
: (assert(!"assumption failed"), \
__builtin_unreachable()))
-#elif _MSC_VER >= 1200
+#elif defined (_MSC_VER)
#define assume(expr) __assume(expr)
#else
#define assume(expr) assert(expr)
#endif
+/* Attribute const is used for functions that have no effects other than their
+ * return value, and only rely on the argument values to compute the return
+ * value. As a result, calls to it can be CSEed. Note that using memory
+ * pointed to by the arguments is not allowed for const functions.
+ */
+#ifdef HAVE_FUNC_ATTRIBUTE_CONST
+#define ATTRIBUTE_CONST __attribute__((__const__))
+#else
+#define ATTRIBUTE_CONST
+#endif
+
#ifdef HAVE_FUNC_ATTRIBUTE_FLATTEN
#define FLATTEN __attribute__((__flatten__))
#else
#define PACKED
#endif
+/* Attribute pure is used for functions that have no effects other than their
+ * return value. As a result, calls to it can be dead code eliminated.
+ */
+#ifdef HAVE_FUNC_ATTRIBUTE_PURE
+#define ATTRIBUTE_PURE __attribute__((__pure__))
+#else
+#define ATTRIBUTE_PURE
+#endif
+
+#ifdef HAVE_FUNC_ATTRIBUTE_RETURNS_NONNULL
+#define ATTRIBUTE_RETURNS_NONNULL __attribute__((__returns_nonnull__))
+#else
+#define ATTRIBUTE_RETURNS_NONNULL
+#endif
+
#ifdef __cplusplus
/**
* Macro function that evaluates to true if T is a trivially
* performs no action and all member variables and base classes are
* trivially destructible themselves.
*/
-# if defined(__GNUC__)
+# if (defined(__clang__) && defined(__has_feature))
+# if __has_feature(has_trivial_destructor)
+# define HAS_TRIVIAL_DESTRUCTOR(T) __has_trivial_destructor(T)
+# endif
+# elif defined(__GNUC__)
# if ((__GNUC__ > 4) || ((__GNUC__ == 4) && (__GNUC_MINOR__ >= 3)))
# define HAS_TRIVIAL_DESTRUCTOR(T) __has_trivial_destructor(T)
# endif
-# elif (defined(__clang__) && defined(__has_feature))
-# if __has_feature(has_trivial_destructor)
+# elif defined(_MSC_VER) && !defined(__INTEL_COMPILER)
+# if _MSC_VER >= 1800
# define HAS_TRIVIAL_DESTRUCTOR(T) __has_trivial_destructor(T)
# endif
# endif
# endif
#endif
-#if defined(fpclassify)
-/* ISO C99 says that fpclassify is a macro. Assume that any implementation
- * of fpclassify, whether it's in a C99 compiler or not, will be a macro.
- */
-#elif defined(_MSC_VER)
-/* Not required on VS2013 and above. */
-/* Oddly, the fpclassify() function doesn't exist in such a form
- * on MSVC. This is an implementation using slightly different
- * lower-level Windows functions.
+/**
+ * PUBLIC/USED macros
+ *
+ * If we build the library with gcc's -fvisibility=hidden flag, we'll
+ * use the PUBLIC macro to mark functions that are to be exported.
+ *
+ * We also need to define a USED attribute, so the optimizer doesn't
+ * inline a static function that we later use in an alias. - ajax
*/
-#include <float.h>
-
-static inline enum {FP_NAN, FP_INFINITE, FP_ZERO, FP_SUBNORMAL, FP_NORMAL}
-fpclassify(double x)
-{
- switch(_fpclass(x)) {
- case _FPCLASS_SNAN: /* signaling NaN */
- case _FPCLASS_QNAN: /* quiet NaN */
- return FP_NAN;
- case _FPCLASS_NINF: /* negative infinity */
- case _FPCLASS_PINF: /* positive infinity */
- return FP_INFINITE;
- case _FPCLASS_NN: /* negative normal */
- case _FPCLASS_PN: /* positive normal */
- return FP_NORMAL;
- case _FPCLASS_ND: /* negative denormalized */
- case _FPCLASS_PD: /* positive denormalized */
- return FP_SUBNORMAL;
- case _FPCLASS_NZ: /* negative zero */
- case _FPCLASS_PZ: /* positive zero */
- return FP_ZERO;
- default:
- /* Should never get here; but if we do, this will guarantee
- * that the pattern is not treated like a number.
- */
- return FP_NAN;
- }
-}
+#ifndef PUBLIC
+# if defined(__GNUC__)
+# define PUBLIC __attribute__((visibility("default")))
+# define USED __attribute__((used))
+# elif defined(_MSC_VER)
+# define PUBLIC __declspec(dllexport)
+# define USED
+# else
+# define PUBLIC
+# define USED
+# endif
+#endif
+#ifdef HAVE_FUNC_ATTRIBUTE_UNUSED
+#define UNUSED __attribute__((unused))
#else
+#define UNUSED
+#endif
-enum {FP_NAN, FP_INFINITE, FP_ZERO, FP_SUBNORMAL, FP_NORMAL}
-fpclassify(double x)
-{
- /* XXX do something better someday */
- return FP_NORMAL;
-}
+#define MAYBE_UNUSED UNUSED
+#ifdef HAVE_FUNC_ATTRIBUTE_WARN_UNUSED_RESULT
+#define MUST_CHECK __attribute__((warn_unused_result))
+#else
+#define MUST_CHECK
#endif
+#if defined(__GNUC__)
+#define ATTRIBUTE_NOINLINE __attribute__((noinline))
+#else
+#define ATTRIBUTE_NOINLINE
+#endif
+
+/** Compute ceiling of integer quotient of A divided by B. */
+#define DIV_ROUND_UP( A, B ) ( (A) % (B) == 0 ? (A)/(B) : (A)/(B)+1 )
+
+/** Clamp X to [MIN,MAX] */
+#define CLAMP( X, MIN, MAX ) ( (X)<(MIN) ? (MIN) : ((X)>(MAX) ? (MAX) : (X)) )
+
+/** Minimum of two values: */
+#define MIN2( A, B ) ( (A)<(B) ? (A) : (B) )
+
+/** Maximum of two values: */
+#define MAX2( A, B ) ( (A)>(B) ? (A) : (B) )
+
+/** Minimum and maximum of three values: */
+#define MIN3( A, B, C ) ((A) < (B) ? MIN2(A, C) : MIN2(B, C))
+#define MAX3( A, B, C ) ((A) > (B) ? MAX2(A, C) : MAX2(B, C))
+
#endif /* UTIL_MACROS_H */
projects / mesa.git / blobdiff