return tmp.f;
}
+/**
+ * Convert a floating point value to an unsigned fixed point value.
+ *
+ * \param frac_bits The number of bits used to store the fractional part.
+ */
+static INLINE uint32_t
+U_FIXED(float value, uint32_t frac_bits)
+{
+ value *= (1 << frac_bits);
+ return value < 0.0f ? 0 : (uint32_t) value;
+}
+
+/**
+ * Convert a floating point value to an signed fixed point value.
+ *
+ * \param frac_bits The number of bits used to store the fractional part.
+ */
+static INLINE int32_t
+S_FIXED(float value, uint32_t frac_bits)
+{
+ return (int32_t) (value * (1 << frac_bits));
+}
/*@}*/
return MAX2(1, value >> levels);
}
+/**
+ * Return true if the given value is a power of two.
+ *
+ * Note that this considers 0 a power of two.
+ */
+static inline bool
+is_power_of_two(unsigned value)
+{
+ return (value & (value - 1)) == 0;
+}
+
/**
* Align a value up to an alignment value
*
*/
#define ALIGN(value, alignment) (((value) + (alignment) - 1) & ~((alignment) - 1))
+/**
+ * Align a value down to an alignment value
+ *
+ * If \c value is not already aligned to the requested alignment value, it
+ * will be rounded down.
+ *
+ * \param value Value to be rounded
+ * \param alignment Alignment value to be used. This must be a power of two.
+ *
+ * \sa ALIGN()
+ */
+#define ROUND_DOWN_TO(value, alignment) ((value) & ~(alignment - 1))
/** Cross product of two 3-element vectors */
/* Compute the size of an array */
#define ARRAY_SIZE(x) (sizeof(x) / sizeof(x[0]))
+/* Stringify */
+#define STRINGIFY(x) #x
#endif