-/***
- *** IROUND: return (as an integer) float rounded to nearest integer
- ***/
-#if defined(USE_X86_ASM) && defined(__GNUC__) && defined(__i386__)
-static INLINE int iround(float f)
+/**
+ * Convert float to int by rounding to nearest integer, away from zero.
+ */
+static inline int IROUND(float f)
+{
+ return (int) ((f >= 0.0F) ? (f + 0.5F) : (f - 0.5F));
+}
+
+
+/**
+ * Convert float to int64 by rounding to nearest integer.
+ */
+static inline GLint64 IROUND64(float f)
+{
+ return (GLint64) ((f >= 0.0F) ? (f + 0.5F) : (f - 0.5F));
+}
+
+
+/**
+ * Convert positive float to int by rounding to nearest integer.
+ */
+static inline int IROUND_POS(float f)
+{
+ assert(f >= 0.0F);
+ return (int) (f + 0.5F);
+}
+
+#ifdef __x86_64__
+# include <xmmintrin.h>
+#endif
+
+/**
+ * Convert float to int using a fast method. The rounding mode may vary.
+ */
+static inline int F_TO_I(float f)