/*
* Mesa 3-D graphics library
- * Version: 7.5
*
* Copyright (C) 1999-2008 Brian Paul All Rights Reserved.
*
* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS
* OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
* FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL
- * BRIAN PAUL BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN
- * AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN
- * CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
+ * THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR
+ * OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE,
+ * ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR
+ * OTHER DEALINGS IN THE SOFTWARE.
*/
* these casts generate warnings.
* The following union typedef is used to solve that.
*/
-typedef union { GLfloat f; GLint i; } fi_type;
+typedef union { GLfloat f; GLint i; GLuint u; } fi_type;
#define DEG2RAD (M_PI/180.0)
-/***
- *** SQRTF: single-precision square root
- ***/
-#define SQRTF(X) (float) sqrt((float) (X))
-
-
-/***
- *** INV_SQRTF: single-precision inverse square root
- ***/
-#define INV_SQRTF(X) (1.0F / SQRTF(X))
-
-
/**
* \name Work-arounds for platforms that lack C99 math functions
*/
#define atanhf(f) ((float) atanh(f))
#endif
-#if defined(_MSC_VER)
+#if defined(_MSC_VER) && (_MSC_VER < 1800) /* Not req'd on VS2013 and above */
static inline float truncf(float x) { return x < 0.0f ? ceilf(x) : floorf(x); }
static inline float exp2f(float x) { return powf(2.0f, x); }
static inline float log2f(float x) { return logf(x) * 1.442695041f; }
static inline float atanhf(float x) { return (logf(1.0f + x) - logf(1.0f - x)) / 2.0f; }
static inline int isblank(int ch) { return ch == ' ' || ch == '\t'; }
#define strtoll(p, e, b) _strtoi64(p, e, b)
+#define strcasecmp(s1, s2) _stricmp(s1, s2)
#endif
/*@}*/
+/*
+ * signbit() is a macro on Linux. Not available on Windows.
+ */
+#ifndef signbit
+#define signbit(x) ((x) < 0.0f)
+#endif
+
+
+/** single-precision inverse square root */
+static inline float
+INV_SQRTF(float x)
+{
+ /* XXX we could try Quake's fast inverse square root function here */
+ return 1.0F / sqrtf(x);
+}
+
+
/***
*** LOG2: Log base 2 of float
***/
#define IS_INF_OR_NAN(x) (!isfinite(x))
#elif defined(finite)
#define IS_INF_OR_NAN(x) (!finite(x))
-#elif defined(__VMS)
-#define IS_INF_OR_NAN(x) (!finite(x))
#elif defined(__STDC_VERSION__) && __STDC_VERSION__ >= 199901L
#define IS_INF_OR_NAN(x) (!isfinite(x))
#else
#ifndef FFS_DEFINED
#define FFS_DEFINED 1
#ifdef __GNUC__
-
-#if defined(__MINGW32__) || defined(__CYGWIN__) || defined(ANDROID) || defined(__APPLE__)
#define ffs __builtin_ffs
#define ffsll __builtin_ffsll
-#endif
-
#else
-
extern int ffs(int i);
extern int ffsll(long long int i);
-
#endif /*__ GNUC__ */
#endif /* FFS_DEFINED */
_mesa_bitcount_64(uint64_t n);
#endif
+/**
+ * Find the last (most significant) bit set in a word.
+ *
+ * Essentially ffs() in the reverse direction.
+ */
+static inline unsigned int
+_mesa_fls(unsigned int n)
+{
+#if defined(__GNUC__) && ((__GNUC__ * 100 + __GNUC_MINOR__) >= 304)
+ return n == 0 ? 0 : 32 - __builtin_clz(n);
+#else
+ unsigned int v = 1;
+
+ if (n == 0)
+ return 0;
+
+ while (n >>= 1)
+ v++;
+
+ return v;
+#endif
+}
+
+extern int
+_mesa_round_to_even(float val);
extern GLhalfARB
_mesa_float_to_half(float f);