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authorKeith Whitwell <keith@tungstengraphics.com>2007-08-13 17:02:27 +0100
committerKeith Whitwell <keith@tungstengraphics.com>2007-08-14 15:57:30 +0100
commit70af238b494ed1b6da4841c2065c33ee0f0f37c9 (patch)
treeeef1943724488fb620802718c21cfc6ae7c48d13 /src/mesa/pipe/p_util.h
parentd16b4bc32a731cb6ae320e8c187af3bc751d4138 (diff)
Continue reducing dependencies on core mesa include files.
Mainly down to the support for legacy TNL processing now.
Diffstat (limited to 'src/mesa/pipe/p_util.h')
-rw-r--r--src/mesa/pipe/p_util.h83
1 files changed, 71 insertions, 12 deletions
diff --git a/src/mesa/pipe/p_util.h b/src/mesa/pipe/p_util.h
index 979befb194..50d57a2ed0 100644
--- a/src/mesa/pipe/p_util.h
+++ b/src/mesa/pipe/p_util.h
@@ -28,25 +28,14 @@
#define P_UTIL_H
#include "p_compiler.h"
+#include <math.h>
#define CALLOC_STRUCT(T) (struct T *) calloc(1, sizeof(struct T))
-
-
-/** Clamp X to [MIN,MAX] */
#define CLAMP( X, MIN, MAX ) ( (X)<(MIN) ? (MIN) : ((X)>(MAX) ? (MAX) : (X)) )
-
-/** Assign X to CLAMP(X, MIN, MAX) */
-#define CLAMP_SELF(x, mn, mx) \
- ( (x)<(mn) ? ((x) = (mn)) : ((x)>(mx) ? ((x)=(mx)) : (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) )
-
#define Elements(x) sizeof(x)/sizeof(*(x))
union fi {
@@ -114,4 +103,74 @@ static INLINE unsigned pack_ui32_float4( float a,
float_to_ubyte(d) );
}
+#define COPY_4V( DST, SRC ) \
+do { \
+ (DST)[0] = (SRC)[0]; \
+ (DST)[1] = (SRC)[1]; \
+ (DST)[2] = (SRC)[2]; \
+ (DST)[3] = (SRC)[3]; \
+} while (0)
+
+
+static INLINE int ifloor(float f)
+{
+ int ai, bi;
+ double af, bf;
+ union fi u;
+
+ af = (3 << 22) + 0.5 + (double)f;
+ bf = (3 << 22) + 0.5 - (double)f;
+ u.f = (float) af; ai = u.i;
+ u.f = (float) bf; bi = u.i;
+ return (ai - bi) >> 1;
+}
+
+
+#if defined(__GNUC__) && defined(__i386__)
+static INLINE int iround(float f)
+{
+ int r;
+ __asm__ ("fistpl %0" : "=m" (r) : "t" (f) : "st");
+ return r;
+}
+#elif defined(__MSC__) && defined(__WIN32__)
+static INLINE int iround(float f)
+{
+ int r;
+ _asm {
+ fld f
+ fistp r
+ }
+ return r;
+}
+#else
+#define IROUND(f) ((int) (((f) >= 0.0F) ? ((f) + 0.5F) : ((f) - 0.5F)))
+#endif
+
+
+/* Could maybe have an inline version of this?
+ */
+#if defined(__GNUC__)
+#define FABSF(x) fabsf(x)
+#else
+#define FABSF(x) ((GLfloat) fabs(x))
+#endif
+
+/* Pretty fast, and accurate.
+ * Based on code from http://www.flipcode.com/totd/
+ */
+static INLINE float LOG2(float val)
+{
+ union fi num;
+ int log_2;
+
+ num.f = val;
+ log_2 = ((num.i >> 23) & 255) - 128;
+ num.i &= ~(255 << 23);
+ num.i += 127 << 23;
+ num.f = ((-1.0f/3) * num.f + 2) * num.f - 2.0f/3;
+ return num.f + log_2;
+}
+
+
#endif