Merge remote-tracking branch 'origin/master' into pipe-video

[mesa.git] / src / gallium / auxiliary / util / u_math.h

diff --git a/src/gallium/auxiliary/util/u_math.h b/src/gallium/auxiliary/util/u_math.h
index 37294b7203f1716df9f7bcdcfcfc026cbbd39efc..dad6a101fd7d23a6e3746e8a9f62b842adf2d310 100644 (file)
--- a/src/gallium/auxiliary/util/u_math.h
+++ b/src/gallium/auxiliary/util/u_math.h
@@ -176,7 +176,7 @@ static INLINE float logf( float f )
 
 #define isfinite(x) _finite((double)(x))
 #define isnan(x) _isnan((double)(x))
-#endif
+#endif /* _MSC_VER < 1400 && !defined(__cplusplus) */
 
 static INLINE double log2( double x )
 {
@@ -184,6 +184,18 @@ static INLINE double log2( double x )
    return log( x ) * invln2;
 }
 
+static INLINE double
+round(double x)
+{
+   return x >= 0.0 ? floor(x + 0.5) : ceil(x - 0.5);
+}
+
+static INLINE float
+roundf(float x)
+{
+   return x >= 0.0f ? floorf(x + 0.5f) : ceilf(x - 0.5f);
+}
+
 #endif /* _MSC_VER */
 
 
@@ -463,6 +475,17 @@ float_to_ubyte(float f)
    }
 }
 
+static INLINE float
+byte_to_float_tex(int8_t b)
+{
+   return (b == -128) ? -1.0F : b * 1.0F / 127.0F;
+}
+
+static INLINE int8_t
+float_to_byte_tex(float f)
+{
+   return (int8_t) (127.0F * f);
+}
 
 /**
  * Calc log base 2
@@ -558,11 +581,11 @@ util_bswap16(uint16_t n)
 #define MIN2( A, B )   ( (A)<(B) ? (A) : (B) )
 #define MAX2( A, B )   ( (A)>(B) ? (A) : (B) )
 
-#define MIN3( A, B, C ) MIN2( MIN2( A, B ), C )
-#define MAX3( A, B, C ) MAX2( MAX2( A, B ), C )
+#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))
 
-#define MIN4( A, B, C, D ) MIN2( MIN2( A, B ), MIN2(C, D) )
-#define MAX4( A, B, C, D ) MAX2( MAX2( A, B ), MAX2(C, D) )
+#define MIN4( A, B, C, D ) ((A) < (B) ? MIN3(A, C, D) : MIN3(B, C, D))
+#define MAX4( A, B, C, D ) ((A) > (B) ? MAX3(A, C, D) : MAX3(B, C, D))
 
 
 /**