mesa: whitespace fixes, just to be consistent

[mesa.git] / src / mesa / main / imports.h

diff --git a/src/mesa/main/imports.h b/src/mesa/main/imports.h
index 5ea647ad8d73a038e6fc2f8b1817f8fa5c08f793..70defdc4327a877db058f8b6a48d3d3683340b5a 100644 (file)
--- a/src/mesa/main/imports.h
+++ b/src/mesa/main/imports.h
@@ -134,7 +134,13 @@ typedef union { GLfloat f; GLint i; } fi_type;
 #define exp2f(f) ((float) exp2(f))
 #define floorf(f) ((float) floor(f))
 #define logf(f) ((float) log(f))
+
+#ifdef ANDROID
+#define log2f(f) (logf(f) * (float) (1.0 / M_LN2))
+#else
 #define log2f(f) ((float) log2(f))
+#endif
+
 #define powf(x,y) ((float) pow(x,y))
 #define sinf(f) ((float) sin(f))
 #define sinhf(f) ((float) sinh(f))
@@ -486,6 +492,27 @@ _mesa_next_pow_two_64(uint64_t x)
 }
 
 
+/*
+ * Returns the floor form of binary logarithm for a 32-bit integer.
+ */
+static INLINE GLuint
+_mesa_logbase2(GLuint n)
+{
+#if defined(__GNUC__) && \
+   ((__GNUC__ == 3 && __GNUC_MINOR__ >= 4) || __GNUC__ >= 4)
+   return (31 - __builtin_clz(n | 1));
+#else
+   GLuint pos = 0;
+   if (n >= 1<<16) { n >>= 16; pos += 16; }
+   if (n >= 1<< 8) { n >>=  8; pos +=  8; }
+   if (n >= 1<< 4) { n >>=  4; pos +=  4; }
+   if (n >= 1<< 2) { n >>=  2; pos +=  2; }
+   if (n >= 1<< 1) {           pos +=  1; }
+   return pos;
+#endif
+}
+
+
 /**
  * Return 1 if this is a little endian machine, 0 if big endian.
  */
@@ -539,6 +566,24 @@ _mesa_inv_sqrtf(float x);
 extern void
 _mesa_init_sqrt_table(void);
 
+#ifdef __GNUC__
+
+#if defined(__MINGW32__) || defined(ANDROID)
+#define ffs __builtin_ffs
+#define ffsll __builtin_ffsll
+#endif
+
+#define _mesa_ffs(i)  ffs(i)
+#define _mesa_ffsll(i)  ffsll(i)
+
+#if ((_GNUC__ == 3 && __GNUC_MINOR__ >= 4) || __GNUC__ >= 4)
+#define _mesa_bitcount(i) __builtin_popcount(i)
+#else
+extern unsigned int
+_mesa_bitcount(unsigned int n);
+#endif
+
+#else
 extern int
 _mesa_ffs(int32_t i);
 
@@ -547,6 +592,7 @@ _mesa_ffsll(int64_t i);
 
 extern unsigned int
 _mesa_bitcount(unsigned int n);
+#endif
 
 extern GLhalfARB
 _mesa_float_to_half(float f);