Copy libGLESv2 to libGLES_CM.
BUG=18110152
Change-Id: Ibf9b8c47e2d7c145d844ac4e69d6a20a7342d5db
Reviewed-on: https://swiftshader-review.googlesource.com/1230
Reviewed-by: Nicolas Capens <nicolascapens@google.com>
Tested-by: Nicolas Capens <nicolascapens@google.com>
diff --git a/src/GLES2/libGLES_CM/mathutil.h b/src/GLES2/libGLES_CM/mathutil.h
new file mode 100644
index 0000000..9955fb2
--- /dev/null
+++ b/src/GLES2/libGLES_CM/mathutil.h
@@ -0,0 +1,79 @@
+// SwiftShader Software Renderer
+//
+// Copyright(c) 2005-2012 TransGaming Inc.
+//
+// All rights reserved. No part of this software may be copied, distributed, transmitted,
+// transcribed, stored in a retrieval system, translated into any human or computer
+// language by any means, or disclosed to third parties without the explicit written
+// agreement of TransGaming Inc. Without such an agreement, no rights or licenses, express
+// or implied, including but not limited to any patent rights, are granted to you.
+//
+
+// mathutil.h: Math and bit manipulation functions.
+
+#ifndef LIBGLESV2_MATHUTIL_H_
+#define LIBGLESV2_MATHUTIL_H_
+
+#include "common/debug.h"
+
+#include <math.h>
+
+namespace gl
+{
+inline bool isPow2(int x)
+{
+ return (x & (x - 1)) == 0 && (x != 0);
+}
+
+inline int log2(int x)
+{
+ int r = 0;
+ while((x >> r) > 1) r++;
+ return r;
+}
+
+inline unsigned int ceilPow2(unsigned int x)
+{
+ if(x != 0) x--;
+ x |= x >> 1;
+ x |= x >> 2;
+ x |= x >> 4;
+ x |= x >> 8;
+ x |= x >> 16;
+ x++;
+
+ return x;
+}
+
+template<typename T, typename MIN, typename MAX>
+inline T clamp(T x, MIN min, MAX max)
+{
+ return x < min ? min : (x > max ? max : x);
+}
+
+inline float clamp01(float x)
+{
+ return clamp(x, 0.0f, 1.0f);
+}
+
+template<const int n>
+inline unsigned int unorm(float x)
+{
+ const unsigned int max = 0xFFFFFFFF >> (32 - n);
+
+ if(x > 1)
+ {
+ return max;
+ }
+ else if(x < 0)
+ {
+ return 0;
+ }
+ else
+ {
+ return (unsigned int)(max * x + 0.5f);
+ }
+}
+}
+
+#endif // LIBGLESV2_MATHUTIL_H_
