/* Copyright (c) 2010 Nokia Corporation and/or its subsidiary(-ies).

 *

 * Permission is hereby granted, free of charge, to any person obtaining a

 * copy of this software and associated documentation files (the "Software"),

 * to deal in the Software without restriction, including without limitation

 * the rights to use, copy, modify, merge, publish, distribute, sublicense,

 * and/or sell copies of the Software, and to permit persons to whom the

 * Software is furnished to do so, subject to the following conditions:

 *

 * The above copyright notice and this permission notice shall be included

 * in all copies or substantial portions of the Software.

 *

 * 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.

 *

 * Initial Contributors:

 * Nokia Corporation - initial contribution.

 *

 * Contributors:

 *

 * Description:

 *

 */

#include "half.h"

GLfloat dglConvertHalfToFloat(khronos_int16_t half)

{

	// INF and NaN are mapped to floating point values.

	khronos_int32_t exponent = half & 0x7c00;

	khronos_int16_t mantissa = half & 0x03ff;

	if(!exponent)

	{

		if(mantissa)

		{

			// Subnormals are mapped to zero.

			mantissa = 0;

		}

	}

	else

	{

		// Convert bias.

		exponent += 0x1c000;

	}

	{

		khronos_int32_t conv = ((half & 0x8000) << 16) |

							   (exponent << 13) |

							   (mantissa << 13);

		return *(GLfloat*)&conv;

	}

}