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	}			}
	#endif			#endif

	ccl_device_inline float len(const float2 a)			ccl_device_inline float len(const float2 a)
	{			{
	return sqrtf(dot(a, a));			return sqrtf(dot(a, a));
	}			}

				ccl_device_inline float len_squared(const float2 a)
				{
				return dot(a, a);
				}

	#if !defined(__KERNEL_METAL__)			#if !defined(__KERNEL_METAL__)
	ccl_device_inline float distance(const float2 a, const float2 b)			ccl_device_inline float distance(const float2 a, const float2 b)
	{			{
	return len(a - b);			return len(a - b);
	}			}

	ccl_device_inline float cross(const float2 a, const float2 b)			ccl_device_inline float cross(const float2 a, const float2 b)
	{			{
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