XMLoadDecN4 function (directxpackedvector.h)
Loads an XMDECN4 into an XMVECTOR.
XMVECTOR XM_DEPRECATED XM_CALLCONV XMLoadDecN4(
[in] const XMDECN4 *pSource
) noexcept;
[in] pSource
Address of the XMDECN4 structure to load.
Returns an XMVECTOR loaded with the data from the pSource parameter.
The following pseudocode demonstrates the operation of the function.
XMVECTOR vectorOut;
uint32_t Element;
static const uint32_t SignExtend[] = {0x00000000, 0xFFFFFC00};
static const uint32_t SignExtendW[] = {0x00000000, 0xFFFFFFFC};
Element = pSource->v & 0x3FF;
vectorOut.x = (float)(int16_t)(Element | SignExtend[Element >> 9]) / 511.0f;
Element = (pSource->v >> 10) & 0x3FF;
vectorOut.y = (float)(int16_t)(Element | SignExtend[Element >> 9]) / 511.0f;
Element = (pSource->v >> 20) & 0x3FF;
vectorOut.z = (float)(int16_t)(Element | SignExtend[Element >> 9]) / 511.0f;
Element = pSource->v >> 30;
vectorOut.w = (float)(int16_t)(Element | SignExtendW[Element >> 1]);
return vectorOut;
Microsoft Visual Studio 2010 or Microsoft Visual Studio 2012 with the Windows SDK for Windows 8. Supported for Win32 desktop apps, Windows Store apps, and Windows Phone 8 apps.
Requirement | Value |
---|---|
Target Platform | Windows |
Header | directxpackedvector.h (include DirectXMath.h) |