DirectXMath Library Compiler Directives
Compiler directives tune the functionality that the DirectXMath library uses.
| Directive | Description |
|---|---|
| _XM_NO_INTRINSICS_ |
When _XM_NO_INTRINSICS_ is defined, DirectXMath operations are implemented without using any platform-specific intrinsics. Instead, DirectXMath uses only standard floating point operations. By default, _XM_NO_INTRINSICS_ is not defined. Note This directive overrides all other directives. Therefore, we recommend that you check for _XM_NO_INTRINSICS_ before you determine the status of _XM_ARM_NEON_INTRINSICS_ or _XM_SSE_INTRINSICS_. |
| _XM_SSE_INTRINSICS_ |
When _XM_SSE_INTRINSICS_ is defined, code is compiled to use supporting SSE and SSE2 on platforms that support these instruction sets. The Windows versions providing SSE intrinsics support both SSE and SSE2. _XM_SSE_INTRINSICS_ has no effect on systems that do not support SSE and SSE2. By default, _XM_SSE_INTRINSICS_ is defined when users compile for a Windows platform. Note DirectXMath uses the standard compiler defines (_M_IX86 / _M_AMD64) to determine Windows x86 or Windows x64 targets. |
| _XM_ARM_NEON_INTRINSICS_ | This indicates the DirectXMath implementation uses of the ARM-NEON intrinsics. By defualt, _XM_ARM_NEON_INTRINSICS_ is defined when users compile for a Windows RT platform. DirectXMath uses the standard compiler define (_M_ARM) to determine this binary target. Note ARM-NEON intrinsics support is new to DirectXMath and is not supported by XNAMath 2.x. |
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Build date: 11/14/2012
