imm_atomic_xor (sm5 - asm)

Immediate atomic bitwise XOR to memory. Returns value in memory before the XOR.

imm_atomic_xor dst0[.single_component_mask], dst1, dstAddress[.swizzle], src0[.select_component]

 

ItemDescription

dst0

[in] Contains the value from dst1 before the XOR.

dst1

[in] An unordered access view (UAV) (u#). In the compute shader this can also be thread group shared memory (g#).

dstAddress

[in] The memory address.

src0

The value to XOR with dst1.

 

Remarks

This instruction performs a single component 32-bit bitwise XOR of operand src0 with dst1 at 32-bit per component address dstAddress.

If dst1 is a u#, it may have been declared as raw, typed or structured. If typed, it must be declared as UINT/SINT with the bound resource format being R32_UINT/_SINT.

If dst1 is g#, it must be declared as raw or structured.

The value in dst1 memory before the XOR is returned to dst0.

The entire operation is performed atomically.

The number of components taken from the address is determined by the dimensionality of the resource declared at dst1.

If the shader invocation is inactive, for exammple if the pixel has been discarded earlier in its execution, or a pixel/sample invocation only exists to serve as a helper to a real pixel/sample for derivatives, this instruction does not alter the dst1 memory at all, and the returned value is undefined.

Out of bounds addressing on u# causes nothing to be written to memory, except if the u# is structured, and byte offset into the struct (second component of the address) is causing the out of bounds access, then the entire contents of the UAV become undefined.

Out of bounds addressing on u# or g# causes an undefined result to be returned to the shader in dst0.

This instruction applies to the following shader stages:

VertexHullDomainGeometryPixelCompute
XX

 

Because UAVs are available at all shader stages for Direct3D 11.1, this instruction applies to all shader stages for the Direct3D 11.1 runtime, which is available starting with Windows 8.

VertexHullDomainGeometryPixelCompute
XX XXXX

 

Minimum Shader Model

This instruction is supported in the following shader models:

Shader ModelSupported
Shader Model 5 yes
Shader Model 4.1 no
Shader Model 4 no
Shader Model 3 (DirectX HLSL) no
Shader Model 2 (DirectX HLSL) no
Shader Model 1 (DirectX HLSL) no

 

 

 

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