spirv_std::arch

Enum QuadDirection

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pub enum QuadDirection {
    Horizontal = 0,
    Vertical = 1,
    Diagonal = 2,
}
Expand description

Direction is the kind of swap to perform.

Direction must be a scalar of integer type, whose Signedness operand is 0.

Direction must come from a constant instruction.

The value returned in Result is the value provided to Value by another invocation in the same quad scope instance. The invocation providing this value is determined according to Direction.

Requires Capability GroupNonUniformQuad.

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Horizontal = 0

A Direction of 0 indicates a horizontal swap;

  • Invocations with quad indices of 0 and 1 swap values
  • Invocations with quad indices of 2 and 3 swap values
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Vertical = 1

A Direction of 1 indicates a vertical swap;

  • Invocations with quad indices of 0 and 2 swap values
  • Invocations with quad indices of 1 and 3 swap values
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Diagonal = 2

A Direction of 2 indicates a diagonal swap;

  • Invocations with quad indices of 0 and 3 swap values
  • Invocations with quad indices of 1 and 2 swap values

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