Vector distance.

float fast_distance ( floatn p0,
  floatn p1)


Returns fast_length(p0 - p1).


Built-in geometric functions operate component-wise. The description is per-component. floatn is float, float2, float3, or float4 and doublen is double, double2, double3, or double4. The built-in geometric functions are implemented using the round to nearest even rounding mode.

The geometric functions can be implemented using contractions such as mad or fma.


OpenCL Specification

Also see

Geometric Functions

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