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Version: 1.1.0
For the complete Mojo documentation index, see llms.txt. Markdown versions of all pages are available by appending .md to any URL (e.g. /docs/manual/basics.md).

log2_floor

def log2_floor[dtype: DType, width: SIMDLength, //](val: SIMD[dtype, width]) -> SIMD[dtype, width]

Returns the floor of the base-2 logarithm of an integer value.

Parameters:

  • ​dtype (DType): The dtype of the input SIMD vector.
  • ​width (SIMDLength): The width of the input and output SIMD vector.

Args:

Returns:

SIMD[dtype, width]: The floor of the base-2 logarithm of the input value, which is equal to the position of the highest set bit. Returns -1 if val is 0 or negative.

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