findMSB — find the index of the most significant bit set to 1 in an integer
Specifies the value whose bits to scan.
findMSB returns the bit number of the most significant bit that is set to 1 in the binary
value. For positive integers, the result will be the bit number
of the most significant bit that is set to 1. For negative integers, the result will be the bit number of the
most significant bit set to 0. For a
value of zero or negative 1, -1 will be returned.
|OpenGL Shading Language Version|
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