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CLZ (Windows Embedded CE 6.0)

  • Article

1/5/2010

This ARM10 instruction counts the number of binary zero bits before the first binary one bit in a register value. The common _CountLeadingZeros, _CountLeadingZeros64intrinsic supports CLZ.

Syntax

unsigned cdecl _CountLeadingZeros(
  long Arg1
);

Parameters

  • Arg1
    [in] The value for which the leading zero bits should be determined.

Return Values

Number of binary zero bits.

Remarks

To generate the CLZ instruction for the _CountLeadingZeros intrinsic, use the -QRarch5 or -QRarch5T flag.

If you are compiling on an ARM4 microprocessor, the compiler generates a call to a library name, or to some other sequence of ARM 4 code.

Requirements

Architecture ARM
Header armintr.h
Routine CLZ

See Also

Reference

ARM10 Intrinsic Functions
/QRArch - Specify Target Architecture