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GLAST/LAT > DAQ and FSW > FSW > Doxygen Index > PBS / V2-10-11

Constituent: pbs     Tag: linux-gcc

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LSU_pvt.ih File Reference

Linear Scaling Utilities, private inline include file. More...

#include "PBS/FFS.ih"

Include dependency graph for LSU_pvt.ih:

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Functions
static __inline unsigned	lsu__mulhwu (unsigned int mult, unsigned int x)
	Computes and returns the most significant 32-bits of a 32 x 32-bit unsigned integer multiple.
static __inline unsigned int	lsu__scale (unsigned int mult, int shift, unsigned int dx)
	Helper function to convert x to a scaled value.

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Detailed Description

Linear Scaling Utilities, private inline include file.

Author:

JJRussell - russell@slac.stanford.edu

   CVS $Id: LSU_pvt.ih,v 1.1 2005/02/14 16:34:52 russell Exp $

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Function Documentation

static __inline unsigned int lsu__mulhwu (  unsigned int  mult, unsigned int  x )  [static]

Computes and returns the most significant 32-bits of a 32 x 32-bit unsigned integer multiple. Returns: The most significant 32-bits of a 32 x 32-bit unsigned integer multiple. This routine returns only the most significant 32-bits of a 32 x 32-bit multiple. On the PPC, this can be accomplished by using the mulhwu instruction. On other platforms, the straight-forward 32 x 32-bit multiple is done, and the correct bits are extracted

static __inline unsigned int lsu__scale (  unsigned int  mult, int  shift, unsigned int  x )  [static]

Helper function to convert x to a scaled value. Returns: The scaled value Parameters: mult  The multiplying scale factor shift  The shift scale factor x  The value to scale This routine can be used after the multiply and shift factors have been extracted from the LSU function. In many cases, these factors are being update asynchronously, so the extraction must be done in an interlocked fashion. In other cases, no such restrictions apply, and this more bare-bones routine is all that is necessary

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