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GLAST/LAT > DAQ and FSW > FSW > Doxygen Index > PBS / V2-10-14

Constituent: pbs_boot     Tag: rad750

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BSWP.ih.xx-ppc-gcc File Reference

Implements the PPC/GCC version of the inline BSWP routines. More...

Functions
BSWP__EXP_FNC unsigned int	BSWP__swap16 (unsigned short int val)
	Byte swaps a 16 bit word.
BSWP__EXP_FNC unsigned int	BSWP__load16 (const unsigned short int *src)
	Loads a byte swapped version of the 16 bit integer from memory.
BSWP__EXP_FNC unsigned int	BSWP__load16x (const unsigned short int *src, unsigned int offset)
	Loads a byte swapped version of the 16 bit integer from memory.
BSWP__EXP_FNC void	BSWP__store16 (unsigned short int *dst, unsigned short int val)
	Stores a byte swapped version of the 16 bit integer to memory.
BSWP__EXP_FNC void	BSWP__store16x (unsigned short int *dst, unsigned int offset, unsigned short int val)
	Stores a byte swapped version of the 16 bit integer to memory.
BSWP__EXP_FNC unsigned int	BSWP__swap32 (unsigned int val)
	Byte swaps a 32 bit word.
BSWP__EXP_FNC unsigned int	BSWP__load32 (const unsigned int *src)
	Loads a byte swapped version of the 32 bit integer from memory.
BSWP__EXP_FNC unsigned int	BSWP__load32x (const unsigned int *src, unsigned int offset)
	Loads a byte swapped version of the 32 bit integer from memory after applying the specified offset.
BSWP__EXP_FNC void	BSWP__store32 (unsigned int *dst, unsigned int val)
	Stores a byte swapped version of the 32 bit integer to memory.
BSWP__EXP_FNC void	BSWP__store32x (unsigned int *dst, unsigned int offset, unsigned int val)
	Stores a byte swapped version of the 32 bit integer to memory after a byte offset has been applied.

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Detailed Description

Implements the PPC/GCC version of the inline BSWP routines.

Author:

JJRussell - russell@slac.stanford.edu

    CVS $Id: BSWP.ih.xx-ppc-gcc,v 1.3 2004/12/07 16:13:06 russell Exp $

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Function Documentation

unsigned int BSWP__load16 (  const unsigned short int *  src  )

Loads a byte swapped version of the 16 bit integer from memory. Parameters: src  The address of the 16 bit integer to load Returns: The byte-swapped value of the 16 bit integer This routine should be used when loading 16 bit byte-swapped value from memory.

unsigned int BSWP__load16x (  const unsigned short int *  src, unsigned int  offset )

Loads a byte swapped version of the 16 bit integer from memory. Parameters: src  The address of the 16 bit integer to load offset  The byte offset from the source Returns: The byte-swapped value of the 16 bit integer This routine should be used when loading 16 bit byte-swapped value from memory. If the offset is known to be a constant, it is marginally more efficient to use BSWP__load16(). Warning: Note that offset is a byte offset and not an index. This is in keeping with the spirit that this instruction maps directly to the underlying instruction of the PPC.

unsigned int BSWP__load32 (  const unsigned int *  src  )

Loads a byte swapped version of the 32 bit integer from memory. Parameters: src  The address of the 32 bit integer to load Returns: The byte-swapped value of the 32 bit integer This routine should be used when loading 32 bit byte-swapped value from memory. If the value is already in a register, then use BSWP__swap32().

unsigned int BSWP__load32x (  const unsigned int *  src, unsigned int  offset )

Loads a byte swapped version of the 32 bit integer from memory after applying the specified offset. Parameters: src  The address of the 32 bit integer to load offset  The byte offset to be applied. Returns: The byte-swapped value of the 32 bit integer This routine should be used when loading 32 bit byte-swapped value from memory. If the value is already in a register, then use BSWP__swap32(). Warning: Note that offset is a byte offset and not an index. This is in keeping with the spirit that this instruction maps directly to the underlying instruction of the PPC.

void BSWP__store16 (  unsigned short int *  dst, unsigned short int  val )

Stores a byte swapped version of the 16 bit integer to memory. Parameters: dst  The address of the destination word val  The word to byte swap and store This routine should be used when storing a 16 bit byte-swapped value into memory.

void BSWP__store16x (  unsigned short int *  dst, unsigned int  offset, unsigned short int  val )

Stores a byte swapped version of the 16 bit integer to memory. Parameters: dst  The address of the destination word offset  A byte offset to apply to dst. val  The word to byte swap and store This routine should be used when storing a 16 bit byte-swapped value into memory. If the value is already in a register, then use BSWP__swap16(). If the offset is known to be a constant, it is marginally more efficient to use BSWP__store16(). Warning: Note that offset is a byte offset and not an index. This is in keeping with the spirit that this instruction maps directly to the underlying instruction of the PPC.

void BSWP__store32 (  unsigned int *  dst, unsigned int  val )

Stores a byte swapped version of the 32 bit integer to memory. Parameters: dst  The address of the destination word val  The word to byte swap and store This routine should be used when storing a 32 bit byte-swapped value into memory. If the value is already in a register, then use BSWP__swap32().

void BSWP__store32x (  unsigned int *  dst, unsigned int  offset, unsigned int  val )

Stores a byte swapped version of the 32 bit integer to memory after a byte offset has been applied. Parameters: dst  The address of the destination word offset  The byte offset to be applied val  The word to byte swap and store This routine should be used when storing a 32 bit byte-swapped value into memory. If the value is already in a register, then use BSWP__swap32(). If the offset is known to be a constant, it is marginally more efficient to use BSWP_store32(). Warning: Note that offset is a byte offset and not an index. This is in keeping with the spirit that this instruction maps directly to the underlying instruction of the PPC.

unsigned int BSWP__swap16 (  unsigned short int  val  )

Byte swaps a 16 bit word. Parameters: val  The 16 bit word to swap Returns: The byte-swapped value of the 16 bit integer This routine should be used when byte-swapping 16 bit quantities that are already in registers. The routines BSWP__load16() and BSWP__store16 should by used when loading or storing 16 bit quantities from/into memory.

unsigned int BSWP__swap32 (  unsigned int  val  )

Byte swaps a 32 bit word. Parameters: val  The 32 bit word to swap Returns: The byte-swapped value of the 32 bit integer This routine should be used when byte-swapping 32 bit quantities that are already in registers. The routines BSWP__load32() and BSWP__store32 should by used when loading or storing 32 bit quantities from/into memory.

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