/* wdbAltivecLib.c - Altivec register support for the external WDB agent *//* Copyright 1984-1996 Wind River Systems, Inc. *//*modification history--------------------01h,30apr02,pcs  Remove the pointer corruption in fn. wdbAltivecLibInit01g,07jun01,kab  Testing only01f,29may01,kab  Hide altivecLib.h from non-altivec builds01e,13apr01,pcs  Move decleration of altivecRegSetObj to                 wdb/wdbRegs.hAllocated mem for ALTIVEC_REG_SET_OBJ at init                 time and make sure thatit is 16 byte aligned.01d,23mar01,dtr  Tidying up.01c,19mar01,tpw  Rename WDB_REG_SET_ALTIVEC to WDB_REG_SET_AV for consistency                 with WTX and other REG_SET names.01b,19mar01,dtr  Changing header file name altiVecLib.h.01a,01mar01,dtr Created library.*//*DESCPRIPTIONThis library contains routines to save, restore, get, andset the altivec registers. These operations arenot task-specific.*/#include "vxWorks.h"#ifdef  _WRS_ALTIVEC_SUPPORT#include "wdb/wdbRegs.h"#include "string.h"#include "altivecLib.h"/*  * The ALTIVEC_REG_SET_OBJ is defined as a pointer and mem for it allocated at * run time. The reason for this is to ensure that this object especially the * first element altivecContext is 16 byte aligned. */ALTIVEC_REG_SET_OBJ * pAltivecRegSetObj;/******************************************************************************** wdbAltivecSave - save the altivec registers.*/ void wdbAltivecSave (void)    {    altivecSave (&pAltivecRegSetObj->altivecContext);    }/******************************************************************************** wdbAltivecRestore - restore the previously saved altivec regs.*/ void wdbAltivecRestore (void)    {    altivecRestore (&pAltivecRegSetObj->altivecContext);    }/******************************************************************************** wdbAltivecGet - get a pointer to the altivec reg block.*/ void wdbAltivecGet    (    void ** ppRegs    )    {    *ppRegs = (void *) &pAltivecRegSetObj->altivecContext;    }/******************************************************************************** wdbAltivecSet - set the Altivec reg block.*/ void wdbAltivecSet    (    void * pRegs    )    {    bcopy ((char *)pRegs, (char *) &pAltivecRegSetObj->altivecContext, sizeof (ALTIVEC_CONTEXT));    }/******************************************************************************** wdbAltivecLibInit - initialize a WDB_REG_SET_OBJ representing altivec regs.** RETURNS: a pointer to a WDB_REG_SET_OBJ*/ WDB_REG_SET_OBJ * wdbAltivecLibInit (void)    {    WDB_REG_SET_OBJ * pRegSet;    /*  Ensure that the ALTIVEC_REG_SET_OBJ object is 16 byte aligned. This is with the assumption        that altiveccontext is the first element in the object.     */    pAltivecRegSetObj = (ALTIVEC_REG_SET_OBJ *) memalign (16, sizeof (ALTIVEC_REG_SET_OBJ));    bzero ((char *)pAltivecRegSetObj, sizeof (ALTIVEC_REG_SET_OBJ));    altivecSave (&pAltivecRegSetObj->altivecContext);    pRegSet = &pAltivecRegSetObj->regSet;    pRegSet->regSetType	= WDB_REG_SET_AV;    pRegSet->save	= wdbAltivecSave;    pRegSet->load	= wdbAltivecRestore;    pRegSet->get	= (void (*) (char **)) wdbAltivecGet;    pRegSet->set	= (void (*) (char *))  wdbAltivecSet;    return (pRegSet);    }#endif /* (_WRS_ALTIVEC_SUPPORT==TRUE) */