#ifdef __ALTIVEC__
#pragma altivec_model on

#include <stdlib.h>		// for vec_malloc, although we are not using it

// the SIXTEENIZE macro can be used to INCREMENT (or leave the same) a pointer
// to be on a 16-byte boundary, required for vector operations. Note
// that all MSP signal buffers are 16-byte aligned so you don't need
// to do this to them. Note also that if you use this routine on
// a pointer you get back from, say, NewPtr or malloc, you should allocate
// the pointer with 16 extra bytes than you will actually use. If
// you use getbytes where you need to pass the original allocated
// pointer, you then need to store the original pointer as well as
// your vectorized pointer, for example:

// struct myobject {
//		char *x_mem;
//		char *x_vecmem;
//	};
//  x->x_mem = NewPtr(size + 16);
//  x->x_vecmem = SIXTEENIZE(x->x_mem);

#define SIXTEENIZE(p) ((((unsigned long)(p)) + 16) & 0xFFFFFFF0L);

typedef union 
{
	float			flt[4];
	vector float	vFlt;
} floatToVector;

static floatToVector __vsf_temp;

// this is what was needed to convince the compiler to copy a float to
// the four float locations in a vector

#define vec_splat_float(v,f) {							\
    __vsf_temp.flt[0] = f;								\
    v = vec_splat( vec_lde( 0, __vsf_temp.flt ), 0 );	}

#define VRSAVE     asm { li r0,-1 ; mtspr vrsave,r0 }
    
#pragma altivec_model off
#endif