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_Dot4dV

  • Article

9/7/2007

Computes the inner product of a pair of four-dimensional vectors.

Syntax

float _Dot4dV( 
  float* vector1, 
  float* vector2 
);

Parameters

  • vector1
    [in] Pointer to a four-dimensional source vector.
  • vector2
    [in] Pointer to a four-dimensional destination vector.

Return Values

The scalar resulting from the inner product.

Remarks

The following code example shows how to compute the inner product of four-dimensional vectors.

/***********************************************************/
#include <stdio.h>
#include <shintr.h>
void main()
{
     float retval;
     float v1[4] = {1.0, 2.0, 3.0, 4.0};
     float v2[4] = {2.0, 3.0, 4.0, 5.0};
     retval = _Dot4dV(v1, v2);
     printf("retval=%f\n", retval);
}

This example results in the following output.

retval=40.000000

Requirements

Routine Required header Architecture

_Dot4dV

<shintr.h>

SH-4

See Also

Reference

Intrinsic Functions for Renesas Microprocessors
_Dot3dVW0
_Dot3dVW1