text: /* --------------------------------------------------------------  */
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  /* PROLOG END TAG zYx                                              */
  #ifdef __SPU__    
  #ifndef _TRUNCF4_H_
  #define _TRUNCF4_H_	1
      
  #include <spu_intrinsics.h>
      
  /*
   * FUNCTION
   *      vector float _truncf4(vector float x)
   *
   * DESCRIPTION
   *      The _truncf4 function truncates the elements of the input vector
   *      downwards (towards zero) to the nearest integer.
   *
   */
  static __inline vector float _truncf4(vector float x) 
  {
    vec_int4 exp;
    vec_uint4 or_mask, and_mask, mask;
    vec_float4 out;
      
    // Construct a mask to remove the fraction bits. The mask
    // depends on the exponent of the floating point
    // input value.
    exp = spu_sub(127, spu_and(spu_rlmask((vec_int4) x, -23), 0xFF));
  
    // Be sure to always preserve the sign bit
    or_mask = spu_rlmask(spu_cmpgt(exp, 0),-1);
  
    and_mask = spu_rlmask(spu_splats((unsigned int)0x7FFFFF), exp);
    mask = spu_or(spu_and(and_mask, spu_cmpgt(exp, -31)), or_mask);
      
    // Apply the mask and return the result.
      
    out = spu_andc(x, (vec_float4) (mask));
    return (out);
  }
  #endif /* _TRUNCF4_H_ */
  #endif /* __SPU__ */
  