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#include <errno.h>

#include "headers/truncd2.h"

#include "headers/tgammad2.h"

static __inline double _tgamma(double x)

{

  double res;

  vector double vx;

  vector double truncx;

  vector double vc = { 0.0, 0.0 };

  vector unsigned long long cmpres;

  vector signed int verrno, ferrno;

  vector signed int fail = { EDOM, EDOM, EDOM, EDOM };

  vx = spu_promote(x, 0);

  res = spu_extract(_tgammad2(vx), 0);

#ifndef _IEEE_LIBM

  /*

   * use vector truncd2 rather than splat x, and splat truncx.

   */

  truncx = _truncd2(vx);

  cmpres = spu_cmpeq(truncx, vx);

  verrno = spu_splats(errno);

  ferrno = spu_sel(verrno, fail, (vector unsigned int) cmpres);

  cmpres = spu_cmpgt(vc, vx);

  errno = spu_extract(spu_sel(verrno, ferrno, (vector unsigned int) cmpres), 0);

#endif

  return res;

}