Subversion Repositories openrisc_2011-10-31

/* PR target/9732

   This testcase segfaulted on PPC because PIC_OFFSET_TABLE_REGNUM was no

   fixed register.

   Distilled from the xvid sources by Guillaume Morin <guillaume@morinfr.org>

   and Benjamin Herrenschmidt <benh@kernel.crashing.org>.  */

/* { dg-do run { target fpic } } */

/* { dg-options "-O2 -fPIC" } */

extern void exit (int);

#define W1 2841                                 /* 2048*sqrt(2)*cos(1*pi/16) */

#define W2 2676                                 /* 2048*sqrt(2)*cos(2*pi/16) */

#define W3 2408                                 /* 2048*sqrt(2)*cos(3*pi/16) */

#define W5 1609                                 /* 2048*sqrt(2)*cos(5*pi/16) */

#define W6 1108                                 /* 2048*sqrt(2)*cos(6*pi/16) */

#define W7 565                                  /* 2048*sqrt(2)*cos(7*pi/16) */

/* private data */

static short iclip[1024];               /* clipping table */

static short *iclp;

void

idct_int32(short *const block)

{

  static short *blk;

  static long i;

  static long X0, X1, X2, X3, X4, X5, X6, X7, X8;

  for (i = 0; i < 8; i++)                /* idct columns */

    {

      blk = block + i;

      /* shortcut  */

      if (! ((X1 = (blk[8 * 4] << 8)) | (X2 = blk[8 * 6])

             | (X3 = blk[8 * 2]) | (X4 = blk[8 * 1]) | (X5 = blk[8 * 7])

             | (X6 = blk[8 * 5]) | (X7 = blk[8 * 3])))

        {

          blk[8 * 0] = blk[8 * 1] = blk[8 * 2] =

            blk[8 * 3] = blk[8 * 4] =

            blk[8 * 5] = blk[8 * 6] = blk[8 * 7] =

            iclp[(blk[8 * 0] + 32) >> 6];

          continue;

        }

      X0 = (blk[8 * 0] << 8) + 8192;

      /* first stage  */

      X8 = W7 * (X4 + X5) + 4;

      X4 = (X8 + (W1 - W7) * X4) >> 3;

      X5 = (X8 - (W1 + W7) * X5) >> 3;

      X8 = W3 * (X6 + X7) + 4;

      X6 = (X8 - (W3 - W5) * X6) >> 3;

      X7 = (X8 - (W3 + W5) * X7) >> 3;

      /* second stage  */

      X8 = X0 + X1;

      X0 -= X1;

      X1 = W6 * (X3 + X2) + 4;

      X2 = (X1 - (W2 + W6) * X2) >> 3;

      X3 = (X1 + (W2 - W6) * X3) >> 3;

      X1 = X4 + X6;

      X4 -= X6;

      X6 = X5 + X7;

      X5 -= X7;

      /* third stage  */

      X7 = X8 + X3;

      X8 -= X3;

      X3 = X0 + X2;

      X0 -= X2;

      X2 = (181 * (X4 + X5) + 128) >> 8;

      X4 = (181 * (X4 - X5) + 128) >> 8;

      /* fourth stage  */

      blk[8 * 0] = iclp[(X7 + X1) >> 14];

      blk[8 * 1] = iclp[(X3 + X2) >> 14];

      blk[8 * 2] = iclp[(X0 + X4) >> 14];

      blk[8 * 3] = iclp[(X8 + X6) >> 14];

      blk[8 * 4] = iclp[(X8 - X6) >> 14];

      blk[8 * 5] = iclp[(X0 - X4) >> 14];

      blk[8 * 6] = iclp[(X3 - X2) >> 14];

      blk[8 * 7] = iclp[(X7 - X1) >> 14];

    }

}                                                               /* end function idct_int32(block) */

int main(void) {

  int i;

  unsigned short tab[64];

  for (i = 0 ; i < 64 ; ++i)

    {

      tab[i] = (1+(int) (65535)*8000/(2147483647+1.0));

    }

  iclp = iclip + 512;

  for (i = -512; i < 512; i++)

    iclp[i] = (i < -256) ? -256 : ((i > 255) ? 255 : i);

  idct_int32((short *) tab);

  exit (0);

}