gcc/testsuite/gcc.target/powerpc/pr85698.c

   1 /* { dg-do run } */
   2 /* { dg-require-effective-target vsx_hw } */
   3 /* { dg-options "-O3 -mdejagnu-cpu=power7" } */
   4
   5 /* PR85698: Incorrect code generated on LE due to use of stxvw4x. */
   6
   7 typedef unsigned char uint8_t;
   8 typedef short int16_t;
   9 extern void abort (void);
  10 extern int memcmp(const void *, const void *, __SIZE_TYPE__);
  11
  12 uint8_t expected[128] =
  13 {14, 0, 4, 2, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16, 17, 18, 19, 20, 21,
  14  22, 23, 24, 25, 26, 27, 28, 29, 30, 31, 28, 35, 33, 35, 36, 37, 38, 39, 40,
  15  41, 42, 43, 44, 45, 46, 47, 48, 49, 50, 51, 52, 53, 54, 55, 56, 57, 58, 59,
  16  60, 61, 62, 63, 66, 63, 66, 67, 68, 69, 70, 71, 72, 73, 74, 75, 76, 77, 78,
  17  79, 80, 81, 82, 83, 84, 85, 86, 87, 88, 89, 90, 91, 92, 93, 94, 95, 97, 96,
  18  98, 99, 100, 101, 102, 103, 104, 105, 106, 107, 108, 109, 110, 111, 112, 113,
  19  114, 115, 116, 117, 118, 119, 120, 121, 122, 123, 124, 125, 126, 127};
  20
  21 static uint8_t x264_clip_uint8( int x )
  22 {
  23   return x&(~255) ? (-x)>>31 : x;
  24 }
  25 void add4x4_idct( uint8_t *p_dst, int16_t dct[16])
  26 {
  27   int16_t d[16];
  28   int16_t tmp[16];
  29   int i, y, x;
  30   for( i = 0; i < 4; i++ )
  31     {
  32       int s02 =  dct[0*4+i]     +  dct[2*4+i];
  33       int d02 =  dct[0*4+i]     -  dct[2*4+i];
  34       int s13 =  dct[1*4+i]     + (dct[3*4+i]>>1);
  35       int d13 = (dct[1*4+i]>>1) -  dct[3*4+i];
  36       tmp[i*4+0] = s02 + s13;
  37       tmp[i*4+1] = d02 + d13;
  38       tmp[i*4+2] = d02 - d13;
  39       tmp[i*4+3] = s02 - s13;
  40     }
  41   for( i = 0; i < 4; i++ )
  42     {
  43       int s02 =  tmp[0*4+i]     +  tmp[2*4+i];
  44       int d02 =  tmp[0*4+i]     -  tmp[2*4+i];
  45       int s13 =  tmp[1*4+i]     + (tmp[3*4+i]>>1);
  46       int d13 = (tmp[1*4+i]>>1) -  tmp[3*4+i];
  47       d[0*4+i] = ( s02 + s13 + 32 ) >> 6;
  48       d[1*4+i] = ( d02 + d13 + 32 ) >> 6;
  49       d[2*4+i] = ( d02 - d13 + 32 ) >> 6;
  50       d[3*4+i] = ( s02 - s13 + 32 ) >> 6;
  51     }
  52   for( y = 0; y < 4; y++ )
  53     {
  54       for( x = 0; x < 4; x++ )
  55         p_dst[x] = x264_clip_uint8( p_dst[x] + d[y*4+x] );
  56       p_dst += 32;
  57     }
  58 }
  59
  60 int main()
  61 {
  62   uint8_t dst[128];
  63   int16_t dct[16];
  64   int i;
  65
  66   for (i = 0; i < 16; i++)
  67     dct[i] = i*10 + i;
  68   for (i = 0; i < 128; i++)
  69     dst[i] = i;
  70
  71   add4x4_idct(dst, dct);
  72
  73   if (memcmp (dst, expected, 128))
  74     abort();
  75
  76  return 0;
  77 }
  78