gcc/testsuite/gcc.c-torture/compile/20070520-1.c

   1 typedef unsigned char uint8_t;
   2 extern uint8_t ff_cropTbl[256 + 2 * 1024];
   3
   4 void ff_pred8x8_plane_c(uint8_t *src, int stride){
   5   int j, k;
   6   int a;
   7   uint8_t *cm = ff_cropTbl + 1024;
   8   const uint8_t * const src0 = src+3-stride;
   9   const uint8_t *src1 = src+4*stride-1;
  10   const uint8_t *src2 = src1-2*stride;
  11   int H = src0[1] - src0[-1];
  12   int V = src1[0] - src2[ 0];
  13   for(k=2; k<=4; ++k) {
  14     src1 += stride; src2 -= stride;
  15     H += k*(src0[k] - src0[-k]);
  16     V += k*(src1[0] - src2[ 0]);
  17   }
  18   H = ( 17*H+16 ) >> 5;
  19   V = ( 17*V+16 ) >> 5;
  20
  21   a = 16*(src1[0] + src2[8]+1) - 3*(V+H);
  22   for(j=8; j>0; --j) {
  23     int b = a;
  24     a += V;
  25     src[0] = cm[ (b ) >> 5 ];
  26     src[1] = cm[ (b+ H) >> 5 ];
  27     src[2] = cm[ (b+2*H) >> 5 ];
  28     src[3] = cm[ (b+3*H) >> 5 ];
  29     src[4] = cm[ (b+4*H) >> 5 ];
  30     src[5] = cm[ (b+5*H) >> 5 ];
  31     src[6] = cm[ (b+6*H) >> 5 ];
  32     src[7] = cm[ (b+7*H) >> 5 ];
  33     src += stride;
  34   }
  35 }