gcc/testsuite/gcc.dg/uninit-22.c

   1 /* { dg-do compile } */
   2 /* { dg-options "-O3 -Wuninitialized --param vect-max-version-for-alias-checks=20" } */
   3
   4 #include <stdint.h>
   5
   6 #define A1  2896 /* (1/sqrt(2))<<12 */
   7 #define A2  2217
   8 #define A3  3784
   9 #define A4 -5352
  10
  11 #define IDCT_TRANSFORM(dest,s0,s1,s2,s3,s4,s5,s6,s7,d0,d1,d2,d3,d4,d5,d6,d7,munge,src) {\
  12     const int a0 = (src)[s0] + (src)[s4]; \
  13     const int a1 = (src)[s0] - (src)[s4]; \
  14     const int a2 = (src)[s2] + (src)[s6]; \
  15     const int a3 = (A1*((src)[s2] - (src)[s6])) >> 11; \
  16     const int a4 = (src)[s5] + (src)[s3]; \
  17     const int a5 = (src)[s5] - (src)[s3]; \
  18     const int a6 = (src)[s1] + (src)[s7]; \
  19     const int a7 = (src)[s1] - (src)[s7]; \
  20     const int b0 = a4 + a6; \
  21     const int b1 = (A3*(a5 + a7)) >> 11; \
  22     const int b2 = ((A4*a5) >> 11) - b0 + b1; \
  23     const int b3 = (A1*(a6 - a4) >> 11) - b2; \
  24     const int b4 = ((A2*a7) >> 11) + b3 - b1; \
  25     (dest)[d0] = munge(a0+a2   +b0); \
  26     (dest)[d1] = munge(a1+a3-a2+b2); \
  27     (dest)[d2] = munge(a1-a3+a2+b3); \
  28     (dest)[d3] = munge(a0-a2   -b4); \
  29     (dest)[d4] = munge(a0-a2   +b4); \
  30     (dest)[d5] = munge(a1-a3+a2-b3); \
  31     (dest)[d6] = munge(a1+a3-a2-b2); \
  32     (dest)[d7] = munge(a0+a2   -b0); \
  33 }
  34
  35 #define MUNGE_NONE(x) (x)
  36 #define IDCT_COL(dest,src) IDCT_TRANSFORM(dest,0,8,16,24,32,40,48,56,0,8,16,24,32,40,48,56,MUNGE_NONE,src)
  37
  38 #define MUNGE_ROW(x) (((x) + 0x7F)>>8)
  39 #define IDCT_ROW(dest,src) IDCT_TRANSFORM(dest,0,1,2,3,4,5,6,7,0,1,2,3,4,5,6,7,MUNGE_ROW,src)
  40
  41 static inline void bink_idct_col(int *dest, const int32_t *src)
  42 {
  43     if ((src[8]|src[16]|src[24]|src[32]|src[40]|src[48]|src[56])==0) {
  44         dest[0]  =
  45         dest[8]  =
  46         dest[16] =
  47         dest[24] =
  48         dest[32] =
  49         dest[40] =
  50         dest[48] =
  51         dest[56] = src[0];
  52     } else {
  53         IDCT_COL(dest, src);
  54     }
  55 }
  56
  57 int bink_idct_put_c(uint8_t *dest, int linesize, int32_t *block)
  58 {
  59     int i;
  60     int temp[64];
  61     for (i = 0; i < 8; i++)
  62         bink_idct_col(&temp[i], &block[i]);
  63     for (i = 0; i < 8; i++) {
  64         IDCT_ROW( (&dest[i*linesize]), (&temp[8*i]) );
  65     }
  66
  67     return 0;
  68 }
  69