gcc/testsuite/gcc.target/i386/vect-pr67800.c

   1 /* { dg-do compile } */
   2 /* { dg-options "-O2 -ftree-vectorize -fdump-tree-vect-details" } */
   3 /* { dg-additional-options "-msse4.2" } */
   4
   5 #define ubyte unsigned char
   6 #define byte char
   7
   8 #define SCALE 8
   9
  10 #define R2Y (76)
  11 #define G2Y (150)
  12 #define B2Y (30)
  13 #define R2I (127)
  14 #define G2I (-59)
  15 #define B2I (-68)
  16 #define R2Q (51)
  17 #define G2Q (-127)
  18 #define B2Q (76)
  19
  20 void
  21 convert(ubyte *in, ubyte *out, unsigned n)
  22 {
  23   ubyte r, g, b;
  24   ubyte y = 0;
  25   byte i, q;
  26
  27   while (--n) {
  28           r = *in++;
  29           g = *in++;
  30           b = *in++;
  31
  32       y = (ubyte)(((R2Y * r) + (G2Y * g) + (B2Y * b) + (1 << (SCALE - 1))) >> SCALE);
  33       i = (byte)(((R2I * r) + (G2I * g) + (B2I * b) + (1 << (SCALE - 1))) >> SCALE);
  34       q = (byte)(((R2Q * r) + (G2Q * g) + (B2Q * b) + (1 << (SCALE - 1))) >> SCALE);
  35
  36       *out++ = y;
  37           *out++ = i;
  38           *out++ = q;
  39   }
  40 }
  41
  42 /* { dg-final { scan-tree-dump "vectorized 1 loops" "vect" } } */