gcc/testsuite/gcc.target/i386/pr21101.c

   1 /* { dg-do compile } */
   2 /* { dg-options "-O2 -funroll-loops -march=nocona" } */
   3
   4 #include <mmintrin.h>
   5
   6 int W;
   7 void f()
   8 {
   9   int j;
  10   int B, C;
  11   unsigned char* S;
  12   __m64 *T = (__m64 *) &W;
  13
  14   for (j = 0; j < 16; j++, T++)
  15   {
  16     T[0] = T[1] = _mm_set1_pi8(*S);
  17     S += W;
  18   }
  19
  20   C = 3 * B;
  21
  22   __m64 E = _mm_set_pi16(3 * B, 3 * B, 3 * B, 5 * B);
  23   __m64 G = _mm_set1_pi16(3 * B);
  24
  25   for (j = 0; j < 16; j++)
  26   {
  27     __m64 R = _mm_set1_pi16(B + j * C);
  28     R = _m_paddw(R, E);
  29     R = _m_paddw(R, G);
  30     T[0] = _mm_srai_pi16(R, 3);
  31   }
  32 }