gcc/testsuite/gcc.target/i386/sse5-ima-vector.c

   1 /* Test that the compiler properly optimizes vector 32-bit integer point
   2    multiply and add instructions vector into pmacsdd on SSE5 systems.  */
   3
   4 /* { dg-do compile } */
   5 /* { dg-require-effective-target lp64 } */
   6 /* { dg-options "-O2 -msse5 -ftree-vectorize" } */
   7
   8 extern void exit (int);
   9
  10 typedef long long __m128i __attribute__ ((__vector_size__ (16), __may_alias__));
  11
  12 #define SIZE 10240
  13
  14 union {
  15   __m128i align;
  16   int i[SIZE];
  17 } a, b, c, d;
  18
  19 void
  20 int_mul_add (void)
  21 {
  22   int i;
  23
  24   for (i = 0; i < SIZE; i++)
  25     a.i[i] = (b.i[i] * c.i[i]) + d.i[i];
  26 }
  27
  28 int main ()
  29 {
  30   int_mul_add ();
  31   exit (0);
  32 }
  33
  34 /* { dg-final { scan-assembler "pmacsdd" } } */