gcc/testsuite/gcc.target/i386/sse5-imul32widen-vector.c

   1 /* Test that the compiler properly optimizes floating point multiply and add
   2    instructions vector into pmacsdd/etc. 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 __m128i  __attribute__ ((__vector_size__ (16), __may_alias__));
  11
  12 #define SIZE 10240
  13
  14 union {
  15   __m128i i_align;
  16   int i32[SIZE];
  17   long i64[SIZE];
  18 } a, b, c, d;
  19
  20 void
  21 imul32_to_64 (void)
  22 {
  23   int i;
  24
  25   for (i = 0; i < SIZE; i++)
  26     a.i64[i] = ((long)b.i32[i]) * ((long)c.i32[i]);
  27 }
  28
  29 int main ()
  30 {
  31   imul32_to_64 ();
  32   exit (0);
  33 }
  34
  35 /* { dg-final { scan-assembler "pmacsdql" } } */
  36 /* { dg-final { scan-assembler "pmacsdqh" } } */