gcc/testsuite/gcc.target/i386/xop-imul64-vector.c

   1 /* Test that the compiler properly optimizes floating point multiply and add
   2    instructions vector into pmacsdd/etc. on XOP systems.  */
   3
   4 /* { dg-do compile } */
   5 /* { dg-require-effective-target lp64 } */
   6 /* { dg-options "-O2 -mxop -mno-avx2 -ftree-vectorize -fno-vect-cost-model" } */
   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   long i64[SIZE];
  17 } a, b, c, d;
  18
  19 void
  20 imul64 (void)
  21 {
  22   int i;
  23
  24   for (i = 0; i < SIZE; i++)
  25     a.i64[i] = b.i64[i] * c.i64[i];
  26 }
  27
  28 int main ()
  29 {
  30   imul64 ();
  31   exit (0);
  32 }
  33
  34 /* { dg-final { scan-assembler "vpmulld" } } */
  35 /* { dg-final { scan-assembler "vphadddq" } } */