gcc/testsuite/gcc.target/aarch64/sisd-shft-neg_1.c

   1 /* { dg-do run } */
   2 /* { dg-options "-O2 -fno-inline" } */
   3
   4 extern void abort (void);
   5
   6 #define force_simd_si(v) asm volatile ("mov %s0, %1.s[0]" :"=w" (v) :"w" (v) :)
   7
   8 unsigned int
   9 shft_add (unsigned int a, unsigned int b)
  10 {
  11   unsigned int c;
  12
  13   force_simd_si (a);
  14   force_simd_si (b);
  15   c = a >> b;
  16   force_simd_si (c);
  17
  18   return c + b;
  19 }
  20
  21 int
  22 main (void)
  23 {
  24   unsigned int i = 0;
  25   unsigned int a = 0xdeadbeef;
  26
  27   for (i = 0; i < 32; i++)
  28   {
  29     unsigned int exp = (a / (1 << i) + i);
  30     unsigned int got = shft_add (a, i);
  31
  32     if (exp != got)
  33       abort ();
  34   }
  35
  36   return 0;
  37 }
  38