gcc/testsuite/gcc.target/aarch64/subs1.c

/* { dg-do run } */
/* { dg-options "-O2 --save-temps -fno-inline" } */

extern void abort (void);

int
subs_si_test1 (int a, int b, int c)
{
  int d = a - c;

  /* { dg-final { scan-assembler "subs\tw\[0-9\]+, w\[0-9\]+, w\[0-9\]+" } } */
  if (d == 0)
    return a + c;
  else
    return d;
}

int
subs_si_test2 (int a, int b, int c)
{
  int d = a - 0xff;

  /* { dg-final { scan-assembler "subs\tw\[0-9\]+, w\[0-9\]+, #255" } } */
  if (d == 0)
    return a + c;
  else
    return d;
}

int
subs_si_test3 (int a, int b, int c)
{
  int d = a - (b << 3);

  /* { dg-final { scan-assembler "subs\tw\[0-9\]+, w\[0-9\]+, w\[0-9\]+, lsl 3" } } */
  if (d == 0)
    return a + c;
  else
    return d;
}

typedef long long s64;

s64
subs_di_test1 (s64 a, s64 b, s64 c)
{
  s64 d = a - c;

  /* { dg-final { scan-assembler "subs\tx\[0-9\]+, x\[0-9\]+, x\[0-9\]+" } } */
  if (d == 0)
    return a + c;
  else
    return d;
}

s64
subs_di_test2 (s64 a, s64 b, s64 c)
{
  s64 d = a - 0xff;

  /* { dg-final { scan-assembler "subs\tx\[0-9\]+, x\[0-9\]+, #255" } } */
  if (d == 0)
    return a + c;
  else
    return d;
}

s64
subs_di_test3 (s64 a, s64 b, s64 c)
{
  s64 d = a - (b << 3);

  /* { dg-final { scan-assembler "subs\tx\[0-9\]+, x\[0-9\]+, x\[0-9\]+, lsl 3" } } */
  if (d == 0)
    return a + c;
  else
    return d;
}

int main ()
{
  int x;
  s64 y;

  x = subs_si_test1 (29, 4, 5);
  if (x != 24)
    abort ();

  x = subs_si_test1 (20, 2, 20);
  if (x != 40)
    abort ();

   x = subs_si_test2 (0xff, 4, 5);
   if (x != (0xff + 5))
     abort ();

   x = subs_si_test2 (1024, 2, 20);
   if (x != (1024 - 0xff))
     abort ();

  x = subs_si_test3 (35, 4, 5);
  if (x != 35 - (4 << 3))
    abort ();

  x = subs_si_test3 (5 << 3, 5, 20);
  if (x != (20 + (5 << 3)))
    abort ();

  y = subs_di_test1 (0x130000029ll,
		     0x320000004ll,
		     0x505050505ll);

  if (y != (0x130000029ll - 0x505050505ll))
    abort ();

  y = subs_di_test1 (0x5000500050005ll,
		     0x2111211121112ll,
		     0x5000500050005ll);
  if (y != (0x5000500050005ll + 0x5000500050005ll))
    abort ();

  y = subs_di_test2 (0x130000029ll,
		     0x320000004ll,
		     0x505050505ll);
  if (y != (0x130000029ll - 0xff))
    abort ();

  y = subs_di_test2 (0xff,
		     0x320000004ll,
		     0x505050505ll);
  if (y != (0xff + 0x505050505ll))
    abort ();

  y = subs_di_test3 (0x130000029ll,
		     0x064000008ll,
		     0x505050505ll);
  if (y != (0x130000029ll - (0x064000008ll << 3)))
    abort ();

  y = subs_di_test3 (0x130002900ll << 3,
		     0x130002900ll,
		     0x505050505ll);
  if (y != (0x505050505ll + (0x130002900ll << 3)))
    abort ();

  return 0;
}