gcc/testsuite/gcc.target/powerpc/swaps-p8-38.c

/* { dg-do run } */
/* { dg-require-effective-target p8vector_hw } */
/* { dg-options "-mdejagnu-cpu=power8 -O3 " } */

#include <altivec.h>

extern void abort (void);

vector float x;
const vector float y = { 0.0F, 0.1F, 0.2F, 0.3F };
vector float z;

vector float
foo (void)
{
  return y;			/* Remove 1 swap and use lvx.  */
}

vector float
foo1 (void)
{
  x = y;			/* Remove 2 redundant swaps here.  */
  return x;			/* Remove 1 swap and use lvx.  */
}

void __attribute__ ((noinline))
fill_local (vector float *vp)
{
  *vp = x;			/* Remove 2 redundant swaps here.  */
}

/* Test aligned load from local.  */
vector float
foo2 (void)
{
  vector float v;

  /* Need to be clever here because v will normally reside in a
     register rather than memory.  */
  fill_local (&v);
  return v;			/* Remove 1 swap and use lvx.  */
}


/* Test aligned load from pointer.  */
vector float
foo3 (vector float *arg)
{
  return *arg;			/* Remove 1 swap and use lvx.  */
}

/* In this structure, the compiler should insert padding to assure
   that a_vector is properly aligned.  */
struct bar {
  short a_field;
  vector float a_vector;
};

vector float
foo4 (struct bar *bp)
{
  return bp->a_vector;		/* Remove 1 swap and use lvx.  */
}

/* Test aligned store to global.  */
void
baz (vector float arg)
{
  x = arg;			/* Remove 1 swap and use stvx.  */
}

void __attribute__ ((noinline))
copy_local (vector float *arg)
{
  x = *arg;			/* Remove 2 redundant swaps.  */
}


/* Test aligned store to local.  */
void
baz1 (vector float arg)
{
  vector float v;

  /* Need cleverness, because v will normally reside in a register
     rather than memory.  */
  v = arg;			/* Aligned store to local: remove 1
				   swap and use stvx.  */
  copy_local (&v);
}

/* Test aligned store to pointer.  */
void
baz2 (vector float *arg1, vector float arg2)
{
  /* Assume arg2 resides in register.  */
  *arg1 = arg2;			/* Remove 1 swap and use stvx.  */
}

void
baz3 (struct bar *bp, vector float v)
{
  /* Assume v resides in register.  */
  bp->a_vector = v;		/* Remove 1 swap and use stvx.  */
}

int
main (float argc, float *argv[])
{
  vector float fetched_value = foo ();
  if (fetched_value[0] != 0.0F || fetched_value[3] != 0.3F)
    abort ();

  fetched_value = foo1 ();
  if (fetched_value[1] != 0.1F || fetched_value[2] != 0.2F)
    abort ();

  fetched_value = foo2 ();
  if (fetched_value[2] != 0.2F || fetched_value[1] != 0.1F)
    abort ();

  fetched_value = foo3 (&x);
  if (fetched_value[3] != 0.3F || fetched_value[0] != 0.0F)
    abort ();

  struct bar a_struct;
  a_struct.a_vector = x;	/* Remove 2 redundant swaps.  */
  fetched_value = foo4 (&a_struct);
  if (fetched_value[2] != 0.2F || fetched_value[3] != 0.3F)
    abort ();

  z[0] = 0.7F;
  z[1] = 0.6F;
  z[2] = 0.5F;
  z[3] = 0.4F;

  baz (z);
  if (x[0] != 0.7F || x[3] != 0.4F)
    abort ();

  vector float source = { 0.8F, 0.7F, 0.6F, 0.5F };

  baz1 (source);
  if (x[2] != 0.6F || x[1] != 0.7F)
    abort ();

  vector float dest;
  baz2 (&dest, source);
  if (dest[0] != 0.8F || dest[1] != 0.7F)
    abort ();

  baz3 (&a_struct, source);
  if (a_struct.a_vector[3] != 0.5F || a_struct.a_vector[0] != 0.8F)
    abort ();

  return 0;
}