gcc/testsuite/gcc.target/powerpc/swaps-p8-33.c

   1 /* { dg-do compile } */
   2 /* { dg-options "-mdejagnu-cpu=power8 -mvsx -O3 " } */
   3 /* { dg-require-effective-target powerpc_vsx } */
   4
   5 /* Previous versions of this test required that the assembler does not
   6    contain xxpermdi or xxswapd.  However, with the more sophisticated
   7    code generation used today, it is now possible that xxpermdi (aka
   8    xxswapd) show up without being part of a lxvd2x or stxvd2x
   9    sequence.  */
  10
  11 #include <altivec.h>
  12
  13 extern void abort (void);
  14
  15 vector short x;
  16 const vector short y = { 0, 1, 2, 3, 4, 5, 6, 7 };
  17 vector short z;
  18
  19 vector short
  20 foo (void)
  21 {
  22   return y;                     /* Remove 1 swap and use lvx.  */
  23 }
  24
  25 vector short
  26 foo1 (void)
  27 {
  28   x = y;                        /* Remove 2 redundant swaps here.  */
  29   return x;                     /* Remove 1 swap and use lvx.  */
  30 }
  31
  32 void __attribute__ ((noinline))
  33 fill_local (vector short *vp)
  34 {
  35   *vp = x;                      /* Remove 2 redundant swaps here.  */
  36 }
  37
  38 /* Test aligned load from local.  */
  39 vector short
  40 foo2 (void)
  41 {
  42   vector short v;
  43
  44   /* Need to be clever here because v will normally reside in a
  45      register rather than memory.  */
  46   fill_local (&v);
  47   return v;                     /* Remove 1 swap and use lvx.  */
  48 }
  49
  50
  51 /* Test aligned load from pointer.  */
  52 vector short
  53 foo3 (vector short *arg)
  54 {
  55   return *arg;                  /* Remove 1 swap and use lvx.  */
  56 }
  57
  58 /* In this structure, the compiler should insert padding to assure
  59    that a_vector is properly aligned.  */
  60 struct bar {
  61   short a_field;
  62   vector short a_vector;
  63 };
  64
  65 vector short
  66 foo4 (struct bar *bp)
  67 {
  68   return bp->a_vector;          /* Remove 1 swap and use lvx.  */
  69 }
  70
  71 /* Test aligned store to global.  */
  72 void
  73 baz (vector short arg)
  74 {
  75   x = arg;                      /* Remove 1 swap and use stvx.  */
  76 }
  77
  78 void __attribute__ ((noinline))
  79 copy_local (vector short *arg)
  80 {
  81   x = *arg;                     /* Remove 2 redundant swaps.  */
  82 }
  83
  84
  85 /* Test aligned store to local.  */
  86 void
  87 baz1 (vector short arg)
  88 {
  89   vector short v;
  90
  91   /* Need cleverness, because v will normally reside in a register
  92      rather than memory.  */
  93   v = arg;                      /* Aligned store to local: remove 1
  94                                    swap and use stvx.  */
  95   copy_local (&v);
  96 }
  97
  98 /* Test aligned store to pointer.  */
  99 void
 100 baz2 (vector short *arg1, vector short arg2)
 101 {
 102   /* Assume arg2 resides in register.  */
 103   *arg1 = arg2;                 /* Remove 1 swap and use stvx.  */
 104 }
 105
 106 void
 107 baz3 (struct bar *bp, vector short v)
 108 {
 109   /* Assume v resides in register.  */
 110   bp->a_vector = v;             /* Remove 1 swap and use stvx.  */
 111 }
 112
 113 int
 114 main (int argc, short *argv[])
 115 {
 116   vector short fetched_value = foo ();
 117   if (fetched_value[0] != 0 || fetched_value[7] != 7)
 118     abort ();
 119
 120   fetched_value = foo1 ();
 121   if (fetched_value[1] != 1 || fetched_value[6] != 6)
 122     abort ();
 123
 124   fetched_value = foo2 ();
 125   if (fetched_value[2] != 2 || fetched_value[5] != 5)
 126     abort ();
 127
 128   fetched_value = foo3 (&x);
 129   if (fetched_value[3] != 3 || fetched_value[4] != 4)
 130     abort ();
 131
 132   struct bar a_struct;
 133   a_struct.a_vector = x;        /* Remove 2 redundant swaps.  */
 134   fetched_value = foo4 (&a_struct);
 135   if (fetched_value[4] != 4 || fetched_value[3] != 3)
 136     abort ();
 137
 138   for (int i = 0; i < 8; i++)
 139     z[i] = 7 - i;
 140
 141   baz (z);
 142   if (x[0] != 7 || x[7] != 0)
 143     abort ();
 144
 145   vector short source = { 8, 7, 6, 5, 4, 3, 2, 1 };
 146
 147   baz1 (source);
 148   if (x[3] != 5 || x[7] != 1)
 149     abort ();
 150
 151   vector short dest;
 152   baz2 (&dest, source);
 153   if (dest[4] != 4 || dest[1] != 7)
 154     abort ();
 155
 156   baz3 (&a_struct, source);
 157   if (a_struct.a_vector[7] != 1 || a_struct.a_vector[5] != 3)
 158     abort ();
 159
 160   return 0;
 161 }