gcc/testsuite/gcc.target/s390/insv-1.c

   1 /* { dg-do compile } */
   2 /* { dg-options "-O3 -march=z10 -mzarch" } */
   3
   4 unsigned long
   5 foo1 (unsigned long a, unsigned long b)
   6 {
   7   return (a << 5) | (b & (((1UL << 5) - 1)));
   8 }
   9
  10 /* This generates very different RTX than foo1.  The output reg (r2)
  11    matches the unshifted argument.  So it actually is a
  12    (set (zero_extract a 59 0) b) */
  13 unsigned long
  14 foo2 (unsigned long a, unsigned long b)
  15 {
  16   return (b << 5) | (a & (((1UL << 5) - 1)));
  17 }
  18
  19 /* risbg cannot be used when less bits are removed with the mask.  */
  20
  21 unsigned long
  22 foo1b (unsigned long a, unsigned long b)
  23 {
  24   return (a << 5) | (b & 1);
  25 }
  26
  27 unsigned long
  28 foo2b (unsigned long a, unsigned long b)
  29 {
  30   return (b << 5) | (a & 1);
  31 }
  32
  33 /* risbg cannot be used when the masked bits would end up in the
  34    result since a real OR is required then.  */
  35 unsigned long
  36 foo1c (unsigned long a, unsigned long b)
  37 {
  38   return (a << 5) | (b & 127);
  39 }
  40
  41 unsigned long
  42 foo2c (unsigned long a, unsigned long b)
  43 {
  44   return (b << 5) | (a & 127);
  45 }
  46
  47 unsigned long
  48 foo3 (unsigned long a, unsigned long b)
  49 {
  50 #ifdef __s390x__
  51   return (a << 5) | (b >> 59);
  52 #else
  53   return (a << 5) | (b >> 27);
  54 #endif
  55 }
  56
  57 unsigned long
  58 foo4 (unsigned long a, unsigned long b)
  59 {
  60 #ifdef __s390x__
  61   return (b << 5) | (a >> 59);
  62 #else
  63   return (b << 5) | (a >> 27);
  64 #endif
  65 }
  66
  67 /* risbg can be used also if there are some bits spared in the middle
  68    of the two chunks.  */
  69 unsigned long
  70 foo3b (unsigned long a, unsigned long b)
  71 {
  72 #ifdef __s390x__
  73   return (a << 6) | (b >> 59);
  74 #else
  75   return (a << 6) | (b >> 27);
  76 #endif
  77 }
  78
  79 unsigned long
  80 foo4b (unsigned long a, unsigned long b)
  81 {
  82 #ifdef __s390x__
  83   return (b << 6) | (a >> 59);
  84 #else
  85   return (b << 6) | (a >> 27);
  86 #endif
  87 }
  88
  89 /* One bit of overlap so better don't use risbg.  */
  90
  91 unsigned long
  92 foo3c (unsigned long a, unsigned long b)
  93 {
  94 #ifdef __s390x__
  95   return (a << 4) | (b >> 59);
  96 #else
  97   return (a << 4) | (b >> 27);
  98 #endif
  99 }
 100
 101 unsigned long
 102 foo4c (unsigned long a, unsigned long b)
 103 {
 104 #ifdef __s390x__
 105   return (b << 4) | (a >> 59);
 106 #else
 107   return (b << 4) | (a >> 27);
 108 #endif
 109 }
 110
 111 /* The functions foo3, foo4, foo3b, foo4b no longer use risbg but rosbg instead.
 112
 113    On 64 bit, four risbg go away and four new ones appear in other functions
 114      { dg-final { scan-assembler-times "risbg" 6 { target { lp64 } } } }
 115
 116    ... but not on 31 bit.
 117      { dg-final { scan-assembler-times "risbg" 2 { target { ! lp64 } } } }
 118 */