1  /* { dg-do compile } */
       2  /* { dg-require-effective-target bswap } */
       3  /* { dg-require-effective-target stdint_types } */
       4  /* { dg-options "-O2 -fdump-tree-bswap" } */
       5  /* { dg-additional-options "-march=z900" { target s390-*-* } } */
       6  
       7  #include <stdint.h>
       8  
       9  unsigned char data[2];
      10  
      11  struct uint16_st {
      12    unsigned char u0, u1;
      13  };
      14  
      15  uint32_t read_le16_1 (void)
      16  {
      17    return data[0] | (data[1] << 8);
      18  }
      19  
      20  uint32_t read_le16_2 (struct uint16_st data)
      21  {
      22    return data.u0 | (data.u1 << 8);
      23  }
      24  
      25  uint32_t read_le16_3 (unsigned char *data)
      26  {
      27    return *data | (*(data + 1) << 8);
      28  }
      29  
      30  uint32_t read_be16_1 (void)
      31  {
      32    return data[1] | (data[0] << 8);
      33  }
      34  
      35  uint32_t read_be16_2 (struct uint16_st data)
      36  {
      37    return data.u1 | (data.u0 << 8);
      38  }
      39  
      40  uint32_t read_be16_3 (unsigned char *data)
      41  {
      42    return *(data + 1) | (*data << 8);
      43  }
      44  
      45  typedef int HItype __attribute__ ((mode (HI)));
      46  
      47  /* Test that detection of significant sign extension works correctly. This
      48     checks that unknown byte markers are set correctly in cast of cast.  */
      49  
      50  HItype
      51  swap16 (HItype in)
      52  {
      53    return (HItype) (((in >> 0) & 0xFF) << 8)
      54  		| (((in >> 8) & 0xFF) << 0);
      55  }
      56  
      57  unsigned short
      58  get_unaligned_16_le (unsigned char *p)
      59  {
      60    return p[0] | (p[1] << 8);
      61  }
      62  
      63  unsigned short
      64  get_unaligned_16_be (unsigned char *p)
      65  {
      66    return p[1] | (p[0] << 8);
      67  }
      68  
      69  
      70  /* { dg-final { scan-tree-dump-times "16 bit load in target endianness found at" 4 "bswap" } } */
      71  /* { dg-final { scan-tree-dump-times "16 bit bswap implementation found at" 4 "bswap" } } */