1  /* Test case for SHIFT_COUNT_TRUNCATED on Loongson.  */
       2  
       3  /* { dg-do run { target { ! { mips*-mti-linux* mips*-img-linux* } } } } */
       4  /* loongson.h does not handle or check for MIPS16ness.  There doesn't
       5     seem any good reason for it to, given that the Loongson processors
       6     do not support MIPS16.  */
       7  /* { dg-options "-mloongson-mmi -mhard-float -mno-mips16 (REQUIRES_STDLIB)" } */
       8  /* See PR 52155.  */
       9  /* { dg-options "-mloongson-mmi -mhard-float -mno-mips16 -mlong64" { mips*-*-elf* && ilp32 } } */
      10  
      11  #include "loongson-mmiintrin.h"
      12  #include <assert.h>
      13  
      14  typedef union { int32x2_t v; int32_t a[2]; } int32x2_encap_t;
      15  
      16  void
      17  main1 (int shift)
      18  {
      19    int32x2_encap_t s;
      20    int32x2_encap_t r;
      21  
      22    s.a[0] = 0xffffffff;
      23    s.a[1] = 0xffffffff;
      24    /* Loongson SIMD use low-order 7 bits to specify the shift amount.
      25       Thus V2SI << 0x40 == 0.  The below expression 'shift & 0x3f' will be
      26       mis-optimized as 'shift', if SHIFT_COUNT_TRUNCATED is nonzero.  */
      27    r.v = psllw_s (s.v, (shift & 0x3f));
      28    assert (r.a[0] == 0xffffffff);
      29    assert (r.a[1] == 0xffffffff);
      30  }
      31  
      32  int
      33  main (void)
      34  {
      35    main1 (0x40);
      36    return 0;
      37  }