gcc/testsuite/gcc.target/powerpc/optimize-bswapdi-2.c

   1 /* { dg-require-effective-target stdint_types } */
   2 /* { dg-require-effective-target lp64 } */
   3 /* { dg-options "-O2 -mdejagnu-cpu=power5" } */
   4
   5 /* This is a clone of gcc-dg/optimize-bswapdi-1.c, redone to use load and stores
   6    to test whether lwbrx/stwbrx is generated for normal power systems.  */
   7
   8 #include <stdint.h>
   9 #define __const_swab64(x) ((uint64_t)(                                          \
  10         (((uint64_t)(x) & (uint64_t)0x00000000000000ffULL) << 56) |             \
  11         (((uint64_t)(x) & (uint64_t)0x000000000000ff00ULL) << 40) |             \
  12         (((uint64_t)(x) & (uint64_t)0x0000000000ff0000ULL) << 24) |             \
  13         (((uint64_t)(x) & (uint64_t)0x00000000ff000000ULL) <<  8) |             \
  14         (((uint64_t)(x) & (uint64_t)0x000000ff00000000ULL) >>  8) |             \
  15         (((uint64_t)(x) & (uint64_t)0x0000ff0000000000ULL) >> 24) |             \
  16         (((uint64_t)(x) & (uint64_t)0x00ff000000000000ULL) >> 40) |             \
  17         (((uint64_t)(x) & (uint64_t)0xff00000000000000ULL) >> 56)))
  18
  19
  20 /* This byte swap implementation is used by the Linux kernel and the
  21    GNU C library.  */
  22
  23 uint64_t
  24 swap64_load (uint64_t *in)
  25 {
  26   return __const_swab64 (*in);
  27 }
  28
  29 void
  30 swap64_store (uint64_t *out, uint64_t in)
  31 {
  32   *out = __const_swab64 (in);
  33 }
  34
  35 /* { dg-final { scan-assembler-times "lwbrx" 2 } } */
  36 /* { dg-final { scan-assembler-times "stwbrx" 2 } } */