embedded-5_0-branch/gcc/testsuite/gcc.target/powerpc/optimize-bswapdi-2.c

   1 /* { dg-require-effective-target stdint_types } */
   2 /* { dg-require-effective-target lp64 } */
   3 /* { dg-skip-if "do not override -mcpu" { powerpc*-*-* } { "-mcpu=*" } { "-mcpu=power5" } } */
   4 /* { dg-options "-O2 -mcpu=power5" } */
   5
   6 /* This is a clone of gcc-dg/optimize-bswapdi-1.c, redone to use load and stores
   7    to test whether lwbrx/stwbrx is generated for normal power systems.  */
   8
   9 #include <stdint.h>
  10 #define __const_swab64(x) ((uint64_t)(                                          \
  11         (((uint64_t)(x) & (uint64_t)0x00000000000000ffULL) << 56) |             \
  12         (((uint64_t)(x) & (uint64_t)0x000000000000ff00ULL) << 40) |             \
  13         (((uint64_t)(x) & (uint64_t)0x0000000000ff0000ULL) << 24) |             \
  14         (((uint64_t)(x) & (uint64_t)0x00000000ff000000ULL) <<  8) |             \
  15         (((uint64_t)(x) & (uint64_t)0x000000ff00000000ULL) >>  8) |             \
  16         (((uint64_t)(x) & (uint64_t)0x0000ff0000000000ULL) >> 24) |             \
  17         (((uint64_t)(x) & (uint64_t)0x00ff000000000000ULL) >> 40) |             \
  18         (((uint64_t)(x) & (uint64_t)0xff00000000000000ULL) >> 56)))
  19
  20
  21 /* This byte swap implementation is used by the Linux kernel and the
  22    GNU C library.  */
  23
  24 uint64_t
  25 swap64_load (uint64_t *in)
  26 {
  27   return __const_swab64 (*in);
  28 }
  29
  30 void
  31 swap64_store (uint64_t *out, uint64_t in)
  32 {
  33   *out = __const_swab64 (in);
  34 }
  35
  36 /* { dg-final { scan-assembler-times "lwbrx" 2 } } */
  37 /* { dg-final { scan-assembler-times "stwbrx" 2 } } */