Viewing file:  optimize-bswapdi-2.c (1.23 KB) -rw-r--r--
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/* { dg-require-effective-target stdint_types } */
/* { dg-require-effective-target lp64 } */
/* { dg-options "-O2 -mdejagnu-cpu=power5" } */
/* This is a clone of gcc-dg/optimize-bswapdi-1.c, redone to use load and stores
to test whether lwbrx/stwbrx is generated for normal power systems. */
#include <stdint.h>
#define __const_swab64(x) ((uint64_t)( \
(((uint64_t)(x) & (uint64_t)0x00000000000000ffULL) << 56) | \
(((uint64_t)(x) & (uint64_t)0x000000000000ff00ULL) << 40) | \
(((uint64_t)(x) & (uint64_t)0x0000000000ff0000ULL) << 24) | \
(((uint64_t)(x) & (uint64_t)0x00000000ff000000ULL) << 8) | \
(((uint64_t)(x) & (uint64_t)0x000000ff00000000ULL) >> 8) | \
(((uint64_t)(x) & (uint64_t)0x0000ff0000000000ULL) >> 24) | \
(((uint64_t)(x) & (uint64_t)0x00ff000000000000ULL) >> 40) | \
(((uint64_t)(x) & (uint64_t)0xff00000000000000ULL) >> 56)))
/* This byte swap implementation is used by the Linux kernel and the
GNU C library. */
uint64_t
swap64_load (uint64_t *in)
{
return __const_swab64 (*in);
}
void
swap64_store (uint64_t *out, uint64_t in)
{
*out = __const_swab64 (in);
}
/* { dg-final { scan-assembler-times "lwbrx" 2 } } */
/* { dg-final { scan-assembler-times "stwbrx" 2 } } */
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