Viewing file:  optimize-bswapsi-2.c (1.35 KB) -rw-r--r--
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/* { dg-require-effective-target stdint_types } */
/* { dg-options "-O2 -mdejagnu-cpu=power5" } */
#include <stdint.h>
/* This is a clone of gcc-dg/optimize-bswapsi-1.c, redone to use load and stores
to test whether lwbrx/stwbrx is generated for normal power systems. */
#define __const_swab32(x) ((uint32_t)( \
(((uint32_t)(x) & (uint32_t)0x000000ffUL) << 24) | \
(((uint32_t)(x) & (uint32_t)0x0000ff00UL) << 8) | \
(((uint32_t)(x) & (uint32_t)0x00ff0000UL) >> 8) | \
(((uint32_t)(x) & (uint32_t)0xff000000UL) >> 24)))
/* This byte swap implementation is used by the Linux kernel and the
GNU C library. */
uint32_t
swap32_a_load (uint32_t *in)
{
return __const_swab32 (*in);
}
/* The OpenSSH byte swap implementation. */
uint32_t
swap32_b_load (uint32_t *in)
{
uint32_t a;
a = (*in << 16) | (*in >> 16);
a = ((a & 0x00ff00ff) << 8) | ((a & 0xff00ff00) >> 8);
return a;
}
void
swap32_a_store (uint32_t *out, uint32_t in)
{
*out = __const_swab32 (in);
}
/* The OpenSSH byte swap implementation. */
void
swap32_b_store (uint32_t *out, uint32_t in)
{
uint32_t a;
a = (in << 16) | (in >> 16);
a = ((a & 0x00ff00ff) << 8) | ((a & 0xff00ff00) >> 8);
*out = a;
}
/* { dg-final { scan-assembler-times "lwbrx" 2 } } */
/* { dg-final { scan-assembler-times "stwbrx" 2 } } */
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