andreacavalli/xserver-multidpi
1
0
Fork 0
Code Issues Pull Requests Projects Releases Wiki Activity

xfree86: Unspecialize gcc variants of unaligned memory access

Browse Source 
Yes yes, very clever, memmove works fine on gcc too, let's just do the
portable thing since none of this is performance code.

Reviewed-by: Julien Cristau <jcristau@debian.org>
Signed-off-by: Adam Jackson <ajax@redhat.com>
Signed-off-by: Keith Packard <keithp@keithp.com>
This commit is contained in:
Adam Jackson 2014-07-22 10:58:57 -04:00 committed by Keith Packard
parent e03c902e03
commit da2b267186
1 changed files with 0 additions and 69 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

69
hw/xfree86/common/compiler.h
View File

@ -238,73 +238,6 @@ extern unsigned short ldw_brx(volatile unsigned char *, int);
#define write_mem_barrier() /* NOP */
#endif
#ifdef __GNUC__
/* Define some packed structures to use with unaligned accesses */
struct __una_u64 {
uint64_t x __attribute__ ((packed));
};
struct __una_u32 {
uint32_t x __attribute__ ((packed));
};
struct __una_u16 {
uint16_t x __attribute__ ((packed));
};
/* Elemental unaligned loads */
static __inline__ uint64_t
ldq_u(uint64_t * p)
{
const struct __una_u64 *ptr = (const struct __una_u64 *) p;
return ptr->x;
}
static __inline__ uint32_t
ldl_u(uint32_t * p)
{
const struct __una_u32 *ptr = (const struct __una_u32 *) p;
return ptr->x;
}
static __inline__ uint16_t
ldw_u(uint16_t * p)
{
const struct __una_u16 *ptr = (const struct __una_u16 *) p;
return ptr->x;
}
/* Elemental unaligned stores */
static __inline__ void
stq_u(uint64_t val, uint64_t * p)
{
struct __una_u64 *ptr = (struct __una_u64 *) p;
ptr->x = val;
}
static __inline__ void
stl_u(uint32_t val, uint32_t * p)
{
struct __una_u32 *ptr = (struct __una_u32 *) p;
ptr->x = val;
}
static __inline__ void
stw_u(uint16_t val, uint16_t * p)
{
struct __una_u16 *ptr = (struct __una_u16 *) p;
ptr->x = val;
}
#else /* !__GNUC__ */
#include <string.h> /* needed for memmove */
static __inline__ uint64_t
@ -358,8 +291,6 @@ stw_u(uint16_t val, uint16_t * p)
memmove(p, &tmp, sizeof(*p));
}
#endif /* __GNUC__ */
#ifdef __GNUC__
#if (defined(linux) || defined(__FreeBSD__) || defined(__NetBSD__) || defined(__OpenBSD__)) && (defined(__alpha__))