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endianness functions for unaligned memory accesses

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git-svn-id: svn://svn.savannah.nongnu.org/qemu/trunk@908 c046a42c-6fe2-441c-8c8c-71466251a162
This commit is contained in:
bellard 2004-06-07 20:43:57 +00:00
parent 4c8732d71b
commit eb26db16d7
1 changed files with 62 additions and 0 deletions
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62
vl.h
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@ -141,6 +141,68 @@ static inline uint16_t cpu_to_le16(uint16_t v)
}
#endif
static inline void cpu_to_le16w(uint16_t *p, uint16_t v)
{
*p = cpu_to_le16(v);
}
static inline void cpu_to_le32w(uint32_t *p, uint32_t v)
{
*p = cpu_to_le32(v);
}
static inline uint16_t le16_to_cpup(const uint16_t *p)
{
return le16_to_cpu(*p);
}
static inline uint32_t le32_to_cpup(const uint32_t *p)
{
return le32_to_cpu(*p);
}
/* unaligned versions (optimized for frequent unaligned accesses)*/
#if defined(__i386__) || defined(__powerpc__)
#define cpu_to_le16wu(p, v) cpu_to_le16w(p, v)
#define cpu_to_le32wu(p, v) cpu_to_le32w(p, v)
#define le16_to_cpupu(p) le16_to_cpup(p)
#define le32_to_cpupu(p) le32_to_cpup(p)
#else
static inline void cpu_to_le16wu(uint16_t *p, uint16_t v)
{
uint8_t *p1 = (uint8_t *)p;
p1[0] = v;
p1[1] = v >> 8;
}
static inline void cpu_to_le32wu(uint32_t *p, uint32_t v)
{
uint8_t *p1 = (uint8_t *)p;
p1[0] = v;
p1[1] = v >> 8;
p1[2] = v >> 16;
p1[3] = v >> 24;
}
static inline uint16_t le16_to_cpupu(const uint16_t *p)
{
const uint8_t *p1 = (const uint8_t *)p;
return p1[0] | (p1[1] << 8);
}
static inline uint32_t le32_to_cpupu(const uint32_t *p)
{
const uint8_t *p1 = (const uint8_t *)p;
return p1[0] | (p1[1] << 8) | (p1[2] << 16) | (p1[3] << 24);
}
#endif
/* vl.c */
extern int reset_requested;