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Add 64-bit byte-swapping operations.

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This commit is contained in:
Michael Brown 2006-05-13 11:40:39 +00:00
parent 5009f8d6a2
commit 1ad72e0e79
4 changed files with 48 additions and 7 deletions
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45
src/arch/i386/include/bits/byteswap.h
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@ -1,7 +1,8 @@
#ifndef ETHERBOOT_BITS_BYTESWAP_H
#define ETHERBOOT_BITS_BYTESWAP_H
static inline uint16_t __i386_bswap_16(uint16_t x)
static inline __attribute__ ((always_inline)) uint16_t
__i386_bswap_16(uint16_t x)
{
__asm__("xchgb %b0,%h0\n\t"
: "=q" (x)
@ -9,7 +10,8 @@ static inline uint16_t __i386_bswap_16(uint16_t x)
return x;
}
static inline uint32_t __i386_bswap_32(uint32_t x)
static inline __attribute__ ((always_inline)) uint32_t
__i386_bswap_32(uint32_t x)
{
__asm__("xchgb %b0,%h0\n\t"
"rorl $16,%0\n\t"
@ -19,27 +21,56 @@ static inline uint32_t __i386_bswap_32(uint32_t x)
return x;
}
static inline __attribute__ ((always_inline)) uint64_t
__i386_bswap_64(uint64_t x)
{
union {
uint64_t qword;
uint32_t dword[2];
} u;
u.qword = x;
u.dword[0] = __i386_bswap_32(u.dword[0]);
u.dword[1] = __i386_bswap_32(u.dword[1]);
__asm__("xchgl %0,%1"
: "=r" ( u.dword[0] ), "=r" ( u.dword[1] )
: "0" ( u.dword[0] ), "1" ( u.dword[1] ) );
return u.qword;
}
#define __bswap_constant_16(x) \
((uint16_t)((((uint16_t)(x) & 0x00ff) << 8) | \
(((uint16_t)(x) & 0xff00) >> 8)))
(((uint16_t)(x) & 0xff00) >> 8)))
#define __bswap_constant_32(x) \
((uint32_t)((((uint32_t)(x) & 0x000000ffU) << 24) | \
(((uint32_t)(x) & 0x0000ff00U) << 8) | \
(((uint32_t)(x) & 0x00ff0000U) >> 8) | \
(((uint32_t)(x) & 0xff000000U) >> 24)))
(((uint32_t)(x) & 0x0000ff00U) << 8) | \
(((uint32_t)(x) & 0x00ff0000U) >> 8) | \
(((uint32_t)(x) & 0xff000000U) >> 24)))
#define __bswap_constant_64(x) \
((uint64_t)((((uint64_t)(x) & 0x00000000000000ffULL) << 56) | \
(((uint64_t)(x) & 0x000000000000ff00ULL) << 40) | \
(((uint64_t)(x) & 0x0000000000ff0000ULL) << 24) | \
(((uint64_t)(x) & 0x00000000ff000000ULL) << 8) | \
(((uint64_t)(x) & 0x000000ff00000000ULL) >> 8) | \
(((uint64_t)(x) & 0x0000ff0000000000ULL) >> 24) | \
(((uint64_t)(x) & 0x00ff000000000000ULL) >> 40) | \
(((uint64_t)(x) & 0xff00000000000000ULL) >> 56)))
#define __bswap_16(x) \
((uint16_t)(__builtin_constant_p(x) ? \
__bswap_constant_16(x) : \
__i386_bswap_16(x)))
#define __bswap_32(x) \
((uint32_t)(__builtin_constant_p(x) ? \
__bswap_constant_32(x) : \
__i386_bswap_32(x)))
#define __bswap_64(x) \
((uint64_t)(__builtin_constant_p(x) ? \
__bswap_constant_64(x) : \
__i386_bswap_64(x)))
#endif /* ETHERBOOT_BITS_BYTESWAP_H */

4
src/include/big_bswap.h
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@ -5,12 +5,16 @@
#define htonl(x) (x)
#define ntohs(x) (x)
#define htons(x) (x)
#define cpu_to_le64(x) __bswap_64(x)
#define cpu_to_le32(x) __bswap_32(x)
#define cpu_to_le16(x) __bswap_16(x)
#define cpu_to_be64(x) (x)
#define cpu_to_be32(x) (x)
#define cpu_to_be16(x) (x)
#define le64_to_cpu(x) __bswap_64(x)
#define le32_to_cpu(x) __bswap_32(x)
#define le16_to_cpu(x) __bswap_16(x)
#define be64_to_cpu(x) (x)
#define be32_to_cpu(x) (x)
#define be16_to_cpu(x) (x)

2
src/include/byteswap.h
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@ -12,8 +12,10 @@
#endif
/* Make routines available to all */
#define swap64(x) __bswap_64(x)
#define swap32(x) __bswap_32(x)
#define swap16(x) __bswap_16(x)
#define bswap_64(x) __bswap_64(x)
#define bswap_32(x) __bswap_32(x)
#define bswap_16(x) __bswap_16(x)

4
src/include/little_bswap.h
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@ -5,12 +5,16 @@
#define htonl(x) __bswap_32(x)
#define ntohs(x) __bswap_16(x)
#define htons(x) __bswap_16(x)
#define cpu_to_le64(x) (x)
#define cpu_to_le32(x) (x)
#define cpu_to_le16(x) (x)
#define cpu_to_be64(x) __bswap_64(x)
#define cpu_to_be32(x) __bswap_32(x)
#define cpu_to_be16(x) __bswap_16(x)
#define le64_to_cpu(x) (x)
#define le32_to_cpu(x) (x)
#define le16_to_cpu(x) (x)
#define be64_to_cpu(x) __bswap_64(x)
#define be32_to_cpu(x) __bswap_32(x)
#define be16_to_cpu(x) __bswap_16(x)