72 lines
1.6 KiB
C
72 lines
1.6 KiB
C
#ifndef __BYTEORDER_H
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#define __BYTEORDER_H
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#include "types.h" // u32
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static inline u16 __swab16_constant(u16 val) {
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return (val<<8) | (val>>8);
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}
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static inline u32 __swab32_constant(u32 val) {
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return (val<<24) | ((val&0xff00)<<8) | ((val&0xff0000)>>8) | (val>>24);
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}
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static inline u64 __swab64_constant(u64 val) {
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return ((u64)__swab32_constant(val) << 32) | __swab32_constant(val>>32);
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}
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static inline u32 __swab32(u32 val) {
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asm("bswapl %0" : "+r"(val));
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return val;
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}
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static inline u64 __swab64(u64 val) {
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union u64_u32_u i, o;
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i.val = val;
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o.lo = __swab32(i.hi);
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o.hi = __swab32(i.lo);
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return o.val;
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}
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#define swab16(x) __swab16_constant(x)
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#define swab32(x) (__builtin_constant_p((u32)(x)) \
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? __swab32_constant(x) : __swab32(x))
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#define swab64(x) (__builtin_constant_p((u64)(x)) \
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? __swab64_constant(x) : __swab64(x))
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static inline u16 cpu_to_le16(u16 x) {
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return x;
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}
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static inline u32 cpu_to_le32(u32 x) {
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return x;
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}
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static inline u64 cpu_to_le64(u64 x) {
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return x;
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}
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static inline u16 le16_to_cpu(u16 x) {
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return x;
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}
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static inline u32 le32_to_cpu(u32 x) {
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return x;
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}
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static inline u64 le64_to_cpu(u64 x) {
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return x;
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}
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static inline u16 cpu_to_be16(u16 x) {
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return swab16(x);
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}
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static inline u32 cpu_to_be32(u32 x) {
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return swab32(x);
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}
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static inline u64 cpu_to_be64(u64 x) {
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return swab64(x);
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}
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static inline u16 be16_to_cpu(u16 x) {
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return swab16(x);
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}
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static inline u32 be32_to_cpu(u32 x) {
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return swab32(x);
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}
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static inline u64 be64_to_cpu(u64 x) {
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return swab64(x);
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}
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#endif // byteorder.h
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