forked from Lephenixnoir/gint
48 lines
892 B
C
48 lines
892 B
C
#ifndef _ENDIAN_H
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#define _ENDIAN_H
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#include <stdint.h>
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//---
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// Assembler-optimized byte-ordering functions.
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//---
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__attribute__((always_inline)) static inline uint16_t swap16(uint16_t word)
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{
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uint16_t result;
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__asm__("swap.b %1, %0": "=r"(result): "r"(word));
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return result;
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}
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__attribute__((always_inline)) static inline uint32_t swap32(uint32_t longw)
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{
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uint32_t result;
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__asm__(
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"swap.b %1, r0 \n\t"
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"swap.w r0, r0 \n\t"
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"swap.b r0, %0 \n\t"
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: "=r"(result)
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: "r"(longw)
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: "r0"
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);
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return result;
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}
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//---
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// Conversion of values of different endianness.
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//---
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#define htobe16(host16) (host16)
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#define htole16(host16) (swap16(host16))
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#define be16toh(be16) (be16)
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#define le16toh(le16) (swap16(le16))
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#define htobe32(host32) (host32)
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#define htole32(host32) (swap32(host32))
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#define be32toh(be32) (be32)
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#define le32toh(le32) (swap32(le32))
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#endif // _ENDIAN_H
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