mirror of
https://github.com/grub4dos/ntloader.git
synced 2025-05-09 04:01:08 +08:00
4512426e9a
* import wimboot v28 * remove -Wno-array-bounds * addd * reg * cmline * charset * update bcd.bat * reg prefix * fix * bcd * rootfs * fsuuid * vdisk * partmap * biosdisk * efidisk * efi * fix * fix * fix reg * fix bcd * bcd * initrd * payload
255 lines
6.8 KiB
C
255 lines
6.8 KiB
C
#ifndef _BITS_BYTESWAP_H
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#define _BITS_BYTESWAP_H
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/** @file
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*
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* Byte-order swapping functions
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*
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*/
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#include <stdint.h>
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/*****************************************************************************
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*
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* x86 functions
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*
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*****************************************************************************
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*/
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#if defined(__i386__) || defined(__x86_64__)
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static inline __attribute__ ((always_inline, const)) uint16_t
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__bswap_variable_16 (uint16_t x)
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{
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__asm__ ("xchgb %b0,%h0" : "=Q" (x) : "0" (x));
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return x;
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}
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static inline __attribute__ ((always_inline)) void
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__bswap_16s (uint16_t *x)
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{
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__asm__ ("rorw $8, %0" : "+m" (*x));
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}
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static inline __attribute__ ((always_inline, const)) uint32_t
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__bswap_variable_32 (uint32_t x)
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{
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__asm__ ("bswapl %k0" : "=r" (x) : "0" (x));
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return x;
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}
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static inline __attribute__ ((always_inline)) void
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__bswap_32s (uint32_t *x)
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{
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__asm__ ("bswapl %k0" : "=r" (*x) : "0" (*x));
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}
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#if defined(__x86_64__)
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static inline __attribute__ ((always_inline, const)) uint64_t
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__bswap_variable_64 (uint64_t x)
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{
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__asm__ ("bswapq %q0" : "=r" (x) : "0" (x));
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return x;
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}
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#else /* __x86_64__ */
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static inline __attribute__ ((always_inline, const)) uint64_t
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__bswap_variable_64 (uint64_t x)
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{
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uint32_t in_high = (x >> 32);
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uint32_t in_low = (x & 0xffffffffUL);
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uint32_t out_high;
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uint32_t out_low;
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__asm__ ("bswapl %0\n\t"
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"bswapl %1\n\t"
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"xchgl %0,%1\n\t"
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: "=r" (out_high), "=r" (out_low)
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: "0" (in_high), "1" (in_low));
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return ((((uint64_t) out_high) << 32) | ((uint64_t) out_low));
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}
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#endif /* __x86_64__ */
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static inline __attribute__ ((always_inline)) void
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__bswap_64s (uint64_t *x)
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{
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*x = __bswap_variable_64 (*x);
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}
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/*****************************************************************************
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*
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* AArch64 functions
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*
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*****************************************************************************
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*/
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#elif defined(__aarch64__)
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static inline __attribute__ ((always_inline, const)) uint16_t
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__bswap_variable_16 (uint16_t x)
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{
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__asm__ ("rev16 %x0, %x1" : "=r" (x) : "r" (x));
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return x;
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}
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static inline __attribute__ ((always_inline)) void
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__bswap_16s (uint16_t *x)
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{
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*x = __bswap_variable_16 (*x);
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}
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static inline __attribute__ ((always_inline, const)) uint32_t
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__bswap_variable_32 (uint32_t x)
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{
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__asm__ ("rev32 %x0, %x1" : "=r" (x) : "r" (x));
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return x;
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}
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static inline __attribute__ ((always_inline)) void
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__bswap_32s (uint32_t *x)
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{
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*x = __bswap_variable_32 (*x);
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}
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static inline __attribute__ ((always_inline, const)) uint64_t
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__bswap_variable_64 (uint64_t x)
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{
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__asm__ ("rev %0, %1" : "=r" (x) : "r" (x));
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return x;
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}
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static inline __attribute__ ((always_inline)) void
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__bswap_64s (uint64_t *x)
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{
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*x = __bswap_variable_64 (*x);
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}
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#endif
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/*****************************************************************************
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*
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* Generic functions
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*
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*****************************************************************************
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*/
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/**
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* Byte-swap a 16-bit constant
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*
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* @v value Constant value
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* @ret swapped Byte-swapped value
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*/
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#define __bswap_constant_16(value) \
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((((value) & 0x00ff) << 8) | (((value) & 0xff00) >> 8))
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/**
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* Byte-swap a 32-bit constant
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*
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* @v value Constant value
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* @ret swapped Byte-swapped value
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*/
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#define __bswap_constant_32(value) \
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((((value) & 0x000000ffUL) << 24) | \
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(((value) & 0x0000ff00UL) << 8) | \
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(((value) & 0x00ff0000UL) >> 8) | \
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(((value) & 0xff000000UL) >> 24))
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/**
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* Byte-swap a 64-bit constant
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*
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* @v value Constant value
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* @ret swapped Byte-swapped value
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*/
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#define __bswap_constant_64(value) \
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((((value) & 0x00000000000000ffULL) << 56) | \
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(((value) & 0x000000000000ff00ULL) << 40) | \
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(((value) & 0x0000000000ff0000ULL) << 24) | \
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(((value) & 0x00000000ff000000ULL) << 8) | \
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(((value) & 0x000000ff00000000ULL) >> 8) | \
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(((value) & 0x0000ff0000000000ULL) >> 24) | \
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(((value) & 0x00ff000000000000ULL) >> 40) | \
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(((value) & 0xff00000000000000ULL) >> 56))
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/**
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* Byte-swap a 16-bit value
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*
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* @v value Value
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* @ret swapped Byte-swapped value
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*/
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#define __bswap_16(value) \
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(__builtin_constant_p (value) ? \
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((uint16_t) __bswap_constant_16 ((uint16_t) (value))) \
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: __bswap_variable_16 (value))
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#define bswap_16(value) __bswap_16 (value)
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/**
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* Byte-swap a 32-bit value
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*
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* @v value Value
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* @ret swapped Byte-swapped value
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*/
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#define __bswap_32(value) \
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(__builtin_constant_p (value) ? \
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((uint32_t) __bswap_constant_32 ((uint32_t) (value))) \
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: __bswap_variable_32 (value))
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#define bswap_32(value) __bswap_32 (value)
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/**
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* Byte-swap a 64-bit value
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*
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* @v value Value
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* @ret swapped Byte-swapped value
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*/
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#define __bswap_64(value) \
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(__builtin_constant_p (value) ? \
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((uint64_t) __bswap_constant_64 ((uint64_t) (value))) \
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: __bswap_variable_64 (value))
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#define bswap_64(value) __bswap_64 (value)
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#define __cpu_to_leNN(bits, value) (value)
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#define __cpu_to_beNN(bits, value) __bswap_ ## bits (value)
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#define __leNN_to_cpu(bits, value) (value)
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#define __beNN_to_cpu(bits, value) __bswap_ ## bits (value)
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#define __cpu_to_leNNs(bits, ptr) do { } while (0)
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#define __cpu_to_beNNs(bits, ptr) __bswap_ ## bits ## s (ptr)
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#define __leNN_to_cpus(bits, ptr) do { } while (0)
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#define __beNN_to_cpus(bits, ptr) __bswap_ ## bits ## s (ptr)
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#define cpu_to_le16(value) __cpu_to_leNN (16, value)
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#define cpu_to_le32(value) __cpu_to_leNN (32, value)
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#define cpu_to_le64(value) __cpu_to_leNN (64, value)
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#define cpu_to_be16(value) __cpu_to_beNN (16, value)
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#define cpu_to_be32(value) __cpu_to_beNN (32, value)
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#define cpu_to_be64(value) __cpu_to_beNN (64, value)
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#define le16_to_cpu(value) __leNN_to_cpu (16, value)
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#define le32_to_cpu(value) __leNN_to_cpu (32, value)
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#define le64_to_cpu(value) __leNN_to_cpu (64, value)
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#define be16_to_cpu(value) __beNN_to_cpu (16, value)
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#define be32_to_cpu(value) __beNN_to_cpu (32, value)
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#define be64_to_cpu(value) __beNN_to_cpu (64, value)
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#define cpu_to_le16s(ptr) __cpu_to_leNNs (16, ptr)
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#define cpu_to_le32s(ptr) __cpu_to_leNNs (32, ptr)
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#define cpu_to_le64s(ptr) __cpu_to_leNNs (64, ptr)
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#define cpu_to_be16s(ptr) __cpu_to_beNNs (16, ptr)
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#define cpu_to_be32s(ptr) __cpu_to_beNNs (32, ptr)
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#define cpu_to_be64s(ptr) __cpu_to_beNNs (64, ptr)
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#define le16_to_cpus(ptr) __leNN_to_cpus (16, ptr)
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#define le32_to_cpus(ptr) __leNN_to_cpus (32, ptr)
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#define le64_to_cpus(ptr) __leNN_to_cpus (64, ptr)
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#define be16_to_cpus(ptr) __beNN_to_cpus (16, ptr)
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#define be32_to_cpus(ptr) __beNN_to_cpus (32, ptr)
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#define be64_to_cpus(ptr) __beNN_to_cpus (64, ptr)
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#define htonll(value) cpu_to_be64 (value)
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#define ntohll(value) be64_to_cpu (value)
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#define htonl(value) cpu_to_be32 (value)
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#define ntohl(value) be32_to_cpu (value)
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#define htons(value) cpu_to_be16 (value)
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#define ntohs(value) be16_to_cpu (value)
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#endif /* _BITS_BYTESWAP_H */
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