564 lines
14 KiB
C
564 lines
14 KiB
C
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#ifndef BSWAP_H
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#define BSWAP_H
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#include "fpu/softfloat-types.h"
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#ifdef CONFIG_MACHINE_BSWAP_H
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# include <sys/endian.h>
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# include <machine/bswap.h>
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#elif defined(__FreeBSD__)
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# include <sys/endian.h>
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#elif defined(__HAIKU__)
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# include <endian.h>
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#elif defined(CONFIG_BYTESWAP_H)
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# include <byteswap.h>
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static inline uint16_t bswap16(uint16_t x)
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{
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return bswap_16(x);
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}
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static inline uint32_t bswap32(uint32_t x)
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{
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return bswap_32(x);
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}
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static inline uint64_t bswap64(uint64_t x)
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{
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return bswap_64(x);
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}
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# else
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static inline uint16_t bswap16(uint16_t x)
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{
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return (((x & 0x00ff) << 8) |
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((x & 0xff00) >> 8));
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}
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static inline uint32_t bswap32(uint32_t x)
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{
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return (((x & 0x000000ffU) << 24) |
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((x & 0x0000ff00U) << 8) |
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((x & 0x00ff0000U) >> 8) |
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((x & 0xff000000U) >> 24));
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}
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static inline uint64_t bswap64(uint64_t x)
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{
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return (((x & 0x00000000000000ffULL) << 56) |
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((x & 0x000000000000ff00ULL) << 40) |
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((x & 0x0000000000ff0000ULL) << 24) |
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((x & 0x00000000ff000000ULL) << 8) |
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((x & 0x000000ff00000000ULL) >> 8) |
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((x & 0x0000ff0000000000ULL) >> 24) |
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((x & 0x00ff000000000000ULL) >> 40) |
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((x & 0xff00000000000000ULL) >> 56));
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}
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#endif /* ! CONFIG_MACHINE_BSWAP_H */
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static inline void bswap16s(uint16_t *s)
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{
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*s = bswap16(*s);
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}
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static inline void bswap32s(uint32_t *s)
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{
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*s = bswap32(*s);
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}
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static inline void bswap64s(uint64_t *s)
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{
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*s = bswap64(*s);
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}
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#if defined(HOST_WORDS_BIGENDIAN)
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#define be_bswap(v, size) (v)
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#define le_bswap(v, size) glue(bswap, size)(v)
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#define be_bswaps(v, size)
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#define le_bswaps(p, size) do { *p = glue(bswap, size)(*p); } while(0)
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#else
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#define le_bswap(v, size) (v)
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#define be_bswap(v, size) glue(bswap, size)(v)
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#define le_bswaps(v, size)
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#define be_bswaps(p, size) do { *p = glue(bswap, size)(*p); } while(0)
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#endif
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/**
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* Endianness conversion functions between host cpu and specified endianness.
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* (We list the complete set of prototypes produced by the macros below
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* to assist people who search the headers to find their definitions.)
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*
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* uint16_t le16_to_cpu(uint16_t v);
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* uint32_t le32_to_cpu(uint32_t v);
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* uint64_t le64_to_cpu(uint64_t v);
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* uint16_t be16_to_cpu(uint16_t v);
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* uint32_t be32_to_cpu(uint32_t v);
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* uint64_t be64_to_cpu(uint64_t v);
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*
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* Convert the value @v from the specified format to the native
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* endianness of the host CPU by byteswapping if necessary, and
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* return the converted value.
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*
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* uint16_t cpu_to_le16(uint16_t v);
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* uint32_t cpu_to_le32(uint32_t v);
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* uint64_t cpu_to_le64(uint64_t v);
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* uint16_t cpu_to_be16(uint16_t v);
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* uint32_t cpu_to_be32(uint32_t v);
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* uint64_t cpu_to_be64(uint64_t v);
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*
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* Convert the value @v from the native endianness of the host CPU to
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* the specified format by byteswapping if necessary, and return
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* the converted value.
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*
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* void le16_to_cpus(uint16_t *v);
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* void le32_to_cpus(uint32_t *v);
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* void le64_to_cpus(uint64_t *v);
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* void be16_to_cpus(uint16_t *v);
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* void be32_to_cpus(uint32_t *v);
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* void be64_to_cpus(uint64_t *v);
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*
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* Do an in-place conversion of the value pointed to by @v from the
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* specified format to the native endianness of the host CPU.
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*
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* void cpu_to_le16s(uint16_t *v);
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* void cpu_to_le32s(uint32_t *v);
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* void cpu_to_le64s(uint64_t *v);
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* void cpu_to_be16s(uint16_t *v);
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* void cpu_to_be32s(uint32_t *v);
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* void cpu_to_be64s(uint64_t *v);
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*
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* Do an in-place conversion of the value pointed to by @v from the
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* native endianness of the host CPU to the specified format.
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*
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* Both X_to_cpu() and cpu_to_X() perform the same operation; you
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* should use whichever one is better documenting of the function your
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* code is performing.
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*
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* Do not use these functions for conversion of values which are in guest
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* memory, since the data may not be sufficiently aligned for the host CPU's
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* load and store instructions. Instead you should use the ld*_p() and
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* st*_p() functions, which perform loads and stores of data of any
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* required size and endianness and handle possible misalignment.
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*/
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#define CPU_CONVERT(endian, size, type)\
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static inline type endian ## size ## _to_cpu(type v)\
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{\
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return glue(endian, _bswap)(v, size);\
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}\
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\
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static inline type cpu_to_ ## endian ## size(type v)\
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{\
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return glue(endian, _bswap)(v, size);\
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}\
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\
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static inline void endian ## size ## _to_cpus(type *p)\
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{\
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glue(endian, _bswaps)(p, size);\
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}\
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\
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static inline void cpu_to_ ## endian ## size ## s(type *p)\
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{\
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glue(endian, _bswaps)(p, size);\
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}
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CPU_CONVERT(be, 16, uint16_t)
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CPU_CONVERT(be, 32, uint32_t)
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CPU_CONVERT(be, 64, uint64_t)
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CPU_CONVERT(le, 16, uint16_t)
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CPU_CONVERT(le, 32, uint32_t)
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CPU_CONVERT(le, 64, uint64_t)
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/* len must be one of 1, 2, 4 */
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static inline uint32_t qemu_bswap_len(uint32_t value, int len)
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{
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return bswap32(value) >> (32 - 8 * len);
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}
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/*
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* Same as cpu_to_le{16,32}, except that gcc will figure the result is
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* a compile-time constant if you pass in a constant. So this can be
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* used to initialize static variables.
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*/
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#if defined(HOST_WORDS_BIGENDIAN)
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# define const_le32(_x) \
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((((_x) & 0x000000ffU) << 24) | \
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(((_x) & 0x0000ff00U) << 8) | \
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(((_x) & 0x00ff0000U) >> 8) | \
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(((_x) & 0xff000000U) >> 24))
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# define const_le16(_x) \
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((((_x) & 0x00ff) << 8) | \
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(((_x) & 0xff00) >> 8))
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#else
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# define const_le32(_x) (_x)
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# define const_le16(_x) (_x)
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#endif
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/* Unions for reinterpreting between floats and integers. */
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typedef union {
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float32 f;
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uint32_t l;
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} CPU_FloatU;
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typedef union {
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float64 d;
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#if defined(HOST_WORDS_BIGENDIAN)
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struct {
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uint32_t upper;
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uint32_t lower;
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} l;
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#else
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struct {
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uint32_t lower;
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uint32_t upper;
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} l;
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#endif
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uint64_t ll;
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} CPU_DoubleU;
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typedef union {
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floatx80 d;
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struct {
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uint64_t lower;
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uint16_t upper;
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} l;
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} CPU_LDoubleU;
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typedef union {
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float128 q;
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#if defined(HOST_WORDS_BIGENDIAN)
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struct {
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uint32_t upmost;
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uint32_t upper;
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uint32_t lower;
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uint32_t lowest;
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} l;
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struct {
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uint64_t upper;
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uint64_t lower;
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} ll;
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#else
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struct {
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uint32_t lowest;
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uint32_t lower;
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uint32_t upper;
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uint32_t upmost;
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} l;
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struct {
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uint64_t lower;
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uint64_t upper;
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} ll;
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#endif
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} CPU_QuadU;
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/* unaligned/endian-independent pointer access */
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/*
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* the generic syntax is:
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*
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* load: ld{type}{sign}{size}_{endian}_p(ptr)
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*
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* store: st{type}{size}_{endian}_p(ptr, val)
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*
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* Note there are small differences with the softmmu access API!
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*
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* type is:
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* (empty): integer access
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* f : float access
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*
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* sign is:
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* (empty): for 32 or 64 bit sizes (including floats and doubles)
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* u : unsigned
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* s : signed
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*
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* size is:
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* b: 8 bits
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* w: 16 bits
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* l: 32 bits
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* q: 64 bits
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*
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* endian is:
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* he : host endian
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* be : big endian
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* le : little endian
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* te : target endian
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* (except for byte accesses, which have no endian infix).
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*
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* The target endian accessors are obviously only available to source
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* files which are built per-target; they are defined in cpu-all.h.
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*
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* In all cases these functions take a host pointer.
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* For accessors that take a guest address rather than a
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* host address, see the cpu_{ld,st}_* accessors defined in
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* cpu_ldst.h.
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*
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* For cases where the size to be used is not fixed at compile time,
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* there are
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* stn_{endian}_p(ptr, sz, val)
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* which stores @val to @ptr as an @endian-order number @sz bytes in size
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* and
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* ldn_{endian}_p(ptr, sz)
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* which loads @sz bytes from @ptr as an unsigned @endian-order number
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* and returns it in a uint64_t.
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*/
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static inline int ldub_p(const void *ptr)
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{
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return *(uint8_t *)ptr;
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}
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static inline int ldsb_p(const void *ptr)
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{
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return *(int8_t *)ptr;
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}
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static inline void stb_p(void *ptr, uint8_t v)
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{
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*(uint8_t *)ptr = v;
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}
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/*
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* Any compiler worth its salt will turn these memcpy into native unaligned
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* operations. Thus we don't need to play games with packed attributes, or
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* inline byte-by-byte stores.
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* Some compilation environments (eg some fortify-source implementations)
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* may intercept memcpy() in a way that defeats the compiler optimization,
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* though, so we use __builtin_memcpy() to give ourselves the best chance
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* of good performance.
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*/
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static inline int lduw_he_p(const void *ptr)
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{
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uint16_t r;
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__builtin_memcpy(&r, ptr, sizeof(r));
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return r;
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}
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static inline int ldsw_he_p(const void *ptr)
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{
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int16_t r;
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__builtin_memcpy(&r, ptr, sizeof(r));
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return r;
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}
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static inline void stw_he_p(void *ptr, uint16_t v)
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{
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__builtin_memcpy(ptr, &v, sizeof(v));
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}
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static inline int ldl_he_p(const void *ptr)
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{
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int32_t r;
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__builtin_memcpy(&r, ptr, sizeof(r));
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return r;
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}
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static inline void stl_he_p(void *ptr, uint32_t v)
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{
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__builtin_memcpy(ptr, &v, sizeof(v));
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}
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static inline uint64_t ldq_he_p(const void *ptr)
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{
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uint64_t r;
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__builtin_memcpy(&r, ptr, sizeof(r));
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return r;
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}
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static inline void stq_he_p(void *ptr, uint64_t v)
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{
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__builtin_memcpy(ptr, &v, sizeof(v));
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}
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static inline int lduw_le_p(const void *ptr)
|
||
|
|
{
|
||
|
|
return (uint16_t)le_bswap(lduw_he_p(ptr), 16);
|
||
|
|
}
|
||
|
|
|
||
|
|
static inline int ldsw_le_p(const void *ptr)
|
||
|
|
{
|
||
|
|
return (int16_t)le_bswap(lduw_he_p(ptr), 16);
|
||
|
|
}
|
||
|
|
|
||
|
|
static inline int ldl_le_p(const void *ptr)
|
||
|
|
{
|
||
|
|
return le_bswap(ldl_he_p(ptr), 32);
|
||
|
|
}
|
||
|
|
|
||
|
|
static inline uint64_t ldq_le_p(const void *ptr)
|
||
|
|
{
|
||
|
|
return le_bswap(ldq_he_p(ptr), 64);
|
||
|
|
}
|
||
|
|
|
||
|
|
static inline void stw_le_p(void *ptr, uint16_t v)
|
||
|
|
{
|
||
|
|
stw_he_p(ptr, le_bswap(v, 16));
|
||
|
|
}
|
||
|
|
|
||
|
|
static inline void stl_le_p(void *ptr, uint32_t v)
|
||
|
|
{
|
||
|
|
stl_he_p(ptr, le_bswap(v, 32));
|
||
|
|
}
|
||
|
|
|
||
|
|
static inline void stq_le_p(void *ptr, uint64_t v)
|
||
|
|
{
|
||
|
|
stq_he_p(ptr, le_bswap(v, 64));
|
||
|
|
}
|
||
|
|
|
||
|
|
/* float access */
|
||
|
|
|
||
|
|
static inline float32 ldfl_le_p(const void *ptr)
|
||
|
|
{
|
||
|
|
CPU_FloatU u;
|
||
|
|
u.l = ldl_le_p(ptr);
|
||
|
|
return u.f;
|
||
|
|
}
|
||
|
|
|
||
|
|
static inline void stfl_le_p(void *ptr, float32 v)
|
||
|
|
{
|
||
|
|
CPU_FloatU u;
|
||
|
|
u.f = v;
|
||
|
|
stl_le_p(ptr, u.l);
|
||
|
|
}
|
||
|
|
|
||
|
|
static inline float64 ldfq_le_p(const void *ptr)
|
||
|
|
{
|
||
|
|
CPU_DoubleU u;
|
||
|
|
u.ll = ldq_le_p(ptr);
|
||
|
|
return u.d;
|
||
|
|
}
|
||
|
|
|
||
|
|
static inline void stfq_le_p(void *ptr, float64 v)
|
||
|
|
{
|
||
|
|
CPU_DoubleU u;
|
||
|
|
u.d = v;
|
||
|
|
stq_le_p(ptr, u.ll);
|
||
|
|
}
|
||
|
|
|
||
|
|
static inline int lduw_be_p(const void *ptr)
|
||
|
|
{
|
||
|
|
return (uint16_t)be_bswap(lduw_he_p(ptr), 16);
|
||
|
|
}
|
||
|
|
|
||
|
|
static inline int ldsw_be_p(const void *ptr)
|
||
|
|
{
|
||
|
|
return (int16_t)be_bswap(lduw_he_p(ptr), 16);
|
||
|
|
}
|
||
|
|
|
||
|
|
static inline int ldl_be_p(const void *ptr)
|
||
|
|
{
|
||
|
|
return be_bswap(ldl_he_p(ptr), 32);
|
||
|
|
}
|
||
|
|
|
||
|
|
static inline uint64_t ldq_be_p(const void *ptr)
|
||
|
|
{
|
||
|
|
return be_bswap(ldq_he_p(ptr), 64);
|
||
|
|
}
|
||
|
|
|
||
|
|
static inline void stw_be_p(void *ptr, uint16_t v)
|
||
|
|
{
|
||
|
|
stw_he_p(ptr, be_bswap(v, 16));
|
||
|
|
}
|
||
|
|
|
||
|
|
static inline void stl_be_p(void *ptr, uint32_t v)
|
||
|
|
{
|
||
|
|
stl_he_p(ptr, be_bswap(v, 32));
|
||
|
|
}
|
||
|
|
|
||
|
|
static inline void stq_be_p(void *ptr, uint64_t v)
|
||
|
|
{
|
||
|
|
stq_he_p(ptr, be_bswap(v, 64));
|
||
|
|
}
|
||
|
|
|
||
|
|
/* float access */
|
||
|
|
|
||
|
|
static inline float32 ldfl_be_p(const void *ptr)
|
||
|
|
{
|
||
|
|
CPU_FloatU u;
|
||
|
|
u.l = ldl_be_p(ptr);
|
||
|
|
return u.f;
|
||
|
|
}
|
||
|
|
|
||
|
|
static inline void stfl_be_p(void *ptr, float32 v)
|
||
|
|
{
|
||
|
|
CPU_FloatU u;
|
||
|
|
u.f = v;
|
||
|
|
stl_be_p(ptr, u.l);
|
||
|
|
}
|
||
|
|
|
||
|
|
static inline float64 ldfq_be_p(const void *ptr)
|
||
|
|
{
|
||
|
|
CPU_DoubleU u;
|
||
|
|
u.ll = ldq_be_p(ptr);
|
||
|
|
return u.d;
|
||
|
|
}
|
||
|
|
|
||
|
|
static inline void stfq_be_p(void *ptr, float64 v)
|
||
|
|
{
|
||
|
|
CPU_DoubleU u;
|
||
|
|
u.d = v;
|
||
|
|
stq_be_p(ptr, u.ll);
|
||
|
|
}
|
||
|
|
|
||
|
|
static inline unsigned long leul_to_cpu(unsigned long v)
|
||
|
|
{
|
||
|
|
#if HOST_LONG_BITS == 32
|
||
|
|
return le_bswap(v, 32);
|
||
|
|
#elif HOST_LONG_BITS == 64
|
||
|
|
return le_bswap(v, 64);
|
||
|
|
#else
|
||
|
|
# error Unknown sizeof long
|
||
|
|
#endif
|
||
|
|
}
|
||
|
|
|
||
|
|
/* Store v to p as a sz byte value in host order */
|
||
|
|
#define DO_STN_LDN_P(END) \
|
||
|
|
static inline void stn_## END ## _p(void *ptr, int sz, uint64_t v) \
|
||
|
|
{ \
|
||
|
|
switch (sz) { \
|
||
|
|
case 1: \
|
||
|
|
stb_p(ptr, v); \
|
||
|
|
break; \
|
||
|
|
case 2: \
|
||
|
|
stw_ ## END ## _p(ptr, v); \
|
||
|
|
break; \
|
||
|
|
case 4: \
|
||
|
|
stl_ ## END ## _p(ptr, v); \
|
||
|
|
break; \
|
||
|
|
case 8: \
|
||
|
|
stq_ ## END ## _p(ptr, v); \
|
||
|
|
break; \
|
||
|
|
default: \
|
||
|
|
g_assert_not_reached(); \
|
||
|
|
} \
|
||
|
|
} \
|
||
|
|
static inline uint64_t ldn_## END ## _p(const void *ptr, int sz) \
|
||
|
|
{ \
|
||
|
|
switch (sz) { \
|
||
|
|
case 1: \
|
||
|
|
return ldub_p(ptr); \
|
||
|
|
case 2: \
|
||
|
|
return lduw_ ## END ## _p(ptr); \
|
||
|
|
case 4: \
|
||
|
|
return (uint32_t)ldl_ ## END ## _p(ptr); \
|
||
|
|
case 8: \
|
||
|
|
return ldq_ ## END ## _p(ptr); \
|
||
|
|
default: \
|
||
|
|
g_assert_not_reached(); \
|
||
|
|
} \
|
||
|
|
}
|
||
|
|
|
||
|
|
DO_STN_LDN_P(he)
|
||
|
|
DO_STN_LDN_P(le)
|
||
|
|
DO_STN_LDN_P(be)
|
||
|
|
|
||
|
|
#undef DO_STN_LDN_P
|
||
|
|
|
||
|
|
#undef le_bswap
|
||
|
|
#undef be_bswap
|
||
|
|
#undef le_bswaps
|
||
|
|
#undef be_bswaps
|
||
|
|
|
||
|
|
#endif /* BSWAP_H */
|