4 #include "fpu/softfloat-types.h"
6 #ifdef CONFIG_MACHINE_BSWAP_H
7 # include <sys/endian.h>
8 # include <machine/bswap.h>
9 #elif defined(__FreeBSD__)
10 # include <sys/endian.h>
11 #elif defined(CONFIG_BYTESWAP_H)
12 # include <byteswap.h>
14 static inline uint16_t bswap16(uint16_t x)
19 static inline uint32_t bswap32(uint32_t x)
24 static inline uint64_t bswap64(uint64_t x)
29 static inline uint16_t bswap16(uint16_t x)
31 return (((x & 0x00ff) << 8) |
35 static inline uint32_t bswap32(uint32_t x)
37 return (((x & 0x000000ffU) << 24) |
38 ((x & 0x0000ff00U) << 8) |
39 ((x & 0x00ff0000U) >> 8) |
40 ((x & 0xff000000U) >> 24));
43 static inline uint64_t bswap64(uint64_t x)
45 return (((x & 0x00000000000000ffULL) << 56) |
46 ((x & 0x000000000000ff00ULL) << 40) |
47 ((x & 0x0000000000ff0000ULL) << 24) |
48 ((x & 0x00000000ff000000ULL) << 8) |
49 ((x & 0x000000ff00000000ULL) >> 8) |
50 ((x & 0x0000ff0000000000ULL) >> 24) |
51 ((x & 0x00ff000000000000ULL) >> 40) |
52 ((x & 0xff00000000000000ULL) >> 56));
54 #endif /* ! CONFIG_MACHINE_BSWAP_H */
56 static inline void bswap16s(uint16_t *s)
61 static inline void bswap32s(uint32_t *s)
66 static inline void bswap64s(uint64_t *s)
71 #if defined(HOST_WORDS_BIGENDIAN)
72 #define be_bswap(v, size) (v)
73 #define le_bswap(v, size) glue(bswap, size)(v)
74 #define be_bswaps(v, size)
75 #define le_bswaps(p, size) do { *p = glue(bswap, size)(*p); } while(0)
77 #define le_bswap(v, size) (v)
78 #define be_bswap(v, size) glue(bswap, size)(v)
79 #define le_bswaps(v, size)
80 #define be_bswaps(p, size) do { *p = glue(bswap, size)(*p); } while(0)
84 * Endianness conversion functions between host cpu and specified endianness.
85 * (We list the complete set of prototypes produced by the macros below
86 * to assist people who search the headers to find their definitions.)
88 * uint16_t le16_to_cpu(uint16_t v);
89 * uint32_t le32_to_cpu(uint32_t v);
90 * uint64_t le64_to_cpu(uint64_t v);
91 * uint16_t be16_to_cpu(uint16_t v);
92 * uint32_t be32_to_cpu(uint32_t v);
93 * uint64_t be64_to_cpu(uint64_t v);
95 * Convert the value @v from the specified format to the native
96 * endianness of the host CPU by byteswapping if necessary, and
97 * return the converted value.
99 * uint16_t cpu_to_le16(uint16_t v);
100 * uint32_t cpu_to_le32(uint32_t v);
101 * uint64_t cpu_to_le64(uint64_t v);
102 * uint16_t cpu_to_be16(uint16_t v);
103 * uint32_t cpu_to_be32(uint32_t v);
104 * uint64_t cpu_to_be64(uint64_t v);
106 * Convert the value @v from the native endianness of the host CPU to
107 * the specified format by byteswapping if necessary, and return
108 * the converted value.
110 * void le16_to_cpus(uint16_t *v);
111 * void le32_to_cpus(uint32_t *v);
112 * void le64_to_cpus(uint64_t *v);
113 * void be16_to_cpus(uint16_t *v);
114 * void be32_to_cpus(uint32_t *v);
115 * void be64_to_cpus(uint64_t *v);
117 * Do an in-place conversion of the value pointed to by @v from the
118 * specified format to the native endianness of the host CPU.
120 * void cpu_to_le16s(uint16_t *v);
121 * void cpu_to_le32s(uint32_t *v);
122 * void cpu_to_le64s(uint64_t *v);
123 * void cpu_to_be16s(uint16_t *v);
124 * void cpu_to_be32s(uint32_t *v);
125 * void cpu_to_be64s(uint64_t *v);
127 * Do an in-place conversion of the value pointed to by @v from the
128 * native endianness of the host CPU to the specified format.
130 * Both X_to_cpu() and cpu_to_X() perform the same operation; you
131 * should use whichever one is better documenting of the function your
132 * code is performing.
134 * Do not use these functions for conversion of values which are in guest
135 * memory, since the data may not be sufficiently aligned for the host CPU's
136 * load and store instructions. Instead you should use the ld*_p() and
137 * st*_p() functions, which perform loads and stores of data of any
138 * required size and endianness and handle possible misalignment.
141 #define CPU_CONVERT(endian, size, type)\
142 static inline type endian ## size ## _to_cpu(type v)\
144 return glue(endian, _bswap)(v, size);\
147 static inline type cpu_to_ ## endian ## size(type v)\
149 return glue(endian, _bswap)(v, size);\
152 static inline void endian ## size ## _to_cpus(type *p)\
154 glue(endian, _bswaps)(p, size);\
157 static inline void cpu_to_ ## endian ## size ## s(type *p)\
159 glue(endian, _bswaps)(p, size);\
162 CPU_CONVERT(be, 16, uint16_t)
163 CPU_CONVERT(be, 32, uint32_t)
164 CPU_CONVERT(be, 64, uint64_t)
166 CPU_CONVERT(le, 16, uint16_t)
167 CPU_CONVERT(le, 32, uint32_t)
168 CPU_CONVERT(le, 64, uint64_t)
170 /* len must be one of 1, 2, 4 */
171 static inline uint32_t qemu_bswap_len(uint32_t value, int len)
173 return bswap32(value) >> (32 - 8 * len);
177 * Same as cpu_to_le{16,32}, except that gcc will figure the result is
178 * a compile-time constant if you pass in a constant. So this can be
179 * used to initialize static variables.
181 #if defined(HOST_WORDS_BIGENDIAN)
182 # define const_le32(_x) \
183 ((((_x) & 0x000000ffU) << 24) | \
184 (((_x) & 0x0000ff00U) << 8) | \
185 (((_x) & 0x00ff0000U) >> 8) | \
186 (((_x) & 0xff000000U) >> 24))
187 # define const_le16(_x) \
188 ((((_x) & 0x00ff) << 8) | \
189 (((_x) & 0xff00) >> 8))
191 # define const_le32(_x) (_x)
192 # define const_le16(_x) (_x)
195 /* Unions for reinterpreting between floats and integers. */
204 #if defined(HOST_WORDS_BIGENDIAN)
228 #if defined(HOST_WORDS_BIGENDIAN)
253 /* unaligned/endian-independent pointer access */
256 * the generic syntax is:
258 * load: ld{type}{sign}{size}_{endian}_p(ptr)
260 * store: st{type}{size}_{endian}_p(ptr, val)
262 * Note there are small differences with the softmmu access API!
265 * (empty): integer access
269 * (empty): for 32 or 64 bit sizes (including floats and doubles)
284 * (except for byte accesses, which have no endian infix).
286 * The target endian accessors are obviously only available to source
287 * files which are built per-target; they are defined in cpu-all.h.
289 * In all cases these functions take a host pointer.
290 * For accessors that take a guest address rather than a
291 * host address, see the cpu_{ld,st}_* accessors defined in
294 * For cases where the size to be used is not fixed at compile time,
296 * stn_{endian}_p(ptr, sz, val)
297 * which stores @val to @ptr as an @endian-order number @sz bytes in size
299 * ldn_{endian}_p(ptr, sz)
300 * which loads @sz bytes from @ptr as an unsigned @endian-order number
301 * and returns it in a uint64_t.
304 static inline int ldub_p(const void *ptr)
306 return *(uint8_t *)ptr;
309 static inline int ldsb_p(const void *ptr)
311 return *(int8_t *)ptr;
314 static inline void stb_p(void *ptr, uint8_t v)
320 * Any compiler worth its salt will turn these memcpy into native unaligned
321 * operations. Thus we don't need to play games with packed attributes, or
322 * inline byte-by-byte stores.
323 * Some compilation environments (eg some fortify-source implementations)
324 * may intercept memcpy() in a way that defeats the compiler optimization,
325 * though, so we use __builtin_memcpy() to give ourselves the best chance
326 * of good performance.
329 static inline int lduw_he_p(const void *ptr)
332 __builtin_memcpy(&r, ptr, sizeof(r));
336 static inline int ldsw_he_p(const void *ptr)
339 __builtin_memcpy(&r, ptr, sizeof(r));
343 static inline void stw_he_p(void *ptr, uint16_t v)
345 __builtin_memcpy(ptr, &v, sizeof(v));
348 static inline int ldl_he_p(const void *ptr)
351 __builtin_memcpy(&r, ptr, sizeof(r));
355 static inline void stl_he_p(void *ptr, uint32_t v)
357 __builtin_memcpy(ptr, &v, sizeof(v));
360 static inline uint64_t ldq_he_p(const void *ptr)
363 __builtin_memcpy(&r, ptr, sizeof(r));
367 static inline void stq_he_p(void *ptr, uint64_t v)
369 __builtin_memcpy(ptr, &v, sizeof(v));
372 static inline int lduw_le_p(const void *ptr)
374 return (uint16_t)le_bswap(lduw_he_p(ptr), 16);
377 static inline int ldsw_le_p(const void *ptr)
379 return (int16_t)le_bswap(lduw_he_p(ptr), 16);
382 static inline int ldl_le_p(const void *ptr)
384 return le_bswap(ldl_he_p(ptr), 32);
387 static inline uint64_t ldq_le_p(const void *ptr)
389 return le_bswap(ldq_he_p(ptr), 64);
392 static inline void stw_le_p(void *ptr, uint16_t v)
394 stw_he_p(ptr, le_bswap(v, 16));
397 static inline void stl_le_p(void *ptr, uint32_t v)
399 stl_he_p(ptr, le_bswap(v, 32));
402 static inline void stq_le_p(void *ptr, uint64_t v)
404 stq_he_p(ptr, le_bswap(v, 64));
409 static inline float32 ldfl_le_p(const void *ptr)
416 static inline void stfl_le_p(void *ptr, float32 v)
423 static inline float64 ldfq_le_p(const void *ptr)
426 u.ll = ldq_le_p(ptr);
430 static inline void stfq_le_p(void *ptr, float64 v)
437 static inline int lduw_be_p(const void *ptr)
439 return (uint16_t)be_bswap(lduw_he_p(ptr), 16);
442 static inline int ldsw_be_p(const void *ptr)
444 return (int16_t)be_bswap(lduw_he_p(ptr), 16);
447 static inline int ldl_be_p(const void *ptr)
449 return be_bswap(ldl_he_p(ptr), 32);
452 static inline uint64_t ldq_be_p(const void *ptr)
454 return be_bswap(ldq_he_p(ptr), 64);
457 static inline void stw_be_p(void *ptr, uint16_t v)
459 stw_he_p(ptr, be_bswap(v, 16));
462 static inline void stl_be_p(void *ptr, uint32_t v)
464 stl_he_p(ptr, be_bswap(v, 32));
467 static inline void stq_be_p(void *ptr, uint64_t v)
469 stq_he_p(ptr, be_bswap(v, 64));
474 static inline float32 ldfl_be_p(const void *ptr)
481 static inline void stfl_be_p(void *ptr, float32 v)
488 static inline float64 ldfq_be_p(const void *ptr)
491 u.ll = ldq_be_p(ptr);
495 static inline void stfq_be_p(void *ptr, float64 v)
502 static inline unsigned long leul_to_cpu(unsigned long v)
504 #if HOST_LONG_BITS == 32
505 return le_bswap(v, 32);
506 #elif HOST_LONG_BITS == 64
507 return le_bswap(v, 64);
509 # error Unknown sizeof long
513 /* Store v to p as a sz byte value in host order */
514 #define DO_STN_LDN_P(END) \
515 static inline void stn_## END ## _p(void *ptr, int sz, uint64_t v) \
522 stw_ ## END ## _p(ptr, v); \
525 stl_ ## END ## _p(ptr, v); \
528 stq_ ## END ## _p(ptr, v); \
531 g_assert_not_reached(); \
534 static inline uint64_t ldn_## END ## _p(const void *ptr, int sz) \
538 return ldub_p(ptr); \
540 return lduw_ ## END ## _p(ptr); \
542 return (uint32_t)ldl_ ## END ## _p(ptr); \
544 return ldq_ ## END ## _p(ptr); \
546 g_assert_not_reached(); \