4 #include "qemu/bswap.h"
7 typedef __int128_t Int128
;
9 static inline Int128
int128_make64(uint64_t a
)
14 static inline Int128
int128_makes64(int64_t a
)
19 static inline Int128
int128_make128(uint64_t lo
, uint64_t hi
)
21 return (__uint128_t
)hi
<< 64 | lo
;
24 static inline uint64_t int128_get64(Int128 a
)
31 static inline uint64_t int128_getlo(Int128 a
)
36 static inline int64_t int128_gethi(Int128 a
)
41 static inline Int128
int128_zero(void)
46 static inline Int128
int128_one(void)
51 static inline Int128
int128_2_64(void)
53 return (Int128
)1 << 64;
56 static inline Int128
int128_exts64(int64_t a
)
61 static inline Int128
int128_not(Int128 a
)
66 static inline Int128
int128_and(Int128 a
, Int128 b
)
71 static inline Int128
int128_or(Int128 a
, Int128 b
)
76 static inline Int128
int128_xor(Int128 a
, Int128 b
)
81 static inline Int128
int128_rshift(Int128 a
, int n
)
86 static inline Int128
int128_urshift(Int128 a
, int n
)
88 return (__uint128_t
)a
>> n
;
91 static inline Int128
int128_lshift(Int128 a
, int n
)
96 static inline Int128
int128_add(Int128 a
, Int128 b
)
101 static inline Int128
int128_neg(Int128 a
)
106 static inline Int128
int128_sub(Int128 a
, Int128 b
)
111 static inline bool int128_nonneg(Int128 a
)
116 static inline bool int128_eq(Int128 a
, Int128 b
)
121 static inline bool int128_ne(Int128 a
, Int128 b
)
126 static inline bool int128_ge(Int128 a
, Int128 b
)
131 static inline bool int128_uge(Int128 a
, Int128 b
)
133 return ((__uint128_t
)a
) >= ((__uint128_t
)b
);
136 static inline bool int128_lt(Int128 a
, Int128 b
)
141 static inline bool int128_ult(Int128 a
, Int128 b
)
143 return (__uint128_t
)a
< (__uint128_t
)b
;
146 static inline bool int128_le(Int128 a
, Int128 b
)
151 static inline bool int128_gt(Int128 a
, Int128 b
)
156 static inline bool int128_nz(Int128 a
)
161 static inline Int128
int128_min(Int128 a
, Int128 b
)
163 return a
< b
? a
: b
;
166 static inline Int128
int128_max(Int128 a
, Int128 b
)
168 return a
> b
? a
: b
;
171 static inline void int128_addto(Int128
*a
, Int128 b
)
176 static inline void int128_subfrom(Int128
*a
, Int128 b
)
181 static inline Int128
bswap128(Int128 a
)
183 #if __has_builtin(__builtin_bswap128)
184 return __builtin_bswap128(a
);
186 return int128_make128(bswap64(int128_gethi(a
)), bswap64(int128_getlo(a
)));
190 static inline int clz128(Int128 a
)
193 return __builtin_clzll(a
>> 64);
195 return (a
) ? __builtin_clzll((uint64_t)a
) + 64 : 128;
199 static inline Int128
int128_divu(Int128 a
, Int128 b
)
201 return (__uint128_t
)a
/ (__uint128_t
)b
;
204 static inline Int128
int128_remu(Int128 a
, Int128 b
)
206 return (__uint128_t
)a
% (__uint128_t
)b
;
209 static inline Int128
int128_divs(Int128 a
, Int128 b
)
214 static inline Int128
int128_rems(Int128 a
, Int128 b
)
219 #else /* !CONFIG_INT128 */
221 typedef struct Int128 Int128
;
224 * We guarantee that the in-memory byte representation of an
225 * Int128 is that of a host-endian-order 128-bit integer
226 * (whether using this struct or the __int128_t version of the type).
227 * Some code using this type relies on this (eg when copying it into
228 * guest memory or a gdb protocol buffer, or by using Int128 in
229 * a union with other integer types).
241 static inline Int128
int128_make64(uint64_t a
)
243 return (Int128
) { .lo
= a
, .hi
= 0 };
246 static inline Int128
int128_makes64(int64_t a
)
248 return (Int128
) { .lo
= a
, .hi
= a
>> 63 };
251 static inline Int128
int128_make128(uint64_t lo
, uint64_t hi
)
253 return (Int128
) { .lo
= lo
, .hi
= hi
};
256 static inline uint64_t int128_get64(Int128 a
)
262 static inline uint64_t int128_getlo(Int128 a
)
267 static inline int64_t int128_gethi(Int128 a
)
272 static inline Int128
int128_zero(void)
274 return int128_make64(0);
277 static inline Int128
int128_one(void)
279 return int128_make64(1);
282 static inline Int128
int128_2_64(void)
284 return int128_make128(0, 1);
287 static inline Int128
int128_exts64(int64_t a
)
289 return int128_make128(a
, (a
< 0) ? -1 : 0);
292 static inline Int128
int128_not(Int128 a
)
294 return int128_make128(~a
.lo
, ~a
.hi
);
297 static inline Int128
int128_and(Int128 a
, Int128 b
)
299 return int128_make128(a
.lo
& b
.lo
, a
.hi
& b
.hi
);
302 static inline Int128
int128_or(Int128 a
, Int128 b
)
304 return int128_make128(a
.lo
| b
.lo
, a
.hi
| b
.hi
);
307 static inline Int128
int128_xor(Int128 a
, Int128 b
)
309 return int128_make128(a
.lo
^ b
.lo
, a
.hi
^ b
.hi
);
312 static inline Int128
int128_rshift(Int128 a
, int n
)
318 h
= a
.hi
>> (n
& 63);
320 return int128_make128(h
, h
>> 63);
322 return int128_make128((a
.lo
>> n
) | ((uint64_t)a
.hi
<< (64 - n
)), h
);
326 static inline Int128
int128_urshift(Int128 a
, int n
)
334 return int128_make64(h
);
336 return int128_make128((a
.lo
>> n
) | ((uint64_t)a
.hi
<< (64 - n
)), h
);
340 static inline Int128
int128_lshift(Int128 a
, int n
)
342 uint64_t l
= a
.lo
<< (n
& 63);
344 return int128_make128(0, l
);
346 return int128_make128(l
, (a
.hi
<< n
) | (a
.lo
>> (64 - n
)));
351 static inline Int128
int128_add(Int128 a
, Int128 b
)
353 uint64_t lo
= a
.lo
+ b
.lo
;
355 /* a.lo <= a.lo + b.lo < a.lo + k (k is the base, 2^64). Hence,
356 * a.lo + b.lo >= k implies 0 <= lo = a.lo + b.lo - k < a.lo.
357 * Similarly, a.lo + b.lo < k implies a.lo <= lo = a.lo + b.lo < k.
359 * So the carry is lo < a.lo.
361 return int128_make128(lo
, (uint64_t)a
.hi
+ b
.hi
+ (lo
< a
.lo
));
364 static inline Int128
int128_neg(Int128 a
)
367 return int128_make128(lo
, ~(uint64_t)a
.hi
+ !lo
);
370 static inline Int128
int128_sub(Int128 a
, Int128 b
)
372 return int128_make128(a
.lo
- b
.lo
, (uint64_t)a
.hi
- b
.hi
- (a
.lo
< b
.lo
));
375 static inline bool int128_nonneg(Int128 a
)
380 static inline bool int128_eq(Int128 a
, Int128 b
)
382 return a
.lo
== b
.lo
&& a
.hi
== b
.hi
;
385 static inline bool int128_ne(Int128 a
, Int128 b
)
387 return !int128_eq(a
, b
);
390 static inline bool int128_ge(Int128 a
, Int128 b
)
392 return a
.hi
> b
.hi
|| (a
.hi
== b
.hi
&& a
.lo
>= b
.lo
);
395 static inline bool int128_uge(Int128 a
, Int128 b
)
397 return (uint64_t)a
.hi
> (uint64_t)b
.hi
|| (a
.hi
== b
.hi
&& a
.lo
>= b
.lo
);
400 static inline bool int128_lt(Int128 a
, Int128 b
)
402 return !int128_ge(a
, b
);
405 static inline bool int128_ult(Int128 a
, Int128 b
)
407 return !int128_uge(a
, b
);
410 static inline bool int128_le(Int128 a
, Int128 b
)
412 return int128_ge(b
, a
);
415 static inline bool int128_gt(Int128 a
, Int128 b
)
417 return !int128_le(a
, b
);
420 static inline bool int128_nz(Int128 a
)
425 static inline Int128
int128_min(Int128 a
, Int128 b
)
427 return int128_le(a
, b
) ? a
: b
;
430 static inline Int128
int128_max(Int128 a
, Int128 b
)
432 return int128_ge(a
, b
) ? a
: b
;
435 static inline void int128_addto(Int128
*a
, Int128 b
)
437 *a
= int128_add(*a
, b
);
440 static inline void int128_subfrom(Int128
*a
, Int128 b
)
442 *a
= int128_sub(*a
, b
);
445 static inline Int128
bswap128(Int128 a
)
447 return int128_make128(bswap64(a
.hi
), bswap64(a
.lo
));
450 static inline int clz128(Int128 a
)
453 return __builtin_clzll(a
.hi
);
455 return (a
.lo
) ? __builtin_clzll(a
.lo
) + 64 : 128;
459 Int128
int128_divu(Int128
, Int128
);
460 Int128
int128_remu(Int128
, Int128
);
461 Int128
int128_divs(Int128
, Int128
);
462 Int128
int128_rems(Int128
, Int128
);
464 #endif /* CONFIG_INT128 */
466 static inline void bswap128s(Int128
*s
)
471 #define UINT128_MAX int128_make128(~0LL, ~0LL)
472 #define INT128_MAX int128_make128(UINT64_MAX, INT64_MAX)
473 #define INT128_MIN int128_make128(0, INT64_MIN)
475 #endif /* INT128_H */