1 /* HOST_WIDE_INT definitions for the GNU compiler.
2 Copyright (C) 1998-2016 Free Software Foundation, Inc.
4 This file is part of GCC.
6 Provide definitions for macros which depend on HOST_BITS_PER_INT
7 and HOST_BITS_PER_LONG. */
12 /* This describes the machine the compiler is hosted on. */
13 #define HOST_BITS_PER_CHAR CHAR_BIT
14 #define HOST_BITS_PER_SHORT (CHAR_BIT * SIZEOF_SHORT)
15 #define HOST_BITS_PER_INT (CHAR_BIT * SIZEOF_INT)
16 #define HOST_BITS_PER_LONG (CHAR_BIT * SIZEOF_LONG)
18 /* The string that should be inserted into a printf style format to
19 indicate a "long" operand. */
20 #ifndef HOST_LONG_FORMAT
21 #define HOST_LONG_FORMAT "l"
24 /* The string that should be inserted into a printf style format to
25 indicate a "long long" operand. */
26 #ifndef HOST_LONG_LONG_FORMAT
27 #define HOST_LONG_LONG_FORMAT "ll"
30 /* If HAVE_LONG_LONG and SIZEOF_LONG_LONG aren't defined, but
31 GCC_VERSION >= 3000, assume this is the second or later stage of a
32 bootstrap, we do have long long, and it's 64 bits. (This is
33 required by C99; we do have some ports that violate that assumption
34 but they're all cross-compile-only.) Just in case, force a
35 constraint violation if that assumption is incorrect. */
36 #if !defined HAVE_LONG_LONG
37 # if GCC_VERSION >= 3000
38 # define HAVE_LONG_LONG 1
39 # define SIZEOF_LONG_LONG 8
40 extern char sizeof_long_long_must_be_8[sizeof (long long) == 8 ? 1 : -1];
45 # define HOST_BITS_PER_LONGLONG (CHAR_BIT * SIZEOF_LONG_LONG)
48 /* Set HOST_WIDE_INT, this should be always 64 bits.
49 The underlying type is matched to that of int64_t and assumed
50 to be either long or long long. */
52 #define HOST_BITS_PER_WIDE_INT 64
54 # define HOST_WIDE_INT long
55 # define HOST_WIDE_INT_C(X) X ## L
57 # if HOST_BITS_PER_LONGLONG == 64
58 # define HOST_WIDE_INT long long
59 # define HOST_WIDE_INT_C(X) X ## LL
61 #error "Unable to find a suitable type for HOST_WIDE_INT"
65 #define HOST_WIDE_INT_UC(X) HOST_WIDE_INT_C (X ## U)
66 #define HOST_WIDE_INT_1 HOST_WIDE_INT_C (1)
67 #define HOST_WIDE_INT_1U HOST_WIDE_INT_UC (1)
68 #define HOST_WIDE_INT_M1 HOST_WIDE_INT_C (-1)
69 #define HOST_WIDE_INT_M1U HOST_WIDE_INT_UC (-1)
71 /* This is a magic identifier which allows GCC to figure out the type
72 of HOST_WIDE_INT for %wd specifier checks. You must issue this
73 typedef before using the __asm_fprintf__ format attribute. */
74 typedef HOST_WIDE_INT __gcc_host_wide_int__;
76 /* Provide C99 <inttypes.h> style format definitions for 64bits. */
77 #ifndef HAVE_INTTYPES_H
79 # define GCC_PRI64 HOST_LONG_FORMAT
81 # define GCC_PRI64 HOST_LONG_LONG_FORMAT
84 #define PRId64 GCC_PRI64 "d"
86 #define PRIi64 GCC_PRI64 "i"
88 #define PRIo64 GCC_PRI64 "o"
90 #define PRIu64 GCC_PRI64 "u"
92 #define PRIx64 GCC_PRI64 "x"
94 #define PRIX64 GCC_PRI64 "X"
97 /* Various printf format strings for HOST_WIDE_INT. */
100 # define HOST_WIDE_INT_PRINT HOST_LONG_FORMAT
101 # define HOST_WIDE_INT_PRINT_C "L"
103 # define HOST_WIDE_INT_PRINT HOST_LONG_LONG_FORMAT
104 # define HOST_WIDE_INT_PRINT_C "LL"
107 #define HOST_WIDE_INT_PRINT_DEC "%" PRId64
108 #define HOST_WIDE_INT_PRINT_DEC_C "%" PRId64 HOST_WIDE_INT_PRINT_C
109 #define HOST_WIDE_INT_PRINT_UNSIGNED "%" PRIu64
110 #define HOST_WIDE_INT_PRINT_HEX "%#" PRIx64
111 #define HOST_WIDE_INT_PRINT_HEX_PURE "%" PRIx64
112 #define HOST_WIDE_INT_PRINT_DOUBLE_HEX "0x%" PRIx64 "%016" PRIx64
113 #define HOST_WIDE_INT_PRINT_PADDED_HEX "%016" PRIx64
115 /* Define HOST_WIDEST_FAST_INT to the widest integer type supported
116 efficiently in hardware. (That is, the widest integer type that fits
117 in a hardware register.) Normally this is "long" but on some hosts it
118 should be "long long" or "__int64". This is no convenient way to
119 autodetect this, so such systems must set a flag in config.host; see there
122 #ifdef USE_LONG_LONG_FOR_WIDEST_FAST_INT
123 # ifdef HAVE_LONG_LONG
124 # define HOST_WIDEST_FAST_INT long long
125 # define HOST_BITS_PER_WIDEST_FAST_INT HOST_BITS_PER_LONGLONG
127 # error "Your host said it wanted to use long long but that does not exist"
130 # define HOST_WIDEST_FAST_INT long
131 # define HOST_BITS_PER_WIDEST_FAST_INT HOST_BITS_PER_LONG
134 /* Inline functions operating on HOST_WIDE_INT. */
135 #if GCC_VERSION < 3004
137 extern int clz_hwi (unsigned HOST_WIDE_INT x);
138 extern int ctz_hwi (unsigned HOST_WIDE_INT x);
139 extern int ffs_hwi (unsigned HOST_WIDE_INT x);
141 /* Return the number of set bits in X. */
142 extern int popcount_hwi (unsigned HOST_WIDE_INT x);
144 /* Return log2, or -1 if not exact. */
145 extern int exact_log2 (unsigned HOST_WIDE_INT);
147 /* Return floor of log2, with -1 for zero. */
148 extern int floor_log2 (unsigned HOST_WIDE_INT);
150 /* Return the smallest n such that 2**n >= X. */
151 extern int ceil_log2 (unsigned HOST_WIDE_INT);
153 #else /* GCC_VERSION >= 3004 */
155 /* For convenience, define 0 -> word_size. */
157 clz_hwi (unsigned HOST_WIDE_INT x)
160 return HOST_BITS_PER_WIDE_INT;
161 # if HOST_BITS_PER_WIDE_INT == HOST_BITS_PER_LONG
162 return __builtin_clzl (x);
163 # elif HOST_BITS_PER_WIDE_INT == HOST_BITS_PER_LONGLONG
164 return __builtin_clzll (x);
166 return __builtin_clz (x);
171 ctz_hwi (unsigned HOST_WIDE_INT x)
174 return HOST_BITS_PER_WIDE_INT;
175 # if HOST_BITS_PER_WIDE_INT == HOST_BITS_PER_LONG
176 return __builtin_ctzl (x);
177 # elif HOST_BITS_PER_WIDE_INT == HOST_BITS_PER_LONGLONG
178 return __builtin_ctzll (x);
180 return __builtin_ctz (x);
185 ffs_hwi (unsigned HOST_WIDE_INT x)
187 # if HOST_BITS_PER_WIDE_INT == HOST_BITS_PER_LONG
188 return __builtin_ffsl (x);
189 # elif HOST_BITS_PER_WIDE_INT == HOST_BITS_PER_LONGLONG
190 return __builtin_ffsll (x);
192 return __builtin_ffs (x);
197 popcount_hwi (unsigned HOST_WIDE_INT x)
199 # if HOST_BITS_PER_WIDE_INT == HOST_BITS_PER_LONG
200 return __builtin_popcountl (x);
201 # elif HOST_BITS_PER_WIDE_INT == HOST_BITS_PER_LONGLONG
202 return __builtin_popcountll (x);
204 return __builtin_popcount (x);
209 floor_log2 (unsigned HOST_WIDE_INT x)
211 return HOST_BITS_PER_WIDE_INT - 1 - clz_hwi (x);
215 ceil_log2 (unsigned HOST_WIDE_INT x)
217 return floor_log2 (x - 1) + 1;
221 exact_log2 (unsigned HOST_WIDE_INT x)
223 return x == (x & -x) && x ? ctz_hwi (x) : -1;
226 #endif /* GCC_VERSION >= 3004 */
228 #define HOST_WIDE_INT_MIN (HOST_WIDE_INT) \
229 ((unsigned HOST_WIDE_INT) 1 << (HOST_BITS_PER_WIDE_INT - 1))
230 #define HOST_WIDE_INT_MAX (~(HOST_WIDE_INT_MIN))
232 extern HOST_WIDE_INT abs_hwi (HOST_WIDE_INT);
233 extern unsigned HOST_WIDE_INT absu_hwi (HOST_WIDE_INT);
234 extern HOST_WIDE_INT gcd (HOST_WIDE_INT, HOST_WIDE_INT);
235 extern HOST_WIDE_INT pos_mul_hwi (HOST_WIDE_INT, HOST_WIDE_INT);
236 extern HOST_WIDE_INT mul_hwi (HOST_WIDE_INT, HOST_WIDE_INT);
237 extern HOST_WIDE_INT least_common_multiple (HOST_WIDE_INT, HOST_WIDE_INT);
239 /* Sign extend SRC starting from PREC. */
241 static inline HOST_WIDE_INT
242 sext_hwi (HOST_WIDE_INT src, unsigned int prec)
244 if (prec == HOST_BITS_PER_WIDE_INT)
247 #if defined (__GNUC__)
249 /* Take the faster path if the implementation-defined bits it's relying
250 on are implemented the way we expect them to be. Namely, conversion
251 from unsigned to signed preserves bit pattern, and right shift of
252 a signed value propagates the sign bit.
253 We have to convert from signed to unsigned and back, because when left
254 shifting signed values, any overflow is undefined behavior. */
255 gcc_checking_assert (prec < HOST_BITS_PER_WIDE_INT);
256 int shift = HOST_BITS_PER_WIDE_INT - prec;
257 return ((HOST_WIDE_INT) ((unsigned HOST_WIDE_INT) src << shift)) >> shift;
261 /* Fall back to the slower, well defined path otherwise. */
262 gcc_checking_assert (prec < HOST_BITS_PER_WIDE_INT);
263 HOST_WIDE_INT sign_mask = HOST_WIDE_INT_1 << (prec - 1);
264 HOST_WIDE_INT value_mask = (HOST_WIDE_INT_1U << prec) - HOST_WIDE_INT_1U;
265 return (((src & value_mask) ^ sign_mask) - sign_mask);
270 /* Zero extend SRC starting from PREC. */
271 static inline unsigned HOST_WIDE_INT
272 zext_hwi (unsigned HOST_WIDE_INT src, unsigned int prec)
274 if (prec == HOST_BITS_PER_WIDE_INT)
278 gcc_checking_assert (prec < HOST_BITS_PER_WIDE_INT);
279 return src & (((unsigned HOST_WIDE_INT) 1 << prec) - 1);
283 /* Compute the absolute value of X. */
286 abs_hwi (HOST_WIDE_INT x)
288 gcc_checking_assert (x != HOST_WIDE_INT_MIN);
289 return x >= 0 ? x : -x;
292 /* Compute the absolute value of X as an unsigned type. */
294 inline unsigned HOST_WIDE_INT
295 absu_hwi (HOST_WIDE_INT x)
297 return x >= 0 ? (unsigned HOST_WIDE_INT)x : -(unsigned HOST_WIDE_INT)x;
300 #endif /* ! GCC_HWINT_H */