diff options
Diffstat (limited to 'src/internals.h')
| -rw-r--r-- | src/internals.h | 51 |
1 files changed, 49 insertions, 2 deletions
diff --git a/src/internals.h b/src/internals.h index c1153ea..c859ce1 100644 --- a/src/internals.h +++ b/src/internals.h @@ -4,7 +4,11 @@ #include <string.h> #include <stdlib.h> #include <errno.h> -#include <limits.h> + +/* clang pretends to be GCC... */ +#if defined(__GNUC__) && defined(__clang__) +# undef __GNUC__ +#endif #define BITS_PER_CHAR 64 #define LB_BITS_PER_CHAR 6 @@ -14,6 +18,32 @@ #define CEILING_BITS_TO_CHARS(bits) (((bits) + (BITS_PER_CHAR - 1)) >> LB_BITS_PER_CHAR) #define BITS_IN_LAST_CHAR(bits) ((bits) & (BITS_PER_CHAR - 1)) +#if defined(__GNUC__) +# define O0 __attribute__((optimize("O0"))) +# define O1 __attribute__((optimize("O1"))) +# define O2 __attribute__((optimize("O2"))) +# define O3 __attribute__((optimize("O3"))) +# define Ofast __attribute__((optimize("Ofast"))) +# define Os __attribute__((optimize("Os"))) +# define Oz __attribute__((optimize("Os"))) +#elif defined(__clang__) +# define O0 __attribute__((optnone)) +# define O1 /* Don't know how. */ +# define O2 /* Don't know how. */ +# define O3 /* Don't know how. */ +# define Ofast /* Don't know how. */ +# define Os /* Don't know how. */ +# define Oz /* Don't know how. */ +#else +# define O0 /* Don't know how. */ +# define O1 /* Don't know how. */ +# define O2 /* Don't know how. */ +# define O3 /* Don't know how. */ +# define Ofast /* Don't know how. */ +# define Os /* Don't know how. */ +# define Oz /* Don't know how. */ +#endif + #define LIST_TEMPS\ X(libzahl_tmp_cmp)\ X(libzahl_tmp_str_num)\ @@ -77,13 +107,14 @@ extern size_t libzahl_pool_alloc[sizeof(size_t) * 8]; #define TRIM(a) for (; (a)->used && !(a)->chars[(a)->used - 1]; (a)->used--) #define TRIM_NONZERO(a) for (; !(a)->chars[(a)->used - 1]; (a)->used--) #define TRIM_AND_ZERO(a) do { TRIM(a); if (!(a)->used) SET_SIGNUM(a, 0); } while (0) +#define TRIM_AND_SIGN(a, s) do { TRIM(a); SET_SIGNUM(a, (a)->used ? (s) : 0); } while (0) #define znegative(a) (zsignum(a) < 0) #define znegative1(a, b) ((zsignum(a) | zsignum(b)) < 0) #define znegative2(a, b) ((zsignum(a) & zsignum(b)) < 0) #define zpositive(a) (zsignum(a) > 0) #define zpositive1(a, b) (zpositive(a) + zpositive(b) > 0) #define zpositive2(a, b) (zsignum(a) + zsignum(b) == 2) -#define zzero1(a, b) (zzero(a) + zzero(b) > 0) +#define zzero1(a, b) (zzero(a) || zzero(b)) #define zzero2(a, b) (!(zsignum(a) | zsignum(b))) #define zmemmove(d, s, n) memmove((d), (s), (n) * sizeof(zahl_char_t)) @@ -138,3 +169,19 @@ libzahl_msb_nz_llu(unsigned long long int x) return r; } #endif + +#if defined(__GNUC__) || defined(__clang__) +# if INT64_MAX == LONG_MAX +# define libzahl_add_overflow(rp, a, b) __builtin_uaddl_overflow(a, b, rp) +# else +# define libzahl_add_overflow(rp, a, b) __builtin_uaddll_overflow(a, b, rp) +# endif +#else +static inline int +libzahl_add_overflow(zahl_char_t *rp, zahl_char_t a, zahl_char_t b) +{ + int carry = ZAHL_CHAR_MAX - a < b; + *rp = a + b; + return carry; +} +#endif |