89 lines
2.4 KiB
C
89 lines
2.4 KiB
C
/*
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This file defines sane integer types for our target platforms. This
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library only runs on machines with the following characteristics:
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- supports integer word sizes of 8, 16, 32, and 64 bits
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- uses unsigned and signed 2's complement representations
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- all pointer types are the same size
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- there is an integer type with the same size as a pointer
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Some features require:
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- IEEE 754 single- and double-precision floating point
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We assume the LP64 convention for 64-bit platforms.
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*/
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#undef BITS32 // TODO
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#define BITS64 // TODO
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#ifdef __WATCOMC__
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typedef float float_t;
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typedef double double_t;
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#endif
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#ifdef __GNUC__
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#define EXTERN_NORETURN(ret, args) extern ret args __attribute__((__noreturn__))
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#define STATIC_NORETURN(ret, args) static ret args __attribute__((__noreturn__))
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#endif
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#ifdef _MSC_VER
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#define EXTERN_NORETURN(ret, args) __declspec(noreturn) extern ret args
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#define STATIC_NORETURN(ret, args) __declspec(noreturn) static ret args
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#endif
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#ifdef __WATCOMC__
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#pragma aux noreturn aborts;
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#define EXTERN_NORETURN(ret, args) extern ret __pragma("noreturn") args
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#define STATIC_NORETURN(ret, args) static ret __pragma("noreturn") args
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#endif
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#define LLT_ALLOC(n) malloc(n)
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#define LLT_REALLOC(p, n) realloc((p), (n))
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#define LLT_FREE(x) free(x)
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typedef int bool_t;
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#ifdef BITS64
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#define TOP_BIT 0x8000000000000000
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#define NBITS 64
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#else
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#define TOP_BIT 0x80000000
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#define NBITS 32
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#endif
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#define LLT_ALIGN(x, sz) (((x) + (sz - 1)) & (-sz))
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// branch prediction annotations
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#ifdef __GNUC__
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#define __unlikely(x) __builtin_expect(!!(x), 0)
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#define __likely(x) __builtin_expect(!!(x), 1)
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#else
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#define __unlikely(x) (x)
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#define __likely(x) (x)
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#endif
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#define DBL_MAXINT 9007199254740992LL
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#define FLT_MAXINT 16777216
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#define U64_MAX 18446744073709551615ULL
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#define S64_MAX 9223372036854775807LL
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#define S64_MIN (-S64_MAX - 1LL)
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#define BIT63 0x8000000000000000LL
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#define BIT31 0x80000000
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#define LOG2_10 3.3219280948873626
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#define sign_bit(r) ((*(int64_t *)&(r)) & BIT63)
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#define LABS(n) (((n) ^ ((n) >> (NBITS - 1))) - ((n) >> (NBITS - 1)))
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#define NBABS(n, nb) (((n) ^ ((n) >> ((nb)-1))) - ((n) >> ((nb)-1)))
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#define DFINITE(d) \
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(((*(int64_t *)&(d)) & 0x7ff0000000000000LL) != 0x7ff0000000000000LL)
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#define DNAN(d) ((d) != (d))
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extern double D_PNAN;
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extern double D_NNAN;
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extern double D_PINF;
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extern double D_NINF;
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extern float F_PNAN;
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extern float F_NNAN;
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extern float F_PINF;
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extern float F_NINF;
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