274fcf8d1f
- neg64(a) == -a - although we only support 64 bit unsigned arithmetics sometimes it's good to have a 2-complement negative number
53 lines
1.5 KiB
C
53 lines
1.5 KiB
C
/* minix/u64.h Author: Kees J. Bot
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* 7 Dec 1995
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* Functions to manipulate 64 bit disk addresses.
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*/
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#ifndef _MINIX__U64_H
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#define _MINIX__U64_H
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#ifndef _TYPES_H
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#include <minix/types.h>
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#endif
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u64_t add64(u64_t i, u64_t j);
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u64_t add64u(u64_t i, unsigned j);
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u64_t add64ul(u64_t i, unsigned long j);
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u64_t sub64(u64_t i, u64_t j);
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u64_t sub64u(u64_t i, unsigned j);
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u64_t sub64ul(u64_t i, unsigned long j);
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int bsr64(u64_t i);
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unsigned diff64(u64_t i, u64_t j);
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u64_t cvu64(unsigned i);
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u64_t cvul64(unsigned long i);
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unsigned cv64u(u64_t i);
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unsigned long cv64ul(u64_t i);
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u64_t div64(u64_t i, u64_t j);
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unsigned long div64u(u64_t i, unsigned j);
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u64_t div64u64(u64_t i, unsigned j);
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u64_t rem64(u64_t i, u64_t j);
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unsigned rem64u(u64_t i, unsigned j);
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u64_t mul64(u64_t i, u64_t j);
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u64_t mul64u(unsigned long i, unsigned j);
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int cmp64(u64_t i, u64_t j);
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int cmp64u(u64_t i, unsigned j);
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int cmp64ul(u64_t i, unsigned long j);
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unsigned long ex64lo(u64_t i);
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unsigned long ex64hi(u64_t i);
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u64_t make64(unsigned long lo, unsigned long hi);
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u64_t rrotate64(u64_t x, unsigned short b);
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u64_t rshift64(u64_t x, unsigned short b);
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u64_t xor64(u64_t a, u64_t b);
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u64_t and64(u64_t a, u64_t b);
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u64_t not64(u64_t a);
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#define is_zero64(i) ((i).lo == 0 && (i).hi == 0)
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#define make_zero64(i) do { (i).lo = (i).hi = 0; } while(0)
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#define neg64(i) do { \
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(i).lo = ~(i).lo; \
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(i).hi = ~(i).hi; \
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(i) = add64u((i), 1); \
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} while(0)
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#endif /* _MINIX__U64_H */
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