module Int64:64-bit integers.sig
..end
This module provides operations on the type int64
of
signed 64-bit integers. Unlike the built-in int
type,
the type int64
is guaranteed to be exactly 64-bit wide on all
platforms. All arithmetic operations over int64
are taken
modulo 264
Performance notice: values of type int64
occupy more memory
space than values of type int
, and arithmetic operations on
int64
are generally slower than those on int
. Use int64
only when the application requires exact 64-bit arithmetic.
val zero : int64
val one : int64
val minus_one : int64
val neg : int64 -> int64
val add : int64 -> int64 -> int64
val sub : int64 -> int64 -> int64
val mul : int64 -> int64 -> int64
val div : int64 -> int64 -> int64
Division_by_zero
if the second
argument is zero. This division rounds the real quotient of
its arguments towards zero, as specified for (/)
.val rem : int64 -> int64 -> int64
y
is not zero, the result
of Int64.rem x y
satisfies the following property:
x = Int64.add (Int64.mul (Int64.div x y) y) (Int64.rem x y)
.
If y = 0
, Int64.rem x y
raises Division_by_zero
.val succ : int64 -> int64
Int64.succ x
is Int64.add x Int64.one
.val pred : int64 -> int64
Int64.pred x
is Int64.sub x Int64.one
.val abs : int64 -> int64
val max_int : int64
val min_int : int64
val logand : int64 -> int64 -> int64
val logor : int64 -> int64 -> int64
val logxor : int64 -> int64 -> int64
val lognot : int64 -> int64
val shift_left : int64 -> int -> int64
Int64.shift_left x y
shifts x
to the left by y
bits.
The result is unspecified if y < 0
or y >= 64
.val shift_right : int64 -> int -> int64
Int64.shift_right x y
shifts x
to the right by y
bits.
This is an arithmetic shift: the sign bit of x
is replicated
and inserted in the vacated bits.
The result is unspecified if y < 0
or y >= 64
.val shift_right_logical : int64 -> int -> int64
Int64.shift_right_logical x y
shifts x
to the right by y
bits.
This is a logical shift: zeroes are inserted in the vacated bits
regardless of the sign of x
.
The result is unspecified if y < 0
or y >= 64
.val of_int : int -> int64
int
) to a 64-bit integer
(type int64
).val to_int : int64 -> int
int64
) to an
integer (type int
). On 64-bit platforms, the 64-bit integer
is taken modulo 263, i.e. the high-order bit is lost
during the conversion. On 32-bit platforms, the 64-bit integer
is taken modulo 231, i.e. the top 33 bits are lost
during the conversion.val of_float : float -> int64
Int64.min_int
, Int64.max_int
].val to_float : int64 -> float
val of_int32 : int32 -> int64
int32
)
to a 64-bit integer (type int64
).val to_int32 : int64 -> int32
int64
) to a
32-bit integer (type int32
). The 64-bit integer
is taken modulo 232, i.e. the top 32 bits are lost
during the conversion.val of_nativeint : nativeint -> int64
nativeint
)
to a 64-bit integer (type int64
).val to_nativeint : int64 -> nativeint
int64
) to a
native integer. On 32-bit platforms, the 64-bit integer
is taken modulo 232. On 64-bit platforms,
the conversion is exact.val of_string : string -> int64
0x
, 0o
or 0b
respectively.
Raise Failure "int_of_string"
if the given string is not
a valid representation of an integer, or if the integer represented
exceeds the range of integers representable in type int64
.val to_string : int64 -> string
val bits_of_float : float -> int64
val float_of_bits : int64 -> float
int64
.typet =
int64
val compare : t -> t -> int