NAME¶

Targetint - Target processor-native integers.

Module¶

Module Targetint

Documentation¶

Module Targetint
: sig end

Target processor-native integers.

This module provides operations on the type of signed 32-bit integers (on 32-bit target platforms) or signed 64-bit integers (on 64-bit target platforms). This integer type has exactly the same width as that of a pointer type in the C compiler. All arithmetic operations over are taken modulo 2^32 or 2^64 depending on the word size of the target architecture.

Warning: this module is unstable and part of Compiler_libs .

type t

The type of target integers.

val zero : t

The target integer 0.

val one : t

The target integer 1.

val minus_one : t

The target integer -1.

val neg : t -> t

Unary negation.

val add : t -> t -> t

Addition.

val sub : t -> t -> t

Subtraction.

val mul : t -> t -> t

Multiplication.

val div : t -> t -> t

Integer division. Raise Division_by_zero if the second argument is zero. This division rounds the real quotient of its arguments towards zero, as specified for (/) .

val unsigned_div : t -> t -> t

Same as Targetint.div , except that arguments and result are interpreted as unsigned integers.

val rem : t -> t -> t

Integer remainder. If y is not zero, the result of Targetint.rem x y satisfies the following properties: Targetint.zero <= Nativeint.rem x y < Targetint.abs y and x = Targetint.add (Targetint.mul (Targetint.div x y) y)
(Targetint.rem x y) . If y = 0 , Targetint.rem x y raises Division_by_zero .

val unsigned_rem : t -> t -> t

Same as Targetint.rem , except that arguments and result are interpreted as unsigned integers.

val succ : t -> t

Successor. Targetint.succ x is Targetint.add x Targetint.one .

val pred : t -> t

Predecessor. Targetint.pred x is Targetint.sub x Targetint.one .

val abs : t -> t

Return the absolute value of its argument.

val size : int

The size in bits of a target native integer.

val max_int : t

The greatest representable target integer, either 2^31 - 1 on a 32-bit platform, or 2^63 - 1 on a 64-bit platform.

val min_int : t

The smallest representable target integer, either -2^31 on a 32-bit platform, or -2^63 on a 64-bit platform.

val logand : t -> t -> t

Bitwise logical and.

val logor : t -> t -> t

Bitwise logical or.

val logxor : t -> t -> t

Bitwise logical exclusive or.

val lognot : t -> t

Bitwise logical negation.

val shift_left : t -> int -> t

Targetint.shift_left x y shifts x to the left by y bits. The result is unspecified if y < 0 or y >= bitsize , where bitsize is 32 on a 32-bit platform and 64 on a 64-bit platform.

val shift_right : t -> int -> t

Targetint.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 >= bitsize .

val shift_right_logical : t -> int -> t

Targetint.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 >= bitsize .

val of_int : int -> t

Convert the given integer (type int ) to a target integer (type t ), module the target word size.

val of_int_exn : int -> t

Convert the given integer (type int ) to a target integer (type t ). Raises a fatal error if the conversion is not exact.

val to_int : t -> int

Convert the given target integer (type t ) to an integer (type int ). The high-order bit is lost during the conversion.

val of_float : float -> t

Convert the given floating-point number to a target integer, discarding the fractional part (truncate towards 0). The result of the conversion is undefined if, after truncation, the number is outside the range [ Targetint.min_int , Targetint.max_int ].

val to_float : t -> float

Convert the given target integer to a floating-point number.

val of_int32 : int32 -> t

Convert the given 32-bit integer (type int32 ) to a target integer.

val to_int32 : t -> int32

Convert the given target integer to a 32-bit integer (type int32 ). On 64-bit platforms, the 64-bit native integer is taken modulo 2^32, i.e. the top 32 bits are lost. On 32-bit platforms, the conversion is exact.

val of_int64 : int64 -> t

Convert the given 64-bit integer (type int64 ) to a target integer.

val to_int64 : t -> int64

Convert the given target integer to a 64-bit integer (type int64 ).

val of_string : string -> t

Convert the given string to a target integer. The string is read in decimal (by default) or in hexadecimal, octal or binary if the string begins with 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 nativeint .

val to_string : t -> string

Return the string representation of its argument, in decimal.

val compare : t -> t -> int

The comparison function for target integers, with the same specification as compare . Along with the type t , this function compare allows the module Targetint to be passed as argument to the functors Set.Make and Map.Make .

val unsigned_compare : t -> t -> int

Same as Targetint.compare , except that arguments are interpreted as unsigned integers.

val equal : t -> t -> bool

The equal function for target ints.

type repr =
| Int32 of int32
| Int64 of int64

val repr : t -> repr

The concrete representation of a native integer.

val print : Format.formatter -> t -> unit

Print a target integer to a formatter.