24 lines
967 B
Nim
24 lines
967 B
Nim
# Stint
|
|
# Copyright 2018 Status Research & Development GmbH
|
|
# Licensed under either of
|
|
#
|
|
# * Apache License, version 2.0, ([LICENSE-APACHE](LICENSE-APACHE) or http://www.apache.org/licenses/LICENSE-2.0)
|
|
# * MIT license ([LICENSE-MIT](LICENSE-MIT) or http://opensource.org/licenses/MIT)
|
|
#
|
|
# at your option. This file may not be copied, modified, or distributed except according to those terms.
|
|
|
|
import ./datatypes, ./int_bitwise_ops, ./as_words, ./initialization
|
|
|
|
func high*[T](_: typedesc[IntImpl[T]]): IntImpl[T] {.inline.}=
|
|
# The highest signed int has representation
|
|
# 0b0111_1111_1111_1111 ....
|
|
# so we only have to unset the most significant bit.
|
|
result = not result
|
|
most_significant_word(result) = most_significant_word(result) shr 1
|
|
|
|
func low*[T](_: typedesc[IntImpl[T]]): IntImpl[T] {.inline.}=
|
|
# The lowest signed int has representation
|
|
# 0b1000_0000_0000_0000 ....
|
|
# so we only have to set the most significant bit.
|
|
not high(IntImpl[T])
|