nim-stint/stint/private/int_mul.nim

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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, ./uint_mul
func `*`*[T](x, y: IntImpl[T]): IntImpl[T] {.inline.}=
## Multiplication for multi-precision signed integers
# For 2-complement representation this is the exact same
# as unsigned multiplication. We don't need to deal with the sign
# TODO: overflow detection.
cast[type result](cast[UIntImpl[T]](x) * cast[UIntImpl[T]](y))