hmul.3

UNIX v6源代码 这几乎是最经典的unix版本 unix操作系统设计和莱昂氏unix源代码分析都是用的该版

.th HMUL III 4/7/73
.sh NAME
hmul \*- high-order product
.sh SYNOPSIS
.ft B
hmul(x, y)
.ft R
.sh DESCRIPTION
.it Hmul
returns the high-order 16 bits of the product of
.bd x
and
.bd y.
(The binary multiplication operator generates
the low-order 16 bits of a product.)
.sh BUGS