MPC(1) MPC(1)
NAME
mpc - extended precision arithmetic code generator
SYNOPSIS
mpc [ file ... ]
DESCRIPTION
Mpc generates C functions from a simple language that oper-
ates on extended precision integers using the mp(2) library.
LANGUAGE
The language consists of a series of function definitions of
the form:
name ( parameter list ) { statements }
All variables and parameters are extended precision integers
and are passed by reference. Statements are separated by
semicolon and the following statemens are defined:
name = expression
if ( condition ) { statements } else if ( condition ) {
statements } else { statements }
while ( condition ) { statements }
break
name ( parameter list )
mod ( modulus ) { statements }
There is no distinction between input and output parameters,
but conventionally, the outputs are put at the end of the
parameter list and the language allows one to write
F ( X, Y, Z ) as Y, Z = F ( X )
Expressions are composed out of the following arithmetic
operations:
+ addition.
- subtraction.
* multiplication.
/ division, or multiplicative inverse when
enclosed in mod block.
% division remainder.
^ exponentiation.
>>constant right shift by a constant.
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MPC(1) MPC(1)
<<constant left shift by a constant.
condition?a:b pick a when condition is true, otherwise
b when false.
Conditions can use the following operations:
== equality.
!= inequality.
> bigger than.
< smaller than.
!condition negation.
SOURCE
/sys/src/cmd/mpc.y
SEE ALSO
mp(2)
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