Imager::Expr::Assem - an assembler for producing code for the Imager

       Tony Cook <tony@develop-help.com>

perl v5.40.1                                       2025-03-16                           Imager::Expr::Assem(3pm)

       Note that the current optimizer may  produce  incorrect  optimization  for  your  code,  fortunately  the
       optimizer  will  disable itself if you include any jump operator in your code.  A single jump to anywhere
       after your final "ret" operator can be used to disable the optimizer without slowing down your code.

       There's currently no high-level code generation that can generate code with loops or real conditions.

       This module is a simple Imager::Expr compiler that compiles a low-level language that has a nearly 1-to-1
       relationship to the internal representation used for compiled register machine code.

   Syntax
       Each line can contain multiple statements separated by semi-colons.

       Anything after '#' in a line is ignored.

       Types of statements:

       variable definition
               "var" name:type

           defines  variable  name to have type, which can be any of "n" or "num" for a numeric type or "pixel",
           "p" or "c" for a pixel or color type.

           Variable names cannot include white-space.

       operators
           Operators can be split into 3 basic types, those that have a result value, those that don't  and  the
           null operator, eg. jump has no value.

           The format for operators that return a value is typically:

               result = operatoroperand ...

           and for those that don't return a value:

               operatoroperand

           where operator is any valid register machine operator, result is any variable defined with "var", and
           operands are variables, constants or literals, or for jump operators, labels.

           The set operator can be simplified to:

               result = operator

           All  operators maybe preceded by a label, which is any non-white-space text immediately followed by a
           colon (':').

         Imager::Expr::Assem - an assembler for producing code for the Imager
         register machine

Imager(3), transform.perl, regmach.c

         use Imager::Expr::Assem;
         my $expr = Imager::Expr->new(assem=>'...', ...)