The Calyx Interpreter
The experimental Calyx interpreter resides in the
interp/ directory of the
The interpreter supports all Calyx programs—from high-level programs that
make heavy use of control operators, to fully lowered Calyx programs.
(RTL simulation, in contrast, only supports execution of fully lowered programs.)
There are two ways to use the interpreter: you can directly invoke it, or you can use fud.
To run an example program, try:
cd interp && cargo run tests/control/if.futil
You can see the available command-line options by typing
cargo run -- --help.
Interpreting via fud
The interpreter is available as a stage in fud, which lets you provide standard JSON data files as input and easily execute passes on the input Calyx program before interpretation.
You'll want to build the interpreter first:
cd interp && cargo build
Here's how to run a Calyx program:
fud e --to interpreter-out interp/tests/control/if.futil
To provide input data, set the
verilog.data variable, like so:
fud e --to interpreter-out \ -s verilog.data tests/correctness/while.futil.data \ tests/correctness/while.futil
By default, fud will not transform the Calyx code before feeding it to the interpreter.
To run passes before the interpreter, use the
calyx.flags variable in conjunction with the
For example, to fully lower the Calyx program before interpreting it:
fud e --to interpreter-out \ -s calyx.flags '-p all' \ interp/tests/control/if.futil