This project was done to compare the speeds between c and go regarding a forth Virtual Machine. Go proved to increase the speed of the virtual machine compared to c by about 10-15%. Further inline coding increased the speed to 30% but no higher.
ceForth (version 23) by C.H.Ting is ported to golang under this repository.
ceForth is a forth virtual machine coded in c but it's memory Data[4096] register, which host the kernel, was compiled using F#.
As such, it has been very hard to understand the compiled kernel and colon words. I leave it to the reader to refer to link below for further understanding of the ceForth virtual machine.
# make sure you have go1.12 or higher
# install library
go get -u github.com/fdamador/eForth
# Test eForth library
go run main.go
# Compile eForth library
go build .
# Example1: Run Words Commands shows all available reverse-polish notation commands called Dictionary.
0 0 0 0 ok> words
# Example2: 1 + 3 shows the result on the top of the data stack
0 0 0 0 ok> 1 3 +
1 3 +
0 0 0 4 ok>
# Stack Comments:
# Stack inputs and outputs are shown in the form: (input1 input2 ... -- output1 output2 ... )
# Stack Abbreviations of Data Types
# n 32 bit integer
# d 64 bit integer
# flag Boolean flag, either 0 or -1
# char ASCII character or a byte
# addr 32 bit address
# Example3: creating a new word
# : Name ( input - output ) commands ;
0 0 0 0 ok> : squared ( n - n*n ) dup dup * swap drop ;
: square dup dup * swap drop ;
0 0 0 0 ok>4 square
4 square
0 0 0 10 ok>
# By defaul the system is in HEX. To see stack in DECIMAL, then type DECIMAL
0 0 0 10 ok>DECIMAL
DECIMAL
0 0 0 16 ok>
# Exit will copy of modified program memory `Data[4096]`, where * is the data-time stamp. This can be reused to compile an updated memorey map.
0 0 0 0 ok> bye
bye
wrote *_rom.txt
# Exit without modified program memory
0 0 0 0 ok> <CLR+c>
The project is stale and won't have further updates. It is being uploaded for recording purposes.
There is no guarantee of Stability.