SSP Small SmallC Compiler for the prop reaches about factor 5 to spin: Experime
Christof Eb.
Posts: 1,161
Hello,
perhaps this is now of some use (or fun?) to somebody. It is still far from beeing without bugs. And it is not complete, but perhaps someone wants to play with it too.
"Small SmallC for the Prop" reaches about speed factor 5 compared to spin. (Factor 5.5 in the given example)
I think I will not try to make a long memory modell after this result, because then the speed will be no greater than spin. A compiler for a long memory modell will have to be better.... That was discussed in http://forums.parallax.com/forums/default.aspx?f=25&m=177100
It uses a small memory modell running in cog ram and is therefore rather limited in code length.
It uses only long vars, declared as int.
Global vars are fast and in cog ram like registers.
Local variables are placed in main ram on a stack.
Division gives only 16bit result at the moment. (I tend to want to work on this...)
Between #asm and #endasm you can add pure assembler code or pass other things to the spin system.
Long or negative constants have to be treated like global variables, see example.
Functions, function calls,
if-then-else, while, for(;[noparse];)[/noparse],
local (stack) variables, global (cog-ram) variables, local arrays, register access, pointers,
Addition, Subtraction, Multiply, Division, >>, << , > , <,
&, ! ,
seem to work.
The file StartPro.c has to be included and will provide the interface to the spin environment.
The batch file ccs.bat
ccs filename
will make a filename.spin from filename.c.
The batch file ccssp will compile the compiler after you have modified ssp4.c. In this file the assembler code, that is produced, is defined.
I am posting this now, because I am going to abandon this project now at least for a while.
Nevertheless I would be interested in feedback or if someone will try this.
Christof
perhaps this is now of some use (or fun?) to somebody. It is still far from beeing without bugs. And it is not complete, but perhaps someone wants to play with it too.
"Small SmallC for the Prop" reaches about speed factor 5 compared to spin. (Factor 5.5 in the given example)
I think I will not try to make a long memory modell after this result, because then the speed will be no greater than spin. A compiler for a long memory modell will have to be better.... That was discussed in http://forums.parallax.com/forums/default.aspx?f=25&m=177100
It uses a small memory modell running in cog ram and is therefore rather limited in code length.
It uses only long vars, declared as int.
Global vars are fast and in cog ram like registers.
Local variables are placed in main ram on a stack.
Division gives only 16bit result at the moment. (I tend to want to work on this...)
Between #asm and #endasm you can add pure assembler code or pass other things to the spin system.
Long or negative constants have to be treated like global variables, see example.
Functions, function calls,
if-then-else, while, for(;[noparse];)[/noparse],
local (stack) variables, global (cog-ram) variables, local arrays, register access, pointers,
Addition, Subtraction, Multiply, Division, >>, << , > , <,
&, ! ,
seem to work.
The file StartPro.c has to be included and will provide the interface to the spin environment.
The batch file ccs.bat
ccs filename
will make a filename.spin from filename.c.
The batch file ccssp will compile the compiler after you have modified ssp4.c. In this file the assembler code, that is produced, is defined.
I am posting this now, because I am going to abandon this project now at least for a while.
Nevertheless I would be interested in feedback or if someone will try this.
Christof
Comments
Best regards and keep up the good work!!