Clipsey's Reduced Instruction Set Computing virtual toy CPU and assembler. CRISC is a single-file virtual CPU and assembler for a small toy architecture I made because i was bored.
To build CRISC, you need to have the DMD compiler installed.
Then run the following in the CRISC root folder.
make
sudo make install
You can add libcrisc as a package on dub to your project if you want to utilize this virtual CPU. http://code.dlang.org/packages/libcrisc
To assemble an crisc assembly file, use casm.
To run a crisc binary, use criscexec.
DO NOTE casm will automatically infer which mode you are going to use. So if you are working with registers, remember to suffix arguments with @ for registers/addresses.
| Instruction | Input A | Input B | ** Description** |
|---|---|---|---|
| HALT | Halts the execution of the program | ||
| MOV | REG A | REG B | Moves register A to register B |
| MOVC | CONST A | REG B | Moves const A to register B |
| ADD | REG A | REG B | Adds register A to register B |
| ADDC | CONST A | REG B | Adds const A to register B |
| SUB | REG A | REG B | Subtracts register A to register B |
| SUBC | CONST A | REG B | Subtracts const A to register B |
| MUL | REG A | REG B | Multiplies register A to register B |
| MULC | CONST A | REG B | Multiplies const A to register B |
| DIV | REG A | REG B | Divides register A to register B |
| DIVC | CONST A | REG B | Divides const A to register B |
| JMP | ADDRESS A | Jumps to address A | |
| JMPEQ | ADDRESS A | REG B | Jumps to address A if B is equal to value in status register |
| JMPNEQ | ADDRESS A | REG B | Jumps to address A if B is not equal to value in status register |
| JMPLEQ | ADDRESS A | REG B | Jumps to address A if B is larger than or equal to value in status register |
| JMPSEQ | ADDRESS A | REG B | Jumps to address A if B is smallerthan or equal to value in status register |
| JMPC | CONST ADDRESS A | Jumps to address A | |
| JMPEQC | ADDRESS A | CONST B | Jumps to address A if B is equal to value in status register |
| JMPNEQC | ADDRESS A | CONST B | Jumps to address A if B is not equal to value in status register |
| JMPLEQC | ADDRESS A | CONST B | Jumps to address A if B is larger than or equal to value in status register |
| JMPSEQC | ADDRESS A | CONST B | Jumps to address A if B is smallerthan or equal to value in status register |
| LDR | REG A | ADDRESS B | Load memory from address B in to register A |
| LDRC | CONST A | ADDRESS B | Load memory from const B in to register A |
| STR | REG A | ADDRESS B | Store memory from register A in to address B (in memory) |
| STRC | CONST A | ADDRESS B | Store memory from const A in to address B (in memory) |
| CALL | ADDRESS A | Call address A | |
| PUSH | REG A | Push value from register A to stack | |
| PUSHC | CONST A | Push constant value to stack | |
| POP | REG A | Pop value from stack to register A | |
| RET | Return from subroutine | ||
| DBG | DBG OPTION A | CONST B | Set debugging options |