diff options
| -rw-r--r-- | Makefile | 23 | ||||
| -rw-r--r-- | examples/fib.c | 79 |
2 files changed, 99 insertions, 3 deletions
@@ -23,19 +23,24 @@ VM_DIST=$(DIST)/vm VM_SRC=vm VM_CODE:=$(addprefix $(VM_SRC)/, inst.c runtime.c) VM_OBJECTS:=$(VM_CODE:$(VM_SRC)/%.c=$(VM_DIST)/%.o) -VM_DEPS:=$(VM_OBJECTS:%.o=%.d) $(VM_DIST)/fib.d $(VM_DIST)/main.d +VM_DEPS:=$(VM_OBJECTS:%.o=%.d) $(VM_DIST)/main.d VM_VERBOSE=0 VM_CFLAGS:=$(CFLAGS) -D VERBOSE=$(VM_VERBOSE) VM_OUT=$(DIST)/ovm.out +## EXAMPLES setup +EXAMPLES_DIST=$(DIST)/examples +EXAMPLES_SRC=examples +EXAMPLES_CFLAGS=$(CFLAGS) +EXAMPLES=$(DIST)/fib.out + # Things you want to build on `make` all: $(DIST) lib vm examples lib: $(LIB_DIST) $(LIB_OBJECTS) vm: $(VM_DIST) $(VM_OUT) -examples: vm-examples -vm-examples: $(VM_DIST) $(VM_DIST)/fib.out +examples: $(EXAMPLES_DIST) $(EXAMPLES) # Recipes ## LIB Recipes @@ -56,6 +61,15 @@ $(VM_DIST)/%.o: $(VM_SRC)/%.c @$(CC) $(VM_CFLAGS) -MMD -c $< -o $@ $(LIBS) @echo -e "$(TERM_GREEN)$@$(TERM_RESET)" +## EXAMPLES recipes +$(DIST)/fib.out: $(LIB_OBJECTS) $(VM_OBJECTS) $(ASM_OBJECTS) $(EXAMPLES_DIST)/fib.o + @$(CC) $(EXAMPLES_CFLAGS) $^ -o $@ $(LIBS) + @echo -e "$(TERM_GREEN)$@$(TERM_RESET)" + +$(EXAMPLES_DIST)/%.o: $(EXAMPLES_SRC)/%.c + @$(CC) $(EXAMPLES_CFLAGS) -MMD -c $< -o $@ $(LIBS) + @echo -e "$(TERM_GREEN)$@$(TERM_RESET)" + OUT= ARGS= .PHONY: run @@ -75,3 +89,6 @@ $(LIB_DIST): $(VM_DIST): mkdir -p $(VM_DIST) + +$(EXAMPLES_DIST): + mkdir -p $(EXAMPLES_DIST) diff --git a/examples/fib.c b/examples/fib.c new file mode 100644 index 0000000..17a9ef8 --- /dev/null +++ b/examples/fib.c @@ -0,0 +1,79 @@ +/* Copyright (C) 2023 Aryadev Chavali + + * You may distribute and modify this code under the terms of the GPLv2 + * license. You should have received a copy of the GPLv2 license with + * this file. If not, please write to: aryadev@aryadevchavali.com. + + * Created: 2023-10-23 + * Author: Aryadev Chavali + * Description: An example virtual machine program which computes and + * prints fibonacci numbers. Note that by default the virtual machine + * just rolls overflows over, so this program will never terminate. + */ + +#include <assert.h> +#include <stdio.h> +#include <string.h> + +#include "../vm/inst.h" +#include "../vm/runtime.h" + +int main(void) +{ + inst_t instructions[] = { + // MOV the values 1 and 1 to REG[0] and REG[1] respectively + INST_PUSH(WORD, 1), + INST_MOV(WORD, 0), + INST_PUSH(WORD, 1), + INST_MOV(WORD, 1), + + // Print value at register 0 with newline. + INST_PUSH_REG(WORD, 0), // <-- # + INST_PRINT(WORD), + INST_PUSH(BYTE, '\n'), + INST_PRINT(CHAR), + + // Print value at register 1 with newline + INST_PUSH_REG(WORD, 1), + INST_PRINT(WORD), + INST_PUSH(BYTE, '\n'), + INST_PRINT(CHAR), + + /* Compute the next pair of fibonacci numbers */ + // REG[0] + REG[1] + INST_PUSH_REG(WORD, 0), + INST_PUSH_REG(WORD, 1), + INST_PLUS(WORD), + + // Mov REG[0] + REG[1] to REG[0] + INST_MOV(WORD, 0), + + // REG[0] + REG[1] + INST_PUSH_REG(WORD, 0), + INST_PUSH_REG(WORD, 1), + INST_PLUS(WORD), + + // Mov REG[0] + REG[1] to REG[1] + INST_MOV(WORD, 1), + + // Jump to the point # + INST_JUMP_ABS(4), + INST_HALT, + }; + + byte stack[256]; + vm_t vm = {0}; + vm_load_stack(&vm, stack, ARR_SIZE(stack)); + vm_load_program(&vm, instructions, ARR_SIZE(instructions)); + err_t err = vm_execute_all(&vm); + + if (err) + { + const char *error_str = err_as_cstr(err); + fprintf(stderr, "[ERROR]: %s\n", error_str); + fprintf(stderr, "[ERROR]: VM Trace:\n"); + vm_print_all(&vm, stderr); + return 255 - err; + } + return 0; +} |