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Reintroduced example fib.c via examples/ folder

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This commit is contained in:
Aryadev Chavali
2023-10-23 04:25:30 +01:00
parent ac57e32a02
commit 0ac634a9be
2 changed files with 99 additions and 3 deletions
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23
Makefile
View File

@@ -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)

79
examples/fib.c Normal file
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@@ -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;
}