add the same example using dynasm.

c/jit/.gitignore

@@ -1,3 +1,7 @@
/luajit
/dynasm-driver.c
/hello_jit
/hello_dynasm
/hello_dynasm.c

c/jit/Makefile

@@ -1,3 +1,16 @@
CFLAGS=-Iluajit
hello_dynasm: hello_dynasm.c dynasm-driver.c
	$(CC) $(CFLAGS) -o hello_dynasm dynasm-driver.c -DJIT=\"hello_dynasm.c\"
%.c: %.dasc
	./dynasm -o $@ $<
%.dasc: dynasm
dynasm-driver.c:
	curl -O https://raw.githubusercontent.com/haberman/jitdemo/master/dynasm-driver.c
dynasm: luajit
luajit:

c/jit/hello_dynasm.dasc

@@ -0,0 +1,27 @@
|.arch x64
|.actionlist actions
#define Dst &state
int main(int argc, char *argv[]) {
	if (argc < 2) {
		fprintf(stderr, "Usage: hello_dynasm <integer>\n");
		return 1;
	}
	int num = atoi(argv[1]);
	dasm_State *state;
	initjit(&state, actions);
	| mov eax, num
	| ret
	int (*func)() = jitcode(&state);
	int ret = func();
	assert(num == ret);
	free_jitcode(func);
	return ret;
}