add loop example

4 files changed, 47 insertions, 0 deletions

diff --git a/example/Makefile b/example/Makefile
new file mode 100644
index 0000000..66c96a0
--- /dev/null
+++ b/example/Makefile
@@ -0,0 +1,17 @@
+CFLAGS = -Wall -Wextra -g -O2
+
+all: exec
+
+exec: bcode.o main.o
+	$(CC) $(CFLAGS) $^ -o $@
+
+bcode.o: ../bcode.c
+	$(CC) $(CFLAGS) -c $^ -o $@
+
+../bcode.c: rules.py
+	cd .. && ./bcgen example/rules.py
+	touch ../bcode.c # just to get make to wake up
+
+.PHONY: clean
+clean:
+	rm -rf *.o exec
diff --git a/example/exec b/example/exec
new file mode 100755
index 0000000..2189325
--- /dev/null
+++ b/example/exec
diff --git a/example/main.c b/example/main.c
new file mode 100644
index 0000000..7ca152b
--- /dev/null
+++ b/example/main.c
@@ -0,0 +1,25 @@
+#include <stdio.h>
+#include "../bcode.h"
+
+int main()
+{
+	struct compile_state cs;
+	init(&cs);
+
+	select_movi(&cs, 2, 0); // i
+	select_movi(&cs, 1, 1000000000); // limit
+	select_movi(&cs, 0, 0); // total
+
+	breg_t l = label(&cs); // top
+	select_addr(&cs, 0, 0, 2); // add iter to total
+	select_addi(&cs, 2, 2, 1);
+	breloc_t r = select_bltr(&cs, 2, 1, 0); // 0 is placeholder value,
+						// should maybe add in an
+						// UNDEFINED macro or something
+	end(&cs);
+
+	patch(&cs, r, l);
+
+	printf("%llu\n", (unsigned long long)run(&cs));
+	destroy(&cs);
+}
diff --git a/example/rules.py b/example/rules.py
new file mode 100644
index 0000000..9c8d62e
--- /dev/null
+++ b/example/rules.py
@@ -0,0 +1,5 @@
+g = BCGen(r = 7, f = 0)
+g.rule('addr',   '_RRR__', 'R0 = R1 + R2;')
+g.rule('addi',   '_RR__I', 'R0 = R1 + IMM;')
+g.rule('movi',   '_R___I', 'R0 = IMM;')
+g.rule('bltr',   'rRR__I', 'if (R0 < R1) JUMP(IMM);')