Add tests for memory address handling, fix compiler for negative constant

3 files changed, 15 insertions, 1 deletions

diff --git a/pp2cc.py b/pp2cc.py
index 2f58f9b..81f6a79 100755
--- a/pp2cc.py
+++ b/pp2cc.py
@@ -1317,7 +1317,8 @@ class Parse(object):
                                                               linked_node))
                 if op == "-":
                     # negating a value in PP2 is flipping the WORDSIZE-th bit
-                    value = operand ^ msb
+                    value = -operand
+                    #(operand ^ (pow(2, self.WORDSIZE) - 1)) + 1
                 elif op == "~":
                     # invert all bits
                     value = operand ^ (pow(2, self.WORDSIZE) - 1)
diff --git a/tests/params.c b/tests/params.c
index 2232fdd..2073000 100644
--- a/tests/params.c
+++ b/tests/params.c
@@ -3,9 +3,16 @@ int square(int x) {
     res = x * x;
     return res;
 }
+int div(int a, int b) {
+    int aa = -a;
+    int bb = 1 * b;
+    return aa / bb;
+}
 int main() {
     int x;
     x = square(9);// 81
     e:goto e;
+    x = div(-150, 10);// 15
+    ef:goto ef;
     return x;
 }
diff --git a/tests/read-timer.c b/tests/read-timer.c
new file mode 100644
index 0000000..d7bb2c3
--- /dev/null
+++ b/tests/read-timer.c
@@ -0,0 +1,6 @@
+int timer;
+int *timerp = (int*)-3;
+void main() {
+    timer = *timerp;
+    g:goto g;
+}