From 21e4016317af3eaf03ffc36bfd90a7a2af4a354f Mon Sep 17 00:00:00 2001
From: Yann Herklotz <ymherklotz@gmail.com>
Date: Tue, 28 Mar 2017 17:00:19 +0100
Subject: Working array arithmatic

---
 c_compiler/src/expression.cpp                       | 18 +++++++++++++++---
 test_deliverable/testcases/test_MULTARR1.c          |  9 +++++++++
 test_deliverable/testcases/test_MULTARR1_driver.c   |  6 ++++++
 test_deliverable/testcases/test_POINTERAD0.c        |  7 +++++++
 test_deliverable/testcases/test_POINTERAD0_driver.c |  4 ++++
 test_deliverable/testcases/test_POINTERADD.c        |  4 ++++
 test_deliverable/testcases/test_POINTERADD_driver.c |  7 +++++++
 7 files changed, 52 insertions(+), 3 deletions(-)
 create mode 100644 test_deliverable/testcases/test_MULTARR1.c
 create mode 100644 test_deliverable/testcases/test_MULTARR1_driver.c
 create mode 100644 test_deliverable/testcases/test_POINTERAD0.c
 create mode 100644 test_deliverable/testcases/test_POINTERAD0_driver.c
 create mode 100644 test_deliverable/testcases/test_POINTERADD.c
 create mode 100644 test_deliverable/testcases/test_POINTERADD_driver.c

diff --git a/c_compiler/src/expression.cpp b/c_compiler/src/expression.cpp
index 59440ec..9f99dc2 100644
--- a/c_compiler/src/expression.cpp
+++ b/c_compiler/src/expression.cpp
@@ -460,8 +460,20 @@ Bindings AdditiveExpression::printAsm(Bindings bindings, int &label_count) const
 {
     evaluateExpression(bindings, label_count);
     
-    // TODO currently using signed and sub because I only have signed numbers implemented
-    // must update this as I add more types
+    // when its a pointer added to a non pointer, multiply non pointer by pointer type
+    if(std::dynamic_pointer_cast<Pointer>(lhs_->getType(bindings)) != nullptr &&
+       std::dynamic_pointer_cast<Pointer>(rhs_->getType(bindings)) == nullptr &&
+       std::dynamic_pointer_cast<Identifier>(lhs_) != nullptr)
+    {
+	printf("\tsll\t$3,$3,%d\n", lhs_->getType(bindings)->getSize()/2);
+    }
+    else if(std::dynamic_pointer_cast<Pointer>(lhs_->getType(bindings)) == nullptr &&
+	    std::dynamic_pointer_cast<Pointer>(rhs_->getType(bindings)) != nullptr &&
+	    std::dynamic_pointer_cast<Identifier>(rhs_) != nullptr)
+    {
+	printf("\tsll\t$2,$2,%d\n", rhs_->getType(bindings)->getSize()/2);
+    }
+    
     if(operator_ == "+")
 	printf("\taddu\t$2,$2,$3\n");
     else if(operator_ == "-")
@@ -1023,7 +1035,7 @@ void Initializer::printInitializerAsm(Bindings &bindings, int &label_count, int
 	    {
 		Bindings temp_bindings = bindings;
 		expression_vector[i]->printAsm(temp_bindings, label_count);
-		printf("\tsw\t$2,%d($fp)\n", bindings.currentStackPosition());
+		type->store(bindings.currentStackPosition());
 	    }
 	    type->increaseStackPosition(bindings);
 	}
diff --git a/test_deliverable/testcases/test_MULTARR1.c b/test_deliverable/testcases/test_MULTARR1.c
new file mode 100644
index 0000000..e3d11ee
--- /dev/null
+++ b/test_deliverable/testcases/test_MULTARR1.c
@@ -0,0 +1,9 @@
+char multiarr1(char a, char b, char c, char d, char e)
+{
+    char x[2][3] = {
+	{a, b,},
+	{c, d, e},
+    };
+
+    return x[1][2];
+}
diff --git a/test_deliverable/testcases/test_MULTARR1_driver.c b/test_deliverable/testcases/test_MULTARR1_driver.c
new file mode 100644
index 0000000..8e1a67e
--- /dev/null
+++ b/test_deliverable/testcases/test_MULTARR1_driver.c
@@ -0,0 +1,6 @@
+char multiarr1(char, char, char, char, char);
+
+int main()
+{
+    return !( 'e' == multiarr1('a', 'b', 'c', 'd', 'e') );
+}
diff --git a/test_deliverable/testcases/test_POINTERAD0.c b/test_deliverable/testcases/test_POINTERAD0.c
new file mode 100644
index 0000000..c4050f5
--- /dev/null
+++ b/test_deliverable/testcases/test_POINTERAD0.c
@@ -0,0 +1,7 @@
+int pointeradd(int *a);
+
+int main()
+{
+    int x[5] = {1, 2, 3, 4, 5};
+    return !( 4 == pointeradd(&x[1]) );
+}
diff --git a/test_deliverable/testcases/test_POINTERAD0_driver.c b/test_deliverable/testcases/test_POINTERAD0_driver.c
new file mode 100644
index 0000000..af7bcee
--- /dev/null
+++ b/test_deliverable/testcases/test_POINTERAD0_driver.c
@@ -0,0 +1,4 @@
+int pointeradd(int *a)
+{
+    return *(a+2);
+}
diff --git a/test_deliverable/testcases/test_POINTERADD.c b/test_deliverable/testcases/test_POINTERADD.c
new file mode 100644
index 0000000..af7bcee
--- /dev/null
+++ b/test_deliverable/testcases/test_POINTERADD.c
@@ -0,0 +1,4 @@
+int pointeradd(int *a)
+{
+    return *(a+2);
+}
diff --git a/test_deliverable/testcases/test_POINTERADD_driver.c b/test_deliverable/testcases/test_POINTERADD_driver.c
new file mode 100644
index 0000000..44ea6d7
--- /dev/null
+++ b/test_deliverable/testcases/test_POINTERADD_driver.c
@@ -0,0 +1,7 @@
+int pointeradd(int *a);
+
+int main()
+{
+    int x[5] = {1, 2, 3, 4, 5};
+    return !( 3 == pointeradd(x) );
+}
-- 
cgit