Initial Commit

assembler/inc/check.h

@@ -0,0 +1,33 @@
+/*
+ * This file declares functions for
+ *  - checking instruction parameters for their validity
+ */
+
+#ifndef CHECK_H_
+#define CHECK_H_
+
+/*
+ * returns a valid register number or throws error if r out of range
+ * r: number of register to be checked
+ */
+int reg(int r);
+
+/*
+ * returns a valid 8bit signed value or throws error if imm out of range
+ * imm: immediate to be checked
+ */
+int signed8(int imm);
+
+/*
+ * returns a valid 4bit unsigned value or throws error if imm out of range
+ * imm: immediate to be checked
+ */
+int unsigned4(int imm);
+
+/*
+ * returns a valid 32bit signed value or throws error if imm out of range
+ * imm: immediate to be checked
+ */
+int word(int imm);
+
+#endif /* CHECK_H_ */