ALUCC(ADD.I, "addi")
out:(int)reg = SUB.I(left:(int)reg, right:(int)reg)
- emit "subf %out, %left, %right"
+ emit "subf %out, %right, %left"
cost 4;
out:(int)reg = SUB.I(left:(int)reg, right:CONST.I)
--- /dev/null
+#include "test.h"
+
+/* Constants in globals to defeat constant folding. */
+int two = 2;
+int one = 1;
+int zero = 0;
+int minusone = -1;
+
+/* Bypasses the CRT, so there's no stdio or BSS initialisation. */
+void _m_a_i_n(void)
+{
+ ASSERT((two - one) == 1);
+ ASSERT((one - two) == -1);
+
+ ASSERT((two - 1) == 1);
+ ASSERT((one - 2) == -1);
+
+ ASSERT((2 - one) == 1);
+ ASSERT((1 - two) == -1);
+
+ ASSERT(((unsigned int)two - (unsigned int)one) == 1);
+ ASSERT(((unsigned int)one - (unsigned int)two) == 0xffffffff);
+
+ ASSERT(((unsigned int)two - (unsigned int)1) == 1);
+ ASSERT(((unsigned int)one - (unsigned int)2) == 0xffffffff);
+
+ ASSERT(((unsigned int)2 - (unsigned int)one) == 1);
+ ASSERT(((unsigned int)1 - (unsigned int)two) == 0xffffffff);
+
+ finished();
+}
\ No newline at end of file