sdcc-3.9.0 fork implementing GNU assembler syntax

This fork aims to provide better support for stm8-binutils

1 files changed, 51 insertions, 0 deletions

diff --git a/support/regression/tests/funsigned-char.c b/support/regression/tests/funsigned-char.c
new file mode 100644
index 0000000..70223f3
--- /dev/null
+++ b/support/regression/tests/funsigned-char.c
@@ -0,0 +1,51 @@
+/*
+ * check for the correct signness of a char constant
+ *   (signed versus unsigned)
+ *   (indirect via integer promotion)
+ *
+ * Note, the check for the --funsigned-char must be invoked by hand
+ *   see the following emacs sexp
+ *     (compile "SDCCFLAGS=--funsigned-char make -C .. ALL_TESTS='./tests/funsigned-char.c'")
+ *     (compile "make -C .. ALL_TESTS='./tests/funsigned-char.c'")
+ *
+ */
+
+#include <testfwk.h>
+#include <stdint.h>
+#include <limits.h>
+
+int glb_schar_to_int = ~ (signed char)   '\200';
+int glb_uchar_to_int = ~ (unsigned char) '\200';
+int glb_char_to_int  = ~                 '\200';
+
+int tst_schar_to_int()  { return ~ (signed char)   '\200'; }
+int tst_uchar_to_int()  { return ~ (unsigned char) '\200'; }
+int tst_char_to_int()   { return ~                 '\200'; }
+
+
+void
+testBug(void)
+{
+#if CHAR_MIN >= 0
+  ASSERT(CHAR_MAX ==  255);
+  ASSERT(CHAR_MIN ==    0);
+#else
+  ASSERT(CHAR_MAX ==  127);
+  ASSERT(CHAR_MIN == -128);
+#endif
+
+  ASSERT(tst_uchar_to_int() == -129);
+  ASSERT(glb_uchar_to_int   == -129);
+
+  ASSERT(tst_schar_to_int() ==  127);
+  ASSERT(glb_schar_to_int   ==  127);
+
+#if CHAR_MIN >= 0
+  ASSERT(tst_char_to_int() == -129);
+  ASSERT(glb_char_to_int   == -129);
+#else
+  ASSERT(tst_char_to_int() ==  127);
+  ASSERT(glb_char_to_int   ==  127);
+#endif
+}
+