1 files changed, 50 insertions, 0 deletions
diff --git a/sim/testsuite/bfin/usp.S b/sim/testsuite/bfin/usp.S
new file mode 100644
index 0000000..e77ff52
--- /dev/null
+++ b/sim/testsuite/bfin/usp.S
@@ -0,0 +1,50 @@
+# Blackfin testcase for USP handling
+# mach: bfin
+# sim: --environment operating
+
+#include "test.h"
+	.include "testutils.inc"
+
+	start
+
+	imm32 R5, 0x44455566
+	imm32 R6, 0x12345678
+	imm32 R7, 0x9abcdef0
+
+	imm32 p0, EVT3;
+	loadsym r0, exception;
+	[p0] = r0;
+
+	loadsym r0, usermode;
+	reti = r0;
+
+	SP = R6;
+	USP = R7;
+	RTI;
+
+usermode:
+	# SP should now be USP
+	R1 = SP;
+	CC = R1 == R7;
+	IF !CC JUMP fail;
+
+	# Now set SP to another value
+	SP = R5;
+
+	# Move up to exception space
+	EXCPT 0;
+
+exception:
+	# SP should be the same as original, but USP should change
+	R1 = SP;
+	CC = R1 == R6;
+	IF !CC JUMP fail;
+
+	R1 = USP;
+	CC = R1 == R5;
+	IF !CC JUMP fail;
+
+	dbg_pass
+
+fail:
+	dbg_fail