target-xtensa: improve unit tests debugging

- add testcase announcement;
- add global symbols for individual tests;
- add host-debug-* makefile target.

Signed-off-by: Max Filippov <jcmvbkbc@gmail.com>

tests/tcg/xtensa/Makefile

@@ -72,5 +72,8 @@ run-test_fail.tst: test_fail.tst
 debug-%.tst: %.tst
 	$(SIM) $(SIMDEBUG) $(SIMFLAGS) ./$<
 
+host-debug-%.tst: %.tst
+	gdb --args $(SIM) $(SIMFLAGS) ./$<
+
 clean:
 	$(RM) -fr $(TESTCASES) $(CRT)

tests/tcg/xtensa/macros.inc

@@ -29,7 +29,24 @@ main:
     exit
 .endm
 
+.macro print text
+.data
+97: .ascii "\text\n"
+98:
+    .align 4
+.text
+    movi    a2, 4
+    movi    a3, 2
+    movi    a4, 97b
+    movi    a5, 98b
+    sub     a5, a5, a4
+    simcall
+.endm
+
 .macro test name
+    //print test_\name
+test_\name:
+.global test_\name
 .endm
 
 .macro test_end