tests/tcg/tricore: Add macros to create tests and first test 'abs'

This kind of tests is inspired by the riscv-tests repository. This adds
macros that makes it easy to create single instruction self containing
tests.

It is achieved by macros that create a test sequence for an
instruction and check for a supplied correct value. If the value is correct the
next instruction is tested. Otherwise we jump to fail handler that writes is
test number as a status code back to qemu that then exits on that status code.
If all tests pass we write back 0 as a status code and exit.

Reviewed-by: Alex Bennée <alex.bennee@linaro.org>
Signed-off-by: Bastian Koppelmann <kbastian@mail.uni-paderborn.de>
Message-Id: <20210305170045.869437-7-kbastian@mail.uni-paderborn.de>
[AJB: add container_hosts]
Signed-off-by: Alex Bennée <alex.bennee@linaro.org>
Message-Id: <20210512102051.12134-17-alex.bennee@linaro.org>

tests/tcg/configure.sh

@@ -180,6 +180,12 @@ for target in $target_list; do
       container_image=debian-sparc64-cross
       container_cross_cc=sparc64-linux-gnu-gcc
       ;;
+    tricore-softmmu)
+      container_hosts=x86_64
+      container_image=debian-tricore-cross
+      container_cross_as=tricore-as
+      container_cross_ld=tricore-ld
+      ;;
     x86_64-*)
       container_hosts="aarch64 ppc64el x86_64"
       container_image=debian-amd64-cross

tests/tcg/tricore/Makefile.softmmu-target

@@ -3,6 +3,8 @@ TESTS_PATH = $(SRC_PATH)/tests/tcg/tricore
 LDFLAGS = -T$(TESTS_PATH)/link.ld
 ASFLAGS =
 
+TESTS += test_abs.tst
+
 QEMU_OPTS += -M tricore_testboard -nographic -kernel
 
 %.pS: $(TESTS_PATH)/%.S

tests/tcg/tricore/macros.h

@@ -0,0 +1,53 @@
+/* Helpers */
+#define LI(reg, val)           \
+    mov.u reg, lo:val;         \
+    movh DREG_TEMP_LI, up:val; \
+    or reg, reg, DREG_TEMP_LI; \
+
+/* Address definitions */
+#define TESTDEV_ADDR 0xf0000000
+/* Register definitions */
+#define DREG_RS1 %d0
+#define DREG_CALC_RESULT %d1
+#define DREG_TEMP_LI %d10
+#define DREG_TEMP %d11
+#define DREG_TEST_NUM %d14
+#define DREG_CORRECT_RESULT %d15
+
+#define DREG_DEV_ADDR %a15
+
+/* Test case wrappers */
+#define TEST_CASE(num, testreg, correct, code...) \
+test_ ## num:                                     \
+    code;                                         \
+    LI(DREG_CORRECT_RESULT, correct)              \
+    mov DREG_TEST_NUM, num;                       \
+    jne testreg, DREG_CORRECT_RESULT, fail        \
+
+/* Actual test case type
+ * e.g inst %dX, %dY      -> TEST_D_D
+ *     inst %dX, %dY, %dZ -> TEST_D_DD
+ *     inst %eX, %dY, %dZ -> TEST_E_DD
+ */
+#define TEST_D_D(insn, num, result, rs1)      \
+    TEST_CASE(num, DREG_CALC_RESULT, result,  \
+    LI(DREG_RS1, rs1);                        \
+    insn DREG_CALC_RESULT, DREG_RS1;          \
+    )
+
+/* Pass/Fail handling part */
+#define TEST_PASSFAIL                       \
+        j pass;                             \
+fail:                                       \
+        LI(DREG_TEMP, TESTDEV_ADDR)         \
+        mov.a DREG_DEV_ADDR, DREG_TEMP;     \
+        st.w [DREG_DEV_ADDR], DREG_TEST_NUM;\
+        debug;                              \
+        j fail;                             \
+pass:                                       \
+        LI(DREG_TEMP, TESTDEV_ADDR)         \
+        mov.a DREG_DEV_ADDR, DREG_TEMP;     \
+        mov DREG_TEST_NUM, 0;               \
+        st.w [DREG_DEV_ADDR], DREG_TEST_NUM;\
+        debug;                              \
+        j pass;

tests/tcg/tricore/test_abs.S

@@ -0,0 +1,7 @@
+#include "macros.h"
+.text
+.global _start
+_start:
+    TEST_D_D(abs, 1, 0, 0)
+
+    TEST_PASSFAIL