[PULL 15/21] tests/tcg/loongarch64: Add pcadd related instructions test

[Richard Henderson]

From: Song Gao <gaosong@loongson.cn>

This includes:
- PCADDI
- PCADDU12I
- PCADDU18I
- PCALAU12I

Signed-off-by: Song Gao <gaosong@loongson.cn>
Message-Id: <20220716085426.3098060-9-gaosong@loongson.cn>
Signed-off-by: Richard Henderson <richard.henderson@linaro.org>
---
 tests/tcg/loongarch64/test_pcadd.c    | 38 +++++++++++++++++++++++++++
 tests/tcg/loongarch64/Makefile.target |  1 +
 2 files changed, 39 insertions(+)
 create mode 100644 tests/tcg/loongarch64/test_pcadd.c

diff --git a/tests/tcg/loongarch64/test_pcadd.c 
b/tests/tcg/loongarch64/test_pcadd.c
new file mode 100644
index 0000000000..da2a64db82
--- /dev/null
+++ b/tests/tcg/loongarch64/test_pcadd.c
@@ -0,0 +1,38 @@
+#include <assert.h>
+#include <inttypes.h>
+#include <string.h>
+
+#define TEST_PCADDU(N)                              \
+void test_##N(int a)                                \
+{                                                   \
+    uint64_t rd1 = 0;                               \
+    uint64_t rd2 = 0;                               \
+    uint64_t rm, rn;                                \
+                                                    \
+    asm volatile(""#N" %0, 0x104\n\t"               \
+                 ""#N" %1, 0x12345\n\t"             \
+                 : "=r"(rd1), "=r"(rd2)             \
+                 : );                               \
+    rm = rd2 - rd1;                                 \
+    if (!strcmp(#N, "pcalau12i")) {                 \
+        rn = ((0x12345UL - 0x104) << a) & ~0xfff;   \
+    } else {                                        \
+        rn = ((0x12345UL - 0x104) << a) + 4;        \
+    }                                               \
+    assert(rm == rn);                               \
+}
+
+TEST_PCADDU(pcaddi)
+TEST_PCADDU(pcaddu12i)
+TEST_PCADDU(pcaddu18i)
+TEST_PCADDU(pcalau12i)
+
+int main()
+{
+    test_pcaddi(2);
+    test_pcaddu12i(12);
+    test_pcaddu18i(18);
+    test_pcalau12i(12);
+
+    return 0;
+}
diff --git a/tests/tcg/loongarch64/Makefile.target 
b/tests/tcg/loongarch64/Makefile.target
index b320d9fd9c..0115de78ef 100644
--- a/tests/tcg/loongarch64/Makefile.target
+++ b/tests/tcg/loongarch64/Makefile.target
@@ -14,5 +14,6 @@ LOONGARCH64_TESTS  = test_bit
 LOONGARCH64_TESTS  += test_div
 LOONGARCH64_TESTS  += test_fclass
 LOONGARCH64_TESTS  += test_fpcom
+LOONGARCH64_TESTS  += test_pcadd
 
 TESTS += $(LOONGARCH64_TESTS)
-- 
2.34.1