1 files changed, 68 insertions, 0 deletions
diff --git a/tests/tcg/mips/mipsr5900/multu.c b/tests/tcg/mips/mipsr5900/multu.c
new file mode 100644
index 0000000000..f043904d69
--- /dev/null
+++ b/tests/tcg/mips/mipsr5900/multu.c
@@ -0,0 +1,68 @@
+/*
+ * Test R5900-specific three-operand MULTU and MULTU1.
+ */
+
+#include <stdio.h>
+#include <inttypes.h>
+#include <assert.h>
+
+static uint64_t multu(uint32_t rs, uint32_t rt)
+{
+    uint32_t rd, lo, hi;
+    uint64_t r;
+
+    __asm__ __volatile__ (
+            "    multu %0, %3, %4\n"
+            "    mflo %1\n"
+            "    mfhi %2\n"
+            : "=r" (rd), "=r" (lo), "=r" (hi)
+            : "r" (rs), "r" (rt));
+    r = ((uint64_t)hi << 32) | (uint32_t)lo;
+
+    assert((uint64_t)rs * rt == r);
+    assert(rd == lo);
+
+    return r;
+}
+
+static uint64_t multu1(uint32_t rs, uint32_t rt)
+{
+    uint32_t rd, lo, hi;
+    uint64_t r;
+
+    __asm__ __volatile__ (
+            "    multu1 %0, %3, %4\n"
+            "    mflo1 %1\n"
+            "    mfhi1 %2\n"
+            : "=r" (rd), "=r" (lo), "=r" (hi)
+            : "r" (rs), "r" (rt));
+    r = ((uint64_t)hi << 32) | (uint32_t)lo;
+
+    assert((uint64_t)rs * rt == r);
+    assert(rd == lo);
+
+    return r;
+}
+
+static uint64_t multu_variants(uint32_t rs, uint32_t rt)
+{
+    uint64_t rd  = multu(rs, rt);
+    uint64_t rd1 = multu1(rs, rt);
+
+    assert(rd == rd1);
+
+    return rd;
+}
+
+int main()
+{
+    assert(multu_variants(17, 19) == 323);
+    assert(multu_variants(77773, 99991) == 7776600043);
+    assert(multu_variants(12207031, 305175781) == 3725290219116211);
+
+    assert(multu_variants(0x80000000U, 0x7FFFFFFF) == 0x3FFFFFFF80000000);
+    assert(multu_variants(0x80000000U, 0x80000000U) ==  0x4000000000000000);
+    assert(multu_variants(0xFFFFFFFFU, 0xFFFFFFFFU) ==  0xFFFFFFFE00000001U);
+
+    return 0;
+}