[Qemu-devel] [PULL 39/41] tests/tcg: mips: Test R5900 three-operand MADD1

[Aleksandar Markovic]

From: Fredrik Noring <address@hidden>

Test R5900 three-operand MADD1.

Reviewed-by: Aleksandar Markovic <address@hidden>
Signed-off-by: Aleksandar Markovic <address@hidden>
Signed-off-by: Fredrik Noring <address@hidden>
---
 tests/tcg/mips/mipsr5900/madd.c | 43 ++++++++++++++++++++++++++++++++++++-----
 1 file changed, 38 insertions(+), 5 deletions(-)

diff --git a/tests/tcg/mips/mipsr5900/madd.c b/tests/tcg/mips/mipsr5900/madd.c
index 9ad2ea6..f6f215e 100644
--- a/tests/tcg/mips/mipsr5900/madd.c
+++ b/tests/tcg/mips/mipsr5900/madd.c
@@ -1,5 +1,5 @@
 /*
- * Test R5900-specific three-operand MADD.
+ * Test R5900-specific three-operand MADD and MADD1.
  */
 
 #include <stdio.h>
@@ -29,12 +29,45 @@ int64_t madd(int64_t a, int32_t rs, int32_t rt)
     return r;
 }
 
+int64_t madd1(int64_t a, int32_t rs, int32_t rt)
+{
+    int32_t lo = a;
+    int32_t hi = a >> 32;
+    int32_t rd;
+    int64_t r;
+
+    __asm__ __volatile__ (
+            "    mtlo1 %5\n"
+            "    mthi1 %6\n"
+            "    madd1 %0, %3, %4\n"
+            "    mflo1 %1\n"
+            "    mfhi1 %2\n"
+            : "=r" (rd), "=r" (lo), "=r" (hi)
+            : "r" (rs), "r" (rt), "r" (lo), "r" (hi));
+    r = ((int64_t)hi << 32) | (uint32_t)lo;
+
+    assert(a + (int64_t)rs * rt == r);
+    assert(rd == lo);
+
+    return r;
+}
+
+static int64_t madd_variants(int64_t a, int32_t rs, int32_t rt)
+{
+    int64_t rd  = madd(a, rs, rt);
+    int64_t rd1 = madd1(a, rs, rt);
+
+    assert(rd == rd1);
+
+    return rd;
+}
+
 static void verify_madd(int64_t a, int32_t rs, int32_t rt, int64_t expected)
 {
-    assert(madd(a, rs, rt) == expected);
-    assert(madd(a, -rs, rt) == a + a - expected);
-    assert(madd(a, rs, -rt) == a + a - expected);
-    assert(madd(a, -rs, -rt) == expected);
+    assert(madd_variants(a, rs, rt) == expected);
+    assert(madd_variants(a, -rs, rt) == a + a - expected);
+    assert(madd_variants(a, rs, -rt) == a + a - expected);
+    assert(madd_variants(a, -rs, -rt) == expected);
 }
 
 int main()
-- 
2.7.4