tests/tcg/mips: Add tests for R5900 MTLO1 and MTHI1

Add a test for MTLO1 and MTHI1.
Reviewed-by: NAleksandar Markovic <amarkovic@wavecomp.com>
Signed-off-by: NFredrik Noring <noring@nocrew.org>
Signed-off-by: NAleksandar Markovic <amarkovic@wavecomp.com>

tests/tcg/mips/mipsr5900/Makefile

@@ -9,6 +9,7 @@ CC      = $(CROSS)gcc
 CFLAGS  = -Wall -mabi=32 -march=r5900 -static
 
 TESTCASES = mflohi1.tst
+TESTCASES += mtlohi1.tst
 TESTCASES += mult.tst
 TESTCASES += multu.tst
 

tests/tcg/mips/mipsr5900/mtlohi1.c

+/*
+ * Test R5900-specific MTLO1 and MTHI1.
+ */
+
+#include <stdio.h>
+#include <inttypes.h>
+#include <assert.h>
+
+int main()
+{
+    int32_t tlo  = 12207031, thi  = 305175781;
+    int32_t tlo1 = 32452867, thi1 = 49979687;
+    int32_t flo, fhi, flo1, fhi1;
+
+    /* Test both LO/HI and LO1/HI1 to verify separation. */
+    __asm__ __volatile__ (
+            "    mtlo  %4\n"
+            "    mthi  %5\n"
+            "    mtlo1 %6\n"
+            "    mthi1 %7\n"
+            "    move  %0, $0\n"
+            "    move  %1, $0\n"
+            "    move  %2, $0\n"
+            "    move  %3, $0\n"
+            "    mflo  %0\n"
+            "    mfhi  %1\n"
+            "    mflo1 %2\n"
+            "    mfhi1 %3\n"
+            : "=r" (flo),  "=r" (fhi),
+              "=r" (flo1), "=r" (fhi1)
+            : "r" (tlo),  "r" (thi),
+              "r" (tlo1), "r" (thi1));
+
+    assert(flo  == 12207031);
+    assert(fhi  == 305175781);
+    assert(flo1 == 32452867);
+    assert(fhi1 == 49979687);
+
+    return 0;
+}