Division

emulator/hart_test.c

@@ -263,6 +263,36 @@ static void test_m()
 
     execute(&hart, 0x022091b3); // mulh x3, x1, x2
     assert(hart.regs[3] == 0x00000000);
+
+    hart.regs[1] = (uint32_t)-63;
+    hart.regs[2] = 4;
+    
+    execute(&hart, 0x0220c1b3); // div x3, x1, x2
+    assert(hart.regs[3] == (uint32_t)-15);
+    
+    execute(&hart, 0x0220d1b3); // divu x3, x1, x2
+    assert(hart.regs[3] == 0x3FFFFFF0);
+    
+    execute(&hart, 0x0220e1b3); // rem x3, x1, x2
+    assert(hart.regs[3] == (uint32_t)-3);
+    
+    execute(&hart, 0x0220f1b3); // remu x3, x1, x2
+    assert(hart.regs[3] == 1);
+
+    hart.regs[1] = 30;
+    hart.regs[2] = 0;
+    
+    execute(&hart, 0x0220c1b3); // div x3, x1, x2
+    assert(hart.regs[3] == 0xFFFFFFFF);
+    
+    execute(&hart, 0x0220d1b3); // divu x3, x1, x2
+    assert(hart.regs[3] == 0xFFFFFFFF);
+    
+    execute(&hart, 0x0220e1b3); // rem x3, x1, x2
+    assert(hart.regs[3] == 30);
+    
+    execute(&hart, 0x0220f1b3); // remu x3, x1, x2
+    assert(hart.regs[3] == 30);
 }
 
 int main(int argc, char* argv[])