merge tarithmetics in tarithm

Author: krux02

tests/arithm/tarithm.nim

@@ -12,7 +12,9 @@ int32
 4294967295
 2
 0
+tUnsignedOps OK
 '''
+nimout: "tUnsignedOps OK"
 """
 
 import typetraits
@@ -167,3 +169,19 @@ block tissue12177:
   echo(a - b)
   echo(a * b)
   echo(a div b)
+
+block tUnsignedOps:
+  proc testUnsignedOps() =
+    let a: int8 = -128
+    let b: int8 = 127
+
+    doAssert b +% 1 == -128
+    doAssert b -% -1 == -128
+    doAssert b *% 2 == -2
+    doAssert a /% 4 == 32
+    doAssert a %% 7 == 2
+    echo "tUnsignedOps OK"
+
+  testUnsignedOps()
+  static:
+    testUnsignedOps()