Adapt coerce_is/coerce_si tests for 32bit backends

Author: pmurias

t/nqp/081-radix.t

@@ -1,4 +1,4 @@
-plan(32*3*2 + 3 + 5);
+plan(32*3*2 + 3 + 7);
 
 sub test_radix($radix,$str,$pos,$flags,$value,$mult,$offset,$desc) {
     my $result := nqp::radix($radix,$str,$pos,$flags);
@@ -81,7 +81,16 @@ test_radix_both(10,'⁰',0,0, 0,1,-1, 'unsupported by radix');
 
 # Putting the number in nqp doesn't work since it may store it as a num in between
 # so use coerce_si to test coerce_is
-my @strings := ('9223372036854775807', '0', '-1', '1', '-9223372036854775808');
+my @strings := ('92233', '0', '-1', '1', '-92233');
+
+if nqp::backendconfig(){"intvalsize"} < 8 {
+  skip("skipping coerce_is/coerce_si test with 64bit int on a 32bit backend", 2);
+}
+else {
+  nqp::unshift(@strings, '9223372036854775807');
+  nqp::push(@strings, '-9223372036854775808');
+}
+
 for @strings {
     is(nqp::coerce_is(nqp::coerce_si($_)), $_, "coerce_si and coerce_is round trip '$_'");
 }