Try splitting part of 'Int' into 'MinInt' so we don't need to implement everything on u256/i256

Add addsub test

Add mul/div/rem tests

Add cmp test

Remove 32-bit div implementation

formatting updates

disable div tests for now

Bigint updates

Big update

Fix widen mul

wrapping add

disable duplicate symbols in builtins

Apply temporary unord fix from @beetrees rust-lang#593

tests

add lowerhex display

errors by ref

tests

fix-test

Update big tests

Fix core calls

Disable widen_mul for signed

Test adding symbols in build.rs

Add a feature to compile intrinsics that are missing on the system for testing

update

Disable f128 tests on platforms without system support

add missing build.rs file

pull cas file from master

testgs

print more div values

Add a benchmark

Work on fixing bit widths

Update benchmark