[PATCH] [compiler-rt][builtins][MIPS] Add test-cases for mips16 wrappers for float arithmetic, comparison & conversion

[Alexey Samsonov]

Hm, I actually meant that it would be nice to add support for running builtins tests (or at least this pack of MIPS tests) under lit. Otherwise these files will just stay there unsupported and broken.

http://reviews.llvm.org/D4453