Refactor extendsfdf2.

Patch by: GuanHong Liu
Differential Revision: http://reviews.llvm.org/D3887


git-svn-id: https://llvm.org/svn/llvm-project/compiler-rt/trunk@209781 91177308-0d34-0410-b5e6-96231b3b80d8
Implement __trunctfdf2 and __trunctfsf2 for IEEE quad precision.

Patch by: GuanHong Liu
Differential Revision: http://reviews.llvm.org/D2803


git-svn-id: https://llvm.org/svn/llvm-project/compiler-rt/trunk@209782 91177308-0d34-0410-b5e6-96231b3b80d8
Add __extenddftf2 and __extendsftf2 for IEEE quad precision.

Patch by: GuanHong Liu
Differential Revision: http://reviews.llvm.org/D2802


git-svn-id: https://llvm.org/svn/llvm-project/compiler-rt/trunk@209783 91177308-0d34-0410-b5e6-96231b3b80d8