[AMDGPU] Assembler: More tests for SDWA instructions. Fix for SDWA float modifiers.

Summary: Depends on D20625

Reviewers: tstellarAMD, vpykhtin, artem.tamazov

Subscribers: arsenm, kzhuravl

Differential Revision: http://reviews.llvm.org/D20674

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@271662 91177308-0d34-0410-b5e6-96231b3b80d8
3 files changed