R600: optimize the UDIVREM 64 algorithm
This is a squash of several optimization commits:
- calculate DIV_Lo and DIV_Hi separately
- use BFE_U32 if we are operating on 32bit values
- use precomputed constants instead of shifting in UDVIREM
- skip the first 32 iterations of udivrem
v2: Check whether BFE is supported before using it
Patch by: Jan Vesely
Signed-off-by: Jan Vesely <[email protected]>
Reviewed-by: Tom Stellard <[email protected]>
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@207589 91177308-0d34-0410-b5e6-96231b3b80d8
2 files changed
