2 Commits

Author	SHA1	Message	Date
Craig Topper	9e884169a2	[FPEnv][X86][SystemZ] Use different algorithms for i64->double uint_to_fp under strictfp to avoid producing -0.0 when rounding toward negative infinity ... Some of our conversion algorithms produce -0.0 when converting unsigned i64 to double when the rounding mode is round toward negative. This switches them to other algorithms that don't have this problem. Since it is undefined behavior to change rounding mode with the non-strict nodes, this patch only changes the behavior for strict nodes. There are still problems with unsigned i32 conversions too which I'll try to fix in another patch. Fixes part of PR47393 Reviewed By: efriedma Differential Revision: https://reviews.llvm.org/D87115	2020-10-21 18:12:54 -07:00
Ulrich Weigand	d1c0f14be8	[SystemZ][FPEnv] Back-end support for STRICT_[SU]INT_TO_FP ... As of b1d8576 there is middle-end support for STRICT_[SU]INT_TO_FP, so this patch adds SystemZ back-end support as well. The patch is SystemZ target specific except for adding SD patterns strict_[su]int_to_fp and any_[su]int_to_fp to TargetSelectionDAG.td as usual.	2019-12-17 18:24:05 +01:00