[LLVMbugs] [Bug 19383] New: Denormalized results for divsf3 and divdf3

bugzilla-daemon at llvm.org bugzilla-daemon at llvm.org
Wed Apr 9 08:38:38 PDT 2014


            Bug ID: 19383
           Summary: Denormalized results for divsf3 and divdf3
           Product: compiler-rt
           Version: unspecified
          Hardware: All
                OS: All
            Status: NEW
          Severity: enhancement
          Priority: P
         Component: compiler-rt
          Assignee: unassignedbugs at nondot.org
          Reporter: hausen at gmx.at
                CC: llvmbugs at cs.uiuc.edu
    Classification: Unclassified

Created attachment 12358
  --> http://llvm.org/bugs/attachment.cgi?id=12358&action=edit
Proposed patch for denormalized division results.

divsf and divdf currently flush denormalized results to zero. The attached
patch changes this. It works for the few test cases I have at hand (notably,
the paranoia floating-point test). The code is adapted from the corresponding
code in the multiplication routines, so it should not be too far off, but,
admittedly, I might have overlooked some corner case.

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