[LLVMbugs] [Bug 2801] New: x86-64 doesn't save nonvolatile XMM6-XMM15 registers
bugzilla-daemon at cs.uiuc.edu
bugzilla-daemon at cs.uiuc.edu
Wed Sep 17 03:33:14 PDT 2008
http://llvm.org/bugs/show_bug.cgi?id=2801
Summary: x86-64 doesn't save nonvolatile XMM6-XMM15 registers
Product: new-bugs
Version: unspecified
Platform: PC
OS/Version: Windows XP
Status: NEW
Severity: normal
Priority: P2
Component: new bugs
AssignedTo: unassignedbugs at nondot.org
ReportedBy: nicolas at capens.net
CC: llvmbugs at cs.uiuc.edu
The x86-64 ABI specifies that XMM6 to XMM15 are non-volatile, and should be
preserved by the callee as needed. It appears that LLVM currently doesn't do
this, causing unpredictable behavior with floating-point calculations.
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