https://bugs.kde.org/show_bug.cgi?id=489338
Bug ID: 489338
Summary: arm64: Instruction fcvtas should round 322.5 to 323,
but result is 322.
Classification: Developer tools
Product: valgrind
Version: 3.20.0
Platform: Debian unstable
OS: Linux
Status: REPORTED
Severity: normal
Priority: NOR
Component: vex
Assignee: jsew...@acm.org
Reporter: bernha...@mailbox.org
Target Milestone: ---
Created attachment 171101
--> https://bugs.kde.org/attachment.cgi?id=171101&action=edit
Minimal reproducer: fp-valgrind-test.c
Hello, I was investigating a debian bug, where the continuous integration
failed
because it receives a different value when running with valgrind. [1071656]
I could track it down to a fcvtas instruction.
=> 0xaaaaaaaa4948 <ConvertToRational+104>: fcvtas w5, d8
(With $d8=322.5)
With plain GDB:
(gdb) print $w5
$2 = 323
With valgrind+GDB:
(gdb) print $w5
$2 = 322
Attached is a minimal reproducer.
[1071656] https://bugs.debian.org/cgi-bin/bugreport.cgi?bug=1071656
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