https://bugs.kde.org/show_bug.cgi?id=440653
Bug ID: 440653
Summary: vex amd64->IR: unhandled instruction bytes: 0x66 0xF
0xC2 0xC8 0x8 0x2C 0x0 0x0 0x0 0x3
Product: valgrind
Version: unspecified
Platform: unspecified
OS: Unspecified
Status: REPORTED
Severity: normal
Priority: NOR
Component: vex
Assignee: jsew...@acm.org
Reporter: manu06ahum...@gmail.com
Target Milestone: ---
uname -a
Linux edfdf05b67cf 5.10.25-linuxkit #1 SMP Tue Mar 23 09:27:39 UTC 2021 x86_64
x86_64 x86_64 GNU/Linux
SUMMARY
vex amd64->IR: unhandled instruction bytes: 0x66 0xF 0xC2 0xC8 0x8 0x2C 0x0 0x0
0x0 0x3
STEPS TO REPRODUCE
1. Try to use the instruction CMPPD with and imm8 greater or equal than 8, for
example the following main.asm:
global _start
section .text
_start:
cmppd xmm1, xmm0, 0x8
2. nasm -f elf64 -g -F DWARF main.asm
3. ld -o main main.o
4. valgrind -v ./main
OBSERVED RESULT
vex amd64->IR: unhandled instruction bytes: 0x66 0xF 0xC2 0xC8 0x8 0x2C 0x0 0x0
0x0 0x3
vex amd64->IR: REX=0 REX.W=0 REX.R=0 REX.X=0 REX.B=0
vex amd64->IR: VEX=0 VEX.L=0 VEX.nVVVV=0x0 ESC=0F
vex amd64->IR: PFX.66=1 PFX.F2=0 PFX.F3=0
EXPECTED RESULT
No invalide instruction
SOFTWARE/OS VERSIONS
Windows:
macOS:
Linux/KDE Plasma: Ubuntu 20.04.2 LTS
(available in About System)
KDE Plasma Version:
KDE Frameworks Version:
Qt Version:
ADDITIONAL INFORMATION
valgrind version: 3.18.0.GIT
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