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semantic: 0.987
instruction: 0.962
mistranslation: 0.603
other: 0.269
x86 BLSMSK semantic bug
Description of problem
The result of instruction BLSMSK is different with from the CPU. The value of CF is different.
Steps to reproduce
Compile this code
void main() {
asm("mov rax, 0x65b2e276ad27c67");
asm("mov rbx, 0x62f34955226b2b5d");
asm("blsmsk eax, ebx");
}
Execute and compare the result with the CPU.
CPU
CF = 0
QEMU
CF = 1
Additional information
This bug is discovered by research conducted by KAIST SoftSec.
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