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Diffstat (limited to 'results/classifier/deepseek-r1:32b/reasoning/instruction/1267955')
| -rw-r--r-- | results/classifier/deepseek-r1:32b/reasoning/instruction/1267955 | 15 |
1 files changed, 15 insertions, 0 deletions
diff --git a/results/classifier/deepseek-r1:32b/reasoning/instruction/1267955 b/results/classifier/deepseek-r1:32b/reasoning/instruction/1267955 new file mode 100644 index 00000000..915d9bb1 --- /dev/null +++ b/results/classifier/deepseek-r1:32b/reasoning/instruction/1267955 @@ -0,0 +1,15 @@ +<think> +Okay, so I'm trying to classify this bug report about QEMU not setting the parity flag correctly after an XOR instruction. Let me break it down step by step. + +First, the problem occurs when using the `xor %eax,%eax` instruction (opcode 31 c0). After executing this instruction, the parity flag isn't set as expected. However, if we replace this with `sub %eax,%eax` (29 c0), the parity flag works correctly. + +I know that both XOR and SUB instructions can be used to zero out a register. But the difference lies in how they affect the flags. The XOR instruction should clear all bits, including the parity flag because it's setting EAX to zero. On the other hand, the SUB instruction also zeros EAX but might handle the flags differently. + +The user tested this with both QEMU 1.7.0 and 1.7.50 on Debian Sid, so it's consistent across these versions. The output when using XOR results in a different value than expected (46 vs B2), which suggests that the parity flag isn't being set correctly by QEMU after XOR. + +Since this issue is about how an instruction affects the CPU flags, specifically the parity flag, it falls under how QEMU emulates instructions. Therefore, it's related to an incorrect handling of the instruction's effect on the processor state. + +Looking at the categories provided: instruction, syscall, runtime. The problem isn't with a system call (syscall) nor is it a general runtime error. It's specifically about how the XOR instruction modifies the CPU flags, which means it's an instruction-level issue. +</think> + +instruction \ No newline at end of file |