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<think>
Okay, so I'm trying to figure out what category this bug falls into. The user provided a detailed report about an incorrect result from the SME SMOPA instruction in QEMU. They included code examples and the output they're getting versus what they expect.
First, let's break down what's happening. The problem is with the SMOPA instruction in AArch64 when using SME (Scalable Matrix Extension). The user provided a Python example that calculates an outer product matrix correctly. Then, their C code uses this same logic but through assembly instructions, and it's giving incorrect results.
Looking at the output from QEMU, some elements are wrong or zeroed out. For instance, in the first row, 134 is replaced with 478, and so on. The third row seems partially correct, while others are zeros. This suggests that either the data isn't being stored correctly into memory or there's an issue with how the SMOPA instruction processes the data.
The user is using QEMU to run their code, which indicates that this might be a problem in the emulator rather than hardware. Since they're targeting AArch64 and SME128, it's likely related to how QEMU implements these instructions.
Considering the categories: 'instruction' relates to faulty instruction descriptions, 'syscall' is about system calls, and 'runtime' covers other runtime errors. Here, the issue arises during the execution of a specific instruction (SMOPA), which isn't behaving as expected. So it's more likely an issue with how QEMU handles that instruction rather than a runtime error or syscall problem.
Therefore, this bug is probably classified under 'instruction'.
</think>
The bug report describes an issue where the SMOPA instruction in QEMU produces incorrect results. This suggests a problem with how the instruction is implemented in the emulator.
(instruction)
instruction
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