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authorChristian Krinitsin <mail@krinitsin.com>2025-07-06 16:43:19 +0000
committerChristian Krinitsin <mail@krinitsin.com>2025-07-06 16:43:19 +0000
commit238ec2b7cc1557d6f34c33cc482e4d0cd3e266dd (patch)
treecd8a1b75ba7b3543eb7fe6857f408e7be4d9fd0b /results/classifier/deepseek-r1:32b/reasoning/instruction/1469342
parent96049c939b1916d80532630d63c14e04d5244f1d (diff)
downloadqemu-analysis-238ec2b7cc1557d6f34c33cc482e4d0cd3e266dd.tar.gz
qemu-analysis-238ec2b7cc1557d6f34c33cc482e4d0cd3e266dd.zip
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+<think>
+Okay, so I have to classify this bug report into one of three categories: instruction, syscall, or runtime. Let me read through it again and understand what's going on.
+
+The user is reporting an issue with QEMU-i386 when using the -cpu pentium3 option from 2015. They mention that a binary containing a 'movsd' instruction (which is part of SSE2) runs flawlessly in this setup, but according to their understanding, it should crash because Pentium 3 processors only have SSE, not SSE2.
+
+Hmm, so the problem here seems to be related to how QEMU handles instructions on different CPU types. The movsd instruction requires SSE2 support, which wasn't available on Pentium 3 chips. Therefore, when such an instruction is executed on a P3, it should cause an illegal instruction exception (SIGILL). But in this case, QEMU isn't doing that; the program runs without any issues.
+
+Looking at the categories:
+
+- **Instruction**: This would involve issues with how instructions are handled or emulated.
+- **Syscall**: Problems related to system calls.
+- **Runtime**: Other runtime errors not covered by the above.
+
+In this bug report, the issue is specifically about an instruction (movsd) that shouldn't be supported on a Pentium 3 being executed without error. This points directly to how QEMU handles instructions for different CPUs. The emulator isn't correctly identifying or handling the SSE2 instruction when running in Pentium 3 mode.
+
+So the problem lies with the instruction emulation, meaning it's an instruction-related bug.
+</think>
+
+instruction
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