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Diffstat (limited to 'results/classifier/deepseek-2-tmp/reasoning/mistranslation/1843205')
| -rw-r--r-- | results/classifier/deepseek-2-tmp/reasoning/mistranslation/1843205 | 29 |
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diff --git a/results/classifier/deepseek-2-tmp/reasoning/mistranslation/1843205 b/results/classifier/deepseek-2-tmp/reasoning/mistranslation/1843205 deleted file mode 100644 index e7dc070f7..000000000 --- a/results/classifier/deepseek-2-tmp/reasoning/mistranslation/1843205 +++ /dev/null @@ -1,29 +0,0 @@ -<think> -Alright, let's try to figure out how to classify this bug report for QEMU. The user provided a detailed report involving a problem with the `fmod` function when running a 32-bit binary under QEMU's i386 emulator. - -First, I'll read through the bug description carefully. The issue is that when compiling a C program using GCC (version 8.3.1) on x86-64 with flags `-O3 -m32 -lm -static`, and then running it under QEMU's `qemu-i386`, the output of `fmod(x, y)` is incorrect. Specifically, the program returns `-4.000000` instead of the expected `15.000000`. However, when run natively on x86_64 or using `qemu-x86_64`, it works correctly. - -The user also provided the emitted assembly code, which shows that the binary pushes the high and low 32-bit parts of the double values for `x` and `y` onto the stack before calling `fmod`. The assembly seems correct as no unusual steps are noted during compilation. - -Testing was done across multiple QEMU versions (3.0.1 from Fedora, 4.1.0 built from source, and a specific commit) all showing the same incorrect behavior when running the 32-bit binary under i386 QEMU. Native execution works fine, as does using x86_64 QEMU. - -The user built QEMU without KVM support by disabling it during configuration. They compiled with `make -j 5`. - -Now, looking at the possible categories: mistranslation (semantic mapping issues), assembly lowering, device, graphic, socket, network, KVM, boot, vnc, debug, files, permissions, performance, kernel, peripherals, hypervisor. - -The problem seems related to how QEMU handles certain operations when emulating i386 on x86_64. The function `fmod` is a mathematical operation that likely involves floating-point calculations. If the result under QEMU is incorrect, it could be due to issues in how the emulator translates or executes the instructions for 32-bit binaries. - -Possible causes might include problems in the translation of floating-point operations (like FPU handling) in user-mode emulation. Since `fmod` relies on precise computation with double values, any mishandling during instruction translation or execution could lead to incorrect results. - -Given that the problem occurs specifically when using i386 QEMU and not x86_64, it points towards an issue within the 32-bit architecture emulation. This suggests it's related to how QEMU translates 32-bit instructions into host (x86_64) instructions, particularly those involving floating-point arithmetic. - -Looking at the categories, "mistranslation" refers to incorrect semantic mapping from source to target, which seems relevant here because the bug occurs during translation. Alternatively, it might be related to assembly lowering, but I think mistranslation is a better fit since the issue is about how the instruction is handled after translation. - -Other possible categories like "device", "graphic", or "network" don't seem applicable here as this is purely a computational issue. Since KVM was disabled during build, it's not a hypervisor-related problem either. - -Therefore, considering all factors, the most appropriate category for this bug would be "mistranslation". -</think> - -The bug occurs due to incorrect handling of 32-bit floating-point operations in QEMU's i386 emulator, likely during instruction translation. This fits under mistranslation as it involves incorrect semantic mapping from source to target architecture. - -**Answer:** `mistranslation` \ No newline at end of file |