diff options
Diffstat (limited to 'results/classifier/deepseek-2/reasoning/mistranslation/618')
| -rw-r--r-- | results/classifier/deepseek-2/reasoning/mistranslation/618 | 21 |
1 files changed, 21 insertions, 0 deletions
diff --git a/results/classifier/deepseek-2/reasoning/mistranslation/618 b/results/classifier/deepseek-2/reasoning/mistranslation/618 new file mode 100644 index 000000000..fa75cb3a6 --- /dev/null +++ b/results/classifier/deepseek-2/reasoning/mistranslation/618 @@ -0,0 +1,21 @@ +<think> +Okay, so I'm trying to figure out how to classify this bug report. The user mentioned it's part of QEMU and provided a list of possible categories. Let me go through the details step by step. + +First, the problem is with an overflow condition code being determined incorrectly after subtraction on s390x architecture when using QEMU 6.1.0 in user-mode. The bug report includes a C program that tests this behavior. When compiled for s390x and run through QEMU, it prints 'no_overflow = 1' twice instead of the expected '0'. + +The provided code uses `__builtin_sub_overflow`, which checks if subtracting y from x causes an overflow. The test case involves subtracting a negative number with maximum value (like -2147483648 for int and -9223372036854775808L for long long) from zero. Normally, this shouldn't cause an overflow because 0 minus that negative is a positive within the range. + +Looking at the generated assembly code by GCC with optimization, it uses the 'o' condition code after subtraction to check for overflow. However, QEMU isn't setting this condition code correctly, leading to incorrect results. The user concluded the bug lies in QEMU's handling of the overflow condition code. + +Now, looking at the possible categories: mistranslation refers to issues in mapping source architecture to target, which seems relevant here since it's about how QEMU handles condition codes during translation. Assembly lowering is more about converting high-level IR to assembly, but this issue is specific to how the condition code is set after subtraction. + +Other options like device, graphic, socket, etc., don't fit because the problem is with CPU operations. 'kernel' or 'hypervisor' might be considered, but it's more about instruction translation rather than system calls or virtualization management. + +So, the bug is in how QEMU translates the condition code after subtraction, which falls under mistranslation. +</think> + +The bug report discusses an issue where QEMU incorrectly determines the overflow condition code during subtraction on s390x architecture. The problem lies in how QEMU handles the translation of the condition code generated by the target architecture's assembly instructions. This involves incorrect mapping from the source (s390x) to the IR or target, which fits under the 'mistranslation' category. + +**Answer:** + +mistranslation \ No newline at end of file |