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| author | Christian Krinitsin <mail@krinitsin.com> | 2025-07-06 16:43:19 +0000 |
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| committer | Christian Krinitsin <mail@krinitsin.com> | 2025-07-06 16:43:19 +0000 |
| commit | 238ec2b7cc1557d6f34c33cc482e4d0cd3e266dd (patch) | |
| tree | cd8a1b75ba7b3543eb7fe6857f408e7be4d9fd0b /results/classifier/deepseek-r1:32b/reasoning/instruction/2376 | |
| parent | 96049c939b1916d80532630d63c14e04d5244f1d (diff) | |
| download | emulator-bug-study-238ec2b7cc1557d6f34c33cc482e4d0cd3e266dd.tar.gz emulator-bug-study-238ec2b7cc1557d6f34c33cc482e4d0cd3e266dd.zip | |
add results
Diffstat (limited to 'results/classifier/deepseek-r1:32b/reasoning/instruction/2376')
| -rw-r--r-- | results/classifier/deepseek-r1:32b/reasoning/instruction/2376 | 19 |
1 files changed, 19 insertions, 0 deletions
diff --git a/results/classifier/deepseek-r1:32b/reasoning/instruction/2376 b/results/classifier/deepseek-r1:32b/reasoning/instruction/2376 new file mode 100644 index 00000000..5a3301a6 --- /dev/null +++ b/results/classifier/deepseek-r1:32b/reasoning/instruction/2376 @@ -0,0 +1,19 @@ +<think> +Okay, so I need to classify this bug report into one of three categories: instruction, syscall, or runtime. Let me go through each part step by step. + +First, looking at the problem description. The issue is with the vcmla instructions in ARM. These are vector complex multiply and accumulate instructions. The helper functions for these instructions have a bug where they modify an irrelevant vector register. Specifically, the elements per segment calculation is incorrect because 16 divided by the size of float16 or float32 might not be correct. + +In the provided code snippets, the variables eltspersegment are set to 16 divided by the size of the data type. For float16 (half-precision), that would be 8 elements per segment because each element is 2 bytes (16/2=8). Similarly, for float32 (single-precision), it's 4 elements per segment (16/4=4). However, the current code uses 16 divided by the size, which gives the correct number of elements. Wait, maybe I'm misunderstanding. The comment says "This should be fixed," implying that perhaps the initial value is wrong. + +Looking at the steps to reproduce: when running the test program on QEMU with the bug, D31 gets modified unexpectedly. It was supposed to remain as 0xff bytes but instead changes to some other values after the vcmla instruction runs. This suggests that the helper functions are incorrectly writing data beyond their intended target. + +The problem arises because the helper function's loop iterates more times than it should, potentially accessing or modifying unintended vector elements. The calculation of eltspersegment is likely incorrect, causing out-of-bounds access. So the bug is in how the vector instructions handle element counts, leading to incorrect register writes. + +So, this seems like an issue with how the instruction is being handled by QEMU's emulator. It's not a problem with a system call (syscall) nor is it about runtime errors unrelated to specific instructions. Instead, it's directly tied to the execution of the vcmla instructions, meaning the bug is in how the instruction is implemented. + +Therefore, this should be classified under the 'instruction' category because it relates to the faulty handling of a specific ARM instruction within QEMU. +</think> + +The issue pertains to incorrect handling of the `vcmla` instruction, specifically how it modifies unintended vector registers due to an out-of-bounds error in element counting. + +**Answer:** instruction \ No newline at end of file |