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| author | Christian Krinitsin <mail@krinitsin.com> | 2025-06-03 12:04:13 +0000 |
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| committer | Christian Krinitsin <mail@krinitsin.com> | 2025-06-03 12:04:13 +0000 |
| commit | 256709d2eb3fd80d768a99964be5caa61effa2a0 (patch) | |
| tree | 05b2352fba70923126836a64b6a0de43902e976a /results/classifier/001/semantic/gitlab_semantic_addsubps | |
| parent | 2ab14fa96a6c5484b5e4ba8337551bb8dcc79cc5 (diff) | |
| download | qemu-analysis-256709d2eb3fd80d768a99964be5caa61effa2a0.tar.gz qemu-analysis-256709d2eb3fd80d768a99964be5caa61effa2a0.zip | |
add new classifier result
Diffstat (limited to 'results/classifier/001/semantic/gitlab_semantic_addsubps')
| -rw-r--r-- | results/classifier/001/semantic/gitlab_semantic_addsubps | 28 |
1 files changed, 28 insertions, 0 deletions
diff --git a/results/classifier/001/semantic/gitlab_semantic_addsubps b/results/classifier/001/semantic/gitlab_semantic_addsubps new file mode 100644 index 000000000..cbd5eeb7c --- /dev/null +++ b/results/classifier/001/semantic/gitlab_semantic_addsubps @@ -0,0 +1,28 @@ +semantic: 0.974 +instruction: 0.931 +other: 0.732 +mistranslation: 0.299 + +x86 SSE/SSE2/SSE3 instruction semantic bugs with NaN + +Description of problem +The result of SSE/SSE2/SSE3 instructions with NaN is different from the CPU. From Intel manual Volume 1 Appendix D.4.2.2, they defined the behavior of such instructions with NaN. But I think QEMU did not implement this semantic exactly because the byte result is different. + +Steps to reproduce + +Compile this code + +void main() { + asm("mov rax, 0x000000007fffffff; push rax; mov rax, 0x00000000ffffffff; push rax; movdqu XMM1, [rsp];"); + asm("mov rax, 0x2e711de7aa46af1a; push rax; mov rax, 0x7fffffff7fffffff; push rax; movdqu XMM2, [rsp];"); + asm("addsubps xmm1, xmm2"); +} + +Execute and compare the result with the CPU. This problem happens with other SSE/SSE2/SSE3 instructions specified in the manual, Volume 1 Appendix D.4.2.2. + +CPU xmm1[3] = 0xffffffff + +QEMU xmm1[3] = 0x7fffffff + +Additional information +This bug is discovered by research conducted by KAIST SoftSec. |