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| author | Christian Krinitsin <mail@krinitsin.com> | 2025-06-30 12:34:26 +0000 |
|---|---|---|
| committer | Christian Krinitsin <mail@krinitsin.com> | 2025-06-30 12:35:44 +0000 |
| commit | 25f8033d556aa17afaea4a5196ea7a69fe248320 (patch) | |
| tree | 0f056db167683be54ea1e5e72d29d6069af55e7d /results/classifier/deepseek-2-tmp/output/hypervisor/1841491 | |
| parent | 8e6da29e4ee5fc14bc1cc816a24f21271f14090d (diff) | |
| download | qemu-analysis-25f8033d556aa17afaea4a5196ea7a69fe248320.tar.gz qemu-analysis-25f8033d556aa17afaea4a5196ea7a69fe248320.zip | |
add new temporary deepseek-r1:14b results
Diffstat (limited to 'results/classifier/deepseek-2-tmp/output/hypervisor/1841491')
| -rw-r--r-- | results/classifier/deepseek-2-tmp/output/hypervisor/1841491 | 36 |
1 files changed, 36 insertions, 0 deletions
diff --git a/results/classifier/deepseek-2-tmp/output/hypervisor/1841491 b/results/classifier/deepseek-2-tmp/output/hypervisor/1841491 new file mode 100644 index 000000000..2d7f776b0 --- /dev/null +++ b/results/classifier/deepseek-2-tmp/output/hypervisor/1841491 @@ -0,0 +1,36 @@ + +floating point emulation can fail to set FE_UNDERFLOW + +Floating point emulation can fail to set FE_UNDERFLOW in some circumstances. This shows up often in glibc's "math" tests. A similar test is attached. + +This is similar to bug #1841442, but not the same problem, and I don't think the fix will be in the same code. + +On ppc64le native: +-- +$ gcc -c -O2 fma.c +$ gcc -O2 test-fma.c fma.o -lm -o test-fma +$ ./test-fma $(./test-fma) +fma(0x1.ffffffffffffcp-1022, 0x1.0000000000001p-1, 0x0.0000000000001p-1022) +0x0 + +0xa000000 +FE_INEXACT FE_UNDERFLOW +0x1p-1022 +-- + +On qemu-system-ppc64: +-- +$ ./test-fma $(./test-fma) +fma(0x1.ffffffffffffcp-1022, 0x1.0000000000001p-1, 0x0.0000000000001p-1022) +0x0 + +0x2000000 +FE_INEXACT +0x1p-1022 +-- + +QEMU versions vary, but not too much, and are pretty close to git HEAD: +- 586f3dced9 (HEAD -> master, origin/master, origin/HEAD) Merge remote-tracking branch 'remotes/cohuck/tags/s390x-20190822' into staging +- 864ab31 Update version for v4.1.0-rc4 release + +There are worse symptoms on qemu-x86_64, but this is apparently not surprising per https://bugs.launchpad.net/qemu/+bug/1841442/comments/6. \ No newline at end of file |