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powl returns non-sense results in multi-thread mode #222

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zimmermann6 opened this issue Feb 4, 2021 · 1 comment
Open

powl returns non-sense results in multi-thread mode #222

zimmermann6 opened this issue Feb 4, 2021 · 1 comment

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@zimmermann6
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with the attached program I get with OpenLibm 0.7.4:

$ gcc -fno-builtin test_pow_openlibm.c /localdisk/zimmerma/openlibm-0.7.4/libopenlibm.a -fopenmp

$ OMP_NUM_THREADS=1 ./a.out
nthreads=1

$ OMP_NUM_THREADS=2 ./a.out
nthreads=2
Error for powl(0x8.779021e7c2f81b2p+14982,-0x8.0021b03e1f821c9p-15097), expected 1, got 0x8.8980e8092da8445p-3
Error for powl(0x8.779021e7c2f81b2p+14982,-0x8.0021b03e1f821c9p-15097), expected 1, got 0x8.2fae3a785f61333p-3

There seems to be an issue with powl when several threads use it.

test_pow_openlibm.c.gz
@zimmermann6
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any progress on this issue? Can someone confirm what I get?

@zimmermann6 zimmermann6 mentioned this issue Aug 3, 2021
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@zimmermann6