RTEMS | sign_extend31 may be broken (#5225)

Mon Mar 3 02:45:17 UTC 2025

Hamish Mackenzie created an issue: https://gitlab.rtems.org/rtems/rtos/rtems/-/issues/5225

While trying to understand how to implement `R_ARM_PREL31` support in GHC, we noticed that `sign_extend31` seems to be broken (at least it does not do what it used to do).

It was changed from having multiple `return`s to a single return, but now the bits set in the first `return` are always masked off.

See https://gitlab.rtems.org/rtems/rtos/rtems/-/commit/c6eead1353e03542e5bad9efda3b6553125520d8#4d66cd4d47325eddf2b76a4d3cd17b21fb0215e8_56_61

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View it on GitLab: https://gitlab.rtems.org/rtems/rtos/rtems/-/issues/5225
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