Allow optimization and use fesetround(), fegetround() #642
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howjmay
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Sep 22, 2024
| case FE_TOWARDZERO: | ||
| return _MM_ROUND_TOWARD_ZERO; | ||
| default: // FIXME | ||
| return _MM_ROUND_TOWARD_ZERO; |
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@jserv I am not sure whether we have a better value to return in the error case, so I temporarily return _MM_ROUND_TOWARD_ZERO here.
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I am not sure whether we have a better value to return in the error case, so I temporarily return
_MM_ROUND_TOWARD_ZEROhere.
It is reasonable, and you should explain more in comments.
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I have added comments for explaining the error case
howjmay
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Sep 22, 2024
| rounding = FE_TOWARDZERO; | ||
| break; | ||
| default: // FIXME | ||
| rounding = FE_TOWARDZERO; |
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I would like to ask @jmather-sesi and @alexorlov124 for reviewing. |
jserv
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Oct 6, 2024
Revert the previous restriction that some of the functions are forced to not be optimized when compiling-time optimization options were given. Now it is users' responsibility to ensure the behavior after optimization. Shifting the responsibility to the users enables sse2neon the run in the optimized state in general, but not restricted by some specific scenarios.
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Setting/getting rounding mode directly through fpcr with volatile keyword could be unstable. Therefore we use the C99 fesetround()/fegetround() here to ensure the behavior.
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Thank @howjmay for contributing! |
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thanks for reviewing |
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feat: Allow optimization option in sse2neon.h
Revert the previous restriction that some of the functions are forced
to not be optimized when compiling-time optimization options were
given.
Now it is users' responsibility to ensure the behavior after
optimization.
Shifting the responsibility to the users enables sse2neon the run in
the optimized state in general, but not restricted by some specific
scenarios.
feat: Use fesetround() and fegetround()
Setting/getting rounding mode directly through fpcr with volatile
keyword could be unstable.
Therefore we use the C99 fesetround()/fegetround() here to ensure
the behavior.
closes #648