VxWorks RTOS with 3rd party math lib. Thanks, Peixing
-----Original Message----- From: Python-Dev [mailto:python-dev-bounces+peixing.xin=windriver....@python.org] On Behalf Of Greg Ewing Sent: Friday, April 12, 2019 1:45 PM To: python-dev@python.org Subject: Re: [Python-Dev] checking "errno" for math operaton is safe to determine the error status? Xin, Peixing wrote: > On certain platform, expm1() is implemented as exp() minus 1. To calculate > expm1(-1420.0), that will call exp(-1420.0) then substract 1. You know, > exp(-1420.0) will underflow to zero and errno is set to ERANGE. As a > consequence the errno keeps set there when expm1() returns the correct result > -1. This sounds like a bug in that platform's implementation of expm1() to me. Which platform is it? -- Greg _______________________________________________ Python-Dev mailing list Python-Dev@python.org https://mail.python.org/mailman/listinfo/python-dev Unsubscribe: https://mail.python.org/mailman/options/python-dev/peixing.xin%40windriver.com _______________________________________________ Python-Dev mailing list Python-Dev@python.org https://mail.python.org/mailman/listinfo/python-dev Unsubscribe: https://mail.python.org/mailman/options/python-dev/archive%40mail-archive.com
