Issue 25984: Expose a simple "is IEEE 754" flag in sys.float_info

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This issue has been migrated to GitHub: https://github.com/python/cpython/issues/70172

classification

Title:	Expose a simple "is IEEE 754" flag in sys.float_info
Type:	enhancement	Stage:
Components:	Library (Lib)	Versions:	Python 3.6

process

Status:	open	Resolution:
Dependencies:		Superseder:
Assigned To:		Nosy List:	eric.smith, lemburg, mark.dickinson, random832, stutzbach
Priority:	normal	Keywords:

Created on 2015-12-31 20:59 by random832, last changed 2022-04-11 14:58 by admin.

Messages (1)
msg257260 - (view)	Author: (random832)	Date: 2015-12-31 20:59
I think it would be useful for programs to be able to detect whether a system uses IEEE-754 double-precision values for the 'float' type. There is lots of detailed information about the float type in sys.float_info, but no simple "is IEEE" flag. On some C implementations, this is exposed as __STDC_IEC_559__.

msg257260 - (view)

Author: (random832)

Date: 2015-12-31 20:59

I think it would be useful for programs to be able to detect whether a system uses IEEE-754 double-precision values for the 'float' type. There is lots of detailed information about the float type in sys.float_info, but no simple "is IEEE" flag. On some C implementations, this is exposed as __STDC_IEC_559__.

History
Date	User	Action	Args
2022-04-11 14:58:25	admin	set	github: 70172
2016-01-02 00:11:41	terry.reedy	set	nosy: + lemburg, mark.dickinson, eric.smith, stutzbach
2015-12-31 21:01:52	random832	set	type: enhancement components: + Library (Lib) versions: + Python 3.6
2015-12-31 20:59:50	random832	create