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Page spec/property.html should mention, that mant_dig includes the (not saved) leading 1 of the mantissa. #4096

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dlangBugzillaToGithub opened this issue Oct 2, 2019 · 1 comment
Open

Page spec/property.html should mention, that mant_dig includes the (not saved) leading 1 of the mantissa. #4096

dlangBugzillaToGithub opened this issue Oct 2, 2019 · 1 comment
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P3 Severity:normal

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Berni reported this on 2019-10-02T17:33:57Z

Transferred from https://issues.dlang.org/show_bug.cgi?id=20262

Description

CustomFloat!(5, 2).mant_dig should be 5, not 6. If storeNormalized is not set, it should be 4.
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dlang (@Vild) commented on 2019-10-02T18:39:52Z

Meanwhile I found out, that mant_dig is defined differently, than I thought - the leeding 1, that is not saved in IEEE floats, is counted too. Therefore I changed title and component of this bug report. The documentation should mention, that this 1 is counted.

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