tree 79c7c48ce9c5b572990ba825f9e9c0c65900c537
parent 8e6a8d9e282a6f9aeab5635c75c223129f5ab61f
author Keith Randall <khr@golang.org> 1583258852 +0000
committer Keith Randall <khr@golang.org> 1585759274 +0000

reflect: when Converting between float32s, don't lose signal NaNs

Trying this CL again, with a test that skips 387.

When converting from float32->float64->float32, any signal NaNs
get converted to quiet NaNs. Avoid that so using reflect.Value.Convert
between two float32 types keeps the signal bit of NaNs.

Skip the test on 387. I don't see any sane way of ensuring that a
float load + float store is faithful on that platform.

Fixes #36400

Change-Id: Ic316c74ddc155632e40424e207375b5d50dcd853
Reviewed-on: https://go-review.googlesource.com/c/go/+/221792
Run-TryBot: Keith Randall <khr@golang.org>
TryBot-Result: Gobot Gobot <gobot@golang.org>
Reviewed-by: Josh Bleecher Snyder <josharian@gmail.com>