math/big: add a comment for SetMantExp
Change-Id: I9ff5d1767cf70648c2251268e5e815944a7cb371
Reviewed-on: https://go-review.googlesource.com/c/go/+/233737
Run-TryBot: Emmanuel Odeke <emm.odeke@gmail.com>
TryBot-Result: Gobot Gobot <gobot@golang.org>
Reviewed-by: Robert Griesemer <gri@golang.org>
diff --git a/src/math/big/float.go b/src/math/big/float.go
index da964ee..42050e2 100644
--- a/src/math/big/float.go
+++ b/src/math/big/float.go
@@ -322,10 +322,11 @@
mant.validate()
}
z.Copy(mant)
- if z.form != finite {
- return z
+
+ if z.form == finite {
+ // 0 < |mant| < +Inf
+ z.setExpAndRound(int64(z.exp)+int64(exp), 0)
}
- z.setExpAndRound(int64(z.exp)+int64(exp), 0)
return z
}
