From 2065b0a094e119b7796b53d021a58fbcbefa2ed3 Mon Sep 17 00:00:00 2001
From: "Charles L. Dorian" <cldorian@gmail.com>
Date: Thu, 8 Dec 2011 22:06:33 -0500
Subject: [PATCH] math: special cases for Pow10; delete BUG

R=rsc, golang-dev
CC=golang-dev
https://golang.org/cl/5477046
---
 src/pkg/math/const.go | 2 --
 src/pkg/math/pow10.go | 4 ++++
 2 files changed, 4 insertions(+), 2 deletions(-)

diff --git a/src/pkg/math/const.go b/src/pkg/math/const.go
index a108d3e294..282561f98b 100644
--- a/src/pkg/math/const.go
+++ b/src/pkg/math/const.go
@@ -49,5 +49,3 @@ const (
 	MaxUint32 = 1<<32 - 1
 	MaxUint64 = 1<<64 - 1
 )
-
-// BUG(rsc): The manual should define the special cases for all of these functions.
diff --git a/src/pkg/math/pow10.go b/src/pkg/math/pow10.go
index 20f91bcb70..f5ad28bb4b 100644
--- a/src/pkg/math/pow10.go
+++ b/src/pkg/math/pow10.go
@@ -9,6 +9,10 @@ package math
 var pow10tab [70]float64
 
 // Pow10 returns 10**e, the base-10 exponential of e.
+//
+// Special cases are:
+//	Pow10(e) = +Inf for e > 309
+//	Pow10(e) = 0 for e < -324
 func Pow10(e int) float64 {
 	if e <= -325 {
 		return 0
-- 
2.50.0