From ff5f50c52c421d75940ef9392211e3ab24d71332 Mon Sep 17 00:00:00 2001
From: Ian Lance Taylor <iant@google.com>
Date: Fri, 21 Jan 2011 18:19:03 +0000
Subject: Remove the types float and complex.

Update to current version of Go library.

Update testsuite for removed types.

	* go-lang.c (go_langhook_init): Omit float_type_size when calling
	go_create_gogo.
	* go-c.h: Update declaration of go_create_gogo.

From-SVN: r169098
---
 libgo/go/math/bits.go | 12 +++++++++++-
 1 file changed, 11 insertions(+), 1 deletion(-)

(limited to 'libgo/go/math/bits.go')

diff --git a/libgo/go/math/bits.go b/libgo/go/math/bits.go
index d36cd18..a1dca3e 100644
--- a/libgo/go/math/bits.go
+++ b/libgo/go/math/bits.go
@@ -10,7 +10,7 @@ const (
 	uvneginf = 0xFFF0000000000000
 	mask     = 0x7FF
 	shift    = 64 - 11 - 1
-	bias     = 1022
+	bias     = 1023
 )
 
 // Inf returns positive infinity if sign >= 0, negative infinity if sign < 0.
@@ -47,3 +47,13 @@ func IsInf(f float64, sign int) bool {
 	//	return sign >= 0 && x == uvinf || sign <= 0 && x == uvneginf;
 	return sign >= 0 && f > MaxFloat64 || sign <= 0 && f < -MaxFloat64
 }
+
+// normalize returns a normal number y and exponent exp
+// satisfying x == y × 2**exp. It assumes x is finite and non-zero.
+func normalize(x float64) (y float64, exp int) {
+	const SmallestNormal = 2.2250738585072014e-308 // 2**-1022
+	if Fabs(x) < SmallestNormal {
+		return x * (1 << 52), -52
+	}
+	return x, 0
+}
-- 
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