From 335a5236e72b1d059fabfbfdd2ac13107aec4072 Mon Sep 17 00:00:00 2001
From: Rob Pike <r@golang.org>
Date: Thu, 6 Nov 2008 15:48:36 -0800
Subject: [PATCH] add sys.float32bits, sys.float64bits

R=rsc
DELTA=21  (21 added, 0 deleted, 0 changed)
OCL=18709
CL=18718
---
 src/cmd/gc/sys.go      |  2 ++
 src/cmd/gc/sysimport.c |  2 ++
 src/runtime/runtime.c  | 17 +++++++++++++++++
 3 files changed, 21 insertions(+)

diff --git a/src/cmd/gc/sys.go b/src/cmd/gc/sys.go
index 0ee9deb51b..72e36a0c75 100644
--- a/src/cmd/gc/sys.go
+++ b/src/cmd/gc/sys.go
@@ -49,6 +49,8 @@ export func	isInf(float64, int) bool;		// test for infinity
 export func	isNaN(float64) bool;			// test for not-a-number
 export func	Inf(int) float64;			// return signed Inf
 export func	NaN() float64;				// return a NaN
+export func	float32bits(float32) uint32;		// raw bits
+export func	float64bits(float64) uint64;		// raw bits
 
 export func	newmap(keysize int, valsize int,
 			keyalg int, valalg int,
diff --git a/src/cmd/gc/sysimport.c b/src/cmd/gc/sysimport.c
index 02b5a86e81..9ee99a1892 100644
--- a/src/cmd/gc/sysimport.c
+++ b/src/cmd/gc/sysimport.c
@@ -39,6 +39,8 @@ char *sysimport =
 	"export func sys.isNaN (? float64) (? bool)\n"
 	"export func sys.Inf (? int) (? float64)\n"
 	"export func sys.NaN () (? float64)\n"
+	"export func sys.float32bits (? float32) (? uint32)\n"
+	"export func sys.float64bits (? float64) (? uint64)\n"
 	"export func sys.newmap (keysize int, valsize int, keyalg int, valalg int, hint int) (hmap *map[any] any)\n"
 	"export func sys.mapaccess1 (hmap *map[any] any, key any) (val any)\n"
 	"export func sys.mapaccess2 (hmap *map[any] any, key any) (val any, pres bool)\n"
diff --git a/src/runtime/runtime.c b/src/runtime/runtime.c
index db31b77df3..a0d97dcda9 100644
--- a/src/runtime/runtime.c
+++ b/src/runtime/runtime.c
@@ -347,6 +347,23 @@ sys·NaN(float64 out)
 	FLUSH(&out);
 }
 
+// func float32bits(float32) uint32; // raw bits of float32
+void
+sys·float32bits(float32 din, uint32 iou)
+{
+	iou = *(uint32*)&din;
+	FLUSH(&iou);
+}
+
+// func float64bits(float64) uint64; // raw bits of float64
+void
+sys·float64bits(float64 din, uint64 iou)
+{
+	iou = *(uint64*)&din;
+	FLUSH(&iou);
+}
+
+
 static int32	argc;
 static uint8**	argv;
 static int32	envc;
-- 
2.50.0