Adding upstream version 1.21.8.upstream/1.21.8

Signed-off-by: Daniel Baumann <daniel.baumann@progress-linux.org>

1 files changed, 30 insertions, 0 deletions

diff --git a/src/runtime/tagptr_32bit.go b/src/runtime/tagptr_32bit.go
new file mode 100644
index 0000000..f79e182
--- /dev/null
+++ b/src/runtime/tagptr_32bit.go
@@ -0,0 +1,30 @@
+// Copyright 2014 The Go Authors. All rights reserved.
+// Use of this source code is governed by a BSD-style
+// license that can be found in the LICENSE file.
+
+//go:build 386 || arm || mips || mipsle
+
+package runtime
+
+import "unsafe"
+
+// The number of bits stored in the numeric tag of a taggedPointer
+const taggedPointerBits = 32
+
+// On 32-bit systems, taggedPointer has a 32-bit pointer and 32-bit count.
+
+// taggedPointerPack created a taggedPointer from a pointer and a tag.
+// Tag bits that don't fit in the result are discarded.
+func taggedPointerPack(ptr unsafe.Pointer, tag uintptr) taggedPointer {
+	return taggedPointer(uintptr(ptr))<<32 | taggedPointer(tag)
+}
+
+// Pointer returns the pointer from a taggedPointer.
+func (tp taggedPointer) pointer() unsafe.Pointer {
+	return unsafe.Pointer(uintptr(tp >> 32))
+}
+
+// Tag returns the tag from a taggedPointer.
+func (tp taggedPointer) tag() uintptr {
+	return uintptr(tp)
+}