diff --git a/android/prebuilt.go b/android/prebuilt.go
new file mode 100644
index 0000000..fb9e515
--- /dev/null
+++ b/android/prebuilt.go
@@ -0,0 +1,121 @@
+// Copyright 2016 Google Inc. All rights reserved.
+//
+// Licensed under the Apache License, Version 2.0 (the "License");
+// you may not use this file except in compliance with the License.
+// You may obtain a copy of the License at
+//
+//     http://www.apache.org/licenses/LICENSE-2.0
+//
+// Unless required by applicable law or agreed to in writing, software
+// distributed under the License is distributed on an "AS IS" BASIS,
+// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+// See the License for the specific language governing permissions and
+// limitations under the License.
+
+package android
+
+import "github.com/google/blueprint"
+
+// This file implements common functionality for handling modules that may exist as prebuilts,
+// source, or both.
+
+var prebuiltDependencyTag blueprint.BaseDependencyTag
+
+func SourceModuleHasPrebuilt(ctx ModuleContext) OptionalPath {
+	var path Path
+	ctx.VisitDirectDeps(func(m blueprint.Module) {
+		if ctx.OtherModuleDependencyTag(m) == prebuiltDependencyTag {
+			p := m.(PrebuiltInterface).Prebuilt()
+			if p.usePrebuilt(ctx) {
+				path = p.Path(ctx)
+			}
+		}
+	})
+
+	return OptionalPathForPath(path)
+}
+
+type Prebuilt struct {
+	Properties struct {
+		Srcs []string `android:"arch_variant"`
+		// When prefer is set to true the prebuilt will be used instead of any source module with
+		// a matching name.
+		Prefer bool `android:"arch_variant"`
+
+		SourceExists bool `blueprint:"mutated"`
+	}
+	module Module
+}
+
+func (p *Prebuilt) Name(name string) string {
+	return "prebuilt_" + name
+}
+
+func (p *Prebuilt) Path(ctx ModuleContext) Path {
+	if len(p.Properties.Srcs) == 0 {
+		ctx.PropertyErrorf("srcs", "missing prebuilt source file")
+		return nil
+	}
+
+	if len(p.Properties.Srcs) > 1 {
+		ctx.PropertyErrorf("srcs", "multiple prebuilt source files")
+		return nil
+	}
+
+	return PathForModuleSrc(ctx, p.Properties.Srcs[0])
+}
+
+type PrebuiltInterface interface {
+	Module
+	Prebuilt() *Prebuilt
+}
+
+type PrebuiltSourceInterface interface {
+	SkipInstall()
+}
+
+// prebuiltMutator ensures that there is always a module with an undecorated name, and marks
+// prebuilt modules that have both a prebuilt and a source module.
+func prebuiltMutator(ctx BottomUpMutatorContext) {
+	if m, ok := ctx.Module().(PrebuiltInterface); ok && m.Prebuilt() != nil {
+		p := m.Prebuilt()
+		name := m.base().BaseModuleName()
+		if ctx.OtherModuleExists(name) {
+			ctx.AddReverseDependency(ctx.Module(), prebuiltDependencyTag, name)
+			p.Properties.SourceExists = true
+		} else {
+			ctx.Rename(name)
+		}
+	}
+}
+
+// PrebuiltReplaceMutator replaces dependencies on the source module with dependencies on the prebuilt
+// when both modules exist and the prebuilt should be used.
+func PrebuiltReplaceMutator(ctx BottomUpMutatorContext) {
+	if m, ok := ctx.Module().(PrebuiltInterface); ok && m.Prebuilt() != nil {
+		p := m.Prebuilt()
+		name := m.base().BaseModuleName()
+		if p.Properties.SourceExists && p.usePrebuilt(ctx) {
+			ctx.ReplaceDependencies(name)
+		}
+	}
+}
+
+// PrebuiltDisableMutator disables source modules that have prebuilts that should be used instead.
+func PrebuiltDisableMutator(ctx TopDownMutatorContext) {
+	if s, ok := ctx.Module().(PrebuiltSourceInterface); ok {
+		ctx.VisitDirectDeps(func(m blueprint.Module) {
+			if ctx.OtherModuleDependencyTag(m) == prebuiltDependencyTag {
+				p := m.(PrebuiltInterface).Prebuilt()
+				if p.usePrebuilt(ctx) {
+					s.SkipInstall()
+				}
+			}
+		})
+	}
+}
+
+func (p *Prebuilt) usePrebuilt(ctx BaseContext) bool {
+	// TODO: use p.Properties.Name and ctx.ModuleDir to override prefer
+	return p.Properties.Prefer && len(p.Properties.Srcs) > 0
+}