internal/cpu: more build fixes for Go1.16beta1 release

Some files were missing from the libgo copy of internal/cpu, because they
used to only declare CacheLinePadSize which libgo gets from goarch.sh.
Now they also declare doinit, so copy them over.  Adjust cpu_other.go.

Fix the amd64p32 build by adding a build constraint to cpu_no_name.go.

Fixes PR go/98493

Reviewed-on: https://go-review.googlesource.com/c/gofrontend/+/281472

gcc/go/gofrontend/MERGE

@@ -1,4 +1,4 @@
-2b5bdd22b7ec2fc13ae0f644c781f64c1a209500
+5b075d039a20f32b9c2711ca67a3e52fba74f957
 
 The first line of this file holds the git revision number of the last
 merge done from the gofrontend repository.

libgo/go/internal/cpu/cpu_arm.go

@@ -4,6 +4,8 @@
 
 package cpu
 
+// const CacheLinePadSize = 32
+
 // arm doesn't have a 'cpuid' equivalent, so we rely on HWCAP/HWCAP2.
 // These are initialized by archauxv() and should not be changed after they are
 // initialized.

libgo/go/internal/cpu/cpu_mips.go

@@ -0,0 +1,10 @@
+// Copyright 2017 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.
+
+package cpu
+
+// const CacheLinePadSize = 32
+
+func doinit() {
+}

libgo/go/internal/cpu/cpu_mips64x.go

@@ -6,6 +6,8 @@
 
 package cpu
 
+// const CacheLinePadSize = 32
+
 // This is initialized by archauxv and should not be changed after it is
 // initialized.
 var HWCap uint

libgo/go/internal/cpu/cpu_mipsle.go

@@ -0,0 +1,10 @@
+// Copyright 2017 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.
+
+package cpu
+
+// const CacheLinePadSize = 32
+
+func doinit() {
+}

libgo/go/internal/cpu/cpu_no_name.go

@@ -4,6 +4,7 @@
 
 // +build !386
 // +build !amd64
+// +build !amd64p32
 
 package cpu
 

libgo/go/internal/cpu/cpu_other.go

@@ -7,6 +7,8 @@
 // +build !amd64p32
 // +build !arm
 // +build !arm64
+// +build !mips
+// +build !mipsle
 // +build !mips64
 // +build !mips64le
 // +build !ppc
@@ -14,6 +16,7 @@
 // +build !ppc64le
 // +build !riscv64
 // +build !s390x
+// +build !wasm
 
 package cpu
 

libgo/go/internal/cpu/cpu_ppc64x.go

@@ -0,0 +1,23 @@
+// Copyright 2017 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.
+
+// +build ppc ppc64 ppc64le
+
+package cpu
+
+// const CacheLinePadSize = 128
+
+func doinit() {
+	options = []option{
+		{Name: "darn", Feature: &PPC64.HasDARN},
+		{Name: "scv", Feature: &PPC64.HasSCV},
+		{Name: "power9", Feature: &PPC64.IsPOWER9},
+	}
+
+	osinit()
+}
+
+func isSet(hwc uint, value uint) bool {
+	return hwc&value != 0
+}

libgo/go/internal/cpu/cpu_wasm.go

@@ -0,0 +1,10 @@
+// Copyright 2018 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.
+
+package cpu
+
+// const CacheLinePadSize = 64
+
+func doinit() {
+}

libgo/go/internal/cpu/cpu_x86.go

@@ -6,6 +6,8 @@
 
 package cpu
 
+// const CacheLinePadSize = 64
+
 // cpuid is implemented in cpu_x86.s.
 func cpuid(eaxArg, ecxArg uint32) (eax, ebx, ecx, edx uint32)