internal/cpu, golang.org/x/sys/cpu: support other GOARCH values

Add support (mostly dummy support) for GOARCH values supported by
gofrontend but not gc.  Fix PPC handling.

Fixes https://gcc.gnu.org/PR98493

Reviewed-on: https://go-review.googlesource.com/c/gofrontend/+/280932

9 files changed, 77 insertions, 48 deletions

diff --git a/libgo/go/golang.org/x/sys/cpu/cpu_other.go b/libgo/go/golang.org/x/sys/cpu/cpu_other.go
new file mode 100644
index 00000000000..d8bb8119f3f
--- /dev/null
+++ b/libgo/go/golang.org/x/sys/cpu/cpu_other.go
@@ -0,0 +1,23 @@
+// Copyright 2020 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 !386
+// +build !amd64
+// +build !amd64p32
+// +build !arm
+// +build !arm64
+// +build !mips
+// +build !mipsle
+// +build !mips64
+// +build !mips64le
+// +build !ppc64
+// +build !ppc64le
+// +build !riscv
+// +build !riscv64
+// +build !s390x
+// +build !wasm
+
+package cpu
+
+func initOptions() {}
diff --git a/libgo/go/golang.org/x/sys/cpu/cpu_other_arch.go b/libgo/go/golang.org/x/sys/cpu/cpu_other_arch.go
new file mode 100644
index 00000000000..aef0a82a8ef
--- /dev/null
+++ b/libgo/go/golang.org/x/sys/cpu/cpu_other_arch.go
@@ -0,0 +1,20 @@
+// Copyright 2020 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 !aix
+// +build !linux
+// +build !zos
+
+// +build !386
+// +build !amd64
+// +build !amd64p32
+// +build !arm
+// +build !arm64
+// +build !mips64
+// +build !mips64le
+// +build !wasm
+
+package cpu
+
+func archInit() {}
diff --git a/libgo/go/golang.org/x/sys/cpu/cpu_riscv.go b/libgo/go/golang.org/x/sys/cpu/cpu_riscv.go
index 891cb98b455..e229457fa38 100644
--- a/libgo/go/golang.org/x/sys/cpu/cpu_riscv.go
+++ b/libgo/go/golang.org/x/sys/cpu/cpu_riscv.go
@@ -5,3 +5,5 @@
 // +build riscv
 
 package cpu
+
+func initOptions() {}
diff --git a/libgo/go/internal/cpu/cpu_amd64p32.go b/libgo/go/internal/cpu/cpu_amd64p32.go
new file mode 100644
index 00000000000..a6cff4f096e
--- /dev/null
+++ b/libgo/go/internal/cpu/cpu_amd64p32.go
@@ -0,0 +1,7 @@
+// Copyright 2020 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 GOARCH = "amd64p32"
diff --git a/libgo/go/internal/cpu/cpu_other.go b/libgo/go/internal/cpu/cpu_other.go
new file mode 100644
index 00000000000..d0f1f2e2150
--- /dev/null
+++ b/libgo/go/internal/cpu/cpu_other.go
@@ -0,0 +1,21 @@
+// Copyright 2020 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 !386
+// +build !amd64
+// +build !amd64p32
+// +build !arm
+// +build !arm64
+// +build !mips64
+// +build !mips64le
+// +build !ppc
+// +build !ppc64
+// +build !ppc64le
+// +build !riscv64
+// +build !s390x
+
+package cpu
+
+func doinit() {
+}
diff --git a/libgo/go/internal/cpu/cpu_ppc64x_aix.go b/libgo/go/internal/cpu/cpu_ppc64x_aix.go
index b840b823bae..a932684baf2 100644
--- a/libgo/go/internal/cpu/cpu_ppc64x_aix.go
+++ b/libgo/go/internal/cpu/cpu_ppc64x_aix.go
@@ -2,7 +2,7 @@
 // Use of this source code is governed by a BSD-style
 // license that can be found in the LICENSE file.
 
-// +build ppc64 ppc64le
+// +build ppc ppc64 ppc64le
 
 package cpu
 
diff --git a/libgo/go/internal/cpu/cpu_ppc64x_linux.go b/libgo/go/internal/cpu/cpu_ppc64x_linux.go
index 73b191436df..068a799781a 100644
--- a/libgo/go/internal/cpu/cpu_ppc64x_linux.go
+++ b/libgo/go/internal/cpu/cpu_ppc64x_linux.go
@@ -2,7 +2,7 @@
 // Use of this source code is governed by a BSD-style
 // license that can be found in the LICENSE file.
 
-// +build ppc64 ppc64le
+// +build ppc ppc64 ppc64le
 
 package cpu
 
diff --git a/libgo/go/internal/cpu/cpu_ppcx.go b/libgo/go/internal/cpu/cpu_ppcx.go
deleted file mode 100644
index 56ff87524ee..00000000000
--- a/libgo/go/internal/cpu/cpu_ppcx.go
+++ /dev/null
@@ -1,44 +0,0 @@
-// 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
-
-// ppc64x 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.
-// On aix/ppc64, these values are initialized early in the runtime in runtime/os_aix.go.
-var HWCap uint
-var HWCap2 uint
-
-// HWCAP/HWCAP2 bits. These are exposed by the kernel.
-const (
-	// ISA Level
-	PPC_FEATURE2_ARCH_2_07 = 0x80000000
-	PPC_FEATURE2_ARCH_3_00 = 0x00800000
-
-	// CPU features
-	PPC_FEATURE2_DARN = 0x00200000
-	PPC_FEATURE2_SCV  = 0x00100000
-)
-
-func doinit() {
-	options = []option{
-		{Name: "darn", Feature: &PPC64.HasDARN},
-		{Name: "scv", Feature: &PPC64.HasSCV},
-		{Name: "power9", Feature: &PPC64.IsPOWER9},
-		{Name: "power8", Feature: &PPC64.IsPOWER8},
-	}
-
-	// HWCAP2 feature bits
-	PPC64.IsPOWER8 = isSet(HWCap2, PPC_FEATURE2_ARCH_2_07)
-	PPC64.IsPOWER9 = isSet(HWCap2, PPC_FEATURE2_ARCH_3_00)
-	PPC64.HasDARN = isSet(HWCap2, PPC_FEATURE2_DARN)
-	PPC64.HasSCV = isSet(HWCap2, PPC_FEATURE2_SCV)
-}
-
-func isSet(hwc uint, value uint) bool {
-	return hwc&value != 0
-}
diff --git a/libgo/go/internal/cpu/cpu_x86.go b/libgo/go/internal/cpu/cpu_x86.go
index 62853a1aebd..9aa5c3acd42 100644
--- a/libgo/go/internal/cpu/cpu_x86.go
+++ b/libgo/go/internal/cpu/cpu_x86.go
@@ -2,7 +2,7 @@
 // Use of this source code is governed by a BSD-style
 // license that can be found in the LICENSE file.
 
-// +build 386 amd64
+// +build 386 amd64 amd64p32
 
 package cpu
 
@@ -56,7 +56,7 @@ func doinit() {
 		{Name: "ssse3", Feature: &X86.HasSSSE3},
 
 		// These capabilities should always be enabled on amd64:
-		{Name: "sse2", Feature: &X86.HasSSE2, Required: GOARCH == "amd64"},
+		{Name: "sse2", Feature: &X86.HasSSE2, Required: GOARCH == "amd64" || GOARCH == "amd64p32"},
 	}
 
 	maxID, _, _, _ := cpuid(0, 0)