runtime: support ia64 in lfstack
Patch by Andreas Schwab.
Change-Id: Idd9c3d814571d112d56656f5f0923a8e0038472b
Reviewed-on: https://go-review.googlesource.com/45071
Reviewed-by: Ian Lance Taylor <iant@golang.org>
diff --git a/libgo/go/runtime/lfstack_64bit.go b/libgo/go/runtime/lfstack_64bit.go
index b314a3b..8a39fee 100644
--- a/libgo/go/runtime/lfstack_64bit.go
+++ b/libgo/go/runtime/lfstack_64bit.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 amd64 arm64 mips64 mips64le ppc64 ppc64le s390x arm64be alpha mipsn64 sparc64
+// +build amd64 arm64 mips64 mips64le ppc64 ppc64le s390x arm64be alpha mipsn64 sparc64 ia64
package runtime
@@ -38,12 +38,22 @@
// room in the bottom for the count.
sparcLinuxAddrBits = 52
sparcLinuxCntBits = 64 - sparcLinuxAddrBits + 3
+
+ // On IA64, the virtual address space is devided into 8 regions, with
+ // 52 address bits each (with 64k page size).
+ ia64AddrBits = 55
+ ia64CntBits = 64 - ia64AddrBits + 3
)
func lfstackPack(node *lfnode, cnt uintptr) uint64 {
if GOARCH == "sparc64" && GOOS == "linux" {
return uint64(uintptr(unsafe.Pointer(node)))<<(64-sparcLinuxAddrBits) | uint64(cnt&(1<<sparcLinuxCntBits-1))
}
+ if GOARCH == "ia64" {
+ // Top three bits are the region number
+ val := uint64(uintptr(unsafe.Pointer(node)))
+ return (val<<(64-ia64AddrBits))&(1<<(64-3)-1) | val&^(1<<(64-3)-1) | uint64(cnt&(1<<ia64CntBits-1))
+ }
return uint64(uintptr(unsafe.Pointer(node)))<<(64-addrBits) | uint64(cnt&(1<<cntBits-1))
}
@@ -56,5 +66,8 @@
if GOARCH == "sparc64" && GOOS == "linux" {
return (*lfnode)(unsafe.Pointer(uintptr(int64(val) >> sparcLinuxCntBits << 3)))
}
+ if GOARCH == "ia64" {
+ return (*lfnode)(unsafe.Pointer(uintptr((val>>ia64CntBits<<3)&(1<<(64-3)-1) | val&^(1<<(64-3)-1))))
+ }
return (*lfnode)(unsafe.Pointer(uintptr(val >> cntBits << 3)))
}
