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runtime: support ia64 in lfstack 

Patch by Andreas Schwab.
    
    Reviewed-on: https://go-review.googlesource.com/45071

From-SVN: r248994
This commit is contained in:
Ian Lance Taylor 2017-06-07 18:12:58 +00:00
parent bfd88d1df1
commit aa5493116b
2 changed files with 15 additions and 2 deletions
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2
gcc/go/gofrontend/MERGE
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@ -1,4 +1,4 @@
7e3904e4370ccfd9062c2661c612476288244e17
eaf4afbabcd91df55d31955500b6db55b07f6de5
The first line of this file holds the git revision number of the last
merge done from the gofrontend repository.

15
libgo/go/runtime/lfstack_64bit.go
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@ -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 @@ const (
// 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 @@ func lfstackUnpack(val uint64) *lfnode {
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)))
}