diff options
| author | Paul E. Murphy <murp@ibm.com> | 2024-10-02 13:31:37 -0500 |
|---|---|---|
| committer | Paul Murphy <murp@ibm.com> | 2024-10-07 19:20:23 +0000 |
| commit | 15618840f6d416cc9da34505a5ea5190ff15c3aa (patch) | |
| tree | 40f8c2e4a160efe1977d5a8aef6e4f2a7c71a1bf /src/internal/runtime | |
| parent | 604eaa175bfaadfb868d6add76325020b6e13048 (diff) | |
| download | go-15618840f6d416cc9da34505a5ea5190ff15c3aa.tar.xz | |
cmd/compile: add internal/runtime/atomic.Xchg8 intrinsic for PPC64
This is minor extension of the existing support for 32 and
64 bit types.
For #69735
Change-Id: I6828ec223951d2b692e077dc507b000ac23c32a1
Reviewed-on: https://go-review.googlesource.com/c/go/+/617496
Reviewed-by: Rhys Hiltner <rhys.hiltner@gmail.com>
Reviewed-by: Cherry Mui <cherryyz@google.com>
Reviewed-by: Keith Randall <khr@golang.org>
LUCI-TryBot-Result: Go LUCI <golang-scoped@luci-project-accounts.iam.gserviceaccount.com>
Reviewed-by: Mauri de Souza Meneguzzo <mauri870@gmail.com>
Reviewed-by: Keith Randall <khr@google.com>
Diffstat (limited to 'src/internal/runtime')
| -rw-r--r-- | src/internal/runtime/atomic/atomic_ppc64x.go | 3 | ||||
| -rw-r--r-- | src/internal/runtime/atomic/atomic_ppc64x.s | 16 | ||||
| -rw-r--r-- | src/internal/runtime/atomic/xchg8_test.go | 2 |
3 files changed, 20 insertions, 1 deletions
diff --git a/src/internal/runtime/atomic/atomic_ppc64x.go b/src/internal/runtime/atomic/atomic_ppc64x.go index 33a92b53f4..590ba03ecf 100644 --- a/src/internal/runtime/atomic/atomic_ppc64x.go +++ b/src/internal/runtime/atomic/atomic_ppc64x.go @@ -18,6 +18,9 @@ func Xadd64(ptr *uint64, delta int64) uint64 func Xadduintptr(ptr *uintptr, delta uintptr) uintptr //go:noescape +func Xchg8(ptr *uint8, new uint8) uint8 + +//go:noescape func Xchg(ptr *uint32, new uint32) uint32 //go:noescape diff --git a/src/internal/runtime/atomic/atomic_ppc64x.s b/src/internal/runtime/atomic/atomic_ppc64x.s index 75635b933d..184a30c970 100644 --- a/src/internal/runtime/atomic/atomic_ppc64x.s +++ b/src/internal/runtime/atomic/atomic_ppc64x.s @@ -236,6 +236,22 @@ TEXT ·Xadd64(SB), NOSPLIT, $0-24 MOVD R3, ret+16(FP) RET +// uint8 Xchg(ptr *uint8, new uint8) +// Atomically: +// old := *ptr; +// *ptr = new; +// return old; +TEXT ·Xchg8(SB), NOSPLIT, $0-17 + MOVD ptr+0(FP), R4 + MOVB new+8(FP), R5 + LWSYNC + LBAR (R4), R3 + STBCCC R5, (R4) + BNE -2(PC) + ISYNC + MOVB R3, ret+16(FP) + RET + // uint32 Xchg(ptr *uint32, new uint32) // Atomically: // old := *ptr; diff --git a/src/internal/runtime/atomic/xchg8_test.go b/src/internal/runtime/atomic/xchg8_test.go index 139062422e..b0b39c2dd7 100644 --- a/src/internal/runtime/atomic/xchg8_test.go +++ b/src/internal/runtime/atomic/xchg8_test.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. -//go:build amd64 +//go:build amd64 || ppc64 || ppc64le package atomic_test |