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| author | Guoqi Chen <chenguoqi@loongson.cn> | 2025-08-27 14:45:58 +0800 |
|---|---|---|
| committer | abner chenc <chenguoqi@loongson.cn> | 2025-08-31 18:32:58 -0700 |
| commit | d4b17f58695337c7eefa9d066cc51a425842e491 (patch) | |
| tree | e43a4ca62eca730ee30b4c4ded6e5ec5bf4aa46f /src/internal/runtime | |
| parent | 6a08e80399bd65b95e60e3c74b7e1f86754752a7 (diff) | |
| download | go-d4b17f58695337c7eefa9d066cc51a425842e491.tar.xz | |
internal/runtime/atomic: reset wrong jump target in Cas{,64} on loong64
The implementation here needs to be consistent with ssa.OpLOONG64LoweredAtomicCas{32,64},
which was ignored in CL 613396.
Change-Id: I72e8d2318e0c1935cc3a35ab5098f8a84e48bcd5
Reviewed-on: https://go-review.googlesource.com/c/go/+/699395
Reviewed-by: Keith Randall <khr@google.com>
LUCI-TryBot-Result: Go LUCI <golang-scoped@luci-project-accounts.iam.gserviceaccount.com>
Reviewed-by: Cherry Mui <cherryyz@google.com>
Reviewed-by: sophie zhao <zhaoxiaolin@loongson.cn>
Reviewed-by: Meidan Li <limeidan@loongson.cn>
Diffstat (limited to 'src/internal/runtime')
| -rw-r--r-- | src/internal/runtime/atomic/atomic_loong64.s | 6 |
1 files changed, 4 insertions, 2 deletions
diff --git a/src/internal/runtime/atomic/atomic_loong64.s b/src/internal/runtime/atomic/atomic_loong64.s index 95d3e2bdab..4215af24fe 100644 --- a/src/internal/runtime/atomic/atomic_loong64.s +++ b/src/internal/runtime/atomic/atomic_loong64.s @@ -19,7 +19,7 @@ TEXT ·Cas(SB), NOSPLIT, $0-17 MOVW new+12(FP), R6 MOVBU internal∕cpu·Loong64+const_offsetLOONG64HasLAMCAS(SB), R8 - BEQ R8, cas_again + BEQ R8, ll_sc MOVV R5, R7 // backup old value AMCASDBW R6, (R4), R5 BNE R7, R5, cas_fail0 @@ -30,6 +30,7 @@ cas_fail0: MOVB R0, ret+16(FP) RET +ll_sc: // Implemented using the ll-sc instruction pair DBAR $0x14 // LoadAcquire barrier cas_again: @@ -60,7 +61,7 @@ TEXT ·Cas64(SB), NOSPLIT, $0-25 MOVV new+16(FP), R6 MOVBU internal∕cpu·Loong64+const_offsetLOONG64HasLAMCAS(SB), R8 - BEQ R8, cas64_again + BEQ R8, ll_sc_64 MOVV R5, R7 // backup old value AMCASDBV R6, (R4), R5 BNE R7, R5, cas64_fail0 @@ -71,6 +72,7 @@ cas64_fail0: MOVB R0, ret+24(FP) RET +ll_sc_64: // Implemented using the ll-sc instruction pair DBAR $0x14 cas64_again: |