51 lines
1.6 KiB
Go
51 lines
1.6 KiB
Go
// +build go1.21,!go1.23
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// Copyright 2023 CloudWeGo Authors
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//
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// Licensed under the Apache License, Version 2.0 (the "License");
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// you may not use this file except in compliance with the License.
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// You may obtain a copy of the License at
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//
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// http://www.apache.org/licenses/LICENSE-2.0
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//
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// Unless required by applicable law or agreed to in writing, software
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// distributed under the License is distributed on an "AS IS" BASIS,
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// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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// See the License for the specific language governing permissions and
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// limitations under the License.
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package encoder
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import (
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`strconv`
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`unsafe`
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`github.com/bytedance/sonic/internal/jit`
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`github.com/twitchyliquid64/golang-asm/obj`
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`github.com/twitchyliquid64/golang-asm/obj/x86`
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)
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var (
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_V_writeBarrier = jit.Imm(int64(uintptr(unsafe.Pointer(&_runtime_writeBarrier))))
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_F_gcWriteBarrier2 = jit.Func(gcWriteBarrier2)
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)
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func (self *_Assembler) WritePtr(i int, ptr obj.Addr, old obj.Addr) {
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if old.Reg == x86.REG_AX || old.Index == x86.REG_AX {
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panic("rec contains AX!")
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}
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self.Emit("MOVQ", _V_writeBarrier, _BX)
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self.Emit("CMPL", jit.Ptr(_BX, 0), jit.Imm(0))
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self.Sjmp("JE", "_no_writeBarrier" + strconv.Itoa(i) + "_{n}")
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self.xsave(_SP_q)
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self.Emit("MOVQ", _F_gcWriteBarrier2, _BX) // MOVQ ${fn}, AX
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self.Rjmp("CALL", _BX)
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self.Emit("MOVQ", ptr, jit.Ptr(_SP_q, 0))
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self.Emit("MOVQ", old, _AX)
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self.Emit("MOVQ", _AX, jit.Ptr(_SP_q, 8))
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self.xload(_SP_q)
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self.Link("_no_writeBarrier" + strconv.Itoa(i) + "_{n}")
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self.Emit("MOVQ", ptr, old)
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}
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