| _2025-06-13_15：48：51_ | 2025-06-13 15：48：51 | | 解析RISCV fence指令 - RISC-V - 进迭RISC-V论坛 | | 原文链接失效了?试试备份 | | TAGs:处理器 risc-v ISA FENCE | | Summary: This text discusses the use of fence instructions in the RISC-V instruction set to ensure ordered memory access for specific software scenarios. Fence instructions ensure that operations before the fence occur before those after it, preventing unpredictable results. The text provides an example of how fence instructions are used to ensure the order of store and load operations for two cores. It also explains the different formats and uses of fence instructions, including fence.i for ensuring ordered memory access for instruction fetch.本文讨论了在 RISC-V 指令集中使用 fence 指令来确保特定软件场景的有序内存访问。围栏指令可确保围栏之前的作先于围栏之后的作发生，从而防止出现不可预知的结果。该文本提供了一个示例，说明如何使用 fence 指令来确保两个内核的 store 和 load 作的顺序。它还解释了 fence 指令的不同格式和用法，包括 fence.i 以确保指令获取的有序内存访问。 | |
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