在香山上仿真运行coremark,开启difftest与nemu对比验证,观察对比正确时的输出结果 在一个有bug的香山上运行coremark,开启difftest与nemu对比验证,观察对比出错时的输出结果 打印和观察波形(gtkwave) 引入lightSSS difftest简介-copy difftest(差分测试)difftest 是一个协同仿真框架,它在仿真运行时负责将香山核的输出与 ...
在清楚思路以后,我们可以仿照difftest.cc,完成ref.c的三个函数: 首先需要注意,在nemu为dut时,DIFFTEST_TO_REF是从nemu到spike,我们实现时,DIFFTEST_TO_REF就是从npc到nemu了。反之也是同理。 regcpy的基本功能就是根据方向,决定是把nemu的寄存器值给npc,还是把npc的值给nemu。内部交换值是使用memcpy()还是直接...
nemu的框架已经提供好了,只需要在inst.c里继续增加指令规则就可以实现模拟处理器运行的效果。我们选择的是riscv32。 从最简单的dummy开始,nemu报错提示没识别到指令时,就可以仿照已有的例子继续添加规则了。在这里提供一个方便分析指令的网站:rvcodec.js (luplab.gitlab.io)反汇编表提供的是已经分析过的汇编代码,...
} void __riscv_flush_icache() { // nested function support requires this function // the nemu does not have icache/dcache now // so just ignore it } int putch_i(char ch) { putch(ch); return 0; } int printf(const char *fmt, ...) { va_list ap; va_start(ap, fmt); int...
You may want to redirect the stderr to a file to capture the REF logs output by NEMU and Spike. Please avoid using --enable-fork together with other debugging options, such as -b, -e, --dump-wave, --dump-ref-trace, etc. The behavior when they are enabled simultaneously is undefined...
1. 克隆 果壳仓库 master 分支 Date: Sun Sep 11 18:35:03 2022 +0800 2. 循环初始化更新所有子模块 3. make emu-run,发现需要 NEMU,从香山仓库clone NEMU,make riscv64-nutshell-ref_defconfig 再 make,编译出 .so 文件 4. 再次 make emu-run,运行到一半报错,提示 sh: 1: spike-dasm: not found...
// can not produce consistent behavior with NEMU void difftest_skip_ref() @@ -92,34 +110,67 @@ void difftest_skip_ref() void difftest_step(vaddr_t pc, vaddr_t npc) { CPU_state ref_r; if (!detach_difftest) { CPU_state ref_r; if (skip_dut_nr_inst > 0) { ref_diff...
I've tried to set $(USE_READY_TO_RUN_NEMU) option from true to false and clone nemu, after setting NEMU_HOME, 'make emu' compiled the file riscv64-nemu-interpreter-so successfully in NEMU_HOME/build, but still, Assertion handle' failed. Also I compiled microbench-riscv64-nutshell.bin...
:deciduous_tree: A series of RISC-V soft core processor written from scratch. Now, we're using all open-source toolchain (chisel, mill, verilator, NEMU, AM and difftest framework, etc) to design and verify. - GitHub - microdynamics-cpu/tree-core-cpu: :d
Files main articles clarifications docs backend blog figs frontend huancun integration memory misc tools best_practice.md chiseldb.md compile-and-sim.md constantin.md difftest.md lightsss.md maven.patch nemu.md oraclebp.md scripts.md simpoint.md ...