阶段 B 步骤 4：compiler 配置驱动化，去除 isa 依赖。

- Project.h 自带 IoBinding；Stb.h/cpp：compiler 侧 .stb 规范（常量/ConstEntry/FNV/StbView/读写/sidecar） - Codec.h/cpp：指令字 pack/字段/配置驱动 disasm（format 表驱动） - Codegen：opcode 全查 MachineConfig（E_* 发射器）、常量 tag 查配置类型、初值按基元宽度写、映像拼装用 Stb 常量；codegen_project 增加 cfg 参数 - main.cpp：--machine <path>（编译/反汇编必填），--disasm 用 StbView+Codec - CMake：compiler 不再链接 isa（仅 toml++ 私有）；测试补链 isa（自身断言用） - 验证：20 用例字节不变（hash 0xc3fe4ae74ad45900 相同）、ctest 12/12、缺 --machine 报错退出
2026-08-21 22:14:29 +08:00
parent 44b5ecd46d
commit 447a8d0119
15 changed files with 739 additions and 390 deletions
@@ -0,0 +1,65 @@
+/**
+ * @file Codec.cpp
+ * @brief 指令字编解码 + 配置驱动反汇编（编译器侧）
+ * @author 
+ * @date 2026-08-21
+ */
+
+#include "compiler/Codec.h"
+
+#include <cstdio>
+
+namespace compiler {
+
+Instr pack(uint8_t opcode, uint8_t rd, uint8_t a, uint8_t b) {
+    return static_cast<uint32_t>(opcode)
+        | (static_cast<uint32_t>(rd) << 8)
+        | (static_cast<uint32_t>(a) << 16)
+        | (static_cast<uint32_t>(b) << 24);
+}
+
+uint8_t op_of(Instr w) { return static_cast<uint8_t>(w & 0xFFu); }
+uint8_t rd_of(Instr w) { return static_cast<uint8_t>((w >> 8) & 0xFFu); }
+uint8_t a_of(Instr w) { return static_cast<uint8_t>((w >> 16) & 0xFFu); }
+uint8_t b_of(Instr w) { return static_cast<uint8_t>((w >> 24) & 0xFFu); }
+
+uint16_t imm16_of(Instr w) {
+    return static_cast<uint16_t>(a_of(w) | (static_cast<uint16_t>(b_of(w)) << 8));
+}
+
+int16_t off16_of(Instr w) { return static_cast<int16_t>(imm16_of(w)); }
+
+void disasm(const MachineConfig& cfg, Instr w, char* out, size_t cap) {
+    if (cap == 0) {
+        return;
+    }
+    out[0] = '\0';
+    const ConfigOp* op = cfg.find_op_by_code(op_of(w));
+    if (op == nullptr) {
+        snprintf(out, cap, "??? 0x%08x", static_cast<unsigned>(w));
+        return;
+    }
+    const uint8_t rd = rd_of(w);
+    const std::string& f = op->format;
+    if (f == "RR") {
+        snprintf(out, cap, "%s r%u, r%u", op->name.c_str(), static_cast<unsigned>(rd),
+                 static_cast<unsigned>(a_of(w)));
+    } else if (f == "RRR") {
+        snprintf(out, cap, "%s r%u, r%u, r%u", op->name.c_str(), static_cast<unsigned>(rd),
+                 static_cast<unsigned>(a_of(w)), static_cast<unsigned>(b_of(w)));
+    } else if (f == "IMM" || f == "SLOT") {
+        snprintf(out, cap, "%s r%u, %u", op->name.c_str(), static_cast<unsigned>(rd),
+                 static_cast<unsigned>(imm16_of(w)));
+    } else if (f == "JMP") {
+        snprintf(out, cap, "%s %+d", op->name.c_str(), static_cast<int>(off16_of(w)));
+    } else if (f == "JC") {
+        snprintf(out, cap, "%s r%u, %+d", op->name.c_str(), static_cast<unsigned>(rd),
+                 static_cast<int>(off16_of(w)));
+    } else if (f == "CALL" || f == "CAL") {
+        snprintf(out, cap, "%s %u", op->name.c_str(), static_cast<unsigned>(imm16_of(w)));
+    } else {  // NONE
+        snprintf(out, cap, "%s", op->name.c_str());
+    }
+}
+
+}  // namespace compiler