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[backend]引入浮点数支持，但目前寄存器分配存在问题

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This commit is contained in:
Lixuanwang
2025-07-30 15:07:29 +08:00
parent 860ebcd447
commit dd38bdc133
10 changed files with 748 additions and 199 deletions
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31
src/backend/RISCv64/RISCv64AsmPrinter.cpp
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@@ -7,9 +7,15 @@ namespace sysy {
// 检查是否为内存加载/存储指令，以处理特殊的打印格式
bool isMemoryOp(RVOpcodes opcode) {
switch (opcode) {
// --- 整数加载/存储 (原有逻辑) ---
case RVOpcodes::LB: case RVOpcodes::LH: case RVOpcodes::LW: case RVOpcodes::LD:
case RVOpcodes::LBU: case RVOpcodes::LHU: case RVOpcodes::LWU:
case RVOpcodes::SB: case RVOpcodes::SH: case RVOpcodes::SW: case RVOpcodes::SD:
case RVOpcodes::FLW:
case RVOpcodes::FSW:
// 如果未来支持双精度，也在这里添加FLD/FSD
// case RVOpcodes::FLD:
// case RVOpcodes::FSD:
return true;
default:
return false;
@@ -73,7 +79,9 @@ void RISCv64AsmPrinter::printInstruction(MachineInstr* instr, bool debug) {
case RVOpcodes::LHU: *OS << "lhu "; break; case RVOpcodes::LBU: *OS << "lbu "; break;
case RVOpcodes::SW: *OS << "sw "; break; case RVOpcodes::SH: *OS << "sh "; break;
case RVOpcodes::SB: *OS << "sb "; break; case RVOpcodes::LD: *OS << "ld "; break;
case RVOpcodes::SD: *OS << "sd "; break;
case RVOpcodes::SD: *OS << "sd "; break; case RVOpcodes::FLW: *OS << "flw "; break;
case RVOpcodes::FSW: *OS << "fsw "; break; case RVOpcodes::FLD: *OS << "fld "; break;
case RVOpcodes::FSD: *OS << "fsd "; break;
case RVOpcodes::J: *OS << "j "; break; case RVOpcodes::JAL: *OS << "jal "; break;
case RVOpcodes::JALR: *OS << "jalr "; break; case RVOpcodes::RET: *OS << "ret"; break;
case RVOpcodes::BEQ: *OS << "beq "; break; case RVOpcodes::BNE: *OS << "bne "; break;
@@ -82,7 +90,20 @@ void RISCv64AsmPrinter::printInstruction(MachineInstr* instr, bool debug) {
case RVOpcodes::LI: *OS << "li "; break; case RVOpcodes::LA: *OS << "la "; break;
case RVOpcodes::MV: *OS << "mv "; break; case RVOpcodes::NEG: *OS << "neg "; break;
case RVOpcodes::NEGW: *OS << "negw "; break; case RVOpcodes::SEQZ: *OS << "seqz "; break;
case RVOpcodes::SNEZ: *OS << "snez "; break;
case RVOpcodes::SNEZ: *OS << "snez "; break;
case RVOpcodes::FADD_S: *OS << "fadd.s "; break;
case RVOpcodes::FSUB_S: *OS << "fsub.s "; break;
case RVOpcodes::FMUL_S: *OS << "fmul.s "; break;
case RVOpcodes::FDIV_S: *OS << "fdiv.s "; break;
case RVOpcodes::FNEG_S: *OS << "fneg.s "; break;
case RVOpcodes::FEQ_S: *OS << "feq.s "; break;
case RVOpcodes::FLT_S: *OS << "flt.s "; break;
case RVOpcodes::FLE_S: *OS << "fle.s "; break;
case RVOpcodes::FCVT_S_W: *OS << "fcvt.s.w "; break;
case RVOpcodes::FCVT_W_S: *OS << "fcvt.w.s "; break;
case RVOpcodes::FMV_S: *OS << "fmv.s "; break;
case RVOpcodes::FMV_W_X: *OS << "fmv.w.x "; break;
case RVOpcodes::FMV_X_W: *OS << "fmv.x.w "; break;
case RVOpcodes::CALL: { // [核心修改] 为CALL指令添加特殊处理逻辑
*OS << "call ";
// 遍历所有操作数，只寻找并打印函数名标签
@@ -117,6 +138,12 @@ void RISCv64AsmPrinter::printInstruction(MachineInstr* instr, bool debug) {
// It should have been eliminated by RegAlloc
if (!debug) throw std::runtime_error("FRAME pseudo-instruction not eliminated before AsmPrinter");
*OS << "frame_addr "; break;
case RVOpcodes::FRAME_LOAD_F:
if (!debug) throw std::runtime_error("FRAME_LOAD_F not eliminated before AsmPrinter");
*OS << "frame_load_f "; break;
case RVOpcodes::FRAME_STORE_F:
if (!debug) throw std::runtime_error("FRAME_STORE_F not eliminated before AsmPrinter");
*OS << "frame_store_f "; break;
default:
throw std::runtime_error("Unknown opcode in AsmPrinter");
}