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SimX timing simulation

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This commit is contained in:
Blaise Tine
2021-11-13 01:41:12 -05:00
parent 009e897cab
commit c2721fd545
26 changed files with 3690 additions and 1639 deletions
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12
sim/simX/decode.cpp
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@@ -281,7 +281,7 @@ Decoder::Decoder(const ArchDef &arch) {
v_imm_mask_ = 0x7ff;
}
std::shared_ptr<Instr> Decoder::decode(Word code, Word PC) {
std::shared_ptr<Instr> Decoder::decode(Word code, Word PC) const {
auto instr = std::make_shared<Instr>();
Opcode op = (Opcode)((code >> shift_opcode_) & opcode_mask_);
instr->setOpcode(op);
@@ -351,9 +351,9 @@ std::shared_ptr<Instr> Decoder::decode(Word code, Word PC) {
instr->setFunc3(func3);
instr->setFunc7(func7);
if ((func3 == 5) && (op != L_INST) && (op != Opcode::FL)) {
instr->setImm(signExt(rs2, 5, reg_mask_));
instr->setImm(sext32(rs2, 5));
} else {
instr->setImm(signExt(code >> shift_rs2_, 12, i_imm_mask_));
instr->setImm(sext32(code >> shift_rs2_, 12));
}
} break;
@@ -366,7 +366,7 @@ std::shared_ptr<Instr> Decoder::decode(Word code, Word PC) {
}
instr->setFunc3(func3);
Word imeed = (func7 << reg_s_) | rd;
instr->setImm(signExt(imeed, 12, s_imm_mask_));
instr->setImm(sext32(imeed, 12));
} break;
case InstType::B_TYPE: {
@@ -378,12 +378,12 @@ std::shared_ptr<Instr> Decoder::decode(Word code, Word PC) {
Word bit_10_5 = func7 & 0x3f;
Word bit_12 = func7 >> 6;
Word imeed = (bits_4_1 << 1) | (bit_10_5 << 5) | (bit_11 << 11) | (bit_12 << 12);
instr->setImm(signExt(imeed, 13, b_imm_mask_));
instr->setImm(sext32(imeed, 13));
} break;
case InstType::U_TYPE:
instr->setDestReg(rd);
instr->setImm(signExt(code >> shift_func3_, 20, u_imm_mask_));
instr->setImm(sext32(code >> shift_func3_, 20));
break;
case InstType::J_TYPE: {