Merge pull request #68 from bdunahu/bdunahu

[WIP] Pipeline cleanup and revisited GUI storage display

1 files changed, 452 insertions, 0 deletions

diff --git a/src/ex.cc b/src/ex.cc
new file mode 100644
index 0000000..eac24ff
--- /dev/null
+++ b/src/ex.cc
@@ -0,0 +1,452 @@
+// Simulator for the RISC-V[ECTOR] mini-ISA
+// Copyright (C) 2025 Siddarth Suresh
+// Copyright (C) 2025 bdunahu
+
+// This program is free software: you can redistribute it and/or modify
+// it under the terms of the GNU General Public License as published by
+// the Free Software Foundation, either version 3 of the License, or
+// (at your option) any later version.
+
+// This program is distributed in the hope that it will be useful,
+// but WITHOUT ANY WARRANTY; without even the implied warranty of
+// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+// GNU General Public License for more details.
+
+// You should have received a copy of the GNU General Public License
+// along with this program.  If not, see <https://www.gnu.org/licenses/>.
+
+#include "ex.h"
+#include "instrDTO.h"
+#include "pipe_spec.h"
+#include "response.h"
+#include "stage.h"
+#include <unordered_map>
+
+// clang-format off
+#define INIT_INSTRUCTION(mnemonic, body)					\
+	{mnemonic, [this](signed int &s1, signed int s2, signed int s3, unsigned int pc) {	\
+		body; \
+	}}
+// clang-format on
+
+EX::EX(Stage *stage) : Stage(stage)
+{
+	instr_map = {
+
+		/* R type instructions */
+		INIT_INSTRUCTION(
+			ADD,
+			{
+				this->set_condition(OF, ADDITION_OF_GUARD(s1, s2));
+				this->set_condition(UF, ADDITION_UF_GUARD(s1, s2));
+				s1 = s1 + s2;
+				(void)pc;
+				(void)s3;
+				(void)this;
+			}),
+
+		INIT_INSTRUCTION(
+			SUB,
+			{
+				this->set_condition(OF, SUBTRACTION_OF_GUARD(s1, s2));
+				this->set_condition(UF, SUBTRACTION_UF_GUARD(s1, s2));
+				s1 = s1 - s2;
+				(void)pc;
+				(void)s3;
+				(void)this;
+			}),
+
+		INIT_INSTRUCTION(
+			MUL,
+			{
+				this->set_condition(OF, MULTIPLICATION_OF_GUARD(s1, s2));
+				this->set_condition(UF, MULTIPLICATION_UF_GUARD(s1, s2));
+				s1 = s1 * s2;
+				(void)pc;
+				(void)s3;
+				(void)this;
+			}),
+
+		INIT_INSTRUCTION(
+			QUOT,
+			{
+				this->handle_divide(s1, s2, false);
+				(void)pc;
+				(void)s3;
+			}),
+
+		INIT_INSTRUCTION(
+			REM,
+			{
+				this->handle_divide(s1, s2, true);
+				(void)pc;
+				(void)s3;
+				(void)this;
+			}),
+
+		INIT_INSTRUCTION(
+			SFTR,
+			{
+				s1 = s1 >> s2;
+				(void)pc;
+				(void)s3;
+				(void)this;
+			}),
+
+		INIT_INSTRUCTION(
+			SFTL,
+			{
+				s1 = s1 << s2;
+				(void)pc;
+				(void)s3;
+				(void)this;
+			}),
+
+		INIT_INSTRUCTION(
+			AND,
+			{
+				this->set_condition(OF, false);
+				this->set_condition(UF, false);
+				s1 = s1 & s2;
+				(void)pc;
+				(void)s3;
+				(void)this;
+			}),
+
+		INIT_INSTRUCTION(
+			OR,
+			{
+				this->set_condition(OF, false);
+				this->set_condition(UF, false);
+				s1 = s1 | s2;
+				(void)pc;
+				(void)s3;
+				(void)this;
+			}),
+
+		INIT_INSTRUCTION(
+			NOT,
+			{
+				this->set_condition(OF, false);
+				this->set_condition(UF, false);
+				s1 = ~s1;
+				(void)pc;
+				(void)s3;
+				(void)s2;
+				(void)this;
+			}),
+
+		INIT_INSTRUCTION(
+			XOR,
+			{
+				this->set_condition(OF, false);
+				this->set_condition(UF, false);
+				s1 = s1 ^ s2;
+				(void)pc;
+				(void)s3;
+				(void)this;
+			}),
+
+		INIT_INSTRUCTION(
+			ADDV,
+			{
+				(void)pc;
+				(void)s3;
+				(void)s2;
+				(void)s1;
+				(void)this;
+			}),
+
+		INIT_INSTRUCTION(
+			SUBV,
+			{
+				(void)pc;
+				(void)s3;
+				(void)s2;
+				(void)s1;
+				(void)this;
+			}),
+
+		INIT_INSTRUCTION(
+			MULV,
+			{
+				(void)pc;
+				(void)s3;
+				(void)s2;
+				(void)s1;
+				(void)this;
+			}),
+
+		INIT_INSTRUCTION(
+			DIVV,
+			{
+				(void)pc;
+				(void)s3;
+				(void)s2;
+				(void)s1;
+				(void)this;
+			}),
+
+		INIT_INSTRUCTION(
+			CMP,
+			{
+				(s1 > s2) ? this->set_condition(GT, true)
+						  : this->set_condition(GT, false);
+				(s1 == s2) ? this->set_condition(EQ, true)
+						   : this->set_condition(EQ, false);
+				(void)pc;
+				(void)s3;
+			}),
+
+		INIT_INSTRUCTION(
+			CEV,
+			{
+				(void)pc;
+				(void)s3;
+				(void)s2;
+				(void)s1;
+				(void)this;
+			}),
+
+		/* I type instructions */
+		INIT_INSTRUCTION(
+			LOAD,
+			{
+				s1 = s1 + s3;
+				(void)pc;
+				(void)s2;
+				(void)this;
+			}),
+
+		INIT_INSTRUCTION(
+			LOADV,
+			{
+				(void)pc;
+				(void)s3;
+				(void)s2;
+				(void)s1;
+				(void)this;
+			}),
+
+		INIT_INSTRUCTION(
+			ADDI,
+			{
+				this->set_condition(OF, ADDITION_OF_GUARD(s1, s3));
+				this->set_condition(UF, ADDITION_UF_GUARD(s1, s3));
+				s1 = s1 + s3;
+				(void)pc;
+				(void)s2;
+				(void)this;
+			}),
+
+		INIT_INSTRUCTION(
+			SUBI,
+			{
+				this->set_condition(OF, SUBTRACTION_OF_GUARD(s1, s3));
+				this->set_condition(UF, SUBTRACTION_UF_GUARD(s1, s3));
+				s1 = s1 - s3;
+				(void)pc;
+				(void)s2;
+				(void)this;
+			}),
+
+		INIT_INSTRUCTION(
+			SFTRI,
+			{
+				s1 = s1 >> s3;
+				(void)pc;
+				(void)s2;
+				(void)this;
+			}),
+
+		INIT_INSTRUCTION(
+			SFTLI,
+			{
+				s1 = s1 << s3;
+				(void)pc;
+				(void)s2;
+				(void)this;
+			}),
+
+		INIT_INSTRUCTION(
+			ANDI,
+			{
+				this->set_condition(OF, false);
+				this->set_condition(UF, false);
+				s1 = s1 & s3;
+				(void)pc;
+				(void)s2;
+				(void)this;
+			}),
+
+		INIT_INSTRUCTION(
+			ORI,
+			{
+				this->set_condition(OF, false);
+				this->set_condition(UF, false);
+				s1 = s1 | s3;
+				(void)pc;
+				(void)s2;
+				(void)this;
+			}),
+
+		INIT_INSTRUCTION(
+			XORI,
+			{
+				this->set_condition(OF, false);
+				this->set_condition(UF, false);
+				s1 = s1 ^ s3;
+				(void)pc;
+				(void)s2;
+				(void)this;
+			}),
+
+		INIT_INSTRUCTION(
+			STORE,
+			{
+				s1 = s1 + s3;
+				(void)pc;
+				(void)s2;
+				(void)this;
+			}),
+
+		INIT_INSTRUCTION(
+			STOREV,
+			{
+				(void)pc;
+				(void)s3;
+				(void)s2;
+				(void)s1;
+				(void)this;
+			}),
+
+		/* J type instructions */
+		INIT_INSTRUCTION(
+			JMP,
+			{
+				s1 = s1 + s2;
+				(void)pc;
+				(void)s3;
+				(void)this;
+			}),
+
+		INIT_INSTRUCTION(
+			JRL,
+			{
+				s1 = pc + s2;
+				(void)s3;
+				(void)this;
+			}),
+
+		INIT_INSTRUCTION(
+			JAL,
+			{
+				s1 = s1 + s2;
+				(void)pc;
+				(void)s3;
+				(void)this;
+			}),
+
+		INIT_INSTRUCTION(
+			BEQ,
+			{
+				(this->get_condition(EQ)) ? s1 = pc + s2 : s1 = -1;
+				(void)s3;
+			}),
+
+		INIT_INSTRUCTION(
+			BGT,
+			{
+				(this->get_condition(GT)) ? s1 = pc + s2 : s1 = -1;
+				(void)s3;
+			}),
+
+		INIT_INSTRUCTION(
+			BUF,
+			{
+				(this->get_condition(UF)) ? s1 = pc + s2 : s1 = -1;
+				(void)s3;
+			}),
+
+		INIT_INSTRUCTION(
+			BOF,
+			{
+				(this->get_condition(OF)) ? s1 = pc + s2 : s1 = -1;
+				(void)s3;
+			}),
+
+		INIT_INSTRUCTION(
+			PUSH,
+			{
+				s1 = s1 + s3;
+				(void)pc;
+				(void)s2;
+				(void)this;
+			}),
+
+		INIT_INSTRUCTION(
+			POP,
+			{
+				s1 = s1 + s3;
+				(void)pc;
+				(void)s2;
+				(void)this;
+			}),
+
+		INIT_INSTRUCTION(
+			RET,
+			{
+				(void)pc;
+				(void)s3;
+				(void)s2;
+				(void)s1;
+				(void)this;
+			}),
+
+		/* NOP */
+		INIT_INSTRUCTION(
+			NOP,
+			{
+				(void)pc;
+				(void)s3;
+				(void)s2;
+				(void)s1;
+				(void)this;
+			}),
+	};
+}
+
+void EX::advance_helper()
+{
+	signed int s1, s2, s3;
+	unsigned int pc;
+	Mnemonic m;
+
+	m = this->curr_instr->mnemonic;
+	s1 = this->curr_instr->operands.integer.slot_one;
+	s2 = this->curr_instr->operands.integer.slot_two;
+	s3 = this->curr_instr->operands.integer.slot_three;
+	pc = this->curr_instr->slot_B;
+
+	this->instr_map[m](s1, s2, s3, pc);
+
+	this->curr_instr->operands.integer.slot_one = s1;
+	this->status = OK;
+}
+
+void EX::handle_divide(signed int &s1, signed int s2, bool is_mod)
+{
+	this->set_condition(OF, DIVISION_OF_GUARD(s1, s2));
+	this->set_condition(UF, false);
+	if (s2 == 0) {
+		// handle everything here
+		this->curr_instr->operands.integer.slot_one = MAX_INT;
+		this->status = OK;
+		throw HaltException();
+	} else if ((s1 == -(MAX_INT)-1) && s2 == -1) {
+		// undefined in C++
+		s1 = -(MAX_INT)-1;
+	} else {
+		s1 = (is_mod) ? (s1 % s2) : (s1 / s2);
+	}
+}