731 lines
30 KiB
Plaintext
731 lines
30 KiB
Plaintext
\m4_TLV_version 1d: tl-x.org
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\SV
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m4_include_lib(['https://raw.githubusercontent.com/stevehoover/warp-v_includes/2d6d36baa4d2bc62321f982f78c8fe1456641a43/risc-v_defs.tlv'])
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m4+definitions(['
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m4_define_vector(['M4_WORD'], 32)
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m4_define(['M4_EXT_I'], 1)
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m4_define(['M4_NUM_INSTRS'], 0)
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m4_echo(m4tlv_riscv_gen__body())
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'])
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\TLV fill_imem()
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// The program in an instruction memory.
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\SV_plus
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logic [31:0] instrs [0:M4_NUM_INSTRS-1];
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`define READONLY_MEM(ADDR, DATA) assign DATA = instrs[ADDR[\$clog2(\$size(instrs)) + 1 : 2]]; // Verilog macro for use by students
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assign instrs = '{
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m4_instr0['']m4_forloop(['m4_instr_ind'], 1, M4_NUM_INSTRS, [', m4_echo(['m4_instr']m4_instr_ind)'])
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};
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logic sticky_zero;
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assign sticky_zero = 0;
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$valid = !*failed;
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`BOGUS_USE($valid)
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\TLV rf(_entries, _width, $_reset, $_port1_en, $_port1_index, $_port1_data, $_port2_en, $_port2_index, $$_port2_data, $_port3_en, $_port3_index, $$_port3_data)
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m4_ifelse_block(m4_sp_graph_dangerous, 1, [''], ['
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/rf_viz
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$ANY = /top<>0$ANY;
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$viz_rf_reset = m4_argn(3, $@);
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$viz_rf_wr_en = m4_argn(4, $@);
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$viz_rf_wr_index[\$clog2(_entries)-1:0] = m4_argn(5, $@);
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$viz_rf_wr_data[_width-1:0] = m4_argn(6, $@);
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$viz_rf_rd_en1 = m4_argn(7, $@);
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$viz_rf_rd_index1[\$clog2(_entries)-1:0] = m4_argn(8, $@);
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$viz_rf_rd_en2 = m4_argn(10, $@);
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$viz_rf_rd_index2[\$clog2(_entries)-1:0] = m4_argn(11, $@);
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/xreg[_entries-1:0]
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$ANY = /top/rf_viz<>0$ANY;
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$wr = $viz_rf_wr_en && ($viz_rf_wr_index == #xreg);
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$value[_width-1:0] = $viz_rf_reset ? #xreg :
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>>1$wr ? >>1$viz_rf_wr_data :
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$RETAIN;
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$$_port2_data[_width-1:0] = /top/rf_viz<>0$viz_rf_rd_en1 ? /xreg[/top/rf_viz<>0$viz_rf_rd_index1]$value : 'X;
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$$_port3_data[_width-1:0] = /top/rf_viz<>0$viz_rf_rd_en2 ? /xreg[/top/rf_viz<>0$viz_rf_rd_index2]$value : 'X;
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'])
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\TLV dmem(_entries, _width, $_reset, $_port1_en, $_port1_index, $_port1_data, $_port2_en, $_port2_index, $$_port2_data)
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m4_ifelse_block(m4_sp_graph_dangerous, 1, [''], ['
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/dmem_viz
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$ANY = /top<>0$ANY;
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$viz_dmem_reset = m4_argn(3, $@);
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$viz_dmem_wr_en = m4_argn(4, $@);
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$viz_dmem_wr_index[\$clog2(_entries)-1:0] = m4_argn(5, $@);
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$viz_dmem_wr_data[_width-1:0] = m4_argn(6, $@);
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$viz_dmem_rd_en = m4_argn(7, $@);
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$viz_dmem_rd_index[\$clog2(_entries)-1:0] = m4_argn(8, $@);
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/dmem[_entries-1:0]
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$ANY = /top/dmem_viz<>0$ANY;
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$wr = $viz_dmem_wr_en && ($viz_dmem_wr_index == #dmem);
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$value[_width-1:0] = $viz_dmem_reset ? #dmem :
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>>1$wr ? >>1$viz_dmem_wr_data :
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$RETAIN;
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$$_port2_data[_width-1:0] = /top/dmem_viz<>0$viz_dmem_rd_en ? /dmem[/top/dmem_viz<>0$viz_dmem_rd_index]$value : 'X;
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'])
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\TLV cpu_viz()
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m4_ifelse_block(m4_sp_graph_dangerous, 1, [''], ['
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// String representations of the instructions for debug.
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\SV_plus
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logic [40*8-1:0] instr_strs [0:M4_NUM_INSTRS];
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assign instr_strs = '{m4_asm_mem_expr "END "};
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/cpuviz
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$fetch_instr_str[40*8-1:0] = *instr_strs\[/top$pc[\$clog2(M4_NUM_INSTRS+1)+1:2]\];
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\viz_alpha
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initEach() {
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let imem_header = new fabric.Text("📒 Instr. Memory", {
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top: -29,
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left: -440,
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fontSize: 18,
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fontWeight: 800,
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fontFamily: "monospace"
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})
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let decode_header = new fabric.Text("⚙️ Instr. Decode", {
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top: 0,
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left: 40,
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fontSize: 18,
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fontWeight: 800,
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fontFamily: "monospace"
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})
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let rf_header = new fabric.Text("📂 Reg. File", {
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top: -29 - 40,
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left: 280,
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fontSize: 18,
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fontWeight: 800,
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fontFamily: "monospace"
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})
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let dmem_header = new fabric.Text("🗃️ Data Memory", {
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top: -29 - 40,
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left: 450,
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fontSize: 18,
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fontWeight: 800,
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fontFamily: "monospace"
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})
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let error_header = new fabric.Text("🚨 Missing Signals", {
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top: 350,
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left: -400,
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fontSize: 18,
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fontWeight: 800,
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fill: "red",
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fontFamily: "monospace"
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})
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let error_box = new fabric.Rect({
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top: 400,
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left: -500,
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fill: "#ffffe0",
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width: 400,
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height: 300,
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stroke: "black"
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})
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return {objects: {imem_header, decode_header, rf_header, dmem_header, error_header, error_box}};
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},
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renderEach: function() {
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debugger
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//
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var missing_list = "";
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let sticky_zero = this.svSigRef(`sticky_zero`);
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siggen = (name) => {
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var sig = this.svSigRef(`L0_${name}_a0`)
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if (sig == null) {
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missing_list += `◾ $${name} \n`;
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sig = sticky_zero;
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}
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return sig
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}
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siggen_rf_dmem = (name, scope) => {
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var sig = this.svSigRef(`${scope}_${name}_a0`)
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if (sig == null) {
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sig = sticky_zero;
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}
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return sig
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}
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siggen_mnemonic = () => {
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instrs = ["lui", "auipc", "jal", "jalr", "beq", "bne", "blt", "bge", "bltu", "bgeu", "lb", "lh", "lw", "lbu", "lhu", "sb", "sh", "sw", "addi", "slti", "sltiu", "xori", "ori", "andi", "slli", "srli", "srai", "add", "sub", "sll", "slt", "sltu", "xor", "srl", "sra", "or", "and", "csrrw", "csrrs", "csrrc", "csrrwi", "csrrsi", "csrrci", "load", "store"];
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for(i=0;i<instrs.length;i++) {
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var sig = this.svSigRef(`L0_is_${instrs[i]}_a0`)
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if(sig != null) {
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if (sig.asBool()) {
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return instrs[i].toUpperCase()
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}
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}
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}
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return "ILLEGAL"
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}
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let example = siggen("error_eg")
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let pc = siggen("pc");
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let rd_valid = siggen("rd_valid");
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let rd = siggen("rd");
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let result = siggen("result");
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let src1_value = siggen("src1_value");
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let src2_value = siggen("src2_value");
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let imm = siggen("imm");
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let imm_valid = siggen("imm_valid");
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let rs1 = siggen("rs1");
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let rs2 = siggen("rs2");
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let rs1_valid = siggen("rs1_valid");
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let rs2_valid = siggen("rs2_valid");
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let valid = siggen("valid");
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let mnemonic = siggen_mnemonic();
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let rf_rd_en1 = siggen_rf_dmem("viz_rf_rd_en1", "RfViz")
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let rf_rd_index1 = siggen_rf_dmem("viz_rf_rd_index1", "RfViz")
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let rf_rd_en2 = siggen_rf_dmem("viz_rf_rd_en2", "RfViz")
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let rf_rd_index2 = siggen_rf_dmem("viz_rf_rd_index2", "RfViz")
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let rf_wr_en = siggen_rf_dmem("viz_rf_wr_en", "RfViz")
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let rf_wr_index = siggen_rf_dmem("viz_rf_wr_index", "RfViz")
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let rf_wr_data = siggen_rf_dmem("viz_rf_wr_data", "RfViz")
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let dmem_rd_en = siggen_rf_dmem("viz_dmem_rd_en", "DmemViz")
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let dmem_rd_index = siggen_rf_dmem("viz_dmem_rd_index", "DmemViz")
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let dmem_wr_en = siggen_rf_dmem("viz_dmem_wr_en", "DmemViz")
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let dmem_wr_index = siggen_rf_dmem("viz_dmem_wr_index", "DmemViz")
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let color = !(valid.asBool()) ? "gray" :
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"blue";
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let pcPointer = new fabric.Text("👉", {
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top: 18 * (pc.asInt() >> 2),
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left: -295,
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fill: color,
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fontSize: 14,
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fontFamily: "monospace"
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})
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let pc_arrow = new fabric.Line([23, 18 * (pc.asInt() >> 2) + 6, 46, 35], {
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stroke: "#d0e8ff",
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strokeWidth: 2
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})
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let rs1_arrow = new fabric.Line([330, 18 * rf_rd_index1.asInt() + 6 - 40, 190, 75 + 18 * 2], {
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stroke: "#d0e8ff",
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strokeWidth: 2,
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visible: rf_rd_en1.asBool()
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})
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let rs2_arrow = new fabric.Line([330, 18 * rf_rd_index2.asInt() + 6 - 40, 190, 75 + 18 * 3], {
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stroke: "#d0e8ff",
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strokeWidth: 2,
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visible: rf_rd_en2.asBool()
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})
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let rd_arrow = new fabric.Line([310, 18 * rf_wr_index.asInt() + 6 - 40, 168, 75 + 18 * 0], {
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stroke: "#d0d0ff",
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strokeWidth: 3,
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visible: rf_wr_en.asBool()
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})
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let ld_arrow = new fabric.Line([470, 18 * dmem_rd_index.asInt() + 6 - 40, 175, 75 + 18 * 1], {
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stroke: "#d0e8ff",
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strokeWidth: 2,
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visible: dmem_rd_en.asBool()
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})
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let st_arrow = new fabric.Line([470, 18 * dmem_wr_index.asInt() + 6 - 40, 175, 75 + 18 * 1], {
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stroke: "#d0d0ff",
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strokeWidth: 3,
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visible: dmem_wr_en.asBool()
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})
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//
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// Fetch Instruction
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//
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// TODO: indexing only works in direct lineage. let fetchInstr = new fabric.Text('|fetch/instr_mem[$Pc]$instr'.asString(), { // TODO: make indexing recursive.
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//let fetchInstr = new fabric.Text('$raw'.asString("--"), {
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// top: 50,
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// left: 90,
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// fill: color,
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// fontSize: 14,
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// fontFamily: "monospace"
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//});
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//
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// Instruction with values.
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//
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let regStr = (valid, regNum, regValue) => {
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return valid ? `r${regNum}` : `rX` // valid ? `r${regNum} (${regValue})` : `rX`
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};
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let immStr = (valid, immValue) => {
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immValue = parseInt(immValue,2) + 2*(immValue[0] << 31)
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return valid ? `i[${immValue}]` : ``;
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};
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let srcStr = ($src, $valid, $reg, $value) => {
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return $valid.asBool(false)
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? `\n ${regStr(true, $reg.asInt(NaN), $value.asInt(NaN))}`
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: "";
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};
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let str = `${regStr(rd_valid.asBool(false), rd.asInt(NaN), result.asInt(NaN))}\n` +
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` = ${mnemonic}${srcStr(1, rs1_valid, rs1, src1_value)}${srcStr(2, rs2_valid, rs2, src2_value)}\n` +
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` ${immStr(imm_valid.asBool(false), imm.asBinaryStr())}`;
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let instrWithValues = new fabric.Text(str, {
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top: 70,
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left: 65,
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fill: color,
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fontSize: 14,
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fontFamily: "monospace"
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});
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// Animate fetch (and provide onChange behavior for other animation).
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let fetch_instr_viz = new fabric.Text('$fetch_instr_str'.asString(), {
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top: 18 * (pc.asInt() >> 2),
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left: -272,
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fill: "blue",
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fontSize: 14,
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fontFamily: "monospace"
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})
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fetch_instr_viz.animate({top: 32, left: 50}, {
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onChange: this.global.canvas.renderAll.bind(this.global.canvas),
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duration: 500
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});
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let src1_value_viz = new fabric.Text(src1_value.asInt(0).toString(), {
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left: 316 + 8 * 4,
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top: 18 * rs1.asInt(0) - 40,
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fill: "blue",
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fontSize: 14,
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fontFamily: "monospace",
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fontWeight: 800,
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visible: rs1_valid.asBool(false)
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})
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setTimeout(() => {src1_value_viz.animate({left: 166, top: 70 + 18 * 2}, {
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onChange: this.global.canvas.renderAll.bind(this.global.canvas),
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duration: 500
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})}, 500)
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let src2_value_viz = new fabric.Text(src2_value.asInt(0).toString(), {
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left: 316 + 8 * 4,
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top: 18 * rs2.asInt(0) - 40,
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fill: "blue",
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fontSize: 14,
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fontFamily: "monospace",
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fontWeight: 800,
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visible: rs2_valid.asBool(false)
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})
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setTimeout(() => {src2_value_viz.animate({left: 166, top: 70 + 18 * 3}, {
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onChange: this.global.canvas.renderAll.bind(this.global.canvas),
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duration: 500
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})}, 500)
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let load_viz = new fabric.Text(rf_wr_data.asInt(0).toString(), {
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left: 470,
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top: 18 * dmem_rd_index.asInt() + 6 - 40,
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fill: "blue",
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fontSize: 14,
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fontFamily: "monospace",
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fontWeight: 1000,
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visible: false
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})
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if (dmem_rd_en.asBool()) {
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setTimeout(() => {
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load_viz.setVisible(true)
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load_viz.animate({left: 165, top: 75 + 18 * 1 - 5}, {
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onChange: this.global.canvas.renderAll.bind(this.global.canvas),
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duration: 500
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})
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setTimeout(() => {
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load_viz.setVisible(true)
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load_viz.animate({left: 350, top: 18 * rf_wr_index.asInt() - 40}, {
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onChange: this.global.canvas.renderAll.bind(this.global.canvas),
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duration: 500
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})
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}, 1000)
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}, 500)
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}
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let store_viz = new fabric.Text(src2_value.asInt(0).toString(), {
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left: 165,
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top: 75 + 18 * 1 - 5,
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fill: "blue",
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fontSize: 14,
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fontFamily: "monospace",
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fontWeight: 1000,
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visible: false
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})
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if (dmem_wr_en.asBool()) {
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setTimeout(() => {
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store_viz.setVisible(true)
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store_viz.animate({left: 515, top: 18 * dmem_wr_index.asInt() - 40}, {
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onChange: this.global.canvas.renderAll.bind(this.global.canvas),
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duration: 500
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})
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}, 1000)
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}
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let result_shadow = new fabric.Text(result.asInt(0).toString(), {
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left: 146,
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top: 70,
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fill: "#d0d0ff",
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fontSize: 14,
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fontFamily: "monospace",
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fontWeight: 800,
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visible: false
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})
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let result_viz = new fabric.Text(result.asInt(0).toString(), {
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left: 146,
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top: 70,
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fill: "blue",
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fontSize: 14,
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fontFamily: "monospace",
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fontWeight: 800,
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visible: false
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})
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if (rd_valid.asBool() && !dmem_rd_en.asBool()) {
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setTimeout(() => {
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result_viz.setVisible(true)
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result_shadow.setVisible(true)
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result_viz.animate({left: 317 + 8 * 4, top: 18 * rd.asInt(0) - 40}, {
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onChange: this.global.canvas.renderAll.bind(this.global.canvas),
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duration: 500
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})
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}, 1000)
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}
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let missing_fill = new fabric.Text(missing_list, {
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top: 420,
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left: -480,
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fontSize: 16,
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fontWeight: 500,
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fontFamily: "monospace",
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fill: "purple"
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})
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return {objects: [pcPointer, pc_arrow, rs1_arrow, rs2_arrow, rd_arrow, instrWithValues, fetch_instr_viz, src1_value_viz, src2_value_viz, result_shadow, result_viz, ld_arrow, st_arrow, load_viz, store_viz, missing_fill]};
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}
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/imem[m4_eval(M4_NUM_INSTRS-1):0] // TODO: Cleanly report non-integer ranges.
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$instr[31:0] = *instrs\[#imem\];
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$instr_str[40*8-1:0] = *instr_strs[imem];
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\viz_alpha
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initEach() {
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let binary = new fabric.Text("", {
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top: 18 * this.getIndex(), // TODO: Add support for '#instr_mem'.
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left: -600,
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fontSize: 14,
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fontFamily: "monospace"
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})
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let disassembled = new fabric.Text("", {
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top: 18 * this.getIndex(), // TODO: Add support for '#instr_mem'.
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left: -270,
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fontSize: 14,
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fontFamily: "monospace"
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})
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return {objects: {binary: binary, disassembled: disassembled}}
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},
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renderEach: function() {
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// Instruction memory is constant, so just create it once.
|
|
let reset = this.svSigRef(`L0_reset_a0`);
|
|
let pc = this.svSigRef(`L0_pc_a0`) == null ? this.svSigRef(`sticky_zero`) : this.svSigRef(`L0_pc_a0`);
|
|
let rd_viz = !reset.asBool() && (pc.asInt() >> 2) == this.getIndex();
|
|
if (!global.instr_mem_drawn) {
|
|
global.instr_mem_drawn = [];
|
|
}
|
|
if (!global.instr_mem_drawn[this.getIndex()]) {
|
|
global.instr_mem_drawn[this.getIndex()] = true
|
|
let binary_str = '$instr'.asBinaryStr(NaN)
|
|
let disassembled_str = '$instr_str'.asString()
|
|
disassembled_str = disassembled_str.slice(0, -5)
|
|
//debugger
|
|
this.getInitObject("binary").setText(binary_str)
|
|
this.getInitObject("disassembled").setText(disassembled_str)
|
|
}
|
|
this.getInitObject("disassembled").set({textBackgroundColor: rd_viz ? "#b0ffff" : "white"})
|
|
}
|
|
|
|
/xreg[31:0]
|
|
\viz_alpha
|
|
initEach: function() {
|
|
return {} // {objects: {reg: reg}};
|
|
},
|
|
renderEach: function() {
|
|
siggen = (name) => this.svSigRef(`${name}`) == null ? this.svSigRef(`sticky_zero`) : this.svSigRef(`${name}`);
|
|
let rf_rd_en1 = siggen(`RfViz_viz_rf_rd_en1_a0`);
|
|
let rf_rd_index1 = siggen(`RfViz_viz_rf_rd_index1_a0`);
|
|
let rf_rd_en2 = siggen(`RfViz_viz_rf_rd_en1_a0`);
|
|
let rf_rd_index2 = siggen(`RfViz_viz_rf_rd_index2_a0`);
|
|
let rf_wr_index = siggen(`RfViz_viz_rf_wr_index_a0`);
|
|
let wr = siggen(`L1_Xreg[${this.getIndex()}].L1_wr_a0`);
|
|
let value = siggen(`Xreg_value_a0(${this.getIndex()})`);
|
|
|
|
let rd = (rf_rd_en1.asBool(false) && rf_rd_index1.asInt() == this.getIndex()) ||
|
|
(rf_rd_en2.asBool(false) && rf_rd_index2.asInt() == this.getIndex());
|
|
|
|
let mod = wr.asBool(false);
|
|
let wr_color = mod && rf_wr_index.asInt() == this.getIndex();
|
|
let reg = parseInt(this.getIndex());
|
|
let regIdent = reg.toString().padEnd(2, " ");
|
|
let newValStr = regIdent + ": ";
|
|
let reg_str = new fabric.Text(regIdent + ": " + value.asInt(NaN).toString(), {
|
|
top: 18 * this.getIndex() - 40,
|
|
left: 316,
|
|
fontSize: 14,
|
|
fill: mod ? "blue" : "black",
|
|
fontWeight: mod ? 800 : 400,
|
|
fontFamily: "monospace",
|
|
textBackgroundColor: rd ? "#b0ffff" : wr_color ? "#ffef87" : null
|
|
})
|
|
if (mod) {
|
|
setTimeout(() => {
|
|
console.log(`Reg ${this.getIndex()} written with: ${newValStr}.`)
|
|
reg_str.set({text: newValStr, dirty: true})
|
|
this.global.canvas.renderAll()
|
|
}, 1500)
|
|
}
|
|
return {objects: [reg_str]}
|
|
}
|
|
|
|
/dmem[31:0]
|
|
\viz_alpha
|
|
initEach: function() {
|
|
return {} // {objects: {reg: reg}};
|
|
},
|
|
renderEach: function() {
|
|
siggen = (name) => this.svSigRef(`${name}`) == null ? this.svSigRef(`sticky_zero`) : this.svSigRef(`${name}`);
|
|
|
|
let dmem_rd_en = siggen(`DmemViz_viz_dmem_rd_en_a0`);
|
|
let dmem_rd_index = siggen(`DmemViz_viz_dmem_rd_index_a0`);
|
|
let dmem_wr_index = siggen(`DmemViz_viz_dmem_wr_index_a0`);
|
|
|
|
let wr = siggen(`L1_Dmem[${this.getIndex()}].L1_wr_a0`);
|
|
let value = siggen(`Dmem_value_a0(${this.getIndex()})`);
|
|
|
|
let rd = dmem_rd_en.asBool() && dmem_rd_index.asInt() == this.getIndex();
|
|
let mod = wr.asBool(false);
|
|
let wr_color = mod && dmem_wr_index.asInt() == this.getIndex();
|
|
let reg = parseInt(this.getIndex());
|
|
let regIdent = reg.toString().padEnd(2, " ");
|
|
let newValStr = regIdent + ": ";
|
|
let dmem_str = new fabric.Text(regIdent + ": " + value.asInt(NaN).toString(), {
|
|
top: 18 * this.getIndex() - 40,
|
|
left: 480,
|
|
fontSize: 14,
|
|
fill: mod ? "blue" : "black",
|
|
fontWeight: mod ? 800 : 400,
|
|
fontFamily: "monospace",
|
|
textBackgroundColor: rd ? "#b0ffff" : wr_color ? "#ffef87" : null
|
|
})
|
|
if (mod) {
|
|
setTimeout(() => {
|
|
console.log(`Reg ${this.getIndex()} written with: ${newValStr}.`)
|
|
dmem_str.set({text: newValStr, dirty: true})
|
|
this.global.canvas.renderAll()
|
|
}, 1500)
|
|
}
|
|
return {objects: [dmem_str]}
|
|
}
|
|
'])
|
|
|
|
|
|
\SV
|
|
m4_makerchip_module // (Expanded in Nav-TLV pane.)
|
|
|
|
\TLV
|
|
|
|
// /====================\
|
|
// | Sum 1 to 9 Program |
|
|
// \====================/
|
|
//
|
|
// Program for MYTH Workshop to test RV32I
|
|
// Add 1,2,3,...,9 (in that order).
|
|
//
|
|
// Regs:
|
|
// r10 (a0): In: 0, Out: final sum
|
|
// r12 (a2): 10
|
|
// r13 (a3): 1..10
|
|
// r14 (a4): Sum
|
|
//
|
|
// External to function:
|
|
m4_asm(ADD, r10, r0, r0) // Initialize r10 (a0) to 0.
|
|
// Function:
|
|
m4_asm(ADD, r14, r10, r0) // Initialize sum register a4 with 0x0
|
|
m4_asm(ADDI, r12, r10, 1010) // Store count of 10 in register a2.
|
|
m4_asm(ADD, r13, r10, r0) // Initialize intermediate sum register a3 with 0
|
|
// Loop:
|
|
m4_asm(ADD, r14, r13, r14) // Incremental addition
|
|
m4_asm(ADDI, r13, r13, 1) // Increment intermediate register by 1
|
|
m4_asm(BLT, r13, r12, 1111111111000) // If a3 is less than a2, branch to label named <loop>
|
|
m4_asm(ADD, r10, r14, r0) // Store final result to register a0 so that it can be read by main program
|
|
m4_asm(ADDI, r1, r0, 101)
|
|
m4_asm(ORI, r6, r0, 0)
|
|
m4_asm(SW, r6, r1, 0)
|
|
m4_asm(LW, r4, r6, 0)
|
|
// Optional:
|
|
m4_asm(JAL, r7, 11111111111111101000) // Done. Jump to itself (infinite loop). (Up to 20-bit signed immediate plus implicit 0 bit (unlike JALR) provides byte address; last immediate bit should also be 0)
|
|
|
|
m4_define_hier(['M4_IMEM'], M4_NUM_INSTRS)
|
|
m4+fill_imem()
|
|
|
|
//|cpu
|
|
//1 - PC
|
|
//@1
|
|
$reset = *reset;
|
|
$next_pc[31:0] = $reset ? '0 :
|
|
$taken_br ? $br_tgt_pc : //9
|
|
$is_jal ? $br_tgt_pc : // 13
|
|
$is_jalr ? $jalr_tgt_pc : // 13
|
|
$pc + 32'd4 ;
|
|
$pc[31:0] = >>1$next_pc;
|
|
|
|
//2 - IMEM - Read
|
|
//@1
|
|
`READONLY_MEM($pc, $$instr[31:0])
|
|
|
|
//3 - Decode Logic - RISBUJ
|
|
$is_i_instr = $instr[6:2] ==? 5'b0000x ||
|
|
$instr[6:2] ==? 5'b001x0 ||
|
|
$instr[6:2] ==? 5'b11001 ;
|
|
|
|
$is_r_instr = $instr[6:2] ==? 5'b01011 ||
|
|
$instr[6:2] ==? 5'b011x0 ||
|
|
$instr[6:2] ==? 5'b10100 ;
|
|
|
|
$is_s_instr = $instr[6:2] ==? 5'b0100x;
|
|
|
|
$is_b_instr = $instr[6:2] ==? 5'b11000;
|
|
|
|
$is_j_instr = $instr[6:2] ==? 5'b11011;
|
|
|
|
$is_u_instr = $instr[6:2] ==? 5'b0x101;
|
|
|
|
//4 - Instr Fields
|
|
$funct7[6:0] = $instr[31:25];
|
|
$funct3[2:0] = $instr[14:12];
|
|
$rs1[4:0] = $instr[19:15];
|
|
$rs2[4:0] = $instr[24:20];
|
|
$rd[4:0] = $instr[11:7];
|
|
$opcode[6:0] = $instr[6:0];
|
|
`BOGUS_USE($funct7 $funct3 $rs1 $rs2 $rd $opcode)
|
|
|
|
$funct7_valid = $is_r_instr;
|
|
$funct3_valid = $is_r_instr || $is_i_instr || $is_s_instr || $is_b_instr;
|
|
$rs1_valid = $is_r_instr || $is_i_instr || $is_s_instr || $is_b_instr;
|
|
$rs2_valid = $is_r_instr || $is_s_instr || $is_b_instr ;
|
|
$rd_valid = $is_r_instr || $is_i_instr || $is_u_instr || $is_j_instr;
|
|
$imm_valid = $is_i_instr || $is_s_instr || $is_b_instr || $is_u_instr || $is_j_instr;
|
|
`BOGUS_USE($funct7_valid $funct3_valid $rs1_valid $rs2_valid $rd_valid $imm_valid)
|
|
|
|
//5 - Imm
|
|
$imm[31:0] = $is_i_instr ? {{21{$instr[31]}}, $instr[30:20]} :
|
|
$is_s_instr ? {{21{$instr[31]}}, $instr[30:25], $instr[11:7]} :
|
|
$is_b_instr ? {{20{$instr[31]}}, $instr[7], $instr[30:25], $instr[11:8], 1'b0} :
|
|
$is_u_instr ? {$instr[31:12], 12'b0} :
|
|
$is_j_instr ? {{12{$instr[31]}}, $instr[19:12], $instr[20], $instr[30:21], 1'b0} :
|
|
32'b0 ;
|
|
`BOGUS_USE($imm)
|
|
|
|
//6 - Decode Instr Name
|
|
$dec_bits[10:0] = {$funct7[5], $funct3, $opcode};
|
|
$is_beq = $dec_bits ==? 11'bx_000_1100011;
|
|
$is_bne = $dec_bits ==? 11'bx_001_1100011;
|
|
$is_blt = $dec_bits ==? 11'bx_100_1100011;
|
|
$is_bge = $dec_bits ==? 11'bx_101_1100011;
|
|
$is_bltu = $dec_bits ==? 11'bx_110_1100011;
|
|
$is_bgeu = $dec_bits ==? 11'bx_111_1100011;
|
|
|
|
$is_addi = $dec_bits ==? 11'bx_000_0010011;
|
|
$is_add = $dec_bits ==? 11'b0_000_0110011;
|
|
`BOGUS_USE($is_beq $is_bne $is_blt $is_bge $is_bltu $is_bgeu $is_addi $is_add)
|
|
|
|
//7 - RF Read
|
|
//$rf_rd_en1 = $rs1_valid;
|
|
//$rf_rd_index1[4:0] = $rs1;
|
|
//$src1_value[31:0] = $rf_rd_data1;
|
|
|
|
//$rf_rd_en2 = $rs2_valid;
|
|
//$rf_rd_index2[4:0] = $rs2;
|
|
//$src2_value[31:0] = $rf_rd_data2;
|
|
|
|
//`BOGUS_USE($src1_value $src2_value)
|
|
|
|
//8 - ALU
|
|
//$result[31:0] = $is_addi ? $src1_value + $imm :
|
|
// $is_add ? $src1_value + $src2_value :
|
|
// 32'bx;
|
|
//$rf_wr_en = $rd_valid && ($rd != 5'b0);
|
|
//$rf_wr_index[4:0] = $rd;
|
|
//$rf_wr_data[31:0] = $is_load ? $ld_data : $result; // 14
|
|
|
|
//9- Branch
|
|
$taken_br = $is_beq ? ($src1_value == $src2_value) :
|
|
$is_bne ? ($src1_value != $src2_value) :
|
|
$is_blt ? (($src1_value < $src2_value) ^ ($src1_value[31] != $src2_value[31])) :
|
|
$is_bge ? (($src1_value >= $src2_value) ^ ($src1_value[31] != $src2_value[31])) :
|
|
$is_bltu ? ($src1_value < $src2_value) :
|
|
$is_bgeu ? ($src1_value >= $src2_value) :
|
|
1'b0;
|
|
|
|
$br_tgt_pc[31:0] = $pc + $imm;
|
|
|
|
// 10 - Stop
|
|
//*passed = |cpu/xreg[10]>>5$value == (1+2+3+4+5+6+7+8+9);
|
|
|
|
//11
|
|
$is_lui = $dec_bits ==? 11'bx_xxx_0110111 ;
|
|
$is_auipc = $dec_bits ==? 11'bx_xxx_0010111 ;
|
|
$is_jal = $dec_bits ==? 11'bx_xxx_1101111 ;
|
|
$is_jalr = $dec_bits ==? 11'bx_000_1100111 ;
|
|
|
|
$is_load = $opcode == 7'b0000011 ;
|
|
|
|
$is_sb = $dec_bits ==? 11'bx_000_0100011 ;
|
|
$is_sh = $dec_bits ==? 11'bx_001_0100011 ;
|
|
$is_sw = $dec_bits ==? 11'bx_010_0100011 ;
|
|
|
|
$is_slti = $dec_bits ==? 11'bx_010_0010011 ;
|
|
|
|
//12
|
|
$result[31:0] = $is_addi || $is_load || $is_s_instr ? $src1_value + $imm : // 14
|
|
$is_add ? $src1_value + $src2_value :
|
|
$is_lui ? {$imm[31:12], 12'b0} :
|
|
$is_auipc ? $pc + $imm :
|
|
$is_jal ? $pc + 32'd4 :
|
|
$is_jalr ? $pc + 32'd4 :
|
|
$is_slti ? (($src1_value[31] == $imm[31]) ? $src1_value < $imm : {31'b0, $src1_value[31]}) :
|
|
32'bx;
|
|
//13
|
|
$is_jump = $is_jal || $is_jalr;
|
|
$jalr_tgt_pc[31:0] = $src1_value + $imm;
|
|
|
|
|
|
//14
|
|
//$dmem_wr_en = $is_s_instr;
|
|
//$dmem_rd_en1 = $is_load;
|
|
//$dmem_rd_index1[4:0] = $result[6:2];
|
|
//$dmem_wr_index[4:0] = $result[6:2];
|
|
//$dmem_wr_data[31:0] = $src2_value;
|
|
//$ld_data[31:0] = $dmem_rd_data1;
|
|
|
|
//*passed = |cpu/xreg[4]>>5$value == 0;
|
|
// YOUR CODE HERE
|
|
// ...
|
|
|
|
// Note: Because of the magic we are using for visualisation, if visualisation is enabled below,
|
|
// be sure to avoid having unassigned signals (which you might be using for random inputs)
|
|
// other than those specifically expected in the labs. You'll get strange errors for these.
|
|
|
|
|
|
// Assert these to end simula/toption (before Makerchip cycle limit).
|
|
*passed = *cyc_cnt > 60;
|
|
*failed = 1'b0;
|
|
|
|
// Macro instantiations for:
|
|
// o instruction memory
|
|
// o register file
|
|
// o data memory
|
|
// o CPU visualization
|
|
//|cpu
|
|
m4+rf(32, 32, $reset, $rd_valid && ($rd != 5'b0), $rd, $is_load ? $ld_data : $result, $rs1_valid, $rs1, $$src1_value[31:0], $rs2_valid, $rs2, $$src2_value[31:0])
|
|
//m4+rf(32, 32, $reset, $rd_valid && ($rd != 5'b0), $rd, $result, $rs1_valid, $rs1, $$src1_value[31:0], $rs2_valid, $rs2, $$src2_value[31:0])
|
|
m4+dmem(32, 32, $reset, $is_s_instr, $result[6:2], $src2_value, $is_load, $result[6:2], $$ld_data[31:0])
|
|
|
|
m4+cpu_viz() // For visualisation, argument should be at least equal to the last stage of CPU logic
|
|
// @4 would work for all labs
|
|
\SV
|
|
endmodule
|