324 lines
12 KiB
C++
324 lines
12 KiB
C++
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/*
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* Copyright (c) 2020 Raspberry Pi (Trading) Ltd.
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*
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* SPDX-License-Identifier: BSD-3-Clause
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*/
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#include <array>
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#include <algorithm>
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#include <sstream>
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#include <iomanip>
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#include <iostream>
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#include "output_format.h"
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#include "pio_disassembler.h"
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struct python_output : public output_format {
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struct factory {
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factory() {
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output_format::add(new python_output());
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}
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};
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python_output() : output_format("python") {}
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std::string get_description() override {
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return "Python file suitable for use with MicroPython";
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}
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void output_symbols(FILE *out, std::string prefix, const std::vector<compiled_source::symbol> &symbols) {
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int count = 0;
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for (const auto &s : symbols) {
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if (!s.is_label) {
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fprintf(out, "%s%s = %d\n", prefix.c_str(), s.name.c_str(), s.value);
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count++;
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}
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}
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if (count) {
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fprintf(out, "\n");
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count = 0;
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}
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for (const auto &s : symbols) {
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if (s.is_label) {
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fprintf(out, "%soffset_%s = %d\n", prefix.c_str(), s.name.c_str(), s.value);
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count++;
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}
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}
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if (count) {
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fprintf(out, "\n");
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}
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}
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void header(FILE *out, std::string msg) {
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std::string dashes = std::string(msg.length(), '-');
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fprintf(out, "# %s #\n", dashes.c_str());
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fprintf(out, "# %s #\n", msg.c_str());
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fprintf(out, "# %s #\n", dashes.c_str());
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fprintf(out, "\n");
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}
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int output(std::string destination, std::vector<std::string> output_options,
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const compiled_source &source) override {
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FILE *out = open_single_output(destination);
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if (!out) return 1;
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header(out, "This file is autogenerated by pioasm; do not edit!");
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fprintf(out, "import rp2\n");
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fprintf(out, "from machine import Pin");
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fprintf(out, "\n");
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output_symbols(out, "", source.global_symbols);
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for (const auto &program : source.programs) {
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header(out, program.name);
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std::string prefix = program.name + "_";
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output_symbols(out, prefix, program.symbols);
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int param_count = 0;
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auto write_opt = [&] (std::string name, std::string value) {
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if (param_count++) {
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fprintf(out, ", ");
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}
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fprintf(out, "%s=%s", name.c_str(), value.c_str());
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};
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fprintf(out, "@rp2.asm_pio(");
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for(const auto &p : program.lang_opts) {
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if (p.first.size() >= name.size() && p.first.compare(0, name.size(), name) == 0) {
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for (const auto &p2 : p.second) {
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write_opt(p2.first, p2.second);
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}
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}
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}
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fprintf(out, ")\n");
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fprintf(out, "def %s():\n", program.name.c_str());
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std::map<uint, std::string> jmp_labels;
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// for now just use numeric labels
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for (int i = 0; i < (int)program.instructions.size(); i++) {
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const auto &inst = program.instructions[i];
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if (!(inst >> 13u)) {
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// a jump
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uint target = inst &0x1fu;
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jmp_labels.insert(std::pair<uint,std::string>(target, std::to_string(target)));
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}
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}
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for (uint i = 0; i < (int)program.instructions.size(); i++) {
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const auto &inst = program.instructions[i];
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if (i == program.wrap_target) {
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fprintf(out, " wrap_target()\n");
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}
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auto it = jmp_labels.find(i);
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if (it != jmp_labels.end()) {
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fprintf(out, " label(\"%s\")\n", it->second.c_str());
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}
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fprintf(out, " %s # %d\n", disassemble(jmp_labels, inst, program.sideset_bits_including_opt.get(), program.sideset_opt).c_str(), i);
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if (i == program.wrap) {
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fprintf(out, " wrap()\n");
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}
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}
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fprintf(out, "\n");
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/*
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fprintf(out, "static inline pio_sm_config %sprogram_default_config(uint offset) {\n", prefix.c_str());
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fprintf(out, " pio_sm_config c = pio_sm_default_config();\n");
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fprintf(out, " sm_config_wrap(&c, offset + %swrap_target, offset + %swrap);\n", prefix.c_str(),
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prefix.c_str());
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if (program.sideset_bits_including_opt.is_specified()) {
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fprintf(out, " sm_config_sideset(&c, %d, %s, %s);\n", program.sideset_bits_including_opt.get(),
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program.sideset_opt ? "true" : "false",
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program.sideset_pindirs ? "true" : "false");
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}
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fprintf(out, " return c;\n");
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fprintf(out, "}\n");
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*/
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// todo maybe have some code blocks inside or outside here?
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for(const auto& o : program.code_blocks) {
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fprintf(out, "\n");
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if (o.first == name) {
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for(const auto &contents : o.second) {
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fprintf(out, "%s", contents.c_str());
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fprintf(out, "\n");
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}
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}
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}
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fprintf(out, "\n");
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}
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if (out != stdout) { fclose(out); }
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return 0;
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}
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static std::string disassemble(const std::map<uint, std::string>& jmp_labels, uint16_t inst, uint sideset_bits_including_opt, bool sideset_opt) {
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std::stringstream ss;
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uint major = inst >> 13u;
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uint arg1 = ((uint) inst >> 5u) & 0x7u;
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uint arg2 = inst & 0x1fu;
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std::string op_string;
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auto op = [&](const std::string &s) {
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op_string = s;
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};
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auto op_guts = [&](const std::string &s) {
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ss << std::left << std::setw(24) << (op_string + "(" + s + ")");
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};
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bool invalid = false;
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switch (major) {
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case 0b000: {
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static std::array<std::string, 8> conditions{"", "not_x", "x_dec", "not_y", "y_dec", "x_not_y", "pin",
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"not_osre"};
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op("jmp");
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auto it = jmp_labels.find(arg2);
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std::string label = "?";
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if (it != jmp_labels.end()) {
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label = it->second;
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}
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if (arg1)
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op_guts(conditions[arg1] + ", \"" + label +"\"");
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else
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op_guts("\"" + label + "\"");
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break;
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}
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case 0b001: {
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uint source = arg1 & 3u;
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std::string guts;
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switch (source) {
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case 0b00:
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guts = "gpio, " + std::to_string(arg2);
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break;
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case 0b01:
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guts = "pin, " + std::to_string(arg2);
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break;
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case 0b10:
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if (arg2 & 0x8u) {
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invalid = true;
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} else {
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guts = "irq, " + std::to_string(arg2 & 7u);
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if (arg2 & 0x10u) {
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guts += " rel";
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}
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}
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break;
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}
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if (!invalid) {
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guts = ((arg1 & 4u) ? "1 " : "0 ") + guts;
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op("wait");
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op_guts(guts);
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}
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break;
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}
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case 0b010: {
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static std::array<std::string, 8> sources { "pins", "x", "y", "null", "", "status", "isr", "osr"};
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std::string source = sources[arg1];
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if (source.empty()) {
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invalid = true;
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} else {
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op("in");
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op_guts(source + ", " + std::to_string(arg2 ? arg2 : 32));
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}
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break;
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}
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case 0b011: {
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static std::array<std::string, 8> dests { "pins", "x", "y", "null", "pindirs", "pc", "isr", "exec"};
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op("out");
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op_guts(dests[arg1] + ", " + std::to_string(arg2 ? arg2 : 32));
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break;
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}
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case 0b100: {
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if (arg2) {
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invalid = true;
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} else {
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std::string guts = "";
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if (arg1 & 4u) {
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op("pull");
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if (arg1 & 2u) guts = "ifempty";
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} else {
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op("push");
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if (arg1 & 2u) guts = "iffull";
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}
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guts += ", ";
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guts += ((arg1 & 0x1u) ? "block" : "noblock");
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op_guts(guts);
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}
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break;
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}
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case 0b101: {
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static std::array<std::string, 8> dests { "pins", "x", "y", "", "exec", "pc", "isr", "osr"};
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static std::array<std::string, 8> sources { "pins", "x", "y", "null", "", "status", "isr", "osr"};
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std::string dest = dests[arg1];
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std::string source = sources[arg2 & 7u];
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uint operation = arg2 >> 3u;
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if (source.empty() || dest.empty() || operation == 3) {
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invalid = true;
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}
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if (dest == source && (arg1 == 1 || arg2 == 2)) {
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op("nop");
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op_guts("");
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} else {
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op("mov");
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std::string guts = dest + ", ";
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if (operation == 1) {
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guts += "not ";
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} else if (operation == 2) {
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guts += "reverse ";
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}
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guts += source;
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op_guts(guts);
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}
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break;
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}
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case 0b110: {
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if ((arg1 & 0x4u) || (arg2 & 0x8u)) {
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invalid = true;
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} else {
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op("irq");
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std::string guts;
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if (arg1 & 0x2u) {
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guts += "clear ";
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} else if (arg1 & 0x1u) {
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guts += "wait ";
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} else {
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guts += "nowait ";
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}
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guts += std::to_string(arg2 & 7u);
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if (arg2 & 0x10u) {
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guts += " rel";
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}
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op_guts(guts);
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}
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break;
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}
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case 0b111: {
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static std::array<std::string, 8> dests{"pins", "x", "y", "", "pindirs", "", "", ""};
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std::string dest = dests[arg1];
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if (dest.empty()) {
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invalid = true;
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} else {
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op("set");
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op_guts(dests[arg1] + ", " + std::to_string(arg2));
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}
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break;
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}
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}
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if (invalid) {
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op("word");
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ss << std::hex;
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op_guts(std::to_string(inst));
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}
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uint delay = ((uint) inst >> 8u) & 0x1f;
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ss << std::left << std::setw(9);
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if (sideset_bits_including_opt && (!sideset_opt || (delay & 0x10u))) {
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ss << (".side("+ std::to_string((delay & (sideset_opt ? 0xfu : 0x1fu)) >> (5u - sideset_bits_including_opt))+")");
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} else {
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ss << "";
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}
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delay &= ((1u << (5 - sideset_bits_including_opt)) - 1u);
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ss << std::left << std::setw(4) << (delay ? ("[" + std::to_string(delay) + "]") : "");
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return ss.str();
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}
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};
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static python_output::factory creator;
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