391 lines
14 KiB
C++
391 lines
14 KiB
C++
/*
|
|
* Copyright (c) 2020 Raspberry Pi (Trading) Ltd.
|
|
*
|
|
* SPDX-License-Identifier: BSD-3-Clause
|
|
*/
|
|
|
|
#include <cstdio>
|
|
#include <iterator>
|
|
#include "pio_assembler.h"
|
|
#include "parser.hpp"
|
|
|
|
#ifdef _MSC_VER
|
|
#pragma warning(disable : 4996) // fopen
|
|
#endif
|
|
|
|
using syntax_error = yy::parser::syntax_error;
|
|
|
|
std::string output_format::default_name = "c-sdk";
|
|
|
|
pio_assembler::pio_assembler() {
|
|
}
|
|
|
|
int pio_assembler::generate(std::shared_ptr<output_format> _format, const std::string &_source,
|
|
const std::string &_dest, const std::vector<std::string> &_options) {
|
|
format = _format;
|
|
source = _source;
|
|
dest = _dest;
|
|
options = _options;
|
|
location.initialize(&source);
|
|
scan_begin();
|
|
yy::parser parse(*this);
|
|
// parse.set_debug_level(false);
|
|
int res = parse();
|
|
scan_end();
|
|
return res;
|
|
}
|
|
|
|
void program::add_instruction(std::shared_ptr<instruction> inst) {
|
|
uint limit = MAX_INSTRUCTIONS;
|
|
if (instructions.size() >= limit) {
|
|
// todo take offset into account
|
|
std::stringstream msg;
|
|
msg << "program instruction limit of " << limit << " instruction(s) exceeded";
|
|
throw syntax_error(inst->location, msg.str());
|
|
}
|
|
if (!sideset_opt && !inst->sideset) {
|
|
std::stringstream msg;
|
|
msg << "instruction requires 'side' to specify side set value for the instruction because non optional sideset was specified for the program at " << sideset.location;
|
|
throw syntax_error(inst->location, msg.str());
|
|
}
|
|
instructions.push_back(inst);
|
|
}
|
|
|
|
using syntax_error = yy::parser::syntax_error;
|
|
|
|
void program::add_symbol(std::shared_ptr<symbol> symbol) {
|
|
const auto &existing = pioasm->get_symbol(symbol->name, this);
|
|
if (existing) {
|
|
std::stringstream msg;
|
|
if (symbol->is_label != existing->is_label) {
|
|
msg << "'" << symbol->name << "' was already defined as a " << (existing->is_label ? "label" : "value")
|
|
<< " at " << existing->location;
|
|
} else if (symbol->is_label) {
|
|
msg << "label '" << symbol->name << "' was already defined at " << existing->location;
|
|
} else {
|
|
msg << "'" << symbol->name << "' was already defined at " << existing->location;
|
|
}
|
|
throw syntax_error(symbol->location, msg.str());
|
|
}
|
|
symbols.insert(std::pair<std::string, std::shared_ptr<::symbol>>(symbol->name, symbol));
|
|
ordered_symbols.push_back(symbol);
|
|
}
|
|
|
|
int resolvable::resolve(const program &program) {
|
|
return resolve(program.pioasm, &program);
|
|
}
|
|
|
|
int unary_operation::resolve(pio_assembler *pioasm, const program *program, const resolvable &scope) {
|
|
int value = arg->resolve(pioasm, program, scope);
|
|
switch (op) {
|
|
case negate:
|
|
return -value;
|
|
case reverse: {
|
|
// slow is fine
|
|
uint result = 0;
|
|
for (uint i = 0; i < 32; i++) {
|
|
result <<= 1u;
|
|
if (value & 1u) {
|
|
result |= 1u;
|
|
}
|
|
value >>= 1u;
|
|
}
|
|
return result;
|
|
}
|
|
default:
|
|
throw syntax_error(location, "internal error");
|
|
}
|
|
}
|
|
|
|
int binary_operation::resolve(pio_assembler *pioasm, const program *program, const resolvable &scope) {
|
|
int lvalue = left->resolve(pioasm, program, scope);
|
|
int rvalue = right->resolve(pioasm, program, scope);
|
|
switch (op) {
|
|
case add:
|
|
return lvalue + rvalue;
|
|
case subtract:
|
|
return lvalue - rvalue;
|
|
case multiply:
|
|
return lvalue * rvalue;
|
|
case divide:
|
|
return lvalue / rvalue;
|
|
case and_:
|
|
return lvalue & rvalue;
|
|
case or_:
|
|
return lvalue | rvalue;
|
|
case xor_:
|
|
return lvalue ^ rvalue;
|
|
default:
|
|
throw syntax_error(location, "internal error");
|
|
}
|
|
}
|
|
|
|
void program::set_wrap(const yy::location &l) {
|
|
if (wrap) {
|
|
std::stringstream msg;
|
|
msg << ".wrap was already specified at " << wrap->location;
|
|
throw syntax_error(l, msg.str());
|
|
}
|
|
if (instructions.empty()) {
|
|
throw syntax_error(l, ".wrap cannot be pleaced before the first program instruction");
|
|
}
|
|
wrap = resolvable_int(l, instructions.size() - 1);
|
|
}
|
|
|
|
void program::set_wrap_target(const yy::location &l) {
|
|
if (wrap_target) {
|
|
std::stringstream msg;
|
|
msg << ".wrap_target was already specified at " << wrap_target->location;
|
|
throw syntax_error(l, msg.str());
|
|
}
|
|
wrap_target = resolvable_int(l, instructions.size());
|
|
}
|
|
|
|
void program::add_code_block(const code_block &block) {
|
|
code_blocks[block.lang].push_back(block);
|
|
}
|
|
|
|
void program::add_lang_opt(std::string lang, std::string name, std::string value) {
|
|
lang_opts[lang].emplace_back(name, value);
|
|
}
|
|
|
|
void program::finalize() {
|
|
if (sideset.value) {
|
|
int bits = sideset.value->resolve(*this);
|
|
if (bits < 0) {
|
|
throw syntax_error(sideset.value->location, "number of side set bits must be positive");
|
|
}
|
|
sideset_max = (1u << bits) - 1;
|
|
if (sideset_opt) bits++;
|
|
sideset_bits_including_opt = bits;
|
|
if (bits > 5) {
|
|
if (sideset_opt)
|
|
throw syntax_error(sideset.value->location, "maximum number of side set bits with optional is 4");
|
|
else
|
|
throw syntax_error(sideset.value->location, "maximum number of side set bits is 5");
|
|
}
|
|
delay_max = (1u << (5 - bits)) - 1;
|
|
} else {
|
|
sideset_max = 0;
|
|
delay_max = 31;
|
|
}
|
|
}
|
|
|
|
int name_ref::resolve(pio_assembler *pioasm, const program *program, const resolvable &scope) {
|
|
auto symbol = pioasm->get_symbol(name, program);
|
|
if (symbol) {
|
|
if (symbol->resolve_started) {
|
|
std::stringstream msg;
|
|
msg << "circular dependency in definition of '" << name << "'; detected at " << location << ")";
|
|
throw syntax_error(scope.location, msg.str());
|
|
}
|
|
try {
|
|
symbol->resolve_started++;
|
|
int rc = symbol->value->resolve(pioasm, program, scope);
|
|
symbol->resolve_started--;
|
|
return rc;
|
|
} catch (syntax_error &e) {
|
|
symbol->resolve_started--;
|
|
throw e;
|
|
}
|
|
} else {
|
|
std::stringstream msg;
|
|
msg << "undefined symbol '" << name << "'";
|
|
throw syntax_error(location, msg.str());
|
|
}
|
|
}
|
|
|
|
uint instruction::encode(const program &program) {
|
|
raw_encoding raw = raw_encode(program);
|
|
int _delay = delay->resolve(program);
|
|
if (_delay < 0) {
|
|
throw syntax_error(delay->location, "instruction delay must be positive");
|
|
}
|
|
if (_delay > program.delay_max) {
|
|
if (program.delay_max == 31) {
|
|
throw syntax_error(delay->location, "instruction delay must be <= 31");
|
|
} else {
|
|
std::stringstream msg;
|
|
msg << "the instruction delay limit is " << program.delay_max << " because of the side set specified at "
|
|
<< program.sideset.location;
|
|
throw syntax_error(delay->location, msg.str());
|
|
}
|
|
}
|
|
int _sideset = 0;
|
|
if (sideset) {
|
|
_sideset = sideset->resolve(program);
|
|
if (_sideset < 0) {
|
|
throw syntax_error(sideset->location, "side set value must be >=0");
|
|
}
|
|
if (_sideset > program.sideset_max) {
|
|
std::stringstream msg;
|
|
msg << "the maximum side set value is " << program.sideset_max << " based on the configuration specified at "
|
|
<< program.sideset.location;
|
|
throw syntax_error(sideset->location, msg.str());
|
|
}
|
|
_sideset <<= (5u - program.sideset_bits_including_opt);
|
|
if (program.sideset_opt) {
|
|
_sideset |= 0x10u;
|
|
}
|
|
}
|
|
return (((uint) raw.type) << 13u) | (((uint) _delay | (uint) _sideset) << 8u) | (raw.arg1 << 5u) | raw.arg2;
|
|
}
|
|
|
|
raw_encoding instruction::raw_encode(const program &program) {
|
|
throw syntax_error(location, "internal error");
|
|
}
|
|
|
|
uint instr_word::encode(const program &program) {
|
|
uint value = encoding->resolve(program);
|
|
if (value > 0xffffu) {
|
|
throw syntax_error(location, ".word value must be a positive 16 bit value");
|
|
}
|
|
return value;
|
|
}
|
|
|
|
raw_encoding instr_jmp::raw_encode(const program &program) {
|
|
int dest = target->resolve(program);
|
|
if (dest < 0) {
|
|
throw syntax_error(target->location, "jmp target address must be positive");
|
|
} else if (dest >= (int)program.instructions.size()) {
|
|
std::stringstream msg;
|
|
msg << "jmp target address " << dest << " is beyond the end of the program";
|
|
throw syntax_error(target->location, msg.str());
|
|
}
|
|
return {inst_type::jmp, (uint) cond, (uint) dest};
|
|
}
|
|
|
|
raw_encoding instr_in::raw_encode(const program &program) {
|
|
int v = value->resolve(program);
|
|
if (v < 1 || v > 32) {
|
|
throw syntax_error(value->location, "'in' bit count must be >= 1 and <= 32");
|
|
}
|
|
return {inst_type::in, (uint) src, (uint) v & 0x1fu};
|
|
}
|
|
|
|
raw_encoding instr_out::raw_encode(const program &program) {
|
|
int v = value->resolve(program);
|
|
if (v < 1 || v > 32) {
|
|
throw syntax_error(value->location, "'out' bit count must be >= 1 and <= 32");
|
|
}
|
|
return {inst_type::out, (uint) dest, (uint) v & 0x1fu};
|
|
}
|
|
|
|
raw_encoding instr_set::raw_encode(const program &program) {
|
|
int v = value->resolve(program);
|
|
if (v < 0 || v > 31) {
|
|
throw syntax_error(value->location, "'set' bit count must be >= 0 and <= 31");
|
|
}
|
|
return {inst_type::set, (uint) dest, (uint) v};
|
|
}
|
|
|
|
raw_encoding instr_wait::raw_encode(const program &program) {
|
|
uint pol = polarity->resolve(program);
|
|
if (pol > 1) {
|
|
throw syntax_error(polarity->location, "'wait' polarity must be 0 or 1");
|
|
}
|
|
uint arg2 = source->param->resolve(program);
|
|
switch (source->target) {
|
|
case wait_source::irq:
|
|
if (arg2 > 7) throw syntax_error(source->param->location, "irq number must be must be >= 0 and <= 7");
|
|
break;
|
|
case wait_source::gpio:
|
|
if (arg2 > 31)
|
|
throw syntax_error(source->param->location, "absolute GPIO number must be must be >= 0 and <= 31");
|
|
break;
|
|
case wait_source::pin:
|
|
if (arg2 > 31) throw syntax_error(polarity->location, "pin number must be must be >= 0 and <= 31");
|
|
break;
|
|
}
|
|
return {inst_type::wait, (pol << 2u) | (uint) source->target, arg2 | (source->flag ? 0x10u : 0u)};
|
|
}
|
|
|
|
raw_encoding instr_irq::raw_encode(const program &program) {
|
|
uint arg2 = num->resolve(program);
|
|
if (arg2 > 7) throw syntax_error(num->location, "irq number must be must be >= 0 and <= 7");
|
|
if (relative) arg2 |= 0x10u;
|
|
return {inst_type::irq, (uint)modifiers, arg2};
|
|
}
|
|
|
|
std::vector<compiled_source::symbol> pio_assembler::public_symbols(program &program) {
|
|
std::vector<std::shared_ptr<symbol>> public_symbols;
|
|
std::remove_copy_if(program.ordered_symbols.begin(), program.ordered_symbols.end(),
|
|
std::inserter(public_symbols, public_symbols.end()),
|
|
[](const std::shared_ptr<symbol> &s) { return !s->is_public; });
|
|
|
|
std::vector<compiled_source::symbol> rc;
|
|
std::transform(public_symbols.begin(), public_symbols.end(), std::back_inserter(rc),
|
|
[&](const std::shared_ptr<symbol> &s) {
|
|
return compiled_source::symbol(s->name, s->value->resolve(program), s->is_label);
|
|
});
|
|
return rc;
|
|
}
|
|
|
|
int pio_assembler::write_output() {
|
|
std::set<std::string> known_output_formats;
|
|
std::transform(output_format::all().begin(), output_format::all().end(),
|
|
std::inserter(known_output_formats, known_output_formats.begin()),
|
|
[&](std::shared_ptr<output_format> &f) {
|
|
return f->name;
|
|
});
|
|
|
|
compiled_source source;
|
|
source.global_symbols = public_symbols(get_dummy_global_program());
|
|
for (auto &program : programs) {
|
|
program.finalize();
|
|
source.programs.emplace_back(compiled_source::program(program.name));
|
|
auto &cprogram = source.programs[source.programs.size() - 1];
|
|
cprogram = compiled_source::program(program.name);
|
|
|
|
// encode the instructions
|
|
std::transform(program.instructions.begin(), program.instructions.end(),
|
|
std::back_inserter(cprogram.instructions), [&](std::shared_ptr<instruction> &inst) {
|
|
return inst->encode(program);
|
|
});
|
|
|
|
for (const auto &e : program.code_blocks) {
|
|
bool ok = false;
|
|
for(const auto &o : known_output_formats) {
|
|
if (o == e.first || 0 == e.first.find(o+"-")) {
|
|
ok = true;
|
|
break;
|
|
}
|
|
}
|
|
if (!ok) {
|
|
std::cerr << e.second[0].location << ": warning, unknown code block output type '" << e.first << "'\n";
|
|
known_output_formats.insert(e.first);
|
|
}
|
|
}
|
|
|
|
if (program.wrap) cprogram.wrap = program.wrap->resolve(program); else cprogram.wrap = std::max((int)program.instructions.size() - 1, 0);
|
|
if (program.wrap_target) cprogram.wrap_target = program.wrap_target->resolve(program); else cprogram.wrap_target = 0;
|
|
if (program.origin.value) cprogram.origin = program.origin.value->resolve(program);
|
|
if (program.sideset.value) {
|
|
cprogram.sideset_bits_including_opt = program.sideset_bits_including_opt;
|
|
cprogram.sideset_opt = program.sideset_opt;
|
|
cprogram.sideset_pindirs = program.sideset_pindirs;
|
|
}
|
|
std::transform(program.code_blocks.begin(), program.code_blocks.end(), std::inserter(cprogram.code_blocks, cprogram.code_blocks.begin()), [](const std::pair<std::string, std::vector<code_block>>&e) {
|
|
std::vector<std::string> blocks;
|
|
std::transform(e.second.begin(), e.second.end(), std::back_inserter(blocks), [&](const code_block& block) {
|
|
return block.contents;
|
|
});
|
|
return std::pair<std::string, std::vector<std::string>>(e.first, blocks);
|
|
});
|
|
cprogram.lang_opts = program.lang_opts;
|
|
cprogram.symbols = public_symbols(program);
|
|
}
|
|
if (programs.empty()) {
|
|
std::cout << "warning: input contained no programs" << std::endl;
|
|
}
|
|
return format->output(dest, options, source);
|
|
}
|
|
|
|
FILE *output_format::open_single_output(std::string destination) {
|
|
FILE *out = destination == "-" ? stdout : fopen(destination.c_str(), "w");
|
|
if (!out) {
|
|
std::cerr << "Can't open output file '" << destination << "'" << std::endl;
|
|
}
|
|
return out;
|
|
}
|