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#include "../../include/bytecode/bytecode.h"
#include "../../include/std/mem.h"
#include "../../include/ssa/ssa.h"
#include "../../include/parser.h"
#include "../../include/compiler.h"
#include <assert.h>
#include <stdio.h> /* TODO: Remove this */
#include <stdlib.h>
#include <string.h>
#define throw(result) do { throw_debug_msg; longjmp(self->env, (result)); } while(0)
#define throw_if_error(result) \
do { \
int return_if_result; \
return_if_result = (result); \
if((return_if_result) != 0) \
throw(return_if_result); \
} while(0)
int bytecode_init(Bytecode *self, ScopedAllocator *allocator) {
return buffer_init(&self->instructions, allocator);
}
static CHECK_RESULT usize ssa_extract_form1(u8 *instruction_data, SsaInsForm1 *result) {
am_memcpy(&result->lhs, instruction_data, sizeof(result->lhs));
am_memcpy(&result->rhs, instruction_data + sizeof(result->lhs), sizeof(result->rhs));
return sizeof(result->lhs) + sizeof(result->rhs);
}
static CHECK_RESULT usize ssa_extract_form2(u8 *instruction_data, SsaInsForm2 *result) {
am_memcpy(&result->result, instruction_data, sizeof(result->result));
am_memcpy(&result->lhs, instruction_data + sizeof(result->result), sizeof(result->lhs));
am_memcpy(&result->rhs, instruction_data + sizeof(result->result) + sizeof(result->lhs), sizeof(result->rhs));
return sizeof(result->result) + sizeof(result->lhs) + sizeof(result->rhs);
}
static CHECK_RESULT usize ssa_extract_func_start(u8 *instruction_data, SsaInsFuncStart *result) {
am_memcpy(&result->func_index, instruction_data, sizeof(result->func_index));
am_memcpy(&result->num_args, instruction_data + sizeof(result->func_index), sizeof(result->num_args));
return sizeof(result->func_index) + sizeof(result->num_args);
}
static CHECK_RESULT usize ssa_extract_func_call(u8 *instruction_data, SsaInsFuncCall *result) {
am_memcpy(&result->result, instruction_data, sizeof(result->result));
am_memcpy(&result->func_decl, instruction_data + sizeof(result->result), sizeof(result->func_decl));
return sizeof(result->result) + sizeof(result->func_decl);
}
static void add_intermediates(BytecodeCompilerContext *self) {
Ssa *ssa;
Buffer *instructions;
SsaNumber *intermediate;
SsaNumber *intermediates_end;
ssa = self->parser->ssa;
instructions = &self->bytecode->instructions;
intermediate = buffer_begin(&ssa->intermediates);
intermediates_end = buffer_end(&ssa->intermediates);
throw_if_error(buffer_expand(instructions,
sizeof(u16) + (sizeof(u8) + sizeof(u64)) * ssa->intermediates.size));
throw_if_error(buffer_append(instructions, &ssa->intermediates.size, sizeof(u16)));
for(; intermediate != intermediates_end; ++intermediate) {
throw_if_error(buffer_append(instructions, &intermediate->type, sizeof(u8)));
throw_if_error(buffer_append(instructions, &intermediate->value.integer, sizeof(u64)));
}
}
#define NUM_MAX_REGS 256
static void add_instructions(BytecodeCompilerContext *self) {
Ssa *ssa;
u8 *instruction;
u8 *instructions_end;
SsaInsForm1 ssa_ins_form1;
SsaInsForm2 ssa_ins_form2;
SsaInsFuncStart ssa_ins_func_start;
SsaInsFuncCall ssa_ins_func_call;
FILE *file;
char *filename;
LhsExpr *reg_types[NUM_MAX_REGS]; /* TODO: Remove this. Encode this data in the register itself */
ssa = self->parser->ssa;
instruction = buffer_begin(&ssa->instructions);
instructions_end = buffer_end(&ssa->instructions);
/*#warning "dont forget to remove this" */
filename = malloc(self->parser->tokenizer.code_name.size + 3);
filename[0] = '\0';
strcat(filename, self->parser->tokenizer.code_name.data);
strcat(filename, ".z");
file = fopen(filename, "wb");
free(filename);
#ifdef DEBUG
am_memset(reg_types, 0, sizeof(reg_types));
#endif
fputs("typedef i64 signed long long;\n", file);
fputs("typedef f64 double;\n", file);
while(instruction != instructions_end) {
switch(*instruction++) {
case SSA_ASSIGN_INTER: {
SsaNumber number;
instruction += ssa_extract_form1(instruction, &ssa_ins_form1);
number = ssa_get_intermediate(ssa, ssa_ins_form1.rhs);
assert(ssa_ins_form1.lhs < NUM_MAX_REGS);
if(number.type == SSA_NUMBER_TYPE_INTEGER) {
fprintf(file, "i64 r%d = %zu;\n", ssa_ins_form1.lhs, number.value.integer);
reg_types[ssa_ins_form1.lhs] = self->parser->compiler->default_types.i64;
} else if(number.type == SSA_NUMBER_TYPE_FLOAT) {
fprintf(file, "f64 r%d = %f;\n", ssa_ins_form1.lhs, number.value.floating);
reg_types[ssa_ins_form1.lhs] = self->parser->compiler->default_types.f64;
} else {
assert(bool_false && "TODO: Implement");
}
break;
}
case SSA_ASSIGN_STRING: {
BufferView str;
instruction += ssa_extract_form1(instruction, &ssa_ins_form1);
str = ssa_get_string(ssa, ssa_ins_form1.rhs);
fprintf(file, "const char* r%d = \"%.*s\";\n", ssa_ins_form1.lhs, (int)str.size, str.data);
assert(ssa_ins_form1.lhs < NUM_MAX_REGS);
reg_types[ssa_ins_form1.lhs] = self->parser->compiler->default_types.str;
break;
}
case SSA_ASSIGN_REG: {
LhsExpr *rhs_type;
const char *rhs_type_name;
instruction += ssa_extract_form1(instruction, &ssa_ins_form1);
assert(ssa_ins_form1.rhs < NUM_MAX_REGS);
rhs_type = reg_types[ssa_ins_form1.rhs];
if(rhs_type == self->parser->compiler->default_types.i64) {
rhs_type_name = "i64";
} else if(rhs_type == self->parser->compiler->default_types.f64) {
rhs_type_name = "f64";
} else if(rhs_type == self->parser->compiler->default_types.str) {
rhs_type_name = "const char*";
} else {
amal_log_error("Invalid rhs type %p for reg %d", rhs_type, ssa_ins_form1.rhs);
assert(bool_false && "TODO: Implement");
}
fprintf(file, "%s r%d = r%d;\n", rhs_type_name, ssa_ins_form1.lhs, ssa_ins_form1.rhs);
break;
}
case SSA_ADD: {
instruction += ssa_extract_form2(instruction, &ssa_ins_form2);
fprintf(file, "r%d = r%d + r%d;\n", ssa_ins_form2.result, ssa_ins_form2.lhs, ssa_ins_form2.rhs);
assert(ssa_ins_form2.result < NUM_MAX_REGS);
assert(ssa_ins_form2.rhs < NUM_MAX_REGS);
reg_types[ssa_ins_form2.result] = reg_types[ssa_ins_form2.rhs];
break;
}
case SSA_SUB: {
instruction += ssa_extract_form2(instruction, &ssa_ins_form2);
fprintf(file, "r%d = r%d - r%d;\n", ssa_ins_form2.result, ssa_ins_form2.lhs, ssa_ins_form2.rhs);
assert(ssa_ins_form2.result < NUM_MAX_REGS);
assert(ssa_ins_form2.rhs < NUM_MAX_REGS);
reg_types[ssa_ins_form2.result] = reg_types[ssa_ins_form2.rhs];
break;
}
case SSA_MUL: {
instruction += ssa_extract_form2(instruction, &ssa_ins_form2);
fprintf(file, "r%d = r%d * r%d;\n", ssa_ins_form2.result, ssa_ins_form2.lhs, ssa_ins_form2.rhs);
assert(ssa_ins_form2.result < NUM_MAX_REGS);
assert(ssa_ins_form2.rhs < NUM_MAX_REGS);
reg_types[ssa_ins_form2.result] = reg_types[ssa_ins_form2.rhs];
break;
}
case SSA_DIV: {
instruction += ssa_extract_form2(instruction, &ssa_ins_form2);
fprintf(file, "r%d = r%d / r%d;\n", ssa_ins_form2.result, ssa_ins_form2.lhs, ssa_ins_form2.rhs);
assert(ssa_ins_form2.result < NUM_MAX_REGS);
assert(ssa_ins_form2.rhs < NUM_MAX_REGS);
reg_types[ssa_ins_form2.result] = reg_types[ssa_ins_form2.rhs];
break;
}
case SSA_FUNC_START: {
int i;
instruction += ssa_extract_func_start(instruction, &ssa_ins_func_start);
fprintf(file, "void f%zu(", ssa_ins_func_start.func_index);
fputs(") {\n", file);
for(i = 0; i < ssa_ins_func_start.num_args; ++i) {
if(i > 0)
fputs(", ", file);
fprintf(file, "p%d", i);
}
break;
}
case SSA_FUNC_END:
fputs("}\n", file);
break;
case SSA_PUSH: {
SsaRegister reg;
am_memcpy(®, instruction, sizeof(SsaRegister));
instruction += sizeof(SsaRegister);
fprintf(file, "PUSH r%d ***\n", reg);
break;
}
case SSA_CALL:
instruction += ssa_extract_func_call(instruction, &ssa_ins_func_call);
fprintf(file, "r%d = CALL %p ***\n", ssa_ins_func_call.result, ssa_ins_func_call.func_decl);
break;
}
}
fclose(file);
}
void generate_bytecode_from_ssa(BytecodeCompilerContext *self) {
add_intermediates(self);
add_instructions(self);
}
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