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cc_core.c
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/* Copyright (C) 2016 Jeremiah Orians
* Copyright (C) 2018 Jan (janneke) Nieuwenhuizen <[email protected]>
* Copyright (C) 2020 deesix <[email protected]>
* Copyright (C) 2021 Andrius Štikonas <[email protected]>
* This file is part of M2-Planet.
*
* M2-Planet 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.
*
* M2-Planet 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 M2-Planet. If not, see <http://www.gnu.org/licenses/>.
*/
#include "cc.h"
#include "gcc_req.h"
#include <stdint.h>
/* Global lists */
struct token_list* global_symbol_list;
struct token_list* global_function_list;
struct token_list* global_constant_list;
/* Core lists for this file */
struct token_list* function;
/* What we are currently working on */
struct type* current_target;
char* break_target_head;
char* break_target_func;
char* break_target_num;
char* continue_target_head;
struct token_list* break_frame;
int current_count;
int Address_of;
/* Imported functions */
char* int2str(int x, int base, int signed_p);
int strtoint(char *a);
char* parse_string(char* string);
int escape_lookup(char* c);
void require(int bool, char* error);
struct token_list* reverse_list(struct token_list* head);
struct type* mirror_type(struct type* source, char* name);
struct type* add_primitive(struct type* a);
struct token_list* emit(char *s, struct token_list* head)
{
struct token_list* t = calloc(1, sizeof(struct token_list));
require(NULL != t, "Exhausted memory while generating token to emit\n");
t->next = head;
t->s = s;
return t;
}
void emit_out(char* s)
{
output_list = emit(s, output_list);
}
struct token_list* uniqueID(char* s, struct token_list* l, char* num)
{
l = emit("\n", emit(num, emit("_", emit(s, l))));
return l;
}
void uniqueID_out(char* s, char* num)
{
output_list = uniqueID(s, output_list, num);
}
struct token_list* sym_declare(char *s, struct type* t, struct token_list* list)
{
struct token_list* a = calloc(1, sizeof(struct token_list));
require(NULL != a, "Exhausted memory while attempting to declare a symbol\n");
a->next = list;
a->s = s;
a->type = t;
return a;
}
struct token_list* sym_lookup(char *s, struct token_list* symbol_list)
{
struct token_list* i;
for(i = symbol_list; NULL != i; i = i->next)
{
if(match(i->s, s)) return i;
}
return NULL;
}
void line_error_token(struct token_list *token)
{
if(NULL == token)
{
fputs("EOF reached inside of line_error\n", stderr);
fputs("problem at end of file\n", stderr);
return;
}
fputs(token->filename, stderr);
fputs(":", stderr);
fputs(int2str(token->linenumber, 10, TRUE), stderr);
fputs(":", stderr);
}
void line_error(void)
{
line_error_token(global_token);
}
void require_match(char* message, char* required)
{
if(NULL == global_token)
{
line_error();
fputs("EOF reached inside of require match\n", stderr);
fputs("problem at end of file\n", stderr);
fputs(message, stderr);
exit(EXIT_FAILURE);
}
if(!match(global_token->s, required))
{
line_error();
fputs(message, stderr);
exit(EXIT_FAILURE);
}
global_token = global_token->next;
}
void maybe_bootstrap_error(char* feature)
{
if (BOOTSTRAP_MODE)
{
line_error();
fputs(feature, stderr);
fputs(" is not supported in --bootstrap-mode\n", stderr);
exit(EXIT_FAILURE);
}
}
void expression(void);
void function_call(char* s, int bool)
{
require_match("ERROR in process_expression_list\nNo ( was found\n", "(");
require(NULL != global_token, "Improper function call\n");
int passed = 0;
if((KNIGHT_POSIX == Architecture) || (KNIGHT_NATIVE == Architecture))
{
emit_out("PUSHR R13 R15\t# Prevent overwriting in recursion\n");
emit_out("PUSHR R14 R15\t# Protect the old base pointer\n");
emit_out("COPY R13 R15\t# Copy new base pointer\n");
}
else if(X86 == Architecture)
{
emit_out("push_edi\t# Prevent overwriting in recursion\n");
emit_out("push_ebp\t# Protect the old base pointer\n");
emit_out("mov_edi,esp\t# Copy new base pointer\n");
}
else if(AMD64 == Architecture)
{
emit_out("push_rdi\t# Prevent overwriting in recursion\n");
emit_out("push_rbp\t# Protect the old base pointer\n");
emit_out("mov_rdi,rsp\t# Copy new base pointer\n");
}
else if(ARMV7L == Architecture)
{
emit_out("{R11} PUSH_ALWAYS\t# Prevent overwriting in recursion\n");
emit_out("{BP} PUSH_ALWAYS\t# Protect the old base pointer\n");
emit_out("'0' SP R11 NO_SHIFT MOVE_ALWAYS\t# Copy new base pointer\n");
}
else if(AARCH64 == Architecture)
{
emit_out("PUSH_X16\t# Protect a tmp register we're going to use\n");
emit_out("PUSH_LR\t# Protect the old return pointer (link)\n");
emit_out("PUSH_BP\t# Protect the old base pointer\n");
emit_out("SET_X16_FROM_SP\t# The base pointer to-be\n");
}
else if(RISCV32 == Architecture)
{
emit_out("rd_sp rs1_sp !-12 addi\t# Allocate stack\n");
emit_out("rs1_sp rs2_ra @4 sw\t# Protect the old return pointer\n");
emit_out("rs1_sp rs2_fp sw\t# Protect the old frame pointer\n");
emit_out("rs1_sp rs2_tp @8 sw\t# Protect temp register we are going to use\n");
emit_out("rd_tp rs1_sp mv\t# The base pointer to-be\n");
}
else if(RISCV64 == Architecture)
{
emit_out("rd_sp rs1_sp !-24 addi\t# Allocate stack\n");
emit_out("rs1_sp rs2_ra @8 sd\t# Protect the old return pointer\n");
emit_out("rs1_sp rs2_fp sd\t# Protect the old frame pointer\n");
emit_out("rs1_sp rs2_tp @16 sd\t# Protect temp register we are going to use\n");
emit_out("rd_tp rs1_sp mv\t# The base pointer to-be\n");
}
if(global_token->s[0] != ')')
{
expression();
require(NULL != global_token, "incomplete function call, received EOF instead of )\n");
if((KNIGHT_POSIX == Architecture) || (KNIGHT_NATIVE == Architecture)) emit_out("PUSHR R0 R15\t#_process_expression1\n");
else if(X86 == Architecture) emit_out("push_eax\t#_process_expression1\n");
else if(AMD64 == Architecture) emit_out("push_rax\t#_process_expression1\n");
else if(ARMV7L == Architecture) emit_out("{R0} PUSH_ALWAYS\t#_process_expression1\n");
else if(AARCH64 == Architecture) emit_out("PUSH_X0\t#_process_expression1\n");
else if(RISCV32 == Architecture) emit_out("rd_sp rs1_sp !-4 addi\nrs1_sp rs2_a0 sw\t#_process_expression1\n");
else if(RISCV64 == Architecture) emit_out("rd_sp rs1_sp !-8 addi\nrs1_sp rs2_a0 sd\t#_process_expression1\n");
passed = 1;
while(global_token->s[0] == ',')
{
global_token = global_token->next;
require(NULL != global_token, "incomplete function call, received EOF instead of argument\n");
expression();
if((KNIGHT_POSIX == Architecture) || (KNIGHT_NATIVE == Architecture)) emit_out("PUSHR R0 R15\t#_process_expression2\n");
else if(X86 == Architecture) emit_out("push_eax\t#_process_expression2\n");
else if(AMD64 == Architecture) emit_out("push_rax\t#_process_expression2\n");
else if(ARMV7L == Architecture) emit_out("{R0} PUSH_ALWAYS\t#_process_expression2\n");
else if(AARCH64 == Architecture) emit_out("PUSH_X0\t#_process_expression2\n");
else if(RISCV32 == Architecture) emit_out("rd_sp rs1_sp !-4 addi\nrs1_sp rs2_a0 sw\t#_process_expression2\n");
else if(RISCV64 == Architecture) emit_out("rd_sp rs1_sp !-8 addi\nrs1_sp rs2_a0 sd\t#_process_expression2\n");
passed = passed + 1;
}
}
require_match("ERROR in process_expression_list\nNo ) was found\n", ")");
if(TRUE == bool)
{
if((KNIGHT_POSIX == Architecture) || (KNIGHT_NATIVE == Architecture))
{
emit_out("LOAD R0 R14 ");
emit_out(s);
emit_out("\nMOVE R14 R13\n");
emit_out("CALL R0 R15\n");
}
else if(X86 == Architecture)
{
emit_out("lea_eax,[ebp+DWORD] %");
emit_out(s);
emit_out("\nmov_eax,[eax]\n");
emit_out("mov_ebp,edi\n");
emit_out("call_eax\n");
}
else if(AMD64 == Architecture)
{
emit_out("lea_rax,[rbp+DWORD] %");
emit_out(s);
emit_out("\nmov_rax,[rax]\n");
emit_out("mov_rbp,rdi\n");
emit_out("call_rax\n");
}
else if(ARMV7L == Architecture)
{
emit_out("!");
emit_out(s);
emit_out(" R0 SUB BP ARITH_ALWAYS\n");
emit_out("!0 R0 LOAD32 R0 MEMORY\n");
emit_out("{LR} PUSH_ALWAYS\t# Protect the old link register\n");
emit_out("'0' R11 BP NO_SHIFT MOVE_ALWAYS\n");
emit_out("'3' R0 CALL_REG_ALWAYS\n");
emit_out("{LR} POP_ALWAYS\t# Prevent overwrite\n");
}
else if(AARCH64 == Architecture)
{
emit_out("SET_X0_FROM_BP\n");
emit_out("LOAD_W1_AHEAD\nSKIP_32_DATA\n%");
emit_out(s);
emit_out("\nSUB_X0_X0_X1\n");
emit_out("DEREF_X0\n");
emit_out("SET_BP_FROM_X16\n");
emit_out("SET_X16_FROM_X0\n");
emit_out("BLR_X16\n");
}
else if(RISCV32 == Architecture)
{
emit_out("rd_a0 rs1_fp !");
emit_out(s);
emit_out(" addi\n");
emit_out("rd_a0 rs1_a0 lw\n");
emit_out("rd_fp rs1_tp mv\n");
emit_out("rd_ra rs1_a0 jalr\n");
}
else if(RISCV64 == Architecture)
{
emit_out("rd_a0 rs1_fp !");
emit_out(s);
emit_out(" addi\n");
emit_out("rd_a0 rs1_a0 ld\n");
emit_out("rd_fp rs1_tp mv\n");
emit_out("rd_ra rs1_a0 jalr\n");
}
}
else
{
if((KNIGHT_NATIVE == Architecture) || (KNIGHT_POSIX == Architecture))
{
emit_out("MOVE R14 R13\n");
emit_out("LOADR R0 4\nJUMP 4\n&FUNCTION_");
emit_out(s);
emit_out("\nCALL R0 R15\n");
}
else if(X86 == Architecture)
{
emit_out("mov_ebp,edi\n");
emit_out("call %FUNCTION_");
emit_out(s);
emit_out("\n");
}
else if(AMD64 == Architecture)
{
emit_out("mov_rbp,rdi\n");
emit_out("call %FUNCTION_");
emit_out(s);
emit_out("\n");
}
else if(ARMV7L == Architecture)
{
emit_out("{LR} PUSH_ALWAYS\t# Protect the old link register\n");
emit_out("'0' R11 BP NO_SHIFT MOVE_ALWAYS\n");
emit_out("^~FUNCTION_");
emit_out(s);
emit_out(" CALL_ALWAYS\n");
emit_out("{LR} POP_ALWAYS\t# Restore the old link register\n");
}
else if(AARCH64 == Architecture)
{
emit_out("SET_BP_FROM_X16\n");
emit_out("LOAD_W16_AHEAD\nSKIP_32_DATA\n&FUNCTION_");
emit_out(s);
emit_out("\n");
emit_out("BLR_X16\n");
}
else if((RISCV32 == Architecture) || (RISCV64 == Architecture))
{
emit_out("rd_fp rs1_tp mv\n");
emit_out("rd_ra $FUNCTION_");
emit_out(s);
emit_out(" jal\n");
}
}
for(; passed > 0; passed = passed - 1)
{
if((KNIGHT_POSIX == Architecture) || (KNIGHT_NATIVE == Architecture)) emit_out("POPR R1 R15\t# _process_expression_locals\n");
else if(X86 == Architecture) emit_out("pop_ebx\t# _process_expression_locals\n");
else if(AMD64 == Architecture) emit_out("pop_rbx\t# _process_expression_locals\n");
else if(ARMV7L == Architecture) emit_out("{R1} POP_ALWAYS\t# _process_expression_locals\n");
else if(AARCH64 == Architecture) emit_out("POP_X1\t# _process_expression_locals\n");
else if(RISCV32 == Architecture) emit_out("rd_a1 rs1_sp lw\t# _process_expression_locals\nrd_sp rs1_sp !4 addi\n");
else if(RISCV64 == Architecture) emit_out("rd_a1 rs1_sp ld\t# _process_expression_locals\nrd_sp rs1_sp !8 addi\n");
}
if((KNIGHT_POSIX == Architecture) || (KNIGHT_NATIVE == Architecture))
{
emit_out("POPR R14 R15\t# Restore old base pointer\n");
emit_out("POPR R13 R15\t# Prevent overwrite\n");
}
else if(X86 == Architecture)
{
emit_out("pop_ebp\t# Restore old base pointer\n");
emit_out("pop_edi\t# Prevent overwrite\n");
}
else if(AMD64 == Architecture)
{
emit_out("pop_rbp\t# Restore old base pointer\n");
emit_out("pop_rdi\t# Prevent overwrite\n");
}
else if(ARMV7L == Architecture)
{
emit_out("{BP} POP_ALWAYS\t# Restore old base pointer\n");
emit_out("{R11} POP_ALWAYS\t# Prevent overwrite\n");
}
else if(AARCH64 == Architecture)
{
emit_out("POP_BP\t# Restore the old base pointer\n");
emit_out("POP_LR\t# Restore the old return pointer (link)\n");
emit_out("POP_X16\t# Restore a register we used as tmp\n");
}
else if(RISCV32 == Architecture)
{
emit_out("rd_fp rs1_sp lw\t# Restore old frame pointer\n");
emit_out("rd_tp rs1_sp !8 lw\t# Restore temp register\n");
emit_out("rd_ra rs1_sp !4 lw\t# Restore return address\n");
emit_out("rd_sp rs1_sp !12 addi\t# Deallocate stack\n");
}
else if(RISCV64 == Architecture)
{
emit_out("rd_fp rs1_sp ld\t# Restore old frame pointer\n");
emit_out("rd_tp rs1_sp !16 ld\t# Restore temp register\n");
emit_out("rd_ra rs1_sp !8 ld\t# Restore return address\n");
emit_out("rd_sp rs1_sp !24 addi\t# Deallocate stack\n");
}
}
void constant_load(char* s)
{
if((KNIGHT_POSIX == Architecture) || (KNIGHT_NATIVE == Architecture)) emit_out("LOADI R0 ");
else if(X86 == Architecture) emit_out("mov_eax, %");
else if(AMD64 == Architecture) emit_out("mov_rax, %");
else if(ARMV7L == Architecture) emit_out("!0 R0 LOAD32 R15 MEMORY\n~0 JUMP_ALWAYS\n%");
else if(AARCH64 == Architecture) emit_out("LOAD_W0_AHEAD\nSKIP_32_DATA\n%");
else if((RISCV32 == Architecture) || (RISCV64 == Architecture))
{
emit_out("rd_a0 ~");
emit_out(s);
emit_out(" lui\nrd_a0 rs1_a0 !");
}
emit_out(s);
if(RISCV32 == Architecture) emit_out(" addi\n");
else if(RISCV64 == Architecture) emit_out(" addiw\n");
emit_out("\n");
}
char* load_value_signed(unsigned size)
{
if(size == 1)
{
if((KNIGHT_POSIX == Architecture) || (KNIGHT_NATIVE == Architecture)) return "LOAD8 R0 R0 0\n";
else if(X86 == Architecture) return "movsx_eax,BYTE_PTR_[eax]\n";
else if(AMD64 == Architecture) return "movsx_rax,BYTE_PTR_[rax]\n";
else if(ARMV7L == Architecture) return "LOADS8 R0 LOAD R0 HALF_MEMORY\n";
else if(AARCH64 == Architecture) return "LDRSB_X0_[X0]\n";
else if((RISCV32 == Architecture) || (RISCV64 == Architecture)) return "rd_a0 rs1_a0 lb\n";
}
else if(size == 2)
{
if((KNIGHT_POSIX == Architecture) || (KNIGHT_NATIVE == Architecture)) return "LOAD16 R0 R0 0\n";
else if(X86 == Architecture) return "movsx_eax,WORD_PTR_[eax]\n";
else if(AMD64 == Architecture) return "movsx_rax,WORD_PTR_[rax]\n";
else if(ARMV7L == Architecture) return "LOADS16 R0 LOAD R0 HALF_MEMORY\n";
else if(AARCH64 == Architecture) return "LDRSH_X0_[X0]\n";
else if((RISCV32 == Architecture) || (RISCV64 == Architecture)) return "rd_a0 rs1_a0 lh\n";
}
else if(size == 4)
{
if((KNIGHT_POSIX == Architecture) || (KNIGHT_NATIVE == Architecture)) return "LOAD R0 R0 0\n";
else if(X86 == Architecture) return "mov_eax,[eax]\n";
else if(AMD64 == Architecture) return "movsx_rax,DWORD_PTR_[rax]\n";
else if(ARMV7L == Architecture) return "!0 R0 LOAD32 R0 MEMORY\n";
else if(AARCH64 == Architecture) return "LDR_W0_[X0]\n";
else if((RISCV32 == Architecture) || (RISCV64 == Architecture)) return "rd_a0 rs1_a0 lw\n";
}
else if(size == 8)
{
if(AMD64 == Architecture) return "mov_rax,[rax]\n";
else if(AARCH64 == Architecture) return "DEREF_X0\n";
else if(RISCV64 == Architecture) return "rd_a0 rs1_a0 ld\n";
}
line_error();
fputs(" Got unsupported size ", stderr);
fputs(int2str(size, 10, TRUE), stderr);
fputs(" when trying to load value.\n", stderr);
exit(EXIT_FAILURE);
}
char* load_value_unsigned(unsigned size)
{
if(size == 1)
{
if((KNIGHT_POSIX == Architecture) || (KNIGHT_NATIVE == Architecture)) return "LOADU8 R0 R0 0\n";
else if(X86 == Architecture) return "movzx_eax,BYTE_PTR_[eax]\n";
else if(AMD64 == Architecture) return "movzx_rax,BYTE_PTR_[rax]\n";
else if(ARMV7L == Architecture) return "!0 R0 LOAD R0 MEMORY\n";
else if(AARCH64 == Architecture) return "DEREF_X0_BYTE\n";
else if((RISCV32 == Architecture) || (RISCV64 == Architecture)) return "rd_a0 rs1_a0 lbu\n";
}
else if(size == 2)
{
if((KNIGHT_POSIX == Architecture) || (KNIGHT_NATIVE == Architecture)) return "LOADU16 R0 R0 0\n";
else if(X86 == Architecture) return "movzx_eax,WORD_PTR_[eax]\n";
else if(AMD64 == Architecture) return "movzx_rax,WORD_PTR_[rax]\n";
else if(ARMV7L == Architecture) return "NO_OFFSET R0 LOAD R0 HALF_MEMORY\n";
else if(AARCH64 == Architecture) return "LDRH_W0_[X0]\n";
else if((RISCV32 == Architecture) || (RISCV64 == Architecture)) return "rd_a0 rs1_a0 lhu\n";
}
else if(size == 4)
{
if((KNIGHT_POSIX == Architecture) || (KNIGHT_NATIVE == Architecture)) return "LOAD R0 R0 0\n";
else if(X86 == Architecture) return "mov_eax,[eax]\n";
else if(AMD64 == Architecture) return "mov_eax,[rax]\n";
else if(ARMV7L == Architecture) return "!0 R0 LOAD32 R0 MEMORY\n";
else if(AARCH64 == Architecture) return "LDR_W0_[X0]\n";
else if(RISCV32 == Architecture) return "rd_a0 rs1_a0 lw\n";
else if(RISCV64 == Architecture) return "rd_a0 rs1_a0 lwu\n";
}
else if(size == 8)
{
if(AMD64 == Architecture) return "mov_rax,[rax]\n";
else if(AARCH64 == Architecture) return "DEREF_X0\n";
else if(RISCV64 == Architecture) return "rd_a0 rs1_a0 ld\n";
}
line_error();
fputs(" Got unsupported size ", stderr);
fputs(int2str(size, 10, TRUE), stderr);
fputs(" when trying to load value.\n", stderr);
exit(EXIT_FAILURE);
}
char* load_value(unsigned size, int is_signed)
{
if(is_signed) return load_value_signed(size);
return load_value_unsigned(size);
}
char* store_value(unsigned size)
{
if(size == 1)
{
if((KNIGHT_POSIX == Architecture) || (KNIGHT_NATIVE == Architecture)) return "STORE8 R0 R1 0\n";
else if(X86 == Architecture) return "mov_[ebx],al\n";
else if(AMD64 == Architecture) return "mov_[rbx],al\n";
else if(ARMV7L == Architecture) return "!0 R0 STORE8 R1 MEMORY\n";
else if(AARCH64 == Architecture) return "STR_BYTE_W0_[X1]\n";
else if(RISCV32 == Architecture) return "rs1_a1 rs2_a0 sb\n";
else if(RISCV64 == Architecture) return "rs1_a1 rs2_a0 sb\n";
}
else if(size == 2)
{
if((KNIGHT_POSIX == Architecture) || (KNIGHT_NATIVE == Architecture)) return "STORE16 R0 R1 0\n";
else if(X86 == Architecture) return "mov_[ebx],ax\n";
else if(AMD64 == Architecture) return "mov_[rbx],ax\n";
else if(ARMV7L == Architecture) return "NO_OFFSET R0 STORE16 R1 HALF_MEMORY\n";
else if(AARCH64 == Architecture) return "STRH_W0_[X1]\n";
else if(RISCV32 == Architecture || RISCV64 == Architecture) return "rs1_a1 rs2_a0 sh\n";
}
else if(size == 4)
{
if((KNIGHT_POSIX == Architecture) || (KNIGHT_NATIVE == Architecture)) return "STORE R0 R1 0\n";
else if(X86 == Architecture) return "mov_[ebx],eax\n";
else if(AMD64 == Architecture) return "mov_[rbx],eax\n";
else if(ARMV7L == Architecture) return "!0 R0 STORE32 R1 MEMORY\n";
else if(AARCH64 == Architecture) return "STR_W0_[X1]\n";
else if(RISCV32 == Architecture || RISCV64 == Architecture) return "rs1_a1 rs2_a0 sw\n";
}
else if(size == 8)
{
if(AMD64 == Architecture) return "mov_[rbx],rax\n";
else if(AARCH64 == Architecture) return "STR_X0_[X1]\n";
else if(RISCV64 == Architecture) return "rs1_a1 rs2_a0 sd\n";
}
/* Should not happen but print error message. */
fputs("Got unsupported size ", stderr);
fputs(int2str(size, 10, TRUE), stderr);
fputs(" when storing number in register.\n", stderr);
line_error();
exit(EXIT_FAILURE);
}
int is_compound_assignment(char* token)
{
if(match("+=", token)) return TRUE;
else if(match("-=", token)) return TRUE;
else if(match("*=", token)) return TRUE;
else if(match("/=", token)) return TRUE;
else if(match("%=", token)) return TRUE;
else if(match("<<=", token)) return TRUE;
else if(match(">>=", token)) return TRUE;
else if(match("&=", token)) return TRUE;
else if(match("^=", token)) return TRUE;
else if(match("|=", token)) return TRUE;
return FALSE;
}
void postfix_expr_stub(void);
void variable_load(struct token_list* a, int num_dereference)
{
require(NULL != global_token, "incomplete variable load received\n");
if((match("FUNCTION", a->type->name) || match("FUNCTION*", a->type->name)) && match("(", global_token->s))
{
function_call(int2str(a->depth, 10, TRUE), TRUE);
return;
}
current_target = a->type;
if((KNIGHT_POSIX == Architecture) || (KNIGHT_NATIVE == Architecture)) emit_out("ADDI R0 R14 ");
else if(X86 == Architecture) emit_out("lea_eax,[ebp+DWORD] %");
else if(AMD64 == Architecture) emit_out("lea_rax,[rbp+DWORD] %");
else if(ARMV7L == Architecture) emit_out("!");
else if(AARCH64 == Architecture) emit_out("SET_X0_FROM_BP\nLOAD_W1_AHEAD\nSKIP_32_DATA\n%");
else if((RISCV32 == Architecture) || (RISCV64 == Architecture)) emit_out("rd_a0 rs1_fp !");
emit_out(int2str(a->depth, 10, TRUE));
if(ARMV7L == Architecture) emit_out(" R0 SUB BP ARITH_ALWAYS");
else if(AARCH64 == Architecture) emit_out("\nSUB_X0_X0_X1\n");
else if((RISCV32 == Architecture) || (RISCV64 == Architecture)) emit_out(" addi");
emit_out("\n");
if(TRUE == Address_of) return;
if(match(".", global_token->s))
{
postfix_expr_stub();
return;
}
if(!match("=", global_token->s) && !is_compound_assignment(global_token->s))
{
emit_out(load_value(current_target->size, current_target->is_signed));
}
while (num_dereference > 0)
{
current_target = current_target->type;
emit_out(load_value(current_target->size, current_target->is_signed));
num_dereference = num_dereference - 1;
}
}
void function_load(struct token_list* a)
{
require(NULL != global_token, "incomplete function load\n");
if(match("(", global_token->s))
{
function_call(a->s, FALSE);
return;
}
if((KNIGHT_NATIVE == Architecture) || (KNIGHT_POSIX == Architecture)) emit_out("LOADR R0 4\nJUMP 4\n&FUNCTION_");
else if(X86 == Architecture) emit_out("mov_eax, &FUNCTION_");
else if(AMD64 == Architecture) emit_out("lea_rax,[rip+DWORD] %FUNCTION_");
else if(ARMV7L == Architecture) emit_out("!0 R0 LOAD32 R15 MEMORY\n~0 JUMP_ALWAYS\n&FUNCTION_");
else if(AARCH64 == Architecture) emit_out("LOAD_W0_AHEAD\nSKIP_32_DATA\n&FUNCTION_");
else if((RISCV32 == Architecture) || (RISCV64 == Architecture)) emit_out("rd_a0 ~FUNCTION_");
emit_out(a->s);
if(RISCV32 == Architecture)
{
emit_out(" auipc\n");
emit_out("rd_a0 rs1_a0 !FUNCTION_");
emit_out(a->s);
emit_out(" addi");
}
else if(RISCV64 == Architecture)
{
emit_out(" auipc\n");
emit_out("rd_a0 rs1_a0 !FUNCTION_");
emit_out(a->s);
emit_out(" addiw");
}
emit_out("\n");
}
void global_load(struct token_list* a)
{
current_target = a->type;
if((KNIGHT_NATIVE == Architecture) || (KNIGHT_POSIX == Architecture)) emit_out("LOADR R0 4\nJUMP 4\n&GLOBAL_");
else if(X86 == Architecture) emit_out("mov_eax, &GLOBAL_");
else if(AMD64 == Architecture) emit_out("lea_rax,[rip+DWORD] %GLOBAL_");
else if(ARMV7L == Architecture) emit_out("!0 R0 LOAD32 R15 MEMORY\n~0 JUMP_ALWAYS\n&GLOBAL_");
else if(AARCH64 == Architecture) emit_out("LOAD_W0_AHEAD\nSKIP_32_DATA\n&GLOBAL_");
else if((RISCV32 == Architecture) || (RISCV64 == Architecture)) emit_out("rd_a0 ~GLOBAL_");
emit_out(a->s);
if((RISCV32 == Architecture) || (RISCV64 == Architecture))
{
emit_out(" auipc\n");
emit_out("rd_a0 rs1_a0 !GLOBAL_");
emit_out(a->s);
emit_out(" addi");
}
emit_out("\n");
require(NULL != global_token, "unterminated global load\n");
if(TRUE == Address_of) return;
if(match(".", global_token->s))
{
postfix_expr_stub();
return;
}
if(match("=", global_token->s) || is_compound_assignment(global_token->s)) return;
emit_out(load_value(register_size, current_target->is_signed));
}
/*
* primary-expr:
* FAILURE
* "String"
* 'Char'
* [0-9]*
* [a-z,A-Z]*
* ( expression )
*/
void primary_expr_failure(void)
{
require(NULL != global_token, "hit EOF when expecting primary expression\n");
line_error();
fputs("Received ", stderr);
fputs(global_token->s, stderr);
fputs(" in primary_expr\n", stderr);
exit(EXIT_FAILURE);
}
void primary_expr_string(void)
{
char* number_string = int2str(current_count, 10, TRUE);
current_count = current_count + 1;
if((KNIGHT_NATIVE == Architecture) || (KNIGHT_POSIX == Architecture)) emit_out("LOADR R0 4\nJUMP 4\n&STRING_");
else if(X86 == Architecture) emit_out("mov_eax, &STRING_");
else if(AMD64 == Architecture) emit_out("lea_rax,[rip+DWORD] %STRING_");
else if(ARMV7L == Architecture) emit_out("!0 R0 LOAD32 R15 MEMORY\n~0 JUMP_ALWAYS\n&STRING_");
else if(AARCH64 == Architecture) emit_out("LOAD_W0_AHEAD\nSKIP_32_DATA\n&STRING_");
else if((RISCV32 == Architecture) || (RISCV64 == Architecture)) emit_out("rd_a0 ~STRING_");
uniqueID_out(function->s, number_string);
if((RISCV32 == Architecture) || (RISCV64 == Architecture))
{
emit_out("auipc\n");
emit_out("rd_a0 rs1_a0 !STRING_");
uniqueID_out(function->s, number_string);
emit_out("addi\n");
}
/* The target */
strings_list = emit(":STRING_", strings_list);
strings_list = uniqueID(function->s, strings_list, number_string);
/* catch case of just "foo" from segfaulting */
require(NULL != global_token->next, "a string by itself is not valid C\n");
/* Parse the string */
if('"' != global_token->next->s[0])
{
strings_list = emit(parse_string(global_token->s), strings_list);
global_token = global_token->next;
}
else
{
char* s = calloc(MAX_STRING, sizeof(char));
/* prefix leading string */
s[0] = '"';
int i = 1;
int j;
while('"' == global_token->s[0])
{
/* Step past the leading '"' */
j = 1;
/* Copy the rest of the string as is */
while(0 != global_token->s[j])
{
require(i < MAX_STRING, "concat string exceeded max string length\n");
s[i] = global_token->s[j];
i = i + 1;
j = j + 1;
}
/* Move on to the next token */
global_token = global_token->next;
require(NULL != global_token, "multi-string null is not valid C\n");
}
/* Now use it */
strings_list = emit(parse_string(s), strings_list);
}
}
void primary_expr_char(void)
{
if((KNIGHT_POSIX == Architecture) || (KNIGHT_NATIVE == Architecture)) emit_out("LOADI R0 ");
else if(X86 == Architecture) emit_out("mov_eax, %");
else if(AMD64 == Architecture) emit_out("mov_rax, %");
else if(ARMV7L == Architecture) emit_out("!");
else if(AARCH64 == Architecture) emit_out("LOAD_W0_AHEAD\nSKIP_32_DATA\n%");
else if((RISCV32 == Architecture) || (RISCV64 == Architecture)) emit_out("rd_a0 !");
emit_out(int2str(escape_lookup(global_token->s + 1), 10, TRUE));
if(ARMV7L == Architecture) emit_out(" R0 LOADI8_ALWAYS");
else if((RISCV32 == Architecture) || (RISCV64 == Architecture)) emit_out(" addi");
emit_out("\n");
global_token = global_token->next;
}
int hex2char(int c)
{
if((c >= 0) && (c <= 9)) return (c + 48);
else if((c >= 10) && (c <= 15)) return (c + 55);
else return -1;
}
char* number_to_hex(int a, int bytes)
{
require(bytes > 0, "number to hex must have a positive number of bytes greater than zero\n");
char* result = calloc(1 + (bytes << 1), sizeof(char));
if(NULL == result)
{
fputs("calloc failed in number_to_hex\n", stderr);
exit(EXIT_FAILURE);
}
int i = 0;
int divisor = (bytes << 3);
require(divisor > 0, "unexpected wrap around in number_to_hex\n");
/* Simply collect numbers until divisor is gone */
while(0 != divisor)
{
divisor = divisor - 4;
result[i] = hex2char((a >> divisor) & 0xF);
i = i + 1;
}
return result;
}
void primary_expr_number(char* s)
{
if((KNIGHT_POSIX == Architecture) || (KNIGHT_NATIVE == Architecture))
{
int size = strtoint(s);
if((32767 > size) && (size > -32768))
{
emit_out("LOADI R0 ");
emit_out(s);
}
else
{
emit_out("LOADR R0 4\nJUMP 4\n'");
emit_out(number_to_hex(size, register_size));
emit_out("'");
}
}
else if(X86 == Architecture)
{
emit_out("mov_eax, %");
emit_out(s);
}
else if(AMD64 == Architecture)
{
emit_out("mov_rax, %");
emit_out(s);
}
else if(ARMV7L == Architecture)
{
emit_out("!0 R0 LOAD32 R15 MEMORY\n~0 JUMP_ALWAYS\n%");
emit_out(s);
}
else if(AARCH64 == Architecture)
{
emit_out("LOAD_W0_AHEAD\nSKIP_32_DATA\n%");
emit_out(s);
}
else if((RISCV32 == Architecture) || (RISCV64 == Architecture))
{
int size = strtoint(s);
if((2047 > size) && (size > -2048))
{
emit_out("rd_a0 !");
emit_out(s);
emit_out(" addi");
}
else if (0 == (size >> 30))
{
emit_out("rd_a0 ~");
emit_out(s);
emit_out(" lui\n");
emit_out("rd_a0 rs1_a0 !");
emit_out(s);
emit_out(" addi");
}
else
{
int high = size >> 30;
int low = ((size >> 30) << 30) ^ size;
emit_out("rd_a0 ~");
emit_out(int2str(high, 10, TRUE));
emit_out(" lui\n");
emit_out("rd_a0 rs1_a0 !");
emit_out(int2str(high, 10, TRUE));
emit_out(" addi\n");
emit_out("rd_a0 rs1_a0 rs2_x30 slli\n");
emit_out("rd_t1 ~");
emit_out(int2str(low, 10, TRUE));
emit_out(" lui\n");
emit_out("rd_t1 rs1_t1 !");
emit_out(int2str(low, 10, TRUE));
emit_out(" addi\n");
emit_out("rd_a0 rs1_a0 rs2_t1 or\n");
}
}
emit_out("\n");
}
void primary_expr_variable(void)
{
int num_dereference = 0;
while(global_token->s[0] == '*') {
global_token = global_token->next;
require(NULL != global_token, "Walked off the end of a variable dereference\n");
num_dereference = num_dereference + 1;
}
char* s = global_token->s;
global_token = global_token->next;
struct token_list* a = sym_lookup(s, global_constant_list);
if(NULL != a)
{
constant_load(a->arguments->s);
return;
}
a = sym_lookup(s, function->locals);
if(NULL != a)
{
variable_load(a, num_dereference);
return;
}
a = sym_lookup(s, function->arguments);
if(NULL != a)
{
variable_load(a, num_dereference);
return;
}
a = sym_lookup(s, global_function_list);
if(NULL != a)
{
function_load(a);
return;
}
a = sym_lookup(s, global_symbol_list);
if(NULL != a)
{
global_load(a);
return;
}
line_error();
fputs(s ,stderr);
fputs(" is not a defined symbol\n", stderr);
exit(EXIT_FAILURE);
}
void primary_expr(void);
struct type* promote_type(struct type* a, struct type* b)
{
require(NULL != b, "impossible case 1 in promote_type\n");
require(NULL != a, "impossible case 2 in promote_type\n");
if(a == b) return a;
struct type* i;
for(i = global_types; NULL != i; i = i->next)
{
if(a->name == i->name) break;
if(b->name == i->name) break;
if(a->name == i->indirect->name) break;
if(b->name == i->indirect->name) break;
if(a->name == i->indirect->indirect->name) break;
if(b->name == i->indirect->indirect->name) break;
}
require(NULL != i, "impossible case 3 in promote_type\n");
return i;
}
void common_recursion(FUNCTION f)
{
if((KNIGHT_POSIX == Architecture) || (KNIGHT_NATIVE == Architecture)) emit_out("PUSHR R0 R15\t#_common_recursion\n");
else if(X86 == Architecture) emit_out("push_eax\t#_common_recursion\n");
else if(AMD64 == Architecture) emit_out("push_rax\t#_common_recursion\n");
else if(ARMV7L == Architecture) emit_out("{R0} PUSH_ALWAYS\t#_common_recursion\n");
else if(AARCH64 == Architecture) emit_out("PUSH_X0\t#_common_recursion\n");
else if(RISCV32 == Architecture) emit_out("rd_sp rs1_sp !-4 addi\t# _common_recursion\nrs1_sp rs2_a0 sw\n");
else if(RISCV64 == Architecture) emit_out("rd_sp rs1_sp !-8 addi\t# _common_recursion\nrs1_sp rs2_a0 sd\n");
struct type* last_type = current_target;
global_token = global_token->next;
require(NULL != global_token, "Received EOF in common_recursion\n");
f();
current_target = promote_type(current_target, last_type);
if((KNIGHT_POSIX == Architecture) || (KNIGHT_NATIVE == Architecture)) emit_out("POPR R1 R15\t# _common_recursion\n");
else if(X86 == Architecture) emit_out("pop_ebx\t# _common_recursion\n");
else if(AMD64 == Architecture) emit_out("pop_rbx\t# _common_recursion\n");
else if(ARMV7L == Architecture) emit_out("{R1} POP_ALWAYS\t# _common_recursion\n");
else if(AARCH64 == Architecture) emit_out("POP_X1\t# _common_recursion\n");
else if(RISCV32 == Architecture) emit_out("rd_a1 rs1_sp lw\nrd_sp rs1_sp !4 addi\t# _common_recursion\n");
else if(RISCV64 == Architecture) emit_out("rd_a1 rs1_sp ld\nrd_sp rs1_sp !8 addi\t# _common_recursion\n");
}
void general_recursion(FUNCTION f, char* s, char* name, FUNCTION iterate)
{
require(NULL != global_token, "Received EOF in general_recursion\n");
if(match(name, global_token->s))
{
common_recursion(f);
emit_out(s);
iterate();
}
}
void arithmetic_recursion(FUNCTION f, char* s1, char* s2, char* name, FUNCTION iterate)
{
require(NULL != global_token, "Received EOF in arithmetic_recursion\n");
if(match(name, global_token->s))
{