%{
#include <string.h>
#include <stdlib.h>
#include "parser.tab.h"
extern int yylex();
extern size_t line_number;
%}
%option noyywrap
%%
\".*\"                          {
    yylval.s_val = strdup(yytext+1);
    char *const close_paren = strrchr(yylval.s_val, '"');
    if (close_paren != NULL) {
        *close_paren = '\0';
    }
    return T_STRING;
}
,                               { return T_COMMA; }
\(                              { return T_OPENPAREN; }
\)                              { return T_CLOSEPAREN; }
#.*                             ;
[ \t]                           ;
\n                              { ++line_number; return T_ENDL; }
0x[0-9A-Fa-f]+                  { yylval.i_val = atoi(yytext); return T_INTEGER; }
-*[0-9]+                        { yylval.i_val = atoi(yytext); return T_INTEGER; }
lb                              { yylval.instruction = strdup(yytext); return T_INSTRUCTION; }
lh                              { yylval.instruction = strdup(yytext); return T_INSTRUCTION; }
lw                              { yylval.instruction = strdup(yytext); return T_INSTRUCTION; }
ld                              { yylval.instruction = strdup(yytext); return T_INSTRUCTION; }
lbu                             { yylval.instruction = strdup(yytext); return T_INSTRUCTION; }
lhu                             { yylval.instruction = strdup(yytext); return T_INSTRUCTION; }
lwu                             { yylval.instruction = strdup(yytext); return T_INSTRUCTION; }
sb                              { yylval.instruction = strdup(yytext); return T_INSTRUCTION; }
sh                              { yylval.instruction = strdup(yytext); return T_INSTRUCTION; }
sw                              { yylval.instruction = strdup(yytext); return T_INSTRUCTION; }
sd                              { yylval.instruction = strdup(yytext); return T_INSTRUCTION; }
li                              { yylval.instruction = strdup(yytext); return T_INSTRUCTION; }
lui                             { yylval.instruction = strdup(yytext); return T_INSTRUCTION; }
auipc                           { yylval.instruction = strdup(yytext); return T_INSTRUCTION; }
mv                              { yylval.instruction = strdup(yytext); return T_INSTRUCTION; }
sext.b                          { yylval.instruction = strdup(yytext); return T_INSTRUCTION; }
sext.h                          { yylval.instruction = strdup(yytext); return T_INSTRUCTION; }
sext.w                          { yylval.instruction = strdup(yytext); return T_INSTRUCTION; }
zext.b                          { yylval.instruction = strdup(yytext); return T_INSTRUCTION; }
zext.h                          { yylval.instruction = strdup(yytext); return T_INSTRUCTION; }
zext.w                          { yylval.instruction = strdup(yytext); return T_INSTRUCTION; }
rev8                            { yylval.instruction = strdup(yytext); return T_INSTRUCTION; }
czero.eqz                       { yylval.instruction = strdup(yytext); return T_INSTRUCTION; }
czero.nez                       { yylval.instruction = strdup(yytext); return T_INSTRUCTION; }
addi                            { yylval.instruction = strdup(yytext); return T_INSTRUCTION; }
add                             { yylval.instruction = strdup(yytext); return T_INSTRUCTION; }
sh1add                          { yylval.instruction = strdup(yytext); return T_INSTRUCTION; }
sh2add                          { yylval.instruction = strdup(yytext); return T_INSTRUCTION; }
sh3add                          { yylval.instruction = strdup(yytext); return T_INSTRUCTION; }
add.wu                          { yylval.instruction = strdup(yytext); return T_INSTRUCTION; }
sh1add.wu                       { yylval.instruction = strdup(yytext); return T_INSTRUCTION; }
sh2add.wu                       { yylval.instruction = strdup(yytext); return T_INSTRUCTION; }
sh3add.wu                       { yylval.instruction = strdup(yytext); return T_INSTRUCTION; }
addiw                           { yylval.instruction = strdup(yytext); return T_INSTRUCTION; }
addw                            { yylval.instruction = strdup(yytext); return T_INSTRUCTION; }
sub                             { yylval.instruction = strdup(yytext); return T_INSTRUCTION; }
subw                            { yylval.instruction = strdup(yytext); return T_INSTRUCTION; }
neg                             { yylval.instruction = strdup(yytext); return T_INSTRUCTION; }
negw                            { yylval.instruction = strdup(yytext); return T_INSTRUCTION; }
mul                             { yylval.instruction = strdup(yytext); return T_INSTRUCTION; }
mulw                            { yylval.instruction = strdup(yytext); return T_INSTRUCTION; }
mulh                            { yylval.instruction = strdup(yytext); return T_INSTRUCTION; }
mulhu                           { yylval.instruction = strdup(yytext); return T_INSTRUCTION; }
mulhsu                          { yylval.instruction = strdup(yytext); return T_INSTRUCTION; }
div                             { yylval.instruction = strdup(yytext); return T_INSTRUCTION; }
divu                            { yylval.instruction = strdup(yytext); return T_INSTRUCTION; }
rem                             { yylval.instruction = strdup(yytext); return T_INSTRUCTION; }
remu                            { yylval.instruction = strdup(yytext); return T_INSTRUCTION; }
min                             { yylval.instruction = strdup(yytext); return T_INSTRUCTION; }
max                             { yylval.instruction = strdup(yytext); return T_INSTRUCTION; }
minu                            { yylval.instruction = strdup(yytext); return T_INSTRUCTION; }
maxu                            { yylval.instruction = strdup(yytext); return T_INSTRUCTION; }
seqz                            { yylval.instruction = strdup(yytext); return T_INSTRUCTION; }
snez                            { yylval.instruction = strdup(yytext); return T_INSTRUCTION; }
slti                            { yylval.instruction = strdup(yytext); return T_INSTRUCTION; }
slt                             { yylval.instruction = strdup(yytext); return T_INSTRUCTION; }
sltiu                           { yylval.instruction = strdup(yytext); return T_INSTRUCTION; }
sltu                            { yylval.instruction = strdup(yytext); return T_INSTRUCTION; }
bexti                           { yylval.instruction = strdup(yytext); return T_INSTRUCTION; }
bext                            { yylval.instruction = strdup(yytext); return T_INSTRUCTION; }
andi                            { yylval.instruction = strdup(yytext); return T_INSTRUCTION; }
and                             { yylval.instruction = strdup(yytext); return T_INSTRUCTION; }
andn                            { yylval.instruction = strdup(yytext); return T_INSTRUCTION; }
bclri                           { yylval.instruction = strdup(yytext); return T_INSTRUCTION; }
bclr                            { yylval.instruction = strdup(yytext); return T_INSTRUCTION; }
ori                             { yylval.instruction = strdup(yytext); return T_INSTRUCTION; }
or                              { yylval.instruction = strdup(yytext); return T_INSTRUCTION; }
orn                             { yylval.instruction = strdup(yytext); return T_INSTRUCTION; }
bseti                           { yylval.instruction = strdup(yytext); return T_INSTRUCTION; }
bset                            { yylval.instruction = strdup(yytext); return T_INSTRUCTION; }
xori                            { yylval.instruction = strdup(yytext); return T_INSTRUCTION; }
xor                             { yylval.instruction = strdup(yytext); return T_INSTRUCTION; }
xnor                            { yylval.instruction = strdup(yytext); return T_INSTRUCTION; }
binvi                           { yylval.instruction = strdup(yytext); return T_INSTRUCTION; }
binv                            { yylval.instruction = strdup(yytext); return T_INSTRUCTION; }
not                             { yylval.instruction = strdup(yytext); return T_INSTRUCTION; }
orc.b                           { yylval.instruction = strdup(yytext); return T_INSTRUCTION; }
slli                            { yylval.instruction = strdup(yytext); return T_INSTRUCTION; }
sll                             { yylval.instruction = strdup(yytext); return T_INSTRUCTION; }
slliw                           { yylval.instruction = strdup(yytext); return T_INSTRUCTION; }
sllw                            { yylval.instruction = strdup(yytext); return T_INSTRUCTION; }
slli.wu                         { yylval.instruction = strdup(yytext); return T_INSTRUCTION; }
srli                            { yylval.instruction = strdup(yytext); return T_INSTRUCTION; }
srl                             { yylval.instruction = strdup(yytext); return T_INSTRUCTION; }
srliw                           { yylval.instruction = strdup(yytext); return T_INSTRUCTION; }
srlw                            { yylval.instruction = strdup(yytext); return T_INSTRUCTION; }
srai                            { yylval.instruction = strdup(yytext); return T_INSTRUCTION; }
sra                             { yylval.instruction = strdup(yytext); return T_INSTRUCTION; }
sraiw                           { yylval.instruction = strdup(yytext); return T_INSTRUCTION; }
sraw                            { yylval.instruction = strdup(yytext); return T_INSTRUCTION; }
rori                            { yylval.instruction = strdup(yytext); return T_INSTRUCTION; }
ror                             { yylval.instruction = strdup(yytext); return T_INSTRUCTION; }
rol                             { yylval.instruction = strdup(yytext); return T_INSTRUCTION; }
roriw                           { yylval.instruction = strdup(yytext); return T_INSTRUCTION; }
rorw                            { yylval.instruction = strdup(yytext); return T_INSTRUCTION; }
rolw                            { yylval.instruction = strdup(yytext); return T_INSTRUCTION; }
clz                             { yylval.instruction = strdup(yytext); return T_INSTRUCTION; }
clzw                            { yylval.instruction = strdup(yytext); return T_INSTRUCTION; }
ctz                             { yylval.instruction = strdup(yytext); return T_INSTRUCTION; }
ctzw                            { yylval.instruction = strdup(yytext); return T_INSTRUCTION; }
cpop                            { yylval.instruction = strdup(yytext); return T_INSTRUCTION; }
cpopw                           { yylval.instruction = strdup(yytext); return T_INSTRUCTION; }
j                               { yylval.instruction = strdup(yytext); return T_INSTRUCTION; }
jal                             { yylval.instruction = strdup(yytext); return T_INSTRUCTION; }
jr                              { yylval.instruction = strdup(yytext); return T_INSTRUCTION; }
jalr                            { yylval.instruction = strdup(yytext); return T_INSTRUCTION; }
call                            { yylval.instruction = strdup(yytext); return T_INSTRUCTION; }
tail                            { yylval.instruction = strdup(yytext); return T_INSTRUCTION; }
ret                             { yylval.instruction = strdup(yytext); return T_INSTRUCTION; }
beq                             { yylval.instruction = strdup(yytext); return T_INSTRUCTION; }
bne                             { yylval.instruction = strdup(yytext); return T_INSTRUCTION; }
blt                             { yylval.instruction = strdup(yytext); return T_INSTRUCTION; }
bgt                             { yylval.instruction = strdup(yytext); return T_INSTRUCTION; }
bge                             { yylval.instruction = strdup(yytext); return T_INSTRUCTION; }
ble                             { yylval.instruction = strdup(yytext); return T_INSTRUCTION; }
bltu                            { yylval.instruction = strdup(yytext); return T_INSTRUCTION; }
bgtu                            { yylval.instruction = strdup(yytext); return T_INSTRUCTION; }
bgeu                            { yylval.instruction = strdup(yytext); return T_INSTRUCTION; }
bleu                            { yylval.instruction = strdup(yytext); return T_INSTRUCTION; }
nop                             { yylval.instruction = strdup(yytext); return T_INSTRUCTION; }
ecall                           { yylval.instruction = strdup(yytext); return T_INSTRUCTION; }
ebreak                          { yylval.instruction = strdup(yytext); return T_INSTRUCTION; }
zero                            { yylval.reg = strdup(yytext); return T_REGISTER; }
ra                              { yylval.reg = strdup(yytext); return T_REGISTER; }
sp                              { yylval.reg = strdup(yytext); return T_REGISTER; }
gp                              { yylval.reg = strdup(yytext); return T_REGISTER; }
tp                              { yylval.reg = strdup(yytext); return T_REGISTER; }
t0                              { yylval.reg = strdup(yytext); return T_REGISTER; }
t1                              { yylval.reg = strdup(yytext); return T_REGISTER; }
t2                              { yylval.reg = strdup(yytext); return T_REGISTER; }
s0                              { yylval.reg = strdup(yytext); return T_REGISTER; }
fp                              { yylval.reg = strdup(yytext); return T_REGISTER; }
s1                              { yylval.reg = strdup(yytext); return T_REGISTER; }
a0                              { yylval.reg = strdup(yytext); return T_REGISTER; }
a1                              { yylval.reg = strdup(yytext); return T_REGISTER; }
a2                              { yylval.reg = strdup(yytext); return T_REGISTER; }
a3                              { yylval.reg = strdup(yytext); return T_REGISTER; }
a4                              { yylval.reg = strdup(yytext); return T_REGISTER; }
a5                              { yylval.reg = strdup(yytext); return T_REGISTER; }
a6                              { yylval.reg = strdup(yytext); return T_REGISTER; }
a7                              { yylval.reg = strdup(yytext); return T_REGISTER; }
s2                              { yylval.reg = strdup(yytext); return T_REGISTER; }
s3                              { yylval.reg = strdup(yytext); return T_REGISTER; }
s4                              { yylval.reg = strdup(yytext); return T_REGISTER; }
s5                              { yylval.reg = strdup(yytext); return T_REGISTER; }
s6                              { yylval.reg = strdup(yytext); return T_REGISTER; }
s7                              { yylval.reg = strdup(yytext); return T_REGISTER; }
s8                              { yylval.reg = strdup(yytext); return T_REGISTER; }
s9                              { yylval.reg = strdup(yytext); return T_REGISTER; }
s10                             { yylval.reg = strdup(yytext); return T_REGISTER; }
s11                             { yylval.reg = strdup(yytext); return T_REGISTER; }
t3                              { yylval.reg = strdup(yytext); return T_REGISTER; }
t4                              { yylval.reg = strdup(yytext); return T_REGISTER; }
t5                              { yylval.reg = strdup(yytext); return T_REGISTER; }
t6                              { yylval.reg = strdup(yytext); return T_REGISTER; }
x0                              { yylval.reg = strdup(yytext); return T_REGISTER; }
x1                              { yylval.reg = strdup(yytext); return T_REGISTER; }
x2                              { yylval.reg = strdup(yytext); return T_REGISTER; }
x3                              { yylval.reg = strdup(yytext); return T_REGISTER; }
x4                              { yylval.reg = strdup(yytext); return T_REGISTER; }
x5                              { yylval.reg = strdup(yytext); return T_REGISTER; }
x6                              { yylval.reg = strdup(yytext); return T_REGISTER; }
x7                              { yylval.reg = strdup(yytext); return T_REGISTER; }
x8                              { yylval.reg = strdup(yytext); return T_REGISTER; }
x9                              { yylval.reg = strdup(yytext); return T_REGISTER; }
x10                             { yylval.reg = strdup(yytext); return T_REGISTER; }
x11                             { yylval.reg = strdup(yytext); return T_REGISTER; }
x12                             { yylval.reg = strdup(yytext); return T_REGISTER; }
x13                             { yylval.reg = strdup(yytext); return T_REGISTER; }
x14                             { yylval.reg = strdup(yytext); return T_REGISTER; }
x15                             { yylval.reg = strdup(yytext); return T_REGISTER; }
x16                             { yylval.reg = strdup(yytext); return T_REGISTER; }
x17                             { yylval.reg = strdup(yytext); return T_REGISTER; }
x18                             { yylval.reg = strdup(yytext); return T_REGISTER; }
x19                             { yylval.reg = strdup(yytext); return T_REGISTER; }
x20                             { yylval.reg = strdup(yytext); return T_REGISTER; }
x21                             { yylval.reg = strdup(yytext); return T_REGISTER; }
x22                             { yylval.reg = strdup(yytext); return T_REGISTER; }
x23                             { yylval.reg = strdup(yytext); return T_REGISTER; }
x24                             { yylval.reg = strdup(yytext); return T_REGISTER; }
x25                             { yylval.reg = strdup(yytext); return T_REGISTER; }
x26                             { yylval.reg = strdup(yytext); return T_REGISTER; }
x27                             { yylval.reg = strdup(yytext); return T_REGISTER; }
x28                             { yylval.reg = strdup(yytext); return T_REGISTER; }
x29                             { yylval.reg = strdup(yytext); return T_REGISTER; }
x30                             { yylval.reg = strdup(yytext); return T_REGISTER; }
x31                             { yylval.reg = strdup(yytext); return T_REGISTER; }
.align                          { yylval.directive = strdup(yytext); return T_DIRECTIVE; }
.globl                          { yylval.directive = strdup(yytext); return T_DIRECTIVE; }
.local                          { yylval.directive = strdup(yytext); return T_DIRECTIVE; }
.ident                          { yylval.directive = strdup(yytext); return T_DIRECTIVE; }
.section                        { yylval.directive = strdup(yytext); return T_DIRECTIVE; }
.size                           { yylval.directive = strdup(yytext); return T_DIRECTIVE; }
.text                           { yylval.directive = strdup(yytext); return T_DIRECTIVE; }
.data                           { yylval.directive = strdup(yytext); return T_DIRECTIVE; }
.rodata                         { yylval.directive = strdup(yytext); return T_DIRECTIVE; }
.bss                            { yylval.directive = strdup(yytext); return T_DIRECTIVE; }
.string                         { yylval.directive = strdup(yytext); return T_DIRECTIVE; }
.asciz                          { yylval.directive = strdup(yytext); return T_DIRECTIVE; }
.equ                            { yylval.directive = strdup(yytext); return T_DIRECTIVE; }
.byte                           { yylval.directive = strdup(yytext); return T_DIRECTIVE; }
.2byte                          { yylval.directive = strdup(yytext); return T_DIRECTIVE; }
.half                           { yylval.directive = strdup(yytext); return T_DIRECTIVE; }
.short                          { yylval.directive = strdup(yytext); return T_DIRECTIVE; }
.4byte                          { yylval.directive = strdup(yytext); return T_DIRECTIVE; }
.word                           { yylval.directive = strdup(yytext); return T_DIRECTIVE; }
.long                           { yylval.directive = strdup(yytext); return T_DIRECTIVE; }
.8byte                          { yylval.directive = strdup(yytext); return T_DIRECTIVE; }
.dword                          { yylval.directive = strdup(yytext); return T_DIRECTIVE; }
.quad                           { yylval.directive = strdup(yytext); return T_DIRECTIVE; }
.float                          { yylval.directive = strdup(yytext); return T_DIRECTIVE; }
.double                         { yylval.directive = strdup(yytext); return T_DIRECTIVE; }
.zero                           { yylval.directive = strdup(yytext); return T_DIRECTIVE; }
%hi                             { yylval.modifier = strdup(yytext); return T_MODIFIER; }
%lo                             { yylval.modifier = strdup(yytext); return T_MODIFIER; }
%pcrel_hi                       { yylval.modifier = strdup(yytext); return T_MODIFIER; }
%pcrel_lo                       { yylval.modifier = strdup(yytext); return T_MODIFIER; }
%tprel_hi                       { yylval.modifier = strdup(yytext); return T_MODIFIER; }
%tprel_lo                       { yylval.modifier = strdup(yytext); return T_MODIFIER; }
%tprel_add                      { yylval.modifier = strdup(yytext); return T_MODIFIER; }
%tls_ie_pcrel_hi                { yylval.modifier = strdup(yytext); return T_MODIFIER; }
%tls_gd_pcrel_hi                { yylval.modifier = strdup(yytext); return T_MODIFIER; }
%got_pcrel_hi                   { yylval.modifier = strdup(yytext); return T_MODIFIER; }
^[a-zA-Z0-9\.\_]+:              {
    yylval.symbol = strdup(yytext);
    char *const colon = strrchr(yylval.symbol, ':');
    if (colon != NULL) {
        *colon = '\0';
    }
    return T_LABEL;
}
[a-zA-Z\_\.]+[a-zA-Z0-9\_\.]*   { yylval.modifier = strdup(yytext); return T_SYMBOL; }
.                               ;
%%