1 files changed, 7 insertions, 0 deletions
diff --git a/lexer.l b/lexer.l
index 6b6b121..f3a540c 100644
--- a/lexer.l
+++ b/lexer.l
@@ -2,6 +2,8 @@
 
 #include "parser.h"
 
+#define SETVALUE(v) yylval.arg = (struct argument) { .value = (v) }
+
 %}
 
 %option outfile="lexer.c" header-file="lexer.h"
@@ -13,6 +15,7 @@
 COMMENT    #[^\n]*
 SP         [ \t]
 EOI        [ \t\n#]
+REGNUM     [0-7]
 
 %%
 
@@ -54,6 +57,10 @@ EOI        [ \t\n#]
 <inst>addpc/{EOI}        { BEGIN(args);    return T_ADDPC;  }
 <inst>nop/{EOI}          { BEGIN(args);    return T_NOP;    }
 
+<args>r{REGNUM}          { SETVALUE(yytext[1]-'0'); return T_REG;    }
+<args>@r{REGNUM}         { SETVALUE(yytext[2]-'0'); return T_REGPTR; }
+<args>{SP}*,{SP}*        { return T_COMMA; }
+
 {SP}*{COMMENT}?\n        { BEGIN(INITIAL); return T_EOL;    }
 {SP}*{COMMENT}           { BEGIN(INITIAL); return T_EOL;    }
 {SP}+                    {                 return T_SPACE;  }