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Subversion Repositories natalius_8bit_risc

[/] [natalius_8bit_risc/] [trunk/] [assembler/] [assembler.py] - Blame information for rev 14

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Line No. Rev Author Line
1 2 fabioandre 
#!/usr/bin/python
2 
 
3 
import sys
4 
import re
5 
 
6 
tipo1=['ldi','ldm','stm', 'adi']
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tipo2=['cmp','add','sub','and','oor','xor']
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tipo3=['jmp','jpz','jnz','jpc','jnc','csr', 'csz', 'cnz', 'csc', 'cnc']
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tipo4=['sl0','sl1','sr0','sr1','rrl','rrr', 'not']
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tipo5=['ret', 'nop']
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#instruccion   opcode
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opcodes={}
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opcodes['ldi']=2;
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opcodes['ldm']=3;
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opcodes['stm']=4;
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opcodes['cmp']=5;
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opcodes['add']=6;
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opcodes['sub']=7;
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opcodes['and']=8;
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opcodes['oor']=9;
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opcodes['xor']=10;
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opcodes['jmp']=11;
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opcodes['jpz']=12;
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opcodes['jnz']=13;
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opcodes['jpc']=14;
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opcodes['jnc']=15;
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opcodes['csr']=16;
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opcodes['ret']=17;
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opcodes['adi']=18;
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opcodes['csz']=19;
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opcodes['cnz']=20;
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opcodes['csc']=21;
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opcodes['cnc']=22;
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opcodes['sl0']=23;
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opcodes['sl1']=24;
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opcodes['sr0']=25;
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opcodes['sr1']=26;
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opcodes['rrl']=27;
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opcodes['rrr']=28;
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opcodes['not']=29;
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opcodes['nop']=30;
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44 
 
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def verify_args(line):
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    if len(line)>1:
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        line_split=line.split()
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        opcode=line_split[0]
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        if opcode in tipo1+tipo2+tipo4:
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            args=re.findall(r'r(\d+)',line)
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    else:
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        return 'invalid command'
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    if not opcode in tipo1+tipo2+tipo3+tipo4+tipo5:
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        return 'invalid command'
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    else:
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        if opcode in tipo1:
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            arg2=line.split(',')
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            direccion=arg2[1]
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            if len(args)!=1 :
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                return 'incorrect number of arguments'
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            else:
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                if int(args[0])<0 or int(args[0])>7:
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                    return 'arg1 out of range (0-7)'
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                else:
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                    if int(direccion)<0 or int(direccion)>255:
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                        return 'addr out of range (0-255)'
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                    else:
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                        return 'ok'
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        if opcode in tipo2:
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            if len(args)!=2:
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                return 'incorrect number of arguments'
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            else:
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                if int(args[0])<0 or int(args[0])>7:
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                    return 'arg1 out of range (0-7)'
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                else:
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                    if int(args[1])<0 or int(args[1])>7:
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                        return 'arg2 out of range (0-7)'
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                    else:
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                        return 'ok'
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        if opcode in tipo3:
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            addr=line_split[1]
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            if len(line_split)!=2:
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                return 'incorrect argument'
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            else:
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                if int(addr)<0 or int(addr)>2048:
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                    return 'addr out of range (0-2048)'
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                else:
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                    return 'ok'
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        if opcode in tipo4:
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            if len(args)!=2 :
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                return 'incorrect number of arguments'
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            else:
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                if int(args[1])<0 or int(args[1])>7:
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                    return 'arg1 out of range (0-7)'
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                else:
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                    return 'ok'
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        if opcode in tipo5:
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            return 'ok'
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105 
 
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def extract_info(file,flag):
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    tags={}
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    f=open(file,'rU')
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    text=f.read()
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    f.close()
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    text=text.lower()
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113 
 
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    #para quitar los saltos de linea '\n' '\t' al final del archivo
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    while text[-1]=='\n' or text[-1]=='\t' or text[-1]=='\s' or text[-1]=='\r':
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        text=text[:-1]
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    lines=text.split('\n')
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    line_number=0
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    lines2=[]
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    for line in lines:
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        if len(line)!=0:
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            line_split=line.split()
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            opcode=line_split[0]
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            if not opcode in tipo1+tipo2+tipo3+tipo4+tipo5:
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                if not opcode in tags:
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                    tags[opcode]=line_number
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                    line=' '.join(line_split[1:])
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                    line='\t'+line
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                else:
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                    print 'label used more than once'
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            lines2.append(line)
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            line_number+=1
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    text2='\n'.join(lines2)
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    ##parte que se encarga de reemplazar los tags en las direcciones
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    for tags_elements in tags.keys():
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        line2=text2.split(tags_elements)
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        text2=str(tags[tags_elements]).join(line2)
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    lines=text2.split('\n')
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    error_line=0
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    text_asm=''
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    for line in lines:
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        erro=verify_args(line)
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        if erro!='ok':
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            print 'error in line:',error_line
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            print line, '->', erro,'\n'
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        else:
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            line_split=line.split()
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            opcode=line_split[0]
156 
            if opcode in tipo1+tipo2+tipo4:
157 
                args=re.findall(r'r(\d+)',line)
158 
            if opcode in tipo1:
159 
                arg2=line.split(',')
160 
                direccion=arg2[1]
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                dato=(opcodes[opcode]<<11) | (int(args[0])<<8) | int(direccion)
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                text_asm+= '%X' % dato + '\n'
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            if opcode in tipo2:
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                dato=(opcodes[opcode]<<11) | (int(args[0])<<8) | (int(args[1])<<5)
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                text_asm+= '%X' % dato + '\n'
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            if opcode in tipo3:
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                addr=line_split[1]
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                dato=(opcodes[opcode]<<11) | int(addr)
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                text_asm+= '%X' % dato + '\n'
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            if opcode in tipo4:
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                dato=(opcodes[opcode]<<11) | (int(args[1])<<8)
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                text_asm+= '%X' % dato + '\n'
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            if opcode in tipo5:
174 
                dato=(opcodes[opcode]<<11)
175 
                text_asm+= '%X' % dato + '\n'
176 
        error_line+=1
177 
 
178 
    line_show=text2.split('\n')
179 
    line_text=text_asm.split('\n')
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181 
    if flag:
182 
        print 'addr inst\t\t\t\tasm\n'
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        for i in range(len(line_show)):
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            esp=4-len(line_text[i])
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            val=''
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            while esp:
187 
                esp-=1
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                val+=' '
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190 
            ntabs=5-len(str(i))
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            tab=' '
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            etab=''
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            ctabs=0
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            while ctabs<ntabs:
195 
                ctabs+=1
196 
                etab+=tab
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198 
            print str(i)+etab+line_text[i]+val+'\t'+line_show[i]
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200 
    line_zero=''
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202 
    for i in range(2048-len(line_show)):
203 
        line_zero=line_zero+'0000\n'
204 
    text_asm+=line_zero
205 
 
206 
    return text_asm
207 
 
208 
def main():
209 
 
210 
    args = sys.argv[1:]
211 
 
212 
    if not args:
213 
        print 'uso: ./assembler.py [-s] archivo.asm'
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        sys.exit(1)
215 
 
216 
    show = False
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    if args[0] == '-s':
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        show = True
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        del args[0]
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221 
    text=extract_info(args[0],show)
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    outf = open('instructions.mem', 'w')
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    outf.write(text)
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    outf.close()
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if __name__ == '__main__':
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  main()

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