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fellnhofer |
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%{
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#include
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#include
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#include "tools.h"
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#define YYERROR_VERBOSE
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int temp;
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int firstpass=1;
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void yyerror(const char *str)
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{
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fprintf(stderr,"error: %s\n",str);
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}
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int yywrap()
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{
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return 1;
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}
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int main(int argc, char **argv)
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{
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if(argc>=2) {
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if(!strcmp(argv[1], "-h")) hex = 1;
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if(!strcmp(argv[1], "-b")) hex = 2;
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}
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if(!hash_init()) {
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exit(1);
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printf("could not create hash table\n");
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}
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if(hex && argc==3) stdin = fopen(argv[2], "r");
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if(!hex && argc==2) stdin = fopen(argv[1], "r");
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firstpass = 1;
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address = 0;
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if(yyparse()) exit(1);
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firstpass = 0;
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address = 0;
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rewind(stdin);
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(void) PROC_FLUSH_BUF (stdin );
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yyparse();
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return 0;
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}
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%}
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%token C OBRA CBRA OSBRA CSBRA NUM
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%union
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{
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int num;
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char *str;
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}
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%token IMM LABEL USELAB
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%token REG
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%token ARI LDI LSI CMP BR SHA JUMP CALL MOV MEM SEL SELI LDL NOP
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%type asms asm nop ari ldsi cmp br sha jmpcall mov mem sel seli ldl
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%type imm6b imm8b imm8bs imm2b imm32
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%%
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asms: asm | asms asm
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asm: LABEL {if(firstpass)add_label($1, address);}
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| nop {if(!firstpass)xprintf($1);address++;}
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| ari {if(!firstpass)xprintf($1);address++;}
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| ldsi {if(!firstpass)xprintf($1);address++;}
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| cmp {if(!firstpass)xprintf($1);address++;}
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| br {if(!firstpass)xprintf($1);address++;}
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| sha {if(!firstpass)xprintf($1);address++;}
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| jmpcall {if(!firstpass)xprintf($1);address++;}
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| mov {if(!firstpass)xprintf($1);address++;}
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| mem {if(!firstpass)xprintf($1);address++;}
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| sel {if(!firstpass)xprintf($1);address++;}
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| seli {if(!firstpass)xprintf($1);address++;}
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| ldl {;}
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// | { yyerror("unknown instruction"); YYERROR; }
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nop: NOP { $$ = $1; }
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ari: ARI REG C REG C REG { $$ = ($1<<12) | ($2<<8) | ($4<<4) | $6; }
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ldsi: LDI REG C imm8b { $$ = (0x6000) | ($2<<8) | ($4&0xff); }
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| LSI REG C imm8b { $$ = (0x7000) | ($2<<8) | ($4&0xff); }
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cmp: CMP REG C REG C REG { $$ = (0x8000) | ($1<<12) | ($2<<8) | ($4<<4) | $6;}
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br: BR REG C USELAB { $$ = (0xc000) | ($1<<12) | (((get_label($4)-address)&0xff) << 4) | $2;
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// if(!firstpass) printf(" @%d - %d: %d", address, $4, get_label($4));
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}
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| BR REG C imm8bs { $$ = (0xc000) | ($1<<12) | (($4&0xff) << 4) | $2; }
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sha: SHA REG C imm6b { $$ = (0xe000) | ($2<<8) | ($1<<6) | ($4&0x3f); }
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| SHA REG C REG C imm6b { if(($2^0x8) != $4) { yyerror("wrong sister register"); YYERROR; }
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$$ = (0xe000) | ($2<<8) | (1<<7) | ($1<<6) | ($6&0x3f); }
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jmpcall:JUMP OSBRA REG CSBRA { $$ = (0xf000) | ($3<<4) | $1; }
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| CALL REG C OSBRA REG CSBRA { $$ = (0xf000) | ($2<<8) | ($5<<4) | $1; }
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mov: MOV REG C REG { $$ = (0xf000) | ($2<<8) | ($4<<4) | 1; }
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mem: MEM REG C OBRA REG CBRA { $$ = (0xf000) | ($2<<8) | ($5<<4) | $1; }
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sel: SEL REG C OBRA REG CBRA { $$ = (0xf000) | ($2<<8) | ($5<<4) | $1; }
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| SEL REG C REG C OBRA REG CBRA { if(($2^0x8) != $4) { yyerror("wrong sister register"); YYERROR; }
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$$ = (0xf000) | ($2<<8) | ($7<<4) | (1<<3) | $1; }
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seli: SELI REG C imm2b { $$ = (0xf000) | ($2<<8) | ($4<<6) | $1; }
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| SELI REG C REG C imm2b { if(($2^0x8) != $4) { yyerror("wrong sister register"); YYERROR; }
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$$ = (0xf000) | ($2<<8) | ($6<<4) | (1<<3) | $1; }
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ldl: LDL REG C imm32
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{ if(!firstpass)xprintf(0x6000|($2<<8)|(($4>>24)&0xff));address++;
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if(!firstpass)xprintf(0x7000|($2<<8)|(($4>>18)&0xff));address++;
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if(!firstpass)xprintf(0x7000|($2<<8)|(($4>>8)&0xff));address++;
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if(!firstpass)xprintf(0x7000|($2<<8)|(($4>>0)&0xff));address++;
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}
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| LDL REG C USELAB
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{ temp = get_abs_label($4);
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if(!firstpass)xprintf(0x6000|($2<<8)|((temp>>24)&0xff));address++;
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if(!firstpass)xprintf(0x7000|($2<<8)|((temp>>18)&0xff));address++;
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if(!firstpass)xprintf(0x7000|($2<<8)|((temp>>8)&0xff));address++;
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if(!firstpass)xprintf(0x7000|($2<<8)|((temp>>0)&0xff));address++;
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}
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imm2b: IMM {
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temp = check_imm($1, &$$, 0, 3);
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if(temp==1) { yyerror("2 Bit immediate expected"); YYERROR; }
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if(temp==2) { yyerror("Immediate syntax"); YYERROR; }
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}
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imm8b: IMM {
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temp = check_imm($1, &$$, 0, 255);
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if(temp==1) { yyerror("8 Bit unsigned immediate expected"); YYERROR; }
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if(temp==2) { yyerror("Immediate syntax"); YYERROR; }
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}
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imm8bs: IMM {
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temp = check_imm($1, &$$, -128, 127);
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if(temp==1) { yyerror("8 bit signed immediate expected"); YYERROR; }
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if(temp==2) { yyerror("Immediate syntax"); YYERROR; }
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}
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// | LABEL { $$ = get_label($1) - address - 1; }
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imm6b: IMM {
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temp = check_imm($1, &$$, -32, 31);
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if(temp==1) { printf("Immediate Value %d out of range: -32..31 allowed\n", $$); YYERROR; }
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if(temp==2) { yyerror("Immediate syntax"); YYERROR; }
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}
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imm32: IMM {
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temp = check_imm($1, &$$, 0x1000000, 0x7fffffff);
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if(temp==1) { printf("Immediate Value %d out of range: -32b..31b allowed\n", $$); YYERROR; }
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if(temp==2) { yyerror("Immediate syntax"); YYERROR; }
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}
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%%
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