Commit | Line | Data |
---|---|---|
cb3898cb | 1 | /* Copyright (c) 1980 Regents of the University of California */ |
10973e2e | 2 | static char sccsid[] = "@(#)ascode.c 4.7 %G%"; |
cb3898cb | 3 | #include <stdio.h> |
cb3898cb BJ |
4 | #include "as.h" |
5 | #include "assyms.h" | |
6 | ||
5b3c350a RH |
7 | /* |
8 | * Loader reference types (plust PCREL) to bytes and lg bytes | |
9 | */ | |
10 | /* LEN1 LEN1+PC LEN2 LEN2+PC LEN4 LEN4+PC LEN8 LEN8+PC*/ | |
11 | int reflen[] = /* {LEN*+PCREL} ==> number of bytes */ | |
12 | {0, 0, 1, 1, 2, 2, 4, 4, 8, 8}; | |
13 | int lgreflen[] = /* {LEN*+PCREL} ==> lg number of bytes */ | |
14 | {-1, -1, 0, 0, 1, 1, 2, 2, 3, 3}; | |
15 | ||
16 | /* | |
17 | * Sizes to Loader reference types and type flags | |
18 | */ | |
19 | /*0 1 2 3 4 5 6 7 8*/ | |
20 | int len124[] = /* {1,2,4,8} ==> {LEN1, LEN2, LEN4, LEN8} */ | |
21 | {0, LEN1, LEN2, 0, LEN4, 0, 0, 0, LEN8}; | |
22 | char mod124[] = /* {1,2,4,8} ==> {bits to construct operands */ | |
23 | {0, 0x00, 0x20, 0, 0x40, 0, 0, 0, 0}; | |
24 | int type_124[] = /* {1,2,4,8} ==> {TYPB, TYPW, TYPL, TYPQ} */ | |
25 | {0, TYPB, TYPW, 0, TYPL, 0, 0, 0, TYPQ}; | |
26 | ||
27 | /* | |
28 | * type flags to Loader reference and byte lengths | |
29 | */ | |
30 | /*TYPB TYPW TYPL TYPQ TYPF TYPD*/ | |
31 | int ty_NORELOC[] = /* {TYPB..TYPD} ==> {1 if relocation not OK */ | |
32 | {0, 0, 0, 1, 1, 1}; | |
33 | int ty_LEN[] = /* {TYPB..TYPD} ==> {LEN1..LEN8} */ | |
34 | {LEN1, LEN2, LEN4, LEN8, LEN4, LEN8}; | |
35 | int ty_nbyte[] = /* {TYPB..TYPD} ==> {1,2,4,8} */ | |
36 | {1, 2, 4, 8, 4, 8}; | |
37 | int ty_nlg[] = /* {TYPB..TYPD} ==> lg{1,2,4,8} */ | |
38 | {0, 1, 2, 3, 2, 3}; | |
39 | ||
cb3898cb BJ |
40 | insout(op, ap, nact) |
41 | struct arg *ap; | |
42 | { | |
a264a1b2 RH |
43 | int jxxflg; |
44 | register struct instab *ip; /* the instruction */ | |
45 | register struct arg *ap_walk; /* actual param walk */ | |
46 | register int i; | |
47 | register int ap_type; /* actual param type */ | |
48 | register int ap_type_mask; /* masked actual param */ | |
cb3898cb BJ |
49 | op &= 0xFF; |
50 | jxxflg = nact; | |
51 | if (nact < 0) | |
52 | nact = -nact; | |
53 | if (passno == 1) { | |
a264a1b2 RH |
54 | ip = itab[op]; |
55 | if (nact < ip->i_nargs) | |
56 | yyerror("Too few arguments"); | |
57 | if (nact > ip->i_nargs) { | |
58 | yyerror("Too many arguments"); | |
59 | nact = ip->i_nargs; | |
60 | } | |
61 | /* | |
62 | * Check argument compatability with instruction template | |
63 | */ | |
64 | for (ap_walk = ap, i = 1; i <= nact; ap_walk++, i++){ | |
5b3c350a | 65 | ap_type = ap_walk->a_atype; |
a264a1b2 | 66 | ap_type_mask = ap_type & AMASK; |
10973e2e RH |
67 | /* |
68 | * The switch value is >> by 3 so that the switch | |
69 | * code is dense, not implemented as a sequence | |
70 | * of branches but implemented as a casel. | |
71 | * In addition, cases ACCI and ACCR are added to force | |
72 | * dense switch code. | |
73 | */ | |
74 | switch( ((fetcharg(ip, i-1)) & ACCESSMASK)>>3){ /* type of fp */ | |
75 | case ACCI >> 3: | |
76 | case ACCR >> 3: | |
77 | break; | |
78 | case ACCB >> 3: | |
a264a1b2 RH |
79 | if ( !((ap_type_mask == AEXP) || (ap_type_mask == AIMM)) ){ |
80 | yyerror("arg %d, branch displacement must be an expression",i); | |
81 | return; | |
82 | } | |
83 | break; | |
10973e2e | 84 | case ACCA >> 3: |
a264a1b2 RH |
85 | switch(ap_type_mask){ |
86 | case AREG: yyerror("arg %d, addressing a register",i); | |
87 | return; | |
88 | case AIMM: if ( !(ap_type & ASTAR) ){ | |
89 | yyerror("arg %d, addressing an immediate operand",i); | |
90 | return; | |
91 | } | |
92 | } | |
93 | break; | |
10973e2e RH |
94 | case ACCM >> 3: |
95 | case ACCW >> 3: | |
a264a1b2 RH |
96 | switch(ap_type_mask){ |
97 | case AIMM: if (!(ap_type&ASTAR)) { | |
98 | yyerror("arg %d, modifying a constant",i); | |
99 | return; | |
100 | } | |
101 | } | |
102 | break; | |
103 | } /* end of the switch on fp_type */ | |
104 | if (ap_type & AINDX) { | |
105 | if (ap_walk->a_areg2==0xF) { | |
106 | yyerror("arg %d, PC used as index",i); | |
107 | return; | |
108 | } | |
109 | switch(ap_type_mask){ | |
110 | case AREG: yyerror("arg %d, indexing the register file",i); | |
111 | return; | |
112 | case AIMM: yyerror("arg %d, indexing a constant",i); | |
113 | return; | |
5b3c350a RH |
114 | case ADECR: |
115 | case AINCR: if (ap_walk->a_areg1==ap_walk->a_areg2) { | |
a264a1b2 RH |
116 | yyerror("arg %d, indexing with modified register",i); |
117 | return; | |
118 | } | |
119 | break; | |
120 | } /* end of switch on ap_type_mask */ | |
121 | } /* end of AINDX */ | |
122 | } | |
123 | } /* both passes here */ | |
cb3898cb BJ |
124 | if (jxxflg < 0) |
125 | ijxout(op, ap, nact); | |
126 | else putins(op, ap, nact); | |
127 | } | |
128 | ||
cb3898cb | 129 | extern int d124; |
cb3898cb BJ |
130 | |
131 | putins(op, ap, n) | |
132 | /* | |
133 | * n had better be positive | |
134 | */ | |
135 | register struct arg *ap; | |
136 | { | |
137 | register struct exp *xp; | |
1e967e62 | 138 | register int argtype; |
5b3c350a RH |
139 | int i; |
140 | int reloc_how; | |
cb3898cb BJ |
141 | |
142 | #ifdef DEBUG | |
143 | fflush(stdout); | |
144 | #endif | |
145 | if (passno == 2) | |
146 | goto PASS2; | |
147 | ||
451260e7 RH |
148 | dotp->e_xvalue += n+1; /* 1 for the opcode, at least 1 per arg */ |
149 | for (i=0; i<n; i++,ap++) { /* some args take more than 1 byte */ | |
1e967e62 RH |
150 | argtype = ap->a_atype; |
151 | if (argtype & AINDX) | |
451260e7 | 152 | dotp->e_xvalue++; |
10973e2e RH |
153 | /* |
154 | * This switch has been fixed by enumerating the no action | |
155 | * alternatives (those that have 1 one byte of code) | |
156 | * so that a casel instruction is emitted. | |
157 | */ | |
1e967e62 | 158 | switch (argtype&~(AINDX|ASTAR)) { |
10973e2e RH |
159 | case AREG: |
160 | case ABASE: | |
161 | case ADECR: | |
162 | case AINCR: | |
163 | break; | |
cb3898cb | 164 | case AEXP: |
1e967e62 RH |
165 | argtype = fetcharg(itab[op], i); |
166 | if (argtype == ACCB+TYPB) | |
cb3898cb | 167 | break; |
1e967e62 | 168 | if (argtype==ACCB+TYPW){ |
451260e7 | 169 | dotp->e_xvalue++; |
cb3898cb BJ |
170 | break; |
171 | } | |
172 | /* | |
173 | * Reduces to PC relative | |
174 | */ | |
451260e7 | 175 | dotp->e_xvalue += ap->a_dispsize; |
cb3898cb BJ |
176 | break; |
177 | ||
178 | case ADISP: | |
451260e7 RH |
179 | xp=ap->a_xp; |
180 | if ((xp->e_xtype&XTYPE)!=XABS || xp->e_xtype&XFORW){ | |
181 | dotp->e_xvalue += ap->a_dispsize; | |
cb3898cb BJ |
182 | break; |
183 | } | |
1e967e62 | 184 | if (xp->e_xvalue==0 && !(argtype&ASTAR)) |
cb3898cb | 185 | break; |
451260e7 RH |
186 | dotp->e_xvalue++; |
187 | if ((xp->e_xvalue<MINBYTE) || (xp->e_xvalue>MAXBYTE)) | |
188 | dotp->e_xvalue++; | |
189 | if ((xp->e_xvalue<MINWORD) || (xp->e_xvalue>MAXWORD)) | |
190 | dotp->e_xvalue += 2; | |
cb3898cb BJ |
191 | break; |
192 | ||
193 | case AIMM: | |
1e967e62 | 194 | if (ap->a_atype&ASTAR) argtype=TYPL; |
cb3898cb | 195 | else { |
1e967e62 RH |
196 | argtype = fetcharg(itab[op], i); |
197 | if (argtype&ACCA) | |
198 | argtype = TYPL; | |
cb3898cb | 199 | else |
1e967e62 | 200 | argtype &= TYPMASK; |
451260e7 RH |
201 | xp = ap->a_xp; |
202 | if ( ((xp->e_xtype&XTYPE)==XABS) | |
203 | && (!(xp->e_xtype&XFORW)) | |
204 | && (xp->e_xvalue>=0) | |
205 | && (xp->e_xvalue<=63) | |
206 | && (xp->e_yvalue == 0) | |
1e967e62 RH |
207 | && (argtype != TYPD) |
208 | && (argtype != TYPF) | |
cb3898cb BJ |
209 | ) |
210 | break; | |
211 | } | |
1e967e62 | 212 | switch (argtype) { |
cb3898cb BJ |
213 | case TYPD: |
214 | case TYPF: | |
451260e7 RH |
215 | if ( !(((xp->e_xtype&XTYPE)==XABS) |
216 | && (!(xp->e_xtype&XFORW)) | |
cb3898cb BJ |
217 | && (slitflt(xp))) |
218 | ){ | |
219 | /* it is NOT short */ | |
1e967e62 | 220 | dotp->e_xvalue += ((argtype==TYPF)? |
cb3898cb BJ |
221 | 4 : 8); |
222 | } | |
223 | break; | |
224 | case TYPQ: | |
451260e7 | 225 | dotp->e_xvalue += 8;break; |
cb3898cb | 226 | case TYPL: |
451260e7 | 227 | dotp->e_xvalue += 4;break; |
cb3898cb | 228 | case TYPW: |
451260e7 | 229 | dotp->e_xvalue += 2;break; |
cb3898cb | 230 | case TYPB: |
451260e7 | 231 | dotp->e_xvalue += 1;break; |
1e967e62 | 232 | } /*end of the switch on argtype*/ |
cb3898cb BJ |
233 | } /*end of the switch on the type*/ |
234 | } /*end of looping for all arguments*/ | |
235 | return; | |
236 | ||
237 | PASS2: | |
238 | ||
239 | #ifdef UNIX | |
240 | outb(op); /* the opcode */ | |
241 | #endif UNIX | |
242 | #ifdef VMS | |
243 | *vms_obj_ptr++ = -1; *vms_obj_ptr++ = (char)op; | |
451260e7 | 244 | dotp->e_xvalue += 1; |
cb3898cb BJ |
245 | #endif VMS |
246 | ||
247 | for (i=0; i<n; i++,ap++) {/* now for the arguments */ | |
1e967e62 | 248 | argtype=ap->a_atype; |
451260e7 | 249 | xp=ap->a_xp; |
5b3c350a | 250 | reloc_how = TYPNONE; |
1e967e62 | 251 | if (argtype&AINDX) { |
cb3898cb | 252 | #ifdef UNIX |
451260e7 | 253 | { outb(0x40 | ap->a_areg2); } |
cb3898cb BJ |
254 | #endif UNIX |
255 | #ifdef VMS | |
256 | { *vms_obj_ptr++ = -1; | |
451260e7 RH |
257 | *vms_obj_ptr++ = (0x40 | ap->a_areg2); |
258 | dotp->e_xvalue += 1; } | |
cb3898cb | 259 | #endif VMS |
1e967e62 | 260 | argtype &= ~AINDX; |
cb3898cb | 261 | } |
1e967e62 | 262 | if (argtype&ASTAR) { |
451260e7 | 263 | ap->a_areg1 |= 0x10; |
1e967e62 | 264 | argtype &= ~ASTAR; |
cb3898cb | 265 | } |
1e967e62 | 266 | switch (argtype) { |
cb3898cb | 267 | case AREG: /* %r */ |
451260e7 | 268 | ap->a_areg1 |= 0x50; |
cb3898cb BJ |
269 | break; |
270 | case ABASE: /* (%r) */ | |
451260e7 | 271 | ap->a_areg1 |= 0x60; |
cb3898cb BJ |
272 | break; |
273 | case ADECR: /* -(%r) */ | |
451260e7 | 274 | ap->a_areg1 |= 0x70; |
cb3898cb | 275 | break; |
593d71c1 | 276 | case AINCR: /* (%r)+ */ |
451260e7 | 277 | ap->a_areg1 |= 0x80; |
cb3898cb BJ |
278 | break; |
279 | case AEXP: /* expr */ | |
1e967e62 RH |
280 | argtype = fetcharg(itab[op], i); |
281 | if (argtype == ACCB+TYPB) { | |
282 | ap->a_areg1 = argtype = | |
451260e7 | 283 | xp->e_xvalue - (dotp->e_xvalue + 1); |
1e967e62 | 284 | if (argtype<MINBYTE || argtype>MAXBYTE) |
cb3898cb BJ |
285 | yyerror("Branch too far"); break; |
286 | } | |
1e967e62 RH |
287 | if (argtype == ACCB+TYPW) { |
288 | ap->a_areg1 = argtype = xp->e_xvalue | |
451260e7 RH |
289 | -= dotp->e_xvalue + 2; |
290 | xp->e_xtype = XABS; | |
1e967e62 | 291 | if (argtype<MINWORD || argtype>MAXWORD) |
cb3898cb | 292 | yyerror("Branch too far"); |
1e967e62 | 293 | xp->e_xvalue = argtype>>8; |
5b3c350a | 294 | reloc_how = TYPB; |
cb3898cb BJ |
295 | break; |
296 | } | |
297 | /* reduces to expr(pc) mode */ | |
451260e7 | 298 | ap->a_areg1 |= (0xAF + mod124[ap->a_dispsize]); |
5b3c350a | 299 | reloc_how = type_124[ap->a_dispsize] + RELOC_PCREL; |
cb3898cb BJ |
300 | break; |
301 | ||
302 | case ADISP: /* expr(%r) */ | |
451260e7 RH |
303 | ap->a_areg1 |= 0xA0; |
304 | if ((xp->e_xtype&XTYPE)!=XABS || xp->e_xtype&XFORW){ | |
305 | ap->a_areg1 += mod124[ap->a_dispsize]; | |
5b3c350a | 306 | reloc_how = type_124[ap->a_dispsize]; |
cb3898cb BJ |
307 | break; |
308 | } | |
451260e7 RH |
309 | if (xp->e_xvalue==0 && !(ap->a_areg1&0x10)) { |
310 | ap->a_areg1 ^= 0xC0; | |
cb3898cb BJ |
311 | break; |
312 | } | |
5b3c350a | 313 | reloc_how = TYPB; |
451260e7 RH |
314 | if ((xp->e_xvalue<MINBYTE) || (xp->e_xvalue>MAXBYTE)){ |
315 | ap->a_areg1 += 0x20; | |
5b3c350a | 316 | reloc_how = TYPW; |
cb3898cb | 317 | } |
451260e7 RH |
318 | if ((xp->e_xvalue<MINWORD) || (xp->e_xvalue>MAXWORD)){ |
319 | ap->a_areg1 += 0x20; | |
5b3c350a | 320 | reloc_how = TYPL; |
cb3898cb BJ |
321 | } |
322 | break; | |
323 | ||
324 | case AIMM: /* $expr */ | |
451260e7 | 325 | if (ap->a_atype&ASTAR) |
1e967e62 | 326 | argtype=TYPL; |
cb3898cb | 327 | else { |
1e967e62 RH |
328 | argtype = fetcharg(itab[op], i); |
329 | if (argtype&ACCA) | |
330 | argtype=TYPL; | |
cb3898cb | 331 | else |
1e967e62 | 332 | argtype &= TYPMASK; |
451260e7 RH |
333 | if ( ( (xp->e_xtype&XTYPE) == XABS) |
334 | && !(xp->e_xtype&XFORW) | |
335 | && (xp->e_xvalue >= 0) | |
336 | && (xp->e_xvalue <= 63) | |
337 | && (xp->e_yvalue == 0) | |
1e967e62 RH |
338 | && (argtype != TYPF) |
339 | && (argtype != TYPD) ) { | |
451260e7 | 340 | ap->a_areg1 = xp->e_xvalue; |
cb3898cb BJ |
341 | break; |
342 | } | |
343 | } | |
451260e7 | 344 | ap->a_areg1 |= 0x8F; |
1e967e62 | 345 | reloc_how = argtype; |
5b3c350a | 346 | if (reloc_how == TYPD || reloc_how == TYPF){ |
451260e7 RH |
347 | if ( ((xp->e_xtype&XTYPE)==XABS) |
348 | && (!(xp->e_xtype&XFORW)) | |
cb3898cb BJ |
349 | && (slitflt(xp)) |
350 | ){ | |
5b3c350a | 351 | reloc_how = TYPNONE; |
451260e7 | 352 | ap->a_areg1=extlitflt(xp); |
cb3898cb | 353 | } |
cb3898cb BJ |
354 | } |
355 | break; | |
356 | ||
1e967e62 | 357 | } /*end of the switch on argtype*/ |
cb3898cb BJ |
358 | /* |
359 | * use the first byte to describe the argument | |
360 | */ | |
361 | #ifdef UNIX | |
451260e7 | 362 | outb(ap->a_areg1); |
cb3898cb BJ |
363 | #endif UNIX |
364 | #ifdef VMS | |
451260e7 RH |
365 | *vms_obj_ptr++ = -1; *vms_obj_ptr++ = (char)(ap->a_areg1); |
366 | dotp->e_xvalue += 1; | |
cb3898cb BJ |
367 | if ((vms_obj_ptr-sobuf) > 400) { |
368 | write(objfil,sobuf,vms_obj_ptr-sobuf); | |
369 | vms_obj_ptr=sobuf+1; | |
370 | } | |
371 | #endif VMS | |
5b3c350a RH |
372 | if (reloc_how != TYPNONE) |
373 | outrel(xp, reloc_how); | |
cb3898cb BJ |
374 | } /*end of the for to pick up all arguments*/ |
375 | } |