Commit | Line | Data |
---|---|---|
cb3898cb | 1 | /* Copyright (c) 1980 Regents of the University of California */ |
5b3c350a | 2 | static char sccsid[] = "@(#)ascode.c 4.5 %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; |
5b3c350a | 67 | switch( (fetcharg(ip, i-1)) & ACCESSMASK){ /* type of fp */ |
a264a1b2 RH |
68 | case ACCB: |
69 | if ( !((ap_type_mask == AEXP) || (ap_type_mask == AIMM)) ){ | |
70 | yyerror("arg %d, branch displacement must be an expression",i); | |
71 | return; | |
72 | } | |
73 | break; | |
74 | case ACCA: | |
75 | switch(ap_type_mask){ | |
76 | case AREG: yyerror("arg %d, addressing a register",i); | |
77 | return; | |
78 | case AIMM: if ( !(ap_type & ASTAR) ){ | |
79 | yyerror("arg %d, addressing an immediate operand",i); | |
80 | return; | |
81 | } | |
82 | } | |
83 | break; | |
84 | case ACCM: | |
85 | case ACCW: | |
86 | switch(ap_type_mask){ | |
87 | case AIMM: if (!(ap_type&ASTAR)) { | |
88 | yyerror("arg %d, modifying a constant",i); | |
89 | return; | |
90 | } | |
91 | } | |
92 | break; | |
93 | } /* end of the switch on fp_type */ | |
94 | if (ap_type & AINDX) { | |
95 | if (ap_walk->a_areg2==0xF) { | |
96 | yyerror("arg %d, PC used as index",i); | |
97 | return; | |
98 | } | |
99 | switch(ap_type_mask){ | |
100 | case AREG: yyerror("arg %d, indexing the register file",i); | |
101 | return; | |
102 | case AIMM: yyerror("arg %d, indexing a constant",i); | |
103 | return; | |
5b3c350a RH |
104 | case ADECR: |
105 | case AINCR: if (ap_walk->a_areg1==ap_walk->a_areg2) { | |
a264a1b2 RH |
106 | yyerror("arg %d, indexing with modified register",i); |
107 | return; | |
108 | } | |
109 | break; | |
110 | } /* end of switch on ap_type_mask */ | |
111 | } /* end of AINDX */ | |
112 | } | |
113 | } /* both passes here */ | |
cb3898cb BJ |
114 | if (jxxflg < 0) |
115 | ijxout(op, ap, nact); | |
116 | else putins(op, ap, nact); | |
117 | } | |
118 | ||
cb3898cb | 119 | extern int d124; |
cb3898cb BJ |
120 | |
121 | putins(op, ap, n) | |
122 | /* | |
123 | * n had better be positive | |
124 | */ | |
125 | register struct arg *ap; | |
126 | { | |
127 | register struct exp *xp; | |
128 | register int a; | |
5b3c350a RH |
129 | int i; |
130 | int reloc_how; | |
cb3898cb BJ |
131 | |
132 | #ifdef DEBUG | |
133 | fflush(stdout); | |
134 | #endif | |
135 | if (passno == 2) | |
136 | goto PASS2; | |
137 | ||
451260e7 RH |
138 | dotp->e_xvalue += n+1; /* 1 for the opcode, at least 1 per arg */ |
139 | for (i=0; i<n; i++,ap++) { /* some args take more than 1 byte */ | |
140 | a = ap->a_atype; | |
cb3898cb | 141 | if (a & AINDX) |
451260e7 | 142 | dotp->e_xvalue++; |
cb3898cb BJ |
143 | switch (a&~(AINDX|ASTAR)) { |
144 | case AEXP: | |
451260e7 | 145 | a = fetcharg(itab[op], i); |
cb3898cb BJ |
146 | if (a == ACCB+TYPB) |
147 | break; | |
148 | if (a==ACCB+TYPW){ | |
451260e7 | 149 | dotp->e_xvalue++; |
cb3898cb BJ |
150 | break; |
151 | } | |
152 | /* | |
153 | * Reduces to PC relative | |
154 | */ | |
451260e7 | 155 | dotp->e_xvalue += ap->a_dispsize; |
cb3898cb BJ |
156 | break; |
157 | ||
158 | case ADISP: | |
451260e7 RH |
159 | xp=ap->a_xp; |
160 | if ((xp->e_xtype&XTYPE)!=XABS || xp->e_xtype&XFORW){ | |
161 | dotp->e_xvalue += ap->a_dispsize; | |
cb3898cb BJ |
162 | break; |
163 | } | |
451260e7 | 164 | if (xp->e_xvalue==0 && !(a&ASTAR)) |
cb3898cb | 165 | break; |
451260e7 RH |
166 | dotp->e_xvalue++; |
167 | if ((xp->e_xvalue<MINBYTE) || (xp->e_xvalue>MAXBYTE)) | |
168 | dotp->e_xvalue++; | |
169 | if ((xp->e_xvalue<MINWORD) || (xp->e_xvalue>MAXWORD)) | |
170 | dotp->e_xvalue += 2; | |
cb3898cb BJ |
171 | break; |
172 | ||
173 | case AIMM: | |
451260e7 | 174 | if (ap->a_atype&ASTAR) a=TYPL; |
cb3898cb | 175 | else { |
451260e7 | 176 | a = fetcharg(itab[op], i); |
cb3898cb BJ |
177 | if (a&ACCA) |
178 | a = TYPL; | |
179 | else | |
180 | a &= TYPMASK; | |
451260e7 RH |
181 | xp = ap->a_xp; |
182 | if ( ((xp->e_xtype&XTYPE)==XABS) | |
183 | && (!(xp->e_xtype&XFORW)) | |
184 | && (xp->e_xvalue>=0) | |
185 | && (xp->e_xvalue<=63) | |
186 | && (xp->e_yvalue == 0) | |
cb3898cb BJ |
187 | && (a != TYPD) |
188 | && (a != TYPF) | |
189 | ) | |
190 | break; | |
191 | } | |
192 | switch (a) { | |
193 | case TYPD: | |
194 | case TYPF: | |
451260e7 RH |
195 | if ( !(((xp->e_xtype&XTYPE)==XABS) |
196 | && (!(xp->e_xtype&XFORW)) | |
cb3898cb BJ |
197 | && (slitflt(xp))) |
198 | ){ | |
199 | /* it is NOT short */ | |
451260e7 | 200 | dotp->e_xvalue += ((a==TYPF)? |
cb3898cb BJ |
201 | 4 : 8); |
202 | } | |
203 | break; | |
204 | case TYPQ: | |
451260e7 | 205 | dotp->e_xvalue += 8;break; |
cb3898cb | 206 | case TYPL: |
451260e7 | 207 | dotp->e_xvalue += 4;break; |
cb3898cb | 208 | case TYPW: |
451260e7 | 209 | dotp->e_xvalue += 2;break; |
cb3898cb | 210 | case TYPB: |
451260e7 | 211 | dotp->e_xvalue += 1;break; |
cb3898cb BJ |
212 | } /*end of the switch on a*/ |
213 | } /*end of the switch on the type*/ | |
214 | } /*end of looping for all arguments*/ | |
215 | return; | |
216 | ||
217 | PASS2: | |
218 | ||
219 | #ifdef UNIX | |
220 | outb(op); /* the opcode */ | |
221 | #endif UNIX | |
222 | #ifdef VMS | |
223 | *vms_obj_ptr++ = -1; *vms_obj_ptr++ = (char)op; | |
451260e7 | 224 | dotp->e_xvalue += 1; |
cb3898cb BJ |
225 | #endif VMS |
226 | ||
227 | for (i=0; i<n; i++,ap++) {/* now for the arguments */ | |
451260e7 RH |
228 | a=ap->a_atype; |
229 | xp=ap->a_xp; | |
5b3c350a | 230 | reloc_how = TYPNONE; |
cb3898cb BJ |
231 | if (a&AINDX) { |
232 | #ifdef UNIX | |
451260e7 | 233 | { outb(0x40 | ap->a_areg2); } |
cb3898cb BJ |
234 | #endif UNIX |
235 | #ifdef VMS | |
236 | { *vms_obj_ptr++ = -1; | |
451260e7 RH |
237 | *vms_obj_ptr++ = (0x40 | ap->a_areg2); |
238 | dotp->e_xvalue += 1; } | |
cb3898cb BJ |
239 | #endif VMS |
240 | a &= ~AINDX; | |
241 | } | |
242 | if (a&ASTAR) { | |
451260e7 | 243 | ap->a_areg1 |= 0x10; |
cb3898cb BJ |
244 | a &= ~ASTAR; |
245 | } | |
246 | switch (a) { | |
247 | case AREG: /* %r */ | |
451260e7 | 248 | ap->a_areg1 |= 0x50; |
cb3898cb BJ |
249 | break; |
250 | case ABASE: /* (%r) */ | |
451260e7 | 251 | ap->a_areg1 |= 0x60; |
cb3898cb BJ |
252 | break; |
253 | case ADECR: /* -(%r) */ | |
451260e7 | 254 | ap->a_areg1 |= 0x70; |
cb3898cb | 255 | break; |
593d71c1 | 256 | case AINCR: /* (%r)+ */ |
451260e7 | 257 | ap->a_areg1 |= 0x80; |
cb3898cb BJ |
258 | break; |
259 | case AEXP: /* expr */ | |
451260e7 | 260 | a = fetcharg(itab[op], i); |
cb3898cb | 261 | if (a == ACCB+TYPB) { |
451260e7 RH |
262 | ap->a_areg1 = a = |
263 | xp->e_xvalue - (dotp->e_xvalue + 1); | |
cb3898cb BJ |
264 | if (a<MINBYTE || a>MAXBYTE) |
265 | yyerror("Branch too far"); break; | |
266 | } | |
267 | if (a == ACCB+TYPW) { | |
451260e7 RH |
268 | ap->a_areg1 = a = xp->e_xvalue |
269 | -= dotp->e_xvalue + 2; | |
270 | xp->e_xtype = XABS; | |
cb3898cb BJ |
271 | if (a<MINWORD || a>MAXWORD) |
272 | yyerror("Branch too far"); | |
451260e7 | 273 | xp->e_xvalue = a>>8; |
5b3c350a | 274 | reloc_how = TYPB; |
cb3898cb BJ |
275 | break; |
276 | } | |
277 | /* reduces to expr(pc) mode */ | |
451260e7 | 278 | ap->a_areg1 |= (0xAF + mod124[ap->a_dispsize]); |
5b3c350a | 279 | reloc_how = type_124[ap->a_dispsize] + RELOC_PCREL; |
cb3898cb BJ |
280 | break; |
281 | ||
282 | case ADISP: /* expr(%r) */ | |
451260e7 RH |
283 | ap->a_areg1 |= 0xA0; |
284 | if ((xp->e_xtype&XTYPE)!=XABS || xp->e_xtype&XFORW){ | |
285 | ap->a_areg1 += mod124[ap->a_dispsize]; | |
5b3c350a | 286 | reloc_how = type_124[ap->a_dispsize]; |
cb3898cb BJ |
287 | break; |
288 | } | |
451260e7 RH |
289 | if (xp->e_xvalue==0 && !(ap->a_areg1&0x10)) { |
290 | ap->a_areg1 ^= 0xC0; | |
cb3898cb BJ |
291 | break; |
292 | } | |
5b3c350a | 293 | reloc_how = TYPB; |
451260e7 RH |
294 | if ((xp->e_xvalue<MINBYTE) || (xp->e_xvalue>MAXBYTE)){ |
295 | ap->a_areg1 += 0x20; | |
5b3c350a | 296 | reloc_how = TYPW; |
cb3898cb | 297 | } |
451260e7 RH |
298 | if ((xp->e_xvalue<MINWORD) || (xp->e_xvalue>MAXWORD)){ |
299 | ap->a_areg1 += 0x20; | |
5b3c350a | 300 | reloc_how = TYPL; |
cb3898cb BJ |
301 | } |
302 | break; | |
303 | ||
304 | case AIMM: /* $expr */ | |
451260e7 | 305 | if (ap->a_atype&ASTAR) |
cb3898cb BJ |
306 | a=TYPL; |
307 | else { | |
451260e7 | 308 | a = fetcharg(itab[op], i); |
cb3898cb BJ |
309 | if (a&ACCA) |
310 | a=TYPL; | |
311 | else | |
312 | a &= TYPMASK; | |
451260e7 RH |
313 | if ( ( (xp->e_xtype&XTYPE) == XABS) |
314 | && !(xp->e_xtype&XFORW) | |
315 | && (xp->e_xvalue >= 0) | |
316 | && (xp->e_xvalue <= 63) | |
317 | && (xp->e_yvalue == 0) | |
cb3898cb BJ |
318 | && (a != TYPF) |
319 | && (a != TYPD) ) { | |
451260e7 | 320 | ap->a_areg1 = xp->e_xvalue; |
cb3898cb BJ |
321 | break; |
322 | } | |
323 | } | |
451260e7 | 324 | ap->a_areg1 |= 0x8F; |
5b3c350a RH |
325 | reloc_how = a; |
326 | if (reloc_how == TYPD || reloc_how == TYPF){ | |
451260e7 RH |
327 | if ( ((xp->e_xtype&XTYPE)==XABS) |
328 | && (!(xp->e_xtype&XFORW)) | |
cb3898cb BJ |
329 | && (slitflt(xp)) |
330 | ){ | |
5b3c350a | 331 | reloc_how = TYPNONE; |
451260e7 | 332 | ap->a_areg1=extlitflt(xp); |
cb3898cb | 333 | } |
cb3898cb BJ |
334 | } |
335 | break; | |
336 | ||
337 | } /*end of the switch on a*/ | |
338 | /* | |
339 | * use the first byte to describe the argument | |
340 | */ | |
341 | #ifdef UNIX | |
451260e7 | 342 | outb(ap->a_areg1); |
cb3898cb BJ |
343 | #endif UNIX |
344 | #ifdef VMS | |
451260e7 RH |
345 | *vms_obj_ptr++ = -1; *vms_obj_ptr++ = (char)(ap->a_areg1); |
346 | dotp->e_xvalue += 1; | |
cb3898cb BJ |
347 | if ((vms_obj_ptr-sobuf) > 400) { |
348 | write(objfil,sobuf,vms_obj_ptr-sobuf); | |
349 | vms_obj_ptr=sobuf+1; | |
350 | } | |
351 | #endif VMS | |
5b3c350a RH |
352 | if (reloc_how != TYPNONE) |
353 | outrel(xp, reloc_how); | |
cb3898cb BJ |
354 | } /*end of the for to pick up all arguments*/ |
355 | } |