source: trunk/libs/newlib/src/include/opcode/pyr.h @ 684

Last change on this file since 684 was 444, checked in by satin@…, 7 years ago

add newlib,libalmos-mkh, restructure shared_syscalls.h and mini-libc
File size: 11.7 KB
RevLine 
[444]1/* pyramid.opcode.h -- gdb initial attempt.
2
3   Copyright 2001, 2010 Free Software Foundation, Inc.
4   
5   This program is free software; you can redistribute it and/or modify
6   it under the terms of the GNU General Public License as published by
7   the Free Software Foundation; either version 3, or (at your option)
8   any later version.
9
10   This program is distributed in the hope that it will be useful,
11   but WITHOUT ANY WARRANTY; without even the implied warranty of
12   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
13   GNU General Public License for more details.
14
15   You should have received a copy of the GNU General Public License
16   along with this program; if not, write to the Free Software
17   Foundation, Inc., 51 Franklin Street - Fifth Floor,
18   Boston, MA 02110-1301, USA.  */
19   
20/* pyramid opcode table: wot to do with this
21   particular opcode */
22
23struct pyr_datum
24{
25  char              nargs;
26  char *            args;       /* how to compile said opcode */
27  unsigned long     mask;       /* Bit vector: which operand modes are valid
28                                   for this opcode */
29  unsigned char     code;       /* op-code (always 6(?) bits */
30};
31
32typedef struct pyr_insn_format
33{
34    unsigned int mode :4;
35    unsigned int operator :8;
36    unsigned int index_scale :2;
37    unsigned int index_reg :6;
38    unsigned int operand_1 :6;
39    unsigned int operand_2:6;
40} pyr_insn_format;
41       
42
43/* We store four bytes of opcode for all opcodes.
44   Pyramid is sufficiently RISCy that:
45      - insns are always an integral number of words;
46      - the length of any insn can be told from the first word of
47        the insn. (ie, if there are zero, one, or two words of
48        immediate operand/offset).
49
50   
51   The args component is a string containing two characters for each
52   operand of the instruction.  The first specifies the kind of operand;
53   the second, the place it is stored. */
54
55/* Kinds of operands:
56   mask  assembler syntax       description
57   0x0001:  movw Rn,Rn          register to register
58   0x0002:  movw K,Rn           quick immediate to register
59   0x0004:  movw I,Rn           long immediate to register
60   0x0008:  movw (Rn),Rn        register indirect to register
61            movw (Rn)[x],Rn     register indirect to register
62   0x0010:  movw I(Rn),Rn       offset register indirect to register
63            movw I(Rn)[x],Rn    offset register indirect, indexed, to register
64
65   0x0020:  movw Rn,(Rn)        register to register indirect               
66   0x0040:  movw K,(Rn)         quick immediate to register indirect         
67   0x0080:  movw I,(Rn)         long immediate to register indirect         
68   0x0100:  movw (Rn),(Rn)      register indirect to-register indirect       
69   0x0100:  movw (Rn),(Rn)      register indirect to-register indirect       
70   0x0200:  movw I(Rn),(Rn)     register indirect+offset to register indirect
71   0x0200:  movw I(Rn),(Rn)     register indirect+offset to register indirect
72
73   0x0400:  movw Rn,I(Rn)       register to register indirect+offset
74   0x0800:  movw K,I(Rn)        quick immediate to register indirect+offset
75   0x1000:  movw I,I(Rn)        long immediate to register indirect+offset
76   0x1000:  movw (Rn),I(Rn)     register indirect to-register indirect+offset
77   0x1000:  movw I(Rn),I(Rn)    register indirect+offset to register indirect
78                                        +offset
79   0x0000:  (irregular)         ???
80   
81
82   Each insn has a four-bit field encoding the type(s) of its operands.
83*/
84
85/* Some common combinations
86   */
87
88/* the first 5,(0x1|0x2|0x4|0x8|0x10) ie (1|2|4|8|16), ie ( 32 -1)*/
89#define GEN_TO_REG (31)
90
91#define UNKNOWN ((unsigned long)-1)
92#define ANY (GEN_TO_REG | (GEN_TO_REG << 5) | (GEN_TO_REG << 15))
93
94#define CONVERT (1|8|0x10|0x20|0x200)
95
96#define K_TO_REG (2)
97#define I_TO_REG (4)
98#define NOTK_TO_REG (GEN_TO_REG & ~K_TO_REG)
99#define NOTI_TO_REG (GEN_TO_REG & ~I_TO_REG)
100
101/* The assembler requires that this array be sorted as follows:
102   all instances of the same mnemonic must be consecutive.
103   All instances of the same mnemonic with the same number of operands
104   must be consecutive.
105 */
106
107struct pyr_opcode               /* pyr opcode text */
108{
109  char *            name;       /* opcode name: lowercase string  [key]  */
110  struct pyr_datum  datum;      /* rest of opcode table          [datum] */
111};
112
113#define pyr_how args
114#define pyr_nargs nargs
115#define pyr_mask mask
116#define pyr_name name
117
118struct pyr_opcode pyr_opcodes[] =
119{
120  {"movb",      { 2, "", UNKNOWN,               0x11}, },
121  {"movh",      { 2, "", UNKNOWN,               0x12} },
122  {"movw",      { 2, "", ANY,                   0x10} },
123  {"movl",      { 2, "", ANY,                   0x13} },
124  {"mnegw",     { 2, "", (0x1|0x8|0x10),        0x14} },
125  {"mnegf",     { 2, "", 0x1,                   0x15} },
126  {"mnegd",     { 2, "", 0x1,                   0x16} },
127  {"mcomw",     { 2, "", (0x1|0x8|0x10),        0x17} },
128  {"mabsw",     { 2, "", (0x1|0x8|0x10),        0x18} },
129  {"mabsf",     { 2, "", 0x1,                   0x19} },
130  {"mabsd",     { 2, "", 0x1,                   0x1a} },
131  {"mtstw",     { 2, "", (0x1|0x8|0x10),        0x1c} },
132  {"mtstf",     { 2, "", 0x1,                   0x1d} },
133  {"mtstd",     { 2, "", 0x1,                   0x1e} },
134  {"mova",      { 2, "", 0x8|0x10,              0x1f} },
135  {"movzbw",    { 2, "", (0x1|0x8|0x10),        0x20} },
136  {"movzhw",    { 2, "", (0x1|0x8|0x10),        0x21} },
137                                /* 2 insns out of order here */
138  {"movbl",     { 2, "", 1,                     0x4f} },
139  {"filbl",     { 2, "", 1,                     0x4e} },
140
141  {"cvtbw",     { 2, "", CONVERT,               0x22} },
142  {"cvthw",     { 2, "", CONVERT,               0x23} },
143  {"cvtwb",     { 2, "", CONVERT,               0x24} },
144  {"cvtwh",     { 2, "", CONVERT,               0x25} },
145  {"cvtwf",     { 2, "", CONVERT,               0x26} },
146  {"cvtwd",     { 2, "", CONVERT,               0x27} },
147  {"cvtfw",     { 2, "", CONVERT,               0x28} },
148  {"cvtfd",     { 2, "", CONVERT,               0x29} },
149  {"cvtdw",     { 2, "", CONVERT,               0x2a} },
150  {"cvtdf",     { 2, "", CONVERT,               0x2b} },
151
152  {"addw",      { 2, "", GEN_TO_REG,            0x40} },
153  {"addwc",     { 2, "", GEN_TO_REG,            0x41} },
154  {"subw",      { 2, "", GEN_TO_REG,            0x42} },
155  {"subwb",     { 2, "", GEN_TO_REG,            0x43} },
156  {"rsubw",     { 2, "", GEN_TO_REG,            0x44} },
157  {"mulw",      { 2, "", GEN_TO_REG,            0x45} },
158  {"emul",      { 2, "", GEN_TO_REG,            0x47} },
159  {"umulw",     { 2, "", GEN_TO_REG,            0x46} },
160  {"divw",      { 2, "", GEN_TO_REG,            0x48} },
161  {"ediv",      { 2, "", GEN_TO_REG,            0x4a} },
162  {"rdivw",     { 2, "", GEN_TO_REG,            0x4b} },
163  {"udivw",     { 2, "", GEN_TO_REG,            0x49} },
164  {"modw",      { 2, "", GEN_TO_REG,            0x4c} },
165  {"umodw",     { 2, "", GEN_TO_REG,            0x4d} },
166
167
168  {"addf",      { 2, "", 1,                     0x50} },
169  {"addd",      { 2, "", 1,                     0x51} },
170  {"subf",      { 2, "", 1,                     0x52} },
171  {"subd",      { 2, "", 1,                     0x53} },
172  {"mulf",      { 2, "", 1,                     0x56} },
173  {"muld",      { 2, "", 1,                     0x57} },
174  {"divf",      { 2, "", 1,                     0x58} },
175  {"divd",      { 2, "", 1,                     0x59} },
176
177
178  {"cmpb",      { 2, "", UNKNOWN,               0x61} },
179  {"cmph",      { 2, "", UNKNOWN,               0x62} },
180  {"cmpw",      { 2, "", UNKNOWN,               0x60} },
181  {"ucmpb",     { 2, "", UNKNOWN,               0x66} },
182  /* WHY no "ucmph"??? */
183  {"ucmpw",     { 2, "", UNKNOWN,               0x65} },
184  {"xchw",      { 2, "", UNKNOWN,               0x0f} },
185
186
187  {"andw",      { 2, "", GEN_TO_REG,            0x30} },
188  {"orw",       { 2, "", GEN_TO_REG,            0x31} },
189  {"xorw",      { 2, "", GEN_TO_REG,            0x32} },
190  {"bicw",      { 2, "", GEN_TO_REG,            0x33} },
191  {"lshlw",     { 2, "", GEN_TO_REG,            0x38} },
192  {"ashlw",     { 2, "", GEN_TO_REG,            0x3a} },
193  {"ashll",     { 2, "", GEN_TO_REG,            0x3c} },
194  {"ashrw",     { 2, "", GEN_TO_REG,            0x3b} },
195  {"ashrl",     { 2, "", GEN_TO_REG,            0x3d} },
196  {"rotlw",     { 2, "", GEN_TO_REG,            0x3e} },
197  {"rotrw",     { 2, "", GEN_TO_REG,            0x3f} },
198
199  /* push and pop insns are "going away next release". */
200  {"pushw",     { 2, "", GEN_TO_REG,            0x0c} },
201  {"popw",      { 2, "", (0x1|0x8|0x10),        0x0d} },
202  {"pusha",     { 2, "", (0x8|0x10),            0x0e} },
203
204  {"bitsw",     { 2, "", UNKNOWN,               0x35} },
205  {"bitcw",     { 2, "", UNKNOWN,               0x36} },
206  /* some kind of ibra/dbra insns??*/
207  {"icmpw",     { 2, "", UNKNOWN,               0x67} },
208  {"dcmpw",     { 2, "", (1|4|0x20|0x80|0x400|0x1000),  0x69} },/*FIXME*/
209  {"acmpw",     { 2, "", 1,                     0x6b} },
210
211  /* Call is written as a 1-op insn, but is always (dis)assembled as a 2-op
212     insn with a 2nd op of tr14.   The assembler will have to grok this.  */
213  {"call",      { 2, "", GEN_TO_REG,            0x04} },
214  {"call",      { 1, "", GEN_TO_REG,            0x04} },
215
216  {"callk",     { 1, "", UNKNOWN,               0x06} },/* system call?*/
217  /* Ret is usually written as a 0-op insn, but gets disassembled as a
218     1-op insn. The operand is always tr15. */
219  {"ret",       { 0, "", UNKNOWN,               0x09} },
220  {"ret",       { 1, "", UNKNOWN,               0x09} },
221  {"adsf",      { 2, "", (1|2|4),               0x08} },
222  {"retd",      { 2, "", UNKNOWN,               0x0a} },
223  {"btc",       { 2, "", UNKNOWN,               0x01} },
224  {"bfc",       { 2, "", UNKNOWN,               0x02} },
225  /* Careful: halt is 0x00000000. Jump must have some other (mode?)bit set?? */
226  {"jump",      { 1, "", UNKNOWN,               0x00} },
227  {"btp",       { 2, "", UNKNOWN,               0xf00} },
228  /* read control-stack pointer is another 1-or-2 operand insn. */
229  {"rcsp",      { 2, "", UNKNOWN,               0x01f} },
230  {"rcsp",      { 1, "", UNKNOWN,               0x01f} }
231};
232
233/* end: pyramid.opcode.h */
234/* One day I will have to take the time to find out what operands
235   are valid for these insns, and guess at what they mean.
236
237   I can't imagine what the "I???" insns (iglob, etc) do.
238
239   the arithmetic-sounding insns ending in "p" sound awfully like BCD
240   arithmetic insns:
241        dshlp -> Decimal SHift Left Packed
242        dshrp -> Decimal SHift Right Packed
243   and cvtlp would be convert long to packed.
244   I have no idea how the operands are interpreted; but having them be
245   a long register with (address, length) of an in-memory packed BCD operand
246   would not be surprising.
247   They are unlikely to be a packed bcd string: 64 bits of long give
248   is only 15 digits+sign, which isn't enough for COBOL.
249 */ 
250#if 0
251  {"wcsp",      { 2, "", UNKNOWN,               0x00} }, /*write csp?*/
252  /* The OSx Operating System Porting Guide claims SSL does things
253     with tr12 (a register reserved to it) to do with static block-structure
254     references.  SSL=Set Static Link?  It's "Going away next release". */
255  {"ssl",       { 2, "", UNKNOWN,               0x00} },
256  {"ccmps",     { 2, "", UNKNOWN,               0x00} },
257  {"lcd",       { 2, "", UNKNOWN,               0x00} },
258  {"uemul",     { 2, "", UNKNOWN,               0x00} }, /*unsigned emul*/
259  {"srf",       { 2, "", UNKNOWN,               0x00} }, /*Gidget time???*/
260  {"mnegp",     { 2, "", UNKNOWN,               0x00} }, /move-neg phys?*/
261  {"ldp",       { 2, "", UNKNOWN,               0x00} }, /*load phys?*/
262  {"ldti",      { 2, "", UNKNOWN,               0x00} },
263  {"ldb",       { 2, "", UNKNOWN,               0x00} },
264  {"stp",       { 2, "", UNKNOWN,               0x00} },
265  {"stti",      { 2, "", UNKNOWN,               0x00} },
266  {"stb",       { 2, "", UNKNOWN,               0x00} },
267  {"stu",       { 2, "", UNKNOWN,               0x00} },
268  {"addp",      { 2, "", UNKNOWN,               0x00} },
269  {"subp",      { 2, "", UNKNOWN,               0x00} },
270  {"mulp",      { 2, "", UNKNOWN,               0x00} },
271  {"divp",      { 2, "", UNKNOWN,               0x00} },
272  {"dshlp",     { 2, "", UNKNOWN,               0x00} },  /* dec shl packed? */
273  {"dshrp",     { 2, "", UNKNOWN,               0x00} }, /* dec shr packed? */
274  {"movs",      { 2, "", UNKNOWN,               0x00} }, /*move (string?)?*/
275  {"cmpp",      { 2, "", UNKNOWN,               0x00} }, /* cmp phys?*/
276  {"cmps",      { 2, "", UNKNOWN,               0x00} }, /* cmp (string?)?*/
277  {"cvtlp",     { 2, "", UNKNOWN,               0x00} }, /* cvt long to p??*/
278  {"cvtpl",     { 2, "", UNKNOWN,               0x00} }, /* cvt p to l??*/
279  {"dintr",     { 2, "", UNKNOWN,               0x00} }, /* ?? intr ?*/
280  {"rphysw",    { 2, "", UNKNOWN,               0x00} }, /* read phys word?*/
281  {"wphysw",    { 2, "", UNKNOWN,               0x00} }, /* write phys word?*/
282  {"cmovs",     { 2, "", UNKNOWN,               0x00} },
283  {"rsubw",     { 2, "", UNKNOWN,               0x00} },
284  {"bicpsw",    { 2, "", UNKNOWN,               0x00} }, /* clr bit in psw? */
285  {"bispsw",    { 2, "", UNKNOWN,               0x00} }, /* set bit in psw? */
286  {"eio",       { 2, "", UNKNOWN,               0x00} }, /* ?? ?io ? */
287  {"callp",     { 2, "", UNKNOWN,               0x00} }, /* call phys?*/
288  {"callr",     { 2, "", UNKNOWN,               0x00} },
289  {"lpcxt",     { 2, "", UNKNOWN,               0x00} }, /*load proc context*/
290  {"rei",       { 2, "", UNKNOWN,               0x00} }, /*ret from intrpt*/
291  {"rport",     { 2, "", UNKNOWN,               0x00} }, /*read-port?*/
292  {"rtod",      { 2, "", UNKNOWN,               0x00} }, /*read-time-of-day?*/
293  {"ssi",       { 2, "", UNKNOWN,               0x00} },
294  {"vtpa",      { 2, "", UNKNOWN,               0x00} }, /*virt-to-phys-addr?*/
295  {"wicl",      { 2, "", UNKNOWN,               0x00} }, /* write icl ? */
296  {"wport",     { 2, "", UNKNOWN,               0x00} }, /*write-port?*/
297  {"wtod",      { 2, "", UNKNOWN,               0x00} }, /*write-time-of-day?*/
298  {"flic",      { 2, "", UNKNOWN,               0x00} },
299  {"iglob",     { 2, "", UNKNOWN,               0x00} }, /* I global? */
300  {"iphys",     { 2, "", UNKNOWN,               0x00} }, /* I physical? */
301  {"ipid",      { 2, "", UNKNOWN,               0x00} }, /* I pid? */
302  {"ivect",     { 2, "", UNKNOWN,               0x00} }, /* I vector? */
303  {"lamst",     { 2, "", UNKNOWN,               0x00} },
304  {"tio",       { 2, "", UNKNOWN,               0x00} },
305#endif
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