1 /* tc-z8k.c -- Assemble code for the Zilog Z800n
2 Copyright (C) 1992, 93, 94, 95, 96, 97, 98, 99, 2000
3 Free Software Foundation.
5 This file is part of GAS, the GNU Assembler.
7 GAS is free software; you can redistribute it and/or modify
8 it under the terms of the GNU General Public License as published by
9 the Free Software Foundation; either version 2, or (at your option)
12 GAS is distributed in the hope that it will be useful,
13 but WITHOUT ANY WARRANTY; without even the implied warranty of
14 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
15 GNU General Public License for more details.
17 You should have received a copy of the GNU General Public License
18 along with GAS; see the file COPYING. If not, write to the Free
19 Software Foundation, 59 Temple Place - Suite 330, Boston, MA
23 Written By Steve Chamberlain
29 #include "opcodes/z8k-opc.h"
35 const char comment_chars
[] = "!";
36 const char line_comment_chars
[] = "#";
37 const char line_separator_chars
[] = ";";
40 extern int coff_flags
;
42 const int md_reloc_size
;
44 /* This table describes all the machine specific pseudo-ops the assembler
45 has to support. The fields are:
46 pseudo-op name without dot
47 function to call to execute this pseudo-op
48 Integer arg to pass to the function
57 machine
= bfd_mach_z8001
;
65 machine
= bfd_mach_z8002
;
74 record_alignment (now_seg
, 1);
77 void obj_coff_section ();
95 if (*input_line_pointer
== '\'')
99 c
= *input_line_pointer
++;
104 c
= (tohex (input_line_pointer
[0]) << 4)
105 | tohex (input_line_pointer
[1]);
106 input_line_pointer
+= 2;
108 FRAG_APPEND_1_CHAR (c
);
109 c
= *input_line_pointer
++;
111 demand_empty_rest_of_line ();
115 const pseudo_typeS md_pseudo_table
[] =
121 {"form", listing_psize
, 0},
122 {"heading", listing_title
, 0},
123 {"import", s_ignore
, 0},
124 {"page", listing_eject
, 0},
125 {"program", s_ignore
, 0},
126 {"z8001", s_segm
, 0},
127 {"z8002", s_unseg
, 0},
131 {"unsegm", s_unseg
, 0},
132 {"unseg", s_unseg
, 0},
133 {"name", s_app_file
, 0},
134 {"global", s_globl
, 0},
139 {"rsect", obj_coff_section
, 0},
140 {"sect", obj_coff_section
, 0},
141 {"block", s_space
, 0},
146 const char EXP_CHARS
[] = "eE";
148 /* Chars that mean this number is a floating point constant */
151 const char FLT_CHARS
[] = "rRsSfFdDxXpP";
153 static struct hash_control
*opcode_hash_control
; /* Opcode mnemonics */
158 opcode_entry_type
*opcode
;
159 char *prev_name
= "";
162 opcode_hash_control
= hash_new ();
164 for (opcode
= z8k_table
; opcode
->name
; opcode
++)
166 /* Only enter unique codes into the table */
167 char *src
= opcode
->name
;
169 if (strcmp (opcode
->name
, prev_name
))
171 hash_insert (opcode_hash_control
, opcode
->name
, (char *) opcode
);
175 prev_name
= opcode
->name
;
178 /* default to z8002 */
181 /* insert the pseudo ops too */
182 for (idx
= 0; md_pseudo_table
[idx
].poc_name
; idx
++)
184 opcode_entry_type
*fake_opcode
;
185 fake_opcode
= (opcode_entry_type
*) malloc (sizeof (opcode_entry_type
));
186 fake_opcode
->name
= md_pseudo_table
[idx
].poc_name
,
187 fake_opcode
->func
= (void *) (md_pseudo_table
+ idx
);
188 fake_opcode
->opcode
= 250;
189 hash_insert (opcode_hash_control
, fake_opcode
->name
, fake_opcode
);
201 typedef struct z8k_op
203 char regsize
; /* 'b','w','r','q' */
204 unsigned int reg
; /* 0..15 */
208 unsigned int x_reg
; /* any other register associated with the mode */
209 expressionS exp
; /* any expression */
214 static expressionS
*da_operand
;
215 static expressionS
*imm_operand
;
228 if (isdigit (src
[1]))
230 *reg
= (src
[0] - '0') * 10 + src
[1] - '0';
235 *reg
= (src
[0] - '0');
247 WREG r0,r1,r2,r3,r4,r5,r6,r7,fp,sp
256 /* Try to parse a reg name. Return a pointer to the first character
257 in SRC after the reg name. */
260 parse_reg (src
, mode
, reg
)
268 if (src
[0] == 's' && src
[1] == 'p')
272 *mode
= CLASS_REG_LONG
;
277 *mode
= CLASS_REG_WORD
;
286 *mode
= CLASS_REG_LONG
;
287 res
= whatreg (reg
, src
+ 2);
290 as_warn (_("register rr%d, out of range."),regno
);
292 else if (src
[1] == 'h')
294 *mode
= CLASS_REG_BYTE
;
295 res
= whatreg (reg
, src
+ 2);
298 as_warn (_("register rh%d, out of range."),regno
);
300 else if (src
[1] == 'l')
302 *mode
= CLASS_REG_BYTE
;
303 res
= whatreg (reg
, src
+ 2);
306 as_warn (_("register rl%d, out of range."),regno
);
309 else if (src
[1] == 'q')
311 *mode
= CLASS_REG_QUAD
;
312 res
= whatreg (reg
, src
+ 2);
315 as_warn (_("register rq%d, out of range."),regno
);
319 *mode
= CLASS_REG_WORD
;
320 res
= whatreg (reg
, src
+ 1);
323 as_warn (_("register r%d, out of range."),regno
);
335 char *save
= input_line_pointer
;
338 input_line_pointer
= s
;
340 if (op
->X_op
== O_absent
)
341 as_bad (_("missing operand"));
342 new = input_line_pointer
;
343 input_line_pointer
= save
;
347 /* The many forms of operand:
374 as_bad (_("expected %c"), what
);
379 /* Make sure the mode supplied is the size of a word */
381 regword (mode
, string
)
390 as_bad (_("register is wrong size for a word %s"), string
);
394 /* Make sure the mode supplied is the size of an address */
396 regaddr (mode
, string
)
402 ok
= segmented_mode
? CLASS_REG_LONG
: CLASS_REG_WORD
;
405 as_bad (_("register is wrong size for address %s"), string
);
415 struct ctrl_names ctrl_table
[] =
429 get_ctrl_operand (ptr
, mode
, dst
)
441 mode
->mode
= CLASS_CTRL
;
442 for (i
= 0; ctrl_table
[i
].name
; i
++)
446 for (j
= 0; ctrl_table
[i
].name
[j
]; j
++)
448 if (ctrl_table
[i
].name
[j
] != src
[j
])
451 the_ctrl
= ctrl_table
[i
].value
;
467 struct flag_names flag_table
[] =
479 get_flags_operand (ptr
, mode
, dst
)
492 mode
->mode
= CLASS_FLAGS
;
494 for (j
= 0; j
<= 9; j
++)
498 for (i
= 0; flag_table
[i
].name
; i
++)
500 if (flag_table
[i
].name
[0] == src
[j
])
502 the_flags
= the_flags
| flag_table
[i
].value
;
516 struct interrupt_names
523 struct interrupt_names intr_table
[] =
533 get_interrupt_operand (ptr
, mode
, dst
)
545 mode
->mode
= CLASS_IMM
;
546 for (i
= 0; intr_table
[i
].name
; i
++)
550 for (j
= 0; intr_table
[i
].name
[j
]; j
++)
552 if (intr_table
[i
].name
[j
] != src
[j
])
555 the_interrupt
= intr_table
[i
].value
;
571 struct cc_names table
[] =
599 get_cc_operand (ptr
, mode
, dst
)
611 mode
->mode
= CLASS_CC
;
612 for (i
= 0; table
[i
].name
; i
++)
616 for (j
= 0; table
[i
].name
[j
]; j
++)
618 if (table
[i
].name
[j
] != src
[j
])
621 the_cc
= table
[i
].value
;
630 get_operand (ptr
, mode
, dst
)
647 mode
->mode
= CLASS_IMM
;
648 imm_operand
= &(mode
->exp
);
649 src
= parse_exp (src
+ 1, &(mode
->exp
));
651 else if (*src
== '@')
655 mode
->mode
= CLASS_IR
;
656 src
= parse_reg (src
+ 1, &d
, &mode
->reg
);
662 end
= parse_reg (src
, &mode
->mode
, ®n
);
672 end
= parse_reg (src
, &nw
, &nr
);
680 as_bad (_("Missing ) in ra(rb)"));
687 regaddr (mode
->mode
, "ra(rb) ra");
688 /* regword (mode->mode, "ra(rb) rb");*/
689 mode
->mode
= CLASS_BX
;
699 src
= parse_exp (src
, &(mode
->exp
));
700 src
= checkfor (src
, ')');
701 mode
->mode
= CLASS_BA
;
704 imm_operand
= &(mode
->exp
);
716 src
= parse_exp (src
, &(mode
->exp
));
720 end
= parse_reg (src
, &(mode
->mode
), ®n
);
721 regword (mode
->mode
, "addr(Ra) ra");
722 mode
->mode
= CLASS_X
;
725 da_operand
= &(mode
->exp
);
726 src
= checkfor (end
, ')');
730 /* Just an address */
731 mode
->mode
= CLASS_DA
;
734 da_operand
= &(mode
->exp
);
743 get_operands (opcode
, op_end
, operand
)
744 opcode_entry_type
*opcode
;
750 switch (opcode
->noperands
)
759 if (opcode
->arg_info
[0] == CLASS_CC
)
761 get_cc_operand (&ptr
, operand
+ 0, 0);
763 else if (opcode
->arg_info
[0] == CLASS_FLAGS
)
765 get_flags_operand (&ptr
, operand
+ 0, 0);
767 else if (opcode
->arg_info
[0] == (CLASS_IMM
+(ARG_IMM2
)))
769 get_interrupt_operand (&ptr
, operand
+ 0, 0);
773 get_operand (&ptr
, operand
+ 0, 0);
781 if (opcode
->arg_info
[0] == CLASS_CC
)
783 get_cc_operand (&ptr
, operand
+ 0, 0);
785 else if (opcode
->arg_info
[0] == CLASS_CTRL
)
787 get_ctrl_operand (&ptr
, operand
+ 0, 0);
791 get_operand (&ptr
, operand
+ 0, 0);
796 get_ctrl_operand (&ptr
, operand
+ 1, 1);
802 get_operand (&ptr
, operand
+ 0, 0);
808 get_operand (&ptr
, operand
+ 1, 1);
813 get_operand (&ptr
, operand
+ 0, 0);
816 get_operand (&ptr
, operand
+ 1, 1);
819 get_operand (&ptr
, operand
+ 2, 2);
824 get_operand (&ptr
, operand
+ 0, 0);
827 get_operand (&ptr
, operand
+ 1, 1);
830 get_operand (&ptr
, operand
+ 2, 2);
833 get_cc_operand (&ptr
, operand
+ 3, 3);
842 /* Passed a pointer to a list of opcodes which use different
843 addressing modes, return the opcode which matches the opcodes
849 get_specific (opcode
, operands
)
850 opcode_entry_type
*opcode
;
854 opcode_entry_type
*this_try
= opcode
;
856 unsigned int noperands
= opcode
->noperands
;
858 unsigned int dispreg
;
859 unsigned int this_index
= opcode
->idx
;
861 while (this_index
== opcode
->idx
&& !found
)
866 for (i
= 0; i
< noperands
; i
++)
868 int mode
= operands
[i
].mode
;
870 if ((mode
& CLASS_MASK
) != (this_try
->arg_info
[i
] & CLASS_MASK
))
872 /* it could be an pc rel operand, if this is a da mode and
873 we like disps, then insert it */
875 if (mode
== CLASS_DA
&& this_try
->arg_info
[i
] == CLASS_DISP
)
877 /* This is the case */
878 operands
[i
].mode
= CLASS_DISP
;
880 else if (mode
== CLASS_BA
&& this_try
->arg_info
[i
])
882 /* Can't think of a way to turn what we've been given into
883 something that's ok */
886 else if (this_try
->arg_info
[i
] & CLASS_PR
)
888 if (mode
== CLASS_REG_LONG
&& segmented_mode
)
892 else if (mode
== CLASS_REG_WORD
&& !segmented_mode
)
902 switch (mode
& CLASS_MASK
)
917 reg
[this_try
->arg_info
[i
] & ARG_MASK
] = operands
[i
].reg
;
932 check_operand (operand
, width
, string
)
933 struct z8k_op
*operand
;
937 if (operand
->exp
.X_add_symbol
== 0
938 && operand
->exp
.X_op_symbol
== 0)
941 /* No symbol involved, let's look at offset, it's dangerous if any of
942 the high bits are not 0 or ff's, find out by oring or anding with
943 the width and seeing if the answer is 0 or all fs*/
944 if ((operand
->exp
.X_add_number
& ~width
) != 0 &&
945 (operand
->exp
.X_add_number
| width
) != (~0))
947 as_warn (_("operand %s0x%x out of range."), string
, operand
->exp
.X_add_number
);
953 static char buffer
[20];
956 newfix (ptr
, type
, operand
)
959 expressionS
*operand
;
961 if (operand
->X_add_symbol
962 || operand
->X_op_symbol
963 || operand
->X_add_number
)
965 fix_new_exp (frag_now
,
975 apply_fix (ptr
, type
, operand
, size
)
978 expressionS
*operand
;
981 int n
= operand
->X_add_number
;
983 operand
->X_add_number
= n
;
984 newfix ((ptr
- buffer
) / 2, type
, operand
);
988 case 8: /* 8 nibbles == 32 bits */
993 case 4: /* 4 niblles == 16 bits */
1007 /* Now we know what sort of opcodes it is, lets build the bytes -
1009 #define INSERT(x,y) *x++ = y>>24; *x++ = y>> 16; *x++=y>>8; *x++ =y;
1011 build_bytes (this_try
, operand
)
1012 opcode_entry_type
* this_try
;
1013 struct z8k_op
*operand
;
1019 char *output_ptr
= buffer
;
1025 unsigned int *class_ptr
;
1027 frag_wane (frag_now
);
1030 memset (buffer
, 20, 0);
1031 class_ptr
= this_try
->byte_info
;
1034 for (nibble
= 0; c
= *class_ptr
++; nibble
++)
1037 switch (c
& CLASS_MASK
)
1043 /* Direct address, we don't cope with the SS mode right now */
1046 da_operand
->X_add_number
|= 0x80000000;
1047 output_ptr
= apply_fix (output_ptr
, R_IMM32
, da_operand
, 8);
1051 output_ptr
= apply_fix (output_ptr
, R_IMM16
, da_operand
, 4);
1057 output_ptr
= apply_fix (output_ptr
, R_JR
, da_operand
, 2);
1064 output_ptr
= apply_fix (output_ptr
, R_DISP7
, da_operand
, 2);
1071 output_ptr
= apply_fix (output_ptr
, R_DISP7
, da_operand
, 2);
1072 output_ptr
[-2] = 0x8;
1076 case CLASS_BIT_1OR2
:
1077 *output_ptr
= c
& 0xf;
1080 if (imm_operand
->X_add_number
== 2)
1084 else if (imm_operand
->X_add_number
!= 1)
1086 as_bad (_("immediate must be 1 or 2"));
1091 as_bad (_("immediate 1 or 2 expected"));
1096 *output_ptr
++ = the_cc
;
1099 *output_ptr
++ = the_ctrl
;
1102 *output_ptr
++ = the_ctrl
| 0x8;
1105 *output_ptr
++ = (~the_interrupt
& 0x3);
1108 *output_ptr
++ = (~the_interrupt
& 0x3) | 0x4;
1111 *output_ptr
++ = the_flags
;
1114 *output_ptr
++ = c
& 0xf;
1117 if (reg
[c
& 0xf] == 0)
1119 as_bad (_("can't use R0 here"));
1122 case CLASS_REG_BYTE
:
1123 case CLASS_REG_WORD
:
1124 case CLASS_REG_LONG
:
1125 case CLASS_REG_QUAD
:
1126 /* Insert bit mattern of
1128 *output_ptr
++ = reg
[c
& 0xf];
1131 output_ptr
= apply_fix (output_ptr
, R_IMM16
, da_operand
, 4);
1138 switch (c
& ARG_MASK
)
1141 output_ptr
= apply_fix (output_ptr
, R_IMM4L
, imm_operand
, 1);
1144 imm_operand
->X_add_number
--;
1145 output_ptr
= apply_fix (output_ptr
, R_IMM4L
, imm_operand
, 1);
1147 case ARG_IMMNMINUS1
:
1148 imm_operand
->X_add_number
--;
1149 output_ptr
= apply_fix (output_ptr
, R_IMM4L
, imm_operand
, 1);
1152 imm_operand
->X_add_number
= -imm_operand
->X_add_number
;
1154 output_ptr
= apply_fix (output_ptr
, R_IMM8
, imm_operand
, 2);
1157 output_ptr
= apply_fix (output_ptr
, R_IMM16
, imm_operand
, 4);
1161 output_ptr
= apply_fix (output_ptr
, R_IMM32
, imm_operand
, 8);
1171 /* Copy from the nibble buffer into the frag */
1174 int length
= (output_ptr
- buffer
) / 2;
1176 char *fragp
= frag_more (length
);
1178 while (src
< output_ptr
)
1180 *fragp
= (src
[0] << 4) | src
[1];
1189 /* This is the guts of the machine-dependent assembler. STR points to a
1190 machine dependent instruction. This function is supposed to emit
1191 the frags/bytes it assembles to. */
1200 struct z8k_op operand
[3];
1201 opcode_entry_type
*opcode
;
1202 opcode_entry_type
*prev_opcode
;
1207 /* Drop leading whitespace */
1211 /* find the op code end */
1212 for (op_start
= op_end
= str
;
1213 *op_end
!= 0 && *op_end
!= ' ';
1220 if (op_end
== op_start
)
1222 as_bad (_("can't find opcode "));
1228 opcode
= (opcode_entry_type
*) hash_find (opcode_hash_control
,
1234 as_bad (_("unknown opcode"));
1238 if (opcode
->opcode
== 250)
1240 /* was really a pseudo op */
1245 char *old
= input_line_pointer
;
1249 input_line_pointer
= op_end
;
1253 while (*input_line_pointer
== ' ')
1254 input_line_pointer
++;
1255 p
= (pseudo_typeS
*) (opcode
->func
);
1257 (p
->poc_handler
) (p
->poc_val
);
1258 input_line_pointer
= old
;
1263 input_line_pointer
= get_operands (opcode
, op_end
,
1265 prev_opcode
= opcode
;
1267 opcode
= get_specific (opcode
, operand
);
1271 /* Couldn't find an opcode which matched the operands */
1272 char *where
= frag_more (2);
1277 as_bad (_("Can't find opcode to match operands"));
1281 build_bytes (opcode
, operand
);
1286 tc_crawl_symbol_chain (headers
)
1287 object_headers
*headers
;
1289 printf (_("call to tc_crawl_symbol_chain \n"));
1293 md_undefined_symbol (name
)
1300 tc_headers_hook (headers
)
1301 object_headers
*headers
;
1303 printf (_("call to tc_headers_hook \n"));
1306 /* Various routines to kill one day */
1307 /* Equal to MAX_PRECISION in atof-ieee.c */
1308 #define MAX_LITTLENUMS 6
1310 /* Turn a string in input_line_pointer into a floating point constant of type
1311 type, and store the appropriate bytes in *litP. The number of LITTLENUMS
1312 emitted is stored in *sizeP . An error message is returned, or NULL on OK.
1315 md_atof (type
, litP
, sizeP
)
1321 LITTLENUM_TYPE words
[MAX_LITTLENUMS
];
1322 LITTLENUM_TYPE
*wordP
;
1354 return _("Bad call to MD_ATOF()");
1356 t
= atof_ieee (input_line_pointer
, type
, words
);
1358 input_line_pointer
= t
;
1360 *sizeP
= prec
* sizeof (LITTLENUM_TYPE
);
1361 for (wordP
= words
; prec
--;)
1363 md_number_to_chars (litP
, (long) (*wordP
++), sizeof (LITTLENUM_TYPE
));
1364 litP
+= sizeof (LITTLENUM_TYPE
);
1369 CONST
char *md_shortopts
= "z:";
1370 struct option md_longopts
[] = {
1371 {NULL
, no_argument
, NULL
, 0}
1373 size_t md_longopts_size
= sizeof(md_longopts
);
1376 md_parse_option (c
, arg
)
1383 if (!strcmp (arg
, "8001"))
1385 else if (!strcmp (arg
, "8002"))
1389 as_bad (_("invalid architecture -z%s"), arg
);
1402 md_show_usage (stream
)
1405 fprintf(stream
, _("\
1407 -z8001 generate segmented code\n\
1408 -z8002 generate unsegmented code\n"));
1412 tc_aout_fix_to_chars ()
1414 printf (_("call to tc_aout_fix_to_chars \n"));
1419 md_convert_frag (headers
, seg
, fragP
)
1420 object_headers
*headers
;
1424 printf (_("call to md_convert_frag \n"));
1429 md_section_align (seg
, size
)
1433 return ((size
+ (1 << section_alignment
[(int) seg
]) - 1) & (-1 << section_alignment
[(int) seg
]));
1438 md_apply_fix (fixP
, val
)
1442 char *buf
= fixP
->fx_where
+ fixP
->fx_frag
->fr_literal
;
1444 switch (fixP
->fx_r_type
)
1447 buf
[0] = (buf
[0] & 0xf0) | ((buf
[0] + val
) & 0xf);
1453 /* if (val != 0) abort();*/
1459 /* if (val != 0) abort();*/
1466 *buf
++ = (val
>> 8);
1470 *buf
++ = (val
>> 24);
1471 *buf
++ = (val
>> 16);
1472 *buf
++ = (val
>> 8);
1477 *buf
++ = (val
>> 16);
1479 *buf
++ = (val
>> 8);
1485 md_number_to_chars (buf
, val
, fixP
->fx_size
);
1495 md_estimate_size_before_relax (fragP
, segment_type
)
1496 register fragS
*fragP
;
1497 register segT segment_type
;
1499 printf (_("call tomd_estimate_size_before_relax \n"));
1503 /* Put number into target byte order */
1506 md_number_to_chars (ptr
, use
, nbytes
)
1511 number_to_chars_bigendian (ptr
, use
, nbytes
);
1514 md_pcrel_from (fixP
)
1521 tc_coff_symbol_emit_hook (s
)
1527 tc_reloc_mangle (fix_ptr
, intr
, base
)
1529 struct internal_reloc
*intr
;
1533 symbolS
*symbol_ptr
;
1535 if (fix_ptr
->fx_addsy
&&
1538 symbolS
*add
= fix_ptr
->fx_addsy
;
1539 symbolS
*sub
= fix_ptr
->fx_subsy
;
1540 if (S_GET_SEGMENT(add
) != S_GET_SEGMENT(sub
))
1542 as_bad(_("Can't subtract symbols in different sections %s %s"),
1543 S_GET_NAME(add
), S_GET_NAME(sub
));
1546 int diff
= S_GET_VALUE(add
) - S_GET_VALUE(sub
);
1547 fix_ptr
->fx_addsy
= 0;
1548 fix_ptr
->fx_subsy
= 0;
1549 fix_ptr
->fx_offset
+= diff
;
1552 symbol_ptr
= fix_ptr
->fx_addsy
;
1554 /* If this relocation is attached to a symbol then it's ok
1556 if (fix_ptr
->fx_r_type
== 0)
1558 /* cons likes to create reloc32's whatever the size of the reloc.. */
1559 switch (fix_ptr
->fx_size
)
1562 intr
->r_type
= R_IMM16
;
1565 intr
->r_type
= R_IMM8
;
1568 intr
->r_type
= R_IMM32
;
1577 intr
->r_type
= fix_ptr
->fx_r_type
;
1580 intr
->r_vaddr
= fix_ptr
->fx_frag
->fr_address
+ fix_ptr
->fx_where
+ base
;
1581 intr
->r_offset
= fix_ptr
->fx_offset
;
1584 intr
->r_symndx
= symbol_ptr
->sy_number
;
1586 intr
->r_symndx
= -1;