diff options
author | Steve Chamberlain <sac@cygnus> | 1992-02-11 00:51:52 +0000 |
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committer | Steve Chamberlain <sac@cygnus> | 1992-02-11 00:51:52 +0000 |
commit | 20ec2f6c98f119fa6c1c51fa207d052f381ad5f6 (patch) | |
tree | d08a3f29ad7f39088767b071fca9eedef37df58f /gas | |
parent | ffc500322549fb0747a8d66a0364c8964f02d3c7 (diff) | |
download | gdb-20ec2f6c98f119fa6c1c51fa207d052f381ad5f6.zip gdb-20ec2f6c98f119fa6c1c51fa207d052f381ad5f6.tar.gz gdb-20ec2f6c98f119fa6c1c51fa207d052f381ad5f6.tar.bz2 |
New files for MRI syntax assembler
Diffstat (limited to 'gas')
-rw-r--r-- | gas/config/.Sanitize | 7 | ||||
-rw-r--r-- | gas/config/tc-m68kmote.c | 4510 | ||||
-rw-r--r-- | gas/config/tc-m68kmote.h | 45 |
3 files changed, 4561 insertions, 1 deletions
diff --git a/gas/config/.Sanitize b/gas/config/.Sanitize index 800725e..aee19e2 100644 --- a/gas/config/.Sanitize +++ b/gas/config/.Sanitize @@ -86,6 +86,8 @@ tc-i960.h tc-m68851.h tc-m68k.c tc-m68k.h +tc-m68kmote.c +tc-m68kmote.h tc-mips.c tc-mips.h tc-ns32k.c @@ -126,7 +128,10 @@ echo Done in `pwd`. # # # $Log$ -# Revision 1.12 1991/12/12 03:34:31 sac +# Revision 1.13 1992/02/11 00:51:52 sac +# New files for MRI syntax assembler +# +# Revision 1.12 1991/12/12 03:34:31 sac # renamed obj-coff-bfd to obj-coffbfd # # Revision 1.11 1991/11/27 22:28:57 sac diff --git a/gas/config/tc-m68kmote.c b/gas/config/tc-m68kmote.c new file mode 100644 index 0000000..9d32caa --- /dev/null +++ b/gas/config/tc-m68kmote.c @@ -0,0 +1,4510 @@ +#define MRI +/* m68k.c All the m68020 specific stuff in one convenient, huge, + slow to compile, easy to find file. + Copyright (C) 1987, 1991 Free Software Foundation, Inc. + +This file is part of GAS, the GNU Assembler. + +GAS is free software; you can redistribute it and/or modify +it under the terms of the GNU General Public License as published by +the Free Software Foundation; either version 2, or (at your option) +any later version. + +GAS is distributed in the hope that it will be useful, +but WITHOUT ANY WARRANTY; without even the implied warranty of +MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the +GNU General Public License for more details. + +You should have received a copy of the GNU General Public License +along with GAS; see the file COPYING. If not, write to +the Free Software Foundation, 675 Mass Ave, Cambridge, MA 02139, USA. */ + +#include <ctype.h> + +#include "as.h" +#include "bfd.h" +#include "obstack.h" + + /* note that this file includes real declarations and thus can only be included by one source file per executable. */ +#include "opcode/m68k.h" +#ifdef TE_SUN +/* This variable contains the value to write out at the beginning of + the a.out file. The 2<<16 means that this is a 68020 file instead + of an old-style 68000 file */ + +long omagic = 2<<16|OMAGIC; /* Magic byte for header file */ +#else +long omagic = OMAGIC; +#endif + +/* This array holds the chars that always start a comment. If the + pre-processor is disabled, these aren't very useful */ +const char comment_chars[] = "|"; + +/* This array holds the chars that only start a comment at the beginning of + a line. If the line seems to have the form '# 123 filename' + .line and .file directives will appear in the pre-processed output */ +/* Note that input_file.c hand checks for '#' at the beginning of the + first line of the input file. This is because the compiler outputs + #NO_APP at the beginning of its output. */ +/* Also note that comments like this one will always work. */ +#ifdef MRI +const char line_comment_chars[] = "*"; +#else +const char line_comment_chars[] = "#"; +#endif + +/* Chars that can be used to separate mant from exp in floating point nums */ +const char EXP_CHARS[] = "eE"; + +/* Chars that mean this number is a floating point constant */ +/* As in 0f12.456 */ +/* or 0d1.2345e12 */ + +const char FLT_CHARS[] = "rRsSfFdDxXeEpP"; + +/* Also be aware that MAXIMUM_NUMBER_OF_CHARS_FOR_FLOAT may have to be + changed in read.c . Ideally it shouldn't have to know about it at all, + but nothing is ideal around here. + */ + +int md_reloc_size = 8; /* Size of relocation record */ + +/* Its an arbitrary name: This means I don't approve of it */ +/* See flames below */ +static struct obstack robyn; + +#define TAB(x,y) (((x)<<2)+(y)) +#define TABTYPE(xy) ((xy) >> 2) +#define BYTE 0 +#define SHORT 1 +#define LONG 2 +#define SZ_UNDEF 3 + +#define BRANCH 1 +#define FBRANCH 2 +#define PCREL 3 +#define BCC68000 4 +#define DBCC 5 +#define PCLEA 6 + +/* Operands we can parse: (And associated modes) + +numb: 8 bit num +numw: 16 bit num +numl: 32 bit num +dreg: data reg 0-7 +reg: address or data register +areg: address register +apc: address register, PC, ZPC or empty string +num: 16 or 32 bit num +num2: like num +sz: w or l if omitted, l assumed +scale: 1 2 4 or 8 if omitted, 1 assumed + +7.4 IMMED #num --> NUM +0.? DREG dreg --> dreg +1.? AREG areg --> areg +2.? AINDR areg@ --> *(areg) +3.? AINC areg@+ --> *(areg++) +4.? ADEC areg@- --> *(--areg) +5.? AOFF apc@(numw) --> *(apc+numw) -- empty string and ZPC not allowed here +6.? AINDX apc@(num,reg:sz:scale) --> *(apc+num+reg*scale) +6.? AINDX apc@(reg:sz:scale) --> same, with num=0 +6.? APODX apc@(num)@(num2,reg:sz:scale) --> *(*(apc+num)+num2+reg*scale) +6.? APODX apc@(num)@(reg:sz:scale) --> same, with num2=0 +6.? AMIND apc@(num)@(num2) --> *(*(apc+num)+num2) (previous mode without an index reg) +6.? APRDX apc@(num,reg:sz:scale)@(num2) --> *(*(apc+num+reg*scale)+num2) +6.? APRDX apc@(reg:sz:scale)@(num2) --> same, with num=0 +7.0 ABSL num:sz --> *(num) + num --> *(num) (sz L assumed) +*** MSCR otherreg --> Magic +With -l option +5.? AOFF apc@(num) --> *(apc+num) -- empty string and ZPC not allowed here still + +examples: + #foo #0x35 #12 + d2 + a4 + a3@ + a5@+ + a6@- + a2@(12) pc@(14) + a1@(5,d2:w:1) @(45,d6:l:4) + pc@(a2) @(d4) + etc . . . + + +#name@(numw) -->turn into PC rel mode +apc@(num8,reg:sz:scale) --> *(apc+num8+reg*scale) + +*/ + +enum operand_type { + IMMED = 1, + DREG, + AREG, + AINDR, + ADEC, + AINC, + AOFF, + AINDX, + APODX, + AMIND, + APRDX, + ABSL, + MSCR, + REGLST, +}; + + +struct m68k_exp { + char *e_beg; + char *e_end; + expressionS e_exp; + short e_siz; /* 0== default 1==short/byte 2==word 3==long */ +}; + +/* DATA and ADDR have to be contiguous, so that reg-DATA gives 0-7==data reg, + 8-15==addr reg for operands that take both types */ + +enum _register { + DATA = 1, /* 1- 8 == data registers 0-7 */ + DATA0 = DATA, + DATA1, + DATA2, + DATA3, + DATA4, + DATA5, + DATA6, + DATA7, + + ADDR, + ADDR0 = ADDR, + ADDR1, + ADDR2, + ADDR3, + ADDR4, + ADDR5, + ADDR6, + ADDR7, + +/* Note that COPNUM==processor #1 -- COPNUM+7==#8, which stores as 000 */ +/* I think. . . */ + + SP = ADDR7, + + FPREG, /* Eight FP registers */ + FP0 = FPREG, + FP1, + FP2, + FP3, + FP4, + FP5, + FP6, + FP7, + COPNUM = (FPREG+8), /* Co-processor #1-#8 */ + COP0 = COPNUM, + COP1, + COP2, + COP3, + COP4, + COP5, + COP6, + COP7, + PC, /* Program counter */ + ZPC, /* Hack for Program space, but 0 addressing */ + SR, /* Status Reg */ + CCR, /* Condition code Reg */ + +/* These have to be in order for the movec instruction to work. */ + USP, /* User Stack Pointer */ + ISP, /* Interrupt stack pointer */ + SFC, + DFC, + CACR, + VBR, + CAAR, + MSP, + ITT0, + ITT1, + DTT0, + DTT1, + MMUSR, + TC, + SRP, + URP, +/* end of movec ordering constraints */ + + FPI, + FPS, + FPC, + + DRP, + CRP, + CAL, + VAL, + SCC, + AC, + BAD, + BAD0 = BAD, + BAD1, + BAD2, + BAD3, + BAD4, + BAD5, + BAD6, + BAD7, + BAC, + BAC0 = BAC, + BAC1, + BAC2, + BAC3, + BAC4, + BAC5, + BAC6, + BAC7, + PSR, + PCSR, + + IC, /* instruction cache token */ + DC, /* data cache token */ + NC, /* no cache token */ + BC, /* both caches token */ + +}; + +/* Internal form of an operand. */ +struct m68k_op { + char *error; /* Couldn't parse it */ + enum operand_type mode; /* What mode this instruction is in. */ + enum _register reg; /* Base register */ + struct m68k_exp *con1; + int ireg; /* Index register */ + int isiz; /* 0==unspec 1==byte(?) 2==short 3==long */ + int imul; /* Multipy ireg by this (1,2,4,or 8) */ + struct m68k_exp *con2; +}; + +/* internal form of a 68020 instruction */ +struct m68k_it { + char *error; + char *args; /* list of opcode info */ + int numargs; + + int numo; /* Number of shorts in opcode */ + short opcode[11]; + + struct m68k_op operands[6]; + + int nexp; /* number of exprs in use */ + struct m68k_exp exprs[4]; + + int nfrag; /* Number of frags we have to produce */ + struct { + int fragoff; /* Where in the current opcode[] the frag ends */ + symbolS *fadd; + long foff; + int fragty; + } fragb[4]; + + int nrel; /* Num of reloc strucs in use */ + struct { + int n; + symbolS *add, + *sub; + long off; + char wid; + char pcrel; + } reloc[5]; /* Five is enough??? */ +}; + +#define cpu_of_arch(x) ((x) & m68000up) +#define float_of_arch(x) ((x) & mfloat) +#define mmu_of_arch(x) ((x) & mmmu) + +static struct m68k_it the_ins; /* the instruction being assembled */ + +/* Macros for adding things to the m68k_it struct */ + +#define addword(w) the_ins.opcode[the_ins.numo++]=(w) + +/* Like addword, but goes BEFORE general operands */ +#define insop(w) {int z;\ + for(z=the_ins.numo;z>opcode->m_codenum;--z)\ + the_ins.opcode[z]=the_ins.opcode[z-1];\ + for(z=0;z<the_ins.nrel;z++)\ + the_ins.reloc[z].n+=2;\ + the_ins.opcode[opcode->m_codenum]=w;\ + the_ins.numo++;\ +} + + +#define add_exp(beg,end) (\ + the_ins.exprs[the_ins.nexp].e_beg=beg,\ + the_ins.exprs[the_ins.nexp].e_end=end,\ + &the_ins.exprs[the_ins.nexp++]\ +) + + +/* The numo+1 kludge is so we can hit the low order byte of the prev word. Blecch*/ +#define add_fix(width,exp,pc_rel) {\ + the_ins.reloc[the_ins.nrel].n= ((width)=='B') ? (the_ins.numo*2-1) : \ + (((width)=='b') ? ((the_ins.numo-1)*2) : (the_ins.numo*2));\ + the_ins.reloc[the_ins.nrel].add=adds((exp));\ + the_ins.reloc[the_ins.nrel].sub=subs((exp));\ + the_ins.reloc[the_ins.nrel].off=offs((exp));\ + the_ins.reloc[the_ins.nrel].wid=width;\ + the_ins.reloc[the_ins.nrel++].pcrel=pc_rel;\ +} + +#define add_frag(add,off,type) {\ + the_ins.fragb[the_ins.nfrag].fragoff=the_ins.numo;\ + the_ins.fragb[the_ins.nfrag].fadd=add;\ + the_ins.fragb[the_ins.nfrag].foff=off;\ + the_ins.fragb[the_ins.nfrag++].fragty=type;\ +} + +#define isvar(exp) ((exp) && (adds(exp) || subs(exp))) + +#define seg(exp) ((exp)->e_exp.X_seg) +#define adds(exp) ((exp)->e_exp.X_add_symbol) +#define subs(exp) ((exp)->e_exp.X_subtract_symbol) +#define offs(exp) ((exp)->e_exp.X_add_number) + + +struct m68k_incant { + char *m_operands; + unsigned long m_opcode; + short m_opnum; + short m_codenum; + enum m68k_architecture m_arch; + struct m68k_incant *m_next; +}; + +#define getone(x) ((((x)->m_opcode)>>16)&0xffff) +#define gettwo(x) (((x)->m_opcode)&0xffff) + + +#ifdef __STDC__ + +static char *crack_operand(char *str, struct m68k_op *opP); +static int get_num(struct m68k_exp *exp, int ok); +static int get_regs(int i, char *str, struct m68k_op *opP); +static int reverse_16_bits(int in); +static int reverse_8_bits(int in); +static int try_index(char **s, struct m68k_op *opP); +static void install_gen_operand(int mode, int val); +static void install_operand(int mode, int val); +static void s_bss(void); +static void s_data1(void); +static void s_data2(void); +static void s_even(void); +static void s_proc(void); + +#else /* __STDC__ */ + +static char *crack_operand(); +static int get_num(); +static int get_regs(); +static int reverse_16_bits(); +static int reverse_8_bits(); +static int try_index(); +static void install_gen_operand(); +static void install_operand(); +static void s_bss(); +static void s_data1(); +static void s_data2(); +static void s_even(); +static void s_proc(); + +#endif /* __STDC__ */ + +static enum m68k_architecture current_architecture = 0; + +/* BCC68000 is for patching in an extra jmp instruction for long offsets + on the 68000. The 68000 doesn't support long branches with branchs */ + +/* This table desribes how you change sizes for the various types of variable + size expressions. This version only supports two kinds. */ + +/* Note that calls to frag_var need to specify the maximum expansion needed */ +/* This is currently 10 bytes for DBCC */ + +/* The fields are: + How far Forward this mode will reach: + How far Backward this mode will reach: + How many bytes this mode will add to the size of the frag + Which mode to go to if the offset won't fit in this one + */ +const relax_typeS +md_relax_table[] = { +{ 1, 1, 0, 0 }, /* First entries aren't used */ +{ 1, 1, 0, 0 }, /* For no good reason except */ +{ 1, 1, 0, 0 }, /* that the VAX doesn't either */ +{ 1, 1, 0, 0 }, + +{ (127), (-128), 0, TAB(BRANCH,SHORT)}, +{ (32767), (-32768), 2, TAB(BRANCH,LONG) }, +{ 0, 0, 4, 0 }, +{ 1, 1, 0, 0 }, + +{ 1, 1, 0, 0 }, /* FBRANCH doesn't come BYTE */ +{ (32767), (-32768), 2, TAB(FBRANCH,LONG)}, +{ 0, 0, 4, 0 }, +{ 1, 1, 0, 0 }, + +{ 1, 1, 0, 0 }, /* PCREL doesn't come BYTE */ +{ (32767), (-32768), 2, TAB(PCREL,LONG)}, +{ 0, 0, 4, 0 }, +{ 1, 1, 0, 0 }, + +{ (127), (-128), 0, TAB(BCC68000,SHORT)}, +{ (32767), (-32768), 2, TAB(BCC68000,LONG) }, +{ 0, 0, 6, 0 }, /* jmp long space */ +{ 1, 1, 0, 0 }, + +{ 1, 1, 0, 0 }, /* DBCC doesn't come BYTE */ +{ (32767), (-32768), 2, TAB(DBCC,LONG) }, +{ 0, 0, 10, 0 }, /* bra/jmp long space */ +{ 1, 1, 0, 0 }, + +{ 1, 1, 0, 0 }, /* PCLEA doesn't come BYTE */ +{ 32767, -32768, 2, TAB(PCLEA,LONG) }, +{ 0, 0, 6, 0 }, +{ 1, 1, 0, 0 }, + +}; + +/* These are the machine dependent pseudo-ops. These are included so + the assembler can work on the output from the SUN C compiler, which + generates these. + */ + +/* This table describes all the machine specific pseudo-ops the assembler + has to support. The fields are: + pseudo-op name without dot + function to call to execute this pseudo-op + Integer arg to pass to the function + */ +#ifdef MRI + +void cons(); +void s_sect(); +void float_cons(); +void s_align_bytes(); +void s_chip(); +void s_ds(); +void s_dcb(); +void s_dc(); +const pseudo_typeS md_pseudo_table[] = { + { "xdef", s_globl, 0 }, + { "sect", s_sect, 0 }, + { "dc", s_dc, 2 }, + { "dc.d", float_cons, 'd' }, + { "dc.s", float_cons, 'f' }, + { "dc.l", s_dc, 4 }, + { "dc.w", s_dc, 2 }, + { "dc.b", s_dc, 1 }, + { "comline", s_ds, 1 }, + { "ds.b", s_ds, 1 }, + { "ds.w", s_ds, 2 }, + { "ds", s_ds, 2 }, + { "ds.l", s_ds, 4 }, + { "ds.d", s_ds, 8 }, + { "ds.s", s_ds, 4 }, + { "dcb", s_dcb, 2 }, + { "dcb.b", s_dcb, 1 }, + { "dcb.w", s_dcb, 2 }, + { "dcb.l", s_dcb, 4 }, + { "xcom", s_comm, 0 }, + { "align", s_align_bytes, 0 }, + { "chip", s_chip, 0 }, + { 0, 0, 0 } +}; +#else + +const pseudo_typeS md_pseudo_table[] = { + { "data1", s_data1, 0 }, + { "data2", s_data2, 0 }, + { "bss", s_bss, 0 }, + { "even", s_even, 0 }, + { "skip", s_space, 0 }, + { "proc", s_proc, 0 }, + { 0, 0, 0 } +} + + + + +#endif + +/* #define isbyte(x) ((x)>=-128 && (x)<=127) */ +/* #define isword(x) ((x)>=-32768 && (x)<=32767) */ + +#define issbyte(x) ((x)>=-128 && (x)<=127) +#define isubyte(x) ((x)>=0 && (x)<=255) +#define issword(x) ((x)>=-32768 && (x)<=32767) +#define isuword(x) ((x)>=0 && (x)<=65535) + +#define isbyte(x) ((x)>=-128 && (x)<=255) +#define isword(x) ((x)>=-32768 && (x)<=65535) +#define islong(x) (1) + +extern char *input_line_pointer; + +enum { + FAIL = 0, + OK = 1, +}; + +/* JF these tables here are for speed at the expense of size */ +/* You can replace them with the #if 0 versions if you really + need space and don't mind it running a bit slower */ + +static char mklower_table[256]; +#define mklower(c) (mklower_table[(unsigned char)(c)]) +static char notend_table[256]; +static char alt_notend_table[256]; +#define notend(s) ( !(notend_table[(unsigned char)(*s)] || (*s==':' &&\ + alt_notend_table[(unsigned char)(s[1])]))) + +#if 0 +#define mklower(c) (isupper(c) ? tolower(c) : c) +#endif + +#define ISSPACE(x) ((x) == ' ' || (x) == '\t') +#ifdef MRI +#define MULTIPLIER '*' +#define SIZER '.' +#else +#define MULTIPLIER ':' +#define SIZER ':' +#endif + + +/* JF modified this to handle cases where the first part of a symbol name + looks like a register */ + +/* + * m68k_reg_parse() := if it looks like a register, return it's token & + * advance the pointer. + */ + +enum _register m68k_reg_parse(ccp) +register char **ccp; +{ +#ifndef MAX_REG_NAME_LEN +#define MAX_REG_NAME_LEN (6) +#endif /* MAX_REG_NAME_LEN */ + register char c[MAX_REG_NAME_LEN]; + char *p, *q; + register int n = 0, + ret = FAIL; + + c[0] = mklower(ccp[0][0]); +#ifdef REGISTER_PREFIX + if (c[0] != REGISTER_PREFIX) { + return(FAIL); + } /* need prefix */ +#endif + + for (p = c, q = ccp[0]; p < c + MAX_REG_NAME_LEN; ++p, ++q) + { + if (*q == 0) + { + *p = 0; + break; + } + else + *p = mklower(*q); + } /* downcase */ + + switch(c[0]) { + case 'a': + if(c[1]>='0' && c[1]<='7') { + n=2; + ret=ADDR+c[1]-'0'; + } +#ifndef NO_68851 + else if (c[1] == 'c') { + n = 2; + ret = AC; + } +#endif + break; +#ifndef NO_68851 + case 'b': + if (c[1] == 'a') { + if (c[2] == 'd') { + if (c[3] >= '0' && c[3] <= '7') { + n = 4; + ret = BAD + c[3] - '0'; + } + } /* BAD */ + if (c[2] == 'c') { + if (c[3] >= '0' && c[3] <= '7') { + n = 4; + ret = BAC + c[3] - '0'; + } + } /* BAC */ + } else if (c[1] == 'c') { + n = 2; + ret = BC; + } /* BC */ + break; +#endif + case 'c': +#ifndef NO_68851 + if (c[1] == 'a' && c[2] == 'l') { + n = 3; + ret = CAL; + } else +#endif + /* This supports both CCR and CC as the ccr reg. */ + if(c[1]=='c' && c[2]=='r') { + n=3; + ret = CCR; + } else if(c[1]=='c') { + n=2; + ret = CCR; + } else if(c[1]=='a' && (c[2]=='a' || c[2]=='c') && c[3]=='r') { + n=4; + ret = c[2]=='a' ? CAAR : CACR; + } +#ifndef NO_68851 + else if (c[1] == 'r' && c[2] == 'p') { + n = 3; + ret = (CRP); + } +#endif + break; + case 'd': + if (c[1] >= '0' && c[1] <= '7') { + n = 2; + ret = DATA + c[1] - '0'; + } else if (c[1] == 'f' && c[2] == 'c') { + n = 3; + ret = DFC; + } else if (c[1] == 'c') { + n = 2; + ret = DC; + } else if (c[1] == 't' && c[2] == 't') { + if ('0' <= c[3] && c[3] <= '1') { + n = 4; + ret = DTT0 + (c[3] - '0'); + } /* DTT[01] */ + } +#ifndef NO_68851 + else if (c[1] == 'r' && c[2] == 'p') { + n = 3; + ret = (DRP); + } +#endif + break; + case 'f': + if(c[1]=='p') { + if(c[2]>='0' && c[2]<='7') { + n=3; + ret = FPREG+c[2]-'0'; + if(c[3]==':') + ccp[0][3]=','; + } else if(c[2]=='i') { + n=3; + ret = FPI; + } else if(c[2]=='s') { + n= (c[3] == 'r' ? 4 : 3); + ret = FPS; + } else if(c[2]=='c') { + n= (c[3] == 'r' ? 4 : 3); + ret = FPC; + } else if (!isalpha(c[2]) && !isdigit(c[2])) { + n = 2; + ret = ADDR + 6; + } + + + } + break; + case 'i': + if (c[1] == 's' && c[2] == 'p') { + n = 3; + ret = ISP; + } else if (c[1] == 'c') { + n = 2; + ret = IC; + } else if (c[1] == 't' && c[2] == 't') { + if ('0' <= c[3] && c[3] <= '1') { + n = 4; + ret = ITT0 + (c[3] - '0'); + } /* ITT[01] */ + } + break; + case 'm': + if (c[1] == 's' && c[2] == 'p') { + n = 3; + ret = MSP; + } else if (c[1] == 'm' && c[2] == 'u' && c[3] == 's' && c[4] == 'r') { + n = 5; + ret = MMUSR; + } + break; + case 'n': + if (c[1] == 'c') { + n = 2; + ret = NC; + } + break; + case 'p': + if(c[1]=='c') { +#ifndef NO_68851 + if(c[2] == 's' && c[3]=='r') { + n=4; + ret = (PCSR); + } else +#endif + { + n=2; + ret = PC; + } + } +#ifndef NO_68851 + else if (c[1] == 's' && c[2] == 'r') { + n = 3; + ret = (PSR); + } +#endif + break; + case 's': +#ifndef NO_68851 + if (c[1] == 'c' && c[2] == 'c') { + n = 3; + ret = (SCC); + } else +#endif + if (c[1] == 'r') { + if (c[2] == 'p') { + n = 3; + ret = SRP; + } else { + n = 2; + ret = SR; + } /* srp else sr */ + } else if (c[1] == 'p') { + n = 2; + ret = SP; + } else if (c[1] == 'f' && c[2] == 'c') { + n = 3; + ret = SFC; + } + break; + case 't': + if (c[1] == 'c') { + n = 2; + ret = TC; + } + break; + case 'u': + if (c[1] == 's' && c[2] == 'p') { + n=3; + ret = USP; + } else if (c[1] == 'r' && c[2] == 'p') { + n = 3; + ret = URP; + } + break; + case 'v': +#ifndef NO_68851 + if (c[1] == 'a' && c[2] == 'l') { + n = 3; + ret = (VAL); + } else +#endif + if(c[1]=='b' && c[2]=='r') { + n=3; + ret = VBR; + } + break; + case 'z': + if(c[1]=='p' && c[2]=='c') { + n=3; + ret = ZPC; + } + break; + default: + break; + } + if(n) { +#ifdef REGISTER_PREFIX + n++; +#endif + if(isalnum(ccp[0][n]) || ccp[0][n]=='_') + ret=FAIL; + else + ccp[0]+=n; + } else + ret = FAIL; + return ret; +} + +#define SKIP_WHITE() { str++; if(ISSPACE(*str)) str++;} + +#ifdef MRI + + +/* Parse an operand from the text *str into the operand struct *opP. */ +int + m68k_ip_op(str,opP) +char *str; +register struct m68k_op *opP; +{ + char *strend; + long i; + char *parse_index(); + + /* Skip leading blank */ + if(ISSPACE(*str)) + str++; + if(!*str) { + opP->error="Missing operand"; + return FAIL; + } + /* *strend = last character of string */ + for(strend=str;*strend;strend++) + ; + --strend; + + /* Logic of the parsing switch(*str): + case opP->mode = + ---- ----------- + #anything IMMED 1 + REG AREG or DREG or MSCR 3 or 2 or 13 + REG- or REG/ REGLST 14 + (REG) AINDR 4 + (REG)+ AINC 6 + (REG,INDX) AINDX 8 + (EXPR,REG) AOFF 7 + (EXPR,REG,INDX) AINDX 8 + -(REG) ADEC 5 + EXP2(REG) AOFF 7 + EXP2(REG,INDX) AINDX 8 + EXP2 ABSL 12 + + REG means truth(m68k_reg_parse(&str)) + INDX means truth(try_index(&str,opP)) + EXPR means not REG + EXP2 means not REG and not '(' and not '-(' + */ + + if(*str=='#') { + /* "#<expression>" Immediate mode */ + str++; + opP->con1=add_exp(str,strend); + opP->mode=IMMED; + return OK; + } + + i=m68k_reg_parse(&str); + if (i!=FAIL) { + if(*str=='\0') { + /* "Rn" Register Direct mode */ + opP->reg=i; + if(i>=DATA+0 && i<=DATA+7) + opP->mode=DREG; + else if(i>=ADDR+0 && i<=ADDR+7) + opP->mode=AREG; + else + opP->mode=MSCR; + return OK; + } + else if(*str=='/' || *str=='-') { + /* "Rm-Rn/Ro-Rp" Register list for MOVEM instruction */ + opP->mode=REGLST; + return get_regs(i,str,opP); + } + else { + opP->error="Junk after register name"; + return FAIL; + } + } + + if(*str=='(') { + str++; + i=m68k_reg_parse(&str); + if((i<ADDR+0 || i>ADDR+7) && i!=PC && i!=ZPC && i!=FAIL) { + /* Can't indirect off non address regs */ + opP->error="Invalid indirect register"; + return FAIL; + } + if(i!=FAIL) { + opP->reg=i; + if(*str==')') { + str++; + if(*str=='\0') { + /* "(An)" Address Register Indirect mode */ + opP->mode=AINDR; + return OK; + } + if(*str=='+') { + if(str[1]=='\0') { + /* "(An)+" Register Indirect w Postincrement */ + opP->mode=AINC; + return OK; + } + } + opP->error="Junk after indirect"; + return FAIL; + } + if(*str==',') { + str++; + i=try_index(&str,opP); + if(i==FAIL) return FAIL; + /* "(An,Rn)" Register Indirect with Index mode*/ + opP->mode=AINDX; + return OK; + } + else { + opP->error="Bad indirect syntax"; + return FAIL; + } + } + else { + /* "(EXPR,..." , a displacement */ + char *stmp; + char *index(); + + if(stmp=index(str,',')) { + opP->con1=add_exp(str,stmp-1); + str=stmp; + SKIP_WHITE(); + i=m68k_reg_parse(&str); + if((i<ADDR+0 || i>ADDR+7) && i!=PC && i!=ZPC) { + /* Can't indirect off non address regs */ + opP->error="Invalid indirect register"; + return FAIL; + } + if(i!=FAIL) { + opP->reg=i; + if(*str==')') { + /* "(d,An)" Register Indirect w Displacement */ + opP->mode=AOFF; + return OK; + } + if(*str==',') { + str++; + i=try_index(&str,opP); + if(i==FAIL) return FAIL; + /* "(d,An,Rn)" Register Indirect with Index */ + opP->mode=AINDX; + return OK; + } + else { + opP->error="Bad indirect syntax"; + return FAIL; + } + } + else { + opP->error="Invalid register"; + return FAIL; + } + } + else { + opP->error="Missing register for indirect"; + return FAIL; + } + } + } + + if(*str=='-') { + if(str[1]=='(') { + str = str+2; + i=m68k_reg_parse(&str); + if((i<ADDR+0 || i>ADDR+7) && i!=PC && i!=ZPC && i!=FAIL) { + /* Can't indirect off non address regs */ + opP->error="Invalid indirect register"; + return FAIL; + } + if(i!=FAIL) { + opP->reg=i; + if(*str==')') { + str++; + if(*str=='\0') { + /* "-(An)" Register Indirect with Predecrement */ + opP->mode=ADEC; + return OK; + } + opP->error="Junk after indirect"; + return FAIL; + } + opP->error="Bad indirect syntax"; + return FAIL; + } + opP->error="Invalid register"; + return FAIL; + } + /* if '-' but not "-(', do nothing */ + } + + /* whether *str=='-' or not */ + { + /* "EXP2" or "EXP2(REG..." */ + char *stmp; + char *index(); + if(stmp=index(str,'(')) { + opP->con1=add_exp(str,stmp-1); + str=stmp+1; + i=m68k_reg_parse(&str); + if((i<ADDR+0 || i>ADDR+7) && i!=PC && i!=ZPC) { + /* Can't indirect off non address regs */ + opP->error="Invalid indirect register"; + return FAIL; + } + if(i!=FAIL) { + opP->reg=i; + if(*str==')') { + /* "d(An)" Register Indirect w Displacement */ + opP->mode=AOFF; + return OK; + } + if(*str==',') { + str++; + i=try_index(&str,opP); + if(i==FAIL) return FAIL; + /* "d(An,Rn)" Register Indirect with Index */ + opP->mode=AINDX; + return OK; + } + else { + opP->error="Bad indirect syntax"; + return FAIL; + } + } + else { + opP->error="Invalid register"; + return FAIL; + } + } + else { + /* "EXP2" Absolute */ + opP->mode=ABSL; + if(strend[-1]=='.') { /* mode ==foo.[wl] */ + switch(*strend) { + case 'w': + case 'W': + opP->isiz=2; + break; + case 'l': + case 'L': + opP->isiz=3; + break; + default: + opP->error="Size spec not .W or .L"; + return FAIL; + } + strend-=2; + } + else opP->isiz=0; + + + opP->con1=add_exp(str,strend); + return OK; + } + } +} +/* end of m68k_ip_op () */ +#else +/* + * m68k_ip_op := '#' + <anything> + * | <register> + range_sep + get_regs + * ; + * + * range_sep := '/' | '-' ; + * + * SKIP_WHITE := <empty> | ' ' ; + * + */ + +int +m68k_ip_op(str,opP) +char *str; +register struct m68k_op *opP; +{ + char *strend; + long i; + char *parse_index(); + + if (ISSPACE(*str)) { + str++; + } /* Find the beginning of the string */ + + if(!*str) { + opP->error="Missing operand"; + return FAIL; + } /* Out of gas */ + + for(strend = str; *strend; strend++) ;; + + --strend; + + if(*str=='#') { + str++; + opP->con1=add_exp(str,strend); + opP->mode=IMMED; + return OK; + } /* Guess what: A constant. Shar and enjoy */ + + i = m68k_reg_parse(&str); + + /* is a register, is exactly a register, and is followed by '@' */ + + if((i==FAIL || *str!='\0') && *str!='@') { + char *stmp; + + if(i!=FAIL && (*str=='/' || *str=='-')) { + opP->mode=REGLST; + return(get_regs(i,str,opP)); + } + if ((stmp=strchr(str,'@')) != '\0') { + opP->con1=add_exp(str,stmp-1); + if(stmp==strend) { + opP->mode=AINDX; + return(OK); + } + + if ((current_architecture & m68020up) == 0) { + return(FAIL); + } /* if target is not a '20 or better */ + + stmp++; + if(*stmp++!='(' || *strend--!=')') { + opP->error="Malformed operand"; + return(FAIL); + } + i=try_index(&stmp,opP); + opP->con2=add_exp(stmp,strend); + + if (i == FAIL) { + opP->mode=AMIND; + } else { + opP->mode=APODX; + } + return(OK); + } /* if there's an '@' */ + opP->mode = ABSL; + opP->con1 = add_exp(str,strend); + return(OK); + } /* not a register, not exactly a register, or no '@' */ + + opP->reg=i; + + if (*str=='\0') { + if(i>=DATA+0 && i<=DATA+7) + opP->mode=DREG; + else if(i>=ADDR+0 && i<=ADDR+7) + opP->mode=AREG; + else + opP->mode=MSCR; + return OK; + } + + if((i<ADDR+0 || i>ADDR+7) && i!=PC && i!=ZPC && i!=FAIL) { /* Can't indirect off non address regs */ + opP->error="Invalid indirect register"; + return FAIL; + } + know(*str == '@'); + + str++; + switch(*str) { + case '\0': + opP->mode=AINDR; + return OK; + case '-': + opP->mode=ADEC; + return OK; + case '+': + opP->mode=AINC; + return OK; + case '(': + str++; + break; + default: + opP->error="Junk after indirect"; + return FAIL; + } + /* Some kind of indexing involved. Lets find out how bad it is */ + i=try_index(&str,opP); + /* Didn't start with an index reg, maybe its offset or offset,reg */ + if(i==FAIL) { + char *beg_str; + + beg_str=str; + for(i=1;i;) { + switch(*str++) { + case '\0': + opP->error="Missing )"; + return FAIL; + case ',': i=0; break; + case '(': i++; break; + case ')': --i; break; + } + } + /* if(str[-3]==':') { + int siz; + + switch(str[-2]) { + case 'b': + case 'B': + siz=1; + break; + case 'w': + case 'W': + siz=2; + break; + case 'l': + case 'L': + siz=3; + break; + default: + opP->error="Specified size isn't :w or :l"; + return FAIL; + } + opP->con1=add_exp(beg_str,str-4); + opP->con1->e_siz=siz; + } else */ + opP->con1=add_exp(beg_str,str-2); + /* Should be offset,reg */ + if(str[-1]==',') { + i=try_index(&str,opP); + if(i==FAIL) { + opP->error="Malformed index reg"; + return FAIL; + } + } + } + /* We've now got offset) offset,reg) or reg) */ + + if (*str == '\0') { + /* Th-the-thats all folks */ + if (opP->reg == FAIL) opP->mode = AINDX; /* Other form of indirect */ + else if(opP->ireg == FAIL) opP->mode = AOFF; + else opP->mode = AINDX; + return(OK); + } + /* Next thing had better be another @ */ + if(*str!='@' || str[1]!='(') { + opP->error = "junk after indirect"; + return(FAIL); + } + + if ((current_architecture & m68020up) == 0) { + return(FAIL); + } /* if target is not a '20 or better */ + + str+=2; + + if(opP->ireg != FAIL) { + opP->mode = APRDX; + + i = try_index(&str, opP); + if (i != FAIL) { + opP->error = "Two index registers! not allowed!"; + return(FAIL); + } + } else { + i = try_index(&str, opP); + } + + if (i == FAIL) { + char *beg_str; + + beg_str = str; + + for (i = 1; i; ) { + switch(*str++) { + case '\0': + opP->error="Missing )"; + return(FAIL); + case ',': i=0; break; + case '(': i++; break; + case ')': --i; break; + } + } + + opP->con2=add_exp(beg_str,str-2); + + if (str[-1] == ',') { + if (opP->ireg != FAIL) { + opP->error = "Can't have two index regs"; + return(FAIL); + } + + i = try_index(&str, opP); + + if (i == FAIL) { + opP->error = "malformed index reg"; + return(FAIL); + } + + opP->mode = APODX; + } else if (opP->ireg != FAIL) { + opP->mode = APRDX; + } else { + opP->mode = AMIND; + } + } else { + opP->mode = APODX; + } + + if(*str!='\0') { + opP->error="Junk after indirect"; + return FAIL; + } + return(OK); +} /* m68k_ip_op() */ +#endif +/* + * + * try_index := data_or_address_register + ')' + SKIP_W + * | data_or_address_register + ':' + SKIP_W + size_spec + SKIP_W + multiplier + ')' + SKIP_W + * + * multiplier := <empty> + * | ':' + multiplier_number + * ; + * + * multiplier_number := '1' | '2' | '4' | '8' ; + * + * size_spec := 'l' | 'L' | 'w' | 'W' ; + * + * SKIP_W := <empty> | ' ' ; + * + */ + +static int try_index(s,opP) +char **s; +struct m68k_op *opP; +{ + register int i; + char *ss; +#define SKIP_W() { ss++; if (ISSPACE(*ss)) ss++;} + + ss= *s; + /* SKIP_W(); */ + i=m68k_reg_parse(&ss); + if(!(i>=DATA+0 && i<=ADDR+7)) { /* if i is not DATA or ADDR reg */ + *s=ss; + return FAIL; + } + opP->ireg=i; + /* SKIP_W(); */ + if(*ss==')') { + opP->isiz=0; + opP->imul=1; + SKIP_W(); + *s=ss; + return OK; + } + if(*ss!=SIZER) + { + opP->error="Missing : in index register"; + *s=ss; + return FAIL; + } + SKIP_W(); + switch(*ss) { + case 'w': + case 'W': + opP->isiz=2; + break; + case 'l': + case 'L': + opP->isiz=3; + break; + default: + opP->error="Index register size spec not :w or :l"; + *s=ss; + return FAIL; + } + SKIP_W(); + if(*ss==MULTIPLIER) + { + SKIP_W(); + switch(*ss) { + case '1': + case '2': + case '4': + case '8': + opP->imul= *ss-'0'; + break; + default: + opP->error="index multiplier not 1, 2, 4 or 8"; + *s=ss; + return FAIL; + } + SKIP_W(); + } else opP->imul=1; + if(*ss!=')') { + opP->error="Missing )"; + *s=ss; + return FAIL; + } + SKIP_W(); + *s=ss; + return OK; +} /* try_index() */ + +#ifdef TEST1 /* TEST1 tests m68k_ip_op(), which parses operands */ +main() +{ + char buf[128]; + struct m68k_op thark; + + for(;;) { + if(!gets(buf)) + break; + bzero(&thark,sizeof(thark)); + if(!m68k_ip_op(buf,&thark)) printf("FAIL:"); + if(thark.error) + printf("op1 error %s in %s\n",thark.error,buf); + printf("mode %d, reg %d, ",thark.mode,thark.reg); + if(thark.b_const) + printf("Constant: '%.*s',",1+thark.e_const-thark.b_const,thark.b_const); + printf("ireg %d, isiz %d, imul %d ",thark.ireg,thark.isiz,thark.imul); + if(thark.b_iadd) + printf("Iadd: '%.*s'",1+thark.e_iadd-thark.b_iadd,thark.b_iadd); + printf("\n"); + } + exit(0); +} + +#endif + + +static struct hash_control* op_hash = NULL; /* handle of the OPCODE hash table + NULL means any use before m68k_ip_begin() + will crash */ + + +/* + * m 6 8 k _ i p ( ) + * + * This converts a string into a 68k instruction. + * The string must be a bare single instruction in sun format + * with RMS-style 68020 indirects + * (example: ) + * + * It provides some error messages: at most one fatal error message (which + * stops the scan) and at most one warning message for each operand. + * The 68k instruction is returned in exploded form, since we have no + * knowledge of how you parse (or evaluate) your expressions. + * We do however strip off and decode addressing modes and operation + * mnemonic. + * + * This function's value is a string. If it is not "" then an internal + * logic error was found: read this code to assign meaning to the string. + * No argument string should generate such an error string: + * it means a bug in our code, not in the user's text. + * + * You MUST have called m68k_ip_begin() once and m86_ip_end() never before using + * this function. + */ + +/* JF this function no longer returns a useful value. Sorry */ +void m68k_ip (instring) +char *instring; +{ + register char *p; + register struct m68k_op *opP; + register struct m68k_incant *opcode, prev_opcode; + register char *s; + register int tmpreg = 0, + baseo = 0, + outro = 0, + nextword; + int siz1, + siz2; + char c; + int losing; + int opsfound; + char *crack_operand(); + + LITTLENUM_TYPE words[6]; + LITTLENUM_TYPE *wordp; + + if (ISSPACE(*instring)) + instring++; /* skip leading whitespace */ + + /* Scan up to end of operation-code, which MUST end in end-of-string + or exactly 1 space. */ + for (p = instring; *p != '\0'; p++) + if (ISSPACE(*p)) + break; + + + if (p == instring) { + the_ins.error = "No operator"; + the_ins.opcode[0] = NULL; + /* the_ins.numo=1; */ + return; + } + + /* p now points to the end of the opcode name, probably whitespace. + make sure the name is null terminated by clobbering the whitespace, + look it up in the hash table, then fix it back. */ + c = *p; + *p = '\0'; +#ifdef MRI + /* Copy from input line to our private buffer, and drop any dots */ +{ + char our_copy[100]; + char *dst = our_copy; + char *src = instring; + while (*src) + { + if (*src != '.') + *dst++ = *src; + src++; + } + *dst = 0; + + + opcode = (struct m68k_incant *)hash_find (op_hash, our_copy); + + /* If no match, try again with a w suffix */ + if (!opcode) + { + *dst++ = 'w'; + *dst = 0; + opcode = (struct m68k_incant *)hash_find (op_hash, our_copy); + } + + + +} + +#else + opcode = (struct m68k_incant *)hash_find (op_hash, instring); +#endif + *p = c; + + if (opcode == NULL) { + the_ins.error = "Unknown opcode"; + the_ins.opcode[0] = NULL; + /* the_ins.numo=1; */ + return; + } + + /* found a legitimate opcode, start matching operands */ + while (ISSPACE(*p)) ++p; + + for(opP = &the_ins.operands[0]; *p; opP++) { + + p = crack_operand(p, opP); + + if (opP->error) { + the_ins.error=opP->error; + return; + } + } + + opsfound = opP - &the_ins.operands[0]; + + /* This ugly hack is to support the floating pt opcodes in their standard form */ + /* Essentially, we fake a first enty of type COP#1 */ + if (opcode->m_operands[0]=='I') { + int n; + + for(n=opsfound;n>0;--n) + the_ins.operands[n]=the_ins.operands[n-1]; + + /* bcopy((char *)(&the_ins.operands[0]),(char *)(&the_ins.operands[1]),opsfound*sizeof(the_ins.operands[0])); */ + bzero((char *)(&the_ins.operands[0]),sizeof(the_ins.operands[0])); + the_ins.operands[0].mode=MSCR; + the_ins.operands[0].reg=COPNUM; /* COP #1 */ + opsfound++; + } + + /* We've got the operands. Find an opcode that'll accept them */ + for (losing = 0; ; ) { + /* if we didn't get the right number of ops, + or we have no common model with this pattern + then reject this pattern. */ + + if (opsfound != opcode->m_opnum + || ((opcode->m_arch & current_architecture) == 0)) { + + ++losing; + + } else { + for (s=opcode->m_operands, opP = &the_ins.operands[0]; *s && !losing; s += 2, opP++) { + /* Warning: this switch is huge! */ + /* I've tried to organize the cases into this order: + non-alpha first, then alpha by letter. lower-case goes directly + before uppercase counterpart. */ + /* Code with multiple case ...: gets sorted by the lowest case ... + it belongs to. I hope this makes sense. */ + switch(*s) { + case '!': + if (opP->mode == MSCR || opP->mode == IMMED + || opP->mode == DREG || opP->mode == AREG + || opP->mode == AINC || opP->mode == ADEC + || opP->mode == REGLST) + losing++; + break; + + case '#': + if(opP->mode!=IMMED) + losing++; + else { + long t; + + t=get_num(opP->con1,80); + if(s[1]=='b' && !isbyte(t)) + losing++; + else if(s[1]=='w' && !isword(t)) + losing++; + } + break; + + case '^': + case 'T': + if(opP->mode!=IMMED) + losing++; + break; + + case '$': + if(opP->mode==MSCR || opP->mode==AREG || + opP->mode==IMMED || opP->reg==PC || opP->reg==ZPC || opP->mode==REGLST) + losing++; + break; + + case '%': + if(opP->mode==MSCR || opP->reg==PC || + opP->reg==ZPC || opP->mode==REGLST) + losing++; + break; + + + case '&': + if(opP->mode==MSCR || opP->mode==DREG || + opP->mode==AREG || opP->mode==IMMED || opP->reg==PC || opP->reg==ZPC || + opP->mode==AINC || opP->mode==ADEC || opP->mode==REGLST) + losing++; + break; + + case '*': + if(opP->mode==MSCR || opP->mode==REGLST) + losing++; + break; + + case '+': + if(opP->mode!=AINC) + losing++; + break; + + case '-': + if(opP->mode!=ADEC) + losing++; + break; + + case '/': + if(opP->mode==MSCR || opP->mode==AREG || + opP->mode==AINC || opP->mode==ADEC || opP->mode==IMMED || opP->mode==REGLST) + losing++; + break; + + case ';': + if(opP->mode==MSCR || opP->mode==AREG || opP->mode==REGLST) + losing++; + break; + + case '?': + if(opP->mode==MSCR || opP->mode==AREG || + opP->mode==AINC || opP->mode==ADEC || opP->mode==IMMED || opP->reg==PC || + opP->reg==ZPC || opP->mode==REGLST) + losing++; + break; + + case '@': + if(opP->mode==MSCR || opP->mode==AREG || + opP->mode==IMMED || opP->mode==REGLST) + losing++; + break; + + case '~': /* For now! (JF FOO is this right?) */ + if(opP->mode==MSCR || opP->mode==DREG || + opP->mode==AREG || opP->mode==IMMED || opP->reg==PC || opP->reg==ZPC || opP->mode==REGLST) + losing++; + break; + + case 'A': + if(opP->mode!=AREG) + losing++; + break; + case 'a': + if (opP->mode != AINDR) { + ++losing; + } /* if not address register indirect */ + break; + case 'B': /* FOO */ + if(opP->mode!=ABSL || (flagseen['S'] && instring[0] == 'j' + && instring[1] == 'b' + && instring[2] == 's' + && instring[3] == 'r')) + losing++; + break; + + case 'C': + if(opP->mode!=MSCR || opP->reg!=CCR) + losing++; + break; + + case 'd': /* FOO This mode is a KLUDGE!! */ + if(opP->mode!=AOFF && (opP->mode!=ABSL || + opP->con1->e_beg[0]!='(' || opP->con1->e_end[0]!=')')) + losing++; + break; + + case 'D': + if(opP->mode!=DREG) + losing++; + break; + + case 'F': + if(opP->mode!=MSCR || opP->reg<(FPREG+0) || opP->reg>(FPREG+7)) + losing++; + break; + + case 'I': + if(opP->mode!=MSCR || opP->reg<COPNUM || + opP->reg>=COPNUM+7) + losing++; + break; + + case 'J': + if (opP->mode != MSCR + || opP->reg < USP + || opP->reg > URP + || cpu_of_arch(current_architecture) < m68010 /* before 68010 had none */ + || (cpu_of_arch(current_architecture) < m68020 + && opP->reg != SFC + && opP->reg != DFC + && opP->reg != USP + && opP->reg != VBR) /* 68010's had only these */ + || (cpu_of_arch(current_architecture) < m68040 + && opP->reg != SFC + && opP->reg != DFC + && opP->reg != USP + && opP->reg != VBR + && opP->reg != CACR + && opP->reg != CAAR + && opP->reg != MSP + && opP->reg != ISP) /* 680[23]0's have only these */ + || (cpu_of_arch(current_architecture) == m68040 /* 68040 has all but this */ + && opP->reg == CAAR)) { + losing++; + } /* doesn't cut it */ + break; + + case 'k': + if(opP->mode!=IMMED) + losing++; + break; + + case 'l': + case 'L': + if(opP->mode==DREG || opP->mode==AREG || opP->mode==FPREG) { + if(s[1]=='8') + losing++; + else { + opP->mode=REGLST; + opP->reg=1<<(opP->reg-DATA); + } + } else if(opP->mode!=REGLST) { + losing++; + } else if(s[1]=='8' && opP->reg&0x0FFffFF) + losing++; + else if(s[1]=='3' && opP->reg&0x7000000) + losing++; + break; + + case 'M': + if(opP->mode!=IMMED) + losing++; + else { + long t; + + t=get_num(opP->con1,80); + if(!issbyte(t) || isvar(opP->con1)) + losing++; + } + break; + + case 'O': + if(opP->mode!=DREG && opP->mode!=IMMED) + losing++; + break; + + case 'Q': + if(opP->mode!=IMMED) + losing++; + else { + long t; + + t=get_num(opP->con1,80); + if(t<1 || t>8 || isvar(opP->con1)) + losing++; + } + break; + + case 'R': + if(opP->mode!=DREG && opP->mode!=AREG) + losing++; + break; + + case 's': + if(opP->mode!=MSCR || !(opP->reg==FPI || opP->reg==FPS || opP->reg==FPC)) + losing++; + break; + + case 'S': + if(opP->mode!=MSCR || opP->reg!=SR) + losing++; + break; + + case 'U': + if(opP->mode!=MSCR || opP->reg!=USP) + losing++; + break; + + /* JF these are out of order. We could put them + in order if we were willing to put up with + bunches of #ifdef m68851s in the code */ +#ifndef NO_68851 + /* Memory addressing mode used by pflushr */ + case '|': + if(opP->mode==MSCR || opP->mode==DREG || + opP->mode==AREG || opP->mode==REGLST) + losing++; + break; + + case 'f': + if (opP->mode != MSCR || (opP->reg != SFC && opP->reg != DFC)) + losing++; + break; + + case 'P': + if (opP->mode != MSCR || (opP->reg != TC && opP->reg != CAL && + opP->reg != VAL && opP->reg != SCC && opP->reg != AC)) + losing++; + break; + + case 'V': + if (opP->reg != VAL) + losing++; + break; + + case 'W': + if (opP->mode != MSCR || (opP->reg != DRP && opP->reg != SRP && + opP->reg != CRP)) + losing++; + break; + + case 'X': + if (opP->mode != MSCR || + (!(opP->reg >= BAD && opP->reg <= BAD+7) && + !(opP->reg >= BAC && opP->reg <= BAC+7))) + losing++; + break; + + case 'Y': + if (opP->reg != PSR) + losing++; + break; + + case 'Z': + if (opP->reg != PCSR) + losing++; + break; +#endif + case 'c': + if (opP->reg != NC + && opP->reg != IC + && opP->reg != DC + && opP->reg != BC) { + losing++; + } /* not a cache specifier. */ + break; + + case '_': + if (opP->mode != ABSL) { + ++losing; + } /* not absolute */ + break; + + default: + as_fatal("Internal error: Operand mode %c unknown in line %s of file \"%s\"", + *s, __LINE__, __FILE__); + } /* switch on type of operand */ + + if (losing) break; + } /* for each operand */ + } /* if immediately wrong */ + + if (!losing) { + break; + } /* got it. */ + + + if (!opcode->m_next) + { + if ((opcode->m_arch & current_architecture) == 0) + { + the_ins.error = "Opcode not available on architecture specified"; + addword(0); + + } + else + { + the_ins.error = "instruction/operands mismatch"; + } + + return; + } /* Fell off the end */ + opcode = opcode->m_next; + losing = 0; + } + + /* now assemble it */ + + the_ins.args=opcode->m_operands; + the_ins.numargs=opcode->m_opnum; + the_ins.numo=opcode->m_codenum; + the_ins.opcode[0]=getone(opcode); + the_ins.opcode[1]=gettwo(opcode); + + for (s = the_ins.args, opP = &the_ins.operands[0]; *s; s += 2, opP++) { + /* This switch is a doozy. + Watch the first step; its a big one! */ + switch(s[0]) { + + case '*': + case '~': + case '%': + case ';': + case '@': + case '!': + case '&': + case '$': + case '?': + case '/': +#ifndef NO_68851 + case '|': +#endif + switch(opP->mode) { + case IMMED: + tmpreg=0x3c; /* 7.4 */ + if (strchr("bwl",s[1])) nextword=get_num(opP->con1,80); + else nextword=nextword=get_num(opP->con1,0); + if(isvar(opP->con1)) + add_fix(s[1],opP->con1,0); + switch(s[1]) { + case 'b': + if(!isbyte(nextword)) + opP->error="operand out of range"; + addword(nextword); + baseo=0; + break; + case 'w': + if(!isword(nextword)) + opP->error="operand out of range"; + addword(nextword); + baseo=0; + break; + case 'l': + addword(nextword>>16); + addword(nextword); + baseo=0; + break; + + case 'f': + baseo=2; + outro=8; + break; + case 'F': + baseo=4; + outro=11; + break; + case 'x': + baseo=6; + outro=15; + break; + case 'p': + baseo=6; + outro= -1; + break; + default: + as_fatal("Internal error: Can't decode %c%c in line %s of file \"%s\"", + *s, s[1], __LINE__, __FILE__); + } + if(!baseo) + break; + + /* We gotta put out some float */ + if(seg(opP->con1)!=SEG_BIG) { + int_to_gen(nextword); + gen_to_words(words,baseo,(long int)outro); + for(wordp=words;baseo--;wordp++) + addword(*wordp); + break; + } /* Its BIG */ + if(offs(opP->con1)>0) { + as_warn("Bignum assumed to be binary bit-pattern"); + if(offs(opP->con1)>baseo) { + as_warn("Bignum too big for %c format; truncated",s[1]); + offs(opP->con1)=baseo; + } + baseo-=offs(opP->con1); + for(wordp=generic_bignum+offs(opP->con1)-1;offs(opP->con1)--;--wordp) + addword(*wordp); + while(baseo--) + addword(0); + break; + } + gen_to_words(words,baseo,(long)outro); + for (wordp=words;baseo--;wordp++) + addword(*wordp); + break; + case DREG: + tmpreg=opP->reg-DATA; /* 0.dreg */ + break; + case AREG: + tmpreg=0x08+opP->reg-ADDR; /* 1.areg */ + break; + case AINDR: + tmpreg=0x10+opP->reg-ADDR; /* 2.areg */ + break; + case ADEC: + tmpreg=0x20+opP->reg-ADDR; /* 4.areg */ + break; + case AINC: + tmpreg=0x18+opP->reg-ADDR; /* 3.areg */ + break; + case AOFF: + + nextword=get_num(opP->con1,80); + /* Force into index mode. Hope this works */ + + /* We do the first bit for 32-bit displacements, + and the second bit for 16 bit ones. It is + possible that we should make the default be + WORD instead of LONG, but I think that'd + break GCC, so we put up with a little + inefficiency for the sake of working output. + */ + + if( !issword(nextword) + || ( isvar(opP->con1) + && ( ( opP->con1->e_siz==0 + && flagseen['l']==0) + || opP->con1->e_siz==3))) { + + if(opP->reg==PC) + tmpreg=0x3B; /* 7.3 */ + else + tmpreg=0x30+opP->reg-ADDR; /* 6.areg */ + if(isvar(opP->con1)) { + if(opP->reg==PC) { + add_frag(adds(opP->con1), + offs(opP->con1), + TAB(PCLEA,SZ_UNDEF)); + break; + } else { + addword(0x0170); + add_fix('l',opP->con1,1); + } + } else + addword(0x0170); + addword(nextword>>16); + } else { + if(opP->reg==PC) + tmpreg=0x3A; /* 7.2 */ + else + tmpreg=0x28+opP->reg-ADDR; /* 5.areg */ + + if(isvar(opP->con1)) { + if(opP->reg==PC) { + add_fix('w',opP->con1,1); + } else + add_fix('w',opP->con1,0); + } + } + addword(nextword); + break; + + case APODX: + case AMIND: + case APRDX: + know(current_architecture & m68020up); + /* intentional fall-through */ + case AINDX: + nextword=0; + baseo=get_num(opP->con1,80); + outro=get_num(opP->con2,80); + /* Figure out the 'addressing mode' */ + /* Also turn on the BASE_DISABLE bit, if needed */ + if(opP->reg==PC || opP->reg==ZPC) { + tmpreg=0x3b; /* 7.3 */ + if(opP->reg==ZPC) + nextword|=0x80; + } else if(opP->reg==FAIL) { + nextword|=0x80; + tmpreg=0x30; /* 6.garbage */ + } else tmpreg=0x30+opP->reg-ADDR; /* 6.areg */ + + siz1= (opP->con1) ? opP->con1->e_siz : 0; + siz2= (opP->con2) ? opP->con2->e_siz : 0; + + /* Index register stuff */ + if(opP->ireg>=DATA+0 && opP->ireg<=ADDR+7) { + nextword|=(opP->ireg-DATA)<<12; + + if(opP->isiz==0 || opP->isiz==3) + nextword|=0x800; + switch(opP->imul) { + case 1: break; + case 2: nextword|=0x200; break; + case 4: nextword|=0x400; break; + case 8: nextword|=0x600; break; + default: as_fatal("failed sanity check."); + } + /* IF its simple, + GET US OUT OF HERE! */ + + /* Must be INDEX, with an index + register. Address register + cannot be ZERO-PC, and either + :b was forced, or we know + it will fit */ + if( opP->mode==AINDX + && opP->reg!=FAIL + && opP->reg!=ZPC + && ( siz1==1 + || ( issbyte(baseo) + && !isvar(opP->con1)))) { + nextword +=baseo&0xff; + addword(nextword); + if(isvar(opP->con1)) + add_fix('B',opP->con1,0); + break; + } + } else + nextword|=0x40; /* No index reg */ + + /* It aint simple */ + nextword|=0x100; + /* If the guy specified a width, we assume that + it is wide enough. Maybe it isn't. If so, we lose + */ + switch(siz1) { + case 0: + if(isvar(opP->con1) || !issword(baseo)) { + siz1=3; + nextword|=0x30; + } else if(baseo==0) + nextword|=0x10; + else { + nextword|=0x20; + siz1=2; + } + break; + case 1: + as_warn("Byte dispacement won't work. Defaulting to :w"); + case 2: + nextword|=0x20; + break; + case 3: + nextword|=0x30; + break; + } + + /* Figure out innner displacement stuff */ + if(opP->mode!=AINDX) { + switch(siz2) { + case 0: + if(isvar(opP->con2) || !issword(outro)) { + siz2=3; + nextword|=0x3; + } else if(outro==0) + nextword|=0x1; + else { + nextword|=0x2; + siz2=2; + } + break; + case 1: + as_warn("Byte dispacement won't work. Defaulting to :w"); + case 2: + nextword|=0x2; + break; + case 3: + nextword|=0x3; + break; + } + if(opP->mode==APODX) nextword|=0x04; + else if(opP->mode==AMIND) nextword|=0x40; + } + addword(nextword); + + if(isvar(opP->con1)) { + if(opP->reg==PC || opP->reg==ZPC) { + add_fix(siz1==3 ? 'l' : 'w',opP->con1,1); + opP->con1->e_exp.X_add_number+=6; + } else + add_fix(siz1==3 ? 'l' : 'w',opP->con1,0); + } + if(siz1==3) + addword(baseo>>16); + if(siz1) + addword(baseo); + + if(isvar(opP->con2)) { + if(opP->reg==PC || opP->reg==ZPC) { + add_fix(siz2==3 ? 'l' : 'w',opP->con2,1); + opP->con1->e_exp.X_add_number+=6; + } else + add_fix(siz2==3 ? 'l' : 'w',opP->con2,0); + } + if(siz2==3) + addword(outro>>16); + if(siz2) + addword(outro); + + break; + + case ABSL: + nextword=get_num(opP->con1,80); + switch(opP->con1->e_siz) { + default: + as_warn("Unknown size for absolute reference"); + case 0: + if(!isvar(opP->con1) && issword(offs(opP->con1))) { + tmpreg=0x38; /* 7.0 */ + addword(nextword); + break; + } + /* Don't generate pc relative code + on 68010 and 68000 */ + if(isvar(opP->con1) + && !subs(opP->con1) + && seg(opP->con1) == SEG_TEXT + && now_seg == SEG_TEXT + && cpu_of_arch(current_architecture) < m68020 + && !flagseen['S'] + && !strchr("~%&$?", s[0])) { + tmpreg=0x3A; /* 7.2 */ + add_frag(adds(opP->con1), + offs(opP->con1), + TAB(PCREL,SZ_UNDEF)); + break; + } + case 3: /* Fall through into long */ + if(isvar(opP->con1)) + add_fix('l',opP->con1,0); + + tmpreg=0x39; /* 7.1 mode */ + addword(nextword>>16); + addword(nextword); + break; + + case 2: /* Word */ + if(isvar(opP->con1)) + add_fix('w',opP->con1,0); + + tmpreg=0x38; /* 7.0 mode */ + addword(nextword); + break; + } + break; + case MSCR: + default: + as_bad("unknown/incorrect operand"); + /* abort(); */ + } + install_gen_operand(s[1],tmpreg); + break; + + case '#': + case '^': + switch(s[1]) { /* JF: I hate floating point! */ + case 'j': + tmpreg=70; + break; + case '8': + tmpreg=20; + break; + case 'C': + tmpreg=50; + break; + case '3': + default: + tmpreg=80; + break; + } + tmpreg=get_num(opP->con1,tmpreg); + if(isvar(opP->con1)) + add_fix(s[1],opP->con1,0); + switch(s[1]) { + case 'b': /* Danger: These do no check for + certain types of overflow. + user beware! */ + if(!isbyte(tmpreg)) + opP->error="out of range"; + insop(tmpreg); + if(isvar(opP->con1)) + the_ins.reloc[the_ins.nrel-1].n=(opcode->m_codenum)*2; + break; + case 'w': + if(!isword(tmpreg)) + opP->error="out of range"; + insop(tmpreg); + if(isvar(opP->con1)) + the_ins.reloc[the_ins.nrel-1].n=(opcode->m_codenum)*2; + break; + case 'l': + insop(tmpreg); /* Because of the way insop works, we put these two out backwards */ + insop(tmpreg>>16); + if(isvar(opP->con1)) + the_ins.reloc[the_ins.nrel-1].n=(opcode->m_codenum)*2; + break; + case '3': + tmpreg&=0xFF; + case '8': + case 'C': + install_operand(s[1],tmpreg); + break; + default: + as_fatal("Internal error: Unknown mode #%c in line %s of file \"%s\"", s[1], __LINE__, __FILE__); + } + break; + + case '+': + case '-': + case 'A': + case 'a': + install_operand(s[1],opP->reg-ADDR); + break; + + case 'B': + tmpreg=get_num(opP->con1,80); + switch(s[1]) { + case 'B': + /* Needs no offsetting */ + add_fix('B',opP->con1,1); + break; + case 'W': + /* Offset the displacement to be relative to byte disp location */ + opP->con1->e_exp.X_add_number+=2; + add_fix('w',opP->con1,1); + addword(0); + break; + case 'L': + long_branch: + if (cpu_of_arch(current_architecture) < m68020) /* 68000 or 010 */ + as_warn("Can't use long branches on 68000/68010"); + the_ins.opcode[the_ins.numo-1]|=0xff; + /* Offset the displacement to be relative to byte disp location */ + opP->con1->e_exp.X_add_number+=4; + add_fix('l',opP->con1,1); + addword(0); + addword(0); + break; + case 'g': + if(subs(opP->con1)) /* We can't relax it */ + goto long_branch; + + /* This could either be a symbol, or an + absolute address. No matter, the + frag hacking will finger it out. + Not quite: it can't switch from + BRANCH to BCC68000 for the case + where opnd is absolute (it needs + to use the 68000 hack since no + conditional abs jumps). */ + if (((cpu_of_arch(current_architecture) < m68020) || (0==adds(opP->con1))) + && (the_ins.opcode[0] >= 0x6200) + && (the_ins.opcode[0] <= 0x6f00)) { + add_frag(adds(opP->con1),offs(opP->con1),TAB(BCC68000,SZ_UNDEF)); + } else { + add_frag(adds(opP->con1),offs(opP->con1),TAB(BRANCH,SZ_UNDEF)); + } + break; + case 'w': + if(isvar(opP->con1)) { + /* check for DBcc instruction */ + if ((the_ins.opcode[0] & 0xf0f8) ==0x50c8) { + /* size varies if patch */ + /* needed for long form */ + add_frag(adds(opP->con1),offs(opP->con1),TAB(DBCC,SZ_UNDEF)); + break; + } + + /* Don't ask! */ + opP->con1->e_exp.X_add_number+=2; + add_fix('w',opP->con1,1); + } + addword(0); + break; + case 'C': /* Fixed size LONG coproc branches */ + the_ins.opcode[the_ins.numo-1]|=0x40; + /* Offset the displacement to be relative to byte disp location */ + /* Coproc branches don't have a byte disp option, but they are + compatible with the ordinary branches, which do... */ + opP->con1->e_exp.X_add_number+=4; + add_fix('l',opP->con1,1); + addword(0); + addword(0); + break; + case 'c': /* Var size Coprocesssor branches */ + if(subs(opP->con1)) { + add_fix('l',opP->con1,1); + add_frag((symbolS *)0,(long)0,TAB(FBRANCH,LONG)); + } else if(adds(opP->con1)) { + add_frag(adds(opP->con1),offs(opP->con1),TAB(FBRANCH,SZ_UNDEF)); + } else { + /* add_frag((symbolS *)0,offs(opP->con1),TAB(FBRANCH,SHORT)); */ + the_ins.opcode[the_ins.numo-1]|=0x40; + add_fix('l',opP->con1,1); + addword(0); + addword(4); + } + break; + default: + as_fatal("Internal error: operand type B%c unknown in line %s of file \"%s\"", + s[1], __LINE__, __FILE__); + } + break; + + case 'C': /* Ignore it */ + break; + + case 'd': /* JF this is a kludge */ + if(opP->mode==AOFF) { + install_operand('s',opP->reg-ADDR); + } else { + char *tmpP; + + tmpP=opP->con1->e_end-2; + opP->con1->e_beg++; + opP->con1->e_end-=4; /* point to the , */ + baseo=m68k_reg_parse(&tmpP); + if(baseo<ADDR+0 || baseo>ADDR+7) { + as_bad("Unknown address reg, using A0"); + baseo=0; + } else baseo-=ADDR; + install_operand('s',baseo); + } + tmpreg=get_num(opP->con1,80); + if(!issword(tmpreg)) { + as_warn("Expression out of range, using 0"); + tmpreg=0; + } + addword(tmpreg); + break; + + case 'D': + install_operand(s[1],opP->reg-DATA); + break; + + case 'F': + install_operand(s[1],opP->reg-FPREG); + break; + + case 'I': + tmpreg=1+opP->reg-COPNUM; + if(tmpreg==8) + tmpreg=0; + install_operand(s[1],tmpreg); + break; + + case 'J': /* JF foo */ + switch(opP->reg) { + case SFC: tmpreg=0x000; break; + case DFC: tmpreg=0x001; break; + case CACR: tmpreg=0x002; break; + case TC: tmpreg=0x003; break; + case ITT0: tmpreg=0x004; break; + case ITT1: tmpreg=0x005; break; + case DTT0: tmpreg=0x006; break; + case DTT1: tmpreg=0x007; break; + + case USP: tmpreg=0x800; break; + case VBR: tmpreg=0x801; break; + case CAAR: tmpreg=0x802; break; + case MSP: tmpreg=0x803; break; + case ISP: tmpreg=0x804; break; + case MMUSR: tmpreg=0x805; break; + case URP: tmpreg=0x806; break; + case SRP: tmpreg=0x807; break; + default: + as_fatal("failed sanity check."); + } + install_operand(s[1],tmpreg); + break; + + case 'k': + tmpreg=get_num(opP->con1,55); + install_operand(s[1],tmpreg&0x7f); + break; + + case 'l': + tmpreg=opP->reg; + if(s[1]=='w') { + if(tmpreg&0x7FF0000) + as_bad("Floating point register in register list"); + insop(reverse_16_bits(tmpreg)); + } else { + if(tmpreg&0x700FFFF) + as_bad("Wrong register in floating-point reglist"); + install_operand(s[1],reverse_8_bits(tmpreg>>16)); + } + break; + + case 'L': + tmpreg=opP->reg; + if(s[1]=='w') { + if(tmpreg&0x7FF0000) + as_bad("Floating point register in register list"); + insop(tmpreg); + } else if(s[1]=='8') { + if(tmpreg&0x0FFFFFF) + as_bad("incorrect register in reglist"); + install_operand(s[1],tmpreg>>24); + } else { + if(tmpreg&0x700FFFF) + as_bad("wrong register in floating-point reglist"); + else + install_operand(s[1],tmpreg>>16); + } + break; + + case 'M': + install_operand(s[1],get_num(opP->con1,60)); + break; + + case 'O': + tmpreg= (opP->mode==DREG) + ? 0x20+opP->reg-DATA + : (get_num(opP->con1,40)&0x1F); + install_operand(s[1],tmpreg); + break; + + case 'Q': + tmpreg=get_num(opP->con1,10); + if(tmpreg==8) + tmpreg=0; + install_operand(s[1],tmpreg); + break; + + case 'R': + /* This depends on the fact that ADDR registers are + eight more than their corresponding DATA regs, so + the result will have the ADDR_REG bit set */ + install_operand(s[1],opP->reg-DATA); + break; + + case 's': + if(opP->reg==FPI) tmpreg=0x1; + else if(opP->reg==FPS) tmpreg=0x2; + else if(opP->reg==FPC) tmpreg=0x4; + else as_fatal("failed sanity check."); + install_operand(s[1],tmpreg); + break; + + case 'S': /* Ignore it */ + break; + + case 'T': + install_operand(s[1],get_num(opP->con1,30)); + break; + + case 'U': /* Ignore it */ + break; + + case 'c': + switch (opP->reg) { + case NC: tmpreg = 0; break; + case DC: tmpreg = 1; break; + case IC: tmpreg = 2; break; + case BC: tmpreg = 3; break; + default: + as_fatal("failed sanity check"); + } /* switch on cache token */ + install_operand(s[1], tmpreg); + break; +#ifndef NO_68851 + /* JF: These are out of order, I fear. */ + case 'f': + switch (opP->reg) { + case SFC: + tmpreg=0; + break; + case DFC: + tmpreg=1; + break; + default: + as_fatal("failed sanity check."); + } + install_operand(s[1],tmpreg); + break; + + case 'P': + switch(opP->reg) { + case TC: + tmpreg=0; + break; + case CAL: + tmpreg=4; + break; + case VAL: + tmpreg=5; + break; + case SCC: + tmpreg=6; + break; + case AC: + tmpreg=7; + break; + default: + as_fatal("failed sanity check."); + } + install_operand(s[1],tmpreg); + break; + + case 'V': + if (opP->reg == VAL) + break; + as_fatal("failed sanity check."); + + case 'W': + switch(opP->reg) { + + case DRP: + tmpreg=1; + break; + case SRP: + tmpreg=2; + break; + case CRP: + tmpreg=3; + break; + default: + as_fatal("failed sanity check."); + } + install_operand(s[1],tmpreg); + break; + + case 'X': + switch (opP->reg) { + case BAD: case BAD+1: case BAD+2: case BAD+3: + case BAD+4: case BAD+5: case BAD+6: case BAD+7: + tmpreg = (4 << 10) | ((opP->reg - BAD) << 2); + break; + + case BAC: case BAC+1: case BAC+2: case BAC+3: + case BAC+4: case BAC+5: case BAC+6: case BAC+7: + tmpreg = (5 << 10) | ((opP->reg - BAC) << 2); + break; + + default: + as_fatal("failed sanity check."); + } + install_operand(s[1], tmpreg); + break; + case 'Y': + know(opP->reg == PSR); + break; + case 'Z': + know(opP->reg == PCSR); + break; +#endif /* m68851 */ + case '_': + tmpreg=get_num(opP->con1,80); + install_operand(s[1], tmpreg); + break; + default: + as_fatal("Internal error: Operand type %c unknown in line %s of file \"%s\"", s[0], __LINE__, __FILE__); + } + } + /* By the time whe get here (FINALLY) the_ins contains the complete + instruction, ready to be emitted. . . */ +} /* m68k_ip() */ + +/* + * get_regs := '/' + ? + * | '-' + <register> + * | '-' + <register> + ? + * | <empty> + * ; + * + + * The idea here must be to scan in a set of registers but I don't + * understand it. Looks awfully sloppy to me but I don't have any doc on + * this format so... + + * + * + */ + +static int get_regs(i,str,opP) +int i; +struct m68k_op *opP; +char *str; +{ + /* 26, 25, 24, 23-16, 15-8, 0-7 */ + /* Low order 24 bits encoded fpc,fps,fpi,fp7-fp0,a7-a0,d7-d0 */ + unsigned long cur_regs = 0; + int reg1, + reg2; + +#define ADD_REG(x) { if(x==FPI) cur_regs|=(1<<24);\ + else if(x==FPS) cur_regs|=(1<<25);\ + else if(x==FPC) cur_regs|=(1<<26);\ + else cur_regs|=(1<<(x-1)); } + + reg1=i; + for(;;) { + if(*str=='/') { + ADD_REG(reg1); + str++; + } else if(*str=='-') { + str++; + reg2=m68k_reg_parse(&str); + if(reg2<DATA || reg2>=FPREG+8 || reg1==FPI || reg1==FPS || reg1==FPC) { + opP->error="unknown register in register list"; + return FAIL; + } + while(reg1<=reg2) { + ADD_REG(reg1); + reg1++; + } + if(*str=='\0') + break; + } else if(*str=='\0') { + ADD_REG(reg1); + break; + } else { + opP->error="unknow character in register list"; + return FAIL; + } +/* DJA -- Bug Fix. Did't handle d1-d2/a1 until the following instruction was added */ + if (*str=='/') + str ++; + reg1=m68k_reg_parse(&str); + if((reg1<DATA || reg1>=FPREG+8) && !(reg1==FPI || reg1==FPS || reg1==FPC)) { + opP->error="unknown register in register list"; + return FAIL; + } + } + opP->reg=cur_regs; + return OK; +} /* get_regs() */ + +static int reverse_16_bits(in) +int in; +{ + int out=0; + int n; + + static int mask[16] = { +0x0001,0x0002,0x0004,0x0008,0x0010,0x0020,0x0040,0x0080, +0x0100,0x0200,0x0400,0x0800,0x1000,0x2000,0x4000,0x8000 + }; + for(n=0;n<16;n++) { + if(in&mask[n]) + out|=mask[15-n]; + } + return out; +} /* reverse_16_bits() */ + +static int reverse_8_bits(in) +int in; +{ + int out=0; + int n; + + static int mask[8] = { +0x0001,0x0002,0x0004,0x0008,0x0010,0x0020,0x0040,0x0080, + }; + + for(n=0;n<8;n++) { + if(in&mask[n]) + out|=mask[7-n]; + } + return out; +} /* reverse_8_bits() */ + +static void install_operand(mode,val) +int mode; +int val; +{ + switch(mode) { + case 's': + the_ins.opcode[0]|=val & 0xFF; /* JF FF is for M kludge */ + break; + case 'd': + the_ins.opcode[0]|=val<<9; + break; + case '1': + the_ins.opcode[1]|=val<<12; + break; + case '2': + the_ins.opcode[1]|=val<<6; + break; + case '3': + the_ins.opcode[1]|=val; + break; + case '4': + the_ins.opcode[2]|=val<<12; + break; + case '5': + the_ins.opcode[2]|=val<<6; + break; + case '6': + /* DANGER! This is a hack to force cas2l and cas2w cmds + to be three words long! */ + the_ins.numo++; + the_ins.opcode[2]|=val; + break; + case '7': + the_ins.opcode[1]|=val<<7; + break; + case '8': + the_ins.opcode[1]|=val<<10; + break; +#ifndef NO_68851 + case '9': + the_ins.opcode[1]|=val<<5; + break; +#endif + + case 't': + the_ins.opcode[1]|=(val<<10)|(val<<7); + break; + case 'D': + the_ins.opcode[1]|=(val<<12)|val; + break; + case 'g': + the_ins.opcode[0]|=val=0xff; + break; + case 'i': + the_ins.opcode[0]|=val<<9; + break; + case 'C': + the_ins.opcode[1]|=val; + break; + case 'j': + the_ins.opcode[1]|=val; + the_ins.numo++; /* What a hack */ + break; + case 'k': + the_ins.opcode[1]|=val<<4; + break; + case 'b': + case 'w': + case 'l': + break; + case 'e': + the_ins.opcode[0] |= (val << 6); + break; + case 'L': + the_ins.opcode[1] = (val >> 16); + the_ins.opcode[2] = val & 0xffff; + break; + case 'c': + default: + as_fatal("failed sanity check."); + } +} /* install_operand() */ + +static void install_gen_operand(mode,val) +int mode; +int val; +{ + switch(mode) { + case 's': + the_ins.opcode[0]|=val; + break; + case 'd': + /* This is a kludge!!! */ + the_ins.opcode[0]|=(val&0x07)<<9|(val&0x38)<<3; + break; + case 'b': + case 'w': + case 'l': + case 'f': + case 'F': + case 'x': + case 'p': + the_ins.opcode[0]|=val; + break; + /* more stuff goes here */ + default: + as_fatal("failed sanity check."); + } +} /* install_gen_operand() */ + +/* + * verify that we have some number of paren pairs, do m68k_ip_op(), and + * then deal with the bitfield hack. + */ + +static char *crack_operand(str,opP) +register char *str; +register struct m68k_op *opP; +{ + register int parens; + register int c; + register char *beg_str; + + if(!str) { + return str; + } + beg_str=str; + for(parens=0;*str && (parens>0 || notend(str));str++) { + if(*str=='(') parens++; + else if(*str==')') { + if(!parens) { /* ERROR */ + opP->error="Extra )"; + return str; + } + --parens; + } + } + if(!*str && parens) { /* ERROR */ + opP->error="Missing )"; + return str; + } + c= *str; + *str='\0'; + if(m68k_ip_op(beg_str,opP)==FAIL) { + *str=c; + return str; + } + *str=c; + + if(c=='}') + c= *++str; /* JF bitfield hack */ + + if(c) { + c= *++str; + if(!c) + as_bad("Missing operand"); + } + return str; +} + +/* See the comment up above where the #define notend(... is */ +#if 0 +notend(s) +char *s; +{ + if(*s==',') return 0; + if(*s=='{' || *s=='}') + return 0; + if(*s!=':') return 1; + /* This kludge here is for the division cmd, which is a kludge */ + if(index("aAdD#",s[1])) return 0; + return 1; +} +#endif + + +int done_pseudo(str) +char *str; +{ + extern struct hash_control * po_hash; + char *ptr = str; + char *null_ptr; + pseudo_typeS * pop; + + char c; + + is_end_of_line[0] = 1; + /* Skip over name of pseudo, change to lower case */ + while (isalpha(*ptr) || *ptr == '.') + { + if (isupper(*ptr)) { + *ptr = tolower(*ptr); + } + ptr++; + } + null_ptr = ptr; + c = *null_ptr; + *null_ptr = 0; + + + pop = (pseudo_typeS *)hash_find(po_hash, str); + + *null_ptr = c; + if (pop != (pseudo_typeS *)NULL) + { + input_line_pointer = null_ptr+1; + SKIP_WHITESPACE(); + /* Now we point to first non-blank char after pseudo op */ + (*pop->poc_handler)(pop->poc_val); + input_line_pointer--; + + return 1; + + } + /* Just put back the char where the null was put and return as if nothing had happened */ + + *null_ptr = c; + return 0; + +} + + +/* This is the guts of the machine-dependent assembler. STR points to a + machine dependent instruction. This function is supposed to emit + the frags/bytes it assembles to. + */ +void +md_assemble(str) +char *str; +{ + char *er; + short *fromP; + char *toP = NULL; + int m,n = 0; + char *to_beg_P; + int shorts_this_frag; + +/* if (done_pseudo(str)) return ;*/ + + + + if (current_architecture == 0) { + current_architecture = (m68020 +#ifndef NO_68881 + | m68881 +#endif +#ifndef NO_68851 + | m68851 +#endif + ); + } /* default current_architecture */ + + bzero((char *)(&the_ins),sizeof(the_ins)); /* JF for paranoia sake */ + + m68k_ip(str); + er=the_ins.error; + if(!er) { + for(n=the_ins.numargs;n;--n) + if(the_ins.operands[n].error) { + er=the_ins.operands[n].error; + break; + } + } + if(er) { + as_bad("\"%s\" -- Statement '%s' ignored",er,str); + return; + } + + if(the_ins.nfrag==0) { /* No frag hacking involved; just put it out */ + toP=frag_more(2*the_ins.numo); + fromP= &the_ins.opcode[0]; + for(m=the_ins.numo;m;--m) { + md_number_to_chars(toP,(long)(*fromP),2); + toP+=2; + fromP++; + } + /* put out symbol-dependent info */ + for(m=0;m<the_ins.nrel;m++) { + switch(the_ins.reloc[m].wid) { + case 'B': + n=1; + break; + case 'b': + n=1; + break; + case '3': + n=2; + break; + case 'w': + n=2; + break; + case 'l': + n=4; + break; + default: + as_fatal("Don't know how to figure width of %c in md_assemble()",the_ins.reloc[m].wid); + } + + fix_new(frag_now, + (toP-frag_now->fr_literal)-the_ins.numo*2+the_ins.reloc[m].n, + n, + the_ins.reloc[m].add, + the_ins.reloc[m].sub, + the_ins.reloc[m].off, + the_ins.reloc[m].pcrel, + NO_RELOC); + } + return; + } + + /* There's some frag hacking */ + for(n=0,fromP= &the_ins.opcode[0];n<the_ins.nfrag;n++) { + int wid; + + if(n==0) wid=2*the_ins.fragb[n].fragoff; + else wid=2*(the_ins.numo-the_ins.fragb[n-1].fragoff); + toP=frag_more(wid); + to_beg_P=toP; + shorts_this_frag=0; + for(m=wid/2;m;--m) { + md_number_to_chars(toP,(long)(*fromP),2); + toP+=2; + fromP++; + shorts_this_frag++; + } + for(m=0;m<the_ins.nrel;m++) { + if((the_ins.reloc[m].n)>= 2*shorts_this_frag /* 2*the_ins.fragb[n].fragoff */) { + the_ins.reloc[m].n-= 2*shorts_this_frag /* 2*the_ins.fragb[n].fragoff */; + break; + } + wid=the_ins.reloc[m].wid; + if(wid==0) + continue; + the_ins.reloc[m].wid=0; + wid = (wid=='b') ? 1 : (wid=='w') ? 2 : (wid=='l') ? 4 : 4000; + + fix_new(frag_now, + (toP-frag_now->fr_literal)-the_ins.numo*2+the_ins.reloc[m].n, + wid, + the_ins.reloc[m].add, + the_ins.reloc[m].sub, + the_ins.reloc[m].off, + the_ins.reloc[m].pcrel, + NO_RELOC); + } + /* know(the_ins.fragb[n].fadd); */ + (void)frag_var(rs_machine_dependent,10,0,(relax_substateT)(the_ins.fragb[n].fragty), + the_ins.fragb[n].fadd,the_ins.fragb[n].foff,to_beg_P); + } + n=(the_ins.numo-the_ins.fragb[n-1].fragoff); + shorts_this_frag=0; + if(n) { + toP=frag_more(n*sizeof(short)); + while(n--) { + md_number_to_chars(toP,(long)(*fromP),2); + toP+=2; + fromP++; + shorts_this_frag++; + } + } + for(m=0;m<the_ins.nrel;m++) { + int wid; + + wid=the_ins.reloc[m].wid; + if(wid==0) + continue; + the_ins.reloc[m].wid=0; + wid = (wid=='b') ? 1 : (wid=='w') ? 2 : (wid=='l') ? 4 : 4000; + + fix_new(frag_now, + (the_ins.reloc[m].n + toP-frag_now->fr_literal)- /* the_ins.numo */ shorts_this_frag*2, + wid, + the_ins.reloc[m].add, + the_ins.reloc[m].sub, + the_ins.reloc[m].off, + the_ins.reloc[m].pcrel, + NO_RELOC); + } +} + +/* This function is called once, at assembler startup time. This should + set up all the tables, etc that the MD part of the assembler needs + */ +void +md_begin() +{ +/* + * md_begin -- set up hash tables with 68000 instructions. + * similar to what the vax assembler does. ---phr + */ + /* RMS claims the thing to do is take the m68k-opcode.h table, and make + a copy of it at runtime, adding in the information we want but isn't + there. I think it'd be better to have an awk script hack the table + at compile time. Or even just xstr the table and use it as-is. But + my lord ghod hath spoken, so we do it this way. Excuse the ugly var + names. */ + + register const struct m68k_opcode *ins; + register struct m68k_incant *hack, + *slak; + register char *retval = 0; /* empty string, or error msg text */ + register unsigned int i; + register char c; + + if ((op_hash = hash_new()) == NULL) + as_fatal("Virtual memory exhausted"); + + obstack_begin(&robyn,4000); + for (ins = m68k_opcodes; ins < endop; ins++) { + hack=slak=(struct m68k_incant *)obstack_alloc(&robyn,sizeof(struct m68k_incant)); + do { + /* we *could* ignore insns that don't match our + arch here but just leaving them out of the + hash. */ + slak->m_operands=ins->args; + slak->m_opnum=strlen(slak->m_operands)/2; + slak->m_arch = ins->arch; + slak->m_opcode=ins->opcode; + /* This is kludgey */ + slak->m_codenum=((ins->match)&0xffffL) ? 2 : 1; + if((ins+1)!=endop && !strcmp(ins->name,(ins+1)->name)) { + slak->m_next=(struct m68k_incant *) obstack_alloc(&robyn,sizeof(struct m68k_incant)); + ins++; + } else + slak->m_next=0; + slak=slak->m_next; + } while(slak); + + retval = hash_insert (op_hash, ins->name,(char *)hack); + /* Didn't his mommy tell him about null pointers? */ + if(retval && *retval) + as_fatal("Internal Error: Can't hash %s: %s",ins->name,retval); + } + + for (i = 0; i < sizeof(mklower_table) ; i++) + mklower_table[i] = (isupper(c = (char) i)) ? tolower(c) : c; + + for (i = 0 ; i < sizeof(notend_table) ; i++) { + notend_table[i] = 0; + alt_notend_table[i] = 0; + } + notend_table[','] = 1; + notend_table['{'] = 1; + notend_table['}'] = 1; + alt_notend_table['a'] = 1; + alt_notend_table['A'] = 1; + alt_notend_table['d'] = 1; + alt_notend_table['D'] = 1; + alt_notend_table['#'] = 1; + alt_notend_table['f'] = 1; + alt_notend_table['F'] = 1; + +#ifdef REGISTER_PREFIX + alt_notend_table[REGISTER_PREFIX] = 1; +#endif + + +} + +#if 0 +#define notend(s) ((*s == ',' || *s == '}' || *s == '{' \ + || (*s == ':' && strchr("aAdD#", s[1]))) \ + ? 0 : 1) +#endif + +/* This funciton is called once, before the assembler exits. It is + supposed to do any final cleanup for this part of the assembler. + */ +void +md_end() +{ +} + +/* Equal to MAX_PRECISION in atof-ieee.c */ +#define MAX_LITTLENUMS 6 + +/* Turn a string in str into a floating point constant of type + type, and store the appropriate bytes in *litP. The number of LITTLENUMS + emitted is stored in *sizeP . An error message is returned, or NULL on OK. + */ +char * +md_atof(type,litP,sizeP) +char type; +char *litP; +int *sizeP; +{ + int prec; + LITTLENUM_TYPE words[MAX_LITTLENUMS]; + LITTLENUM_TYPE *wordP; + char *t; + char *atof_ieee(); + + switch(type) { + case 'f': + case 'F': + case 's': + case 'S': + prec = 2; + break; + + case 'd': + case 'D': + case 'r': + case 'R': + prec = 4; + break; + + case 'x': + case 'X': + prec = 6; + break; + + case 'p': + case 'P': + prec = 6; + break; + + default: + *sizeP=0; + return "Bad call to MD_ATOF()"; + } + t=atof_ieee(input_line_pointer,type,words); + if(t) + input_line_pointer=t; + + *sizeP=prec * sizeof(LITTLENUM_TYPE); + for(wordP=words;prec--;) { + md_number_to_chars(litP,(long)(*wordP++),sizeof(LITTLENUM_TYPE)); + litP+=sizeof(LITTLENUM_TYPE); + } + return ""; /* Someone should teach Dean about null pointers */ +} + +/* Turn an integer of n bytes (in val) into a stream of bytes appropriate + for use in the a.out file, and stores them in the array pointed to by buf. + This knows about the endian-ness of the target machine and does + THE RIGHT THING, whatever it is. Possible values for n are 1 (byte) + 2 (short) and 4 (long) Floating numbers are put out as a series of + LITTLENUMS (shorts, here at least) + */ +void +md_number_to_chars(buf,val,n) +char *buf; +long val; +int n; +{ + switch(n) { + case 1: + *buf++=val; + break; + case 2: + *buf++=(val>>8); + *buf++=val; + break; + case 4: + *buf++=(val>>24); + *buf++=(val>>16); + *buf++=(val>>8); + *buf++=val; + break; + default: + as_fatal("failed sanity check."); + } +} + +void +md_apply_fix(fixP, val) + fixS *fixP; + long val; +{ + char *buf = fixP->fx_where + fixP->fx_frag->fr_literal; + + switch(fixP->fx_size) { + case 1: + *buf++=val; + break; + case 2: + *buf++=(val>>8); + *buf++=val; + break; + case 4: + *buf++=(val>>24); + *buf++=(val>>16); + *buf++=(val>>8); + *buf++=val; + break; + default: + BAD_CASE (fixP->fx_size); + } +} + + +/* *fragP has been relaxed to its final size, and now needs to have + the bytes inside it modified to conform to the new size There is UGLY + MAGIC here. .. + */ +void +md_convert_frag(headers, fragP) +object_headers *headers; +register fragS *fragP; +{ + long disp; + long ext = 0; + + /* Address in object code of the displacement. */ + register int object_address = fragP -> fr_fix + fragP -> fr_address; + +#ifdef IBM_COMPILER_SUX + /* This is wrong but it convinces the native rs6000 compiler to + generate the code we want. */ + register char *buffer_address = fragP -> fr_literal; + buffer_address += fragP -> fr_fix; +#else /* IBM_COMPILER_SUX */ + /* Address in gas core of the place to store the displacement. */ + register char *buffer_address = fragP->fr_fix + fragP->fr_literal; +#endif /* IBM_COMPILER_SUX */ + + /* No longer true: know(fragP->fr_symbol); */ + + /* The displacement of the address, from current location. */ + disp = fragP->fr_symbol ? S_GET_VALUE(fragP->fr_symbol) : 0; + disp = (disp + fragP->fr_offset) - object_address; + + switch(fragP->fr_subtype) { + case TAB(BCC68000,BYTE): + case TAB(BRANCH,BYTE): + know(issbyte(disp)); + if(disp==0) + as_bad("short branch with zero offset: use :w"); + fragP->fr_opcode[1]=disp; + ext=0; + break; + case TAB(DBCC,SHORT): + know(issword(disp)); + ext=2; + break; + case TAB(BCC68000,SHORT): + case TAB(BRANCH,SHORT): + know(issword(disp)); + fragP->fr_opcode[1]=0x00; + ext=2; + break; + case TAB(BRANCH,LONG): + if (cpu_of_arch(current_architecture) < m68020) { + if (fragP->fr_opcode[0]==0x61) { + fragP->fr_opcode[0]= 0x4E; + fragP->fr_opcode[1]= 0xB9; /* JBSR with ABSL LONG offset */ + subseg_change(SEG_TEXT, 0); + + fix_new(fragP, + fragP->fr_fix, + 4, + fragP->fr_symbol, + 0, + fragP->fr_offset, + 0, + NO_RELOC); + + fragP->fr_fix+=4; + ext=0; + } else if (fragP->fr_opcode[0]==0x60) { + fragP->fr_opcode[0]= 0x4E; + fragP->fr_opcode[1]= 0xF9; /* JMP with ABSL LONG offset */ + subseg_change(SEG_TEXT, 0); + fix_new(fragP, fragP->fr_fix, 4, fragP->fr_symbol, 0, fragP->fr_offset,0, + NO_RELOC); + fragP->fr_fix+=4; + ext=0; + } else { + as_bad("Long branch offset not supported."); + } + } else { + fragP->fr_opcode[1]=0xff; + ext=4; + } + break; + case TAB(BCC68000,LONG): + /* only Bcc 68000 instructions can come here */ + /* change bcc into b!cc/jmp absl long */ + fragP->fr_opcode[0] ^= 0x01; /* invert bcc */ + fragP->fr_opcode[1] = 0x6; /* branch offset = 6 */ + + /* JF: these used to be fr_opcode[2,3], but they may be in a + different frag, in which case refering to them is a no-no. + Only fr_opcode[0,1] are guaranteed to work. */ + *buffer_address++ = 0x4e; /* put in jmp long (0x4ef9) */ + *buffer_address++ = 0xf9; + fragP->fr_fix += 2; /* account for jmp instruction */ + subseg_change(SEG_TEXT,0); + fix_new(fragP, fragP->fr_fix, 4, fragP->fr_symbol, 0, + fragP->fr_offset,0, + NO_RELOC); + fragP->fr_fix += 4; + ext=0; + break; + case TAB(DBCC,LONG): + /* only DBcc 68000 instructions can come here */ + /* change dbcc into dbcc/jmp absl long */ + /* JF: these used to be fr_opcode[2-7], but that's wrong */ + *buffer_address++ = 0x00; /* branch offset = 4 */ + *buffer_address++ = 0x04; + *buffer_address++ = 0x60; /* put in bra pc+6 */ + *buffer_address++ = 0x06; + *buffer_address++ = 0x4e; /* put in jmp long (0x4ef9) */ + *buffer_address++ = 0xf9; + + fragP->fr_fix += 6; /* account for bra/jmp instructions */ + subseg_change(SEG_TEXT,0); + fix_new(fragP, fragP->fr_fix, 4, fragP->fr_symbol, 0, + fragP->fr_offset,0, + NO_RELOC); + fragP->fr_fix += 4; + ext=0; + break; + case TAB(FBRANCH,SHORT): + know((fragP->fr_opcode[1]&0x40)==0); + ext=2; + break; + case TAB(FBRANCH,LONG): + fragP->fr_opcode[1]|=0x40; /* Turn on LONG bit */ + ext=4; + break; + case TAB(PCREL,SHORT): + ext=2; + break; + case TAB(PCREL,LONG): + /* The thing to do here is force it to ABSOLUTE LONG, since + PCREL is really trying to shorten an ABSOLUTE address anyway */ + /* JF FOO This code has not been tested */ + subseg_change(SEG_TEXT,0); + fix_new(fragP, fragP->fr_fix, 4, fragP->fr_symbol, 0, fragP->fr_offset, 0, NO_RELOC); + if((fragP->fr_opcode[1] & 0x3F) != 0x3A) + as_bad("Internal error (long PC-relative operand) for insn 0x%04lx at 0x%lx", + fragP->fr_opcode[0],fragP->fr_address); + fragP->fr_opcode[1]&= ~0x3F; + fragP->fr_opcode[1]|=0x39; /* Mode 7.1 */ + fragP->fr_fix+=4; + /* md_number_to_chars(buffer_address, + (long)(fragP->fr_symbol->sy_value + fragP->fr_offset), + 4); */ + ext=0; + break; + case TAB(PCLEA,SHORT): + subseg_change(SEG_TEXT,0); + fix_new(fragP,(int)(fragP->fr_fix),2,fragP->fr_symbol,(symbolS *)0,fragP->fr_offset,1, + NO_RELOC); + fragP->fr_opcode[1] &= ~0x3F; + fragP->fr_opcode[1] |= 0x3A; + ext=2; + break; + case TAB(PCLEA,LONG): + subseg_change(SEG_TEXT,0); + fix_new(fragP,(int)(fragP->fr_fix)+2,4,fragP->fr_symbol,(symbolS *)0,fragP->fr_offset+2,1, + NO_RELOC); + *buffer_address++ = 0x01; + *buffer_address++ = 0x70; + fragP->fr_fix+=2; + /* buffer_address+=2; */ + ext=4; + break; + + } /* switch on subtype */ + + if (ext) { + md_number_to_chars(buffer_address, (long) disp, (int) ext); + fragP->fr_fix += ext; +/* H_SET_TEXT_SIZE(headers, H_GET_TEXT_SIZE(headers) + ext); */ + } /* if extending */ + + return; +} /* md_convert_frag() */ + +/* Force truly undefined symbols to their maximum size, and generally set up + the frag list to be relaxed + */ +int md_estimate_size_before_relax(fragP, segment) +register fragS *fragP; +segT segment; +{ + int old_fix; + register char *buffer_address = fragP->fr_fix + fragP->fr_literal; + + old_fix = fragP->fr_fix; + + /* handle SZ_UNDEF first, it can be changed to BYTE or SHORT */ + switch(fragP->fr_subtype) { + + case TAB(BRANCH,SZ_UNDEF): { + if((fragP->fr_symbol != NULL) /* Not absolute */ + && S_GET_SEGMENT(fragP->fr_symbol) == segment) { + fragP->fr_subtype=TAB(TABTYPE(fragP->fr_subtype),BYTE); + break; + } else if((fragP->fr_symbol == 0) || (cpu_of_arch(current_architecture) < m68020)) { + /* On 68000, or for absolute value, switch to abs long */ + /* FIXME, we should check abs val, pick short or long */ + if(fragP->fr_opcode[0]==0x61) { + fragP->fr_opcode[0]= 0x4E; + fragP->fr_opcode[1]= 0xB9; /* JBSR with ABSL LONG offset */ + subseg_change(SEG_TEXT, 0); + fix_new(fragP, fragP->fr_fix, 4, + fragP->fr_symbol, 0, fragP->fr_offset, 0, NO_RELOC); + fragP->fr_fix+=4; + frag_wane(fragP); + } else if(fragP->fr_opcode[0]==0x60) { + fragP->fr_opcode[0]= 0x4E; + fragP->fr_opcode[1]= 0xF9; /* JMP with ABSL LONG offset */ + subseg_change(SEG_TEXT, 0); + fix_new(fragP, fragP->fr_fix, 4, + fragP->fr_symbol, 0, fragP->fr_offset, 0, NO_RELOC); + fragP->fr_fix+=4; + frag_wane(fragP); + } else { + as_warn("Long branch offset to extern symbol not supported."); + } + } else { /* Symbol is still undefined. Make it simple */ + fix_new(fragP, (int)(fragP->fr_fix), 4, fragP->fr_symbol, + (symbolS *)0, fragP->fr_offset+4, 1, NO_RELOC); + fragP->fr_fix+=4; + fragP->fr_opcode[1]=0xff; + frag_wane(fragP); + break; + } + + break; + } /* case TAB(BRANCH,SZ_UNDEF) */ + + case TAB(FBRANCH,SZ_UNDEF): { + if(S_GET_SEGMENT(fragP->fr_symbol) == segment || flagseen['l']) { + fragP->fr_subtype = TAB(FBRANCH,SHORT); + fragP->fr_var += 2; + } else { + fragP->fr_subtype = TAB(FBRANCH,LONG); + fragP->fr_var += 4; + } + break; + } /* TAB(FBRANCH,SZ_UNDEF) */ + + case TAB(PCREL,SZ_UNDEF): { + if(S_GET_SEGMENT(fragP->fr_symbol) == segment || flagseen['l']) { + fragP->fr_subtype = TAB(PCREL,SHORT); + fragP->fr_var += 2; + } else { + fragP->fr_subtype = TAB(PCREL,LONG); + fragP->fr_var += 4; + } + break; + } /* TAB(PCREL,SZ_UNDEF) */ + + case TAB(BCC68000,SZ_UNDEF): { + if((fragP->fr_symbol != NULL) + && S_GET_SEGMENT(fragP->fr_symbol) == segment) { + fragP->fr_subtype=TAB(BCC68000,BYTE); + break; + } + /* only Bcc 68000 instructions can come here */ + /* change bcc into b!cc/jmp absl long */ + fragP->fr_opcode[0] ^= 0x01; /* invert bcc */ + if(flagseen['l']) { + fragP->fr_opcode[1] = 0x04; /* branch offset = 6 */ + /* JF: these were fr_opcode[2,3] */ + buffer_address[0] = 0x4e; /* put in jmp long (0x4ef9) */ + buffer_address[1] = 0xf8; + fragP->fr_fix += 2; /* account for jmp instruction */ + subseg_change(SEG_TEXT,0); + fix_new(fragP, fragP->fr_fix, 2, fragP->fr_symbol, 0, + fragP->fr_offset, 0, NO_RELOC); + fragP->fr_fix += 2; + } else { + fragP->fr_opcode[1] = 0x06; /* branch offset = 6 */ + /* JF: these were fr_opcode[2,3] */ + buffer_address[2] = 0x4e; /* put in jmp long (0x4ef9) */ + buffer_address[3] = 0xf9; + fragP->fr_fix += 2; /* account for jmp instruction */ + subseg_change(SEG_TEXT,0); + fix_new(fragP, fragP->fr_fix, 4, fragP->fr_symbol, 0, + fragP->fr_offset, 0, NO_RELOC); + fragP->fr_fix += 4; + } + frag_wane(fragP); + break; + } /* case TAB(BCC68000,SZ_UNDEF) */ + + case TAB(DBCC,SZ_UNDEF): { + if (fragP->fr_symbol != NULL && S_GET_SEGMENT(fragP->fr_symbol) == segment) { + fragP->fr_subtype=TAB(DBCC,SHORT); + fragP->fr_var+=2; + break; + } + /* only DBcc 68000 instructions can come here */ + /* change dbcc into dbcc/jmp absl long */ + /* JF: these used to be fr_opcode[2-4], which is wrong. */ + buffer_address[0] = 0x00; /* branch offset = 4 */ + buffer_address[1] = 0x04; + buffer_address[2] = 0x60; /* put in bra pc + ... */ + + if(flagseen['l']) { + /* JF: these were fr_opcode[5-7] */ + buffer_address[3] = 0x04; /* plus 4 */ + buffer_address[4] = 0x4e;/* Put in Jump Word */ + buffer_address[5] = 0xf8; + fragP->fr_fix += 6; /* account for bra/jmp instruction */ + subseg_change(SEG_TEXT,0); + fix_new(fragP, fragP->fr_fix, 2, fragP->fr_symbol, 0, + fragP->fr_offset, 0, NO_RELOC); + fragP->fr_fix += 2; + } else { + /* JF: these were fr_opcode[5-7] */ + buffer_address[3] = 0x06; /* Plus 6 */ + buffer_address[4] = 0x4e; /* put in jmp long (0x4ef9) */ + buffer_address[5] = 0xf9; + fragP->fr_fix += 6; /* account for bra/jmp instruction */ + subseg_change(SEG_TEXT,0); + fix_new(fragP, fragP->fr_fix, 4, fragP->fr_symbol, 0, + fragP->fr_offset, 0, NO_RELOC); + fragP->fr_fix += 4; + } + + frag_wane(fragP); + break; + } /* case TAB(DBCC,SZ_UNDEF) */ + + case TAB(PCLEA,SZ_UNDEF): { + if ((S_GET_SEGMENT(fragP->fr_symbol))==segment || flagseen['l']) { + fragP->fr_subtype=TAB(PCLEA,SHORT); + fragP->fr_var+=2; + } else { + fragP->fr_subtype=TAB(PCLEA,LONG); + fragP->fr_var+=6; + } + break; + } /* TAB(PCLEA,SZ_UNDEF) */ + + default: + break; + + } /* switch on subtype looking for SZ_UNDEF's. */ + + /* now that SZ_UNDEF are taken care of, check others */ + switch(fragP->fr_subtype) { + case TAB(BCC68000,BYTE): + case TAB(BRANCH,BYTE): + /* We can't do a short jump to the next instruction, + so we force word mode. */ + if (fragP->fr_symbol && S_GET_VALUE(fragP->fr_symbol)==0 && + fragP->fr_symbol->sy_frag==fragP->fr_next) { + fragP->fr_subtype=TAB(TABTYPE(fragP->fr_subtype),SHORT); + fragP->fr_var+=2; + } + break; + default: + break; + } + return fragP->fr_var + fragP->fr_fix - old_fix; +} + +#if defined(OBJ_AOUT) | defined(OBJ_BOUT) +/* the bit-field entries in the relocation_info struct plays hell + with the byte-order problems of cross-assembly. So as a hack, + I added this mach. dependent ri twiddler. Ugly, but it gets + you there. -KWK */ +/* on m68k: first 4 bytes are normal unsigned long, next three bytes +are symbolnum, most sig. byte first. Last byte is broken up with +bit 7 as pcrel, bits 6 & 5 as length, bit 4 as pcrel, and the lower +nibble as nuthin. (on Sun 3 at least) */ +/* Translate the internal relocation information into target-specific + format. */ +#ifdef comment +void +md_ri_to_chars(the_bytes, ri) + char *the_bytes; + struct reloc_info_generic *ri; +{ + /* this is easy */ + md_number_to_chars(the_bytes, ri->r_address, 4); + /* now the fun stuff */ + the_bytes[4] = (ri->r_symbolnum >> 16) & 0x0ff; + the_bytes[5] = (ri->r_symbolnum >> 8) & 0x0ff; + the_bytes[6] = ri->r_symbolnum & 0x0ff; + the_bytes[7] = (((ri->r_pcrel << 7) & 0x80) | ((ri->r_length << 5) & 0x60) | + ((ri->r_extern << 4) & 0x10)); +} +#endif /* comment */ + +void tc_aout_fix_to_chars(where, fixP, segment_address_in_file) +char *where; +fixS *fixP; +relax_addressT segment_address_in_file; +{ + /* + * In: length of relocation (or of address) in chars: 1, 2 or 4. + * Out: GNU LD relocation length code: 0, 1, or 2. + */ + + static unsigned char nbytes_r_length [] = { 42, 0, 1, 42, 2 }; + + long r_extern; + long r_symbolnum; + + /* this is easy */ + md_number_to_chars(where, + fixP->fx_frag->fr_address + fixP->fx_where - segment_address_in_file, + 4); + + /* now the fun stuff */ + if (S_GET_TYPE(fixP->fx_addsy) == N_UNDF) { + r_extern = 1; + r_symbolnum = fixP->fx_addsy->sy_number; + } else { + r_extern = 0; + r_symbolnum = S_GET_TYPE(fixP->fx_addsy); + } + + where[4] = (r_symbolnum >> 16) & 0x0ff; + where[5] = (r_symbolnum >> 8) & 0x0ff; + where[6] = r_symbolnum & 0x0ff; + where[7] = (((fixP->fx_pcrel << 7) & 0x80) | ((nbytes_r_length[fixP->fx_size] << 5) & 0x60) | + ((r_extern << 4) & 0x10)); + + return; +} /* tc_aout_fix_to_chars() */ + +#endif /* OBJ_AOUT or OBJ_BOUT */ + +#ifndef WORKING_DOT_WORD +const int md_short_jump_size = 4; +const int md_long_jump_size = 6; + +void +md_create_short_jump(ptr,from_addr,to_addr,frag,to_symbol) +char *ptr; +long from_addr, + to_addr; +fragS *frag; +symbolS *to_symbol; +{ + long offset; + + offset = to_addr - (from_addr+2); + + md_number_to_chars(ptr ,(long)0x6000,2); + md_number_to_chars(ptr+2,(long)offset,2); +} + +void +md_create_long_jump(ptr,from_addr,to_addr,frag,to_symbol) +char *ptr; +long from_addr, + to_addr; +fragS *frag; +symbolS *to_symbol; +{ + long offset; + + if (cpu_of_arch(current_architecture) < m68020) { + offset=to_addr-S_GET_VALUE(to_symbol); + md_number_to_chars(ptr ,(long)0x4EF9,2); + md_number_to_chars(ptr+2,(long)offset,4); + fix_new(frag,(ptr+2)-frag->fr_literal,4,to_symbol,(symbolS *)0,(long)0,0, + NO_RELOC); + } else { + offset=to_addr - (from_addr+2); + md_number_to_chars(ptr ,(long)0x60ff,2); + md_number_to_chars(ptr+2,(long)offset,4); + } +} + +#endif +/* Different values of OK tell what its OK to return. Things that aren't OK are an error (what a shock, no?) + + 0: Everything is OK + 10: Absolute 1:8 only + 20: Absolute 0:7 only + 30: absolute 0:15 only + 40: Absolute 0:31 only + 50: absolute 0:127 only + 55: absolute -64:63 only + 60: absolute -128:127 only + 70: absolute 0:4095 only + 80: No bignums + +*/ + +static int get_num(exp,ok) +struct m68k_exp *exp; +int ok; +{ +#ifdef TEST2 + long l = 0; + + if(!exp->e_beg) + return 0; + if(*exp->e_beg=='0') { + if(exp->e_beg[1]=='x') + sscanf(exp->e_beg+2,"%x",&l); + else + sscanf(exp->e_beg+1,"%O",&l); + return l; + } + return atol(exp->e_beg); +#else + char *save_in; + char c_save; + + if(!exp) { + /* Can't do anything */ + return 0; + } + if(!exp->e_beg || !exp->e_end) { + seg(exp)=SEG_ABSOLUTE; + adds(exp)=0; + subs(exp)=0; + offs(exp)= (ok==10) ? 1 : 0; + as_warn("Null expression defaults to %ld",offs(exp)); + return 0; + } + + exp->e_siz=0; + if(/* ok!=80 && */exp->e_end[-1]==SIZER && (exp->e_end-exp->e_beg)>=2) { + switch(exp->e_end[0]) { + case 's': + case 'S': + case 'b': + case 'B': + exp->e_siz=1; + break; + case 'w': + case 'W': + exp->e_siz=2; + break; + case 'l': + case 'L': + exp->e_siz=3; + break; + default: + as_bad("Unknown size for expression \"%c\"",exp->e_end[0]); + } + exp->e_end-=2; + } + c_save=exp->e_end[1]; + exp->e_end[1]='\0'; + save_in=input_line_pointer; + input_line_pointer=exp->e_beg; + switch(expression(&(exp->e_exp))) { + case SEG_PASS1: + seg(exp)=SEG_ABSOLUTE; + adds(exp)=0; + subs(exp)=0; + offs(exp)= (ok==10) ? 1 : 0; + as_warn("Unknown expression: '%s' defaulting to %d",exp->e_beg,offs(exp)); + break; + + case SEG_ABSENT: + /* Do the same thing the VAX asm does */ + seg(exp)=SEG_ABSOLUTE; + adds(exp)=0; + subs(exp)=0; + offs(exp)=0; + if(ok==10) { + as_warn("expression out of range: defaulting to 1"); + offs(exp)=1; + } + break; + case SEG_ABSOLUTE: + switch(ok) { + case 10: + if(offs(exp)<1 || offs(exp)>8) { + as_warn("expression out of range: defaulting to 1"); + offs(exp)=1; + } + break; + case 20: + if(offs(exp)<0 || offs(exp)>7) + goto outrange; + break; + case 30: + if(offs(exp)<0 || offs(exp)>15) + goto outrange; + break; + case 40: + if(offs(exp)<0 || offs(exp)>32) + goto outrange; + break; + case 50: + if(offs(exp)<0 || offs(exp)>127) + goto outrange; + break; + case 55: + if(offs(exp)<-64 || offs(exp)>63) + goto outrange; + break; + case 60: + if(offs(exp)<-128 || offs(exp)>127) + goto outrange; + break; + case 70: + if(offs(exp)<0 || offs(exp)>4095) { + outrange: + as_warn("expression out of range: defaulting to 0"); + offs(exp)=0; + } + break; + default: + break; + } + break; + case SEG_TEXT: + case SEG_DATA: + case SEG_BSS: + case SEG_UNKNOWN: + case SEG_DIFFERENCE: + if(ok>=10 && ok<=70) { + seg(exp)=SEG_ABSOLUTE; + adds(exp)=0; + subs(exp)=0; + offs(exp)= (ok==10) ? 1 : 0; + as_warn("Can't deal with expression \"%s\": defaulting to %ld",exp->e_beg,offs(exp)); + } + break; + case SEG_BIG: + if(ok==80 && offs(exp)<0) { /* HACK! Turn it into a long */ + LITTLENUM_TYPE words[6]; + + gen_to_words(words,2,8L);/* These numbers are magic! */ + seg(exp)=SEG_ABSOLUTE; + adds(exp)=0; + subs(exp)=0; + offs(exp)=words[1]|(words[0]<<16); + } else if(ok!=0) { + seg(exp)=SEG_ABSOLUTE; + adds(exp)=0; + subs(exp)=0; + offs(exp)= (ok==10) ? 1 : 0; + as_warn("Can't deal with expression \"%s\": defaulting to %ld",exp->e_beg,offs(exp)); + } + break; + default: + as_fatal("failed sanity check."); + } + if(input_line_pointer!=exp->e_end+1) + as_bad("Ignoring junk after expression"); + exp->e_end[1]=c_save; + input_line_pointer=save_in; + if(exp->e_siz) { + switch(exp->e_siz) { + case 1: + if(!isbyte(offs(exp))) + as_warn("expression doesn't fit in BYTE"); + break; + case 2: + if(!isword(offs(exp))) + as_warn("expression doesn't fit in WORD"); + break; + } + } + return offs(exp); +#endif +} /* get_num() */ + +/* These are the back-ends for the various machine dependent pseudo-ops. */ +void demand_empty_rest_of_line(); /* Hate those extra verbose names */ + +static void s_data1() { + subseg_new(SEG_DATA,1); + demand_empty_rest_of_line(); +} /* s_data1() */ + +static void s_data2() { + subseg_new(SEG_DATA,2); + demand_empty_rest_of_line(); +} /* s_data2() */ + +static void s_bss() { + /* We don't support putting frags in the BSS segment, but we + can put them into initialized data for now... */ + subseg_new(SEG_DATA,255); /* FIXME-SOON */ + demand_empty_rest_of_line(); +} /* s_bss() */ + +static void s_even() { + register int temp; + register long temp_fill; + + temp = 1; /* JF should be 2? */ + temp_fill = get_absolute_expression (); + if ( ! need_pass_2 ) /* Never make frag if expect extra pass. */ + frag_align (temp, (int)temp_fill); + demand_empty_rest_of_line(); +} /* s_even() */ + +static void s_proc() { + demand_empty_rest_of_line(); +} /* s_proc() */ + +/* s_space is defined in read.c .skip is simply an alias to it. */ + +/* + * md_parse_option + * Invocation line includes a switch not recognized by the base assembler. + * See if it's a processor-specific option. These are: + * + * -[A]m[c]68000, -[A]m[c]68008, -[A]m[c]68010, -[A]m[c]68020, -[A]m[c]68030, -[A]m[c]68040 + * -[A]m[c]68881, -[A]m[c]68882, -[A]m[c]68851 + * Select the architecture. Instructions or features not + * supported by the selected architecture cause fatal + * errors. More than one may be specified. The default is + * -m68020 -m68851 -m68881. Note that -m68008 is a synonym + * for -m68000, and -m68882 is a synonym for -m68881. + * + * MAYBE_FLOAT_TOO is defined below so that specifying a processor type + * (e.g. m68020) also requests that float instructions be included. This + * is the default setup, mostly to avoid hassling users. A better + * rearrangement of this structure would be to add an option to DENY + * floating point opcodes, for people who want to really know there's none + * of that funny floaty stuff going on. FIXME-later. + */ +#ifndef MAYBE_FLOAT_TOO +#define MAYBE_FLOAT_TOO m68881 +#endif + +int md_parse_option(argP,cntP,vecP) +char **argP; +int *cntP; +char ***vecP; +{ + switch(**argP) { + case 'l': /* -l means keep external to 2 bit offset + rather than 16 bit one */ + break; + + case 'S': /* -S means that jbsr's always turn into jsr's. */ + break; + + case 'A': + (*argP)++; + /* intentional fall-through */ + case 'm': + (*argP)++; + + if (**argP=='c') { + (*argP)++; + } /* allow an optional "c" */ + + if (!strcmp(*argP, "68000") + || !strcmp(*argP, "68008")) { + current_architecture |= m68000; + } else if (!strcmp(*argP, "68010")) { +#ifdef TE_SUN + omagic= 1<<16|OMAGIC; +#endif + current_architecture |= m68010; + + } else if (!strcmp(*argP, "68020")) { + current_architecture |= m68020 | MAYBE_FLOAT_TOO; + + } else if (!strcmp(*argP, "68030")) { + current_architecture |= m68030 | MAYBE_FLOAT_TOO; + + } else if (!strcmp(*argP, "68040")) { + current_architecture |= m68040 | MAYBE_FLOAT_TOO; + +#ifndef NO_68881 + } else if (!strcmp(*argP, "68881")) { + current_architecture |= m68881; + + } else if (!strcmp(*argP, "68882")) { + current_architecture |= m68882; + +#endif /* NO_68881 */ +#ifndef NO_68851 + } else if (!strcmp(*argP,"68851")) { + current_architecture |= m68851; + +#endif /* NO_68851 */ + } else { + as_warn("Unknown architecture, \"%s\". option ignored", *argP); + } /* switch on architecture */ + + while(**argP) (*argP)++; + + break; + + case 'p': + if (!strcmp(*argP,"pic")) { + (*argP) += 3; + break; /* -pic, Position Independent Code */ + } else { + return(0); + } /* pic or not */ + + default: + return 0; + } + return 1; +} + + +#ifdef TEST2 + +/* TEST2: Test md_assemble() */ +/* Warning, this routine probably doesn't work anymore */ + +main() +{ + struct m68k_it the_ins; + char buf[120]; + char *cp; + int n; + + m68k_ip_begin(); + for(;;) { + if(!gets(buf) || !*buf) + break; + if(buf[0]=='|' || buf[1]=='.') + continue; + for(cp=buf;*cp;cp++) + if(*cp=='\t') + *cp=' '; + if(is_label(buf)) + continue; + bzero(&the_ins,sizeof(the_ins)); + m68k_ip(&the_ins,buf); + if(the_ins.error) { + printf("Error %s in %s\n",the_ins.error,buf); + } else { + printf("Opcode(%d.%s): ",the_ins.numo,the_ins.args); + for(n=0;n<the_ins.numo;n++) + printf(" 0x%x",the_ins.opcode[n]&0xffff); + printf(" "); + print_the_insn(&the_ins.opcode[0],stdout); + (void)putchar('\n'); + } + for(n=0;n<strlen(the_ins.args)/2;n++) { + if(the_ins.operands[n].error) { + printf("op%d Error %s in %s\n",n,the_ins.operands[n].error,buf); + continue; + } + printf("mode %d, reg %d, ",the_ins.operands[n].mode,the_ins.operands[n].reg); + if(the_ins.operands[n].b_const) + printf("Constant: '%.*s', ",1+the_ins.operands[n].e_const-the_ins.operands[n].b_const,the_ins.operands[n].b_const); + printf("ireg %d, isiz %d, imul %d, ",the_ins.operands[n].ireg,the_ins.operands[n].isiz,the_ins.operands[n].imul); + if(the_ins.operands[n].b_iadd) + printf("Iadd: '%.*s',",1+the_ins.operands[n].e_iadd-the_ins.operands[n].b_iadd,the_ins.operands[n].b_iadd); + (void)putchar('\n'); + } + } + m68k_ip_end(); + return 0; +} + +is_label(str) +char *str; +{ + while(ISSPACE(*str)) + str++; + while(*str && !ISSPACE(*str)) + str++; + if(str[-1]==':' || str[1]=='=') + return 1; + return 0; +} + +#endif + +/* Possible states for relaxation: + +0 0 branch offset byte (bra, etc) +0 1 word +0 2 long + +1 0 indexed offsets byte a0@(32,d4:w:1) etc +1 1 word +1 2 long + +2 0 two-offset index word-word a0@(32,d4)@(45) etc +2 1 word-long +2 2 long-word +2 3 long-long + +*/ + + + +#ifdef DONTDEF +abort() +{ + printf("ABORT!\n"); + exit(12); +} + +char *index(s,c) +char *s; +{ + while(*s!=c) { + if(!*s) return 0; + s++; + } + return s; +} + +bzero(s,n) +char *s; +{ + while(n--) + *s++=0; +} + +print_frags() +{ + fragS *fragP; + extern fragS *text_frag_root; + + for(fragP=text_frag_root;fragP;fragP=fragP->fr_next) { + printf("addr %lu next 0x%x fix %ld var %ld symbol 0x%x offset %ld\n", + fragP->fr_address,fragP->fr_next,fragP->fr_fix,fragP->fr_var,fragP->fr_symbol,fragP->fr_offset); + printf("opcode 0x%x type %d subtype %d\n\n",fragP->fr_opcode,fragP->fr_type,fragP->fr_subtype); + } + fflush(stdout); + return 0; +} +#endif + +#ifdef DONTDEF +/*VARARGS1*/ +panic(format,args) +char *format; +{ + fputs("Internal error:",stderr); + _doprnt(format,&args,stderr); + (void)putc('\n',stderr); + as_where(); + abort(); +} +#endif + +/* We have no need to default values of symbols. */ + +/* ARGSUSED */ +symbolS * +md_undefined_symbol (name) + char *name; +{ + return 0; +} + +/* Parse an operand that is machine-specific. + We just return without modifying the expression if we have nothing + to do. */ + +/* ARGSUSED */ +void +md_operand (expressionP) + expressionS *expressionP; +{ +} + +/* Round up a section size to the appropriate boundary. */ +long +md_section_align (segment, size) + segT segment; + long size; +{ + return size; /* Byte alignment is fine */ +} + +/* Exactly what point is a PC-relative offset relative TO? + On the 68k, they're relative to the address of the offset, plus + its size. (??? Is this right? FIXME-SOON!) */ +long +md_pcrel_from (fixP) + fixS *fixP; +{ + return fixP->fx_size + fixP->fx_where + fixP->fx_frag->fr_address; +} + +#ifdef MRI +void s_ds(size) +{ + unsigned int fill = get_absolute_expression() * size; + char *p = frag_var (rs_fill, fill, fill, (relax_substateT)0, (symbolS *)0, + 1, (char *)0); + * p = 0; + demand_empty_rest_of_line(); +} + +void s_dc(size) +{ + + cons(size); + + +} + +void s_dcb(size) +{ + int repeat = get_absolute_expression(); + int fill; + + if (*input_line_pointer == ',') + { + char *p; + input_line_pointer++; + + fill = get_absolute_expression(); + p = frag_var(rs_fill, + size, + size, + (relax_substateT)0, + (symbolS *)0, + repeat, + 0); + md_number_to_chars(p, fill, size); + } + demand_empty_rest_of_line(); + + +} + +void s_chip() +{ + unsigned int target = get_absolute_expression(); +#define MACHINE_MASK (m68000 | m68008 | m68010 | m68020 | m68040) + switch (target) + { + case 68000: + case 68008: + current_architecture = (current_architecture & ~ MACHINE_MASK) | m68000; + break; + case 68010: + current_architecture = (current_architecture & ~ MACHINE_MASK) | m68010; + break; + case 68020: + current_architecture = (current_architecture & ~ MACHINE_MASK) | m68020; + break; + case 68030: + current_architecture = (current_architecture & ~ MACHINE_MASK) | m68030; + break; + case 68040: + current_architecture = (current_architecture & ~ MACHINE_MASK) | m68040; + break; + case 68881: + current_architecture |= m68881; + break; + case 68882: + current_architecture |= m68882; + break; + case 68851: + current_architecture |= m68851; + break; + + default: + as_bad("Unrecognised CHIP %d\n", target); + + } + demand_empty_rest_of_line(); +} + +#endif +/* + * Local Variables: + * comment-column: 0 + * fill-column: 131 + * End: + */ + +/* end of tc-m68k.c */ diff --git a/gas/config/tc-m68kmote.h b/gas/config/tc-m68kmote.h new file mode 100644 index 0000000..f5f4780 --- /dev/null +++ b/gas/config/tc-m68kmote.h @@ -0,0 +1,45 @@ +/* + * This file is tp-generic.h and is intended to be a template for + * target processor specific header files. + */ + +#define TC_M68K 1 + +#ifdef TE_SUN3 +/* This variable contains the value to write out at the beginning of + the a.out file. The 2<<16 means that this is a 68020 file instead + of an old-style 68000 file */ + +#define DEFAULT_MAGIC_NUMBER_FOR_OBJECT_FILE (2<<16|OMAGIC); /* Magic byte for file header */ +#endif /* TE_SUN3 */ + +#define AOUT_MACHTYPE 0x2 +#define REVERSE_SORT_RELOCS /* FIXME-NOW: this line can be removed. */ +#define LOCAL_LABELS_FB + +#define tc_crawl_symbol_chain(a) {;} /* not used */ +#define tc_headers_hook(a) {;} /* not used */ +#define tc_aout_pre_write_hook(x) {;} /* not used */ + +#define LISTING_WORD_SIZE 2 /* A word is 2 bytes */ +#define LISTING_LHS_WIDTH 3 /* 3 word on the first line */ +#define LISTING_LHS_WIDTH_SECOND 3 /* One word on the second line */ +#define LISTING_LHS_CONT_LINES 4 /* And 4 lines max */ +#define LISTING_HEADER "TANDEM ST-2000 68K GAS " + +/* Copied from write.c */ +#define M68K_AIM_KLUDGE(aim, this_state,this_type) \ + if (aim==0 && this_state== 4) { /* hard encoded from tc-m68k.c */ \ + aim=this_type->rlx_forward+1; /* Force relaxation into word mode */ \ + } + +/* + * Local Variables: + * comment-column: 0 + * fill-column: 131 + * End: + */ + +/* end of tc-m68k.h */ + +#define MRI |