diff options
Diffstat (limited to 'gas/config/tc-tahoe.c')
| -rw-r--r-- | gas/config/tc-tahoe.c | 287 |
1 files changed, 141 insertions, 146 deletions
diff --git a/gas/config/tc-tahoe.c b/gas/config/tc-tahoe.c index 58d9639..b5c9abc 100644 --- a/gas/config/tc-tahoe.c +++ b/gas/config/tc-tahoe.c @@ -1,5 +1,5 @@ /* tc-tahoe.c - Not part of GAS yet. */ + Not part of GAS yet. */ #include "as.h" #include "obstack.h" @@ -22,7 +22,7 @@ struct top /* tahoe instruction operand */ int top_ndx; /* -1, or index register. eg 7=[R7] */ int top_reg; /* -1, or register number. eg 7 = R7 or (R7) */ byte top_mode; /* Addressing mode byte. This byte, defines - which of the 11 modes opcode is. */ + which of the 11 modes opcode is. */ char top_access; /* Access type wanted for this opperand 'b'branch ' 'no-instruction 'amrvw' */ @@ -39,7 +39,7 @@ struct top /* tahoe instruction operand */ }; /* The addressing modes for an operand. These numbers are the acutal values - for certain modes, so be carefull if you screw with them. */ + for certain modes, so be carefull if you screw with them. */ #define TAHOE_DIRECT_REG (0x50) #define TAHOE_REG_DEFERRED (0x60) @@ -68,13 +68,13 @@ struct top /* tahoe instruction operand */ #define TAHOE_WIDTH_BIG_NON_REV_JUMP ':' /* The hex code for certain tahoe commands and modes. - This is just for readability. */ + This is just for readability. */ #define TAHOE_JMP (0x71) #define TAHOE_PC_REL_LONG (0xEF) #define TAHOE_BRB (0x11) #define TAHOE_BRW (0x13) /* These, when 'ored' with, or added to, a register number, - set up the number for the displacement mode. */ + set up the number for the displacement mode. */ #define TAHOE_PC_OR_BYTE (0xA0) #define TAHOE_PC_OR_WORD (0xC0) #define TAHOE_PC_OR_LONG (0xE0) @@ -82,8 +82,8 @@ struct top /* tahoe instruction operand */ struct tit /* get it out of the sewer, it stands for tahoe instruction tree (Geeze!) */ { - tahoe_opcodeT tit_opcode; /* The opcode. */ - byte tit_operands; /* How many operands are here. */ + tahoe_opcodeT tit_opcode; /* The opcode. */ + byte tit_operands; /* How many operands are here. */ struct top tit_operand[TIT_MAX_OPERANDS]; /* Operands */ char *tit_error; /* "" or fatal error text */ }; @@ -100,10 +100,10 @@ struct tit /* get it out of the sewer, it stands for long omagic = OMAGIC; /* These chars start a comment anywhere in a source file (except inside - another comment or a quoted string. */ + another comment or a quoted string. */ const char comment_chars[] = "#;"; -/* These chars only start a comment at the beginning of a line. */ +/* These chars only start a comment at the beginning of a line. */ const char line_comment_chars[] = "#"; /* Chars that can be used to separate mant from exp in floating point nums */ @@ -113,7 +113,7 @@ const char EXP_CHARS[] = "eE"; as in 0f123.456 or 0d1.234E-12 (see exp chars above) Note: The Tahoe port doesn't support floating point constants. This is - consistant with 'as' If it's needed, I can always add it later. */ + consistant with 'as' If it's needed, I can always add it later. */ const char FLT_CHARS[] = "df"; /* Also be aware that MAXIMUM_NUMBER_OF_CHARS_FOR_FLOAT may have to be @@ -122,11 +122,11 @@ const char FLT_CHARS[] = "df"; (The tahoe has plenty of room, so the change currently isn't needed.) */ -static struct tit t; /* A tahoe instruction after decoding. */ +static struct tit t; /* A tahoe instruction after decoding. */ void float_cons (); /* A table of pseudo ops (sans .), the function called, and an integer op - that the function is called with. */ + that the function is called with. */ const pseudo_typeS md_pseudo_table[] = { @@ -164,7 +164,6 @@ States for Tahoe address relaxing. Always, 1 byte opcode, then displacement/absolute. If word or longword, change opcode to brw or jmp. - 2. TAHOE_WIDTH_CONDITIONAL_JUMP (?) J<cond> where <cond> is a simple flag test. Format: "b?" @@ -220,7 +219,7 @@ pc_rel_disp? That sort of thing.) */ to them. (WF + length(word)) The first letter is Byte, Word. - 2nd letter is Forward, Backward. */ + 2nd letter is Forward, Backward. */ #define BF (1+ 127) #define BB (1+-128) #define WF (2+ 32767) @@ -228,7 +227,7 @@ pc_rel_disp? That sort of thing.) */ /* Dont need LF, LB because they always reach. [They are coded as 0.] */ #define C(a,b) ENCODE_RELAX(a,b) -/* This macro has no side-effects. */ +/* This macro has no side-effects. */ #define ENCODE_RELAX(what,length) (((what) << 2) + (length)) #define RELAX_STATE(what) ((what) >> 2) #define RELAX_LENGTH(length) ((length) && 3) @@ -246,7 +245,7 @@ pc_rel_disp? That sort of thing.) */ /* This is the table used by gas to figure out relaxing modes. The fields are forward_branch reach, backward_branch reach, number of bytes it would take, - where the next biggest branch is. */ + where the next biggest branch is. */ const relax_typeS md_relax_table[] = { { @@ -277,7 +276,7 @@ const relax_typeS md_relax_table[] = }, /* unused 1,3 */ /* Reversible Conditional Branch. If the branch won't reach, reverse it, and jump over a brw or a jmp that will reach. The relax part is the - actual address. */ + actual address. */ { BF, BB, 1, C (2, 1) }, /* b<cond> B`foo 2,0 */ @@ -291,7 +290,7 @@ const relax_typeS md_relax_table[] = 1, 1, 0, 0 }, /* unused 2,3 */ /* Another type of reversable branch. But this only has a word - displacement. */ + displacement. */ { 1, 1, 0, 0 }, /* unused 3,0 */ @@ -308,7 +307,7 @@ const relax_typeS md_relax_table[] = displacement. If I can't reach, branch over a byte branch, to a jump that will reach. The jumped branch jumps over the reaching branch, to continue with the flow of the program. It's like playing - leap frog. */ + leap frog. */ { 1, 1, 0, 0 }, /* unused 4,0 */ @@ -323,7 +322,7 @@ const relax_typeS md_relax_table[] = }, /* unused 4,3 */ /* Normal displacement mode, no jumping or anything like that. The relax points to one byte before the address, thats why all - the numbers are up by one. */ + the numbers are up by one. */ { BF + 1, BB + 1, 2, C (5, 1) }, /* B^"foo" 5,0 */ @@ -349,13 +348,13 @@ const relax_typeS md_relax_table[] = md_begin() will crash. */ static struct hash_control *op_hash; -/* Init function. Build the hash table. */ +/* Init function. Build the hash table. */ void md_begin () { struct tot *tP; char *errorval = 0; - int synthetic_too = 1; /* If 0, just use real opcodes. */ + int synthetic_too = 1; /* If 0, just use real opcodes. */ op_hash = hash_new (); @@ -431,22 +430,22 @@ Tahoe options:\n\ /* The functions in this section take numbers in the machine format, and munges them into Tahoe byte order. - They exist primarily for cross assembly purpose. */ -void /* Knows about order of bytes in address. */ + They exist primarily for cross assembly purpose. */ +void /* Knows about order of bytes in address. */ md_number_to_chars (con, value, nbytes) - char con[]; /* Return 'nbytes' of chars here. */ - valueT value; /* The value of the bits. */ - int nbytes; /* Number of bytes in the output. */ + char con[]; /* Return 'nbytes' of chars here. */ + valueT value; /* The value of the bits. */ + int nbytes; /* Number of bytes in the output. */ { number_to_chars_bigendian (con, value, nbytes); } #ifdef comment -void /* Knows about order of bytes in address. */ +void /* Knows about order of bytes in address. */ md_number_to_imm (con, value, nbytes) - char con[]; /* Return 'nbytes' of chars here. */ - long int value; /* The value of the bits. */ - int nbytes; /* Number of bytes in the output. */ + char con[]; /* Return 'nbytes' of chars here. */ + long int value; /* The value of the bits. */ + int nbytes; /* Number of bytes in the output. */ { md_number_to_chars (con, value, nbytes); } @@ -462,20 +461,20 @@ tc_apply_fix (fixP, val) know (0); } -void /* Knows about order of bytes in address. */ +void /* Knows about order of bytes in address. */ md_number_to_disp (con, value, nbytes) - char con[]; /* Return 'nbytes' of chars here. */ - long int value; /* The value of the bits. */ - int nbytes; /* Number of bytes in the output. */ + char con[]; /* Return 'nbytes' of chars here. */ + long int value; /* The value of the bits. */ + int nbytes; /* Number of bytes in the output. */ { md_number_to_chars (con, value, nbytes); } -void /* Knows about order of bytes in address. */ +void /* Knows about order of bytes in address. */ md_number_to_field (con, value, nbytes) - char con[]; /* Return 'nbytes' of chars here. */ - long int value; /* The value of the bits. */ - int nbytes; /* Number of bytes in the output. */ + char con[]; /* Return 'nbytes' of chars here. */ + long int value; /* The value of the bits. */ + int nbytes; /* Number of bytes in the output. */ { md_number_to_chars (con, value, nbytes); } @@ -486,7 +485,7 @@ md_number_to_field (con, value, nbytes) next three bytes are symbolnum, in kind of 3 byte big endian (least sig. byte last). The last byte is broken up with bit 7 as pcrel, bits 6 & 5 as length, - bit 4 as extern and the last nibble as 'undefined'. */ + bit 4 as extern and the last nibble as 'undefined'. */ #if comment void @@ -495,7 +494,7 @@ md_ri_to_chars (ri_p, ri) { byte the_bytes[sizeof (struct relocation_info)]; /* The reason I can't just encode these directly into ri_p is that - ri_p may point to ri. */ + ri_p may point to ri. */ /* This is easy */ md_number_to_chars (the_bytes, ri.r_address, sizeof (ri.r_address)); @@ -518,9 +517,9 @@ md_ri_to_chars (ri_p, ri) next three bytes are symbolnum, in kind of 3 byte big endian (least sig. byte last). The last byte is broken up with bit 7 as pcrel, bits 6 & 5 as length, - bit 4 as extern and the last nibble as 'undefined'. */ + bit 4 as extern and the last nibble as 'undefined'. */ -void +void tc_aout_fix_to_chars (where, fixP, segment_address_in_file) char *where; fixS *fixP; @@ -554,7 +553,7 @@ tc_aout_fix_to_chars (where, fixP, segment_address_in_file) /* Relocate byte stuff */ -/* This is for broken word. */ +/* This is for broken word. */ const int md_short_jump_size = 3; void @@ -606,7 +605,7 @@ md_create_long_jump (ptr, from_addr, to_addr, frag, to_symbol) int md_estimate_size_before_relax (fragP, segment_type) register fragS *fragP; - segT segment_type; /* N_DATA or N_TEXT. */ + segT segment_type; /* N_DATA or N_TEXT. */ { register char *p; register int old_fr_fix; @@ -619,16 +618,16 @@ md_estimate_size_before_relax (fragP, segment_type) if (S_GET_SEGMENT (fragP->fr_symbol) == segment_type) { /* The symbol was in the same segment as the opcode, and it's - a real pc_rel case so it's a relaxable case. */ + a real pc_rel case so it's a relaxable case. */ fragP->fr_subtype = ENCODE_RELAX (STATE_PC_RELATIVE, STATE_BYTE); } else { /* This case is still undefined, so asume it's a long word for the - linker to fix. */ + linker to fix. */ p = fragP->fr_literal + old_fr_fix; *p |= TAHOE_PC_OR_LONG; - /* We now know how big it will be, one long word. */ + /* We now know how big it will be, one long word. */ fragP->fr_fix += 1 + 4; fix_new (fragP, old_fr_fix + 1, fragP->fr_symbol, fragP->fr_offset, FX_PCREL32, NULL); @@ -644,7 +643,7 @@ md_estimate_size_before_relax (fragP, segment_type) else { p = fragP->fr_literal + old_fr_fix; - *fragP->fr_opcode ^= 0x10; /* Reverse sense of branch. */ + *fragP->fr_opcode ^= 0x10; /* Reverse sense of branch. */ *p++ = 6; *p++ = TAHOE_JMP; *p++ = TAHOE_PC_REL_LONG; @@ -664,7 +663,7 @@ md_estimate_size_before_relax (fragP, segment_type) else { p = fragP->fr_literal + old_fr_fix; - *fragP->fr_opcode ^= 0x10; /* Reverse sense of branch. */ + *fragP->fr_opcode ^= 0x10; /* Reverse sense of branch. */ *p++ = 0; *p++ = 6; *p++ = TAHOE_JMP; @@ -737,11 +736,11 @@ md_convert_frag (headers, seg, fragP) segT seg; register fragS *fragP; { - register char *addressP; /* -> _var to change. */ - register char *opcodeP; /* -> opcode char(s) to change. */ + register char *addressP; /* -> _var to change. */ + register char *opcodeP; /* -> opcode char(s) to change. */ register short int length_code; /* 2=long 1=word 0=byte */ register short int extension = 0; /* Size of relaxed address. - Added to fr_fix: incl. ALL var chars. */ + Added to fr_fix: incl. ALL var chars. */ register symbolS *symbolP; register long int where; register long int address_of_var; @@ -764,21 +763,21 @@ md_convert_frag (headers, seg, fragP) case ENCODE_RELAX (STATE_PC_RELATIVE, STATE_BYTE): /* *addressP holds the registers number, plus 0x10, if it's deferred mode. To set up the right mode, just OR the size of this displacement */ - /* Byte displacement. */ + /* Byte displacement. */ *addressP++ |= TAHOE_PC_OR_BYTE; *addressP = target_address - (address_of_var + 2); extension = 2; break; case ENCODE_RELAX (STATE_PC_RELATIVE, STATE_WORD): - /* Word displacement. */ + /* Word displacement. */ *addressP++ |= TAHOE_PC_OR_WORD; md_number_to_chars (addressP, target_address - (address_of_var + 3), 2); extension = 3; break; case ENCODE_RELAX (STATE_PC_RELATIVE, STATE_LONG): - /* Long word displacement. */ + /* Long word displacement. */ *addressP++ |= TAHOE_PC_OR_LONG; md_number_to_chars (addressP, target_address - (address_of_var + 5), 4); extension = 5; @@ -790,7 +789,7 @@ md_convert_frag (headers, seg, fragP) break; case ENCODE_RELAX (STATE_CONDITIONAL_BRANCH, STATE_WORD): - *opcodeP ^= 0x10; /* Reverse sense of test. */ + *opcodeP ^= 0x10; /* Reverse sense of test. */ *addressP++ = 3; /* Jump over word branch */ *addressP++ = TAHOE_BRW; md_number_to_chars (addressP, target_address - (address_of_var + 4), 2); @@ -798,7 +797,7 @@ md_convert_frag (headers, seg, fragP) break; case ENCODE_RELAX (STATE_CONDITIONAL_BRANCH, STATE_LONG): - *opcodeP ^= 0x10; /* Reverse sense of test. */ + *opcodeP ^= 0x10; /* Reverse sense of test. */ *addressP++ = 6; *addressP++ = TAHOE_JMP; *addressP++ = TAHOE_PC_REL_LONG; @@ -863,7 +862,7 @@ md_convert_frag (headers, seg, fragP) } /* md_convert_frag */ -/* This is the stuff for md_assemble. */ +/* This is the stuff for md_assemble. */ #define FP_REG 13 #define SP_REG 14 #define PC_REG 15 @@ -885,7 +884,7 @@ md_convert_frag (headers, seg, fragP) */ int tahoe_reg_parse (start) - char **start; /* A pointer to the string to parse. */ + char **start; /* A pointer to the string to parse. */ { register char *regpoint = *start; register int regnum = -1; @@ -893,16 +892,16 @@ tahoe_reg_parse (start) switch (*regpoint++) { case '%': /* Registers can start with a %, - R or r, and then a number. */ + R or r, and then a number. */ case 'R': case 'r': if (isdigit (*regpoint)) { - /* Got the first digit. */ + /* Got the first digit. */ regnum = *regpoint++ - '0'; if ((regnum == 1) && isdigit (*regpoint)) { - /* Its a two digit number. */ + /* Its a two digit number. */ regnum = 10 + (*regpoint++ - '0'); if (regnum > BIGGESTREG) { /* Number too big? */ @@ -1011,15 +1010,15 @@ tip_op (optex, topP) out: ndx, reg, mode, error, dispsize */ { - int mode = 0; /* This operand's mode. */ - char segfault = *optex; /* To keep the back parsing from freaking. */ - char *point = optex + 1; /* Parsing from front to back. */ - char *end; /* Parsing from back to front. */ + int mode = 0; /* This operand's mode. */ + char segfault = *optex; /* To keep the back parsing from freaking. */ + char *point = optex + 1; /* Parsing from front to back. */ + char *end; /* Parsing from back to front. */ int reg = -1; /* major register, -1 means absent */ int imreg = -1; /* Major register in immediate mode */ int ndx = -1; /* index register number, -1 means absent */ char dec_inc = ' '; /* Is the SP auto-incremented '+' or - auto-decremented '-' or neither ' '. */ + auto-decremented '-' or neither ' '. */ int immediate = 0; /* 1 if '$' immediate mode */ int call_width = 0; /* If the caller casts the displacement */ int abs_width = 0; /* The width of the absolute displacment */ @@ -1030,14 +1029,14 @@ tip_op (optex, topP) char *tp, *temp, c; /* Temporary holders */ - char access = topP->top_access; /* Save on a deref. */ + char access = topP->top_access; /* Save on a deref. */ char width = topP->top_width; int really_none = 0; /* Empty expressions evaluate to 0 but I need to know if it's there or not */ expressionS *expP; /* -> expression values for this operand */ - /* Does this command restrict the displacement size. */ + /* Does this command restrict the displacement size. */ if (access == 'b') com_width = (width == 'b' ? 1 : (width == 'w' ? 2 : @@ -1095,7 +1094,7 @@ tip_op (optex, topP) * yank. */ - for (end = point; *end != '\0'; end++) /* Move to the end. */ + for (end = point; *end != '\0'; end++) /* Move to the end. */ ; if (end != point) /* Null string? */ @@ -1104,38 +1103,38 @@ tip_op (optex, topP) if (end > point && *end == ' ' && end[-1] != '\'') end--; /* Hop white space */ - /* Is this an index reg. */ + /* Is this an index reg. */ if ((*end == ']') && (end[-1] != '\'')) { temp = end; - /* Find opening brace. */ + /* Find opening brace. */ for (--end; (*end != '[' && end != point); end--) ; - /* If I found the opening brace, get the index register number. */ + /* If I found the opening brace, get the index register number. */ if (*end == '[') { - tp = end + 1; /* tp should point to the start of a reg. */ + tp = end + 1; /* tp should point to the start of a reg. */ ndx = tahoe_reg_parse (&tp); if (tp != temp) - { /* Reg. parse error. */ + { /* Reg. parse error. */ ndx = -1; } else { - end--; /* Found it, move past brace. */ + end--; /* Found it, move past brace. */ } if (ndx == -1) { op_bad = _("Couldn't parse the [index] in this operand."); - end = point; /* Force all the rest of the tests to fail. */ + end = point; /* Force all the rest of the tests to fail. */ } } else { op_bad = _("Couldn't find the opening '[' for the index of this operand."); - end = point; /* Force all the rest of the tests to fail. */ + end = point; /* Force all the rest of the tests to fail. */ } } @@ -1152,30 +1151,30 @@ tip_op (optex, topP) { temp = end; - /* Find opening paren. */ + /* Find opening paren. */ for (--end; (*end != '(' && end != point); end--) ; - /* If I found the opening paren, get the register number. */ + /* If I found the opening paren, get the register number. */ if (*end == '(') { tp = end + 1; reg = tahoe_reg_parse (&tp); if (tp != temp) { - /* Not a register, but could be part of the expression. */ + /* Not a register, but could be part of the expression. */ reg = -1; end = temp; /* Rest the pointer back */ } else { - end--; /* Found the reg. move before opening paren. */ + end--; /* Found the reg. move before opening paren. */ } } else { op_bad = _("Couldn't find the opening '(' for the deref of this operand."); - end = point; /* Force all the rest of the tests to fail. */ + end = point; /* Force all the rest of the tests to fail. */ } } @@ -1208,7 +1207,7 @@ tip_op (optex, topP) if it is there.*/ if (*point != '\0') { - /* If there is junk after point, then the it's not immediate reg. */ + /* If there is junk after point, then the it's not immediate reg. */ point = tp; imreg = -1; } @@ -1238,9 +1237,9 @@ tip_op (optex, topP) really_none = 1; case O_constant: /* for SEG_ABSOLUTE, we shouldnt need to set X_op_symbol, - X_add_symbol to any particular value. */ + X_add_symbol to any particular value. */ /* But, we will program defensively. Since this situation occurs - rarely so it costs us little to do so. */ + rarely so it costs us little to do so. */ expP->X_add_symbol = NULL; expP->X_op_symbol = NULL; /* How many bytes are needed to express this abs value? */ @@ -1270,7 +1269,7 @@ tip_op (optex, topP) case O_big: /* This is an error. Tahoe doesn't allow any expressions bigger that a 32 bit long word. Any bigger has to be referenced - by address. */ + by address. */ op_bad = _("Expression is too large for a 32 bits."); break; } @@ -1285,7 +1284,6 @@ tip_op (optex, topP) /* I'm done, so restore optex */ *optex = segfault; - /* * At this point in the game, we (in theory) have all the components of * the operand at least parsed. Now it's time to check for syntax/semantic @@ -1437,7 +1435,7 @@ tip_op (optex, topP) op_bad = _("You can't index a register in immediate mode."); if (access == 'a') op_bad = _("Immediate access can't be used as an address."); - /* ponder the wisdom of a cast because it doesn't do any good. */ + /* ponder the wisdom of a cast because it doesn't do any good. */ } else if (deferred) { @@ -1454,7 +1452,7 @@ tip_op (optex, topP) /* * At this point, all the errors we can do have be checked for. - * We can build the 'top'. */ + * We can build the 'top'. */ topP->top_ndx = ndx; topP->top_reg = reg; @@ -1480,26 +1478,26 @@ tip_op (optex, topP) static void tip (titP, instring) - struct tit *titP; /* We build an exploded instruction here. */ - char *instring; /* Text of a vax instruction: we modify. */ + struct tit *titP; /* We build an exploded instruction here. */ + char *instring; /* Text of a vax instruction: we modify. */ { - register struct tot_wot *twP = NULL; /* How to bit-encode this opcode. */ + register struct tot_wot *twP = NULL; /* How to bit-encode this opcode. */ register char *p; /* 1/skip whitespace.2/scan vot_how */ register char *q; /* */ register unsigned char count; /* counts number of operands seen */ register struct top *operandp;/* scan operands in struct tit */ register char *alloperr = ""; /* error over all operands */ register char c; /* Remember char, (we clobber it - with '\0' temporarily). */ + with '\0' temporarily). */ char *save_input_line_pointer; if (*instring == ' ') - ++instring; /* Skip leading whitespace. */ + ++instring; /* Skip leading whitespace. */ for (p = instring; *p && *p != ' '; p++) ; /* MUST end in end-of-string or - exactly 1 space. */ - /* Scanned up to end of operation-code. */ - /* Operation-code is ended with whitespace. */ + exactly 1 space. */ + /* Scanned up to end of operation-code. */ + /* Operation-code is ended with whitespace. */ if (p == instring) { titP->tit_error = _("No operator"); @@ -1516,7 +1514,7 @@ tip (titP, instring) * We trust instring points to an op-name, with no whitespace. */ twP = (struct tot_wot *) hash_find (op_hash, instring); - *p = c; /* Restore char after op-code. */ + *p = c; /* Restore char after op-code. */ if (twP == 0) { titP->tit_error = _("Unknown operator"); @@ -1565,7 +1563,7 @@ tip (titP, instring) operandp->top_access = p[0]; operandp->top_width = p[1]; tip_op (instring - 1, operandp); - *q = c; /* Restore input text. */ + *q = c; /* Restore input text. */ if (*(operandp->top_error)) { alloperr = operandp->top_error; @@ -1576,13 +1574,13 @@ tip (titP, instring) else alloperr = _("Not enough operands"); } - /* Restore the pointer. */ + /* Restore the pointer. */ input_line_pointer = save_input_line_pointer; if (!*alloperr) { if (*instring == ' ') - instring++; /* Skip whitespace. */ + instring++; /* Skip whitespace. */ if (*instring) alloperr = _("Too many operands"); } @@ -1590,40 +1588,40 @@ tip (titP, instring) } } - titP->tit_opcode = twP->code; /* The op-code. */ + titP->tit_opcode = twP->code; /* The op-code. */ titP->tit_operands = count; } /* tip */ /* md_assemble() emit frags for 1 instruction */ void md_assemble (instruction_string) - char *instruction_string; /* A string: assemble 1 instruction. */ + char *instruction_string; /* A string: assemble 1 instruction. */ { char *p; - register struct top *operandP;/* An operand. Scans all operands. */ - /* char c_save; fixme: remove this line *//* What used to live after an expression. */ - /* struct frag *fragP; fixme: remove this line *//* Fragment of code we just made. */ + register struct top *operandP;/* An operand. Scans all operands. */ + /* char c_save; fixme: remove this line *//* What used to live after an expression. */ + /* struct frag *fragP; fixme: remove this line *//* Fragment of code we just made. */ /* register struct top *end_operandP; fixme: remove this line *//* -> slot just after last operand - Limit of the for (each operand). */ + Limit of the for (each operand). */ register expressionS *expP; /* -> expression values for this operand */ - /* These refer to an instruction operand expression. */ + /* These refer to an instruction operand expression. */ segT to_seg; /* Target segment of the address. */ register valueT this_add_number; - register symbolS *this_add_symbol; /* +ve (minuend) symbol. */ + register symbolS *this_add_symbol; /* +ve (minuend) symbol. */ - /* tahoe_opcodeT opcode_as_number; fixme: remove this line *//* The opcode as a number. */ - char *opcodeP; /* Where it is in a frag. */ - /* char *opmodeP; fixme: remove this line *//* Where opcode type is, in a frag. */ + /* tahoe_opcodeT opcode_as_number; fixme: remove this line *//* The opcode as a number. */ + char *opcodeP; /* Where it is in a frag. */ + /* char *opmodeP; fixme: remove this line *//* Where opcode type is, in a frag. */ int dispsize; /* From top_dispsize: tahoe_operand_width (in bytes) */ int is_undefined; /* 1 if operand expression's - segment not known yet. */ + segment not known yet. */ int pc_rel; /* Is this operand pc relative? */ - /* Decode the operand. */ + /* Decode the operand. */ tip (&t, instruction_string); /* @@ -1640,11 +1638,11 @@ md_assemble (instruction_string) else { /* We saw no errors in any operands - try to make frag(s) */ - /* Emit op-code. */ - /* Remember where it is, in case we want to modify the op-code later. */ + /* Emit op-code. */ + /* Remember where it is, in case we want to modify the op-code later. */ opcodeP = frag_more (1); *opcodeP = t.tit_opcode; - /* Now do each operand. */ + /* Now do each operand. */ for (operandP = t.tit_operand; operandP < t.tit_operand + t.tit_operands; operandP++) @@ -1657,7 +1655,7 @@ md_assemble (instruction_string) FRAG_APPEND_1_CHAR (0x40 + operandP->top_ndx); } /* if(top_ndx>=0) */ - /* Here to make main operand frag(s). */ + /* Here to make main operand frag(s). */ this_add_number = expP->X_add_number; this_add_symbol = expP->X_add_symbol; to_seg = operandP->seg_of_operand; @@ -1675,14 +1673,14 @@ md_assemble (instruction_string) if (operandP->top_access == 'b') { /* Branches must be expressions. A psuedo branch can also jump to - an absolute address. */ + an absolute address. */ if (to_seg == now_seg || is_undefined) { - /* If is_undefined, then it might BECOME now_seg by relax time. */ + /* If is_undefined, then it might BECOME now_seg by relax time. */ if (dispsize) { /* I know how big the branch is supposed to be (it's a normal - branch), so I set up the frag, and let GAS do the rest. */ + branch), so I set up the frag, and let GAS do the rest. */ p = frag_more (dispsize); fix_new (frag_now, p - frag_now->fr_literal, this_add_symbol, this_add_number, @@ -1693,7 +1691,7 @@ md_assemble (instruction_string) { /* (to_seg==now_seg || to_seg == SEG_UNKNOWN) && dispsize==0 */ /* If we don't know how big it is, then its a synthetic branch, - so we set up a simple relax state. */ + so we set up a simple relax state. */ switch (operandP->top_width) { case TAHOE_WIDTH_CONDITIONAL_JUMP: @@ -1708,13 +1706,13 @@ md_assemble (instruction_string) break; case TAHOE_WIDTH_ALWAYS_JUMP: /* Simple (unconditional) jump. I may have to convert this to - a word branch, or an absolute jump. */ + a word branch, or an absolute jump. */ frag_var (rs_machine_dependent, 5, 1, ENCODE_RELAX (STATE_ALWAYS_BRANCH, is_undefined ? STATE_UNDF : STATE_BYTE), this_add_symbol, this_add_number, opcodeP); break; - /* The smallest size for the next 2 cases is word. */ + /* The smallest size for the next 2 cases is word. */ case TAHOE_WIDTH_BIG_REV_JUMP: frag_var (rs_machine_dependent, 8, 2, ENCODE_RELAX (STATE_BIG_REV_BRANCH, @@ -1739,19 +1737,19 @@ md_assemble (instruction_string) { /* to_seg != now_seg && to_seg != seg_unknown (still in branch) In other words, I'm jumping out of my segment so extend the - branches to jumps, and let GAS fix them. */ + branches to jumps, and let GAS fix them. */ /* These are "branches" what will always be branches around a jump to the correct addresss in real life. If to_seg is SEG_ABSOLUTE, just encode the branch in, - else let GAS fix the address. */ + else let GAS fix the address. */ switch (operandP->top_width) { /* The theory: For SEG_ABSOLUTE, then mode is ABSOLUTE_ADDR, jump to that addresss (not pc_rel). - For other segs, address is a long word PC rel jump. */ + For other segs, address is a long word PC rel jump. */ case TAHOE_WIDTH_CONDITIONAL_JUMP: /* b<cond> */ /* To reverse the condition in a TAHOE branch, @@ -1835,11 +1833,11 @@ md_assemble (instruction_string) } else { - /* It ain't a branch operand. */ + /* It ain't a branch operand. */ switch (operandP->top_mode) { /* Auto-foo access, only works for one reg (SP) - so the only thing needed is the mode. */ + so the only thing needed is the mode. */ case TAHOE_AUTO_DEC: case TAHOE_AUTO_INC: case TAHOE_AUTO_INC_DEFERRED: @@ -1854,7 +1852,7 @@ md_assemble (instruction_string) break; /* An absolute address. It's size is always 5 bytes. - (mode_type + 4 byte address). */ + (mode_type + 4 byte address). */ case TAHOE_ABSOLUTE_ADDR: know ((this_add_symbol == NULL)); p = frag_more (5); @@ -1863,7 +1861,7 @@ md_assemble (instruction_string) break; /* Immediate data. If the size isn't known, then it's an address - + and offset, which is 4 bytes big. */ + + and offset, which is 4 bytes big. */ case TAHOE_IMMEDIATE: if (this_add_symbol != NULL) { @@ -1875,7 +1873,7 @@ md_assemble (instruction_string) } else { - /* It's a integer, and I know it's size. */ + /* It's a integer, and I know it's size. */ if ((unsigned) this_add_number < 0x40) { /* Will it fit in a literal? */ @@ -1906,7 +1904,7 @@ md_assemble (instruction_string) /* Distance from the PC. If the size isn't known, we have to relax into it. The difference between this and disp(sp) is that this offset is pc_rel, and disp(sp) isn't. - Note the drop through code. */ + Note the drop through code. */ case TAHOE_DISPLACED_RELATIVE: case TAHOE_DISP_REL_DEFERRED: @@ -1915,20 +1913,20 @@ md_assemble (instruction_string) /* Register, plus a displacement mode. Save the register number, and weather its deffered or not, and relax the size if it isn't - known. */ + known. */ case TAHOE_REG_DISP: case TAHOE_REG_DISP_DEFERRED: if (operandP->top_mode == TAHOE_DISP_REL_DEFERRED || operandP->top_mode == TAHOE_REG_DISP_DEFERRED) operandP->top_reg += 0x10; /* deffered mode is always 0x10 higher - than it's non-deffered sibling. */ + than it's non-deffered sibling. */ /* Is this a value out of this segment? The first part of this conditional is a cludge to make gas produce the same output as 'as' when there is a lable, in the current segment, displaceing a register. It's strange, and no one in their right mind would do it, but it's easy - to cludge. */ + to cludge. */ if ((dispsize == 0 && !pc_rel) || (to_seg != now_seg && !is_undefined && to_seg != SEG_ABSOLUTE)) dispsize = 4; @@ -1948,7 +1946,7 @@ md_assemble (instruction_string) } else { - /* Either this is an abs, or a cast. */ + /* Either this is an abs, or a cast. */ p = frag_more (dispsize + 1); switch (dispsize) { @@ -1975,8 +1973,7 @@ md_assemble (instruction_string) } /* if(!need_pass_2 && !goofed) */ } /* tahoe_assemble() */ - -/* We have no need to default values of symbols. */ +/* We have no need to default values of symbols. */ /* ARGSUSED */ symbolS * @@ -1986,7 +1983,7 @@ md_undefined_symbol (name) return 0; } /* md_undefined_symbol() */ -/* Round up a section size to the appropriate boundary. */ +/* Round up a section size to the appropriate boundary. */ valueT md_section_align (segment, size) segT segment; @@ -1999,7 +1996,7 @@ md_section_align (segment, size) On the sparc, they're relative to the address of the offset, plus its size. This gets us to the following instruction. (??? Is this right? FIXME-SOON) */ -long +long md_pcrel_from (fixP) fixS *fixP; { @@ -2015,7 +2012,7 @@ md_pcrel_from (fixP) : 0))) + fixP->fx_where + fixP->fx_frag->fr_address); } /* md_pcrel_from() */ -int +int tc_is_pcrel (fixP) fixS *fixP; { @@ -2023,5 +2020,3 @@ tc_is_pcrel (fixP) know (0); return (0); } /* tc_is_pcrel() */ - -/* end of tc-tahoe.c */ |