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- /* A lexical scanner generated by flex */
-
- /* scanner skeleton version:
- * $Header: /usr/fsys/odin/a/vern/flex/RCS/flex.skel,v 2.16 90/08/03 14:09:36 vern Exp $
- */
-
- #define FLEX_SCANNER
-
- #include <stdio.h>
- #ifdef WIN32
- #include <io.h>
- #endif
-
- /* cfront 1.2 defines "c_plusplus" instead of "__cplusplus" */
- #ifdef c_plusplus
- #ifndef __cplusplus
- #define __cplusplus
- #endif
- #endif
-
-
- #ifdef __cplusplus
-
- #include <stdlib.h>
- #include <osfcn.h>
-
- /* use prototypes in function declarations */
- #define YY_USE_PROTOS
-
- /* the "const" storage-class-modifier is valid */
- #define YY_USE_CONST
-
- #else /* ! __cplusplus */
-
- #ifdef __STDC__
-
- #ifdef __GNUC__
- #include <stddef.h>
- void *malloc( size_t );
- void free( void* );
- #else
- #include <stdlib.h>
- #endif /* __GNUC__ */
-
- #define YY_USE_PROTOS
- #define YY_USE_CONST
-
- #endif /* __STDC__ */
- #endif /* ! __cplusplus */
-
-
- #ifdef __TURBOC__
- #define YY_USE_CONST
- #endif
-
-
- #ifndef YY_USE_CONST
- #define const
- #endif
-
-
- #ifdef YY_USE_PROTOS
- #define YY_PROTO(proto) proto
- #else
- #define YY_PROTO(proto) ()
- #endif
-
-
- /* amount of stuff to slurp up with each read */
- #ifndef YY_READ_BUF_SIZE
- #define YY_READ_BUF_SIZE 8192
- #endif
-
- /* returned upon end-of-file */
- #define YY_END_TOK 0
-
- /* copy whatever the last rule matched to the standard output */
-
- /* cast to (char *) is because for 8-bit chars, yytext is (unsigned char *) */
- /* this used to be an fputs(), but since the string might contain NUL's,
- * we now use fwrite()
- */
- #define ECHO (void) fwrite( (char *) yytext, yyleng, 1, yyout )
-
- /* gets input and stuffs it into "buf". number of characters read, or YY_NULL,
- * is returned in "result".
- */
- #define YY_INPUT(buf,result,max_size) \
- if ( (result = read( fileno(yyin), (char *) buf, max_size )) < 0 ) \
- YY_FATAL_ERROR( "read() in flex scanner failed" );
- #define YY_NULL 0
-
- /* no semi-colon after return; correct usage is to write "yyterminate();" -
- * we don't want an extra ';' after the "return" because that will cause
- * some compilers to complain about unreachable statements.
- */
- #define yyterminate() return ( YY_NULL )
-
- /* report a fatal error */
-
- /* The funky do-while is used to turn this macro definition into
- * a single C statement (which needs a semi-colon terminator).
- * This avoids problems with code like:
- *
- * if ( something_happens )
- * YY_FATAL_ERROR( "oops, the something happened" );
- * else
- * everything_okay();
- *
- * Prior to using the do-while the compiler would get upset at the
- * "else" because it interpreted the "if" statement as being all
- * done when it reached the ';' after the YY_FATAL_ERROR() call.
- */
-
- #define YY_FATAL_ERROR(msg) fatal_error(msg)
-
- #if 0
- #define YY_FATAL_ERROR(msg) \
- do \
- { \
- (void) fputs( msg, stderr ); \
- (void) putc( '\n', stderr ); \
- exit( 1 ); \
- } \
- while ( 0 )
- #endif
-
- /* default yywrap function - always treat EOF as an EOF */
- #define yywrap() 1
-
- /* enter a start condition. This macro really ought to take a parameter,
- * but we do it the disgusting crufty way forced on us by the ()-less
- * definition of BEGIN
- */
- #define BEGIN yy_start = 1 + 2 *
-
- /* action number for EOF rule of a given start state */
- #define YY_STATE_EOF(state) (YY_END_OF_BUFFER + state + 1)
-
- /* special action meaning "start processing a new file" */
- #define YY_NEW_FILE \
- do \
- { \
- yy_init_buffer( yy_current_buffer, yyin ); \
- yy_load_buffer_state(); \
- } \
- while ( 0 )
-
- /* default declaration of generated scanner - a define so the user can
- * easily add parameters
- */
- #define YY_DECL int yylex YY_PROTO(( void ))
-
- /* code executed at the end of each rule */
- #define YY_BREAK break;
-
- #define YY_END_OF_BUFFER_CHAR 0
-
- #ifndef YY_BUF_SIZE
- #define YY_BUF_SIZE (YY_READ_BUF_SIZE * 2) /* size of default input buffer */
- #endif
-
- typedef struct yy_buffer_state *YY_BUFFER_STATE;
-
- #define YY_CHAR unsigned char
- # line 1 "scanner.l"
- #define INITIAL 0
- # line 2 "scanner.l"
- /* SPIM S20 MIPS simulator.
- Lexical scanner.
- Copyright (C) 1990 by James Larus (larus@cs.wisc.edu).
-
- SPIM 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 1, or (at your option) any
- later version.
-
- SPIM 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 GNU CC; see the file COPYING. If not, write to James R.
- Larus, Computer Sciences Department, University of Wisconsin--Madison,
- 1210 West Dayton Street, Madison, WI 53706, USA or to the Free
- Software Foundation, 675 Mass Ave, Cambridge, MA 02139, USA. */
-
-
- /* $Header: /var/home/cs354/.spim/RCS/scanner.l,v 1.5 1992/10/12 11:41:52 cs354 Exp $
- */
-
-
- #include "y_tab.h"
- #include "spim.h"
- #include "inst.h"
- #include "mem.h"
-
- #ifndef YY_CHAR
- #define YY_CHAR char
- #endif
-
-
-
- /* YACC parser variable that holds value of token. */
-
- extern int yylval;
-
-
- /* Track which line we are reading and where it began in the buffer. */
-
- int line_no = 1;
-
- static YY_CHAR *line_start = NULL;
-
- extern unsigned int last_inst_addr;
-
- static double scan_float; /* Where FP values are kept */
-
- int y_str_length; /* Length of Y_STR */
-
-
- /* Local functions: */
-
- static int check_keyword (char *, int);
- static YY_CHAR *copy_str (YY_CHAR *, int);
-
- # line 65 "scanner.l"
-
- /* done after the current pattern has been matched and before the
- * corresponding action - sets up yytext
- */
- #define YY_DO_BEFORE_ACTION \
- yytext = yy_bp; \
- yyleng = yy_cp - yy_bp; \
- yy_hold_char = *yy_cp; \
- *yy_cp = '\0'; \
- yy_c_buf_p = yy_cp;
-
- #define EOB_ACT_CONTINUE_SCAN 0
- #define EOB_ACT_END_OF_FILE 1
- #define EOB_ACT_LAST_MATCH 2
-
- /* return all but the first 'n' matched characters back to the input stream */
- #define yyless(n) \
- do \
- { \
- /* undo effects of setting up yytext */ \
- *yy_cp = yy_hold_char; \
- yy_c_buf_p = yy_cp = yy_bp + n; \
- YY_DO_BEFORE_ACTION; /* set up yytext again */ \
- } \
- while ( 0 )
-
- #define unput(c) yyunput( c, yytext )
-
-
- struct yy_buffer_state
- {
- FILE *yy_input_file;
-
- YY_CHAR *yy_ch_buf; /* input buffer */
- YY_CHAR *yy_buf_pos; /* current position in input buffer */
-
- /* size of input buffer in bytes, not including room for EOB characters*/
- int yy_buf_size;
-
- /* number of characters read into yy_ch_buf, not including EOB characters */
- int yy_n_chars;
-
- int yy_eof_status; /* whether we've seen an EOF on this buffer */
- #define EOF_NOT_SEEN 0
- /* "pending" happens when the EOF has been seen but there's still
- * some text process
- */
- #define EOF_PENDING 1
- #define EOF_DONE 2
- };
-
- static YY_BUFFER_STATE yy_current_buffer;
-
- /* we provide macros for accessing buffer states in case in the
- * future we want to put the buffer states in a more general
- * "scanner state"
- */
- #define YY_CURRENT_BUFFER yy_current_buffer
-
-
- /* yy_hold_char holds the character lost when yytext is formed */
- static YY_CHAR yy_hold_char;
-
- static int yy_n_chars; /* number of characters read into yy_ch_buf */
-
-
-
- #ifndef YY_USER_ACTION
- #define YY_USER_ACTION
- #endif
-
- #ifndef YY_USER_INIT
- #define YY_USER_INIT
- #endif
-
- extern YY_CHAR *yytext;
- extern int yyleng;
- extern FILE *yyin, *yyout;
-
- YY_CHAR *yytext;
- int yyleng;
-
- FILE *yyin = (FILE *) 0, *yyout = (FILE *) 0;
-
- #define YY_END_OF_BUFFER 19
- typedef int yy_state_type;
- static const short int yy_accept[47] =
- { 0,
- 0, 0, 19, 17, 1, 2, 17, 9, 17, 17,
- 10, 10, 13, 10, 7, 3, 4, 14, 11, 12,
- 0, 15, 0, 9, 8, 0, 16, 0, 0, 3,
- 4, 7, 6, 3, 0, 4, 15, 16, 3, 4,
- 6, 6, 6, 5, 6, 0
- } ;
-
- static const YY_CHAR yy_ec[256] =
- { 0,
- 1, 1, 1, 1, 1, 1, 1, 1, 2, 3,
- 1, 1, 1, 1, 1, 1, 1, 1, 1, 1,
- 1, 1, 1, 1, 1, 1, 1, 1, 1, 1,
- 1, 2, 1, 4, 5, 6, 1, 1, 7, 8,
- 8, 1, 9, 10, 11, 12, 1, 13, 14, 14,
- 14, 14, 14, 14, 14, 15, 15, 8, 1, 1,
- 1, 1, 16, 1, 17, 17, 17, 17, 17, 17,
- 18, 18, 18, 18, 18, 18, 18, 18, 18, 18,
- 18, 18, 18, 18, 18, 18, 18, 18, 18, 18,
- 19, 20, 21, 1, 18, 1, 17, 17, 17, 17,
-
- 22, 17, 18, 18, 18, 18, 18, 18, 18, 18,
- 18, 18, 18, 18, 18, 18, 18, 18, 18, 23,
- 18, 18, 1, 1, 1, 1, 1, 1, 1, 1,
- 1, 1, 1, 1, 1, 1, 1, 1, 1, 1,
- 1, 1, 1, 1, 1, 1, 1, 1, 1, 1,
- 1, 1, 1, 1, 1, 1, 1, 1, 1, 1,
- 1, 1, 1, 1, 1, 1, 1, 1, 1, 1,
- 1, 1, 1, 1, 1, 1, 1, 1, 1, 1,
- 1, 1, 1, 1, 1, 1, 1, 1, 1, 1,
- 1, 1, 1, 1, 1, 1, 1, 1, 1, 1,
-
- 1, 1, 1, 1, 1, 1, 1, 1, 1, 1,
- 1, 1, 1, 1, 1, 1, 1, 1, 1, 1,
- 1, 1, 1, 1, 1, 1, 1, 1, 1, 1,
- 1, 1, 1, 1, 1, 1, 1, 1, 1, 1,
- 1, 1, 1, 1, 1, 1, 1, 1, 1, 1,
- 1, 1, 1, 1, 1
- } ;
-
- static const YY_CHAR yy_meta[24] =
- { 0,
- 1, 1, 2, 1, 1, 3, 1, 1, 4, 1,
- 4, 5, 6, 6, 6, 1, 7, 8, 1, 1,
- 1, 7, 8
- } ;
-
- static const short int yy_base[57] =
- { 0,
- 0, 0, 90, 118, 118, 118, 20, 0, 0, 18,
- 118, 13, 118, 16, 0, 29, 70, 118, 118, 118,
- 28, 118, 29, 0, 0, 27, 118, 30, 53, 22,
- 51, 0, 44, 39, 0, 48, 41, 44, 23, 27,
- 54, 0, 45, 0, 57, 118, 72, 80, 86, 94,
- 98, 102, 104, 106, 107, 111
- } ;
-
- static const short int yy_def[57] =
- { 0,
- 46, 1, 46, 46, 46, 46, 47, 48, 49, 50,
- 46, 46, 46, 46, 51, 46, 52, 46, 46, 46,
- 47, 46, 47, 48, 49, 50, 46, 50, 53, 16,
- 54, 51, 46, 16, 55, 52, 47, 50, 30, 54,
- 46, 33, 56, 55, 46, 0, 46, 46, 46, 46,
- 46, 46, 46, 46, 46, 46
- } ;
-
- static const short int yy_nxt[142] =
- { 0,
- 4, 5, 6, 7, 8, 9, 10, 11, 12, 13,
- 14, 15, 16, 17, 17, 18, 15, 15, 19, 4,
- 20, 15, 15, 22, 27, 29, 29, 29, 30, 31,
- 31, 22, 37, 27, 39, 39, 38, 28, 33, 23,
- 33, 34, 34, 29, 22, 46, 28, 23, 23, 28,
- 27, 35, 41, 41, 41, 41, 42, 42, 42, 33,
- 23, 46, 33, 28, 33, 43, 45, 45, 45, 45,
- 45, 45, 21, 21, 21, 21, 21, 21, 21, 21,
- 24, 33, 24, 24, 24, 24, 24, 24, 25, 46,
- 25, 25, 25, 25, 26, 26, 26, 26, 26, 26,
-
- 26, 26, 32, 32, 32, 32, 36, 36, 29, 29,
- 40, 40, 44, 44, 45, 46, 45, 3, 46, 46,
- 46, 46, 46, 46, 46, 46, 46, 46, 46, 46,
- 46, 46, 46, 46, 46, 46, 46, 46, 46, 46,
- 46
- } ;
-
- static const short int yy_chk[142] =
- { 0,
- 1, 1, 1, 1, 1, 1, 1, 1, 1, 1,
- 1, 1, 1, 1, 1, 1, 1, 1, 1, 1,
- 1, 1, 1, 7, 10, 12, 12, 12, 14, 14,
- 14, 21, 23, 26, 30, 30, 28, 10, 40, 7,
- 16, 16, 16, 16, 37, 39, 26, 21, 23, 28,
- 38, 16, 33, 43, 33, 43, 33, 33, 33, 36,
- 37, 34, 31, 38, 29, 33, 41, 41, 41, 45,
- 45, 45, 47, 47, 47, 47, 47, 47, 47, 47,
- 48, 17, 48, 48, 48, 48, 48, 48, 49, 3,
- 49, 49, 49, 49, 50, 50, 50, 50, 50, 50,
-
- 50, 50, 51, 51, 51, 51, 52, 52, 53, 53,
- 54, 54, 55, 55, 56, 0, 56, 46, 46, 46,
- 46, 46, 46, 46, 46, 46, 46, 46, 46, 46,
- 46, 46, 46, 46, 46, 46, 46, 46, 46, 46,
- 46
- } ;
-
- static yy_state_type yy_last_accepting_state;
- static YY_CHAR *yy_last_accepting_cpos;
-
- /* the intent behind this definition is that it'll catch
- * any uses of REJECT which flex missed
- */
- #define REJECT reject_used_but_not_detected
- #define yymore() yymore_used_but_not_detected
- #define YY_MORE_ADJ 0
-
- /* these variables are all declared out here so that section 3 code can
- * manipulate them
- */
- /* points to current character in buffer */
- static YY_CHAR *yy_c_buf_p = (YY_CHAR *) 0;
- static int yy_init = 1; /* whether we need to initialize */
- static int yy_start = 0; /* start state number */
-
- /* flag which is used to allow yywrap()'s to do buffer switches
- * instead of setting up a fresh yyin. A bit of a hack ...
- */
- static int yy_did_buffer_switch_on_eof;
-
- static yy_state_type yy_get_previous_state YY_PROTO(( void ));
- static yy_state_type yy_try_NUL_trans YY_PROTO(( yy_state_type current_state ));
- static int yy_get_next_buffer YY_PROTO(( void ));
- static void yyunput YY_PROTO(( YY_CHAR c, YY_CHAR *buf_ptr ));
- void yyrestart YY_PROTO(( FILE *input_file ));
- void yy_switch_to_buffer YY_PROTO(( YY_BUFFER_STATE new_buffer ));
- void yy_load_buffer_state YY_PROTO(( void ));
- YY_BUFFER_STATE yy_create_buffer YY_PROTO(( FILE *file, int size ));
- void yy_delete_buffer YY_PROTO(( YY_BUFFER_STATE b ));
- void yy_init_buffer YY_PROTO(( YY_BUFFER_STATE b, FILE *file ));
-
- #define yy_new_buffer yy_create_buffer
-
- #ifdef __cplusplus
- static int yyinput YY_PROTO(( void ));
- #else
- static int input YY_PROTO(( void ));
- #endif
-
- YY_DECL
- {
- register yy_state_type yy_current_state;
- register YY_CHAR *yy_cp, *yy_bp;
- register int yy_act;
-
- char *temp_str;
-
-
- if ( yy_init )
- {
- YY_USER_INIT;
-
- if ( ! yy_start )
- yy_start = 1; /* first start state */
-
- if ( ! yyin )
- yyin = stdin;
-
- if ( ! yyout )
- yyout = stdout;
-
- if ( yy_current_buffer )
- yy_init_buffer( yy_current_buffer, yyin );
- else
- yy_current_buffer = yy_create_buffer( yyin, YY_BUF_SIZE );
-
- yy_load_buffer_state();
-
- yy_init = 0;
- }
-
- while ( 1 ) /* loops until end-of-file is reached */
- {
- yy_cp = yy_c_buf_p;
-
- /* support of yytext */
- *yy_cp = yy_hold_char;
-
- /* yy_bp points to the position in yy_ch_buf of the start of the
- * current run.
- */
- yy_bp = yy_cp;
-
- yy_current_state = yy_start;
- yy_match:
- do
- {
- register YY_CHAR yy_c = yy_ec[*yy_cp];
- if ( yy_accept[yy_current_state] )
- {
- yy_last_accepting_state = yy_current_state;
- yy_last_accepting_cpos = yy_cp;
- }
- while ( yy_chk[yy_base[yy_current_state] + yy_c] != yy_current_state )
- {
- yy_current_state = yy_def[yy_current_state];
- if ( yy_current_state >= 47 )
- yy_c = yy_meta[yy_c];
- }
- yy_current_state = yy_nxt[yy_base[yy_current_state] + yy_c];
- ++yy_cp;
- }
- while ( yy_base[yy_current_state] != 118 );
-
- yy_find_action:
- yy_act = yy_accept[yy_current_state];
-
- YY_DO_BEFORE_ACTION;
- YY_USER_ACTION;
-
- do_action: /* this label is used only to access EOF actions */
-
-
- switch ( yy_act )
- {
- case 0: /* must backtrack */
- /* undo the effects of YY_DO_BEFORE_ACTION */
- *yy_cp = yy_hold_char;
- yy_cp = yy_last_accepting_cpos;
- yy_current_state = yy_last_accepting_state;
- goto yy_find_action;
-
- case 1:
- # line 67 "scanner.l"
- {if (line_start == NULL) line_start = yytext;}
- YY_BREAK
- case 2:
- # line 70 "scanner.l"
- {line_no += 1;
- return (Y_NL);}
- YY_BREAK
- case 3:
- # line 74 "scanner.l"
- {/*int x;
- sscanf (yytext, "%o", &yylval);*/
- yylval = atoi ((char *) yytext);
- if (line_start == NULL) line_start = yytext;
- return (Y_INT);}
- YY_BREAK
- case 4:
- # line 80 "scanner.l"
- {/*int x;
- sscanf (yytext, "%d", &yylval);*/
- yylval = atoi ((char *) yytext);
- if (line_start == NULL) line_start = yytext;
- return (Y_INT);}
- YY_BREAK
- case 5:
- # line 87 "scanner.l"
- {if (*yytext == '-')
- {
- sscanf((char *) yytext+3, "%lx", &yylval);
- yylval = -yylval;
- }
- else
- {
- sscanf((char *) yytext+2, "%lx", &yylval);
- }
-
- if (line_start == NULL) line_start = yytext;
- return (Y_INT);}
- YY_BREAK
- case 6:
- # line 101 "scanner.l"
- {
- scan_float = atof ((char *) yytext);
- yylval = (int) &scan_float;
- if (line_start == NULL) line_start = yytext;
- return (Y_FP);}
- YY_BREAK
- case 7:
- # line 108 "scanner.l"
- {int token = check_keyword ((char *) yytext, !bare_machine);
- if (line_start == NULL) line_start = yytext;
- if (token != 0)
- {
- yylval = token;
- line_start = yytext;
- return (token);
- }
- temp_str = malloc (strlen ((char *) yytext)+1);
- if ( !temp_str )
- YY_FATAL_ERROR("Scanner ran out of memory copying a string.");
- yylval = (int) strcpy (temp_str,
- (char *) yytext);
- return (Y_ID);}
- YY_BREAK
- case 8:
- # line 121 "scanner.l"
- {int reg_no = register_name_to_number ((char *) yytext + 1);
- if (line_start == NULL) line_start = yytext;
- if (reg_no != -1
- && *(yytext + 1) == 'f' && *(yytext + 2) != 'p')
- {
- yylval = reg_no;
- return (Y_FP_REG);
- }
- else if (reg_no < 0 || reg_no > 31)
- {
- temp_str = malloc (strlen ((char *) yytext)+1);
- if ( !temp_str )
- YY_FATAL_ERROR("Scanner ran out of memory copying a string.");
- yylval = (int) strcpy (temp_str,
- (char *) yytext);
- return (Y_ID);
- }
- else
- {
- yylval =reg_no;
- return (Y_REG);
- }}
- YY_BREAK
- case 9:
- # line 142 "scanner.l"
- {if (line_start == NULL) line_start = yytext;}
- YY_BREAK
- case 10:
- # line 145 "scanner.l"
- {if (line_start == NULL) line_start = yytext;
- return (*yytext);}
- YY_BREAK
- case 11:
- # line 148 "scanner.l"
- {if (line_start == NULL) line_start = yytext;
- return (*yytext);}
- YY_BREAK
- case 12:
- # line 151 "scanner.l"
- {if (line_start == NULL) line_start = yytext;
- return (*yytext);}
- YY_BREAK
- case 13:
- # line 154 "scanner.l"
- {if (line_start == NULL) line_start = yytext;}
- YY_BREAK
- case 14:
- # line 156 "scanner.l"
- {if (line_start == NULL) line_start = yytext;
- temp_str = malloc (strlen ((char *) yytext)+1);
- if ( !temp_str )
- YY_FATAL_ERROR("Scanner ran out of memory copying a string.");
- yylval = (int) strcpy (temp_str,
- (char *) yytext);
- /* For top level */
- return (Y_ID);}
- YY_BREAK
- case 15:
- # line 163 "scanner.l"
- {if (line_start == NULL) line_start = yytext;
- yylval = (int) copy_str (yytext + 1, 1);
- return (Y_STR);}
- YY_BREAK
- case 16:
- # line 167 "scanner.l"
- {if (line_start == NULL) line_start = yytext;
- yylval = (int) copy_str (yytext + 1, 1);
- return (Y_STR);}
- YY_BREAK
- case 17:
- # line 171 "scanner.l"
- {if (line_start == NULL) line_start = yytext;
- yyerror ("Unknown character");}
- YY_BREAK
- case 18:
- # line 174 "scanner.l"
- ECHO;
- YY_BREAK
- case YY_STATE_EOF(INITIAL):
- yyterminate();
-
- case YY_END_OF_BUFFER:
- {
- /* amount of text matched not including the EOB char */
- int yy_amount_of_matched_text = yy_cp - yytext - 1;
-
- /* undo the effects of YY_DO_BEFORE_ACTION */
- *yy_cp = yy_hold_char;
-
- /* note that here we test for yy_c_buf_p "<=" to the position
- * of the first EOB in the buffer, since yy_c_buf_p will
- * already have been incremented past the NUL character
- * (since all states make transitions on EOB to the end-
- * of-buffer state). Contrast this with the test in yyinput().
- */
- if ( yy_c_buf_p <= &yy_current_buffer->yy_ch_buf[yy_n_chars] )
- /* this was really a NUL */
- {
- yy_state_type yy_next_state;
-
- yy_c_buf_p = yytext + yy_amount_of_matched_text;
-
- yy_current_state = yy_get_previous_state();
-
- /* okay, we're now positioned to make the
- * NUL transition. We couldn't have
- * yy_get_previous_state() go ahead and do it
- * for us because it doesn't know how to deal
- * with the possibility of jamming (and we
- * don't want to build jamming into it because
- * then it will run more slowly)
- */
-
- yy_next_state = yy_try_NUL_trans( yy_current_state );
-
- yy_bp = yytext + YY_MORE_ADJ;
-
- if ( yy_next_state )
- {
- /* consume the NUL */
- yy_cp = ++yy_c_buf_p;
- yy_current_state = yy_next_state;
- goto yy_match;
- }
-
- else
- {
- goto yy_find_action;
- }
- }
-
- else switch ( yy_get_next_buffer() )
- {
- case EOB_ACT_END_OF_FILE:
- {
- yy_did_buffer_switch_on_eof = 0;
-
- if ( yywrap() )
- {
- /* note: because we've taken care in
- * yy_get_next_buffer() to have set up yytext,
- * we can now set up yy_c_buf_p so that if some
- * total hoser (like flex itself) wants
- * to call the scanner after we return the
- * YY_NULL, it'll still work - another YY_NULL
- * will get returned.
- */
- yy_c_buf_p = yytext + YY_MORE_ADJ;
-
- yy_act = YY_STATE_EOF((yy_start - 1) / 2);
- goto do_action;
- }
-
- else
- {
- if ( ! yy_did_buffer_switch_on_eof )
- YY_NEW_FILE;
- }
- }
- break;
-
- case EOB_ACT_CONTINUE_SCAN:
- yy_c_buf_p = yytext + yy_amount_of_matched_text;
-
- yy_current_state = yy_get_previous_state();
-
- yy_cp = yy_c_buf_p;
- yy_bp = yytext + YY_MORE_ADJ;
- goto yy_match;
-
- case EOB_ACT_LAST_MATCH:
- yy_c_buf_p =
- &yy_current_buffer->yy_ch_buf[yy_n_chars];
-
- yy_current_state = yy_get_previous_state();
-
- yy_cp = yy_c_buf_p;
- yy_bp = yytext + YY_MORE_ADJ;
- goto yy_find_action;
- }
- break;
- }
-
- default:
- #ifdef FLEX_DEBUG
- printf( "action # %d\n", yy_act );
- #endif
- YY_FATAL_ERROR(
- "fatal flex scanner internal error--no action found" );
- }
- }
- }
-
-
- /* yy_get_next_buffer - try to read in a new buffer
- *
- * synopsis
- * int yy_get_next_buffer();
- *
- * returns a code representing an action
- * EOB_ACT_LAST_MATCH -
- * EOB_ACT_CONTINUE_SCAN - continue scanning from current position
- * EOB_ACT_END_OF_FILE - end of file
- */
-
- static int yy_get_next_buffer()
-
- {
- register YY_CHAR *dest = yy_current_buffer->yy_ch_buf;
- register YY_CHAR *source = yytext - 1; /* copy prev. char, too */
- register int number_to_move, i;
- int ret_val;
-
- if ( yy_c_buf_p > &yy_current_buffer->yy_ch_buf[yy_n_chars + 1] )
- YY_FATAL_ERROR(
- "fatal flex scanner internal error--end of buffer missed" );
-
- /* try to read more data */
-
- /* first move last chars to start of buffer */
- number_to_move = yy_c_buf_p - yytext;
-
- for ( i = 0; i < number_to_move; ++i )
- *(dest++) = *(source++);
-
- if ( yy_current_buffer->yy_eof_status != EOF_NOT_SEEN )
- /* don't do the read, it's not guaranteed to return an EOF,
- * just force an EOF
- */
- yy_n_chars = 0;
-
- else
- {
- int num_to_read = yy_current_buffer->yy_buf_size - number_to_move - 1;
-
- if ( num_to_read > YY_READ_BUF_SIZE )
- num_to_read = YY_READ_BUF_SIZE;
-
- else if ( num_to_read <= 0 )
- YY_FATAL_ERROR( "fatal error - scanner input buffer overflow" );
-
- /* read in more data */
- YY_INPUT( (&yy_current_buffer->yy_ch_buf[number_to_move]),
- yy_n_chars, num_to_read );
- }
-
- if ( yy_n_chars == 0 )
- {
- if ( number_to_move == 1 )
- {
- ret_val = EOB_ACT_END_OF_FILE;
- yy_current_buffer->yy_eof_status = EOF_DONE;
- }
-
- else
- {
- ret_val = EOB_ACT_LAST_MATCH;
- yy_current_buffer->yy_eof_status = EOF_PENDING;
- }
- }
-
- else
- ret_val = EOB_ACT_CONTINUE_SCAN;
-
- yy_n_chars += number_to_move;
- yy_current_buffer->yy_ch_buf[yy_n_chars] = YY_END_OF_BUFFER_CHAR;
- yy_current_buffer->yy_ch_buf[yy_n_chars + 1] = YY_END_OF_BUFFER_CHAR;
-
- /* yytext begins at the second character in yy_ch_buf; the first
- * character is the one which preceded it before reading in the latest
- * buffer; it needs to be kept around in case it's a newline, so
- * yy_get_previous_state() will have with '^' rules active
- */
-
- yytext = &yy_current_buffer->yy_ch_buf[1];
-
- return ( ret_val );
- }
-
-
- /* yy_get_previous_state - get the state just before the EOB char was reached
- *
- * synopsis
- * yy_state_type yy_get_previous_state();
- */
-
- static yy_state_type yy_get_previous_state()
-
- {
- register yy_state_type yy_current_state;
- register YY_CHAR *yy_cp;
-
- yy_current_state = yy_start;
-
- for ( yy_cp = yytext + YY_MORE_ADJ; yy_cp < yy_c_buf_p; ++yy_cp )
- {
- register YY_CHAR yy_c = (*yy_cp ? yy_ec[*yy_cp] : 1);
- if ( yy_accept[yy_current_state] )
- {
- yy_last_accepting_state = yy_current_state;
- yy_last_accepting_cpos = yy_cp;
- }
- while ( yy_chk[yy_base[yy_current_state] + yy_c] != yy_current_state )
- {
- yy_current_state = yy_def[yy_current_state];
- if ( yy_current_state >= 47 )
- yy_c = yy_meta[yy_c];
- }
- yy_current_state = yy_nxt[yy_base[yy_current_state] + yy_c];
- }
-
- return ( yy_current_state );
- }
-
-
- /* yy_try_NUL_trans - try to make a transition on the NUL character
- *
- * synopsis
- * next_state = yy_try_NUL_trans( current_state );
- */
-
- #ifdef YY_USE_PROTOS
- static yy_state_type yy_try_NUL_trans( register yy_state_type yy_current_state )
- #else
- static yy_state_type yy_try_NUL_trans( yy_current_state )
- register yy_state_type yy_current_state;
- #endif
-
- {
- register int yy_is_jam;
- register YY_CHAR *yy_cp = yy_c_buf_p;
-
- register YY_CHAR yy_c = 1;
- if ( yy_accept[yy_current_state] )
- {
- yy_last_accepting_state = yy_current_state;
- yy_last_accepting_cpos = yy_cp;
- }
- while ( yy_chk[yy_base[yy_current_state] + yy_c] != yy_current_state )
- {
- yy_current_state = yy_def[yy_current_state];
- if ( yy_current_state >= 47 )
- yy_c = yy_meta[yy_c];
- }
- yy_current_state = yy_nxt[yy_base[yy_current_state] + yy_c];
- yy_is_jam = (yy_base[yy_current_state] == 118);
-
- return ( yy_is_jam ? 0 : yy_current_state );
- }
-
-
- #ifdef YY_USE_PROTOS
- static void yyunput( YY_CHAR c, register YY_CHAR *yy_bp )
- #else
- static void yyunput( c, yy_bp )
- YY_CHAR c;
- register YY_CHAR *yy_bp;
- #endif
-
- {
- register YY_CHAR *yy_cp = yy_c_buf_p;
-
- /* undo effects of setting up yytext */
- *yy_cp = yy_hold_char;
-
- if ( yy_cp < yy_current_buffer->yy_ch_buf + 2 )
- { /* need to shift things up to make room */
- register int number_to_move = yy_n_chars + 2; /* +2 for EOB chars */
- register YY_CHAR *dest =
- &yy_current_buffer->yy_ch_buf[yy_current_buffer->yy_buf_size + 2];
- register YY_CHAR *source =
- &yy_current_buffer->yy_ch_buf[number_to_move];
-
- while ( source > yy_current_buffer->yy_ch_buf )
- *--dest = *--source;
-
- yy_cp += dest - source;
- yy_bp += dest - source;
- yy_n_chars = yy_current_buffer->yy_buf_size;
-
- if ( yy_cp < yy_current_buffer->yy_ch_buf + 2 )
- YY_FATAL_ERROR( "flex scanner push-back overflow" );
- }
-
- if ( yy_cp > yy_bp && yy_cp[-1] == '\n' )
- yy_cp[-2] = '\n';
-
- *--yy_cp = c;
-
- /* note: the formal parameter *must* be called "yy_bp" for this
- * macro to now work correctly
- */
- YY_DO_BEFORE_ACTION; /* set up yytext again */
- }
-
-
- #ifdef __cplusplus
- static int yyinput()
- #else
- static int input()
- #endif
-
- {
- int c;
- YY_CHAR *yy_cp = yy_c_buf_p;
-
- *yy_cp = yy_hold_char;
-
- if ( *yy_c_buf_p == YY_END_OF_BUFFER_CHAR )
- {
- /* yy_c_buf_p now points to the character we want to return.
- * If this occurs *before* the EOB characters, then it's a
- * valid NUL; if not, then we've hit the end of the buffer.
- */
- if ( yy_c_buf_p < &yy_current_buffer->yy_ch_buf[yy_n_chars] )
- /* this was really a NUL */
- *yy_c_buf_p = '\0';
-
- else
- { /* need more input */
- yytext = yy_c_buf_p;
- ++yy_c_buf_p;
-
- switch ( yy_get_next_buffer() )
- {
- case EOB_ACT_END_OF_FILE:
- {
- if ( yywrap() )
- {
- yy_c_buf_p = yytext + YY_MORE_ADJ;
- return ( EOF );
- }
-
- YY_NEW_FILE;
-
- #ifdef __cplusplus
- return ( yyinput() );
- #else
- return ( input() );
- #endif
- }
- break;
-
- case EOB_ACT_CONTINUE_SCAN:
- yy_c_buf_p = yytext + YY_MORE_ADJ;
- break;
-
- case EOB_ACT_LAST_MATCH:
- #ifdef __cplusplus
- YY_FATAL_ERROR( "unexpected last match in yyinput()" );
- #else
- YY_FATAL_ERROR( "unexpected last match in input()" );
- #endif
- }
- }
- }
-
- c = *yy_c_buf_p;
- yy_hold_char = *++yy_c_buf_p;
-
- return ( c );
- }
-
-
- #ifdef YY_USE_PROTOS
- void yyrestart( FILE *input_file )
- #else
- void yyrestart( input_file )
- FILE *input_file;
- #endif
-
- {
- yy_init_buffer( yy_current_buffer, input_file );
- yy_load_buffer_state();
- }
-
-
- #ifdef YY_USE_PROTOS
- void yy_switch_to_buffer( YY_BUFFER_STATE new_buffer )
- #else
- void yy_switch_to_buffer( new_buffer )
- YY_BUFFER_STATE new_buffer;
- #endif
-
- {
- if ( yy_current_buffer == new_buffer )
- return;
-
- if ( yy_current_buffer )
- {
- /* flush out information for old buffer */
- *yy_c_buf_p = yy_hold_char;
- yy_current_buffer->yy_buf_pos = yy_c_buf_p;
- yy_current_buffer->yy_n_chars = yy_n_chars;
- }
-
- yy_current_buffer = new_buffer;
- yy_load_buffer_state();
-
- /* we don't actually know whether we did this switch during
- * EOF (yywrap()) processing, but the only time this flag
- * is looked at is after yywrap() is called, so it's safe
- * to go ahead and always set it.
- */
- yy_did_buffer_switch_on_eof = 1;
- }
-
-
- #ifdef YY_USE_PROTOS
- void yy_load_buffer_state( void )
- #else
- void yy_load_buffer_state()
- #endif
-
- {
- yy_n_chars = yy_current_buffer->yy_n_chars;
- yytext = yy_c_buf_p = yy_current_buffer->yy_buf_pos;
- yyin = yy_current_buffer->yy_input_file;
- yy_hold_char = *yy_c_buf_p;
- }
-
-
- #ifdef YY_USE_PROTOS
- YY_BUFFER_STATE yy_create_buffer( FILE *file, int size )
- #else
- YY_BUFFER_STATE yy_create_buffer( file, size )
- FILE *file;
- int size;
- #endif
-
- {
- YY_BUFFER_STATE b;
-
- #ifdef MACINTOSH
- b = (YY_BUFFER_STATE) NewPtr(sizeof(struct yy_buffer_state));
- #else
- b = (YY_BUFFER_STATE) malloc( sizeof( struct yy_buffer_state ) );
- #endif
-
- if ( ! b )
- YY_FATAL_ERROR( "out of dynamic memory in yy_create_buffer()" );
-
- b->yy_buf_size = size;
-
- /* yy_ch_buf has to be 2 characters longer than the size given because
- * we need to put in 2 end-of-buffer characters.
- */
- #ifdef MACINTOSH
- b->yy_ch_buf = (YY_CHAR *) NewPtr( (unsigned) (b->yy_buf_size + 2) );
- #else
- b->yy_ch_buf = (YY_CHAR *) malloc( (unsigned) (b->yy_buf_size + 2) );
- #endif
-
- if ( ! b->yy_ch_buf )
- YY_FATAL_ERROR( "out of dynamic memory in yy_create_buffer()" );
-
- yy_init_buffer( b, file );
-
- return ( b );
- }
-
-
- #ifdef YY_USE_PROTOS
- void yy_delete_buffer( YY_BUFFER_STATE b )
- #else
- void yy_delete_buffer( b )
- YY_BUFFER_STATE b;
- #endif
-
- {
- if ( b == yy_current_buffer )
- yy_current_buffer = (YY_BUFFER_STATE) 0;
-
- free( (char *) b->yy_ch_buf );
- free( (char *) b );
- }
-
-
- #ifdef YY_USE_PROTOS
- void yy_init_buffer( YY_BUFFER_STATE b, FILE *file )
- #else
- void yy_init_buffer( b, file )
- YY_BUFFER_STATE b;
- FILE *file;
- #endif
-
- {
- b->yy_input_file = file;
-
- /* we put in the '\n' and start reading from [1] so that an
- * initial match-at-newline will be true.
- */
-
- b->yy_ch_buf[0] = '\n';
- b->yy_n_chars = 1;
-
- /* we always need two end-of-buffer characters. The first causes
- * a transition to the end-of-buffer state. The second causes
- * a jam in that state.
- */
- b->yy_ch_buf[1] = YY_END_OF_BUFFER_CHAR;
- b->yy_ch_buf[2] = YY_END_OF_BUFFER_CHAR;
-
- b->yy_buf_pos = &b->yy_ch_buf[1];
-
- b->yy_eof_status = EOF_NOT_SEEN;
- }
- # line 174 "scanner.l"
-
-
-
-
- void initialize_scanner (FILE *in_file)
- {
- yyin = in_file;
- #ifdef FLEX_SCANNER
- yy_init = 1;
- #endif
- line_no = 1;
- line_start = NULL;
- }
-
-
- void scanner_start_line (void)
- {
- if (last_inst_addr && line_start) {
- int len;
- instruction *insn;
- READ_MEM_INST(insn, last_inst_addr);
- if (insn) {
- len = strlen(line_start);
- if (NULL == (COMMENT(insn) = (char *)malloc(len+1))) {
- fatal_error("Out of memory.\n");
- #if 0
- fprintf(stderr, "Out of memory.\n");
- exit(-1);
- #endif
- }
- bcopy(line_start, COMMENT(insn), len+1);
- if ((COMMENT(insn))[len-1] == '\n')
- (COMMENT(insn))[len-1] = '\0';
- last_inst_addr = 0;
- SET_MEM_INST(last_inst_addr, insn);
- }
- }
- line_start = NULL;
- }
-
-
- #ifndef FLEX_SCANNER
- /* We don't use -ll */
- int yywrap () {return 1;}
- #endif
-
-
- /* Return a freshly-allocated copy of STRING with the last CHOP
- characters removed. */
-
- static YY_CHAR *copy_str (YY_CHAR *str, int chop)
- {
- register int new_len = strlen (str) - chop;
- register YY_CHAR *new_str = (YY_CHAR *) malloc (new_len + 1), *n;
-
- if ( !new_str )
- YY_FATAL_ERROR("Scanner ran out of memory in copy_str().\n");
-
- for (n = new_str; *str != '\0' && new_len > 0; new_len -= 1)
- if (*str == '\\')
- switch (*(str + 1))
- {
- case 'n':
- {
- *n ++ = '\n';
- str += 2;
- new_len -= 1;
- continue;
- }
- case 't':
- {
- *n ++ = '\t';
- str += 2;
- new_len -= 1;
- continue;
- }
- case '0':
- {
- *n ++ = '\0';
- str += 2;
- new_len -= 1;
- continue;
- }
- case '"':
- {
- *n ++ = '"';
- str += 2;
- new_len -= 1;
- continue;
- }
- case 'X':
- {
- YY_CHAR c1 = *(str + 2), c2 = *(str + 3);
- int b = 0;
-
- if ('0' <= c1 && c1 <= '9') b = c1 - '0';
- else if ('A' <= c1 && c1 <= 'F') b = c1 - 'A' + 10;
- else yyerror ("Bad character in \\X construct in string");
-
- b <<= 4;
- if ('0' <= c2 && c2 <= '9') b += c2 - '0';
- else if ('A' <= c2 && c2 <= 'F') b += c2 - 'A' + 10;
- else yyerror ("Bad character in \\X construct in string");
-
- *n ++ = (YY_CHAR) b;
- str += 4;
- new_len -= 3;
- continue;
- }
- default:
- {
- *n ++ = *str ++;
- continue;
- }
- }
- else
- *n ++ = *str ++;
-
- *n = '\0';
- y_str_length = n - new_str;
- return (new_str);
- }
-
-
- /* On a parse error, write out the current line and print a caret (^)
- below the point at which the error occured. Also, reset the input
- stream to the begining of the next line. */
-
- void print_erroneous_line (void)
- {
- int prefix_length = yytext - line_start;
- int i, c;
- #define BSIZE 1024
- YY_CHAR buffer[BSIZE], *bp = buffer;
-
- if (line_start == NULL) return;
-
- error (" ");
- c = *(line_start + prefix_length);
- *(line_start + prefix_length) = '\0';
- sprintf(mess_buff, "%s", line_start);
- error (mess_buff);
- *(line_start + prefix_length) = c;
- sprintf(mess_buff, "%s", yytext);
- error (mess_buff);
-
- /* Flush the rest of the line. */
- if (*yytext != '\n')
- {
- int suffix_length = 0;
-
- while ((c = input ()) != '\n' && c != EOF)
- {
- *bp ++ = c;
- suffix_length += 1;
- }
- *bp = '\0';
- sprintf(mess_buff, "%s\n", buffer);
- error (mess_buff);
- #ifdef FLEX_SCANNER
- if (c == '\n') unput('\n');
- #endif
- line_start = NULL;
- }
-
- error (" ");
- while (prefix_length >= 50) {
- error(" ");
- prefix_length -= 50;
- }
- for (i = 0; i < prefix_length; i ++) buffer[i] = ' ';
- buffer[i] = '\0';
- sprintf(mess_buff, "%s^\n", buffer);
- error (mess_buff);
- }
-
-
- static inst_info keyword_tbl [] = {
- #undef OP
- #define OP(NAME, OPCODE, TYPE, R_OPCODE) {NAME, OPCODE, TYPE},
- #include "op.h"
- };
-
-
- static int check_keyword (char *id, int allow_pseudo_ops)
- {
- inst_info *entry =
- map_string_to_inst_info (keyword_tbl,
- sizeof(keyword_tbl) / sizeof (inst_info),
- id);
- if (entry == NULL)
- return (0);
- else if (!allow_pseudo_ops && entry->value2 == PSEUDO_OP)
- return (0);
- else
- return (entry->value1);
- }
-
-
- static inst_info register_tbl [] = {
- {"a0", 4, 0},
- {"a1", 5, 0},
- {"a2", 6, 0},
- {"a3", 7, 0},
- {"at", 1, 0},
- {"fp", 30, 0},
- {"gp", 28, 0},
- {"k0", 26, 0},
- {"k1", 27, 0},
- {"kt0", 26, 0},
- {"kt1", 27, 0},
- {"ra", 31, 0},
- {"s0", 16, 0},
- {"s1", 17, 0},
- {"s2", 18, 0},
- {"s3", 19, 0},
- {"s4", 20, 0},
- {"s5", 21, 0},
- {"s6", 22, 0},
- {"s7", 23, 0},
- {"s8", 30, 0},
- {"sp", 29, 0},
- {"t0", 8, 0},
- {"t1", 9, 0},
- {"t2", 10, 0},
- {"t3", 11, 0},
- {"t4", 12, 0},
- {"t5", 13, 0},
- {"t6", 14, 0},
- {"t7", 15, 0},
- {"t8", 24, 0},
- {"t9", 25, 0},
- {"v0", 2, 0},
- {"v1", 3, 0},
- {"zero", 0, 0}
- };
-
-
- int register_name_to_number (const char *name)
- {
- register int c1 = *name, c2 = *(name + 1);
-
- if ('0' <= c1 && c1 <= '9'
- && (c2 == '\0' || (('0' <= c2 && c2 <= '9') && *(name + 2) == '\0')))
- return (atoi (name));
- else if (c1 == 'f' && c2 >= '0' && c2 <= '9')
- return atoi (name + 1);
- else
- {
- inst_info *entry =
- map_string_to_inst_info (register_tbl,
- sizeof (register_tbl) / sizeof (inst_info),
- name);
- if (entry == NULL)
- return (-1);
- else
- return (entry->value1);
- }
- }
-
-