assembly language source file reading now does end of buffer

[unix-history] / usr / src / old / as.vax / as.h

diff --git a/usr/src/old/as.vax/as.h b/usr/src/old/as.vax/as.h
index b1139c6..8558b0d 100644 (file)
--- a/usr/src/old/as.vax/as.h
+++ b/usr/src/old/as.vax/as.h
@@ -1,10 +1,14 @@
-/* Copyright (c) 1980 Regents of the University of California */
-/* "@(#)as.h 4.7 %G%" */
+/*
+ *     Copyright (c) 1982 Regents of the University of California
+ *     @(#)as.h 4.14 %G%
+ */

 #ifdef VMS
 # define       vax     1
 # define       VAX     1
 #endif VMS
 
 #ifdef VMS
 # define       vax     1
 # define       VAX     1
 #endif VMS
 

+#define        reg     register
+

 #include <sys/types.h>
 #ifdef UNIX
 
 #include <sys/types.h>
 #ifdef UNIX
 


@@ -12,7 +16,8 @@
 #  include <a.out.h>
 #  include <stab.h>
 #else not FLEXNAMES
 #  include <a.out.h>
 #  include <stab.h>
 #else not FLEXNAMES

-#  include <olda.out.h>
+#  define ONLIST
+#  include "a.out.h"

 #  include <stab.h>
 #endif FLEXNAMES
 
 #  include <stab.h>
 #endif FLEXNAMES
 


@@ -35,27 +40,54 @@
 #define        NHASH           1103    /* hash table is dynamically extended */
 #define        TNAMESIZE       32      /* maximum length of temporary file names */
 #define        NLOC            4       /* number of location ctrs */
 #define        NHASH           1103    /* hash table is dynamically extended */
 #define        TNAMESIZE       32      /* maximum length of temporary file names */
 #define        NLOC            4       /* number of location ctrs */

-
+/*
+ *     Sizes for character buffers.
+ *     what                    size #define name       comments
+ *
+ *     source file reads       ASINBUFSIZ              integral of BUFSIZ
+ *     string assembly         NCPString               large for .stabs
+ *     name assembly           NCPName                 depends on FLEXNAMES
+ *     string save             STRPOOLDALLOP   
+ *
+ *
+ *     -source file reads should be integral of BUFSIZ for efficient reads
+ *     -string saving is a simple first fit
+ */
+#ifndef ASINBUFSIZ
+#      define  ASINBUFSIZ      4096
+#endif not ASINBUFSIZ
+#ifndef STRPOOLDALLOP
+#      define STRPOOLDALLOP    8192
+#endif not STRPOOLDALLOP
+#ifndef NCPString
+#      define  NCPString       4080
+#endif not NCPString
+
+#define        NCPName NCPS

 #ifdef UNIX
 #ifdef UNIX

-# ifndef       FLEXNAMES
-#      ifndef  NCPS
-#              define  NCPS    8       /* number of characters per symbol*/
-#      endif
-# else
-#      ifdef NCPS
-#              undef   NCPS
-#      endif
-#      define  NCPS    BUFSIZ  /* needed to allocate yytext */
-# endif
+# ifndef FLEXNAMES
+#      ifndef NCPS
+#              undef   NCPName
+#              define  NCPName 8
+#      endif not NCPS
+# else FLEXNAMES
+#      ifndef NCPS
+#              undef   NCPName
+#              define  NCPName 4096
+#      endif not NCPS
+# endif FLEXNAMES

 # endif UNIX
 
 # ifdef VMS
 # endif UNIX
 
 # ifdef VMS

-# ifdef NCPS
-#      undef   NCPS
-# endif NCPS
-#      define  NCPS    15
+#      define  NCPName 15

 # endif VMS
 
 # endif VMS
 

+/*
+ *     Check sizes, and compiler error if sizes botch
+ */
+#if ((STRPOOLDALLOP < NCPString) || (STRPOOLDALLOP < NCPName))
+       $$$botch with definition sizes
+#endif test botches

 /*
  * Symbol types
  */
 /*
  * Symbol types
  */


@@ -87,35 +119,18 @@
 #define        AIMM    7       /* $ expr */
 #define        ASTAR   8       /* * */
 #define        AINDX   16      /* [%r] */
 #define        AIMM    7       /* $ expr */
 #define        ASTAR   8       /* * */
 #define        AINDX   16      /* [%r] */

-

 /*
 /*

- * Argument access types used to test validity of operands to operators
+ *     Definitions for the things found in ``instrs''

  */
  */

-#define        ACCR    (1<<3)                          /* read */
-#define        ACCW    (2<<3)                          /* write */
-#define        ACCB    (4<<3)                          /* branch displacement */
-#define        ACCA    (8<<3)                          /* address only */
-#define        ACCM    (ACCR | ACCW)                   /* modify */
-#define        ACCI    (ACCB | ACCR)                   /* XFC code */
-
-#define ACCESSMASK     (ACCA | ACCR | ACCW | ACCB)     /* the mask */
+#define        INSTTAB 1
+#include "instrs.h"

 
 /*
 
 /*

- *     Argument data types
- *     Also used to tell outrel what it is relocating
- *     (possibly in combination with RELOC_PCREL and TYPNONE)
+ *     Tells outrel what it is relocating
+ *     RELOC_PCREL is an implicit argument to outrel; it is or'ed in
+ *     with a TYPX

  */
  */

-#define        TYPB            0       /* byte */
-#define        TYPW            1       /* word */
-#define        TYPL            2       /* long */
-#define        TYPQ            3       /* quad */
-#define        TYPF            4       /* floating */
-#define        TYPD            5       /* double floating */
-#define        TYPNONE         6       /* when nothing */
-#define        RELOC_PCREL     8       /* implicit argument to outrel; ==> PCREL */
-
-#define        TYPMASK 7
-
+#define        RELOC_PCREL     (1<<TYPLG)

 /*
  *     reference types for loader
  */
 /*
  *     reference types for loader
  */


@@ -124,25 +139,25 @@
 #define        LEN2    4
 #define        LEN4    6
 #define        LEN8    8
 #define        LEN2    4
 #define        LEN4    6
 #define        LEN8    8

+#define        LEN16   10

 
 extern int     reflen[];       /* {LEN*+PCREL} ==> number of bytes */
 extern int     lgreflen[];     /* {LEN*+PCREL} ==> lg number of bytes */
 
 extern int     reflen[];       /* {LEN*+PCREL} ==> number of bytes */
 extern int     lgreflen[];     /* {LEN*+PCREL} ==> lg number of bytes */

-extern int     len124[];       /* {1,2,4,8} ==> {LEN1, LEN2, LEN4, LEN8} */
-extern char    mod124[];       /* {1,2,4,8} ==> {bits to construct operands */
-extern int     type_124[];     /* {1,2,4,8} ==> {TYPB, TYPW, TYPL, TYPQ} */
-extern int     ty_NORELOC[];   /* {TYPB..TYPD} ==> {1 if relocation not OK */
-extern int     ty_LEN[];       /* {TYPB..TYPD} ==> {LEN1..LEN8} */
-extern int     ty_nbyte[];     /* {TYPB..TYPD} ==> {1,2,4,8} */
-extern int     ty_nlg[];       /* {TYPB..TYPD} ==> lg{1,2,4,8} */
+extern int     len124[];       /* {1,2,4,8,16} ==> {LEN1, LEN2, LEN4, LEN8} */
+extern char    mod124[];       /* {1,2,4,8,16} ==> {bits to construct operands */
+extern int     type_124[];     /* {1,2,4,8,16} ==> {TYPB,TYPW,TYPL,TYPQ,TYPO} */
+extern int     ty_NORELOC[];   /* {TYPB..TYPH} ==> {1 if relocation not OK */
+extern int     ty_float[];     /* {TYPB..TYPH} ==> {1 if floating number */
+extern int     ty_LEN[];       /* {TYPB..TYPH} ==> {LEN1..LEN16} */
+extern int     ty_nbyte[];     /* {TYPB..TYPH} ==> {1,2,4,8,16} */
+extern int     ty_nlg[];       /* {TYPB..TYPH} ==> lg{1,2,4,8,16} */
+extern char    *ty_string[];   /* {TYPB..TYPH} ==> printable */

 
 #define        TMPC    7       
 
 #define        TMPC    7       

-#define        HW      01
-#define        FW      03
-#define        DW      07
-
-#ifdef UNIX
-#  include <pagsiz.h>
-#endif UNIX
+#define        HW      0x1
+#define        FW      0x3
+#define        DW      0x7
+#define        OW      0xF

 
 #ifdef VMS
 #  define PAGRND       0x1FFL
 
 #ifdef VMS
 #  define PAGRND       0x1FFL


@@ -247,7 +262,10 @@ struct symtab{
 struct instab{
        struct  nlist   s_nm;           /* instruction name, type (opcode) */
        u_char  s_tag;                  
 struct instab{
        struct  nlist   s_nm;           /* instruction name, type (opcode) */
        u_char  s_tag;                  

+       u_char  s_eopcode;
+       char    s_pad[2];               /* round to 20 bytes */

 };
 };

+typedef        struct  instab  *Iptr;

 /*
  *     The fields nm.n_desc and nm.n_value total 6 bytes; this is
  *     just enough for the 6 bytes describing the argument types.
 /*
  *     The fields nm.n_desc and nm.n_value total 6 bytes; this is
  *     just enough for the 6 bytes describing the argument types.


@@ -255,25 +273,74 @@ struct    instab{
  *     they are allocated adjacently.
  *     IF THE FORMAT OF STRUCT nlist CHANGES, THESE MAY HAVE TO BE CHANGED.
  *
  *     they are allocated adjacently.
  *     IF THE FORMAT OF STRUCT nlist CHANGES, THESE MAY HAVE TO BE CHANGED.
  *

- *     Instab is cleverly declared to look very much the combination of
+ *     Instab is cleverly declared to look very much like the combination of

  *     a struct symtab and a struct nlist.
  */
  *     a struct symtab and a struct nlist.
  */

+/*
+ *     With the 1981 VAX architecture reference manual,
+ *     DEC defined and named two byte opcodes. 
+ *     In addition, DEC defined four new one byte instructions for
+ *     queue manipulation.
+ *     The assembler was patched in 1982 to reflect this change.
+ *
+ *     The two byte opcodes are preceded with an escape byte
+ *     (usually an ESCD) and an opcode byte.
+ *     For one byte opcodes, the opcode is called the primary opcode.
+ *     For two byte opcodes, the second opcode is called the primary opcode.
+ *
+ *     We store the primary opcode in I_popcode,
+ *     and the escape opcode in I_eopcode.
+ *
+ *     For one byte opcodes in the basic arhitecture,
+ *             I_eopcode is CORE
+ *     For one byte opcodes in the new architecture definition,
+ *             I_eopcode is NEW
+ *     For the two byte opcodes, I_eopcode is the escape byte.
+ *
+ *     The assembler checks if a NEW or two byte opcode is used,
+ *     and issues a warning diagnostic.
+ */
+/*
+ *     For upward compatability reasons, we can't have the two opcodes
+ *     forming an operator specifier byte(s) be physically adjacent
+ *     in the instruction table.
+ *     We define a structure and a constructor that is used in
+ *     the instruction generator.
+ */
+struct Opcode{
+       u_char  Op_eopcode;
+       u_char  Op_popcode;
+};
+
+#define        BADPOINT        0xAAAAAAAA
+/*
+ *     See if a structured opcode is bad
+ */
+#define        ITABCHECK(o)    ((itab[o.Op_eopcode] != (Iptr*)BADPOINT) && (itab[o.Op_eopcode][o.Op_popcode] != (Iptr)BADPOINT))
+/*
+ *     Index the itab by a structured opcode
+ */
+#define        ITABFETCH(o)    itab[o.Op_eopcode][o.Op_popcode]
+

 struct Instab{
 #ifdef FLEXNAMES
        char    *I_name;
 #else not FLEXNAMES
 struct Instab{
 #ifdef FLEXNAMES
        char    *I_name;
 #else not FLEXNAMES

-       char    I_name[NCPS];
+       char    I_name[NCPName];

 #endif
 #endif

-       u_char  I_opcode;
+       u_char  I_popcode;              /* basic op code */

        char    I_nargs;
        char    I_args[6];
        u_char  I_s_tag;
        char    I_nargs;
        char    I_args[6];
        u_char  I_s_tag;

+       u_char  I_eopcode;
+       char    I_pad[2];               /* round to 20 bytes */

 };
 /*
  *     Redefinitions of fields in the struct nlist for instructions so that
  *     one saves typing, and conforms to the old naming conventions
  */
 };
 /*
  *     Redefinitions of fields in the struct nlist for instructions so that
  *     one saves typing, and conforms to the old naming conventions
  */

-#define        i_opcode        s_nm.n_type     /* use the same field as symtab.type */
+#define        i_popcode       s_nm.n_type     /* use the same field as symtab.type */
+#define        i_eopcode       s_eopcode

 #define        i_nargs         s_nm.n_other    /* number of arguments */
 #define        fetcharg(ptr, n) ((struct Instab *)ptr)->I_args[n]
 
 #define        i_nargs         s_nm.n_other    /* number of arguments */
 #define        fetcharg(ptr, n) ((struct Instab *)ptr)->I_args[n]
 


@@ -284,53 +351,36 @@ struct    arg {                           /*one argument to an instruction*/
        char    a_dispsize;             /*usually d124, unless have B^, etc*/
        struct  exp *a_xp;
 };
        char    a_dispsize;             /*usually d124, unless have B^, etc*/
        struct  exp *a_xp;
 };

-
+/*
+ *     Definitions for numbers and expressions.
+ */
+#include "asnumber.h"

 struct exp {
 struct exp {

-       long    e_xvalue;               /* MUST be the first field (look at union Double) */
-       long    e_yvalue;               /* MUST be second field; least sig word of a double */
+       Bignum  e_number;       /* 128 bits of #, plus tag */

        char    e_xtype;
        char    e_xloc;
        char    e_xtype;
        char    e_xloc;

-       struct  symtab *e_xname;
+       struct  symtab          *e_xname;

 };
 };

+#define        e_xvalue        e_number.num_num.numIl_int.Il_long

 
 

-#define doub_MSW e_xvalue
-#define doub_LSW e_yvalue
+#define                MINLIT          0
+#define                MAXLIT          63

 
 

-union  Double {
-       struct{
-               long    doub_MSW;
-               long    doub_LSW;
-       } dis_dvalue;
-       double  dvalue;
-};
-
-struct Quad {
-       long    quad_low_long;
-       long    quad_high_long;
-};
+#define                MINBYTE         -128
+#define                MAXBYTE         127
+#define                MINUBYTE        0
+#define                MAXUBYTE        255

 
 

-/*
- *     Magic layout macros
- */
-#define        MINBYTE -128
-#define                MAXBYTE 127
-#define                MINWORD -32768
-#define                MAXWORD 32767
+#define                MINWORD         -32768
+#define                MAXWORD         32767
+#define                MINUWORD        0
+#define                MAXUWORD        65535

 
 

-#define                LITFLTMASK 0x000043F0   /*really magic*/
-/*
- *             Is the floating point double word in xp a
- *             short literal floating point number?
- */
-#define        slitflt(xp) \
-                       (    (xp->doub_LSW == 0) \
-                        &&  ( (xp->doub_MSW & LITFLTMASK) \
-                             == xp->doub_MSW) )
-/*
- *     If it is a slitflt, then extract the 6 interesting bits
- */
-#define                extlitflt(xp) \
-                       xp->doub_MSW >> 4
+#define                ISLIT(x)        (((x) >= MINLIT) && ((x) <= MAXLIT))
+#define                ISBYTE(x)       (((x) >= MINBYTE) && ((x) <= MAXBYTE))
+#define                ISUBYTE(x)      (((x) >= MINUBYTE) && ((x) <= MAXUBYTE))
+#define                ISWORD(x)       (((x) >= MINWORD) && ((x) <= MAXWORD))
+#define                ISUWORD(x)      (((x) >= MINUWORD) && ((x) <= MAXUWORD))

 
        extern  struct  arg     arglist[NARG];  /*building operands in instructions*/
        extern  struct  exp     explist[NEXP];  /*building up a list of expressions*/
 
        extern  struct  arg     arglist[NARG];  /*building operands in instructions*/
        extern  struct  exp     explist[NEXP];  /*building up a list of expressions*/


@@ -383,7 +433,7 @@ struct      Quad {
         *      The lexical analyzer builds up symbols in yytext.  Lookup
         *      expects its argument in this buffer
         */
         *      The lexical analyzer builds up symbols in yytext.  Lookup
         *      expects its argument in this buffer
         */

-       extern  char    yytext[NCPS+2];         /* text buffer for lexical */
+       extern  char    yytext[NCPName+2];      /* text buffer for lexical */

        /*
         *      Variables to manage the input assembler source file
         */
        /*
         *      Variables to manage the input assembler source file
         */


@@ -394,13 +444,17 @@ struct    Quad {
 
        extern  int     passno;                 /* 1 or 2 */
 
 
        extern  int     passno;                 /* 1 or 2 */
 

-       extern  int     anyerrs;                /*errors assembling arguments*/
+       extern  int     anyerrs;                /*errors as'ing arguments*/
+       extern  int     anywarnings;            /*warnings as'ing arguments*/

        extern  int     silent;                 /*don't mention the errors*/
        extern  int     savelabels;             /*save labels in a.out*/
        extern  int     orgwarn;                /* questionable origin ? */
        extern  int     useVM;                  /*use virtual memory temp file*/
        extern  int     jxxxJUMP;               /*use jmp instead of brw for jxxx */
        extern  int     readonlydata;           /*initialized data into text space*/
        extern  int     silent;                 /*don't mention the errors*/
        extern  int     savelabels;             /*save labels in a.out*/
        extern  int     orgwarn;                /* questionable origin ? */
        extern  int     useVM;                  /*use virtual memory temp file*/
        extern  int     jxxxJUMP;               /*use jmp instead of brw for jxxx */
        extern  int     readonlydata;           /*initialized data into text space*/

+       extern  int     nGHnumbers;             /* GH numbers used */
+       extern  int     nGHopcodes;             /* GH opcodes used */
+       extern  int     nnewopcodes;            /* new opcodes used */

 #ifdef DEBUG
        extern  int     debug;
        extern  int     toktrace;
 #ifdef DEBUG
        extern  int     debug;
        extern  int     toktrace;


@@ -408,7 +462,7 @@ struct      Quad {
        /*
         *      Information about the instructions
         */
        /*
         *      Information about the instructions
         */

-       extern  struct  instab  *itab[NINST];   /*maps opcodes to instructions*/
+       extern  struct  instab  **itab[NINST];  /*maps opcodes to instructions*/

        extern  readonly struct Instab instab[];
 
        extern  int     curlen;                 /*current literal storage size*/
        extern  readonly struct Instab instab[];
 
        extern  int     curlen;                 /*current literal storage size*/


@@ -417,10 +471,21 @@ struct    Quad {
        struct  symtab  **lookup();             /*argument in yytext*/
        struct  symtab  *symalloc();
 
        struct  symtab  **lookup();             /*argument in yytext*/
        struct  symtab  *symalloc();
 

+       char    *Calloc();
+       char    *ClearCalloc();
+

 #define outb(val) {dotp->e_xvalue++; if (passno==2) bputc((val), (txtfil));}
 
 #define outs(cp, lg) dotp->e_xvalue += (lg); if (passno == 2) bwrite((cp), (lg), (txtfil))
 
 #define outb(val) {dotp->e_xvalue++; if (passno==2) bputc((val), (txtfil));}
 
 #define outs(cp, lg) dotp->e_xvalue += (lg); if (passno == 2) bwrite((cp), (lg), (txtfil))
 

+#ifdef UNIX
+#define        Outb(o) outb(o)
+#endif UNIX
+
+#ifdef VMS
+#define        Outb(o) {*vms_obj_ptr++=-1;*vms_obj_ptr++=(char)o;dotp->e_xvalue+=1;}
+#endif VMS
+

 /*
  *     Most of the time, the argument to flushfield is a power of two constant,
  *     the calculations involving it can be optimized to shifts.
 /*
  *     Most of the time, the argument to flushfield is a power of two constant,
  *     the calculations involving it can be optimized to shifts.