Club Amiga de Montreal - CAM/CAM_CD_1.iso/files/529b.lha/DICE_v2.06.29/version.doc

Text File | 1991-07-03 | 15.2 KB | 411 lines

                   VERSION.DOC
                  DICE

VERS DES COMMENT
    VERS    = Release Version
    DES     = bug fixed / feature designator
    XB  - major bug fixed in main compiler
          (use of routine in question could have caused a crash)
    B   - minor bug fixed in main compiler
    F   - feature added
    E   - enhancement to existing feature
    O   - optimization added

    ADD - feature added or fixed that is standard C but was not previously
          implemented or working.

    XBL - major bug fixed to library
    BL  - minor bug fixed to library
    FL  - feature added to library
    OL  - optimization added to library

    XBA - major bug fixed in support program (i.e. not DCC or sub programs)
    BA  - minor bug fixed in support program
    FA  - feature added to support program (or new support program)
    OA  - optimization added to support program

    COMMENT = comment or bug, feature

2.06.30
    B    another floating point bug found in && and || of the
    form 'fp && fp' or 'fp || fp', would cause incorrect
    evaluation and/or assembly error

    B    small bug in fread() would sometimes set error flag
    when returning EOF, and fseek() would not reset this
    flag (it does now).

    BL    bug in *scanf(), %c would overwrite the char by one byte
    (i.e. store into two chars instead of one).  fixed.

    B    DCPP didn't handle a quoted /* in directives correctly.

2.06.29
    B    another long standing bug found: short a = i * j; where i and j
    are long's and *also* a memory reference (not in regs),
    the multiplication short-result optimization was screwed up.

    B    register allocation bug (would produce a fatal error) fixed,
    registers would not be deallocated in constant conditional
    expressions such as:    1 ? (a = 4) : b;

2.06.28
    B    really dumb bug fixed, made retroactive to 2.06.27 (all 2.06.27
    dists were redone with this fixed).  Had been introduced in 2.06.27

2.06.27
    E    add -// option to DCC and DCPP, enables C++ style // comments.
    If not specified, // style comments are ignored.  Generally
    one puts -// in DCCOPTS.

    E    added -no-env option for DCC.  If specified, DCC will *not*
    load options from DCCOPTS.

    B    fixed bug:  static int fio(), fio();  (procedure declared twice
    on same line) would force procedure to be non-static.

    fixed bug:  __geta4 int fio(), bar(); ... __geta4 would apply
    only to first procedure.

    B    fixed bug w/ labels ...  label: case ...  would generate error
    message (case or default following directly after label).  Was
    introduced when I initially fixed labels.

    E    AUTO-AGGREGATE INITIALIZATION ADDED, e.g.
    main() { int a[] = { 1, 2, 3 }; ... }.

    static & global initialization has been re-vamped.  Note that
    bit-field aggregate initialization is NOT supported yet.

    B    Fixed bug that has been in there from the beginning.
    int *a; a[20000] = 1; ... would not multiply the constant by 4 to
    get the index.    ONLY EFFECTED CONSTANT INDEXES WHOS OFFSET WOULD BE
    LARGER THAN A SIGNED SHORT, which is why it was not caught.

    B    Fixed bug in float point stack allocation... temporary fp variables
    from the previous procedure would not properly be cleared from the
    cache, causing erronous stack offsets (that overlap other variables)
    in the next procedure.

    E    Added ANSI 'U' extension for constants, e.g. 123U.  DICE now
    automatically promotes a constant to unsigned if it does not fit in
    a signed long, such as 4000000000.  Note, however, the int->float
    conversion is currently always signed due to lack of
    unsigned->float calls in the amiga's shared fp libraries.

    B    small bug in fread(), would not set the EOF flag when an EOF
    occurs for an fread() requesting a buffer size larger than the
    stdio buffer size.

    B    when making a registered-args call (-mr, -mR, -mRR) where a
    pointer - int subtraction occurs, i.e. foo(ptr - int, int),
    arguments after the argument containing the ptr - int would
    be incorrect (registers would get squashed).  ONLY applies
    to registered-args calls.  This has been fixed!

    B    bug in preprocessor fixed, #define fubar(x) "a x a" would replace
    the 'x' in the string, which is wrong.

    B    bug with bitfields has been found and fixed.  Essentially, bitfield
    operations in routines that need to run a retry pass can get
    munged.  This is usually caused by routines that declare lots of
    local variables.

2.06.26
    B    Fixed bug in floating pt compare of the form:  x = (f1 == f2);
    i.e. a compare where the result is a boolean 0/1 when not in
    a conditional.    Was caught by DICE (caused a fatal error).

    B    Fixed bug w/ bitfields (was caught by DICE), would give fatal
    error if destination was not a register for field extraction.

    B    fixed bugs with stringtize operator in macros, should now work
    according to the ANSI spec.

    #define fubar(x) #x

    BL    month was off by one for %m operator in strftime()

     E    PROCEDURES MAY NOW RETURN STRUCTURES.  YOU MUST PROTOTYPE ALL SUCH
    PROCEDURES.

     E    added // comments to DCPP (C++ style comments)

2.06.25
    E    doc/errors.doc now exists, error handling centralized.

    E    a printer driver and exec device driver example has been added to
    examples/ ... so now I have a shared library example, dos device
    driver example, EXEC device driver and printer driver example.

2.06.24
    B    stack allocation changes in 2.06.23 were broken, broke floating point.
    (got the stack tracking mixed up w/ variable allocation)

    B    ?: fix in 2.06.23 was broken (sigh), fixed ... 'default:' would
    not be properly tokenized.

    E    *scanf() now supports %e/E/f/g/G and %[..]

2.06.23 BETA
    B    goto labels are now in their own name space, no more conflicts
    with  int a; ... goto a; ... a: ...

    F    added stack tracking for fp temporaries, meaning that subroutines
    containing floating point expressions do not take up anywhere near
    the amount of stack they used to.

    F    allows declarations after switch() { and before first case.

    F    fixed problem with  ... ? symbol : ...    (symbol was being
    interpreted as a label instead of a variable within a ?:
    conditional

    F    fixed problems with conditional returns from fp operations,
    such as:    double a, b; int c = (a < b);  that must
    generate a 0/1 result instead of a branch (as in an if()).
    Would generate error before.

2.06.22
    B    fixed problem with GOTO labels, a goto label semantically is
    not a statement unto itself.  The problem is a line like the
    below:

        if (i) j = 1; else x: j = 2;

    Currently j = 2; is completely outside the if in DICE.    This
    is incorrect,  'x: j = 2;' counts as a single statement.

    E    libmake is now documented, it wasn't before!  New options have
    been added to libmake and fdtolib.  For libmake, DCC's -D
    option has been added.    For fdtolib, a new -p option is specifiable
    to set the prefix used on exported symbols (to support creation
    of dynamic.library compatible object modules)

    B    fixed bug in string constant array initialization,
    char x[1] = "a";  previously generated an error

    B    fixed infinite ERROR printing loop

    F    revamped constant-address handling (i.e. when you map a
    complex structure over IO space at a known address, useful when
    generating ROM'd apps for 68000 based uP's.

    F    dynamic.library & support routines now part of the distribution.

2.06.21
    E    fixed register reallocation, should now do a better job
    allocating registers in complex subroutines.  Hopefully squashed
    'maximum retries exceeded' error for all but the most incredibly
    complex expressions.

    B    fixed bug in int->float conversion, expressions such as:
        double x = (double)(a * b);

    E    fixed somestuff that generated an infinite WARN loop.

    F    DCC now creates the destination directory heirarchy if it does
    not exist.  For example, when you DCC com/x.c the object file
    will be T:com/x.o, with T:com created if necessary.

    F    DYNAMIC FUNCTION/VAR LIBARARY SUPPORT ADDED, see __dynamic
    explanation in DYNAMIC.DOC .

    F    DCPP now accepts -Ddefine(vars..)=definition, it used to be
    able to only accept -Ddefine=value

2.06.20
    F    TimerBase, for timer.device library calls, now has auto-open
    capability, meaning that you can simply call AddTime(), CmpTime(),
    SubTime(), and the new 2.0 calls (GetSysTime() & ReadEClock())
    without having to open the timer.device and set up TimerBase
    yourself.

    B    bug in if (ptr & 1) and similar constructs doing a logical and
    in a compare against a pointer rather than an int produced
    bad code caught by DAS.

    B    x.o was in c.lib, this is wrong... x.o must be the LAST file in
    any link and is included automatically by DCC when it runs DLINK.

    F    additional example code in DCC2:examples -- a DOS handler and
    a shared library.

2.06.19
    B    bug in dynamic stack code under 1.3 fixed
    B    bug in workbench startup under 1.3 fixed
    B    bug in register allocation fixed (would cause fatal error
    message 'too many retries' sometimes when procedure args
    declared as arrays instead of pointers)

2.06.18
    F    several more libraries have auto-open capability

    B    bug in DLINK fixed -- would GURU on large links due to an error
    in the allocation routines (relocation info larger than 4K would
    cause a GURU)

2.06.17
    F    DCPP now scans DINCLUDE:PD/ for include files.    This is where I
    will be putting .H files for various ports (such as the UNIX
    regexp port).  This was done so as not to clutter the main
    DINCLUDE: and to differentiate between PD files and non-PD
    files.

    UNIX compatible .H files are usually placed in DINCLUDE: or
    DINCLUDE:SYS/

    F    preprocessor now handles #if defined(symbol) properly (was
    previously not implemented)

    F    BITFIELDS now 99% implemented!    including signed/unsigned
    qualifications.  The only thing that does not work is ++bitfield
    and --bitfield.  Single-bit bitfields have been optimized.
    aggregate initialization of bitfields is still wanting.  executable
    actually got smaller when I finally got down and fixed these up.
    No 020/030 support yet.

    F    startup code modified to allow writes to desc 0, reads from desc 1,
    etc...    at the file descriptor level but not the stdio level.  This
    is to support some UNIX programs which do this.

    BL    bug in [f]putc() fixed -- [f]putc() is supposed to return the put character,
            but did not do so in the case of a new line (putc), or
            at all (fputc).

    F    NEW LIBRARY ROUTINESE:    stat(), fstat(), getenv(), opendir(),
    readdir(), closedir(), rewinddir() (see MAN/UNIX.DOC)

    F    chdir() now restores the original directory on exit

    F    Dynamic Stacking added (-gs option).  Somewhat primitive, but will
    get much better.  This allows subroutines to be as deeply nested as
    required, allocating and deallocating stack frames when low stack
    conditions exist.

    F    longjmp()/setjmp() now properly handle dynamic stacks

    B    fixed another bug, this one having to do with the index address
    mode (An,Dn.x) combined with a binary operator.

    B    fixed bug in FDTOLIB that screwed up register ordering.

2.06.16
    B    fixed EXG bug in DAS, EXG As,Ad would generate Ds,Dd.. screwed
    up registered args (-mRR).

    B    fixed bug in *= and /= combined w/ array indexing, things like
    temp[i] /= 23; would use the scratch regs for storage across
    the divide call.

2.06.15
    F    BASIC REGISTERED ARGUMENTS ADDED.  See -mr, -mR, and -mRR options

    F    prototype optimization.  If a prototype says a procedure takes a
    short, then DICE pushes a long (as usual).  However, DICE will
    no longer EXT the object before pushing it (upper word is garbage).
    This works because the procedure, having declared the argument a
    short, will only access the lower 16 bits.

    B    fixed token pasting bug in dcpp, a ## b ## c now works properly.

    F    first registered distribution that includes the 2.0 includes,
    restructuring of 1.3 includes (now called 'amiga13' instead of
    'amiga'), and restructuring of disks to make more space.

2.05.14
    BL    fgets() would overflow the buffer by one character when input lines
    were larger than the buffer size.

    B    DCC would complain about output (-o) files ending in .h or .c when
    they do not actually end in .h or .c ..

2.05.13
    B    DCC was supplying only a 2K stack to NON-RESIDENTED sub programs.
    Oops.

    F    New floating point support for MATHIEEESING*.LIBRARY ... single
    precision IEEE library.  This is now the default since it is
    more compatible with the double precision IEEE library for
    conversions between single & double precision.

    Use the -ffp option to DCC to use the old motorola fast floating
    point single precision library.  Note that the new ieee single
    precision library may not exist on every computer.

2.05.12
    B    another bug with 'const static' items not properly aligning the
    routine they were declared in (when declared within a procedure
    definition).  Fixed.

    B    pfmt has a local 64 byte buffer which used to be static.  This is
    illegal for the ROM.LIB version of sprintf() & vsprintf() and so I
    have made this an auto instead.  This fix does not effect Amiga C
    programming though it does mean that [v]sprintf() may now be called
    out of context or multi-threaded without mishap.

    F    qsort(), rand(), and srand() have been written.

    B    volatile was not being handled proper, 'volatile char *ptr' is
    a pointer to a volatile char, NOT a volatile pointer, for
    example.

2.05.11
    F    new library, ROM.LIB, contains only those routines from C.LIB that
    are completely self contained (reference no static or global data,
    or other routines.  Use only autos if at all).

    This library is included instead of C.LIB when the -rom option
    to DCC is used (with the -rom option, amigas*.lib is not included
    either, and it is up to the programmer to specify his own startup
    module)

    F    char ary[0] and empty structs return errors, but a direct 'void'
    declaration is allowed.  i.e. 'void x;', useful in some cases.

    F    Specifying the 'register' keyword now adds some 'weight' to the
    variable, perhaps giving it more of a chance of becomming a
    register.

    B    DCPP was improperly handling token pasting (##), this has been
    fixed.

    B    static const objects declared within a procedure not word-aligned
    could cause the procedure code to not be word-aligned, thus
    causing a software error.

    F    CONST object handling has been changed.  Before 2.05.11 const
    objects were not put into a CODE hunk unless the -ms or -mS options
    are given to DCC.  2.05.11 and beyond put const qualified objects
    in a code hunk regardless.

    F    C.O Modified.  Any program run in the background with RUN will not
    attempt to Open("*",..) to get the stderr channel but instead
    will use the stdout descriptor if it exists.  This allows programs
    to be detached from a CLI (i.e. that you can run a program and
    then close the CLI window without mishap)

    F    -020, -030, -881, -882 options formally added (currently -020/-030
    are the same and -881/-882 are the same)

    -020: uses EXTB.L   (no major support has been added yet)

    B    DSEARCH had a bug... when multiple files are scanned it would miss
    lines in the second file and beyond!

    F    oops, const items in the library were not placed in the code
    section.  This effects <ctype.h> ... you must recompile any
    source files that use <ctype.h> macros since the access method
    is now pc-relative instead of data-relative.

    The fix is more pertainent to ROMd applications that use <ctype.h>
    ... the lookup tables are no longer copied into RAM for such
    applications.

2.05.10
    F    __config and __shared type qualifiers added

    B    --var; generated an internal error