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Diff of /sml/trunk/HISTORY

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revision 1127, Fri Mar 8 01:35:33 2002 UTC revision 1506, Thu Jun 17 22:19:15 2004 UTC
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13  Description:  Description:
14    
15  ----------------------------------------------------------------------  ----------------------------------------------------------------------
16    Name: Matthias Blume (blume (at) tti - c (dot) org)
17    Date: 2004/06/17 17:20:00 CDT
18    Tag: blume-20040617-timer-unix
19    Description:
20    
21    Changed the interface of structures Timer and Unix to match the most
22    recent Basis spec.
23    
24    In the case of Unix there still seems to be an open/weird issue:
25    
26       The {text,bin}{In,Out}streamOf functions are supposed to create
27       fresh streams whenever they are called -- as opposed to have them
28       return the same stream every time.  This design is supposed to
29       prevent space leaks caused by proc values hanging on to streams.
30    
31       The reap function, on the other hand, is supposed to close the
32       streams.  This cannot be done without having a handle on the
33       stream in proc after all...
34    
35    I took the liberty to implement the following stopgap solution:
36    
37      The proc value hangs on to the most recently created stream(s).
38      Reap closes those.  If either or both of the two streams hadn't
39      been created at all yet, then reap will close the corresponding
40      file descriptors directly.
41    
42    PS: I don't understand the original space leak argument anymore.  If
43    a proc hangs on to the imperative stream, then I/O operations on those
44    will advance the state of the cached stream and avoid the space leak.
45    
46    ----------------------------------------------------------------------
47    Name: Matthias Blume (blume (at) tti - c (dot) org)
48    Date: 2004/05/28 16:45:00 CDT
49    Tag: blume-20040528-basis
50    Description:
51    
52    Added signature PACK_REAL and exported functor PrimIO.
53    
54    ----------------------------------------------------------------------
55    Name: Matthias Blume (blume (at) tti - c (dot) org)
56    Date: 2004/05/25 16:00:00 CDT
57    Tag: blume-20040525-group-owner
58    Description:
59    
60    CM now ignores (but still accepts) the "owner" information in group
61    descriptions.  The owner of a group is its next enclosing
62    library. Each group must have a unique owner.  (There is a virtual
63    "toplevel" library that owns groups which are not nested within a real
64    library.)  Previously, each group had to explicitly declare its owner,
65    and CM would check that such a declaration is correct.  The new scheme
66    is to have CM check that for each group there is precisely one owning
67    library.
68    
69    The advantage of the new scheme is that the programmer no longer needs
70    to maintain the somewhat annoying owner information.  The downside is
71    that CM cannot enforce the ownership rule across multiple runs of
72    CM.make.  Fortunately, enclosing the same group in two different
73    libraries A and B which are not part of the same program does not
74    cause real problems.
75    
76    ----------------------------------------------------------------------
77    Name: Matthias Blume (blume (at) tti - c (dot) org)
78    Date: 2004/05/20 16:00:00 CDT
79    Tag: blume-20040520-win32
80    Description:
81    
82    Made the win32 version work again.  (Strangely, a misplaced comma had
83    slipped into win32-process.c which prevented the runtime from being
84    compiled correctly.)
85    
86    Also, included a minor addition to ml-build.bat analogous to what was
87    done in blume-20040519-ml-build.
88    
89    ----------------------------------------------------------------------
90    Name: Matthias Blume (blume (at) tti - c (dot) org)
91    Date: 2004/05/19 22:10:00 CDT
92    Tag: blume-20040519-ml-build
93    Description:
94    
95    Arranged for ml-build to clean up after itself a little bit better.
96    The script generates a temporary SML source file and compiles it using
97    CM, so CM generates metadata (GUID, SKEL, objectfile) for it.  It now
98    gets rid of those at the end, so they don't accumulate under .cm.
99    
100    This required a minor change to install.sh because the name of the
101    metadata directory (default: .cm) is actually configurable at
102    installation time.
103    
104    ----------------------------------------------------------------------
105    Name: Matthias Blume (blume (at) tti - c (dot) org)
106    Date: 2004/05/18 15:50:00 CDT
107    Tag: blume-20040518-mkreader
108    Description:
109    
110    Added Posix.IO.mk{Bin,Text}{Reader,Writer} by lifting their respective
111    implementations from internal modules PosixBinPrimIO and PosixTextPrimIO.
112    
113    ----------------------------------------------------------------------
114    Name: Matthias Blume (blume (at) tti - c (dot) org)
115    Date: 2004/05/11 14:35:00 CDT
116    Tag: blume-20040511-win32sock
117    Description:
118    
119    Added previously missing support for many socket-related functions
120    under win32.  Thanks to David Hansel <hansel@reactive-systems.com>
121    for the voluminous patch!
122    
123    (I have not tested this patch under win32 yet.)
124    
125    Here is David's e-mail:
126    
127    Hi,
128    
129    Attached to this email you find a diff against sml/nj 110.45
130    that will enable socket support under Windows.
131    
132    To apply the patch (using unix or cygwin)
133    1) gunzip runtime.diff.gz
134    2) "cd" into "src/runtime" in the source tree of a fresh
135       110.45 installation.
136    3) patch -p 1 < [your/path/to]runtime.diff
137    
138    The code compiles fine but has NOT yet been extensively tested.
139    I only ran a few tests for basic socket client functionality
140    (which worked fine).  Especially the functions that use ioctl
141    are not tested at all and might not work (see below).
142    
143    I implemented this since we want to move to a newer version of sml/nj
144    but need socket support in order to use it.  This is the first time I
145    even had a look at the sml/nj source,  so please review my changes
146    before making this part of the distribution!  Here are a few issues
147    that I think might be better for someone to solve who is more
148    familiar with the sml/nj source (and socket programming):
149    
150    - getnetbyaddr.c and getnetbyname.c will raise a "not implemented"
151      exception since I could not figure out what the windows equivalent
152      of these functions is
153    
154    - In sockets-osdep.h there are a some #include statements that are
155      only used in a few files that include sockets-osdep.h
156    
157    - In smlnj-sock-lib.c, function init_fn() calls WSAStartup() but
158      does not process its return value since I don't know how to
159      report an error upwards.
160    
161    - It would probably be good to have a call to WSACleanup() when
162      the library is unloaded (if there is such a possibility).
163      Otherwise I think Windows will take care of this automatically
164      when the process finishes.
165    
166    - I used ioctlsocket() as a replacement for ioctl() but I have
167      no idea if that is actually the proper replacement on Windows.
168    
169    - All these issues are marked in the code by "FIXME" comments.
170    
171    We use sml/nj extensively in our products and are quite happy
172    with it.  I hope this contribution will help you.
173    
174    Keep up the good work!
175    
176    David
177    
178    ----------------------------------------------------------------------
179    Name: Matthias Blume (blume (at) tti - c (dot) org)
180    Date: 2004/05/11 14:20:00 CDT
181    Tag: blume-20040511-installml
182    Description:
183    
184    Fixed two bugs in installml script.  (Thanks to Vesa A. Norrman for
185    the patch.)
186    
187    ----------------------------------------------------------------------
188    Name: Matthias Blume (blume (at) tti - c (dot) org)
189    Date: 2004/05/11 14:05:00 CDT
190    Tag: blume-20040511-nlffi-netbsd
191    Description:
192    
193    Added support for nlffi under netbsd.  (Thanks to Vesa A. Norrman for
194    the patch.)
195    
196    ----------------------------------------------------------------------
197    Name: Matthias Blume (blume (at) tti - c (dot) org)
198    Date: 2004/05/11 12:05:00 CDT
199    Tag: blume-20040511-exports
200    Description:
201    
202    As per request by Adam Chlipala <adam@hcoop.net>, extended various
203    export lists in compiler-related .cm-files.
204    
205    ----------------------------------------------------------------------
206    Name: Matthias Blume (blume (at) tti - c (dot) org)
207    Date: 2004/05/11 11:35:00 CDT
208    Tag: blume-20040511-allsource
209    Description:
210    
211    The installer now honors the "src-smlnj" target again, although its meaning
212    has changed from "all sources required for the compiler" to "all sources
213    the installer knows about".  In other words, if you enable "src-smlnj"
214    in the "targets" file, then the installer will pull in sources for
215    everything.  (Notice that this refers to source code only.  Compiled
216    code is still only installed for modules that were requested explicitly
217    or which are required for other modules that were requested explicitly.)
218    
219    ----------------------------------------------------------------------
220    Name: Matthias Blume (blume (at) tti - c (dot) org)
221    Date: 2004/04/23 17:40:00 CDT
222    Tag: blume-20040423-ieee-scan
223    Description:
224    
225    Fixed IEEEReal.scan (and .fromString) so that if there is an overflow
226    in the exponent calculation we get INF or ZERO (depending on the mantissa
227    and the sign of the exponent).
228    
229    ----------------------------------------------------------------------
230    Name: Matthias Blume (blume (at) tti - c (dot) org)
231    Date: 2004/04/23 10:40:00 CDT
232    Tag: blume-20040423-ml-build
233    Description:
234    
235    The ml-build script now terminates with a non-0 status when something
236    goes wrong.
237    
238    ----------------------------------------------------------------------
239    Name: Matthias Blume (blume (at) tti - c (dot) org)
240    Date: 2004/04/22 16:35:00 CDT
241    Tag: blume-20040422-Option
242    Description:
243    
244    Made exception Option to be the same as exception Option.Option
245    (as it should be).
246    
247    ----------------------------------------------------------------------
248    Name: Allen Leung (leunga (at) reservoir (dot) com)
249    Date: 2004/03/19 14:40:00 EST
250    Tag: leunga-20040319-cygwin-nlffi
251    Description:
252    
253    Fixed the runtime so that ml-nlffi-lib runs on the cygwin version
254    of SML/NJ.  The problem is that
255    
256       lib = dlopen(NULL, ...)
257       f   = dlsym(lib, "malloc");
258    
259    does not work on Windows unless we explicitly export symbols
260    such as 'malloc' during linking.  We fixed this by explicitly
261    exporting the required symbols with the magic gcc incantation:
262    
263        -Wl,--export-all cygwin.def
264    
265    where cygwin.def is a file containing all the symbols that
266    we wish to export.
267    
268    I suspect this is a Windows problem and we'll have to
269    do the same (somehow with windows compilers) when
270    we build the native win32 version with the system
271    calls LoadLibrary/GetProcAddress.
272    
273    ----------------------------------------------------------------------
274    Name: Matthias Blume (blume (at) tti - c (dot) org)
275    Date: 2004/03/04 16:35:00 CST
276    Tag: blume-20040304-intinf-fmt
277    Description:
278    
279    Fixed problem with IntInf.fmt (sign would show up on the right instead
280    of on the left for BIN, OCT, and HEX).
281    
282    ----------------------------------------------------------------------
283    Name: Matthias Blume (blume (at) tti - c (dot) org)
284    Date: 2004/03/04 11:25:00 CST
285    Tag: blume-20040304-symlinks
286    Description:
287    
288    Fixed problem with installer script (unix only) where bin/ml-yacc and
289    friends pointed (via symlinks) to absolute locations instead of just
290    .run-sml.  This was reported by Vesa A Norrman.
291    
292    ----------------------------------------------------------------------
293    Name: Matthias Blume (blume (at) tti - c (dot) org)
294    Date: 2004/02/13 14:50:00 CST
295    Tag: Release_110_45
296    Description:
297    
298    New working version (110.45). New bootfiles.
299    
300    ----------------------------------------------------------------------
301    Name: Matthias Blume (blume (at) tti - c (dot) org)
302    Date: 2004/01/26 15:15:15 CST
303    Tag: blume-20040126-toplevel
304    Description:
305    
306    Improved handling of exceptions at the interactive toplevel.
307    
308    ----------------------------------------------------------------------
309    Name: Matthias Blume (blume (at) tti - c (dot) org)
310    Date: 2004/01/26 11:25:00
311    Tag: blume-20040126-app
312    Description:
313    
314    Type of top-level "app" corrected.
315    Added code for setting vp_limitPtrMask to Win32-specific runtime.
316    
317    ----------------------------------------------------------------------
318    Name: Matthias Blume (blume (at) tti - c (dot) org)
319    Date: 2003/11/18 17:10 CST
320    Tag: blume-20031118-basis-fiddle
321    Description:
322    
323    - changed Timer interface to what might become the spec
324    - POSIX_FLAGS -> BIT_FLAGS according to spec
325    - some other minor discrepancies wrt. spec eliminated
326    
327    ----------------------------------------------------------------------
328    Name: Matthias Blume (blume (at) tti - c (dot) org)
329    Date: 2003/11/06 12:00:00 CST
330    Tag: Release_110_44
331    Description:
332    
333    New working version (110.44). New bootfiles.
334    
335    ----------------------------------------------------------------------
336    Name: Matthias Blume (blume (at) tti - c (dot) org)
337    Date: 2003/11/04 11:50:00 CST
338    Tag: blume-20031104-move-libraries
339    Description:
340    
341    Eliminated the "dont_move_libraries" directive in config/targets.
342    (The mechanism was broken and could not be fixed easily.  Moreover,
343    there does not seem to be any reason not to move all libraries into
344    lib during installation.  I originally implemented this directive as a
345    backward-compatibility feature when I first introduced the new CM.
346    Now that things have been stable for a long time and going back to the
347    old CM is not an option, there is no reason to keep it around.)
348    
349    ----------------------------------------------------------------------
350    Name: Matthias Blume (blume (at) tti - c (dot) org)
351    Date: 2003/11/03 16:00:00 CST
352    Tag: blume-20031103-installdir
353    Description:
354    
355    Made installer honor INSTALLDIR variable again.  (Thanks to Chris
356    Richards for pointing out the problem and providing the solution.)
357    
358    ----------------------------------------------------------------------
359    Name: Matthias Blume (blume (at) tti - c (dot) org)
360    Date: 2003/10/01 17:05:00 CDT
361    Tag: blume-20031001-lal-mlrisc
362    Description:
363    
364    MLRISC bug fix from Lal.
365    
366    ----------------------------------------------------------------------
367    Name: Matthias Blume (blume (at) tti - c (dot) org)
368    Date: 2003/09/30 16:10:00 CDT
369    Tag: blume-20030930-primio-bat
370    Description:
371    
372    1. Added openVector, nullRd, and nullWr to PRIM_IO.
373    2. Improved .bat files (for Win32 port) to make things work under Win95.
374       (thanks to Aaron S. Hawley for this one)
375    
376    ----------------------------------------------------------------------
377    Name: Matthias Blume (blume (at) tti - c (dot) org)
378    Date: 2003/09/26 16:05:00 CDT
379    Tag: blume-20030926-wrappriv
380    Description:
381    
382    Added missing wrapper for privilege "primitive" in $smlnj/viscomp/core.cm.
383    
384    ----------------------------------------------------------------------
385    Name: Matthias Blume (blume (at) tti - c (dot) org)
386    Date: 2003/09/26 15:00:00 CDT
387    Tag: blume-20030926-110_43_3
388    Description:
389    
390    - additional cleanup
391    - version number bump, NEW BOOTFILES
392    
393    ----------------------------------------------------------------------
394    Name: Matthias Blume (blume (at) tti - c (dot) org)
395    Date: 2003/09/26 12:00:00 CDT
396    Tag: blume-20030926-ppautoload
397    Description:
398    
399    I modified the read-eval-print loop so that the autoloader gets
400    invoked whenever the prettyprinter tries to look up a symbol that
401    is not currently defined in the toplevel environment but which
402    appears in CM's autoload registry.  As a result, we see far fewer of
403    those ?.Foo.Bar.xxx names in the prettyprinter's output.
404    
405    In addition to this I tried to clean up some pieces of the Basis
406    implementation (e.g., Socket, Word8Array) in order to prevent other
407    instances of these ?.Foo.Bar.xxx names from being printed.
408    
409    The mechanism that picks names for types still needs some work, though.
410    (Right now it seems that if there is a type A.t which is defined to
411    be B.u, but B is unavailable at toplevel, then A.t gets printed as
412    "?.B.u" although the perhaps more sensible solution would be to use
413    "A.t" in this case.  In other words, the prettyprinter should follow
414    a chain of DEFtycs not farther than there are corresponding toplevel
415    names in the current environment.)
416    
417    ----------------------------------------------------------------------
418    Name: Matthias Blume (blume (at) tti - c (dot) org)
419    Date: 2003/09/24 16:31:00 CDT
420    Tag: blume-20030924-installer
421    Description:
422    
423    Another installer tweak:  All the ML code for the installer is now
424    compiled during CMB.make and put into a little library called
425    $smlnj/installer.cm.  The installation then simply invokes
426    
427       sml -m $smlnj/installer.cm
428    
429    and everything happens automagically.
430    
431    Win32:  ML code senses value of environment variable SMLNJ_HOME.
432    Unix:   ML code senses values of environment variables ROOT, CONFIGDIR,
433            and BINDIR.
434    
435    The new scheme guarantees that the ML code responsible for the installation
436    is in sync with the APIs of the main system.  Also, the installer is
437    somewhat faster because the installer script is precompiled.
438    
439    ----------------------------------------------------------------------
440    Name: Matthias Blume (blume (at) tti - c (dot) org)
441    Date: 2003/09/24 15:35:00 CDT
442    Tag: blume-20030924-synsock
443    Description:
444    
445    Added a signature SYNCHRONOUS_SOCKET to basis.cm.  This is like SOCKET
446    but excludes all non-blocking operations.  Defined SOCKET (in Basis)
447    and CML_SOCKET in terms of SYNCHRONOUS_SOCKET.  Removed superfluous
448    implementations of non-blocking operations from CML's Socket
449    structure.
450    
451    ----------------------------------------------------------------------
452    Name: Matthias Blume (blume (at) tti - c (dot) org)
453    Date: 2003/09/24 15:10:05 CDT
454    Tag: blume-20030924-sockets
455    Description:
456    
457    1. Fixed SOCKET API and implementation to match Basis spec.
458       This required changing the internal representation of sockets to one
459       that remembers (for each socket file descriptor) whether it is currently
460       blocking or non-blocking.  This state is maintained lazily (i.e., a system
461       call is made only if the state actually needs to change).
462    
463    2. OS-specific details of sockets were moved into separate files, thus
464       making it possible to unify the bulk of the socket implementations
465       between Unix and Win32.
466    
467    3. CML's socket API changed accordingly.
468       (Note that we need to remove non-blocking functions from this API
469       since they are redundant in the case of CML!)
470    
471    4. CML's socket implementation now makes use of non-blocking functions
472       provided by Basis, thus removing all OS-dependent code from this part
473       of CML.
474    
475    5. Changed Real64.precision from 52 to 53.  Minor cleanup in Real64 code.
476    
477    ----------------------------------------------------------------------
478    Name: Matthias Blume (blume (at) tti - c (dot) org)
479    Date: 2003/09/22 12:10:00 CDT
480    Tag: blume-20030922-110_43_2
481    Description:
482    
483    Made a new interim version and bootfiles for developer's bootstrapping
484    convenience.
485    
486       110.43.2 -- NEW BOOTFILES
487    
488    ----------------------------------------------------------------------
489    Name: Matthias Blume (blume (at) tti - c (dot) org)
490    Date: 2003/09/19 15:55:00 CDT
491    Tag: blume-20030919-cmdir
492    Description:
493    
494    1. new-install.sh -> install.sh
495    2. changed default CM "metadata" directory name to ".cm" (instead of "CM")
496    3. tweaked installer so that another name instead of .cm can be chosen
497       at install time (by setting the CM_DIR_ARC environment variable
498       during installation); once installation is complete, the name is
499       fixed
500    
501    ----------------------------------------------------------------------
502    Name: Matthias Blume (blume (at) tti - c (dot) org)
503    Date: 2003/09/18 16:00:00 CDT
504    Tag: blume-20030918-110_43_1
505    Description:
506    
507    Made a new interim version and bootfiles for developer's bootstrapping
508    convenience.
509    
510       110.43.1 -- NEW BOOTFILES
511    
512    ----------------------------------------------------------------------
513    Name: Matthias Blume (blume (at) tti - c (dot) org)
514    Date: 2003/09/18 15:20:00 CDT
515    Tag: blume-20030918-misc
516    Description:
517    
518    1. Exported fractionsPerSecond etc. from TimeImp (but not from Time as
519       this seems to be controversial at the moment) and used those in
520       Posix.ProcEnv.times.
521    
522    2. Added Time.{from,to}Nanoseconds to Time.
523    
524    3. Improved Real.{from,to}LargeInt by avoiding needless calculations.
525       For example, fromLargeInt never needs to look at more than 3 "big
526       digits" to get its 53 bits of precision.
527    
528    ----------------------------------------------------------------------
529    Name: Matthias Blume (blume (at) tti - c (dot) org)
530    Date: 2003/09/17 16:30:00 CDT
531    Tag: blume-20030917-real32-slices
532    Description:
533    
534    Added an entry to the primitive environment
535    (compiler/Semant/statenv/prim.sml) for int32->real64 conversion and
536    added code to compiler/CodeGen/main/mlriscGen.sml to implement it.
537    
538    Removed some of the "magic" constants in real64.sml and replaced them
539    with code that generates these values from their corresponding
540    integer counterparts.
541    
542    Made all(?) the slice-related changes to the Basis and made everything
543    compile again...
544    
545    ----------------------------------------------------------------------
546    Name: Matthias Blume (blume (at) tti - c (dot) org)
547    Date: 2003/09/15 17:45:00 CDT
548    Tag: blume-20030915-rbase
549    Description:
550    
551    Fixed bug in Real.fromLargeInt.
552    
553    ----------------------------------------------------------------------
554    Name: Matthias Blume (blume (at) tti - c (dot) org)
555    Date: 2003/09/13 18:11:00 CDT
556    Tag: blume-20030913-libinstall
557    Description:
558    
559    Minor bugfix in config/libinstall (set anchor with path to
560    standalone tool after installing it, otherwise libraries that
561    need ml-lex or ml-yacc won't compile the first time the installer
562    runs).
563    
564    ----------------------------------------------------------------------
565    Name: Matthias Blume (blume (at) tti - c (dot) org)
566    Date: 2003/09/12 11:45:00 CDT
567    Tag: blume-20030912-various
568    Description:
569    
570     - fixed bug in Real.toLargeInt
571     - fixed bug in Posix.ProcEnv.times
572     - changed inputLine functions to return an option
573     - minor installer improvements / bugfixes
574     - changed default @SMLalloc parameter for x86/celeron to 64k
575    
576    ----------------------------------------------------------------------
577    Name: Matthias Blume (blume (at) tti - c (dot) org)
578    Date: 2003/09/09 22:00:00 CDT
579    Tag: Release_110_43
580    Description:
581    
582        New working release 110.43.  New bootfiles.
583    
584    ----------------------------------------------------------------------
585    Name: Matthias Blume (blume (at) tti - c (dot) org)
586    Date: 2003/09/09 19:20:00 CDT
587    Tag: blume-20030909-installer
588    Description:
589    
590    Rewrote large parts of config/install.sh in SML (config/libinstall.sml).
591    Modified config/install.bat to take advantage of it.  Also modified
592    config/install.sh (and called it config/new-install.sh) to take advantage
593    of it on Unix systems.  (The SML code is (supposed to be) platform-
594    independent.)
595    
596    The installer can now install everything under Win32
597    as well as under *nix as long as it compiles.
598    
599    Other changes:
600    
601      - made CML compile again under Win32
602      - made eXene compile under Win32 (by providing a fake structure UnixSock
603        and by using OS.Process.getEnv instead of Posix.ProcEnv.getenv)
604      - fixed a bug in nowhere: it assumed that type OS.Process.status is the
605        same as type int;  under Win32 it isn't
606      - fixed some slice-related problems in the win32-specific parts of CML
607      - added a functor argument "sameVol" to os-path-fn.sml in the Basis
608        (under Win32, the volume name is case-insensitive, and the
609        OS.Path code compares volume names for equality)
610    
611    ----------------------------------------------------------------------
612    Name: Matthias Blume (blume (at) tti - c (dot) org)
613    Date: 2003/09/08 11:55:00 CDT
614    Tag: blume-20030908-fullpath
615    Description:
616    
617    Made Win32 version of OS.FileSys.fullPath return current directory
618    when given an empty string.  This is what the spec says, and incidentally,
619    CM depends on it.  (CM otherwise goes into an infinite loop in certain
620    cases when presented with the name of a non-existing .cm file.)
621    
622    ----------------------------------------------------------------------
623    Name: Matthias Blume (blume (at) tti - c (dot) org)
624    Date: 2003/09/04 16:30:00 CDT
625    Tag: blume-20030905-slices-etc
626    Description:
627    
628      1. Changed interface to vectors and arrays in Basis to match
629         (draft) Basis spec.
630      2. Added signatures and implementations of slices according to
631         Basis spec.
632      3. Edited source code throughout the system to make it compile again
633         under 1. and 2.  (In some cases code had to be added to have it
634         match the new signatures.)
635      4. MLRISC should be backward-compatible: the copies of the originals
636         of files that needed to change under 3. were retained, the .cm files
637         check the compiler version number and use old versions when
638         appropriate.
639      5. Changed type of OS.FileSys.readDir and Posix.FileSys.readdir to
640         dirstream -> string option (in accordance with Basis spec).
641      6. When generating code that counts lines, ml-lex used function
642         CharVector.foldli, taking advantage of its old interface.
643         This has been replaced with the corresponding code from
644         CharVectorSlice.  (html-lex must be re-lexed!)
645      7. BitArray in smlnj-lib/Util has been extended/modified to match the
646         new MONO_ARRAY signature.  (Do we need BitArraySlice?)
647      8. Removed temporary additions (fromInternal, toInternal) from the
648         (now obsolete) IntInf in smlnj-lib/Util.
649      9. Cleaned up structure Byte.
650     10. Added localOffset, scan, and fromString to Date (according to spec).
651         Cleaned/corrected implementation of Date.
652         (Still need to check for correctness; implement better canonicalizeDate.)
653     11. Added "scan" to signature IEEE_REAL.
654     12. Some improvements to IntInf [in particular: efficiency-hack for
655         mod and rem when second operand is 2 (for parity checks).]
656     13. Changed representation of type Time.time, using a single IntInf.int
657         value counting microseconds.  This considerably simplified the
658         implementation of structure Time.  We now support negative time
659         values; scan and fromString handle signs.
660     14. Functor PrimIO now takes two additional arguments (VectorSlice and
661         ArraySlice).
662    
663    ----------------------------------------------------------------------
664    Name: Matthias Blume (blume (at) tti - c (dot) org)
665    Date: 2003/08/28 17:00:00 CDT
666    Tag: blume-20030828-intinf
667    Description:
668    
669    This is a major update which comes with a version number bump
670    (110.42.99 -- yes, we are really close to 110.43 :-), NEW BOOTFILES,
671    and an implementation of IntInf in the Basis.
672    
673    There are a fairly large number of related changes and updates throughout
674    the system:
675    
676    Basis:
677            - Implemented IntInf.
678            - Made LargeInt a projection of IntInf (by filtering through INTEGER).
679            - Added some missing Real64 operations, most notably Real.toLargeInt.
680            - Added FixedInt as a synonym for Int32.
681    
682    compiler:
683            * Added support for a built-in intinf type.
684              - literals
685              - pattern matching
686              - conversion shortcuts (Int32.fromLarge o Int.toLarge etc.)
687              - overloading on literals and operations
688    
689            This required adding a primitive type intinf, some additional
690            primops, and implementations for several non-trivial intinf
691            operations in Core.  (The intinf type is completely abstract
692            to the compiler; all operations get delegated back to the Core.)
693    
694            * Intinf equality is handled by polyequal.  However, the compiler
695            does not print its usual warning in this case (since polyequal
696            is the right thing to do there).
697    
698            * Improved the organization of structure InlineT.
699    
700            * A word about conversion primops:
701            If conversions involving intinf do not cancel out during
702            CPS contract, then the compiler must insert calls to Core functions.
703            Since all core access must be resolved already during the FLINT
704            translate phase, it would be too late a the time of CPS contract
705            to add new Core calls.  For this reason, conversion primops
706            for intinf carry two arguments:  1. the numeric argument that
707            they are supposed to convert, and 2. the Core function that
708            can help with this conversion if necessary.  If CPS contract
709            eliminates a primop, then the associated Core function becomes
710            dead and goes away.  Intinf conversion primops that do not get
711            eliminated by CPS contract get rewritten into calls of their
712            core functions by a separate, new phase.
713    
714    interactive system:
715            - Control.Print.intinfDepth controls max length of intinf constants
716            being printed. (Analogous to Control.Print.stringDepth.)
717            - Cleanup in printutil and pputil: got rid of unused stuff and
718            duplicates; replaced some of the code with code that makes better
719            use of library functionality.
720    
721    CM:
722            Bugfix: parse-errors in init group (system/smlnj/init/init.cmi)
723            are no longer silent.
724    
725    CKIT:
726            Fixed mismatched uses of Int32 and LargeInt.  I always decided
727            in favor of LargeInt -- which is now the same as IntInf.
728            CKIT-knowledgable people should check whether this is what's
729            intended and otherwise change things back to using Int32 or
730            FixedInt.
731    
732    Throughout the code:
733            Started using IntInf.int literals and built-in operations
734            (e.g., comparison with 0) where this seems appropriate.
735    
736    
737    ----------------------------------------------------------------------
738    Name: Dave MacQueen (dbm@cs.uchicago.edu)
739    Date: 2003/08/13 11:36:00 CDT
740    Tag: dbm-20030813-mcz-merge1
741    Description:
742    
743    Merging changes from the mcz-branch development branch into trunk.
744    These changes involve replacement of the emulated old prettyprinter
745    interface with direct use of the SML/NJ Lib PP library, and fixing
746    of a couple of bugs (895, 1186) relating to error messages.  A new
747    prettyprinter for ast datatypes (Elaborator/print/ppast.{sig,sml})
748    has been added.
749    
750    ----------------------------------------------------------------------
751    Name: Matthias Blume (blume (at) tti - c (dot) org)
752    Date: 2003/08/11 15:45:00 CDT
753    Tag: blume-20030811-windows
754    Description:
755    
756    Version number bumped to 110.42.9.  NEW BOOTFILES!!!
757    
758        http://smlnj.cs.uchicago.edu/dist/working/110.42.9/
759    
760    This patch restores SML/NJ's ability to run under win32.  There are a
761    number of changes, including fixes for several bugs that had gone
762    unnoticed until now:
763    
764      - uname "CYGWIN_NT*" is recognized as win32 (This is relevant only when
765        trying to run the win32 version from within cygwin.)
766    
767      - There are a number of simple .bat scripts that substitute for their
768        corresponding Unix shell-scripts.  (See below.)
769    
770      - The internals of ml-build have been modified slightly.  The main
771        difference is that instead of calling ".link-sml" (or link-sml.bat)
772        using OS.Process.system, the ML process delegates this task back
773        to the script.  Otherwise problems arise in mixed environments such
774        as Cygwin where scripts look and work like Unix scripts, but
775        where OS.Process.system cannot run them.
776    
777      - In CM, the srcpath pickler used native pathname syntax -- which
778        is incorrect in the case of cross-compilation.  The new pickle format
779        is independent of platform-specific naming conventions.
780    
781      - Path configuration files (such as lib/pathconfig) can now choose
782        between native and standard syntax.  Placing a line of the form
783    
784            standard!
785    
786        into the file causes all subsequent paths to be interpreted using
787        CM standard pathname syntax (= Unix conventions); a line
788    
789            native!
790    
791        switches back to native style.  This was needed so that
792        path config files can be written portably, see src/system/pathconfig.
793    
794      - Runtime system:
795    
796          - win32-filesys.c:  get_file_time and set_file_time now
797            access modification time, not creation time.
798    
799          - I/O code made aware of new array representation.
800    
801          - Bug fixes in X86.prim.masm.
802    
803       - src/system/makeml made aware of win32. (For use under cygwin
804            and other Unix-environments for windows.)
805    
806       - In Basis, fixed off-by-one error in win32-io.sml (function vecF)
807         which caused BinIO.inputAll to fail consistently.
808    
809    .bat scripts:
810    
811       Windows .bat scripts assume that SMLNJ_HOME is defined.
812    
813       - sml.bat, ml-yacc.bat, ml-lex.bat:  Driver scripts for standalone
814         applications (sml, ml-yacc, ml-lex).
815       - ml-build.bat: analogous to ml-build.
816       - config\install.bat:  Analogous to config/install.sh.  This requires
817         that SMLNJ_HOME is set and that Microsoft Visual C is ready to use.
818         (nmake etc. must be on the path, and vcvars32 must have been run.)
819         Moreover, sources for ml-lex and ml-yacc need to exist under src,
820         and the bootfile hierarchy must have been unpacked under
821         sml.boot.x86-win32.
822         The script is very primitive and does a poor job at error checking.
823         It only installs the base system, ml-lex, and ml-yacc.  No other
824         libraries are being installed (i.e., you get only those that
825         are part of the compiler.)
826       - link-sml.bat:  analogous to .link-sml, but not currently used
827    
828    Unrelated bug fixes:
829    
830      - ml-nlffigen now exports structures ST_* corresponding to incomplete
831        types.
832      - Added getDevice to PP/src/pp-debug-fn.sml.  (Would not compile
833        otherwise.)
834    
835    ----------------------------------------------------------------------
836    Name: Dave MacQueen (macqueen@cs.uchicago.edu)
837    Date: 2003/06/17
838    Tag: macqueen-20030617-bug895
839    Description:
840    
841    Modified compiler/Elaborator/print/pptype.sml to fix bug 895.
842    Tag will be used for new development branch (mcz-branch) for
843    use by MacQueen, (Lucasz) Zairek, and (George) Cao at uchicago.
844    
845    ----------------------------------------------------------------------
846    Name: Matthias Blume (blume (at) tti - c (dot) org)
847    Date: 2003/05/27 16:55:00 CDT
848    Tag: blume-20030527-polyeq
849    Description:
850    
851    Tried to eliminated most cases of polymorphic equality.
852    
853    ----------------------------------------------------------------------
854    Name: Matthias Blume (blume (at) tti - c (dot) org)
855    Date: 2003/05/21 17:45:00 CDT
856    Tag: blume-20030517-complete
857    Description:
858    
859    Two changes:
860    
861      1. Added a flag for controlling whether non-exhaustive bindings will
862         be treated as errors (default is false).
863      2. Cleaned up the *entire* source tree so that CMB.make goes through
864         without a single non-exhaustive match- or bind warning.
865    
866    ----------------------------------------------------------------------
867    Name: Matthias Blume (blume (at) tti - c (dot) org)
868    Date: 2003/05/17 10:20:00 CDT
869    Tag: blume-20030517-absyn
870    Description:
871    
872    1. Added cases for IF, WHILE, ANDALSO, and ORELSE to Absyn.
873    
874       This mainly affects the quality of error messages.  However, some
875       of the code is now more straightforward than before. (Treatment of
876       the above four constructs in translate.sml is much simpler than
877       the "macro-expansion" that was going on before.  Plus, the mach-
878       compiler no longer gets invoked just to be able to compile an
879       if-expression.)
880    
881    2. The ErrorMsg.Error exception is now caught and absorbed by the
882       interactive loop.
883    
884    ----------------------------------------------------------------------
885    Name: Allen Leung
886    Date: 2003/05/16 13:05:00 CDT
887    Tag: leunga-20030516-cygwin-runtime
888    Description:
889    
890        Ported the runtime system to cygwin, which uses the unix
891    x86-unix bin files.  Missing/buggy features:
892    
893       o getnetbyname, getnetbyaddr: these functions seem to be missing in
894         the Cygwin library.
895       o Ctrl-C handling may be flaky.
896       o Windows system calls and Windows I/O are not supported.
897    
898       A new set of binfiles is located at:
899    
900         http://www.dorsai.org/~leunga/boot.x86-unix.tgz
901    
902       This is only needed for bootstrapping the cygwin version of smlnj.
903       Other x86 versions can use the existing binfiles.
904    
905    ----------------------------------------------------------------------
906    Name: Matthias Blume
907    Date: 2003/04/08 15:42:00 CDT
908    Tag: blume-20030408-listpair
909    Description:
910    
911    1. Added a target 'mlrisc' to installer.
912    
913    2. Added missing elements to structure ListPair.
914    
915    ----------------------------------------------------------------------
916    Name: Allen Leung
917    Date: 2003/01/07 10:40:00 EST
918    Tag: leunga-20030107-int-rem
919    Description:
920    
921    Fixed a bug in Int.rem(x,y) where y is a power of 2 on x86.
922    The arguments to the SUBL instruction were swapped.
923    
924    ----------------------------------------------------------------------
925    Name: Matthias Blume
926    Date: 2002/12/12 16:25:00 EST
927    Tag: blume-20021212-risc-ra
928    Description:
929    
930    Fixed a serious bug in the rewrite code for FP spilling/reloading that
931    sent the RA into an infinite loop when floating point registers get
932    spilled.  (Because of this bug, e.g., nucleic stopped compiling between
933    110.37 and 110.38.)
934    There was another set of potential problems related to the handling of
935    MLRISC annotations (but those did not yet cause real problems, apparently).
936    
937    ----------------------------------------------------------------------
938    Name: Matthias Blume
939    Date: 2002/12/06 22:40:00 EST
940    Tag: blume-20021206-cm-fileid
941    Description:
942    
943    Added a call of SrcPath.sync at the beginning of Parse.parse (in CM).
944    This fixes the problem of CM getting confused by files that suddenly
945    change their identity (e.g., by getting unlinked and recreated by some
946    text editor such as vi).  There might be a better/cheaper/cleaner way
947    of doing this, but for now this will have to do.
948    
949    ----------------------------------------------------------------------
950    Name: Matthias Blume
951    Date: 2002/10/28 09:50:00 EST
952    Tag: blume-20021028-typecheck
953    Description:
954    
955    Exported structure Typecheck from $smlnj/viscomp/core.cm.
956    
957    ----------------------------------------------------------------------
958    Name: Matthias Blume
959    Date: 2002/10/17 09:10:00 EDT
960    Tag: Release_110_42
961    Description:
962    
963    In good old tradition, there has been a slight hiccup so that we have
964    to patch 110.42 after the fact.   The old release tag has been replaced
965    (see below).
966    
967    The change solves a problem with two competing approaches the
968    configuration problem regarding MacOS 10.1 vs. MacOS 10.2 which got in
969    each other's way.
970    
971    This change only affects the runtime system code and the installer script.
972    (No new bootfiles.)
973    
974    ----------------------------------------------------------------------
975    Name: Matthias Blume
976    Date: 2002/10/16 12:00:00 EDT
977    Tag: Release_110_42_removed
978    Description:
979    
980    New working release.  New bootfiles.
981    
982    ----------------------------------------------------------------------
983    Name: Matthias Blume
984    Date: 2002/10/10 13:10:00 EDT
985    Tag: blume-20021010-ppc-divs
986    Description:
987    
988    The mltree operator DIVS must be implemented with an overflow check on
989    the PPC because the hardware indicates divide-by-zero using "overflow" as
990    well.
991    
992    ----------------------------------------------------------------------
993    Name: Matthias Blume
994    Date: 2002/07/23 11:45:00
995    Tag: blume-20020723-smlnj-home
996    Description:
997    
998    Sml now senses the SMLNJ_HOME environment variable.  If this is set,
999    then the bin dir is assumed to be in $SMLNJ_HOME/bin and (unless
1000    CM_PATHCONFIG is also set), the path configuration file is assumed
1001    to be in $SMLNJ_HOME/lib/pathconfig.  This way one can easily move
1002    the entire tree to some other place and everything will "just work".
1003    
1004    (Companion commands such as ml-build and ml-makedepend also sense this
1005    variable.)
1006    
1007    ----------------------------------------------------------------------
1008    Name: Matthias Blume
1009    Date: 2002/07/12 21:19:00 EDT
1010    Tag: blume-20020712-liveness
1011    Description:
1012    
1013    Exported two useful "step" functions from liveness module (MLRISC).
1014    
1015    ----------------------------------------------------------------------
1016    Name: Matthias Blume
1017    Date: 2002/07/05 16:00 EDT
1018    Tag: Release_110_41
1019    Description:
1020    
1021    New working release.  New bootfiles.
1022    
1023    ----------------------------------------------------------------------
1024    Name: Matthias Blume
1025    Date: 2002/07/05 10:25:00 EDT
1026    Tag: blume-20020705-btimp
1027    Description:
1028    
1029    Exported structure BTImp from $smlnj/viscomp/debugprof.cm so that
1030    other clients can set up backtracing support.
1031    
1032    ----------------------------------------------------------------------
1033    Name: Matthias Blume
1034    Date: 2002/06/25 17:23:00 EDT
1035    Tag: blume-20020625-fpmax
1036    Description:
1037    
1038    Fixed a bug in translation of INLMAX (and INLMIN) for the floating-point
1039    case.  (The sense of the isNaN test was reversed -- which made min and
1040    max always return their first argument.)
1041    
1042    ----------------------------------------------------------------------
1043    Name: Matthias Blume
1044    Date: 2002/06/11
1045    Tag: blume-20020611-unixpath
1046    Description:
1047    
1048    Back-ported OS.Path.{from,to}UnixPath from idlbasis-devel branch.
1049    
1050    ----------------------------------------------------------------------
1051    Name: Matthias Blume
1052    Date: 2002/06/10 16:35:00 EDT
1053    Tag: blume-20020610-ieeereal
1054    Description:
1055    
1056    I back-ported my implementation of IEEEReal.fromString from the
1057    idlbasis-devel branch so that we can test it.
1058    
1059    Another small change is that ppDec tries to give more information
1060    than just "<sig>" in the case of functors.  However, this code is
1061    broken in some mysterious way if the functor's body's signature
1062    has not been declared by ascription but gets inferred from the
1063    implementation.  This needs fixing...
1064    
1065    ----------------------------------------------------------------------
1066    Name: Matthias Blume
1067    Date: 2002/05/31
1068    Tag: blume-20020531-btrace-mode
1069    Description:
1070    
1071    Resurrected SMLofNJ.Internals.BTrace.mode.  (It accidentally fell by
1072    the wayside when I switched over to using Controls everywhere.)
1073    
1074    ----------------------------------------------------------------------
1075    Name: Lal George
1076    Date: 2002/05/23 12:21:40 EDT
1077    Tag: george-20020523-visual-labels
1078    Description:
1079    
1080    Labels are now displayed in the graphical output to make
1081    the fall-through and target blocks obvious.
1082    
1083    ----------------------------------------------------------------------
1084    Name: Matthias Blume
1085    Date: 2002/05/22 11:03:00 EDT
1086    Tag: blume-20020522-shrink
1087    Description:
1088    
1089    John tweaked yesterday's fix for 1131 to handle an out-of-memory
1090    situation that comes up when allocating huge arrays.
1091    
1092    ----------------------------------------------------------------------
1093    Name: Matthias Blume
1094    Date: 2002/05/21 16:00:00 EDT
1095    Tag: Release_110_40
1096    Description:
1097    
1098    New working release (110.40).  New bootfiles.
1099    
1100    [Also: John Reppy fixed GC bug 1131.]
1101    
1102    ----------------------------------------------------------------------
1103    Name: Matthias Blume
1104    Date: 2002/05/21 12:35:00 EDT
1105    Tag: blume-20020521-cmdoc
1106    Description:
1107    
1108    CM documentation update.
1109    
1110    ----------------------------------------------------------------------
1111    Name: Matthias Blume
1112    Date: 2002/05/21 10:55:00 EDT
1113    Tag: blume-20020521-misc
1114    Description:
1115    
1116    - John tweaked runtime to be silent on heap export (except when
1117      GC messages are on).
1118    - I added a few more things (cross-compiling versions of CMB) to
1119      config/preloads (as suggestions).
1120    
1121    ----------------------------------------------------------------------
1122    Name: Matthias Blume
1123    Date: 2002/05/20 22:25:00 EDT
1124    Tag: blume-20020520-controls
1125    Description:
1126    
1127    - Added ControlUtil structure to control-lib.cm.
1128    - Use it throughout.
1129    - Used Controls facility to define MLRISC controls (as opposed to
1130      registering MLRISC control ref cells with Controls after the fact)
1131    - Fixed messed-up controls priorities.
1132    
1133    * Removed again all the stuff from config/preloads that one wouldn't
1134      be able to preload at the time the initial heap image is built.
1135      (Many libraries, e.g., CML, do not exist yet at this time.  The
1136       only libraries that can be preloaded via config/preloads are those
1137       that come bundled with the bootfiles.)
1138    
1139    ----------------------------------------------------------------------
1140    Name: Matthias Blume
1141    Date: 2002/05/20 10:59:00 EDT
1142    Tag: blume-20020520-preloads
1143    Description:
1144    
1145    Added a lot of commented-out suggestions for things to be included
1146    in config/preloads.
1147    
1148    ----------------------------------------------------------------------
1149    Name: Allen Leung
1150    Date: 2002/05/18 14:20:00 EDT
1151    Tag: leunga-20020518-mdl
1152    Description:
1153    
1154    o Made the mdl tool stuff compile and run again.
1155    o I've disabled all the stuff that depends on RTL specifications; they
1156      are all badly broken anyway.
1157    
1158    ----------------------------------------------------------------------
1159    Name: Matthias Blume
1160    Date: 2002/05/17 16:49:00 EDT
1161    Tag: blume-20020517-controls
1162    Description:
1163    
1164    0. John Reppy made several modifications to the SML/NJ library.
1165       In particular, there is a shiny new controls-lib.cm.
1166    
1167    1. Pushed new controls interface through compiler so that everything
1168       compiles again.
1169    
1170    2. Added FormatComb and FORMAT_COMB to the CML version of the
1171       SML/NJ library (so that CML compiles again).
1172    
1173    3. Modified init scripts because XXX_DEFAULT environment variables
1174       are no longer with us.  (Boot-time initialization is now done
1175       using the same environment variables that are also used for
1176       startup-time initialization of controls.)
1177    
1178    ----------------------------------------------------------------------
1179    Name: Lal George
1180    Date: 2002/05/15 09:20:10 EDT
1181    Tag: george-20020515-pseudo-op-decls
1182    Description:
1183    
1184            All pseudo-ops emitted before the first segment declaration
1185    such as TEXT, DATA, and BSS directives are assumed to be global
1186    declarations and are emitted first in the assembly file. This is
1187    useful in a number of situations where one has pseudo-ops that are not
1188    specific to any segment, and also works around the constraint that one
1189    cannot have client pseudo-ops in the TEXT segment.
1190    
1191            Because no segment is associated with these declarations it is
1192    an error to allocate any space or objects before the first segment
1193    directive and an exception will be raised. However, we cannot make
1194    this check for client pseudo-ops.
1195    
1196            These top level declarations are a field in the CFG graph_info.
1197    In theory you can continue to add to this field after the CFG has been
1198    built -- provided you know what you are doing;-)
1199    
1200    ----------------------------------------------------------------------
1201    Name: Matthias Blume
1202    Date: 2002/05/13 16:40:00 EDT
1203    Tag: blume-20020513-pp-etc
1204    Description:
1205    
1206    A few minor bugfixes:
1207    
1208      - Stopgap measure for bug recently reported by Elsa Gunter (ppDec).
1209        (Bogus printouts for redefined bindings still occur.  Compiler
1210        bug should no longer occur now.  We need to redo the prettyprinter
1211        from scratch.)
1212    
1213      - CM pathname printer now also adds escape sequences for ( and )
1214    
1215      - commend and docu fixes for ml-nlffi
1216    
1217    ----------------------------------------------------------------------
1218    Name: Matthias Blume
1219    Date: 2002/05/10 16:40:00 EDT
1220    Tag: blume-20020510-erg-textio
1221    Description:
1222    
1223    Applied the following bugfix provided by Emden Gansner:
1224    
1225        Output is corrupted when outputSubstr is used rather than output.
1226    
1227        The problem occurs when a substring
1228    
1229            ss = (s, dataStart, dataLen)
1230    
1231        where dataStart > 0, fills a stream buffer with avail bytes left.
1232        avail bytes of s, starting at index dataStart, are copied into the
1233        buffer, the buffer is flushed, and then the remaining dataLen-avail
1234        bytes of ss are copied into the beginning of the buffer. Instead of
1235        starting this copy at index dataStart+avail in s, the current code
1236        starts the copy at index avail.
1237    
1238        Fix:
1239        In text-io-fn.sml, change line 695 from
1240             val needsFlush = copyVec(v, avail, dataLen-avail, buf, 0)
1241        to
1242             val needsFlush = copyVec(v, dataStart+avail, dataLen-avail, buf, 0)
1243    
1244    ----------------------------------------------------------------------
1245    Name: Matthias Blume
1246    Date: 2002/04/12 13:55:00 EDT
1247    Tag: blume-20020412-assyntax
1248    Description:
1249    
1250    1. Grabbed newer assyntax.h from the XFree86 project.
1251    2. Fiddled with how to compile X86.prim.asm without warnings.
1252    3. (Very) Minor cleanup in CM.
1253    
1254    ----------------------------------------------------------------------
1255    Name: Matthias Blume
1256    Date: 2002/04/01 (no joke!) 17:07:00 EST
1257    Tag: blume-20020401-x86div
1258    Description:
1259    
1260    Added full support for div/mod/rem/quot on the x86, using the machine
1261    instruction's two results (without clumsily recomputing the remainder)
1262    directly where appropriate.
1263    
1264    Some more extensive power-of-two support was added to the x86 instruction
1265    selector (avoiding expensive divs, mods, and muls where they can be
1266    replaced with cheaper shifts and masks).  However, this sort of thing
1267    ought to be done earlier, e.g., within the CPS optimizer so that
1268    all architectures benefit from it.
1269    
1270    The compiler compiles to a fixed point, but changes might be somewhat
1271    fragile nevertheless.  Please, report any strange things that you might
1272    see wrt. div/mod/quot/rem...
1273    
1274    ----------------------------------------------------------------------
1275    Name: Matthias Blume
1276    Date: 2002/03/29 17:22:00
1277    Tag: blume-20020329-div
1278    Description:
1279    
1280    Fixed my broken div/mod logic.  Unfortunately, this means that the
1281    inline code for div/mod now has one more comparison than before.
1282    Fast paths (quotient > 0 or remainder = 0) are not affected, though.
1283    The problem was with quotient = 0, because that alone does not tell
1284    us which way the rounding went.  One then has to look at whether
1285    remainder and divisor have the same sign...  :(
1286    
1287    Anyway, I replaced the bootfiles with fresh ones...
1288    
1289    ----------------------------------------------------------------------
1290    Name: Matthias Blume
1291    Date: 2002/03/29 14:10:00 EST
1292    Tag: blume-20020329-inlprims
1293    Description:
1294    
1295    NEW BOOTFILES!!!    Version number bumped to 110.39.3.
1296    
1297    Primops have changed. This means that the bin/boot-file formats have
1298    changed as well.
1299    
1300    To make sure that there is no confusion, I made a new version.
1301    
1302    
1303    CHANGES:
1304    
1305    * removed REMT from mltree (remainder should never overflow).
1306    
1307    * added primops to deal with divisions of all flavors to the frontend
1308    
1309    * handled these primops all the way through so they map to their respective
1310      MLRISC support
1311    
1312    * used these primops in the implementation of Int, Int32, Word, Word32
1313    
1314    * removed INLDIV, INLMOD, and INLREM as they are no longer necessary
1315    
1316    * parameterized INLMIN, INLMAX, and INLABS by a numkind
1317    
1318    * translate.sml now deals with all flavors of INL{MIN,MAX,ABS}, including
1319      floating point
1320    
1321    * used INL{MIN,MAX,ABS} in the implementation of Int, Int32, Word, Word32,
1322      and Real (but Real.abs maps to a separate floating-point-only primop)
1323    
1324    
1325    TODO items:
1326    
1327    * Hacked Alpha32 instruction selection, disabling the selection of REMx
1328      instructions because the machine instruction encoder cannot handle
1329      them.  (Hppa, PPC, and Sparc instruction selection did not handle
1330      REM in the first place, and REM is supported by the x86 machine coder.)
1331    
1332    * Handle DIV and MOD with DIV_TO_NEGINF directly in the x86 instruction
1333      selection phase.  (The two can be streamlined because the hardware
1334      delivers both quotient and remainder at the same time anyway.)
1335    
1336    * Think about what to do with "valOf(Int32.minInt) div ~1" and friends.
1337      (Currently the behavior is inconsistent both across architectures and
1338      wrt. the draft Basis spec.)
1339    
1340    * Word8 should eventually be handled natively, too.
1341    
1342    * There seems to be one serious bug in mltree-gen.sml.  It appears, though,
1343      as if there currently is no execution path that could trigger it in
1344      SML/NJ.  (The assumptions underlying functions arith and promotable do not
1345      hold for things like multiplication and division.)
1346    
1347    ----------------------------------------------------------------------
1348    Name: Matthias Blume
1349    Date: 2002/03/27 16:27:00 EST
1350    Tag: blume-20020327-mlrisc-divisions
1351    Description:
1352    
1353    Added support for all four division operations (ML's div, mod, quot,
1354    and rem) to MLRISC.  In the course of doing so, I also rationalized
1355    the naming (no more annoying switch-around of DIV and QUOT), by
1356    parameterizing the operation by div_rounding_mode (which can be either
1357    DIV_TO_ZERO or DIV_TO_NEGINF).
1358    
1359    The generic MLTreeGen functor takes care of compiling all four
1360    operations down to only round-to-zero div.
1361    
1362    Missing pieces:
1363    
1364      * Doing something smarter than relying on MLTreeGen on architectures
1365        like, e.g., the x86 where hardware division delivers both quotient and
1366        remainder at the same time.  With this, the implementation of the
1367        round-to-neginf operations could be further streamlined.
1368    
1369      * Remove inlining support for div/mod/rem from the frontend and replace it
1370        with primops that get carried through to the backend.  Do this for all
1371        int and word types.
1372    
1373    ----------------------------------------------------------------------
1374    Name: Matthias Blume
1375    Date: 2002/03/25 17:25:00 EST
1376    Tag: blume-20020325-divmod
1377    Description:
1378    
1379    I improved (hopefully without breaking them) the implementation of Int.div,
1380    Int.mod, and Int.rem.   For this, the code in translate.sml now takes
1381    advantage of the following observations:
1382    
1383      Let  q = x quot y      r = x rem y
1384           d = x div  y      m = x mod y
1385    
1386    where "quot" is the round-to-zero version of integer division that
1387    hardware usually provides.  Then we have:
1388    
1389         r = x - q * y        where neither the * nor the - will overflow
1390         d = if q >= 0 orelse x = q * y then q else q - 1
1391                              where neither the * nor the - will overflow
1392         m = if q >= 0 orelse r = 0 then r else r + y
1393                              where the + will not overflow
1394    
1395    This results in substantial simplification of the generated code.
1396    The following table shows the number of CFG nodes and edges generated
1397    for
1398            fun f (x, y) = x OPER y
1399            (* with OPER \in div, mod, quot, rem *)
1400    
1401    
1402        OPER | nodes(old) | edges(old) | nodes(new) | edges(new)
1403        --------------------------------------------------------
1404         div |         24 |         39 |         12 |         16
1405         mod |         41 |         71 |         12 |         16
1406        quot |          8 |         10 |          8 |         10
1407         rem |         10 |         14 |          8 |         10
1408    
1409    
1410    ----------------------------------------------------------------------
1411    Name: Matthias Blume
1412    Date: 2002/03/25 22:06:00 EST
1413    Tag: blume-20020325-cprotobug
1414    Description:
1415    
1416    Fixed a bug in cproto (c prototype decoder).
1417    
1418    ----------------------------------------------------------------------
1419    Name: Matthias Blume
1420    Date: 2002/03/25 16:00:00 EST
1421    Tag: blume-20020325-raw-primops
1422    Description:
1423    
1424    I did some cleanup to Allen's new primop code and
1425    replaced yesterday's bootfiles with new ones.
1426    (But they are stored in the same place.)
1427    
1428    ----------------------------------------------------------------------
1429    Name: Matthias Blume
1430    Date: 2002/03/24 22:40:00 EST
1431    Tag: blume-20020324-bootfiles
1432    Description:
1433    
1434    Made the bootfiles that Allen asked for.
1435    
1436    ----------------------------------------------------------------------
1437    Name: Allen Leung
1438    Date: 2002/03/23 15:50:00 EST
1439    Tag: leunga-20020323-flint-cps-rcc-primops
1440    Description:
1441    
1442      1. Changes to FLINT primops:
1443    
1444        (* make a call to a C-function;
1445         * The primop carries C function prototype information and specifies
1446         * which of its (ML-) arguments are floating point. C prototype
1447         * information is for use by the backend, ML information is for
1448         * use by the CPS converter. *)
1449      | RAW_CCALL of { c_proto: CTypes.c_proto,
1450                       ml_args: ccall_type list,
1451                       ml_res_opt: ccall_type option,
1452                       reentrant : bool
1453                     } option
1454       (* Allocate uninitialized storage on the heap.
1455        * The record is meant to hold short-lived C objects, i.e., they
1456        * are not ML pointers.  With the tag, the representation is
1457        * the same as RECORD with tag tag_raw32 (sz=4), or tag_fblock (sz=8)
1458        *)
1459      | RAW_RECORD of {tag:bool,sz:int}
1460      and ccall_type = CCALL_INT32 | CCALL_REAL64 | CCALL_ML_PTR
1461    
1462      2.  These CPS primops are now overloaded:
1463    
1464           rawload of {kind:numkind}
1465           rawstore of {kind:numkind}
1466    
1467          The one argument form is:
1468    
1469             rawload {kind} address
1470    
1471          The two argument form is:
1472    
1473             rawload {kind} [ml object, byte-offset]
1474    
1475      3. RAW_CCALL/RCC now takes two extra arguments:
1476    
1477         a. The first is whether the C call is reentrant, i.e., whether
1478            ML state should be saved and restored.
1479         b. The second argument is a string argument specifying the name of
1480            library and the C function.
1481    
1482         These things are currently not handled in the code generator, yet.
1483    
1484      4. In CProto,
1485    
1486         An encoding type of "bool" means "ml object" and is mapped into
1487         C prototype of PTR.  Note that "bool" is different than "string",
1488         even though "string" is also mapped into PTR, because "bool"
1489         is assigned an CPS type of BOGt, while "string" is assigned INT32t.
1490    
1491      5. Pickler/unpicker
1492    
1493         Changed to handle RAW_RECORD and newest RAW_CCALL
1494    
1495      6. MLRiscGen,
1496    
1497         1. Changed to handle the new rawload/rawstore/rawrecord operators.
1498         2. Code for handling C Calls has been moved to a new module CPSCCalls,
1499            in the file CodeGen/cpscompile/cps-c-calls.sml
1500    
1501      7. Added the conditional move operator
1502    
1503             condmove of branch
1504    
1505         to cps.  Generation of this is still buggy so it is currently
1506         disabled.
1507    
1508    ----------------------------------------------------------------------
1509    Name: Lal George
1510    Date: 2002/03/22 14:18:25 EST
1511    Tag: george-20020322-cps-branch-prob
1512    Description:
1513    
1514    Implemented the Ball-Larus branch prediction-heuristics, and
1515    incorporated graphical viewers for control flow graphs.
1516    
1517    Ball-Larus Heuristics:
1518    ---------------------
1519    See the file compiler/CodeGen/cpscompile/cpsBranchProb.sml.
1520    
1521    By design it uses the Dempster-Shafer theory for combining
1522    probabilities.  For example, in the function:
1523    
1524        fun f(n,acc) = if n = 0 then acc else f(n-1, n*acc)
1525    
1526    the ball-larus heuristics predicts that the n=0 is unlikely
1527    (OH-heuristic), and the 'then' branch is unlikely because of the
1528    RH-heuristic -- giving the 'then' branch an even lower combined
1529    probability using the Dempster-Shafer theory.
1530    
1531    Finally, John Reppy's loop analysis in MLRISC, further lowers the
1532    probability of the 'then' branch because of the loop in the else
1533    branch.
1534    
1535    
1536    Graphical Viewing:
1537    ------------------
1538    I merely plugged in Allen's graphical viewers into the compiler. The
1539    additional code is not much. At the top level, saying:
1540    
1541            Control.MLRISC.getFlag "cfg-graphical-view" := true;
1542    
1543    will display the graphical view of the control flow graph just before
1544    back-patching.  daVinci must be in your path for this to work. If
1545    daVinci is not available, then the default viewer can be changed
1546    using:
1547    
1548            Control.MLRISC.getString "viewer"
1549    
1550    which can be set to "dot" or "vcg" for the corresponding viewers. Of
1551    course, these viewers must be in your path.
1552    
1553    The above will display the compilation unit at the level of clusters,
1554    many of which are small, boring, and un-interesting. Also setting:
1555    
1556            Control.MLRISC.getInt "cfg-graphical-view_size"
1557    
1558    will display clusters that are larger than the value set by the above.
1559    
1560    
1561    ----------------------------------------------------------------------
1562    Name: Matthias Blume
1563    Date: 2002/03/21 22:20:00 EST
1564    Tag: blume-20020321-kmp-bugfix
1565    Description:
1566    
1567    Changed the interface to the KMP routine in PreString and fixed
1568    a minor bug in one place where it was used.
1569    
1570    ----------------------------------------------------------------------
1571    Name: Allen Leung
1572    Date: 2002/03/21 20:30:00 EST
1573    Tag: leunga-20020321-cfg
1574    Description:
1575    
1576      Fixed a potential problem in cfg edge splitting.
1577    
1578    ----------------------------------------------------------------------
1579    Name: Allen Leung
1580    Date: 2002/03/21 17:15:00 EST
1581    Tag: leunga-20020321-x86-fp-cfg
1582    Description:
1583    
1584      1. Recoded the buggy parts of x86-fp.
1585    
1586         a. All the block reordering code has been removed.
1587            We now depend on the block placement phases to do this work.
1588    
1589         b. Critical edge splitting code has been simplified and moved into the
1590            CFG modules, as where they belong.
1591    
1592         Both of these were quite buggy and complex.  The code is now much, much
1593         simpler.
1594    
1595      2. X86 backend.
1596    
1597         a. Added instructions for 64-bit support.  Instruction selection for
1598            64-bit has not been committed, however, since that
1599            requires changes to MLTREE which haven't been approved by
1600            Lal and John.
1601    
1602         b. Added support for FUCOMI and FUCOMIP when generating code for
1603            PentiumPro and above.  We only generate these instructions in
1604            the fast-fp mode.
1605    
1606         c. Added cases for JP and JNP in X86FreqProps.
1607    
1608      3. CFG
1609    
1610         CFG now has a bunch of methods for edge splitting and merging.
1611    
1612      4. Machine description.
1613    
1614         John's simplification of MLTREE_BASIS.fcond broke a few machine
1615         description things:
1616    
1617         rtl-build.{sig,sml} and hppa.mdl fixed.
1618    
1619         NOTE: the machine description stuff in the repository is still broken.
1620               Again, I can't put my fixes in because that involves
1621               changes to MLTREE.
1622    
1623    ----------------------------------------------------------------------
1624    Name: Matthias Blume
1625    Date: 2002/03/20 15:55:00 EST
1626    Tag: blume-20020320-kmp
1627    Description:
1628    
1629    Implemented Knuth-Morris-Pratt string matching in PreString and used
1630    it for String.isSubstring, Substring.isSubstring, and
1631    Substring.position.
1632    
1633    (Might need some stress-testing.  Simple examples worked fine.)
1634    
1635    ----------------------------------------------------------------------
1636    Name: Matthias Blume
1637    Date: 2002/03/19 16:37:00 EST
1638    Tag: blume-20020319-witnesses
1639    Description:
1640    
1641    Added a structure C.W and functions convert/Ptr.convert to ml-nlffi-lib.
1642    
1643    This implements a generic mechanism for changing constness qualifiers
1644    anywhere within big C types without resorting to outright "casts".
1645    (So far, functions such as C.rw/C.ro or C.Ptr.rw/C.Ptr.ro only let you
1646    modify the constness at the outermost level.)
1647    The implementation of "convert" is based on the idea of "witness"
1648    values -- values that are not used by the operation but whose types
1649    "testify" to their applicability.  On the implementation side, "convert"
1650    is simply a projection (returning its second curried argument).  With
1651    cross-module inlining, it should not result in any machine code being
1652    generated.
1653    
1654    ----------------------------------------------------------------------
1655    Name: Matthias Blume
1656    Date: 2002/03/15 16:40:00 EST
1657    Tag: blume-20020315-basis
1658    Description:
1659    
1660    Provided (preliminary?) implementations for
1661    
1662      {String,Substring}.{concatWith,isSuffix,isSubstring}
1663    
1664    and
1665    
1666      Substring.full
1667    
1668    Those are in the Basis spec but they were missing in SML/NJ.
1669    
1670    ----------------------------------------------------------------------
1671    Name: Matthias Blume
1672    Date: 2002/03/14 21:30:00 EST
1673    Tag: blume-20020314-controls
1674    Description:
1675    
1676    Controls:
1677    ---------
1678    
1679    1. Factored out the recently-added Controls : CONTROLS stuff and put
1680       it into its own library $/controls-lib.cm.  The source tree for
1681       this is under src/smlnj-lib/Controls.
1682    
1683    2. Changed the names of types and functions in this interface, so they
1684       make a bit more "sense":
1685    
1686          module -> registry
1687          'a registry -> 'a group
1688    
1689    3. The interface now deals in ref cells only.  The getter/setter interface
1690       is (mostly) gone.
1691    
1692    4. Added a function that lets one register an already-existing ref cell.
1693    
1694    5. Made the corresponding modifications to the rest of the code so that
1695       everything compiles again.
1696    
1697    6. Changed the implementation of Controls.MLRISC back to something closer
1698       to the original.  In particular, this module (and therefore MLRISC)
1699       does not depend on Controls.  There now is some link-time code in
1700       int-sys.sml that registers the MLRISC controls with the Controls
1701       module.
1702    
1703    CM:
1704    ---
1705    
1706      * One can now specify the lambda-split aggressiveness in init.cmi.
1707    
1708    ----------------------------------------------------------------------
1709    Name: Allen Leung
1710    Date: 2002/03/13 17:30:00 EST
1711    Tag: leunga-20020313-x86-fp-unary
1712    Description:
1713    
1714    Bug fix for:
1715    
1716    > leunga@weaselbane:~/Yale/tmp/sml-dist{21} bin/sml
1717    > Standard ML of New Jersey v110.39.1 [FLINT v1.5], March 08, 2002
1718    > - fun f(x,(y,z)) = Real.~ y;
1719    > [autoloading]
1720    > [autoloading done]
1721    >       fchsl   (%eax), 184(%esp)
1722    > Error: MLRisc bug: X86MCEmitter.emitInstr
1723    >
1724    > uncaught exception Error
1725    >   raised at: ../MLRISC/control/mlriscErrormsg.sml:16.14-16.19
1726    
1727    The problem was that the code generator did not generate any fp registers
1728    in this case, and the ra didn't know that it needed to run the X86FP phase to
1729    translate the pseudo fp instruction.   This only happened with unary fp
1730    operators in certain situations.
1731    
1732    ----------------------------------------------------------------------
1733    Name: Matthias Blume
1734    Date: 2002/03/13 14:00:00 EST
1735    Tag: blume-20020313-overload-etc
1736    Description:
1737    
1738    1. Added _overload as a synonym for overload for backward compatibility.
1739       (Control.overloadKW must be true for either version to be accepted.)
1740    
1741    2. Fixed bug in install script that caused more things to be installed
1742       than what was requested in config/targets.
1743    
1744    3. Made CM aware of the (_)overload construct so that autoloading
1745       works.
1746    
1747    ----------------------------------------------------------------------
1748    Name: Matthias Blume
1749    Date: 2002/03/12 22:03:00 EST
1750    Tag: blume-20020312-url
1751    Description:
1752    
1753    Forgot to update BOOT and srcarchiveurl.
1754    
1755    ----------------------------------------------------------------------
1756    Name: Matthias Blume
1757    Date: 2002/03/12 17:30:00 EST
1758    Tag: blume-20020312-version110392
1759    Description:
1760    
1761    Yet another version number bump (because of small changes to the
1762    binfile format).  Version number is now 110.39.2.  NEW BOOTFILES!
1763    
1764    Changes:
1765    
1766      The new pid generation scheme described a few weeks ago was overly
1767      complicated.  I implemented a new mechanism that is simpler and
1768      provides a bit more "stability":  Once CM has seen a compilation
1769      unit, it keeps its identity constant (as long as you do not delete
1770      those crucial CM/GUID/* files).  This means that when you change
1771      an interface, compile, then go back to the old interface, and
1772      compile again, you arrive at the original pid.
1773    
1774      There now also is a mechanism that instructs CM to use the plain
1775      environment hash as a module's pid (effectively making its GUID
1776      the empty string).  For this, "noguid" must be specified as an
1777      option to the .sml file in question within its .cm file.
1778      This is most useful for code that is being generated by tools such
1779      as ml-nlffigen (because during development programmers tend to
1780      erase the tool's entire output directory tree including CM's cached
1781      GUIDs).  "noguid" is somewhat dangerous (since it can be used to locally
1782      revert to the old, broken behavior of SML/NJ, but in specific cases
1783      where there is no danger of interface confusion, its use is ok
1784      (I think).
1785    
1786      ml-nlffigen by default generates "noguid" annotations.  They can be
1787      turned off by specifying -guid in its command line.
1788    
1789    ----------------------------------------------------------------------
1790    Name: Lal George
1791    Date: 2002/03/12 12 14:42:36 EST
1792    Tag: george-20020312-frequency-computation
1793    Description:
1794    
1795    Integrated jump chaining and static block frequency into the
1796    compiler. More details and numbers later.
1797    
1798    ----------------------------------------------------------------------
1799    Name: Lal George
1800    Date: 2002/03/11 11 22:38:53 EST
1801    Tag: george-20020311-jump-chain-elim
1802    Description:
1803    
1804    Tested the jump chain elimination on all architectures (except the
1805    hppa).  This is on by default right now and is profitable for the
1806    alpha and x86, however, it may not be profitable for the sparc and ppc
1807    when compiling the compiler.
1808    
1809    The gc test will typically jump to a label at the end of the cluster,
1810    where there is another jump to an external cluster containing the actual
1811    code to invoke gc. This is to allow factoring of common gc invocation
1812    sequences. That is to say, we generate:
1813    
1814            f:
1815               testgc
1816               ja   L1      % jump if above to L1
1817    
1818            L1:
1819               jmp L2
1820    
1821    
1822    After jump chain elimination the 'ja L1' instructions is converted to
1823    'ja L2'. On the sparc and ppc, many of the 'ja L2' instructions may end
1824    up being implemented in their long form (if L2 is far away) using:
1825    
1826            jbe     L3      % jump if below or equal to L3
1827            jmp     L2
1828         L3:
1829            ...
1830    
1831    
1832    For large compilation units L2  may be far away.
1833    
1834    
1835    ----------------------------------------------------------------------
1836    Name: Matthias Blume
1837    Date: 2002/03/11 13:30:00 EST
1838    Tag: blume-20020311-mltreeeval
1839    Description:
1840    
1841    A functor parameter was missing.
1842    
1843    ----------------------------------------------------------------------
1844    Name: Allen Leung
1845    Date: 2002/03/11 10:30:00 EST
1846    Tag: leunga-20020311-runtime-string0
1847    Description:
1848    
1849       The representation of the empty string now points to a
1850    legal null terminated C string instead of unit.  It is now possible
1851    to convert an ML string into C string with InlineT.CharVector.getData.
1852    This compiles into one single machine instruction.
1853    
1854    ----------------------------------------------------------------------
1855    Name: Allen Leung
1856    Date: 2002/03/10 23:55:00 EST
1857    Tag: leunga-20020310-x86-call
1858    Description:
1859    
1860       Added machine generation for CALL instruction (relative displacement mode)
1861    
1862    ----------------------------------------------------------------------
1863    Name: Matthias Blume
1864    Date: 2002/03/08 16:05:00
1865    Tag: blume-20020308-entrypoints
1866    Description:
1867    
1868    Version number bumped to 110.39.1.  NEW BOOTFILES!
1869    
1870    Entrypoints: non-zero offset into a code object where execution should begin.
1871    
1872    - Added the notion of an entrypoint to CodeObj.
1873    - Added reading/writing of entrypoint info to Binfile.
1874    - Made runtime system bootloader aware of entrypoints.
1875    - Use the address of the label of the first function given to mlriscGen
1876      as the entrypoint.  This address is currently always 0, but it will
1877      not be 0 once we turn on block placement.
1878    - Removed the linkage cluster code (which was The Other Way(tm) of dealing
1879      with entry points) from mlriscGen.
1880    
1881    ----------------------------------------------------------------------
1882  Name: Allen Leung  Name: Allen Leung
1883  Date: 2002/03/07 20:45:00 EST  Date: 2002/03/07 20:45:00 EST
1884  Tag: leunga-20020307-x86-cmov  Tag: leunga-20020307-x86-cmov

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