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[smlnj] Diff of /sml/trunk/HISTORY
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Diff of /sml/trunk/HISTORY

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revision 1179, Tue Mar 26 03:04:46 2002 UTC revision 1393, Fri Sep 26 17:00:32 2003 UTC
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13  Description:  Description:
14    
15  ----------------------------------------------------------------------  ----------------------------------------------------------------------
16    Name: Matthias Blume (blume (at) tti - c (dot) org)
17    Date: 2003/09/26 12:00:00 CDT
18    Tag: blume-20030926-ppautoload
19    Description:
20    
21    I modified the read-eval-print loop so that the autoloader gets
22    invoked whenever the prettyprinter tries to look up a symbol that
23    is not currently defined in the toplevel environment but which
24    appears in CM's autoload registry.  As a result, we see far fewer of
25    those ?.Foo.Bar.xxx names in the prettyprinter's output.
26    
27    In addition to this I tried to clean up some pieces of the Basis
28    implementation (e.g., Socket, Word8Array) in order to prevent other
29    instances of these ?.Foo.Bar.xxx names from being printed.
30    
31    The mechanism that picks names for types still needs some work, though.
32    (Right now it seems that if there is a type A.t which is defined to
33    be B.y, but B is unavailable at toplevel, then A.t gets printed as
34    "?.B.t" although the perhaps more sensible solution would be to use
35    "A.t" in this case.  In other words, the prettyprinter should follow
36    a chain of DEFtycs not farther than there are corresponding toplevel
37    names in the current environment.)
38    
39    ----------------------------------------------------------------------
40    Name: Matthias Blume (blume (at) tti - c (dot) org)
41    Date: 2003/09/24 16:31:00 CDT
42    Tag: blume-20030924-installer
43    Description:
44    
45    Another installer tweak:  All the ML code for the installer is now
46    compiled during CMB.make and put into a little library called
47    $smlnj/installer.cm.  The installation then simply invokes
48    
49       sml -m $smlnj/installer.cm
50    
51    and everything happens automagically.
52    
53    Win32:  ML code senses value of environment variable SMLNJ_HOME.
54    Unix:   ML code senses values of environment variables ROOT, CONFIGDIR,
55            and BINDIR.
56    
57    The new scheme guarantees that the ML code responsible for the installation
58    is in sync with the APIs of the main system.  Also, the installer is
59    somewhat faster because the installer script is precompiled.
60    
61    ----------------------------------------------------------------------
62    Name: Matthias Blume (blume (at) tti - c (dot) org)
63    Date: 2003/09/24 15:35:00 CDT
64    Tag: blume-20030924-synsock
65    Description:
66    
67    Added a signature SYNCHRONOUS_SOCKET to basis.cm.  This is like SOCKET
68    but excludes all non-blocking operations.  Defined SOCKET (in Basis)
69    and CML_SOCKET in terms of SYNCHRONOUS_SOCKET.  Removed superfluous
70    implementations of non-blocking operations from CML's Socket
71    structure.
72    
73    ----------------------------------------------------------------------
74    Name: Matthias Blume (blume (at) tti - c (dot) org)
75    Date: 2003/09/24 15:10:05 CDT
76    Tag: blume-20030924-sockets
77    Description:
78    
79    1. Fixed SOCKET API and implementation to match Basis spec.
80       This required changing the internal representation of sockets to one
81       that remembers (for each socket file descriptor) whether it is currently
82       blocking or non-blocking.  This state is maintained lazily (i.e., a system
83       call is made only if the state actually needs to change).
84    
85    2. OS-specific details of sockets were moved into separate files, thus
86       making it possible to unify the bulk of the socket implementations
87       between Unix and Win32.
88    
89    3. CML's socket API changed accordingly.
90       (Note that we need to remove non-blocking functions from this API
91       since they are redundant in the case of CML!)
92    
93    4. CML's socket implementation now makes use of non-blocking functions
94       provided by Basis, thus removing all OS-dependent code from this part
95       of CML.
96    
97    5. Changed Real64.precision from 52 to 53.  Minor cleanup in Real64 code.
98    
99    ----------------------------------------------------------------------
100    Name: Matthias Blume (blume (at) tti - c (dot) org)
101    Date: 2003/09/22 12:10:00 CDT
102    Tag: blume-20030922-110_43_2
103    Description:
104    
105    Made a new interim version and bootfiles for developer's bootstrapping
106    convenience.
107    
108       110.43.2 -- NEW BOOTFILES
109    
110    ----------------------------------------------------------------------
111    Name: Matthias Blume (blume (at) tti - c (dot) org)
112    Date: 2003/09/19 15:55:00 CDT
113    Tag: blume-20030919-cmdir
114    Description:
115    
116    1. new-install.sh -> install.sh
117    2. changed default CM "metadata" directory name to ".cm" (instead of "CM")
118    3. tweaked installer so that another name instead of .cm can be chosen
119       at install time (by setting the CM_DIR_ARC environment variable
120       during installation); once installation is complete, the name is
121       fixed
122    
123    ----------------------------------------------------------------------
124    Name: Matthias Blume (blume (at) tti - c (dot) org)
125    Date: 2003/09/18 16:00:00 CDT
126    Tag: blume-20030918-110_43_1
127    Description:
128    
129    Made a new interim version and bootfiles for developer's bootstrapping
130    convenience.
131    
132       110.43.1 -- NEW BOOTFILES
133    
134    ----------------------------------------------------------------------
135    Name: Matthias Blume (blume (at) tti - c (dot) org)
136    Date: 2003/09/18 15:20:00 CDT
137    Tag: blume-20030918-misc
138    Description:
139    
140    1. Exported fractionsPerSecond etc. from TimeImp (but not from Time as
141       this seems to be controversial at the moment) and used those in
142       Posix.ProcEnv.times.
143    
144    2. Added Time.{from,to}Nanoseconds to Time.
145    
146    3. Improved Real.{from,to}LargeInt by avoiding needless calculations.
147       For example, fromLargeInt never needs to look at more than 3 "big
148       digits" to get its 53 bits of precision.
149    
150    ----------------------------------------------------------------------
151    Name: Matthias Blume (blume (at) tti - c (dot) org)
152    Date: 2003/09/17 16:30:00 CDT
153    Tag: blume-20030917-real32-slices
154    Description:
155    
156    Added an entry to the primitive environment
157    (compiler/Semant/statenv/prim.sml) for int32->real64 conversion and
158    added code to compiler/CodeGen/main/mlriscGen.sml to implement it.
159    
160    Removed some of the "magic" constants in real64.sml and replaced them
161    with code that generates these values from their corresponding
162    integer counterparts.
163    
164    Made all(?) the slice-related changes to the Basis and made everything
165    compile again...
166    
167    ----------------------------------------------------------------------
168    Name: Matthias Blume (blume (at) tti - c (dot) org)
169    Date: 2003/09/15 17:45:00 CDT
170    Tag: blume-20030915-rbase
171    Description:
172    
173    Fixed bug in Real.fromLargeInt.
174    
175    ----------------------------------------------------------------------
176    Name: Matthias Blume (blume (at) tti - c (dot) org)
177    Date: 2003/09/13 18:11:00 CDT
178    Tag: blume-20030913-libinstall
179    Description:
180    
181    Minor bugfix in config/libinstall (set anchor with path to
182    standalone tool after installing it, otherwise libraries that
183    need ml-lex or ml-yacc won't compile the first time the installer
184    runs).
185    
186    ----------------------------------------------------------------------
187    Name: Matthias Blume (blume (at) tti - c (dot) org)
188    Date: 2003/09/12 11:45:00 CDT
189    Tag: blume-20030912-various
190    Description:
191    
192     - fixed bug in Real.toLargeInt
193     - fixed bug in Posix.ProcEnv.times
194     - changed inputLine functions to return an option
195     - minor installer improvements / bugfixes
196     - changed default @SMLalloc parameter for x86/celeron to 64k
197    
198    ----------------------------------------------------------------------
199    Name: Matthias Blume (blume (at) tti - c (dot) org)
200    Date: 2003/09/09 22:00:00 CDT
201    Tag: Release_110_43
202    Description:
203    
204        New working release 110.43.  New bootfiles.
205    
206    ----------------------------------------------------------------------
207    Name: Matthias Blume (blume (at) tti - c (dot) org)
208    Date: 2003/09/09 19:20:00 CDT
209    Tag: blume-20030909-installer
210    Description:
211    
212    Rewrote large parts of config/install.sh in SML (config/libinstall.sml).
213    Modified config/install.bat to take advantage of it.  Also modified
214    config/install.sh (and called it config/new-install.sh) to take advantage
215    of it on Unix systems.  (The SML code is (supposed to be) platform-
216    independent.)
217    
218    The installer can now install everything under Win32
219    as well as under *nix as long as it compiles.
220    
221    Other changes:
222    
223      - made CML compile again under Win32
224      - made eXene compile under Win32 (by providing a fake structure UnixSock
225        and by using OS.Process.getEnv instead of Posix.ProcEnv.getenv)
226      - fixed a bug in nowhere: it assumed that type OS.Process.status is the
227        same as type int;  under Win32 it isn't
228      - fixed some slice-related problems in the win32-specific parts of CML
229      - added a functor argument "sameVol" to os-path-fn.sml in the Basis
230        (under Win32, the volume name is case-insensitive, and the
231        OS.Path code compares volume names for equality)
232    
233    ----------------------------------------------------------------------
234    Name: Matthias Blume (blume (at) tti - c (dot) org)
235    Date: 2003/09/08 11:55:00 CDT
236    Tag: blume-20030908-fullpath
237    Description:
238    
239    Made Win32 version of OS.FileSys.fullPath return current directory
240    when given an empty string.  This is what the spec says, and incidentally,
241    CM depends on it.  (CM otherwise goes into an infinite loop in certain
242    cases when presented with the name of a non-existing .cm file.)
243    
244    ----------------------------------------------------------------------
245    Name: Matthias Blume (blume (at) tti - c (dot) org)
246    Date: 2003/09/04 16:30:00 CDT
247    Tag: blume-20030905-slices-etc
248    Description:
249    
250      1. Changed interface to vectors and arrays in Basis to match
251         (draft) Basis spec.
252      2. Added signatures and implementations of slices according to
253         Basis spec.
254      3. Edited source code throughout the system to make it compile again
255         under 1. and 2.  (In some cases code had to be added to have it
256         match the new signatures.)
257      4. MLRISC should be backward-compatible: the copies of the originals
258         of files that needed to change under 3. were retained, the .cm files
259         check the compiler version number and use old versions when
260         appropriate.
261      5. Changed type of OS.FileSys.readDir and Posix.FileSys.readdir to
262         dirstream -> string option (in accordance with Basis spec).
263      6. When generating code that counts lines, ml-lex used function
264         CharVector.foldli, taking advantage of its old interface.
265         This has been replaced with the corresponding code from
266         CharVectorSlice.  (html-lex must be re-lexed!)
267      7. BitArray in smlnj-lib/Util has been extended/modified to match the
268         new MONO_ARRAY signature.  (Do we need BitArraySlice?)
269      8. Removed temporary additions (fromInternal, toInternal) from the
270         (now obsolete) IntInf in smlnj-lib/Util.
271      9. Cleaned up structure Byte.
272     10. Added localOffset, scan, and fromString to Date (according to spec).
273         Cleaned/corrected implementation of Date.
274         (Still need to check for correctness; implement better canonicalizeDate.)
275     11. Added "scan" to signature IEEE_REAL.
276     12. Some improvements to IntInf [in particular: efficiency-hack for
277         mod and rem when second operand is 2 (for parity checks).]
278     13. Changed representation of type Time.time, using a single IntInf.int
279         value counting microseconds.  This considerably simplified the
280         implementation of structure Time.  We now support negative time
281         values; scan and fromString handle signs.
282     14. Functor PrimIO now takes two additional arguments (VectorSlice and
283         ArraySlice).
284    
285    ----------------------------------------------------------------------
286    Name: Matthias Blume (blume (at) tti - c (dot) org)
287    Date: 2003/08/28 17:00:00 CDT
288    Tag: blume-20030828-intinf
289    Description:
290    
291    This is a major update which comes with a version number bump
292    (110.42.99 -- yes, we are really close to 110.43 :-), NEW BOOTFILES,
293    and an implementation of IntInf in the Basis.
294    
295    There are a fairly large number of related changes and updates throughout
296    the system:
297    
298    Basis:
299            - Implemented IntInf.
300            - Made LargeInt a projection of IntInf (by filtering through INTEGER).
301            - Added some missing Real64 operations, most notably Real.toLargeInt.
302            - Added FixedInt as a synonym for Int32.
303    
304    compiler:
305            * Added support for a built-in intinf type.
306              - literals
307              - pattern matching
308              - conversion shortcuts (Int32.fromLarge o Int.toLarge etc.)
309              - overloading on literals and operations
310    
311            This required adding a primitive type intinf, some additional
312            primops, and implementations for several non-trivial intinf
313            operations in Core.  (The intinf type is completely abstract
314            to the compiler; all operations get delegated back to the Core.)
315    
316            * Intinf equality is handled by polyequal.  However, the compiler
317            does not print its usual warning in this case (since polyequal
318            is the right thing to do there).
319    
320            * Improved the organization of structure InlineT.
321    
322            * A word about conversion primops:
323            If conversions involving intinf do not cancel out during
324            CPS contract, then the compiler must insert calls to Core functions.
325            Since all core access must be resolved already during the FLINT
326            translate phase, it would be too late a the time of CPS contract
327            to add new Core calls.  For this reason, conversion primops
328            for intinf carry two arguments:  1. the numeric argument that
329            they are supposed to convert, and 2. the Core function that
330            can help with this conversion if necessary.  If CPS contract
331            eliminates a primop, then the associated Core function becomes
332            dead and goes away.  Intinf conversion primops that do not get
333            eliminated by CPS contract get rewritten into calls of their
334            core functions by a separate, new phase.
335    
336    interactive system:
337            - Control.Print.intinfDepth controls max length of intinf constants
338            being printed. (Analogous to Control.Print.stringDepth.)
339            - Cleanup in printutil and pputil: got rid of unused stuff and
340            duplicates; replaced some of the code with code that makes better
341            use of library functionality.
342    
343    CM:
344            Bugfix: parse-errors in init group (system/smlnj/init/init.cmi)
345            are no longer silent.
346    
347    CKIT:
348            Fixed mismatched uses of Int32 and LargeInt.  I always decided
349            in favor of LargeInt -- which is now the same as IntInf.
350            CKIT-knowledgable people should check whether this is what's
351            intended and otherwise change things back to using Int32 or
352            FixedInt.
353    
354    Throughout the code:
355            Started using IntInf.int literals and built-in operations
356            (e.g., comparison with 0) where this seems appropriate.
357    
358    
359    ----------------------------------------------------------------------
360    Name: Dave MacQueen (dbm@cs.uchicago.edu)
361    Date: 2003/08/13 11:36:00 CDT
362    Tag: dbm-20030813-mcz-merge1
363    Description:
364    
365    Merging changes from the mcz-branch development branch into trunk.
366    These changes involve replacement of the emulated old prettyprinter
367    interface with direct use of the SML/NJ Lib PP library, and fixing
368    of a couple of bugs (895, 1186) relating to error messages.  A new
369    prettyprinter for ast datatypes (Elaborator/print/ppast.{sig,sml})
370    has been added.
371    
372    ----------------------------------------------------------------------
373    Name: Matthias Blume (blume (at) tti - c (dot) org)
374    Date: 2003/08/11 15:45:00 CDT
375    Tag: blume-20030811-windows
376    Description:
377    
378    Version number bumped to 110.42.9.  NEW BOOTFILES!!!
379    
380        http://smlnj.cs.uchicago.edu/dist/working/110.42.9/
381    
382    This patch restores SML/NJ's ability to run under win32.  There are a
383    number of changes, including fixes for several bugs that had gone
384    unnoticed until now:
385    
386      - uname "CYGWIN_NT*" is recognized as win32 (This is relevant only when
387        trying to run the win32 version from within cygwin.)
388    
389      - There are a number of simple .bat scripts that substitute for their
390        corresponding Unix shell-scripts.  (See below.)
391    
392      - The internals of ml-build have been modified slightly.  The main
393        difference is that instead of calling ".link-sml" (or link-sml.bat)
394        using OS.Process.system, the ML process delegates this task back
395        to the script.  Otherwise problems arise in mixed environments such
396        as Cygwin where scripts look and work like Unix scripts, but
397        where OS.Process.system cannot run them.
398    
399      - In CM, the srcpath pickler used native pathname syntax -- which
400        is incorrect in the case of cross-compilation.  The new pickle format
401        is independent of platform-specific naming conventions.
402    
403      - Path configuration files (such as lib/pathconfig) can now choose
404        between native and standard syntax.  Placing a line of the form
405    
406            standard!
407    
408        into the file causes all subsequent paths to be interpreted using
409        CM standard pathname syntax (= Unix conventions); a line
410    
411            native!
412    
413        switches back to native style.  This was needed so that
414        path config files can be written portably, see src/system/pathconfig.
415    
416      - Runtime system:
417    
418          - win32-filesys.c:  get_file_time and set_file_time now
419            access modification time, not creation time.
420    
421          - I/O code made aware of new array representation.
422    
423          - Bug fixes in X86.prim.masm.
424    
425       - src/system/makeml made aware of win32. (For use under cygwin
426            and other Unix-environments for windows.)
427    
428       - In Basis, fixed off-by-one error in win32-io.sml (function vecF)
429         which caused BinIO.inputAll to fail consistently.
430    
431    .bat scripts:
432    
433       Windows .bat scripts assume that SMLNJ_HOME is defined.
434    
435       - sml.bat, ml-yacc.bat, ml-lex.bat:  Driver scripts for standalone
436         applications (sml, ml-yacc, ml-lex).
437       - ml-build.bat: analogous to ml-build.
438       - config\install.bat:  Analogous to config/install.sh.  This requires
439         that SMLNJ_HOME is set and that Microsoft Visual C is ready to use.
440         (nmake etc. must be on the path, and vcvars32 must have been run.)
441         Moreover, sources for ml-lex and ml-yacc need to exist under src,
442         and the bootfile hierarchy must have been unpacked under
443         sml.boot.x86-win32.
444         The script is very primitive and does a poor job at error checking.
445         It only installs the base system, ml-lex, and ml-yacc.  No other
446         libraries are being installed (i.e., you get only those that
447         are part of the compiler.)
448       - link-sml.bat:  analogous to .link-sml, but not currently used
449    
450    Unrelated bug fixes:
451    
452      - ml-nlffigen now exports structures ST_* corresponding to incomplete
453        types.
454      - Added getDevice to PP/src/pp-debug-fn.sml.  (Would not compile
455        otherwise.)
456    
457    ----------------------------------------------------------------------
458    Name: Dave MacQueen (macqueen@cs.uchicago.edu)
459    Date: 2003/06/17
460    Tag: macqueen-20030617-bug895
461    Description:
462    
463    Modified compiler/Elaborator/print/pptype.sml to fix bug 895.
464    Tag will be used for new development branch (mcz-branch) for
465    use by MacQueen, (Lucasz) Zairek, and (George) Cao at uchicago.
466    
467    ----------------------------------------------------------------------
468    Name: Matthias Blume (blume (at) tti - c (dot) org)
469    Date: 2003/05/27 16:55:00 CDT
470    Tag: blume-20030527-polyeq
471    Description:
472    
473    Tried to eliminated most cases of polymorphic equality.
474    
475    ----------------------------------------------------------------------
476    Name: Matthias Blume (blume (at) tti - c (dot) org)
477    Date: 2003/05/21 17:45:00 CDT
478    Tag: blume-20030517-complete
479    Description:
480    
481    Two changes:
482    
483      1. Added a flag for controlling whether non-exhaustive bindings will
484         be treated as errors (default is false).
485      2. Cleaned up the *entire* source tree so that CMB.make goes through
486         without a single non-exhaustive match- or bind warning.
487    
488    ----------------------------------------------------------------------
489    Name: Matthias Blume (blume (at) tti - c (dot) org)
490    Date: 2003/05/17 10:20:00 CDT
491    Tag: blume-20030517-absyn
492    Description:
493    
494    1. Added cases for IF, WHILE, ANDALSO, and ORELSE to Absyn.
495    
496       This mainly affects the quality of error messages.  However, some
497       of the code is now more straightforward than before. (Treatment of
498       the above four constructs in translate.sml is much simpler than
499       the "macro-expansion" that was going on before.  Plus, the mach-
500       compiler no longer gets invoked just to be able to compile an
501       if-expression.)
502    
503    2. The ErrorMsg.Error exception is now caught and absorbed by the
504       interactive loop.
505    
506    ----------------------------------------------------------------------
507    Name: Allen Leung
508    Date: 2003/05/16 13:05:00 CDT
509    Tag: leunga-20030516-cygwin-runtime
510    Description:
511    
512        Ported the runtime system to cygwin, which uses the unix
513    x86-unix bin files.  Missing/buggy features:
514    
515       o getnetbyname, getnetbyaddr: these functions seem to be missing in
516         the Cygwin library.
517       o Ctrl-C handling may be flaky.
518       o Windows system calls and Windows I/O are not supported.
519    
520       A new set of binfiles is located at:
521    
522         http://www.dorsai.org/~leunga/boot.x86-unix.tgz
523    
524       This is only needed for bootstrapping the cygwin version of smlnj.
525       Other x86 versions can use the existing binfiles.
526    
527    ----------------------------------------------------------------------
528    Name: Matthias Blume
529    Date: 2003/04/08 15:42:00 CDT
530    Tag: blume-20030408-listpair
531    Description:
532    
533    1. Added a target 'mlrisc' to installer.
534    
535    2. Added missing elements to structure ListPair.
536    
537    ----------------------------------------------------------------------
538    Name: Allen Leung
539    Date: 2003/01/07 10:40:00 EST
540    Tag: leunga-20030107-int-rem
541    Description:
542    
543    Fixed a bug in Int.rem(x,y) where y is a power of 2 on x86.
544    The arguments to the SUBL instruction were swapped.
545    
546    ----------------------------------------------------------------------
547    Name: Matthias Blume
548    Date: 2002/12/12 16:25:00 EST
549    Tag: blume-20021212-risc-ra
550    Description:
551    
552    Fixed a serious bug in the rewrite code for FP spilling/reloading that
553    sent the RA into an infinite loop when floating point registers get
554    spilled.  (Because of this bug, e.g., nucleic stopped compiling between
555    110.37 and 110.38.)
556    There was another set of potential problems related to the handling of
557    MLRISC annotations (but those did not yet cause real problems, apparently).
558    
559    ----------------------------------------------------------------------
560    Name: Matthias Blume
561    Date: 2002/12/06 22:40:00 EST
562    Tag: blume-20021206-cm-fileid
563    Description:
564    
565    Added a call of SrcPath.sync at the beginning of Parse.parse (in CM).
566    This fixes the problem of CM getting confused by files that suddenly
567    change their identity (e.g., by getting unlinked and recreated by some
568    text editor such as vi).  There might be a better/cheaper/cleaner way
569    of doing this, but for now this will have to do.
570    
571    ----------------------------------------------------------------------
572    Name: Matthias Blume
573    Date: 2002/10/28 09:50:00 EST
574    Tag: blume-20021028-typecheck
575    Description:
576    
577    Exported structure Typecheck from $smlnj/viscomp/core.cm.
578    
579    ----------------------------------------------------------------------
580    Name: Matthias Blume
581    Date: 2002/10/17 09:10:00 EDT
582    Tag: Release_110_42
583    Description:
584    
585    In good old tradition, there has been a slight hiccup so that we have
586    to patch 110.42 after the fact.   The old release tag has been replaced
587    (see below).
588    
589    The change solves a problem with two competing approaches the
590    configuration problem regarding MacOS 10.1 vs. MacOS 10.2 which got in
591    each other's way.
592    
593    This change only affects the runtime system code and the installer script.
594    (No new bootfiles.)
595    
596    ----------------------------------------------------------------------
597    Name: Matthias Blume
598    Date: 2002/10/16 12:00:00 EDT
599    Tag: Release_110_42_removed
600    Description:
601    
602    New working release.  New bootfiles.
603    
604    ----------------------------------------------------------------------
605    Name: Matthias Blume
606    Date: 2002/10/10 13:10:00 EDT
607    Tag: blume-20021010-ppc-divs
608    Description:
609    
610    The mltree operator DIVS must be implemented with an overflow check on
611    the PPC because the hardware indicates divide-by-zero using "overflow" as
612    well.
613    
614    ----------------------------------------------------------------------
615    Name: Matthias Blume
616    Date: 2002/07/23 11:45:00
617    Tag: blume-20020723-smlnj-home
618    Description:
619    
620    Sml now senses the SMLNJ_HOME environment variable.  If this is set,
621    then the bin dir is assumed to be in $SMLNJ_HOME/bin and (unless
622    CM_PATHCONFIG is also set), the path configuration file is assumed
623    to be in $SMLNJ_HOME/lib/pathconfig.  This way one can easily move
624    the entire tree to some other place and everything will "just work".
625    
626    (Companion commands such as ml-build and ml-makedepend also sense this
627    variable.)
628    
629    ----------------------------------------------------------------------
630    Name: Matthias Blume
631    Date: 2002/07/12 21:19:00 EDT
632    Tag: blume-20020712-liveness
633    Description:
634    
635    Exported two useful "step" functions from liveness module (MLRISC).
636    
637    ----------------------------------------------------------------------
638    Name: Matthias Blume
639    Date: 2002/07/05 16:00 EDT
640    Tag: Release_110_41
641    Description:
642    
643    New working release.  New bootfiles.
644    
645    ----------------------------------------------------------------------
646    Name: Matthias Blume
647    Date: 2002/07/05 10:25:00 EDT
648    Tag: blume-20020705-btimp
649    Description:
650    
651    Exported structure BTImp from $smlnj/viscomp/debugprof.cm so that
652    other clients can set up backtracing support.
653    
654    ----------------------------------------------------------------------
655    Name: Matthias Blume
656    Date: 2002/06/25 17:23:00 EDT
657    Tag: blume-20020625-fpmax
658    Description:
659    
660    Fixed a bug in translation of INLMAX (and INLMIN) for the floating-point
661    case.  (The sense of the isNaN test was reversed -- which made min and
662    max always return their first argument.)
663    
664    ----------------------------------------------------------------------
665    Name: Matthias Blume
666    Date: 2002/06/11
667    Tag: blume-20020611-unixpath
668    Description:
669    
670    Back-ported OS.Path.{from,to}UnixPath from idlbasis-devel branch.
671    
672    ----------------------------------------------------------------------
673    Name: Matthias Blume
674    Date: 2002/06/10 16:35:00 EDT
675    Tag: blume-20020610-ieeereal
676    Description:
677    
678    I back-ported my implementation of IEEEReal.fromString from the
679    idlbasis-devel branch so that we can test it.
680    
681    Another small change is that ppDec tries to give more information
682    than just "<sig>" in the case of functors.  However, this code is
683    broken in some mysterious way if the functor's body's signature
684    has not been declared by ascription but gets inferred from the
685    implementation.  This needs fixing...
686    
687    ----------------------------------------------------------------------
688    Name: Matthias Blume
689    Date: 2002/05/31
690    Tag: blume-20020531-btrace-mode
691    Description:
692    
693    Resurrected SMLofNJ.Internals.BTrace.mode.  (It accidentally fell by
694    the wayside when I switched over to using Controls everywhere.)
695    
696    ----------------------------------------------------------------------
697    Name: Lal George
698    Date: 2002/05/23 12:21:40 EDT
699    Tag: george-20020523-visual-labels
700    Description:
701    
702    Labels are now displayed in the graphical output to make
703    the fall-through and target blocks obvious.
704    
705    ----------------------------------------------------------------------
706    Name: Matthias Blume
707    Date: 2002/05/22 11:03:00 EDT
708    Tag: blume-20020522-shrink
709    Description:
710    
711    John tweaked yesterday's fix for 1131 to handle an out-of-memory
712    situation that comes up when allocating huge arrays.
713    
714    ----------------------------------------------------------------------
715    Name: Matthias Blume
716    Date: 2002/05/21 16:00:00 EDT
717    Tag: Release_110_40
718    Description:
719    
720    New working release (110.40).  New bootfiles.
721    
722    [Also: John Reppy fixed GC bug 1131.]
723    
724    ----------------------------------------------------------------------
725    Name: Matthias Blume
726    Date: 2002/05/21 12:35:00 EDT
727    Tag: blume-20020521-cmdoc
728    Description:
729    
730    CM documentation update.
731    
732    ----------------------------------------------------------------------
733    Name: Matthias Blume
734    Date: 2002/05/21 10:55:00 EDT
735    Tag: blume-20020521-misc
736    Description:
737    
738    - John tweaked runtime to be silent on heap export (except when
739      GC messages are on).
740    - I added a few more things (cross-compiling versions of CMB) to
741      config/preloads (as suggestions).
742    
743    ----------------------------------------------------------------------
744    Name: Matthias Blume
745    Date: 2002/05/20 22:25:00 EDT
746    Tag: blume-20020520-controls
747    Description:
748    
749    - Added ControlUtil structure to control-lib.cm.
750    - Use it throughout.
751    - Used Controls facility to define MLRISC controls (as opposed to
752      registering MLRISC control ref cells with Controls after the fact)
753    - Fixed messed-up controls priorities.
754    
755    * Removed again all the stuff from config/preloads that one wouldn't
756      be able to preload at the time the initial heap image is built.
757      (Many libraries, e.g., CML, do not exist yet at this time.  The
758       only libraries that can be preloaded via config/preloads are those
759       that come bundled with the bootfiles.)
760    
761    ----------------------------------------------------------------------
762    Name: Matthias Blume
763    Date: 2002/05/20 10:59:00 EDT
764    Tag: blume-20020520-preloads
765    Description:
766    
767    Added a lot of commented-out suggestions for things to be included
768    in config/preloads.
769    
770    ----------------------------------------------------------------------
771    Name: Allen Leung
772    Date: 2002/05/18 14:20:00 EDT
773    Tag: leunga-20020518-mdl
774    Description:
775    
776    o Made the mdl tool stuff compile and run again.
777    o I've disabled all the stuff that depends on RTL specifications; they
778      are all badly broken anyway.
779    
780    ----------------------------------------------------------------------
781    Name: Matthias Blume
782    Date: 2002/05/17 16:49:00 EDT
783    Tag: blume-20020517-controls
784    Description:
785    
786    0. John Reppy made several modifications to the SML/NJ library.
787       In particular, there is a shiny new controls-lib.cm.
788    
789    1. Pushed new controls interface through compiler so that everything
790       compiles again.
791    
792    2. Added FormatComb and FORMAT_COMB to the CML version of the
793       SML/NJ library (so that CML compiles again).
794    
795    3. Modified init scripts because XXX_DEFAULT environment variables
796       are no longer with us.  (Boot-time initialization is now done
797       using the same environment variables that are also used for
798       startup-time initialization of controls.)
799    
800    ----------------------------------------------------------------------
801    Name: Lal George
802    Date: 2002/05/15 09:20:10 EDT
803    Tag: george-20020515-pseudo-op-decls
804    Description:
805    
806            All pseudo-ops emitted before the first segment declaration
807    such as TEXT, DATA, and BSS directives are assumed to be global
808    declarations and are emitted first in the assembly file. This is
809    useful in a number of situations where one has pseudo-ops that are not
810    specific to any segment, and also works around the constraint that one
811    cannot have client pseudo-ops in the TEXT segment.
812    
813            Because no segment is associated with these declarations it is
814    an error to allocate any space or objects before the first segment
815    directive and an exception will be raised. However, we cannot make
816    this check for client pseudo-ops.
817    
818            These top level declarations are a field in the CFG graph_info.
819    In theory you can continue to add to this field after the CFG has been
820    built -- provided you know what you are doing;-)
821    
822    ----------------------------------------------------------------------
823    Name: Matthias Blume
824    Date: 2002/05/13 16:40:00 EDT
825    Tag: blume-20020513-pp-etc
826    Description:
827    
828    A few minor bugfixes:
829    
830      - Stopgap measure for bug recently reported by Elsa Gunter (ppDec).
831        (Bogus printouts for redefined bindings still occur.  Compiler
832        bug should no longer occur now.  We need to redo the prettyprinter
833        from scratch.)
834    
835      - CM pathname printer now also adds escape sequences for ( and )
836    
837      - commend and docu fixes for ml-nlffi
838    
839    ----------------------------------------------------------------------
840    Name: Matthias Blume
841    Date: 2002/05/10 16:40:00 EDT
842    Tag: blume-20020510-erg-textio
843    Description:
844    
845    Applied the following bugfix provided by Emden Gansner:
846    
847        Output is corrupted when outputSubstr is used rather than output.
848    
849        The problem occurs when a substring
850    
851            ss = (s, dataStart, dataLen)
852    
853        where dataStart > 0, fills a stream buffer with avail bytes left.
854        avail bytes of s, starting at index dataStart, are copied into the
855        buffer, the buffer is flushed, and then the remaining dataLen-avail
856        bytes of ss are copied into the beginning of the buffer. Instead of
857        starting this copy at index dataStart+avail in s, the current code
858        starts the copy at index avail.
859    
860        Fix:
861        In text-io-fn.sml, change line 695 from
862             val needsFlush = copyVec(v, avail, dataLen-avail, buf, 0)
863        to
864             val needsFlush = copyVec(v, dataStart+avail, dataLen-avail, buf, 0)
865    
866    ----------------------------------------------------------------------
867    Name: Matthias Blume
868    Date: 2002/04/12 13:55:00 EDT
869    Tag: blume-20020412-assyntax
870    Description:
871    
872    1. Grabbed newer assyntax.h from the XFree86 project.
873    2. Fiddled with how to compile X86.prim.asm without warnings.
874    3. (Very) Minor cleanup in CM.
875    
876    ----------------------------------------------------------------------
877    Name: Matthias Blume
878    Date: 2002/04/01 (no joke!) 17:07:00 EST
879    Tag: blume-20020401-x86div
880    Description:
881    
882    Added full support for div/mod/rem/quot on the x86, using the machine
883    instruction's two results (without clumsily recomputing the remainder)
884    directly where appropriate.
885    
886    Some more extensive power-of-two support was added to the x86 instruction
887    selector (avoiding expensive divs, mods, and muls where they can be
888    replaced with cheaper shifts and masks).  However, this sort of thing
889    ought to be done earlier, e.g., within the CPS optimizer so that
890    all architectures benefit from it.
891    
892    The compiler compiles to a fixed point, but changes might be somewhat
893    fragile nevertheless.  Please, report any strange things that you might
894    see wrt. div/mod/quot/rem...
895    
896    ----------------------------------------------------------------------
897    Name: Matthias Blume
898    Date: 2002/03/29 17:22:00
899    Tag: blume-20020329-div
900    Description:
901    
902    Fixed my broken div/mod logic.  Unfortunately, this means that the
903    inline code for div/mod now has one more comparison than before.
904    Fast paths (quotient > 0 or remainder = 0) are not affected, though.
905    The problem was with quotient = 0, because that alone does not tell
906    us which way the rounding went.  One then has to look at whether
907    remainder and divisor have the same sign...  :(
908    
909    Anyway, I replaced the bootfiles with fresh ones...
910    
911    ----------------------------------------------------------------------
912    Name: Matthias Blume
913    Date: 2002/03/29 14:10:00 EST
914    Tag: blume-20020329-inlprims
915    Description:
916    
917    NEW BOOTFILES!!!    Version number bumped to 110.39.3.
918    
919    Primops have changed. This means that the bin/boot-file formats have
920    changed as well.
921    
922    To make sure that there is no confusion, I made a new version.
923    
924    
925    CHANGES:
926    
927    * removed REMT from mltree (remainder should never overflow).
928    
929    * added primops to deal with divisions of all flavors to the frontend
930    
931    * handled these primops all the way through so they map to their respective
932      MLRISC support
933    
934    * used these primops in the implementation of Int, Int32, Word, Word32
935    
936    * removed INLDIV, INLMOD, and INLREM as they are no longer necessary
937    
938    * parameterized INLMIN, INLMAX, and INLABS by a numkind
939    
940    * translate.sml now deals with all flavors of INL{MIN,MAX,ABS}, including
941      floating point
942    
943    * used INL{MIN,MAX,ABS} in the implementation of Int, Int32, Word, Word32,
944      and Real (but Real.abs maps to a separate floating-point-only primop)
945    
946    
947    TODO items:
948    
949    * Hacked Alpha32 instruction selection, disabling the selection of REMx
950      instructions because the machine instruction encoder cannot handle
951      them.  (Hppa, PPC, and Sparc instruction selection did not handle
952      REM in the first place, and REM is supported by the x86 machine coder.)
953    
954    * Handle DIV and MOD with DIV_TO_NEGINF directly in the x86 instruction
955      selection phase.  (The two can be streamlined because the hardware
956      delivers both quotient and remainder at the same time anyway.)
957    
958    * Think about what to do with "valOf(Int32.minInt) div ~1" and friends.
959      (Currently the behavior is inconsistent both across architectures and
960      wrt. the draft Basis spec.)
961    
962    * Word8 should eventually be handled natively, too.
963    
964    * There seems to be one serious bug in mltree-gen.sml.  It appears, though,
965      as if there currently is no execution path that could trigger it in
966      SML/NJ.  (The assumptions underlying functions arith and promotable do not
967      hold for things like multiplication and division.)
968    
969    ----------------------------------------------------------------------
970    Name: Matthias Blume
971    Date: 2002/03/27 16:27:00 EST
972    Tag: blume-20020327-mlrisc-divisions
973    Description:
974    
975    Added support for all four division operations (ML's div, mod, quot,
976    and rem) to MLRISC.  In the course of doing so, I also rationalized
977    the naming (no more annoying switch-around of DIV and QUOT), by
978    parameterizing the operation by div_rounding_mode (which can be either
979    DIV_TO_ZERO or DIV_TO_NEGINF).
980    
981    The generic MLTreeGen functor takes care of compiling all four
982    operations down to only round-to-zero div.
983    
984    Missing pieces:
985    
986      * Doing something smarter than relying on MLTreeGen on architectures
987        like, e.g., the x86 where hardware division delivers both quotient and
988        remainder at the same time.  With this, the implementation of the
989        round-to-neginf operations could be further streamlined.
990    
991      * Remove inlining support for div/mod/rem from the frontend and replace it
992        with primops that get carried through to the backend.  Do this for all
993        int and word types.
994    
995    ----------------------------------------------------------------------
996    Name: Matthias Blume
997    Date: 2002/03/25 17:25:00 EST
998    Tag: blume-20020325-divmod
999    Description:
1000    
1001    I improved (hopefully without breaking them) the implementation of Int.div,
1002    Int.mod, and Int.rem.   For this, the code in translate.sml now takes
1003    advantage of the following observations:
1004    
1005      Let  q = x quot y      r = x rem y
1006           d = x div  y      m = x mod y
1007    
1008    where "quot" is the round-to-zero version of integer division that
1009    hardware usually provides.  Then we have:
1010    
1011         r = x - q * y        where neither the * nor the - will overflow
1012         d = if q >= 0 orelse x = q * y then q else q - 1
1013                              where neither the * nor the - will overflow
1014         m = if q >= 0 orelse r = 0 then r else r + y
1015                              where the + will not overflow
1016    
1017    This results in substantial simplification of the generated code.
1018    The following table shows the number of CFG nodes and edges generated
1019    for
1020            fun f (x, y) = x OPER y
1021            (* with OPER \in div, mod, quot, rem *)
1022    
1023    
1024        OPER | nodes(old) | edges(old) | nodes(new) | edges(new)
1025        --------------------------------------------------------
1026         div |         24 |         39 |         12 |         16
1027         mod |         41 |         71 |         12 |         16
1028        quot |          8 |         10 |          8 |         10
1029         rem |         10 |         14 |          8 |         10
1030    
1031    
1032    ----------------------------------------------------------------------
1033  Name: Matthias Blume  Name: Matthias Blume
1034  Date: 2002/03/25 22:06:00 EST  Date: 2002/03/25 22:06:00 EST
1035  Tag: blume-20020325-cprotobug  Tag: blume-20020325-cprotobug

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