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

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revision 1175, Mon Mar 25 03:38:44 2002 UTC revision 1682, Tue Nov 9 23:48:09 2004 UTC
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13  Description:  Description:
14    
15  ----------------------------------------------------------------------  ----------------------------------------------------------------------
16    Name: Matthias Blume (blume (at) tti - c (dot) org)
17    Date: 2004/11/09 17:50:00 CST
18    Tag: blume-20041109-64bit
19    Description:
20    
21    Started adding some infrastructure for supporting 64-bit int- and
22    word-types.  (Still in its very early stages.)
23    
24    ----------------------------------------------------------------------
25    Name: Matthias Blume (blume (at) tti - c (dot) org)
26    Date: 2004/10/28 10:45:00 CDT
27    Tag: Release_110_50
28    Description:
29    
30    New working version (110.50).  NEW BOOTFILES!
31    
32                 =====================
33    
34    Also:
35    
36      - Changend config/srcarchiveurl from a file just
37        containing the URL string into a file containing
38        shell script code.  The code has access to the $VERSION variable.
39      - Made corresponding changes to config/install.sh and config/unpack.
40      - Default contents of config/srcarchiveurl uses $VERSION and
41        normally does not have to be edited to reflect a version change.
42    
43      (As a result, a version change can be done by just editing
44       config/version, the rest is now automatic.)
45    
46    ----------------------------------------------------------------------
47    Name: Matthias Blume (blume (at) tti - c (dot) org)
48    Date: 2004/10/27 17:50:00 CDT
49    Tag: blume-20041027-btrace-msg
50    Description:
51    
52    BackTrace.monitor now also reports the source of the exception that
53    triggered the trace.
54    
55    ----------------------------------------------------------------------
56    Name: Matthias Blume (blume (at) tti - c (dot) org)
57    Date: 2004/10/27 17:20:00 CDT
58    Tag: blume-20041027-x86-c-calls
59    Description:
60    
61    This is the HISTORY entry for two earlier commits, both concerning
62    the x86 c-calls code in MLRISC:
63    
64      - added a missing LOAD in the code that deals with struct arguments
65      - made sure the caller does not add the wrong number of bytes to the
66        stack pointer after a call of a function returning a struct
67        (the callee already pops the implicit argument which points to
68         the space reserved for the result)
69    
70    ----------------------------------------------------------------------
71    Name: Allen Leung (leunga (at) reservoir (dot) com)
72    Date: 2004/10/24 14:00:00 EST
73    Tag: leunga-20041024-x86-gas-fucomip
74    Description:
75    
76       John discovered a bug in the syntax of fucomip.
77       The opcodes FU?COMIP? have been changed to
78    
79           fu?comip? %st(i), %st
80    
81    ----------------------------------------------------------------------
82    Name: Matthias Blume (blume (at) tti - c (dot) org)
83    Date: 2004/10/20 15:06:00 CDT
84    Tag: blume-20041020-standalone-backtrace
85    Description:
86    
87    Added a mechanism for getting back-trace information from standalone
88    programs.  Here is how it works:
89    
90       1. The part of the program from which you want to get backtrace
91          information (usually the whole program) should be wrapped with
92          BackTrace.monitor.  This is a (unit->'a)->'a function, and your
93          main program could be modified from something like
94    
95             fun main (pgm, args) = ...
96    
97         to
98    
99            fun main (pgm, args) = BackTrace.monitor (fn () => ...)
100    
101       2. To be able to access BackTrace.monitor, you have to add
102          library $smlnj-tdp/plugins.cm to the .cm file that contains your
103          main function.
104    
105       3. Remove all compiled code (i.e., all the .cm/ subdirectories that
106          CM might have created in the past for your project).
107    
108       4. Build the system using this command line:
109    
110             ml-build -Ctdp.instrument=true \$smlnj-tdp/back-trace.cm \
111                      myprog.cm MyProg.main myprog
112    
113          instead of the usual
114    
115             ml-build myprog.cm MyProg.main myprog
116    
117    I changed a library name:
118    
119       $/trace-debug-profile.cm --> $smlnj-tdp/plugins.cm
120    
121    New libraries:
122    
123       $smlnj-tdp/back-trace.cm
124          -- when loaded causes the back-trace plugin to be installed
125       $smlnj-tdp/coverage.cm
126          -- when loaded causes the coverage plugin to be installed
127    
128    ----------------------------------------------------------------------
129    Name: Matthias Blume (blume (at) tti - c (dot) org)
130    Date: 2004/10/18 16:45:00 CDT
131    Tag: blume-20041018-groupowner
132    Description:
133    
134    Added an "obsolete" warning for the "group owner" syntax to CM's parser.
135    
136    Eliminated group owner specs from .cm files throughout the source tree.
137    
138    ----------------------------------------------------------------------
139    Name: Matthias Blume (blume (at) tti - c (dot) org)
140    Date: 2004/10/15 15:45:00 CDT
141    Tag: blume-20041015-coverage
142    Description:
143    
144    * Test coverage tool added!
145    * Further reorganization of tracing-, debugging-, and profiling support:
146    
147        - moved original BTImp -- now called BackTrace -- into a separate
148          library called $/trace-debug-profile.cm
149        - eliminated all mentions of BTrace from SMLofNJ.Internals
150        - only the instrumentation mechanism is now left in the compiler proper
151        - BackTrace module is a plugin which is NOT plugged in by default
152        - Coverage module is another such plugin
153    
154    To get the benefits of any of these plugin modules, the code in
155    question must be compiled with tdp instrumentation turned on.  This
156    can be done by setting SMLofNJ.Internals.TDP.mode to true.
157    (The ref cell is also controlled via the -Ctdp.instrument=... switch.)
158    
159    Plugins are selected at link time.  (Pre-compiled instrumented code
160    can be re-loaded with different plugins in effect.)  When an
161    instrumented module is linked, whatever plugins are at that time
162    enabled will come into effect for that module.
163    
164    To enable the back-trace plugin, load library $/trace-debug-profile.cm
165    and invoke BackTrace.install() (e.g., from the interactive prompt).
166    To enable the coverage plugin, load the same library and invoke
167    Coverage.install().
168    
169    Back-traces are generated automatically on uncaught exceptions and
170    when the code in question explicitly invokes BackTrace.trigger().
171    
172    Coverage (and execution frequency-) information must be queried
173    explicitly by calling Coverage.not_covered and Coverage.hot_spots.
174    
175    ----------------------------------------------------------------------
176    Name: Matthias Blume (blume (at) tti - c (dot) org)
177    Date: 2004/10/14 17:40:00 CDT
178    Tag: blume-20041014-tdp-core
179    Description:
180    
181    Snapshot of a significant overhaul of how the trace/debug/profile support
182    is hooked into the system (specifically: Core and SMLofNJ.Internals).
183    
184    ----------------------------------------------------------------------
185    Name: Matthias Blume (blume (at) tti - c (dot) org)
186    Date: 2004/10/13 16:34:00 CDT
187    Tag: blume-20041013-tdp
188    Description:
189    
190    Some rationalization of names:
191    
192       structure BTrace -> structure TDPInstrument
193       etc.
194    
195    This is is preparation of using the original back-trace
196    instrumentation for other purposes.  "TDP" stands for
197    Trace/Debug/Profile.
198    
199    The control flag controlling whether instrumentation is on or off is now
200    registered under a different name, so instead of running sml as
201    
202     sml -Cinstrument.btrace-mode=true
203    
204    one has to say
205    
206     sml -Ctdp.instrument=true
207    
208    ----------------------------------------------------------------------
209    Name: Matthias Blume (blume (at) tti - c (dot) org)
210    Date: 2004/10/11 16:37:00 CDT
211    Tag: blume-20041011-regions
212    Description:
213    
214    Made some minor modifications to elabcore.sml to have source regions
215    be propagated more tightly -- resulting in better (i.e., smaller)
216    regions being reported in error- and debug messages.
217    
218    ----------------------------------------------------------------------
219    Name: Matthias Blume (blume (at) tti - c (dot) org)
220    Date: 2004/10/08 22:50:00 CDT
221    Tag: blume-20041008-cmkw
222    Description:
223    
224    Fixed handling of keywords in .cm files: After seeing "is" the lexer
225    treats subsequent occurrences of "group", "library", "source", "is",
226    "*", and "-" as ordinary identifiers rather than keywords.
227    
228    Most seriously, this fixes a problem with CM's "shell" tool.  The tool
229    is supposed to accept a tool argument called "source", but this did
230    not work because of the clash with the keyword.
231    
232    ----------------------------------------------------------------------
233    Name: Matthias Blume (blume (at) tti - c (dot) org)
234    Date: 2004/10/07 16:00:00 CDT
235    Tag: blume-20041007-cleanup
236    Description:
237    
238    Assorted cleanup work:
239    
240      - got rid of intstrmap in favor of using the library's
241        hash table implementation
242      - threw out most of the pathnames stuff, as it was not used anyway
243      - simplified tokentable implementation
244      - fixed some minor spelling errors
245    
246    ----------------------------------------------------------------------
247    Name: Matthias Blume (blume (at) tti - c (dot) org)
248    Date: 2004/10/06 15:15:15 CDT
249    Tag: blume-20041006-handler
250    Description:
251    
252    Cleaned up the absyn to reflect the invariant that HANDLE always
253    carries a FNexp as part of the type definition.  This eliminates some
254    superfluous sanity checks at runtime down the road.
255    
256    Some minor cleanup of the btrace code.
257    
258    ----------------------------------------------------------------------
259    Name: Matthias Blume (blume (at) tti - c (dot) org)
260    Date: 2004/10/01 10:20:30 CDT
261    Tag: blume-20041001-slave
262    Description:
263    
264    Added hack to make slave mode work in the presence of the version
265    tool.  (Still, since the master does two passes over the code for
266    CMB.make, the release number gets bumped twice when slaves are
267    attached.  I don't know if this is worth fixing...)
268    
269    ----------------------------------------------------------------------
270    Name: Matthias Blume (blume (at) tti - c (dot) org)
271    Date: 2004/09/30 10:55:00 CDT
272    Tag: blume-20040930-version
273    Description:
274    
275    * Moved the "version" magic into its own little library under
276      src/system/smlnj/internal.  This avoids expensive reconstruction of
277      a stable src/compiler/core.cm.
278    
279    * At the same time, structure CompilerVersion is now known as
280      structure SMLNJVersion.
281    
282    * Arranged for the version tool to NOT kick in when rebuilding the system
283      (makeml -rebuild, fixpt).  Otherwise one would never reach a fixpoint.
284      Also, loading the versiontool does not work when rebuilding the system
285      because CM is not properly initialized at that time.
286    
287    ----------------------------------------------------------------------
288    Name: Matthias Blume (blume (at) tti - c (dot) org)
289    Date: 2004/09/29 14:00:00 CDT
290    Tag: blume-20040929-autoversion
291    Description:
292    
293    Implemented some CM magic to have
294        file src/compiler/TopLevel/main/version.sml
295    generated automagically.
296    The version is taken from two files: config/version and config/release.
297    The first is expected to contain a two-part version number such as 110.49.
298    The second should contain a single number, but it may be missing.
299    
300    If the environment variable VERSIONTOOL_BUMP_RELEASE is defined at the
301    time the version tool is loaded (which is the first time you say CMB.make),
302    then the tool will increment the value stored in config/release every
303    time CMB.make is invoked.
304    
305    The binfile format is now insensitive to anything beyond the first
306    two components of a version number, so bumping the release does not render
307    binfiles incompatible.  Auto-bumping can be used to keep track of versions
308    during development without invalidating existing binfiles.
309    
310    In any case, every CMB.make updates the date information in version.sml.
311    (This is the date that is printed in the banner.)
312    
313    ----------------------------------------------------------------------
314    Name: Matthias Blume (blume (at) tti - c (dot) org)
315    Date: 2004/09/28 10:53:00 CDT
316    Tag: blume-20040928-controls
317    Description:
318    
319    Some cleanup of the controls code.
320    
321    ----------------------------------------------------------------------
322    Name: Matthias Blume (blume (at) tti - c (dot) org)
323    Date: 2004/09/27 22:08:00 CDT
324    Tag: blume-20040927-controls
325    Description:
326    
327    Added two pieces of functionality to the Controls interface:
328    
329    1.   val save'restore: 'a control -> unit -> unit
330    
331       grabs the current value of the control in stage 1 and restores it
332       in stage 2.
333    
334    2.   val set' : 'a control * 'a -> unit -> unit
335    
336       stores the given value into the control in stage 2 (i.e., delayed)
337       but does all error checking in stage 1.
338       (This is for string controls that need to do parse their argument --
339        something that might fail.  In some cases, notably in CM, one
340        already knows the intended argument but wants to delay the actual
341        assignment until a time when error recovery would be more difficult.)
342    
343    Changed the handling of controls in tool arguments to classes "sml" and
344    "lazysml":
345       - use Controls.save'restore as a more robust way of restoring the
346         old value (in particular: without having to re-parse the string)
347       - use controls to handle the "overload" keyword in the init group
348         (I believe this change actually fixes a long-standing obscure bug.)
349    
350    ----------------------------------------------------------------------
351    Name: Matthias Blume (blume (at) tti - c (dot) org)
352    Date: 2004/09/27 17:00:00 CDT
353    Tag: blume-20040927-lazysml
354    Description:
355    
356    Added a new tool class called "lazysml" to CM's tool chest.  The only
357    difference to "sml" is that compilation is done with Control.lazysml
358    set to true.  A source of class "lazysml" is automatically recognized
359    by a file name suffix of ".lml".
360    
361    In addition to the above feature, the original class "sml" now also
362    supports a tool argument "lazy" which has the same effect.  As a
363    result, the following three lines are equivalent:
364    
365        foo.sml : lazysml
366        foo.sml : sml (lazy)
367        foo.sml (lazy)
368    
369    The setting goes into effect both during parsing and during
370    compilation.  The original setting is restored right after parsing and
371    after compilation, respectively.
372    
373    In addition to all the above, there is also a general mechanism to set
374    ANY of the "controls" that are available at the command line via
375    "-C..." on a per-sml-file basis.  The same rules that apply for "lazy"
376    apply as well. (In fact, "lazy" is implemented as a special case of
377    the general mechanism.)
378    
379    The .cm file syntax uses a new keyword tool argument called "with".
380    There are several ways of indicating the desired settings:
381    
382        foo.sml (with:parser.quotations=true)
383        foo.sml (with:(name:parser.quotations value:true))
384        foo.sml (with:(name:name1 value:value1 name:name2 value:value2 ...))
385        foo.sml (with:(name1=value1 name2=value2 ...))
386        foo.sml (with:(name1=value1 name:name2 value:value2 name3=value3 ...))
387    
388        etc.
389    
390    Another possible abbreviation is to leave out the =v or value:v part
391    if the name refers to a boolean control (in which case the value is
392    taken to be true).  Thus, one could get lazy sml also by saying:
393    
394        foo.sml (with:parser.lazy-keyword=true)
395        foo.sml (with:parser.lazy-keyword)
396        foo.sml (with:(name:parser.lazy-keyword value:true))
397        foo.sml (with:(name:parser.lazy-keyword))
398    
399    ----------------------------------------------------------------------
400    Name: Matthias Blume (blume (at) tti - c (dot) org)
401    Date: 2004/09/24 16:22:00 CDT
402    Tag: blume-20040924-ppc-long-branch
403    Description:
404    
405    Turned message about "emiting long form of branch" off by default.
406    Added a control flag to turn it back on when desired.
407    
408    ----------------------------------------------------------------------
409    Name: Matthias Blume (blume (at) tti - c (dot) org)
410    Date: 2004/09/24 16:05:00 CDT
411    Tag: blume-20040924-rounding
412    Description:
413    
414    Applied patch for setting rounding modes under Mac OS X.  Thanks to
415    Melissa O'Neill for providing the code!
416    
417    ----------------------------------------------------------------------
418    Name: Matthias Blume (blume (at) tti - c (dot) org)
419    Date: 2004/09/23 17:30:00 CDT
420    Tag: blume-20040923-envvars
421    Description:
422    
423    1. Changed definition of type ControlRegistry.registry_tree to
424       include control_info (i.e., the name of the controlling environment
425       variable).
426    
427    2. Added command-line flags -e and -E to print the names of environment
428       variables that can be used to control internal settings.
429       (This uses the new API mentioned in 1.)
430    
431    ----------------------------------------------------------------------
432    Name: Matthias Blume (blume (at) tti - c (dot) org)
433    Date: 2004/09/13 16:50:00 CDT
434    Tag: Release_110_49
435    Description:
436    
437    New working version (110.49).  NEW BOOTFILES!
438    
439    ----------------------------------------------------------------------
440    Name: Matthias Blume
441    Date: 2004/09/13 16:20:00 CDT
442    Tag: blume-20040913-config-mlrisc
443    Description:
444    
445    Put target "mlrisc" back into the default list.
446    (There is no harm in having it, and some users have expressed their
447    wish to have "mlrisc" included by default.)
448    
449    ----------------------------------------------------------------------
450    Name: John Reppy
451    Date: 2004/09/13
452    Tag: jhr-20040913-signals
453    Description:
454    
455    Fixed the signal masking code to properly nest mask/unmask operations
456    on a per-signal basis.
457    
458    ----------------------------------------------------------------------
459    Name: Matthias Blume (blume (at) tti - c (dot) org)
460    Date: 2004/09/08 13:20:00 CDT
461    Tag: blume-20040908-heap-magic
462    Description:
463    
464    Bumped the heap macig number to 0x09082004 to account for the changed
465    layout of the ML frame under MacOS X.
466    
467    ----------------------------------------------------------------------
468    Name: Allen Leung (leunga (at) reservoir (dot) com)
469    Date: 2004/09/03 11:26:00 EST
470    Tag: leunga-20040903-cygwin-install
471    Description:
472    
473       Added a patch to _arch-n-opsys to enable the Cygwin runtime.
474    The Cygwin runtime is turned on by setting the environment
475    variable SMLNJ_CYGWIN_RUNTIME to 1.
476    
477    ----------------------------------------------------------------------
478    Name: Matthias Blume (blume (at) tti - c (dot) org)
479    Date: 2004/08/31 17:15:00 CDT
480    Tag: blume-20040831-core
481    Description:
482    
483    Added some exports to src/compiler/core.cm upon request by J. Joemann.
484    
485    ----------------------------------------------------------------------
486    Name: Matthias Blume (blume (at) tti - c (dot) org)
487    Date: 2004/08/30 17:55:00 CDT
488    Tag: blume-20040830-installer
489    Description:
490    
491    Upon request by Johannes Joemann:
492    
493    - improved ML code of installer to fall back to coping when renaming
494      fails (i.e., when source and target are on different file systems);
495      the code compiles but has yet to be tested in anger
496    - removed mlrisc from list of default targets (config/targets)
497    
498    ----------------------------------------------------------------------
499    Name: Matthias Blume (blume (at) tti - c (dot) org)
500    Date: 2004/08/27 17:20:00 CDT
501    Tag: blume-20040827-ptreql
502    Description:
503    
504    Added ptreql primop to structure InlineT (upon request from Larry
505    Paulson).
506    
507    ----------------------------------------------------------------------
508    Name: Allen Leung (leunga (at) reservoir (dot) com)
509    Date: 2004/08/15 21:21:00 EST
510    Tag: leunga-110_48-udgraph
511    Description:
512    
513    Another bug fix from Carl Hauser:
514    
515    diff /net/niflab/smlnj48/src/MLRISC/graphs/udgraph.sml udgraph.sml
516    > 48c48
517    > <              | rmv((e as (k,_))::es,L) = rmv(es,if k = i then es else
518    > e::L)
519    > ---
520    > >              | rmv((e as (k,_))::es,L) = rmv(es,if k = i then L else e::L)
521    > Without this, any deletion of an edge in an undirected graph does severe
522    > violence to the graph.
523    
524    ----------------------------------------------------------------------
525    Name: Allen Leung (leunga (at) reservoir (dot) com)
526    Date: 2004/08/10 23:35:00 EST
527    Tag: leunga-110_48-ppc
528    Description:
529    
530       The IBM/MacOS syntax switch on PPC was incorrectly swapped.
531    
532    ----------------------------------------------------------------------
533    Name: Matthias Blume (blume (at) tti - c (dot) org)
534    Date: 2004/08/10 12:00:00 CDT
535    Tag: Release_110_48
536    Description:
537    
538    New working version (110.48).  NEW BOOTFILES!
539    
540    ----------------------------------------------------------------------
541    Name: Allen Leung (leunga (at) reservoir (dot) com)
542    Date: 2004/08/09 12:21:00 EST
543    Tag: leunga-110_47-dijsktra
544    Description:
545    
546    Bug fix from Carl Hauser:
547    
548    single_source_shortest_paths in dijkstra.sml was observed to get wrong
549    answers (by comparing to single_source_shortest_paths in bellman-ford.sml).
550    
551    The problem is that following the expression A.update(dist,s,Num.zero)
552    it is necessary to update the priority queue using Q.decreaseWeight(Q,s).
553    
554    ----------------------------------------------------------------------
555    Name: Matthias Blume (blume (at) tti - c (dot) org)
556    Date: 2004/08/06 18:10:00 CDT
557    Tag: blume-20040806-cmdline
558    Description:
559    
560    Fiddled with handling of command-line options:
561    
562      * sml now quits after processing the command line
563        if -H, -S, -h<n>, or -s<n> appears as the last
564        command-line argument
565      * a new option -q terminates the session when encountered on
566        the command line; subsequent arguments will be ignored
567      * bug fixes: short (erroneous) arguments are no longer ignored
568        completely
569    
570    ----------------------------------------------------------------------
571    Name: Allen Leung (leunga (at) reservoir (dot) com)
572    Date: 2004/08/04 18:17:00 EST
573    Tag: leunga-110_47-ppc-ibm-asm
574    Description:
575    
576      - Added minimal IBM assembly syntax support for PowerPC.
577    
578      - Cygwin: manually changed the file cygwin.def.  Some exported symbols have
579        been altered in the runtime.  We need an automatic way to keep the file
580        in sync.
581    
582    ----------------------------------------------------------------------
583    Name: Matthias Blume (blume (at) tti - c (dot) org)
584    Date: 2004/08/04 14:00:00 CDT
585    Tag: Release_110_47
586    Description:
587    
588    New working version (110.47).  NEW BOOTFILES!
589    
590    ----------------------------------------------------------------------
591    Name: Matthias Blume (blume (at) tti - c (dot) org)
592    Date: 2004/08/03 14:25:00 CDT
593    Tag: blume-20040803-callingconv
594    Description:
595    
596    Added low-level support for choosing C calling conventions by
597    twiddling the type of rawccall.  (See
598    src/compiler/Semant/types/cproto.sml for details.)
599    
600    ----------------------------------------------------------------------
601    Name: Matthias Blume (blume (at) tti - c (dot) org)
602    Date: 2004/08/02 15:55:00 CDT
603    Tag: blume-20040802-backout
604    Description:
605    
606    Backed out of change to win32-filesys.c.  The earlier patch to
607    get_file_time caused CM to produce files with the wrong time stamp.
608    
609    ----------------------------------------------------------------------
610    Name: Matthias Blume (blume (at) tti - c (dot) org)
611    Date: 2004/08/02 14:45:00 CDT
612    Tag: blume-20040802-nlffi-win32
613    Description:
614    
615    Added NLFFI support for Win32, adapted from a patch provided by David
616    Hansel.  This is currently completely untested.  Also, the issue
617    concerning stdcall vs. ccall is still unresolved.
618    
619    ----------------------------------------------------------------------
620    Name: Matthias Blume (blume (at) tti - c (dot) org)
621    Date: 2004/07/30 17:55:00 CDT
622    Tag: blume-20040730-various
623    Description:
624    
625    Gearing up towards 110.47...
626    
627    - various minor bugfixes to ml-nlffigen
628    - a beginning of a manual for nlffi
629    
630    - eliminated 'export name=value' in config/install.sh as this does
631      not work with certain versions of /bin/sh
632      (Thanks to David King at Motorola for catching this.)
633    
634    - several bugfixes provided or suggested by David Hansel at Reactive Systems:
635      - added a test for tm==NULL to gmtime.c and localtime.c
636      - applied patch for incorrect GetFileTime under win32
637      - toSeconds -> toMilliseconds in Win32/win32-process.sml
638    
639    ----------------------------------------------------------------------
640    Name: Matthias Blume (blume (at) tti - c (dot) org)
641    Date: 2004/07/21 18:20:00 CDT
642    Tag: blume-20040721-nlffigen
643    Description:
644    
645    - Fixed minor issue in ml-nlffigen: Now generate structure T_foo
646      for a typedef to an incomplete type, but leave out the "typ" member.
647      (This is just for consistency.)
648    - Started to produce what is supposed to become better (i.e., comprehensive)
649      documentation of what ml-nlffigen does and produces.
650    
651    ----------------------------------------------------------------------
652    Name: Matthias Blume (blume (at) tti - c (dot) org)
653    Date: 2004/07/14 16:25:00 CDT
654    Tag: blume-20040714-union
655    Description:
656    
657    Added C_UNION to c-calls/c-types.sml and updated the machinery
658    (ml-nlffigen, cproto.sml) that conveys C function interface
659    information to the code generator.
660    
661    However, the actual architecture-specific implementation of function
662    arguments and results that are C unions is still not implemented.
663    
664    ----------------------------------------------------------------------
665    Name: Allen Leung (leunga (at) reservoir (dot) com)
666    Date: 2004/07/14 14:38:00 EST
667    Tag: leunga-110_46_1-ppc-lwzu
668    Description:
669    
670        Added these instructions to the PowerPC architecture:
671        LBZU(X), LHZU(X), LWZU(X),
672        STWU(X), STFDU, STFSU
673    
674        etc...
675    
676        Note: I haven't added their instruction encoding into the description.
677    
678    ----------------------------------------------------------------------
679    Name: Allen Leung (leunga (at) reservoir (dot) com)
680    Date: 2004/07/13 15:04:00 EST
681    Tag: leunga-110_46_1-ppc-lwarx
682    Description:
683    
684       Added the two instructions LWARX and STWCX to the PowerPC
685    instruction set.
686    
687       A (untested) rewrite of loop-structure.sml.  The old version
688    is completely broken.
689    
690    ----------------------------------------------------------------------
691    Name: Matthias Blume (blume (at) tti - c (dot) org)
692    Date: 2004/07/13 13:50:00 CDT
693    Tag: blume-20040713-nlffi
694    Description:
695    
696    - use paramAlloc to report c-calls with too many arguments
697      (for PPC version where parameter area is pre-allocated)
698    - added ccall_maxargspace to machspec (to implement the above)
699    - made "make" commend in CM's "make" tool configurable
700    - added option (default: on) for passing the name of the SML/NJ's "bin"
701      directory to "make"; the call looks like this:
702    
703         make <options> SMLNJ_BINDIR=<dir> <target>
704    
705      This can be used by the Makefile to, e.g., pick the "right" version
706      of ml-nlffigen.
707    - minor code tweaks
708    
709    ----------------------------------------------------------------------
710    Name: Matthias Blume (blume (at) tti - c (dot) org)
711    Date: 2004/07/12 22:50:00 CDT
712    Tag: blume-110_46_1-macosx-nlffi
713    Description:
714    
715    NLFFI under Mac OS X now working (sort of).  This is largely untested,
716    though.
717    
718    Note:  1. You have to make a new, clean build of the runtime system.
719           2. There are new BOOTFILES, you have to use them!
720              (Doing the bootstrap process yourself would be *very* painful!
721               If you absolutely have to do it, build the system under
722               a different architecture and then cross-compile.)
723    
724    Version bumped to 110.46.1 to account for runtime data format changes.
725    
726    ----------------------------------------------------------------------
727    Name: Matthias Blume (blume (at) tti - c (dot) org)
728    Date: 2004/06/18 14:30:00 CDT
729    Tag: blume-20040618-unix
730    Description:
731    
732    Changed the implementation of structure Unix so that the same stream
733    is returned every time one of the {text,bin}{In,Out}streamOf functions
734    is invoked on the same proc.  This is not what the spec currently
735    says -- although IMO it arguably should.  (See discussion below.)
736    
737    ----------------------------------------------------------------------
738    Name: Matthias Blume (blume (at) tti - c (dot) org)
739    Date: 2004/06/17 18:15:00 CDT
740    Tag: Release_110_46
741    Description:
742    
743    New working version (110.46).  NEW BOOTFILES!
744    
745    ----------------------------------------------------------------------
746    Name: Matthias Blume (blume (at) tti - c (dot) org)
747    Date: 2004/06/17 17:20:00 CDT
748    Tag: blume-20040617-timer-unix
749    Description:
750    
751    Changed the interface of structures Timer and Unix to match the most
752    recent Basis spec.
753    
754    In the case of Unix there still seems to be an open/weird issue:
755    
756       The {text,bin}{In,Out}streamOf functions are supposed to create
757       fresh streams whenever they are called -- as opposed to have them
758       return the same stream every time.  This design is supposed to
759       prevent space leaks caused by proc values hanging on to streams.
760    
761       The reap function, on the other hand, is supposed to close the
762       streams.  This cannot be done without having a handle on the
763       stream in proc after all...
764    
765    I took the liberty to implement the following stopgap solution:
766    
767      The proc value hangs on to the most recently created stream(s).
768      Reap closes those.  If either or both of the two streams hadn't
769      been created at all yet, then reap will close the corresponding
770      file descriptors directly.
771    
772    PS: I don't understand the original space leak argument anymore.  If
773    a proc hangs on to the imperative stream, then I/O operations on those
774    will advance the state of the cached stream and avoid the space leak.
775    
776    ----------------------------------------------------------------------
777    Name: Matthias Blume (blume (at) tti - c (dot) org)
778    Date: 2004/05/28 16:45:00 CDT
779    Tag: blume-20040528-basis
780    Description:
781    
782    Added signature PACK_REAL and exported functor PrimIO.
783    
784    ----------------------------------------------------------------------
785    Name: Matthias Blume (blume (at) tti - c (dot) org)
786    Date: 2004/05/25 16:00:00 CDT
787    Tag: blume-20040525-group-owner
788    Description:
789    
790    CM now ignores (but still accepts) the "owner" information in group
791    descriptions.  The owner of a group is its next enclosing
792    library. Each group must have a unique owner.  (There is a virtual
793    "toplevel" library that owns groups which are not nested within a real
794    library.)  Previously, each group had to explicitly declare its owner,
795    and CM would check that such a declaration is correct.  The new scheme
796    is to have CM check that for each group there is precisely one owning
797    library.
798    
799    The advantage of the new scheme is that the programmer no longer needs
800    to maintain the somewhat annoying owner information.  The downside is
801    that CM cannot enforce the ownership rule across multiple runs of
802    CM.make.  Fortunately, enclosing the same group in two different
803    libraries A and B which are not part of the same program does not
804    cause real problems.
805    
806    ----------------------------------------------------------------------
807    Name: Matthias Blume (blume (at) tti - c (dot) org)
808    Date: 2004/05/20 16:00:00 CDT
809    Tag: blume-20040520-win32
810    Description:
811    
812    Made the win32 version work again.  (Strangely, a misplaced comma had
813    slipped into win32-process.c which prevented the runtime from being
814    compiled correctly.)
815    
816    Also, included a minor addition to ml-build.bat analogous to what was
817    done in blume-20040519-ml-build.
818    
819    ----------------------------------------------------------------------
820    Name: Matthias Blume (blume (at) tti - c (dot) org)
821    Date: 2004/05/19 22:10:00 CDT
822    Tag: blume-20040519-ml-build
823    Description:
824    
825    Arranged for ml-build to clean up after itself a little bit better.
826    The script generates a temporary SML source file and compiles it using
827    CM, so CM generates metadata (GUID, SKEL, objectfile) for it.  It now
828    gets rid of those at the end, so they don't accumulate under .cm.
829    
830    This required a minor change to install.sh because the name of the
831    metadata directory (default: .cm) is actually configurable at
832    installation time.
833    
834    ----------------------------------------------------------------------
835    Name: Matthias Blume (blume (at) tti - c (dot) org)
836    Date: 2004/05/18 15:50:00 CDT
837    Tag: blume-20040518-mkreader
838    Description:
839    
840    Added Posix.IO.mk{Bin,Text}{Reader,Writer} by lifting their respective
841    implementations from internal modules PosixBinPrimIO and PosixTextPrimIO.
842    
843    ----------------------------------------------------------------------
844    Name: Matthias Blume (blume (at) tti - c (dot) org)
845    Date: 2004/05/11 14:35:00 CDT
846    Tag: blume-20040511-win32sock
847    Description:
848    
849    Added previously missing support for many socket-related functions
850    under win32.  Thanks to David Hansel <hansel@reactive-systems.com>
851    for the voluminous patch!
852    
853    (I have not tested this patch under win32 yet.)
854    
855    Here is David's e-mail:
856    
857    Hi,
858    
859    Attached to this email you find a diff against sml/nj 110.45
860    that will enable socket support under Windows.
861    
862    To apply the patch (using unix or cygwin)
863    1) gunzip runtime.diff.gz
864    2) "cd" into "src/runtime" in the source tree of a fresh
865       110.45 installation.
866    3) patch -p 1 < [your/path/to]runtime.diff
867    
868    The code compiles fine but has NOT yet been extensively tested.
869    I only ran a few tests for basic socket client functionality
870    (which worked fine).  Especially the functions that use ioctl
871    are not tested at all and might not work (see below).
872    
873    I implemented this since we want to move to a newer version of sml/nj
874    but need socket support in order to use it.  This is the first time I
875    even had a look at the sml/nj source,  so please review my changes
876    before making this part of the distribution!  Here are a few issues
877    that I think might be better for someone to solve who is more
878    familiar with the sml/nj source (and socket programming):
879    
880    - getnetbyaddr.c and getnetbyname.c will raise a "not implemented"
881      exception since I could not figure out what the windows equivalent
882      of these functions is
883    
884    - In sockets-osdep.h there are a some #include statements that are
885      only used in a few files that include sockets-osdep.h
886    
887    - In smlnj-sock-lib.c, function init_fn() calls WSAStartup() but
888      does not process its return value since I don't know how to
889      report an error upwards.
890    
891    - It would probably be good to have a call to WSACleanup() when
892      the library is unloaded (if there is such a possibility).
893      Otherwise I think Windows will take care of this automatically
894      when the process finishes.
895    
896    - I used ioctlsocket() as a replacement for ioctl() but I have
897      no idea if that is actually the proper replacement on Windows.
898    
899    - All these issues are marked in the code by "FIXME" comments.
900    
901    We use sml/nj extensively in our products and are quite happy
902    with it.  I hope this contribution will help you.
903    
904    Keep up the good work!
905    
906    David
907    
908    ----------------------------------------------------------------------
909    Name: Matthias Blume (blume (at) tti - c (dot) org)
910    Date: 2004/05/11 14:20:00 CDT
911    Tag: blume-20040511-installml
912    Description:
913    
914    Fixed two bugs in installml script.  (Thanks to Vesa A. Norrman for
915    the patch.)
916    
917    ----------------------------------------------------------------------
918    Name: Matthias Blume (blume (at) tti - c (dot) org)
919    Date: 2004/05/11 14:05:00 CDT
920    Tag: blume-20040511-nlffi-netbsd
921    Description:
922    
923    Added support for nlffi under netbsd.  (Thanks to Vesa A. Norrman for
924    the patch.)
925    
926    ----------------------------------------------------------------------
927    Name: Matthias Blume (blume (at) tti - c (dot) org)
928    Date: 2004/05/11 12:05:00 CDT
929    Tag: blume-20040511-exports
930    Description:
931    
932    As per request by Adam Chlipala <adam@hcoop.net>, extended various
933    export lists in compiler-related .cm-files.
934    
935    ----------------------------------------------------------------------
936    Name: Matthias Blume (blume (at) tti - c (dot) org)
937    Date: 2004/05/11 11:35:00 CDT
938    Tag: blume-20040511-allsource
939    Description:
940    
941    The installer now honors the "src-smlnj" target again, although its meaning
942    has changed from "all sources required for the compiler" to "all sources
943    the installer knows about".  In other words, if you enable "src-smlnj"
944    in the "targets" file, then the installer will pull in sources for
945    everything.  (Notice that this refers to source code only.  Compiled
946    code is still only installed for modules that were requested explicitly
947    or which are required for other modules that were requested explicitly.)
948    
949    ----------------------------------------------------------------------
950    Name: Matthias Blume (blume (at) tti - c (dot) org)
951    Date: 2004/04/23 17:40:00 CDT
952    Tag: blume-20040423-ieee-scan
953    Description:
954    
955    Fixed IEEEReal.scan (and .fromString) so that if there is an overflow
956    in the exponent calculation we get INF or ZERO (depending on the mantissa
957    and the sign of the exponent).
958    
959    ----------------------------------------------------------------------
960    Name: Matthias Blume (blume (at) tti - c (dot) org)
961    Date: 2004/04/23 10:40:00 CDT
962    Tag: blume-20040423-ml-build
963    Description:
964    
965    The ml-build script now terminates with a non-0 status when something
966    goes wrong.
967    
968    ----------------------------------------------------------------------
969    Name: Matthias Blume (blume (at) tti - c (dot) org)
970    Date: 2004/04/22 16:35:00 CDT
971    Tag: blume-20040422-Option
972    Description:
973    
974    Made exception Option to be the same as exception Option.Option
975    (as it should be).
976    
977    ----------------------------------------------------------------------
978    Name: Allen Leung (leunga (at) reservoir (dot) com)
979    Date: 2004/03/19 14:40:00 EST
980    Tag: leunga-20040319-cygwin-nlffi
981    Description:
982    
983    Fixed the runtime so that ml-nlffi-lib runs on the cygwin version
984    of SML/NJ.  The problem is that
985    
986       lib = dlopen(NULL, ...)
987       f   = dlsym(lib, "malloc");
988    
989    does not work on Windows unless we explicitly export symbols
990    such as 'malloc' during linking.  We fixed this by explicitly
991    exporting the required symbols with the magic gcc incantation:
992    
993        -Wl,--export-all cygwin.def
994    
995    where cygwin.def is a file containing all the symbols that
996    we wish to export.
997    
998    I suspect this is a Windows problem and we'll have to
999    do the same (somehow with windows compilers) when
1000    we build the native win32 version with the system
1001    calls LoadLibrary/GetProcAddress.
1002    
1003    ----------------------------------------------------------------------
1004    Name: Matthias Blume (blume (at) tti - c (dot) org)
1005    Date: 2004/03/04 16:35:00 CST
1006    Tag: blume-20040304-intinf-fmt
1007    Description:
1008    
1009    Fixed problem with IntInf.fmt (sign would show up on the right instead
1010    of on the left for BIN, OCT, and HEX).
1011    
1012    ----------------------------------------------------------------------
1013    Name: Matthias Blume (blume (at) tti - c (dot) org)
1014    Date: 2004/03/04 11:25:00 CST
1015    Tag: blume-20040304-symlinks
1016    Description:
1017    
1018    Fixed problem with installer script (unix only) where bin/ml-yacc and
1019    friends pointed (via symlinks) to absolute locations instead of just
1020    .run-sml.  This was reported by Vesa A Norrman.
1021    
1022    ----------------------------------------------------------------------
1023    Name: Matthias Blume (blume (at) tti - c (dot) org)
1024    Date: 2004/02/13 14:50:00 CST
1025    Tag: Release_110_45
1026    Description:
1027    
1028    New working version (110.45). New bootfiles.
1029    
1030    ----------------------------------------------------------------------
1031    Name: Matthias Blume (blume (at) tti - c (dot) org)
1032    Date: 2004/01/26 15:15:15 CST
1033    Tag: blume-20040126-toplevel
1034    Description:
1035    
1036    Improved handling of exceptions at the interactive toplevel.
1037    
1038    ----------------------------------------------------------------------
1039    Name: Matthias Blume (blume (at) tti - c (dot) org)
1040    Date: 2004/01/26 11:25:00
1041    Tag: blume-20040126-app
1042    Description:
1043    
1044    Type of top-level "app" corrected.
1045    Added code for setting vp_limitPtrMask to Win32-specific runtime.
1046    
1047    ----------------------------------------------------------------------
1048    Name: Matthias Blume (blume (at) tti - c (dot) org)
1049    Date: 2003/11/18 17:10 CST
1050    Tag: blume-20031118-basis-fiddle
1051    Description:
1052    
1053    - changed Timer interface to what might become the spec
1054    - POSIX_FLAGS -> BIT_FLAGS according to spec
1055    - some other minor discrepancies wrt. spec eliminated
1056    
1057    ----------------------------------------------------------------------
1058    Name: Matthias Blume (blume (at) tti - c (dot) org)
1059    Date: 2003/11/06 12:00:00 CST
1060    Tag: Release_110_44
1061    Description:
1062    
1063    New working version (110.44). New bootfiles.
1064    
1065    ----------------------------------------------------------------------
1066    Name: Matthias Blume (blume (at) tti - c (dot) org)
1067    Date: 2003/11/04 11:50:00 CST
1068    Tag: blume-20031104-move-libraries
1069    Description:
1070    
1071    Eliminated the "dont_move_libraries" directive in config/targets.
1072    (The mechanism was broken and could not be fixed easily.  Moreover,
1073    there does not seem to be any reason not to move all libraries into
1074    lib during installation.  I originally implemented this directive as a
1075    backward-compatibility feature when I first introduced the new CM.
1076    Now that things have been stable for a long time and going back to the
1077    old CM is not an option, there is no reason to keep it around.)
1078    
1079    ----------------------------------------------------------------------
1080    Name: Matthias Blume (blume (at) tti - c (dot) org)
1081    Date: 2003/11/03 16:00:00 CST
1082    Tag: blume-20031103-installdir
1083    Description:
1084    
1085    Made installer honor INSTALLDIR variable again.  (Thanks to Chris
1086    Richards for pointing out the problem and providing the solution.)
1087    
1088    ----------------------------------------------------------------------
1089    Name: Matthias Blume (blume (at) tti - c (dot) org)
1090    Date: 2003/10/01 17:05:00 CDT
1091    Tag: blume-20031001-lal-mlrisc
1092    Description:
1093    
1094    MLRISC bug fix from Lal.
1095    
1096    ----------------------------------------------------------------------
1097    Name: Matthias Blume (blume (at) tti - c (dot) org)
1098    Date: 2003/09/30 16:10:00 CDT
1099    Tag: blume-20030930-primio-bat
1100    Description:
1101    
1102    1. Added openVector, nullRd, and nullWr to PRIM_IO.
1103    2. Improved .bat files (for Win32 port) to make things work under Win95.
1104       (thanks to Aaron S. Hawley for this one)
1105    
1106    ----------------------------------------------------------------------
1107    Name: Matthias Blume (blume (at) tti - c (dot) org)
1108    Date: 2003/09/26 16:05:00 CDT
1109    Tag: blume-20030926-wrappriv
1110    Description:
1111    
1112    Added missing wrapper for privilege "primitive" in $smlnj/viscomp/core.cm.
1113    
1114    ----------------------------------------------------------------------
1115    Name: Matthias Blume (blume (at) tti - c (dot) org)
1116    Date: 2003/09/26 15:00:00 CDT
1117    Tag: blume-20030926-110_43_3
1118    Description:
1119    
1120    - additional cleanup
1121    - version number bump, NEW BOOTFILES
1122    
1123    ----------------------------------------------------------------------
1124    Name: Matthias Blume (blume (at) tti - c (dot) org)
1125    Date: 2003/09/26 12:00:00 CDT
1126    Tag: blume-20030926-ppautoload
1127    Description:
1128    
1129    I modified the read-eval-print loop so that the autoloader gets
1130    invoked whenever the prettyprinter tries to look up a symbol that
1131    is not currently defined in the toplevel environment but which
1132    appears in CM's autoload registry.  As a result, we see far fewer of
1133    those ?.Foo.Bar.xxx names in the prettyprinter's output.
1134    
1135    In addition to this I tried to clean up some pieces of the Basis
1136    implementation (e.g., Socket, Word8Array) in order to prevent other
1137    instances of these ?.Foo.Bar.xxx names from being printed.
1138    
1139    The mechanism that picks names for types still needs some work, though.
1140    (Right now it seems that if there is a type A.t which is defined to
1141    be B.u, but B is unavailable at toplevel, then A.t gets printed as
1142    "?.B.u" although the perhaps more sensible solution would be to use
1143    "A.t" in this case.  In other words, the prettyprinter should follow
1144    a chain of DEFtycs not farther than there are corresponding toplevel
1145    names in the current environment.)
1146    
1147    ----------------------------------------------------------------------
1148    Name: Matthias Blume (blume (at) tti - c (dot) org)
1149    Date: 2003/09/24 16:31:00 CDT
1150    Tag: blume-20030924-installer
1151    Description:
1152    
1153    Another installer tweak:  All the ML code for the installer is now
1154    compiled during CMB.make and put into a little library called
1155    $smlnj/installer.cm.  The installation then simply invokes
1156    
1157       sml -m $smlnj/installer.cm
1158    
1159    and everything happens automagically.
1160    
1161    Win32:  ML code senses value of environment variable SMLNJ_HOME.
1162    Unix:   ML code senses values of environment variables ROOT, CONFIGDIR,
1163            and BINDIR.
1164    
1165    The new scheme guarantees that the ML code responsible for the installation
1166    is in sync with the APIs of the main system.  Also, the installer is
1167    somewhat faster because the installer script is precompiled.
1168    
1169    ----------------------------------------------------------------------
1170    Name: Matthias Blume (blume (at) tti - c (dot) org)
1171    Date: 2003/09/24 15:35:00 CDT
1172    Tag: blume-20030924-synsock
1173    Description:
1174    
1175    Added a signature SYNCHRONOUS_SOCKET to basis.cm.  This is like SOCKET
1176    but excludes all non-blocking operations.  Defined SOCKET (in Basis)
1177    and CML_SOCKET in terms of SYNCHRONOUS_SOCKET.  Removed superfluous
1178    implementations of non-blocking operations from CML's Socket
1179    structure.
1180    
1181    ----------------------------------------------------------------------
1182    Name: Matthias Blume (blume (at) tti - c (dot) org)
1183    Date: 2003/09/24 15:10:05 CDT
1184    Tag: blume-20030924-sockets
1185    Description:
1186    
1187    1. Fixed SOCKET API and implementation to match Basis spec.
1188       This required changing the internal representation of sockets to one
1189       that remembers (for each socket file descriptor) whether it is currently
1190       blocking or non-blocking.  This state is maintained lazily (i.e., a system
1191       call is made only if the state actually needs to change).
1192    
1193    2. OS-specific details of sockets were moved into separate files, thus
1194       making it possible to unify the bulk of the socket implementations
1195       between Unix and Win32.
1196    
1197    3. CML's socket API changed accordingly.
1198       (Note that we need to remove non-blocking functions from this API
1199       since they are redundant in the case of CML!)
1200    
1201    4. CML's socket implementation now makes use of non-blocking functions
1202       provided by Basis, thus removing all OS-dependent code from this part
1203       of CML.
1204    
1205    5. Changed Real64.precision from 52 to 53.  Minor cleanup in Real64 code.
1206    
1207    ----------------------------------------------------------------------
1208    Name: Matthias Blume (blume (at) tti - c (dot) org)
1209    Date: 2003/09/22 12:10:00 CDT
1210    Tag: blume-20030922-110_43_2
1211    Description:
1212    
1213    Made a new interim version and bootfiles for developer's bootstrapping
1214    convenience.
1215    
1216       110.43.2 -- NEW BOOTFILES
1217    
1218    ----------------------------------------------------------------------
1219    Name: Matthias Blume (blume (at) tti - c (dot) org)
1220    Date: 2003/09/19 15:55:00 CDT
1221    Tag: blume-20030919-cmdir
1222    Description:
1223    
1224    1. new-install.sh -> install.sh
1225    2. changed default CM "metadata" directory name to ".cm" (instead of "CM")
1226    3. tweaked installer so that another name instead of .cm can be chosen
1227       at install time (by setting the CM_DIR_ARC environment variable
1228       during installation); once installation is complete, the name is
1229       fixed
1230    
1231    ----------------------------------------------------------------------
1232    Name: Matthias Blume (blume (at) tti - c (dot) org)
1233    Date: 2003/09/18 16:00:00 CDT
1234    Tag: blume-20030918-110_43_1
1235    Description:
1236    
1237    Made a new interim version and bootfiles for developer's bootstrapping
1238    convenience.
1239    
1240       110.43.1 -- NEW BOOTFILES
1241    
1242    ----------------------------------------------------------------------
1243    Name: Matthias Blume (blume (at) tti - c (dot) org)
1244    Date: 2003/09/18 15:20:00 CDT
1245    Tag: blume-20030918-misc
1246    Description:
1247    
1248    1. Exported fractionsPerSecond etc. from TimeImp (but not from Time as
1249       this seems to be controversial at the moment) and used those in
1250       Posix.ProcEnv.times.
1251    
1252    2. Added Time.{from,to}Nanoseconds to Time.
1253    
1254    3. Improved Real.{from,to}LargeInt by avoiding needless calculations.
1255       For example, fromLargeInt never needs to look at more than 3 "big
1256       digits" to get its 53 bits of precision.
1257    
1258    ----------------------------------------------------------------------
1259    Name: Matthias Blume (blume (at) tti - c (dot) org)
1260    Date: 2003/09/17 16:30:00 CDT
1261    Tag: blume-20030917-real32-slices
1262    Description:
1263    
1264    Added an entry to the primitive environment
1265    (compiler/Semant/statenv/prim.sml) for int32->real64 conversion and
1266    added code to compiler/CodeGen/main/mlriscGen.sml to implement it.
1267    
1268    Removed some of the "magic" constants in real64.sml and replaced them
1269    with code that generates these values from their corresponding
1270    integer counterparts.
1271    
1272    Made all(?) the slice-related changes to the Basis and made everything
1273    compile again...
1274    
1275    ----------------------------------------------------------------------
1276    Name: Matthias Blume (blume (at) tti - c (dot) org)
1277    Date: 2003/09/15 17:45:00 CDT
1278    Tag: blume-20030915-rbase
1279    Description:
1280    
1281    Fixed bug in Real.fromLargeInt.
1282    
1283    ----------------------------------------------------------------------
1284    Name: Matthias Blume (blume (at) tti - c (dot) org)
1285    Date: 2003/09/13 18:11:00 CDT
1286    Tag: blume-20030913-libinstall
1287    Description:
1288    
1289    Minor bugfix in config/libinstall (set anchor with path to
1290    standalone tool after installing it, otherwise libraries that
1291    need ml-lex or ml-yacc won't compile the first time the installer
1292    runs).
1293    
1294    ----------------------------------------------------------------------
1295    Name: Matthias Blume (blume (at) tti - c (dot) org)
1296    Date: 2003/09/12 11:45:00 CDT
1297    Tag: blume-20030912-various
1298    Description:
1299    
1300     - fixed bug in Real.toLargeInt
1301     - fixed bug in Posix.ProcEnv.times
1302     - changed inputLine functions to return an option
1303     - minor installer improvements / bugfixes
1304     - changed default @SMLalloc parameter for x86/celeron to 64k
1305    
1306    ----------------------------------------------------------------------
1307    Name: Matthias Blume (blume (at) tti - c (dot) org)
1308    Date: 2003/09/09 22:00:00 CDT
1309    Tag: Release_110_43
1310    Description:
1311    
1312        New working release 110.43.  New bootfiles.
1313    
1314    ----------------------------------------------------------------------
1315    Name: Matthias Blume (blume (at) tti - c (dot) org)
1316    Date: 2003/09/09 19:20:00 CDT
1317    Tag: blume-20030909-installer
1318    Description:
1319    
1320    Rewrote large parts of config/install.sh in SML (config/libinstall.sml).
1321    Modified config/install.bat to take advantage of it.  Also modified
1322    config/install.sh (and called it config/new-install.sh) to take advantage
1323    of it on Unix systems.  (The SML code is (supposed to be) platform-
1324    independent.)
1325    
1326    The installer can now install everything under Win32
1327    as well as under *nix as long as it compiles.
1328    
1329    Other changes:
1330    
1331      - made CML compile again under Win32
1332      - made eXene compile under Win32 (by providing a fake structure UnixSock
1333        and by using OS.Process.getEnv instead of Posix.ProcEnv.getenv)
1334      - fixed a bug in nowhere: it assumed that type OS.Process.status is the
1335        same as type int;  under Win32 it isn't
1336      - fixed some slice-related problems in the win32-specific parts of CML
1337      - added a functor argument "sameVol" to os-path-fn.sml in the Basis
1338        (under Win32, the volume name is case-insensitive, and the
1339        OS.Path code compares volume names for equality)
1340    
1341    ----------------------------------------------------------------------
1342    Name: Matthias Blume (blume (at) tti - c (dot) org)
1343    Date: 2003/09/08 11:55:00 CDT
1344    Tag: blume-20030908-fullpath
1345    Description:
1346    
1347    Made Win32 version of OS.FileSys.fullPath return current directory
1348    when given an empty string.  This is what the spec says, and incidentally,
1349    CM depends on it.  (CM otherwise goes into an infinite loop in certain
1350    cases when presented with the name of a non-existing .cm file.)
1351    
1352    ----------------------------------------------------------------------
1353    Name: Matthias Blume (blume (at) tti - c (dot) org)
1354    Date: 2003/09/04 16:30:00 CDT
1355    Tag: blume-20030905-slices-etc
1356    Description:
1357    
1358      1. Changed interface to vectors and arrays in Basis to match
1359         (draft) Basis spec.
1360      2. Added signatures and implementations of slices according to
1361         Basis spec.
1362      3. Edited source code throughout the system to make it compile again
1363         under 1. and 2.  (In some cases code had to be added to have it
1364         match the new signatures.)
1365      4. MLRISC should be backward-compatible: the copies of the originals
1366         of files that needed to change under 3. were retained, the .cm files
1367         check the compiler version number and use old versions when
1368         appropriate.
1369      5. Changed type of OS.FileSys.readDir and Posix.FileSys.readdir to
1370         dirstream -> string option (in accordance with Basis spec).
1371      6. When generating code that counts lines, ml-lex used function
1372         CharVector.foldli, taking advantage of its old interface.
1373         This has been replaced with the corresponding code from
1374         CharVectorSlice.  (html-lex must be re-lexed!)
1375      7. BitArray in smlnj-lib/Util has been extended/modified to match the
1376         new MONO_ARRAY signature.  (Do we need BitArraySlice?)
1377      8. Removed temporary additions (fromInternal, toInternal) from the
1378         (now obsolete) IntInf in smlnj-lib/Util.
1379      9. Cleaned up structure Byte.
1380     10. Added localOffset, scan, and fromString to Date (according to spec).
1381         Cleaned/corrected implementation of Date.
1382         (Still need to check for correctness; implement better canonicalizeDate.)
1383     11. Added "scan" to signature IEEE_REAL.
1384     12. Some improvements to IntInf [in particular: efficiency-hack for
1385         mod and rem when second operand is 2 (for parity checks).]
1386     13. Changed representation of type Time.time, using a single IntInf.int
1387         value counting microseconds.  This considerably simplified the
1388         implementation of structure Time.  We now support negative time
1389         values; scan and fromString handle signs.
1390     14. Functor PrimIO now takes two additional arguments (VectorSlice and
1391         ArraySlice).
1392    
1393    ----------------------------------------------------------------------
1394    Name: Matthias Blume (blume (at) tti - c (dot) org)
1395    Date: 2003/08/28 17:00:00 CDT
1396    Tag: blume-20030828-intinf
1397    Description:
1398    
1399    This is a major update which comes with a version number bump
1400    (110.42.99 -- yes, we are really close to 110.43 :-), NEW BOOTFILES,
1401    and an implementation of IntInf in the Basis.
1402    
1403    There are a fairly large number of related changes and updates throughout
1404    the system:
1405    
1406    Basis:
1407            - Implemented IntInf.
1408            - Made LargeInt a projection of IntInf (by filtering through INTEGER).
1409            - Added some missing Real64 operations, most notably Real.toLargeInt.
1410            - Added FixedInt as a synonym for Int32.
1411    
1412    compiler:
1413            * Added support for a built-in intinf type.
1414              - literals
1415              - pattern matching
1416              - conversion shortcuts (Int32.fromLarge o Int.toLarge etc.)
1417              - overloading on literals and operations
1418    
1419            This required adding a primitive type intinf, some additional
1420            primops, and implementations for several non-trivial intinf
1421            operations in Core.  (The intinf type is completely abstract
1422            to the compiler; all operations get delegated back to the Core.)
1423    
1424            * Intinf equality is handled by polyequal.  However, the compiler
1425            does not print its usual warning in this case (since polyequal
1426            is the right thing to do there).
1427    
1428            * Improved the organization of structure InlineT.
1429    
1430            * A word about conversion primops:
1431            If conversions involving intinf do not cancel out during
1432            CPS contract, then the compiler must insert calls to Core functions.
1433            Since all core access must be resolved already during the FLINT
1434            translate phase, it would be too late a the time of CPS contract
1435            to add new Core calls.  For this reason, conversion primops
1436            for intinf carry two arguments:  1. the numeric argument that
1437            they are supposed to convert, and 2. the Core function that
1438            can help with this conversion if necessary.  If CPS contract
1439            eliminates a primop, then the associated Core function becomes
1440            dead and goes away.  Intinf conversion primops that do not get
1441            eliminated by CPS contract get rewritten into calls of their
1442            core functions by a separate, new phase.
1443    
1444    interactive system:
1445            - Control.Print.intinfDepth controls max length of intinf constants
1446            being printed. (Analogous to Control.Print.stringDepth.)
1447            - Cleanup in printutil and pputil: got rid of unused stuff and
1448            duplicates; replaced some of the code with code that makes better
1449            use of library functionality.
1450    
1451    CM:
1452            Bugfix: parse-errors in init group (system/smlnj/init/init.cmi)
1453            are no longer silent.
1454    
1455    CKIT:
1456            Fixed mismatched uses of Int32 and LargeInt.  I always decided
1457            in favor of LargeInt -- which is now the same as IntInf.
1458            CKIT-knowledgable people should check whether this is what's
1459            intended and otherwise change things back to using Int32 or
1460            FixedInt.
1461    
1462    Throughout the code:
1463            Started using IntInf.int literals and built-in operations
1464            (e.g., comparison with 0) where this seems appropriate.
1465    
1466    
1467    ----------------------------------------------------------------------
1468    Name: Dave MacQueen (dbm@cs.uchicago.edu)
1469    Date: 2003/08/13 11:36:00 CDT
1470    Tag: dbm-20030813-mcz-merge1
1471    Description:
1472    
1473    Merging changes from the mcz-branch development branch into trunk.
1474    These changes involve replacement of the emulated old prettyprinter
1475    interface with direct use of the SML/NJ Lib PP library, and fixing
1476    of a couple of bugs (895, 1186) relating to error messages.  A new
1477    prettyprinter for ast datatypes (Elaborator/print/ppast.{sig,sml})
1478    has been added.
1479    
1480    ----------------------------------------------------------------------
1481    Name: Matthias Blume (blume (at) tti - c (dot) org)
1482    Date: 2003/08/11 15:45:00 CDT
1483    Tag: blume-20030811-windows
1484    Description:
1485    
1486    Version number bumped to 110.42.9.  NEW BOOTFILES!!!
1487    
1488        http://smlnj.cs.uchicago.edu/dist/working/110.42.9/
1489    
1490    This patch restores SML/NJ's ability to run under win32.  There are a
1491    number of changes, including fixes for several bugs that had gone
1492    unnoticed until now:
1493    
1494      - uname "CYGWIN_NT*" is recognized as win32 (This is relevant only when
1495        trying to run the win32 version from within cygwin.)
1496    
1497      - There are a number of simple .bat scripts that substitute for their
1498        corresponding Unix shell-scripts.  (See below.)
1499    
1500      - The internals of ml-build have been modified slightly.  The main
1501        difference is that instead of calling ".link-sml" (or link-sml.bat)
1502        using OS.Process.system, the ML process delegates this task back
1503        to the script.  Otherwise problems arise in mixed environments such
1504        as Cygwin where scripts look and work like Unix scripts, but
1505        where OS.Process.system cannot run them.
1506    
1507      - In CM, the srcpath pickler used native pathname syntax -- which
1508        is incorrect in the case of cross-compilation.  The new pickle format
1509        is independent of platform-specific naming conventions.
1510    
1511      - Path configuration files (such as lib/pathconfig) can now choose
1512        between native and standard syntax.  Placing a line of the form
1513    
1514            standard!
1515    
1516        into the file causes all subsequent paths to be interpreted using
1517        CM standard pathname syntax (= Unix conventions); a line
1518    
1519            native!
1520    
1521        switches back to native style.  This was needed so that
1522        path config files can be written portably, see src/system/pathconfig.
1523    
1524      - Runtime system:
1525    
1526          - win32-filesys.c:  get_file_time and set_file_time now
1527            access modification time, not creation time.
1528    
1529          - I/O code made aware of new array representation.
1530    
1531          - Bug fixes in X86.prim.masm.
1532    
1533       - src/system/makeml made aware of win32. (For use under cygwin
1534            and other Unix-environments for windows.)
1535    
1536       - In Basis, fixed off-by-one error in win32-io.sml (function vecF)
1537         which caused BinIO.inputAll to fail consistently.
1538    
1539    .bat scripts:
1540    
1541       Windows .bat scripts assume that SMLNJ_HOME is defined.
1542    
1543       - sml.bat, ml-yacc.bat, ml-lex.bat:  Driver scripts for standalone
1544         applications (sml, ml-yacc, ml-lex).
1545       - ml-build.bat: analogous to ml-build.
1546       - config\install.bat:  Analogous to config/install.sh.  This requires
1547         that SMLNJ_HOME is set and that Microsoft Visual C is ready to use.
1548         (nmake etc. must be on the path, and vcvars32 must have been run.)
1549         Moreover, sources for ml-lex and ml-yacc need to exist under src,
1550         and the bootfile hierarchy must have been unpacked under
1551         sml.boot.x86-win32.
1552         The script is very primitive and does a poor job at error checking.
1553         It only installs the base system, ml-lex, and ml-yacc.  No other
1554         libraries are being installed (i.e., you get only those that
1555         are part of the compiler.)
1556       - link-sml.bat:  analogous to .link-sml, but not currently used
1557    
1558    Unrelated bug fixes:
1559    
1560      - ml-nlffigen now exports structures ST_* corresponding to incomplete
1561        types.
1562      - Added getDevice to PP/src/pp-debug-fn.sml.  (Would not compile
1563        otherwise.)
1564    
1565    ----------------------------------------------------------------------
1566    Name: Dave MacQueen (macqueen@cs.uchicago.edu)
1567    Date: 2003/06/17
1568    Tag: macqueen-20030617-bug895
1569    Description:
1570    
1571    Modified compiler/Elaborator/print/pptype.sml to fix bug 895.
1572    Tag will be used for new development branch (mcz-branch) for
1573    use by MacQueen, (Lucasz) Zairek, and (George) Cao at uchicago.
1574    
1575    ----------------------------------------------------------------------
1576    Name: Matthias Blume (blume (at) tti - c (dot) org)
1577    Date: 2003/05/27 16:55:00 CDT
1578    Tag: blume-20030527-polyeq
1579    Description:
1580    
1581    Tried to eliminated most cases of polymorphic equality.
1582    
1583    ----------------------------------------------------------------------
1584    Name: Matthias Blume (blume (at) tti - c (dot) org)
1585    Date: 2003/05/21 17:45:00 CDT
1586    Tag: blume-20030517-complete
1587    Description:
1588    
1589    Two changes:
1590    
1591      1. Added a flag for controlling whether non-exhaustive bindings will
1592         be treated as errors (default is false).
1593      2. Cleaned up the *entire* source tree so that CMB.make goes through
1594         without a single non-exhaustive match- or bind warning.
1595    
1596    ----------------------------------------------------------------------
1597    Name: Matthias Blume (blume (at) tti - c (dot) org)
1598    Date: 2003/05/17 10:20:00 CDT
1599    Tag: blume-20030517-absyn
1600    Description:
1601    
1602    1. Added cases for IF, WHILE, ANDALSO, and ORELSE to Absyn.
1603    
1604       This mainly affects the quality of error messages.  However, some
1605       of the code is now more straightforward than before. (Treatment of
1606       the above four constructs in translate.sml is much simpler than
1607       the "macro-expansion" that was going on before.  Plus, the mach-
1608       compiler no longer gets invoked just to be able to compile an
1609       if-expression.)
1610    
1611    2. The ErrorMsg.Error exception is now caught and absorbed by the
1612       interactive loop.
1613    
1614    ----------------------------------------------------------------------
1615    Name: Allen Leung
1616    Date: 2003/05/16 13:05:00 CDT
1617    Tag: leunga-20030516-cygwin-runtime
1618    Description:
1619    
1620        Ported the runtime system to cygwin, which uses the unix
1621    x86-unix bin files.  Missing/buggy features:
1622    
1623       o getnetbyname, getnetbyaddr: these functions seem to be missing in
1624         the Cygwin library.
1625       o Ctrl-C handling may be flaky.
1626       o Windows system calls and Windows I/O are not supported.
1627    
1628       A new set of binfiles is located at:
1629    
1630         http://www.dorsai.org/~leunga/boot.x86-unix.tgz
1631    
1632       This is only needed for bootstrapping the cygwin version of smlnj.
1633       Other x86 versions can use the existing binfiles.
1634    
1635    ----------------------------------------------------------------------
1636    Name: Matthias Blume
1637    Date: 2003/04/08 15:42:00 CDT
1638    Tag: blume-20030408-listpair
1639    Description:
1640    
1641    1. Added a target 'mlrisc' to installer.
1642    
1643    2. Added missing elements to structure ListPair.
1644    
1645    ----------------------------------------------------------------------
1646    Name: Allen Leung
1647    Date: 2003/01/07 10:40:00 EST
1648    Tag: leunga-20030107-int-rem
1649    Description:
1650    
1651    Fixed a bug in Int.rem(x,y) where y is a power of 2 on x86.
1652    The arguments to the SUBL instruction were swapped.
1653    
1654    ----------------------------------------------------------------------
1655    Name: Matthias Blume
1656    Date: 2002/12/12 16:25:00 EST
1657    Tag: blume-20021212-risc-ra
1658    Description:
1659    
1660    Fixed a serious bug in the rewrite code for FP spilling/reloading that
1661    sent the RA into an infinite loop when floating point registers get
1662    spilled.  (Because of this bug, e.g., nucleic stopped compiling between
1663    110.37 and 110.38.)
1664    There was another set of potential problems related to the handling of
1665    MLRISC annotations (but those did not yet cause real problems, apparently).
1666    
1667    ----------------------------------------------------------------------
1668    Name: Matthias Blume
1669    Date: 2002/12/06 22:40:00 EST
1670    Tag: blume-20021206-cm-fileid
1671    Description:
1672    
1673    Added a call of SrcPath.sync at the beginning of Parse.parse (in CM).
1674    This fixes the problem of CM getting confused by files that suddenly
1675    change their identity (e.g., by getting unlinked and recreated by some
1676    text editor such as vi).  There might be a better/cheaper/cleaner way
1677    of doing this, but for now this will have to do.
1678    
1679    ----------------------------------------------------------------------
1680    Name: Matthias Blume
1681    Date: 2002/10/28 09:50:00 EST
1682    Tag: blume-20021028-typecheck
1683    Description:
1684    
1685    Exported structure Typecheck from $smlnj/viscomp/core.cm.
1686    
1687    ----------------------------------------------------------------------
1688    Name: Matthias Blume
1689    Date: 2002/10/17 09:10:00 EDT
1690    Tag: Release_110_42
1691    Description:
1692    
1693    In good old tradition, there has been a slight hiccup so that we have
1694    to patch 110.42 after the fact.   The old release tag has been replaced
1695    (see below).
1696    
1697    The change solves a problem with two competing approaches the
1698    configuration problem regarding MacOS 10.1 vs. MacOS 10.2 which got in
1699    each other's way.
1700    
1701    This change only affects the runtime system code and the installer script.
1702    (No new bootfiles.)
1703    
1704    ----------------------------------------------------------------------
1705    Name: Matthias Blume
1706    Date: 2002/10/16 12:00:00 EDT
1707    Tag: Release_110_42_removed
1708    Description:
1709    
1710    New working release.  New bootfiles.
1711    
1712    ----------------------------------------------------------------------
1713    Name: Matthias Blume
1714    Date: 2002/10/10 13:10:00 EDT
1715    Tag: blume-20021010-ppc-divs
1716    Description:
1717    
1718    The mltree operator DIVS must be implemented with an overflow check on
1719    the PPC because the hardware indicates divide-by-zero using "overflow" as
1720    well.
1721    
1722    ----------------------------------------------------------------------
1723    Name: Matthias Blume
1724    Date: 2002/07/23 11:45:00
1725    Tag: blume-20020723-smlnj-home
1726    Description:
1727    
1728    Sml now senses the SMLNJ_HOME environment variable.  If this is set,
1729    then the bin dir is assumed to be in $SMLNJ_HOME/bin and (unless
1730    CM_PATHCONFIG is also set), the path configuration file is assumed
1731    to be in $SMLNJ_HOME/lib/pathconfig.  This way one can easily move
1732    the entire tree to some other place and everything will "just work".
1733    
1734    (Companion commands such as ml-build and ml-makedepend also sense this
1735    variable.)
1736    
1737    ----------------------------------------------------------------------
1738    Name: Matthias Blume
1739    Date: 2002/07/12 21:19:00 EDT
1740    Tag: blume-20020712-liveness
1741    Description:
1742    
1743    Exported two useful "step" functions from liveness module (MLRISC).
1744    
1745    ----------------------------------------------------------------------
1746    Name: Matthias Blume
1747    Date: 2002/07/05 16:00 EDT
1748    Tag: Release_110_41
1749    Description:
1750    
1751    New working release.  New bootfiles.
1752    
1753    ----------------------------------------------------------------------
1754    Name: Matthias Blume
1755    Date: 2002/07/05 10:25:00 EDT
1756    Tag: blume-20020705-btimp
1757    Description:
1758    
1759    Exported structure BTImp from $smlnj/viscomp/debugprof.cm so that
1760    other clients can set up backtracing support.
1761    
1762    ----------------------------------------------------------------------
1763    Name: Matthias Blume
1764    Date: 2002/06/25 17:23:00 EDT
1765    Tag: blume-20020625-fpmax
1766    Description:
1767    
1768    Fixed a bug in translation of INLMAX (and INLMIN) for the floating-point
1769    case.  (The sense of the isNaN test was reversed -- which made min and
1770    max always return their first argument.)
1771    
1772    ----------------------------------------------------------------------
1773    Name: Matthias Blume
1774    Date: 2002/06/11
1775    Tag: blume-20020611-unixpath
1776    Description:
1777    
1778    Back-ported OS.Path.{from,to}UnixPath from idlbasis-devel branch.
1779    
1780    ----------------------------------------------------------------------
1781    Name: Matthias Blume
1782    Date: 2002/06/10 16:35:00 EDT
1783    Tag: blume-20020610-ieeereal
1784    Description:
1785    
1786    I back-ported my implementation of IEEEReal.fromString from the
1787    idlbasis-devel branch so that we can test it.
1788    
1789    Another small change is that ppDec tries to give more information
1790    than just "<sig>" in the case of functors.  However, this code is
1791    broken in some mysterious way if the functor's body's signature
1792    has not been declared by ascription but gets inferred from the
1793    implementation.  This needs fixing...
1794    
1795    ----------------------------------------------------------------------
1796    Name: Matthias Blume
1797    Date: 2002/05/31
1798    Tag: blume-20020531-btrace-mode
1799    Description:
1800    
1801    Resurrected SMLofNJ.Internals.BTrace.mode.  (It accidentally fell by
1802    the wayside when I switched over to using Controls everywhere.)
1803    
1804    ----------------------------------------------------------------------
1805    Name: Lal George
1806    Date: 2002/05/23 12:21:40 EDT
1807    Tag: george-20020523-visual-labels
1808    Description:
1809    
1810    Labels are now displayed in the graphical output to make
1811    the fall-through and target blocks obvious.
1812    
1813    ----------------------------------------------------------------------
1814    Name: Matthias Blume
1815    Date: 2002/05/22 11:03:00 EDT
1816    Tag: blume-20020522-shrink
1817    Description:
1818    
1819    John tweaked yesterday's fix for 1131 to handle an out-of-memory
1820    situation that comes up when allocating huge arrays.
1821    
1822    ----------------------------------------------------------------------
1823    Name: Matthias Blume
1824    Date: 2002/05/21 16:00:00 EDT
1825    Tag: Release_110_40
1826    Description:
1827    
1828    New working release (110.40).  New bootfiles.
1829    
1830    [Also: John Reppy fixed GC bug 1131.]
1831    
1832    ----------------------------------------------------------------------
1833    Name: Matthias Blume
1834    Date: 2002/05/21 12:35:00 EDT
1835    Tag: blume-20020521-cmdoc
1836    Description:
1837    
1838    CM documentation update.
1839    
1840    ----------------------------------------------------------------------
1841    Name: Matthias Blume
1842    Date: 2002/05/21 10:55:00 EDT
1843    Tag: blume-20020521-misc
1844    Description:
1845    
1846    - John tweaked runtime to be silent on heap export (except when
1847      GC messages are on).
1848    - I added a few more things (cross-compiling versions of CMB) to
1849      config/preloads (as suggestions).
1850    
1851    ----------------------------------------------------------------------
1852    Name: Matthias Blume
1853    Date: 2002/05/20 22:25:00 EDT
1854    Tag: blume-20020520-controls
1855    Description:
1856    
1857    - Added ControlUtil structure to control-lib.cm.
1858    - Use it throughout.
1859    - Used Controls facility to define MLRISC controls (as opposed to
1860      registering MLRISC control ref cells with Controls after the fact)
1861    - Fixed messed-up controls priorities.
1862    
1863    * Removed again all the stuff from config/preloads that one wouldn't
1864      be able to preload at the time the initial heap image is built.
1865      (Many libraries, e.g., CML, do not exist yet at this time.  The
1866       only libraries that can be preloaded via config/preloads are those
1867       that come bundled with the bootfiles.)
1868    
1869    ----------------------------------------------------------------------
1870    Name: Matthias Blume
1871    Date: 2002/05/20 10:59:00 EDT
1872    Tag: blume-20020520-preloads
1873    Description:
1874    
1875    Added a lot of commented-out suggestions for things to be included
1876    in config/preloads.
1877    
1878    ----------------------------------------------------------------------
1879    Name: Allen Leung
1880    Date: 2002/05/18 14:20:00 EDT
1881    Tag: leunga-20020518-mdl
1882    Description:
1883    
1884    o Made the mdl tool stuff compile and run again.
1885    o I've disabled all the stuff that depends on RTL specifications; they
1886      are all badly broken anyway.
1887    
1888    ----------------------------------------------------------------------
1889    Name: Matthias Blume
1890    Date: 2002/05/17 16:49:00 EDT
1891    Tag: blume-20020517-controls
1892    Description:
1893    
1894    0. John Reppy made several modifications to the SML/NJ library.
1895       In particular, there is a shiny new controls-lib.cm.
1896    
1897    1. Pushed new controls interface through compiler so that everything
1898       compiles again.
1899    
1900    2. Added FormatComb and FORMAT_COMB to the CML version of the
1901       SML/NJ library (so that CML compiles again).
1902    
1903    3. Modified init scripts because XXX_DEFAULT environment variables
1904       are no longer with us.  (Boot-time initialization is now done
1905       using the same environment variables that are also used for
1906       startup-time initialization of controls.)
1907    
1908    ----------------------------------------------------------------------
1909    Name: Lal George
1910    Date: 2002/05/15 09:20:10 EDT
1911    Tag: george-20020515-pseudo-op-decls
1912    Description:
1913    
1914            All pseudo-ops emitted before the first segment declaration
1915    such as TEXT, DATA, and BSS directives are assumed to be global
1916    declarations and are emitted first in the assembly file. This is
1917    useful in a number of situations where one has pseudo-ops that are not
1918    specific to any segment, and also works around the constraint that one
1919    cannot have client pseudo-ops in the TEXT segment.
1920    
1921            Because no segment is associated with these declarations it is
1922    an error to allocate any space or objects before the first segment
1923    directive and an exception will be raised. However, we cannot make
1924    this check for client pseudo-ops.
1925    
1926            These top level declarations are a field in the CFG graph_info.
1927    In theory you can continue to add to this field after the CFG has been
1928    built -- provided you know what you are doing;-)
1929    
1930    ----------------------------------------------------------------------
1931    Name: Matthias Blume
1932    Date: 2002/05/13 16:40:00 EDT
1933    Tag: blume-20020513-pp-etc
1934    Description:
1935    
1936    A few minor bugfixes:
1937    
1938      - Stopgap measure for bug recently reported by Elsa Gunter (ppDec).
1939        (Bogus printouts for redefined bindings still occur.  Compiler
1940        bug should no longer occur now.  We need to redo the prettyprinter
1941        from scratch.)
1942    
1943      - CM pathname printer now also adds escape sequences for ( and )
1944    
1945      - commend and docu fixes for ml-nlffi
1946    
1947    ----------------------------------------------------------------------
1948    Name: Matthias Blume
1949    Date: 2002/05/10 16:40:00 EDT
1950    Tag: blume-20020510-erg-textio
1951    Description:
1952    
1953    Applied the following bugfix provided by Emden Gansner:
1954    
1955        Output is corrupted when outputSubstr is used rather than output.
1956    
1957        The problem occurs when a substring
1958    
1959            ss = (s, dataStart, dataLen)
1960    
1961        where dataStart > 0, fills a stream buffer with avail bytes left.
1962        avail bytes of s, starting at index dataStart, are copied into the
1963        buffer, the buffer is flushed, and then the remaining dataLen-avail
1964        bytes of ss are copied into the beginning of the buffer. Instead of
1965        starting this copy at index dataStart+avail in s, the current code
1966        starts the copy at index avail.
1967    
1968        Fix:
1969        In text-io-fn.sml, change line 695 from
1970             val needsFlush = copyVec(v, avail, dataLen-avail, buf, 0)
1971        to
1972             val needsFlush = copyVec(v, dataStart+avail, dataLen-avail, buf, 0)
1973    
1974    ----------------------------------------------------------------------
1975    Name: Matthias Blume
1976    Date: 2002/04/12 13:55:00 EDT
1977    Tag: blume-20020412-assyntax
1978    Description:
1979    
1980    1. Grabbed newer assyntax.h from the XFree86 project.
1981    2. Fiddled with how to compile X86.prim.asm without warnings.
1982    3. (Very) Minor cleanup in CM.
1983    
1984    ----------------------------------------------------------------------
1985    Name: Matthias Blume
1986    Date: 2002/04/01 (no joke!) 17:07:00 EST
1987    Tag: blume-20020401-x86div
1988    Description:
1989    
1990    Added full support for div/mod/rem/quot on the x86, using the machine
1991    instruction's two results (without clumsily recomputing the remainder)
1992    directly where appropriate.
1993    
1994    Some more extensive power-of-two support was added to the x86 instruction
1995    selector (avoiding expensive divs, mods, and muls where they can be
1996    replaced with cheaper shifts and masks).  However, this sort of thing
1997    ought to be done earlier, e.g., within the CPS optimizer so that
1998    all architectures benefit from it.
1999    
2000    The compiler compiles to a fixed point, but changes might be somewhat
2001    fragile nevertheless.  Please, report any strange things that you might
2002    see wrt. div/mod/quot/rem...
2003    
2004    ----------------------------------------------------------------------
2005    Name: Matthias Blume
2006    Date: 2002/03/29 17:22:00
2007    Tag: blume-20020329-div
2008    Description:
2009    
2010    Fixed my broken div/mod logic.  Unfortunately, this means that the
2011    inline code for div/mod now has one more comparison than before.
2012    Fast paths (quotient > 0 or remainder = 0) are not affected, though.
2013    The problem was with quotient = 0, because that alone does not tell
2014    us which way the rounding went.  One then has to look at whether
2015    remainder and divisor have the same sign...  :(
2016    
2017    Anyway, I replaced the bootfiles with fresh ones...
2018    
2019    ----------------------------------------------------------------------
2020    Name: Matthias Blume
2021    Date: 2002/03/29 14:10:00 EST
2022    Tag: blume-20020329-inlprims
2023    Description:
2024    
2025    NEW BOOTFILES!!!    Version number bumped to 110.39.3.
2026    
2027    Primops have changed. This means that the bin/boot-file formats have
2028    changed as well.
2029    
2030    To make sure that there is no confusion, I made a new version.
2031    
2032    
2033    CHANGES:
2034    
2035    * removed REMT from mltree (remainder should never overflow).
2036    
2037    * added primops to deal with divisions of all flavors to the frontend
2038    
2039    * handled these primops all the way through so they map to their respective
2040      MLRISC support
2041    
2042    * used these primops in the implementation of Int, Int32, Word, Word32
2043    
2044    * removed INLDIV, INLMOD, and INLREM as they are no longer necessary
2045    
2046    * parameterized INLMIN, INLMAX, and INLABS by a numkind
2047    
2048    * translate.sml now deals with all flavors of INL{MIN,MAX,ABS}, including
2049      floating point
2050    
2051    * used INL{MIN,MAX,ABS} in the implementation of Int, Int32, Word, Word32,
2052      and Real (but Real.abs maps to a separate floating-point-only primop)
2053    
2054    
2055    TODO items:
2056    
2057    * Hacked Alpha32 instruction selection, disabling the selection of REMx
2058      instructions because the machine instruction encoder cannot handle
2059      them.  (Hppa, PPC, and Sparc instruction selection did not handle
2060      REM in the first place, and REM is supported by the x86 machine coder.)
2061    
2062    * Handle DIV and MOD with DIV_TO_NEGINF directly in the x86 instruction
2063      selection phase.  (The two can be streamlined because the hardware
2064      delivers both quotient and remainder at the same time anyway.)
2065    
2066    * Think about what to do with "valOf(Int32.minInt) div ~1" and friends.
2067      (Currently the behavior is inconsistent both across architectures and
2068      wrt. the draft Basis spec.)
2069    
2070    * Word8 should eventually be handled natively, too.
2071    
2072    * There seems to be one serious bug in mltree-gen.sml.  It appears, though,
2073      as if there currently is no execution path that could trigger it in
2074      SML/NJ.  (The assumptions underlying functions arith and promotable do not
2075      hold for things like multiplication and division.)
2076    
2077    ----------------------------------------------------------------------
2078    Name: Matthias Blume
2079    Date: 2002/03/27 16:27:00 EST
2080    Tag: blume-20020327-mlrisc-divisions
2081    Description:
2082    
2083    Added support for all four division operations (ML's div, mod, quot,
2084    and rem) to MLRISC.  In the course of doing so, I also rationalized
2085    the naming (no more annoying switch-around of DIV and QUOT), by
2086    parameterizing the operation by div_rounding_mode (which can be either
2087    DIV_TO_ZERO or DIV_TO_NEGINF).
2088    
2089    The generic MLTreeGen functor takes care of compiling all four
2090    operations down to only round-to-zero div.
2091    
2092    Missing pieces:
2093    
2094      * Doing something smarter than relying on MLTreeGen on architectures
2095        like, e.g., the x86 where hardware division delivers both quotient and
2096        remainder at the same time.  With this, the implementation of the
2097        round-to-neginf operations could be further streamlined.
2098    
2099      * Remove inlining support for div/mod/rem from the frontend and replace it
2100        with primops that get carried through to the backend.  Do this for all
2101        int and word types.
2102    
2103    ----------------------------------------------------------------------
2104    Name: Matthias Blume
2105    Date: 2002/03/25 17:25:00 EST
2106    Tag: blume-20020325-divmod
2107    Description:
2108    
2109    I improved (hopefully without breaking them) the implementation of Int.div,
2110    Int.mod, and Int.rem.   For this, the code in translate.sml now takes
2111    advantage of the following observations:
2112    
2113      Let  q = x quot y      r = x rem y
2114           d = x div  y      m = x mod y
2115    
2116    where "quot" is the round-to-zero version of integer division that
2117    hardware usually provides.  Then we have:
2118    
2119         r = x - q * y        where neither the * nor the - will overflow
2120         d = if q >= 0 orelse x = q * y then q else q - 1
2121                              where neither the * nor the - will overflow
2122         m = if q >= 0 orelse r = 0 then r else r + y
2123                              where the + will not overflow
2124    
2125    This results in substantial simplification of the generated code.
2126    The following table shows the number of CFG nodes and edges generated
2127    for
2128            fun f (x, y) = x OPER y
2129            (* with OPER \in div, mod, quot, rem *)
2130    
2131    
2132        OPER | nodes(old) | edges(old) | nodes(new) | edges(new)
2133        --------------------------------------------------------
2134         div |         24 |         39 |         12 |         16
2135         mod |         41 |         71 |         12 |         16
2136        quot |          8 |         10 |          8 |         10
2137         rem |         10 |         14 |          8 |         10
2138    
2139    
2140    ----------------------------------------------------------------------
2141    Name: Matthias Blume
2142    Date: 2002/03/25 22:06:00 EST
2143    Tag: blume-20020325-cprotobug
2144    Description:
2145    
2146    Fixed a bug in cproto (c prototype decoder).
2147    
2148    ----------------------------------------------------------------------
2149    Name: Matthias Blume
2150    Date: 2002/03/25 16:00:00 EST
2151    Tag: blume-20020325-raw-primops
2152    Description:
2153    
2154    I did some cleanup to Allen's new primop code and
2155    replaced yesterday's bootfiles with new ones.
2156    (But they are stored in the same place.)
2157    
2158    ----------------------------------------------------------------------
2159  Name: Matthias Blume  Name: Matthias Blume
2160  Date: 2002/03/24 22:40:00 EST  Date: 2002/03/24 22:40:00 EST
2161  Tag: blume-20020324-bootfiles  Tag: blume-20020324-bootfiles

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