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revision 749, Fri Dec 8 15:16:36 2000 UTC revision 1062, Wed Feb 13 21:15:14 2002 UTC
# Line 8  Line 8 
8  The form of an entry should be:  The form of an entry should be:
9    
10  Name:  Name:
11  Date:  Date: yyyy/mm/dd
12  Tag: <post-commit CVS tag>  Tag: <post-commit CVS tag>
13  Description:  Description:
14    
15    ----------------------------------------------------------------------
16    Name: Matthias Blume
17    Date: 2002/02/13 16:15:00 EST
18    Tag: blume-20020213-various
19    Description:
20    
21    1. More tweaks to ml-nlffigen:
22    
23       - better internal datastructures (resulting in slight speedup)
24       - "-match" option requires exact match
25       - "localized" gensym counters (untagged structs/unions nested within
26         other structs/unions or within typedefs get a fresh counter; their
27         tag will be prefixed by a concatenation of their parents' tags)
28       - bug fixes (related to calculation of transitive closure of types
29         to be included in the output)
30    
31    2. Minor Basis updates:
32    
33       - added implementations for List.collate and Option.app
34    
35    ----------------------------------------------------------------------
36    Name: Matthias Blume
37    Date: 2002/02/11 15:55:00 EST
38    Tag: blume-20020211-gensym
39    Description:
40    
41    Added a "-gensym" option to command line of ml-nlffigen.  This can be
42    used to specify a "stem" -- a string that is inserted in all "gensym'd"
43    names (ML structure names that correspond to unnamed C structs, unions,
44    and enums), so that separate runs of ml-nlffigen do not clash.
45    
46    ----------------------------------------------------------------------
47    Name: Matthias Blume
48    Date: 2002/02/11 12:05:00 EST
49    Tag: blume-20020211-gensml
50    Description:
51    
52    A quick fix for a problem with GenSML (in the pgraph-util library):
53    Make generation of toplevel "local" optional.  (Strictly speaking,
54    signature definitions within "local" are not legal SML.)
55    
56    Other than that: updates to INSTALL and cm/TODO.
57    
58    ----------------------------------------------------------------------
59    Name: Matthias Blume
60    Date: 2002/02/08 15:00:00 EST
61    Tag: blume-20020208-uniquepid
62    Description:
63    
64    0. Version number has been bumped to 110.38.1.  NEW BOOTFILES!!!
65    
66    1. The installer (config/install.sh) has gotten smarter:
67    
68         - Configuration options are a bit easier to specify now
69           (in config/targets).
70         - Bug in recognizing .tar.bz2 files fixed.
71         - Installer automatically resolves dependencies between
72           configuration options (e.g., if you ask for eXene, you will
73           also get cml -- regardless whether you asked for it or not).
74         - Installer can run in "quieter mode" by setting the environment
75           variable INSTALL_QUIETLY to "true".  "Quieter" does not mean
76           "completely silent", though.
77         - Build HashCons library as part of smlnj-lib.
78    
79    2. A new scheme for assigning persistent identifiers to compilation
80       units (and, by extension, to types etc.) has been put into place.
81       This fixes a long-standing bug where types and even dynamic values
82       can get internally confused, thereby compromising type safety
83       (abstraction) and dynamic correctness.  See
84    
85         http://cm.bell-labs.com/cm/cs/who/blume/pid-confusion.tgz
86    
87       for an example of how things could go wrong until now.
88    
89       The downside of the new scheme is that pids are not quite as
90       persistent as they used to be: CM will generate a fresh pid
91       for every compilation unit that it thinks it sees for the first
92       time.  That means that if you compile starting from a clean, fresh
93       source tree at two different times, you end up with different
94       binaries.
95    
96       Cutoff recompilation, however, has not been compromised because
97       CM keeps pid information in special caches between runs.
98    
99    ----------------------------------------------------------------------
100    Name: Lal George
101    Date: 2002/02/07 15:34:13 EST 2002
102    Tag: <none>
103    Description:
104    
105    Compilers that generate assembly code may produce  global labels
106    whose value is resolved at link time. The various peephole optimization
107    modules did not take this in account.
108    
109    TODO. The Labels.addrOf function should really return an option
110    type so that clients are forced to deal with this issue, rather
111    than an exception being raised.
112    
113    ----------------------------------------------------------------------
114    Name: Lal George
115    Date: 2002/02/06 13:55:02 EST
116    Tag: george-20020206-ra-breakup
117    Description:
118    
119    1. A bug fix from Allen.
120    
121        A typo causes extra fstp %st(0)'s to be generated at compensation
122        edges, which might cause stack underflow traps at runtime.  This
123        occurs in fft where there are extraneous fstps right before the 'into'
124        trap instruction (in this case they are harmless since none of the
125        integers overflow.)
126    
127    2. Pulled out various utility modules that were embedded in the modules
128       of the register allocator. I need these modules for other purposes, but
129       they are not complete enough to put into a library (just yet).
130    ----------------------------------------------------------------------
131    Name: Matthias Blume
132    Date: 2002/01/31 16:05:00 EST
133    Tag: blume-20020131-sparc-ccalls
134    Description:
135    
136    1. C-calls on Sparc needlessly allocated a huge chunk (96 bytes)
137       of extra stack space by mistake.  Fixed.
138    
139    2. Bug in logic of handling of command-line options in ml-nlffigen fixed.
140    
141    ----------------------------------------------------------------------
142    Name: Allen Leung
143    Date: 2002/01/30
144    Tag: leunga-20020130-nowhere-bug-fix
145    Description:
146    
147       MLRISC bug fixes:
148       1. Fixed a bindings computation bug in the 'nowhere' program generator tool.
149       2. MachineInt.fromString was negating its value.
150    
151    ----------------------------------------------------------------------
152    Name: Matthias Blume
153    Date: 2002/01/29
154    Tag: blume-20020129-INSTALL
155    Description:
156    
157    - Added somewhat detailed installation instructions (file INSTALL).
158    - Fixed curl-detection bug in config/install.sh.
159    - It is now possible to select the URL getter using the URLGETTER
160      environment variable:
161    
162          not set / "unknown"      --> automatic detection (script tries wget,
163                                       curl, and lynx)
164          "wget" / "curl" / "lynx" --> use the specified program (script "knows"
165                                       how to properly invoke them)
166          other                    --> use $URLGETTER directly, it must take
167                                       precisely two command-line arguments
168                                       (source URL and destination file name)
169    
170    ----------------------------------------------------------------------
171    Name: Matthias Blume
172    Date: 2002/01/28
173    Tag: blume-20020128-sparc-ccalls
174    Description:
175    
176    - Fixed problem with calculation of "used" registers in sparc-c-calls.
177    - Make use of the allocParam argument in sparc-c-calls.
178    
179    ----------------------------------------------------------------------
180    Name: Matthias Blume
181    Date: 2002/01/28
182    Tag: blume-20020128-allocParam
183    Description:
184    
185    John Reppy:  Changes c-calls API to accept client-callback for
186    allocating extra stack space.
187    me: Corresponding changes to mlriscGen (using a dummy argument that
188        does not change the current behavior).
189    
190    ----------------------------------------------------------------------
191    Name: Matthias Blume
192    Date: 2002/01/28 12:00:00
193    Tag: Release_110_38
194    Description:
195    
196    This time for real!!!
197    
198    ----------------------------------------------------------------------
199    Name: Matthias Blume
200    Date: 2002/01/28 10:56:00 EST
201    Tag: blume-20020128-retraction
202    Description:
203    
204    0. Retracted earlier 110.38.  (The Release_110_38 tag has been replaced
205       with blume-Release_110_38-retracted.)
206    
207    1. Fixed a problem with incorrect rounding modes in real64.sml.
208       (Thanks to Andrew Mccreight <andrew.mccreight@yale.edu>.)
209    
210    2. A bug in ml-nlffigen related to the handling of unnamed structs, unions,
211       and enums fixed.  The naming of corresponding ML identifiers should
212       now be consistent again.
213    
214    ----------------------------------------------------------------------
215    Name: Allen Leung
216    Date: 2002/01/27
217    Tag: leunga-20020127-nowhere
218    Description:
219    
220       Added a target called nowhere in the configuration scripts.
221       Enabling this will build the MLRISC 'nowhere' tool (for translating
222       programs with where-clauses into legal SML code) during installation.
223    
224    ----------------------------------------------------------------------
225    Name: Matthias Blume
226    Date: 2002/01/25 21:27:00 EST
227    Tag: blume-Release_110_38-retracted
228    Description:
229    
230    Call it a (working) release!  Version is 110.38. Bootfiles are ready.
231    
232    README will be added later.
233    
234    !!! NOTE:  Re-tagged as blume-Release_110_38-retracted. Original tag
235    (Release_110_38) removed.  Reason: Last-minute bug fixes.
236    
237    ----------------------------------------------------------------------
238    Name: Matthias Blume
239    Date: 2002/01/25
240    Tag: blume-20020125-ffi
241    Description:
242    
243    A large number of tweaks and improvements to ml-nlffi-lib and
244    ml-nlffigen:
245    
246       - ML represenation types have been streamlined
247       - getter and setter functions work with concrete values, not abstract
248         ones where possible
249       - ml-nlffigen command line more flexible (see README file there)
250       - some bugs have been fixed (hopefully)
251    
252    ----------------------------------------------------------------------
253    Name: Lal George
254    Date: 2002/01/24
255    Tag: george-20020124-risc-ra-interface
256    Description:
257    
258       There is a dramatic simplification in the interface to the
259       register allocator for RISC architectures as a result of making
260       parallel copy instructions explicit.
261    
262    ----------------------------------------------------------------------
263    Name: Matthias Blume
264    Date: 2002/01/22
265    Tag: blume-20020122-x86-ccalls
266    Description:
267    
268    Bug fix for c-calls on x86 (having to do with how char- and
269    short-arguments are being handled).
270    
271    ----------------------------------------------------------------------
272    Name: Matthias Blume
273    Date: 2002/01/21
274    Tag: blume-20020121-ff
275    Description:
276    
277    Another day of fiddling with the FFI...
278    
279    1. Bug fix/workaround:  CKIT does not complain about negative array
280       dimensions, so ml-nlffigen has to guard itself against this possibility.
281       (Otherwise a negative dimension would send it into an infinite loop.)
282    
283    2. Some of the abstract types (light objects, light pointers, most "base"
284       types) in structure C are now eqtypes.
285    
286    3. Added constructors and test functions for NULL function pointers.
287    
288    ----------------------------------------------------------------------
289    Name: Matthias Blume
290    Date: 2002/01/18
291    Tag: blume-20020118-ready-for-new-release
292    Description:
293    
294    Made config/srcarchiveurl point to a new place.  (Will provide boot
295    files shortly.)
296    
297    Maybe we christen this to be 110.38?
298    
299    ----------------------------------------------------------------------
300    Name: Matthias Blume
301    Date: 2002/01/18
302    Tag: blume-20020118-more-ffifiddle
303    Description:
304    
305    Today's FFI fiddling:
306    
307      - Provided a structure CGetSet with "convenient" versions of C.Get.* and
308        C.Set.* that use concrete (MLRep.*) arguments and results instead
309        of abstract ones.
310    
311      - Provided word-style bit operations etc. for "int" representation
312        types in MLRep.S<Foo>Bitops where <Foo> ranges over Char, Int, Short,
313        and Long.
314    
315    ----------------------------------------------------------------------
316    Name: Matthias Blume
317    Date: 2002/01/18
318    Tag: blume-20020118-use-x86-fp
319    Description:
320    
321    Now that x86-fast-fp seems to be working, I turned it back on again
322    by default.  (Seems to work fine now, even with the FFI.)
323    
324    Other than that, I added some documentation about the FFI to
325    src/ml-nlffigen/README and updated the FFI test examples in
326    src/ml-nlffi-lib/Tests/*.
327    
328    ----------------------------------------------------------------------
329    Name: Allen Leung
330    Date: 2002/01/17
331    Tag: leunga-20020117-x86-fast-fp-call
332    Description:
333    
334       1. Fixed a problem with handling return fp values when x86's fast fp
335          mode is turned on.
336    
337       2. Minor pretty printing fix for cellset.  Print %st(0) as %st(0) instead
338          of %f32.
339    
340       3. Added a constructor INT32lit to the ast of MLRISC tools.
341    
342    ----------------------------------------------------------------------
343    Name: Matthias Blume
344    Date: 2002/01/16
345    Tag: blume-20020116-ffifiddle
346    Description:
347    
348    More fiddling with the FFI interface:
349    
350     - Make constness 'c instead of rw wherever possible.  This eliminates
351       the need for certain explicit coercions.  (However, due to ML's
352       value polymorphism, there will still be many cases where explicit
353       coercions are necessary.  Phantom types are not the whole answer
354       to modeling a subtyping relationship in ML.)
355    
356     - ro/rw coersions for pointers added.  (Avoids the detour through */&.)
357    
358     - "printf" test example added to src/ml-nlffi-lib/Tests.  (Demonstrates
359       clumsy workaround for varargs problem.)
360    
361    ----------------------------------------------------------------------
362    Name: Lal George
363    Date: 2002/01/15
364    Tag: <none>
365    Description:
366    
367    1. Since COPY instructions are no longer native to the architecture,
368       a generic functor can be used to implement the expandCopies function.
369    
370    2. Allowed EXPORT and IMPORT pseudo-op declarations to appear inside a
371       TEXT segment.
372    
373    ----------------------------------------------------------------------
374    Name: Matthias Blume
375    Date: 2002/01/15
376    Tag: blume-20020115-ffiupdates
377    Description:
378    
379    1. Fix for bug resulting in single-precision float values being returned
380       incorrectly from FFI calls.
381    
382    2. Small modifications to C FFI API:
383    
384        - memory-allocation routines return straight objects (no options)
385          and raise an exception in out-of-memory situations
386        - unsafe extensions to cast between function pointers and pointers
387          from/to ints
388        - added structure C_Debug as an alternative to structure C where
389          pointer-dereferencing (|*| and |*!) always check for null-pointers
390        - added open_lib' to DynLinkage;  open_lib' works like open_lib
391          but also takes a (possibly empty) list of existing library handles
392          that the current library depends on
393    
394    ----------------------------------------------------------------------
395    Name: Matthias Blume
396    Date: 2002/01/10
397    Tag: blume-20020110-newffigen
398    Description:
399    
400    1. Updates to portable graph code.
401    
402    2. Major update to ml-nlffigen and ml-nlffi-lib.  Things are much
403       more scalable now so that even huge interfaces such as the one
404       for GTK compile in finite time and space. :-)
405       See src/ml-nlffigen/README for details on what's new.
406    
407    ----------------------------------------------------------------------
408    Name: Lal George
409    Date: 2001/01/09 14:31:35 EST 2002
410    Tag: george-20011206-rm-native-copy
411    Description:
412    
413            Removed the native COPY and FCOPY instructions
414            from all the architectures and replaced it with the
415            explicit COPY instruction from the previous commit.
416    
417            It is now possible to simplify many of the optimizations
418            modules that manipulate copies. This has not been
419            done in this change.
420    
421    ----------------------------------------------------------------------
422    Name: Lal George
423    Date: 2001/12/06 16:50:13 EST 2001
424    Tag: george-20011206-mlrisc-instruction
425    Description:
426    
427    Changed the representation of instructions from being fully abstract
428    to being partially concrete. That is to say:
429    
430      from
431            type instruction
432    
433      to
434            type instr                              (* machine instruction *)
435    
436            datatype instruction =
437                LIVE of {regs: C.cellset, spilled: C.cellset}
438              | KILL of {regs: C.cellset, spilled: C.cellset}
439              | COPYXXX of {k: CB.cellkind, dst: CB.cell list, src: CB.cell list}
440              | ANNOTATION of {i: instruction, a: Annotations.annotation}
441              | INSTR of instr
442    
443    This makes the handling of certain special instructions that appear on
444    all architectures easier and uniform.
445    
446    LIVE and KILL say that a list of registers are live or killed at the
447    program point where they appear. No spill code is generated when an
448    element of the 'regs' field is spilled, but the register is moved to
449    the 'spilled' (which is present, more for debugging than anything else).
450    
451    LIVE replaces the (now deprecated) DEFFREG instruction on the alpha.
452    We used to generate:
453    
454            DEFFREG f1
455            f1 := f2 + f3
456            trapb
457    
458    but now generate:
459    
460            f1 := f2 + f3
461            trapb
462            LIVE {regs=[f1,f2,f3], spilled=[]}
463    
464    Furthermore, the DEFFREG (hack) required that all floating point instruction
465    use all registers mentioned in the instruction. Therefore f1 := f2 + f3,
466    defines f1 and uses [f1,f2,f3]! This hack is no longer required resulting
467    in a cleaner alpha implementation. (Hopefully, intel will not get rid of
468    this architecture).
469    
470    COPYXXX is intended to replace the parallel COPY and FCOPY  available on
471    all the architectures. This will result in further simplification of the
472    register allocator that must be aware of them for coalescing purposes, and
473    will also simplify certain aspects of the machine description that provides
474    callbacks related to parallel copies.
475    
476    ANNOTATION should be obvious, and now INSTR represents the honest to God
477    machine instruction set!
478    
479    The <arch>/instructions/<arch>Instr.sml files define certain utility
480    functions for making porting easier -- essentially converting upper case
481    to lower case. All machine instructions (of type instr) are in upper case,
482    and the lower case form generates an MLRISC instruction. For example on
483    the alpha we have:
484    
485      datatype instr =
486         LDA of {r:cell, b:cell, d:operand}
487       | ...
488    
489      val lda : {r:cell, b:cell, d:operand} -> instruction
490        ...
491    
492    where lda is just (INSTR o LDA), etc.
493    
494    ----------------------------------------------------------------------
495    Name: Matthias Blume
496    Date: 2001/11/22 21:40:00 EST
497    Tag: Release_110_37
498    Description:
499    
500    Release 110.37.  This time for real.
501    
502    ----------------------------------------------------------------------
503    Name: Matthias Blume
504    Date: 2001/11/21 16:35:00 EST
505    Tag: blume-20011121-foot-in-mouth
506    Description:
507    
508    Removed the "Release_110_37" tag because of a serious bug.
509    This will be re-tagged once the bug is fixed.
510    
511    ----------------------------------------------------------------------
512    Name: Matthias Blume
513    Date: 2001/11/21 16:14:00 EST
514    Tag: blume-20011121-forgottenfile
515    Description:
516    
517    Forgot to add a file.  (Just a .tex-file -- part of
518    the CM manual source.)
519    
520    ----------------------------------------------------------------------
521    Name: Matthias Blume
522    Date: 2001/11/21 16:10:00 EST
523    Tag: blume-20011121-invalid_110_37
524    Description:
525    
526    Note: I removed the original tag "Release_110_37" from this commit
527          because we found a serious bug in all non-x86 backends.
528          - Matthias
529    
530    1. Modifications to the SML/NJ code generator and to the runtime system
531       so that code object name strings are directly inserted into code
532       objects at code generation time.  The only business the runtime system
533       has with this is now to read the name strings on occasions.
534       (The encoding of the name string has also changed somewhat.)
535    
536    2. CM now implements a simple "set calculus" for specifying export lists.
537       In particular, it is now possible to refer to the export lists of
538       other libraries/groups/sources and form unions as well as differences.
539       See the latest CM manual for details.
540    
541    3. An separate notion of "proxy" libraries has again be eliminated from
542       CM's model.  (Proxy libraries are now simply a special case of using
543       the export list calculus.)
544    
545    4. Some of the existing libraries now take advantage of the new set
546       calculus.
547       (Notice that not all libraries have been converted because some
548       of the existing .cm-files are supposed to be backward compatible
549       with 110.0.x.)
550    
551    5. Some cleanup in stand-alone programs.  (Don't use "exnMessage" -- use
552       "General.exnMessage"!  The former relies on a certain hook to be
553       initialized, and that often does not happen in the stand-alone case.)
554    
555    ----------------------------------------------------------------------
556    Name: Lal George
557    Date: 2001/11/21  13:56:18 EST
558    Tag: george-2001121-pseudo-ops
559    Description:
560    
561      Implemented a complete redesign of MLRISC pseudo-ops. Now there
562      ought to never be any question of incompatabilities with
563      pseudo-op syntax expected by host assemblers.
564    
565      For now, only modules supporting GAS syntax are implemented
566      but more should follow, such as MASM, and vendor assembler
567      syntax, e.g. IBM as, Sun as, etc.
568    
569    ----------------------------------------------------------------------
570    Name: Matthias Blume
571    Date: 2001/11/14 11:52:00 EST
572    Tag: blume-20011114-srcname
573    Description:
574    
575    1. Routed the name of the current source file to mlriscgen where it
576       should be directly emitted into the code object.  (This last part
577       is yet to be done.)
578    
579    2. Some cleanup of the pgraph code to make it match the proposal that
580       I put out the other day.  (The proposal notwithstanding, things are
581       still in flux here.)
582    
583    ----------------------------------------------------------------------
584    Name: Lal George
585    Date: 2001/11/14 09:44:04 EST
586    Tag:
587    Description:
588    
589      Fix for a backpatching bug reported by Allen.
590    
591      Because the boundary between short and long span-dependent
592      instructions is +/- 128, there are an astounding number of
593      span-dependent instructions whose size is over estimated.
594    
595      Allen came up with the idea of letting the size of span
596      dependent instructions be non-monotonic, for a maxIter
597      number of times, after which the size must be monotonically
598      increasing.
599    
600      This table shows the number of span-dependent instructions
601      whose size was over-estimated as a function of maxIter, for the
602      file Parse/parse/ml.grm.sml:
603    
604         maxIter            # of instructions:
605            10                      687
606            20                      438
607            30                      198
608            40                        0
609    
610      In compiling the compiler, there is no significant difference in
611      compilation speed between maxIter=10 and maxIter=40. Actually,
612      my measurements showed that maxIter=40 was a tad faster than
613      maxIter=10! Also 96% of the  files in the compiler reach a fix
614      point within 13 iterations, so fixing maxIter at 40, while high,
615      is okay.
616    
617    ----------------------------------------------------------------------
618    Name: Matthias Blume
619    Date: 2001/10/31 15:25:00 EST
620    Tag: blume-20011031-pgraph
621    Description:
622    
623    CKIT:
624    * Changed the "Function" constructor of type Ast.ctype to carry optional
625      argument identifiers.
626    * Changed the return type of TypeUtil.getFunction accordingly.
627    * Type equality ignores the argument names.
628    * TypeUtil.composite tries to preserve argument names but gives up quickly
629      if there is a mismatch.
630    
631    installation script:
632    * attempts to use "curl" if available (unless "wget" is available as well)
633    
634    CM:
635    * has an experimental implementation of "portable graphs" which I will
636      soon propose as an implementation-independent library format
637    * there are also new libraries $/pgraph.cm and $/pgraph-util.cm
638    
639    NLFFI-LIB:
640    * some cleanup (all cosmetic)
641    
642    NLFFIGEN:
643    * temporarily disabled the mechanism that suppresses ML output for
644      C definitions whose identifiers start with an underscore character
645    * generate val bindings for enum constants
646    * user can request that only one style (light or heavy) is being used;
647      default is to use both (command-line arguments: -heavy and -light)
648    * fixed bug in handling of function types involving incomplete pointers
649    * generate ML entry points that take record arguments (i.e., using
650      named arguments) for C functions that have a prototype with named
651      arguments
652      (see changes to CKIT)
653    
654    ----------------------------------------------------------------------
655    Name: Allen Leung
656    Date: 2001/10/27 20:34:00 EDT
657    Tag: leunga-20011027-x86-fast-fp-call
658    Description:
659    
660       Fixed the bug described in blume-20010920-slowfp.
661    
662       The fix involves
663          1. generating FCOPYs in FSTP in ia32-svid
664          2. marking a CALL with the appropriate annotation
665    
666    ----------------------------------------------------------------------
667    Name: Matthias Blume
668    Date: 2001/10/16 11:32:00 EDT
669    Tag: blume-20011016-netbsd
670    Description:
671    
672    Underscore patch from Chris Richards (fixing problem with compiling
673    runtime system under recent NetBSD).
674    
675    ----------------------------------------------------------------------
676    Name: Allen Leung
677    Date: 2001/10/12 17:18:32 EDT 2001
678    Tag: leung-20011012-x86-printflowgraph
679    Description:
680    
681    X86RA now uses a valid (instead of dummy) PrintFlowgraph module.
682    
683    ----------------------------------------------------------------------
684    Name: Lal George
685    Date: 2001/10/11 23:51:34 EDT
686    Tag: george-20011011-too-many-instrs
687    Description:
688    
689    The representation of a program point never expected to see more
690    than 65536 instructions in a basic block!
691    
692    ----------------------------------------------------------------------
693    Name: Lal George
694    Date: 2001/10/09 09:41:37 EDT
695    Tag: george-20011008-mlrisc-labels
696    Description:
697    
698    Changed the machine description files to support printing of
699    local and global labels in assembly code, based on host assembler
700    conventions.
701    
702    ----------------------------------------------------------------------
703    Name: Matthias Blume
704    Date: 2001/09/25 15:25:00 EDT
705    Tag: blume-20010925-exninfo
706    Description:
707    
708    I provided a non-hook implementation of exnName (at the toplevel) and
709    made the "dummy" implementation of exnMessage (at the toplevel) more
710    useful: if nothing gets "hooked in", then at least you are going to
711    see the exception name and a message indicating why you don't see more.
712    
713    [For the time being, programs that need exnMessage and want to use
714    ml-build should either use General.exnMessage (strongly recommended) or
715    refer to structure General at some other point so that CM sees a
716    static dependency.]
717    
718    [Similar remarks go for "print" and "use":  If you want to use their
719    functionality in stand-alone programs generated by ml-build, then use
720    TextIO.output and Backend.Interact.useFile (from $smlnj/compiler.cm).]
721    
722    ----------------------------------------------------------------------
723    Name: Matthias Blume
724    Date: 2001/09/20 17:28:00 EDT
725    Tag: blume-20010920-slowfp
726    Description:
727    
728    Allen says that x86-fast-fp is not safe yet, so I turned it off again...
729    
730    ----------------------------------------------------------------------
731    Name: Matthias Blume
732    Date: 2001/09/20 17:20:00 EDT
733    Tag: blume-20010920-canonicalpaths
734    Description:
735    
736    0. Updated the BOOT file (something that I forgot to do earlier).
737    
738    1. Small internal change to CM so that it avoids "/../" in filenames
739       as much as possible (but only where it is safe).
740    
741    2. Changed config/_run-sml (resulting in a changed bin/.run-sml) so
742       that arguments that contain delimiters are passed through correctly.
743       This change also means that all "special" arguments of the form
744       @SMLxxx... must come first.
745    
746    3. Changed install script to put relative anchor names for tool commands
747       into pathconfig.
748    
749    ----------------------------------------------------------------------
750    Name: Matthias Blume
751    Date: 2001/09/18 15:35:00 EDT
752    Tag: blume-20010918-readme11036
753    Description:
754    
755    Added README files.
756    
757    ----------------------------------------------------------------------
758    Name: Matthias Blume
759    Date: 2001/09/18 11:45:00 EDT
760    Tag: Release_110_36 (retag)
761    Description:
762    
763    Fixed mistake in config/preloads. Retagged as 110.36.
764    
765    ----------------------------------------------------------------------
766    Name: Matthias Blume
767    Date: 2001/09/18 09:40:00 EDT
768    Tag: Release_110_36_orig (tag changed)
769    Description:
770    
771    New version (110.36).  New bootfiles.
772    
773    ----------------------------------------------------------------------
774    Name: Matthias Blume
775    Date: 2001/09/14 16:15:00 EDT
776    Tag: blume-20010914-x86fastfp
777    Description:
778    
779    John committed some changes that Allen made, in particular a (hopefully)
780    correctly working version of the x86-fp module.
781    
782    I changed the default setting of the Control.MLRISC.getFlag "x86-fast-fp"
783    flag to "true".  Everything seems to compile to a fixpoint ok, and
784    "mandelbrot" speeds up by about 15%.
785    
786    ----------------------------------------------------------------------
787    Name: Matthias Blume
788    Date: 2001/09/13 11:20:00 EDT
789    Tag: blume-20010913-minimal
790    Description:
791    
792    1. Stefan Monnier's patch to fix a miscompilation problem that
793       was brought to light by John Reppy's work on Moby.
794    
795    2. Implemented a minimal "structure Compiler" that contains just
796       "version" and "architecture".  The minimal version will be
797       available when the full version is not.  This is for backward-
798       compatibility with code that wants to test Compiler.version.
799    
800    ----------------------------------------------------------------------
801    Name: Matthias Blume
802    Date: 2001/08/28 14:03:00 EDT
803    Tag: blume-20010828-ml-lex
804    Description:
805    
806    Fix for bug 1581, received from Neophytos Michael.
807    
808    ----------------------------------------------------------------------
809    Name: Matthias Blume
810    Date: 2001/08/27 11:20:00 EDT
811    Tag: blume-20010827-readme11035
812    Description:
813    
814    Fleshed out the README file for 110.35.
815    
816    ----------------------------------------------------------------------
817    Name: Matthias Blume
818    Date: 2001/08/24 17:10:00 EDT
819    Tag: Release_110_35
820    Description:
821    
822    New version number (110.35).  New bootfiles.
823    
824    ----------------------------------------------------------------------
825    Name: Lal George
826    Date: 2001/08/24 13:47:18 EDT 2001
827    Tag: george-20010824-MLRISC-graphs
828    Description:
829    
830     removed clusters from MLRISC completely and replaced with graphs.
831    
832    ----------------------------------------------------------------------
833    Name: Matthias Blume
834    Date: 2001/08/23 17:50:00 EDT
835    Tag: blume-20010823-toplevel
836    Description:
837    
838    - some reorganization of the code that implements various kinds of
839      environments in the compiler (static, dynamic, symbolic, combined)
840    - re-implemented the EnvRef module so that evalStream works properly
841      (if the stream contains references to "use", "CM.make", etc.)
842    - cleaned up evalloop.sml and interact.sml (but they need more cleaning)
843    
844    ----------------------------------------------------------------------
845    Name: Matthias Blume
846    Date: 2001/08/20 15:50 EDT
847    Tag: blume20010820-slipup
848    Description:
849    
850    I forgot to commit a few files.  Here they are...
851    
852    ----------------------------------------------------------------------
853    Name: Matthias Blume
854    Date: 2001/08/20 15:35:00 EDT
855    Tag: blume-20010820-debugprof
856    Description:
857    
858    !!!! NEW BOOTFILES !!!!
859    
860    This is another round of reorganizing the compiler sources.  This
861    time the main goal was to factor out all the "instrumentation"
862    passes (for profiling and backtracing) into their own library.
863    The difficulty was to do it in such a way that it does not depend
864    on elaborate.cm but only on elabdata.cm.
865    
866    Therefore there have been further changes to both elaborate.cm and
867    elabdata.cm -- more "generic" things have been moved from the former
868    to the latter.  As a result, I was forced to split the assignment
869    of numbers indicating "primtyc"s into two portions: SML-generic and
870    SML/NJ-specific.  Since it would have been awkward to maintain,
871    I bit the bullet and actually _changed_ the mapping between these
872    numbers and primtycs.  The bottom line of this is that you need
873    a new set of bin- and bootfiles.
874    
875    I have built new bootfiles for all architectures, so doing a fresh
876    checkout and config/install.sh should be all you need.
877    
878    The newly created library's name is
879    
880        $smlnj/viscomp/debugprof.cm
881    
882    and its sources live under
883    
884        src/compiler/DebugProf
885    
886    ----------------------------------------------------------------------
887    Name: Matthias Blume
888    Date: 2001/08/15 17:15:00 EDT
889    Tag: blume-20010815-compreorg
890    Description:
891    
892    This is a first cut at reorganizing the CM libraries that make up the
893    core of the compiler.  The idea is to separate out pieces that could
894    be used independently by tools, e.g., the parser, the typechecker, etc.
895    
896    The current status is a step in this direction, but it is not quite
897    satisfactory yet.  Expect more changes in the future.
898    
899    Here is the current (new) organization...
900    
901        What used to be $smlnj/viscomp/core.cm is now divided into
902        six CM libraries:
903    
904             $smlnj/viscomp/basics.cm
905                           /parser.cm
906                           /elabdata.cm
907                           /elaborate.cm
908                           /execute.cm
909                           /core.cm
910    
911        The CM files for these libraries live under src/system/smlnj/viscomp.
912        All these libraries are proxy libraries that contain precisely
913        one CM library component.  Here are the locations of the components
914        (all within the src/compiler tree):
915    
916             Basics/basics.cm
917             Parse/parser.cm
918             ElabData/elabdata.cm
919             Elaborator/elaborate.cm
920             Execution/execute.cm
921             core.cm
922    
923         [This organization is the same that has been used already
924         for a while for the architecture-specific parts of the visible
925         compiler and for the old version of core.cm.]
926    
927         As you will notice, many source files have been moved from their
928         respective original locations to a new home in one of the above
929         subtrees.
930    
931         The division of labor between the new libraries is the following:
932    
933             basics.cm:
934                - Simple, basic definitions that pertain to many (or all) of
935                  the other libraries.
936             parser.cm:
937                - The SML parser, producing output of type Ast.dec.
938                - The type family for Ast is also defined and exported here.
939             elabdata.cm:
940                - The datatypes that describe input and output of the elaborator.
941                  This includes types, absyn, and static environments.
942             elaborator.cm:
943                - The SML/NJ type checker and elaborator.
944                  This maps an Ast.dec (with a given static environment) to
945                  an Absyn.dec (with a new static environment).
946                - This libraries implements certain modules that used to be
947                  structures as functors (to remove dependencies on FLINT).
948             execute.cm:
949                - Everything having to do with executing binary code objects.
950                - Dynamic environments.
951             core.cm:
952                - SML/NJ-specific instantiations of the elaborator and MLRISC.
953                - Top-level modules.
954                - FLINT (this should eventually become its own library)
955    
956    Notes:
957    
958    I am not 100% happy with the way I separated the elaborator (and its
959    data structures) from FLINT.  Two instances of the same problem:
960    
961        1. Data structures contain certain fields that carry FLINT-specific
962           information.  I hacked around this using exn and the property list
963           module from smlnj-lib.  But the fact that there are middle-end
964           specific fields around at all is a bit annoying.
965    
966        2. The elaborator calculates certain FLINT-related information.  I tried
967           to make this as abstract as I could using functorization, but, again,
968           the fact that the elaborator has to perform calculations on behalf
969           of the middle-end at all is not nice.
970    
971        3. Having to used exn and property lists is unfortunate because it
972           weakens type checking.  The other alternative (parameterizing
973           nearly *everything*) is not appealing, though.
974    
975    I removed the "rebinding =" warning hack because due to the new organization
976    it was awkward to maintain it.  As a result, the compiler now issues some of
977    these warnings when compiling init.cmi during bootstrap compilation. On
978    the plus side, you also get a warning when you do, for example:
979       val op = = Int32.+
980    which was not the case up to now.
981    
982    I placed "assign" and "deref" into the _Core structure so that the
983    code that deals with the "lazy" keyword can find them there.  This
984    removes the need for having access to the primitive environment
985    during elaboration.
986    
987    ----------------------------------------------------------------------
988    Name: Matthias Blume
989    Date: 2001/08/13
990    Tag: blume-20010813-closures
991    Description:
992    
993    This fix was sent to us by Zhong Shao.  It is supposed to improve the
994    performance of certain loops by avoiding needless closure allocation.
995    
996    ----------------------------------------------------------------------
997    Name: Lal George
998    Date: 2001/07/31 10:03:23 EDT 2001
999    Tag: george-20010731-x86-fmalloc
1000    Description: Fixed bug in x86 calls
1001    
1002        There was a bug where call instructions would mysteriously
1003        vanish. The call instruction had to be one that returned
1004        a floating point value.
1005    
1006    ----------------------------------------------------------------------
1007    Name: Lal George
1008    Date: 2001/07/19 16:36:29 EDT 2001
1009    Tag: george-20010719-simple-cells
1010    Description:
1011    
1012    I have dramatically simplified the interface for CELLS in MLRISC.
1013    
1014    In summary, the cells interface is broken up into three parts:
1015    
1016      1. CellsBasis : CELLS_BASIS
1017    
1018            CellsBasis is a top level structure and common for all
1019            architectures.  it contains the definitions of basic datatypes
1020            and utility  functions over these types.
1021    
1022      2. functor Cells() : CELLS
1023    
1024            Cells generates an interface for CELLS that incorporates the
1025            specific resources on the target architecture, such as the
1026            presence of special register classes, their number and size,
1027            and various useful substructures.
1028    
1029      3. <ARCH>CELLS
1030    
1031            e.g. SparcCells: SPARCCELLS
1032    
1033            <ARCH>CELLS usually contains additional bindings for special
1034            registers  on the architecture, such as:
1035    
1036                    val r0 : cell           (* register zero *)
1037                    val y : cell            (* Y register *)
1038                    val psr : cell          (* processor status register *)
1039                    ...
1040    
1041            The structure returned by applying the Cells functor is opened
1042            in this interface.
1043    
1044    The main implication of all this is that the datatypes for cells is
1045    split between CellsBasis and CELLS -- a fairly simple change for user
1046    code.
1047    
1048    In the old scheme the CELLS interface had a definitional binding of
1049    the form:
1050    
1051            signature CELLS = sig
1052    
1053               structure CellsBasis = CellsBasis
1054    
1055               ...
1056    
1057            end
1058    
1059    With all the sharing constraints that goes on in MLRISC, this old
1060    design  quickly leads to errors such as:
1061    
1062            "structure definition spec inside of sharing ... "
1063    
1064    
1065    and appears to require an unacceptable amount of sharing and where
1066    constraint hackery.
1067    
1068    I think this error message (the interaction of definitional specs and
1069    sharing) requires more explanation on our web page.
1070    
1071    ----------------------------------------------------------------------
1072    Name: Matthias Blume
1073    Date: 2001/07/19 15:00:00 EDT
1074    Tag: blume-20010719-libreorg
1075    Description:
1076    
1077    This update puts together a fairly extensive but straightforward change
1078    to the way the libraries that implement the interactive system are
1079    organized:
1080    
1081       The biggest change is the elimination of structure Compiler.  As a
1082       replacement for this structure, there is now a CM library
1083       (known as $smlnj/compiler.cm or $smlnj/compiler/current.cm)
1084       that exports all the substructures of the original structure Compiler
1085       directly.  So instead of saying Compiler.Foo.bar one now simply
1086       says Foo.bar.  (The CM libraries actually export a collection of
1087       structures that is richer than the collection of substructures of
1088       structure Compiler.)
1089    
1090       To make the transition smooth, there is a separate library called
1091       $smlnj/compiler/compiler.cm which puts together and exports the
1092       original structure Compiler (or at least something very close to it).
1093    
1094       There are five members of the original structure Compiler
1095       that are not exported directly but which instead became members
1096       of a new structure Backend (described by signature BACKEND).  These are:
1097       structure Profile (: PROFILE), structure Compile (: COMPILE), structure
1098       Interact (: INTERACT), structure Machine (: MACHINE), and val
1099       architecture (: string).
1100    
1101       Structure Compiler.Version has become structure CompilerVersion.
1102    
1103       Cross-compilers for alpha32, hppa, ppc, sparc, and x86 are provided
1104       by $smlnj/compiler/<arch>.cm where <arch> is alpha32, hppa, ppc, sparc,
1105       or x86, respectively.
1106       Each of these exports the same frontend structures that
1107       $smlnj/compiler.cm exports.  But they do not have a structure Backend
1108       and instead export some structure <Arch>Backend where <Arch> is Alpha32,
1109       Hppa, PPC, Sparc, or X86, respectively.
1110    
1111       Library $smlnj/compiler/all.cm exports the union of the exports of
1112       $smlnj/compiler/<arch>.cm
1113    
1114       There are no structures <Arch>Compiler anymore, use
1115       $smlnj/compiler/<arch>.cm instead.
1116    
1117       Library host-compiler-0.cm is gone.  Instead, the internal library
1118       that instantiates CM is now called cm0.cm.  Selection of the host
1119       compiler (backend) is no longer done here but. (Responsibility for it
1120       now lies with $smlnj/compiler/current.cm.  This seems to be more
1121       logical.)
1122    
1123       Many individual files have been moved or renamed.  Some files have
1124       been split into multiple files, and some "dead" files have been deleted.
1125    
1126    Aside from these changes to library organization, there are also changes
1127    to the way the code itself is organized:
1128    
1129       Structure Binfile has been re-implemented in such a way that it no
1130       longer needs any knowledge of the compiler.  It exclusively deals
1131       with the details of binfile layout.  It no longer invokes the
1132       compiler (for the purpose of creating new prospective binfile
1133       content), and it no longer has any knowledge of how to interpret
1134       pickles.
1135    
1136       Structure Compile (: COMPILE) has been stripped down to the bare
1137       essentials of compilation.  It no longer deals with linking/execution.
1138       The interface has been cleaned up considerably.
1139    
1140       Utility routines for dealing with linking and execution have been
1141       moved into their own substructures.
1142    
1143       (The ultimate goal of these changes is to provide a light-weight
1144       binfile loader/linker (at least for, e.g., stable libraries) that
1145       does not require CM or the compiler to be present.)
1146    
1147    CM documentation has been updated to reflect the changes to library
1148    organization.
1149    
1150    ----------------------------------------------------------------------
1151    Name: Matthias Blume
1152    Date: 2001/07/10 17:30:00 EDT
1153    Tag: Release_110_34
1154    Description:
1155    
1156    Minor tweak to 110.34 (re-tagged):
1157    
1158      - README.html file added to CVS repository
1159      - runtime compiles properly under FreeBSD 3.X and 4.X
1160    
1161    ----------------------------------------------------------------------
1162    Name: Matthias Blume
1163    Date: 2001/07/10 17:30:00 EDT
1164    Tag: Release_110_34
1165    Description:
1166    
1167    New version number (110.34). New bootfiles.
1168    
1169    ----------------------------------------------------------------------
1170    Name: Matthias Blume
1171    Date: 2001/07/09 16:00:00 EDT
1172    Tag: blume-20010709-more-varargs
1173    Description:
1174    
1175    I changed the handling of varargs in ml-nlffigen again:
1176    The ellipsis ... will now simply be ignored (with an accompanying warning).
1177    
1178    The immediate effect is that you can actually call a varargs function
1179    from ML -- but you can't actually supply any arguments beyond the ones
1180    specified explicitly.  (For example, you can call printf with its format
1181    string, but you cannot pass additional arguments.)
1182    
1183    This behavior is only marginally more useful than the one before, but
1184    it has the advantage that a function or, more importantly, a function
1185    type never gets dropped on the floor, thus avoiding follow-up problems with
1186    other types that refer to the offending one.
1187    
1188    ----------------------------------------------------------------------
1189    Name: Matthias Blume
1190    Date: 2001/07/09 11:25:00 EDT
1191    Tag: blume-20010709-varargs
1192    Description:
1193    
1194    1. ckit-lib.cm now exports structure Error
1195    2. ml-nlffigen reports occurences of "..." (i.e., varargs function types)
1196       with a warning accompanied by a source location.  Moreover, it
1197       merely skips the offending function or type and proceeds with the
1198       rest of its work.u  As a result, one can safely feed C code containing
1199       "..." to ml-nlffigen.
1200    3. There are some internal improvements to CM, providing slightly
1201       more general string substitutions in the tools subsystem.
1202    
1203    ----------------------------------------------------------------------
1204    Name: Matthias Blume
1205    Date: 2001/06/27 15:10:00 EDT
1206    Tag: blume-20010627-concur
1207    Description:
1208    
1209    Fixed a small bug in CM's handling of parallel compilation.
1210    (You could observe the bug by Control-C-interrupting an ordinary
1211    CMB.make or CM.stabilize and then attaching some compile servers.
1212    The result was that all of a sudden the previously interrupted
1213    compilation would continue on its own.  This was because of
1214    an over-optimization: CM did not bother to clean out certain queues
1215    when no servers were attached "anyway", resulting in the contents
1216    of these queues to grab control when new servers did get attached.)
1217    
1218    There is also another minor update to the CM manual.
1219    
1220    ----------------------------------------------------------------------
1221    Name: Matthias Blume
1222    Date: 2001/06/26 16:15:00 EDT
1223    Tag: blume-20010626-cmdoc
1224    Description:
1225    
1226    Minor typo fixed in CM manual (syntax diagram for libraries).
1227    
1228    ----------------------------------------------------------------------
1229    Name: Matthias Blume
1230    Date: 2001/06/25 22:55:00 EDT
1231    Tag: blume-20010625-x86pc
1232    Description:
1233    
1234    Fixed a nasty bug in the X86 assembly code that caused signal
1235    handlers to fail (crash) randomly.
1236    
1237    ----------------------------------------------------------------------
1238    Name: Matthias Blume
1239    Date: 2001/06/25 12:05:00 EDT
1240    Tag: blume-20010625-nlffigen
1241    Description:
1242    
1243    This update fixes a number of minor bugs in ml-nlffigen as reported by
1244    Nick Carter <nbc@andrew.cmu.edu>.
1245    
1246      1. Silly but ok typedefs of the form "typedef void myvoid;" are now accepted.
1247      2. Default names for generated files are now derived from the name of
1248         the C file *without its directory*.  In particular, this causes generated
1249         files to be placed locally even if the C file is in some system directory.
1250      3. Default names for generated signatures and structures are also derived
1251         from the C file name without its directory.  This avoids silly things
1252         like "structure GL/GL".
1253         (Other silly names are still possible because ml-nlffigen does not do
1254          a thorough check of whether generated names are legal ML identifiers.
1255          When in doubt, use command line arguments to force particular names.)
1256    
1257    ----------------------------------------------------------------------
1258    Name: Matthias Blume
1259    Date: 2001/06/21 12:25:00 EDT
1260    Tag: blume-20010621-eXene
1261    Description:
1262    
1263    eXene now compiles and (sort of) works again.
1264    
1265    The library name (for version > 110.33) is $/eXene.cm.
1266    
1267    I also added an new example in src/eXene/examples/nbody.  See the
1268    README file there for details.
1269    
1270    ----------------------------------------------------------------------
1271    Name: Matthias Blume
1272    Date: 2001/06/20 16:40:00 EDT
1273    Tag: blume-20010620-cml
1274    Description:
1275    
1276    CML now compiles and works again.
1277    
1278    Libraries (for version > 110.33):
1279    
1280      $cml/cml.cm            Main CML library.
1281      $cml/basis.cm          CML's version of $/basis.cm.
1282      $cml/cml-internal.cm   Internal helper library.
1283      $cml/core-cml.cm       Internal helper library.
1284      $cml-lib/trace-cml.cm  Tracing facility.
1285      $cml-lib/smlnj-lib.cm  CML's version of $/smlnj-lib.cm
1286    
1287    The installer (config/install.sh) has been taught how to properly
1288    install this stuff.
1289    
1290    ----------------------------------------------------------------------
1291    Name: Matthias Blume
1292    Date: 2001/06/19 17:55:00 EDT
1293    Tag: blume-20010619-instantiate
1294    Description:
1295    
1296    This un-breaks the fix for bug 1432.
1297    (The bug was originally fixed in 110.9 but I broke it again some
1298    time after that.)
1299    
1300    ----------------------------------------------------------------------
1301    Name: Matthias Blume
1302    Date: 2001/06/19 17:25:00 EDT
1303    Tag: blume-20010619-signals
1304    Description:
1305    
1306    This should (hopefully) fix the long-standing signal handling bug.
1307    (The runtime system was constructing a continuation record with an
1308    incorrect descriptor which would cause the GC to drop data on the floor...)
1309    
1310    ----------------------------------------------------------------------
1311    Name: Matthias Blume
1312    Date: 2001/06/15 15:05:00 EDT
1313    Tag: blume-20010615-moresparc
1314    Description:
1315    
1316    Here is a short late-hour update related to Sparc c-calls:
1317    
1318     -- made handling of double-word arguments a bit smarter
1319    
1320     -- instruction selection phase tries to collapse certain clumsily
1321        constructed ML-Trees; typical example:
1322    
1323            ADD(ty,ADD(_,e,LI d1),LI d2)  ->  ADD(ty,e,LI(d1+d2))
1324    
1325        This currently has no further impact on SML/NJ since mlriscGen does
1326        not seem to generate such patterns in the first place, and c-calls
1327        (which did generate them in the beginning) has meanwhile been fixed
1328        so as to avoid them as well.
1329    
1330    ----------------------------------------------------------------------
1331    Name: Matthias Blume
1332    Date: 2001/06/15 15:05:00 EDT
1333    Tag: blume-20010615-sparc
1334    Description:
1335    
1336    The purpose of this update is to provide an implementation of NLFFI
1337    on Sparc machines.
1338    
1339    Here are the changes in detail:
1340    
1341       * src/MLRISC/sparc/c-calls/sparc-c-calls.sml is a new file containing
1342       the Sparc implementation of the c-calls API.
1343       * The Sparc backend of SML/NJ has been modified to uniformely use %fp
1344       for accessing the ML frame.  Thus, we have a real frame pointer and
1345       can freely modify %sp without need for an omit-frame-ptr phase.
1346       The vfp logic in src/compiler/CodeGen/* has been changed to accomodate
1347       this case.
1348       * ml-nlffigen has been taught to produce code for different architectures
1349       and calling conventions.
1350       * In a way similar to what was done in the x86 case, the Sparc
1351       backend uses its own specific extension to mltree.  (For example,
1352       it needs to be able to generate UNIMP instructions which are part
1353       of the calling convention.)
1354       * ml-nlffi-lib was reorganized to make it more modular (in particular,
1355       to make it easier to plug in new machine- and os-dependent parts).
1356    
1357    There are some other fairly unrelated bug fixes and cleanups as well:
1358    
1359       * I further hacked the .cm files for MLRISC tools (like MDLGen) so
1360       that they properly share their libraries with existing SML/NJ libraries.
1361       * I fixed a minor cosmetic bug in CM, supressing certain spurious
1362       follow-up error messages.
1363       * Updates to CM/CMB documentation.
1364    
1365    TODO items:
1366    
1367       * MLRISC should use a different register as its asmTemp on the Sparc.
1368         (The current %o2 is a really bad choice because it is part of the
1369         calling conventions, so things might interfere in unexpected ways.)
1370    
1371    ----------------------------------------------------------------------
1372    Name: Matthias Blume
1373    Date: 2001/06/07
1374    Tag: blume-20010607-calls
1375    Description:
1376    
1377    A number of internal changes related to C calls and calling conventions:
1378    
1379    1. ML-Tree CALL statements now carry a "pops" field.  It indicates the
1380       number of bytes popped implicitly (by the callee).  In most cases
1381       this field is 0 but on x86/win32 it is some non-zero value.  This
1382       is information provided for the benefit of the "omit-frameptr" pass.
1383    2. The CALL instruction on the x86 carries a similar "pops" field.
1384       The instruction selection phase copies its value from the ML-Tree
1385       CALL statement.
1386    3. On all other architectures, the instruction selection phase checks
1387       whether "pops=0" and complains if not.
1388    4. The c-calls implementation for x86 now accepts two calling conventions:
1389       "ccall" and "stdcall".  When "ccall" is selected, the caller cleans
1390       up after the call and pops is set to 0.  For "stdcall", the caller
1391       does nothing, leaving the cleanup to the callee; pops is set to
1392       the number of bytes that were pushed onto the stack.
1393    5. The cproto decoder (compiler/Semant/types/cproto.sml) now can
1394       distinguish between "ccall" and "stdcall".
1395    6. The UNIMP instruction has been added to the supported Sparc instruction
1396       set. (This is needed for implementing the official C calling convention
1397       on this architecture.)
1398    7. I fixed some of the .cm files under src/MLRISC/Tools to make them
1399       work with the latest CM.
1400    
1401    ----------------------------------------------------------------------
1402    Name: Matthias Blume
1403    Date: 2001/06/05 15:10:00 EDT
1404    Tag: blume-20010605-cm-index
1405    Description:
1406    
1407    0. The "lambdasplit" parameter for class "sml" in CM has been documented.
1408    
1409    1. CM can now generate "index files".  These are human-readable files
1410       that list on a per-.cm-file basis each toplevel symbol defined or
1411       imported.  The location of the index file for
1412       <p>/<d>.cm is <p>/CM/INDEX/<d>.cm.
1413       To enable index-file generation, set CM.Control.generate_index to true
1414       or export an environment-symbol: export CM_GENERATE_INDEX=true.
1415    
1416       The CM manual has been updated accordingly.
1417    
1418    2. I made some slight modifications to the c-calls API in MLRISC.
1419    
1420         a) There is now a callback to support saving/restoring of
1421            dedicated but caller-save registers around the actual call
1422            instruction.
1423         b) One can optionally specify a comment-annotation for the
1424            call instruction.
1425    
1426    3. SML/NJ (mlriscGen.sml) uses this new API for the rawccall primop.
1427       (For example, the comment annotation shows the C prototype of
1428        the function being called.)
1429    
1430    ----------------------------------------------------------------------
1431    Name: Matthias Blume
1432    Date: 2001/06/01 13:30:00 EDT
1433    Tag: blume-20010601-nlffi-cleanup
1434    Description:
1435    
1436    This is mostly a cleanup of MLFFI stuff:
1437    
1438       - some signature files have been put into a more exposed place
1439       - the ugly 'f type parameter is gone (simplifies types tremendously!)
1440       - ml-nlffigen changed accordingly
1441       - tutorial updated
1442    
1443    Other changes:
1444    
1445       - author's affiliation in CM manual(s) updated
1446       - some more recognized keywords added to Allen's sml.sty
1447    
1448    ----------------------------------------------------------------------
1449    Name: Matthias Blume
1450    Date: 2001/05/25 15:30:00 EDT
1451    Tag: blume-20010525-iptr
1452    Description:
1453    
1454      - put the official 110.33-README (as it appears on the ftp server) under
1455        CVS
1456      - fixed a small bug related to incomplete pointer types in
1457        ml-nlffigen
1458      - small cosmetic change to the ml-nlffi-lib's "arr" type constructor
1459        (it does not need the 'f type parameter)
1460    
1461    ----------------------------------------------------------------------
1462    Name: Matthias Blume
1463    Date: 2001/05/23 14:30:00 EDT
1464    Tag: Release_110_33
1465    Description:
1466    
1467    New version number (110.33).  New bootfiles.
1468    
1469    ----------------------------------------------------------------------
1470    Name: Matthias Blume
1471    Date: 2001/05/22 18:06:00 EDT
1472    Tag: blume-20010522-targets
1473    Description:
1474    
1475    Made install.sh use file config/targets.customized if it exists, falling
1476    back to config/targets if it doesn't.  This way one can have a customized
1477    version of the targets file without touching the "real thing", thus
1478    eliminating the constant fear of accidentally checking something bogus
1479    back into the CVS repository...  (File config/targets.customized must
1480    not be added to the repository!)
1481    
1482    ----------------------------------------------------------------------
1483    Name: Matthias Blume
1484    Date: 2001/05/22 16:30:00 EDT
1485    Tag: blume-20010522-minitut
1486    Description:
1487    
1488    1. Bug fix in ml-nlffigen; now (hopefully) correctly handling
1489       struct returns.
1490    2. Added src/ml-nlffi-lib/Doc/mini-tutorial.txt.  This is some very
1491       incomplete, preliminary documentation for NLFFI.
1492    
1493    ----------------------------------------------------------------------
1494    Name: Matthias Blume
1495    Date: 2001/05/14 11:30:00 EDT
1496    Tag: blume-20010514-script
1497    Description:
1498    
1499    Some bugs in install script fixed.
1500    
1501    In addition to that I also made a slight change to the NLFFI API:
1502    Functors generated by ml-nlffigen now take the dynamic library as a
1503    straight functor argument, not as a suspended one.  (The original
1504    functor code used to force the suspension right away anyway, so there
1505    was nothing gained by this complication of the interface.)
1506    
1507    ----------------------------------------------------------------------
1508    Name: Matthias Blume
1509    Date: 2001/05/11 14:35:00 EDT
1510    Tag: blume-20010511-ml-nlffi
1511    Description:
1512    
1513    I finally took the plunge and added my new FFI code to the main
1514    repository.  For x86-linux it is now ready for prime-time.
1515    
1516    There are two new subdirectories of "src":
1517    
1518      - ml-nlffi-lib:
1519           The utility library for programs using the FFI interface.
1520           Here is the implementation of $/c.cm and its associated low-level
1521           partners $/c-int.cm and $/memory.cm.
1522      - ml-nlffigen:
1523           A stand-alone program for generating ML glue code from C source
1524           code.
1525    
1526    Building ml-nlffigen requires $/ckit-lib.cm.
1527    
1528    The config/install.sh script has been updates to do the Right Thing
1529    (hopefully).
1530    
1531    Notice that the source tree for the C-Kit will not be put under "src"
1532    but directly under the installation root directory.  (This is the
1533    structure that currently exists on the CVS server when you check out
1534    module "sml".)  Fortunately, config/install.sh knows about this oddity.
1535    
1536    Bugs: No documentation yet.
1537    
1538    ----------------------------------------------------------------------
1539    Name: Matthias Blume
1540    Date: 2001/05/09 16:35:00 EDT
1541    Tag: blume-20010509-cpscontract
1542    Description:
1543    
1544    Fixed a bug in the accounting code in cpsopt/contract.sml.  (The
1545    wrapper/unwrapper elimination did not decrement usage counts and some
1546    dead variables got overlooked by the dead-up logic.)
1547    
1548    ----------------------------------------------------------------------
1549    Name: Lal George
1550    Date: 2001/05/08  17:26:09 EDT
1551    Tag: george-20010508-omit-frameptr
1552    Description:
1553    
1554    Changes to implement the omit-frame-pointer optimization to support
1555    raw C calls. For now, there is only support on the Intel x86, but
1556    other architectures will follow as more experience is gained with this.
1557    
1558    
1559    ----------------------------------------------------------------------
1560    Name: Matthias Blume
1561    Date: 2001/05/07 14:40:00 EDT
1562    Tag: blume-20010507-proxies
1563    Description:
1564    
1565    I made into "proxy libraries" all libraries that qualify for such a
1566    change.  (A qualifying library is a library that has another library or
1567    groups as its sole member and repeats that member's export list
1568    verbatim.  A proxy library avoids this repetition by omitting its export
1569    list, effectively inheriting the list that its (only) member exports.
1570    See the CM manual for more explanation.)
1571    The main effect is that explicit export lists for these libraries
1572    do not have to be kepts in sync, making maintenance a bit easier.
1573    
1574    I also added copyright notices to many .cm-files.
1575    
1576    Last but not least, I made a new set of bootfiles.
1577    
1578    ----------------------------------------------------------------------
1579    Name: Matthias Blume
1580    Date: 2001/05/04 17:00:00 EDT
1581    Tag: blume-20010504-cm-lsplit
1582    Description:
1583    
1584    0. John merged pending changes to $/smlnj-lib.cm
1585    
1586    1. Allen's previous change accidentally backed out of one of Lal's
1587       earlier changes.  I undid this mistake (re-introducing Lal's change).
1588    
1589    2. I used the new topOrder' function from graph-scc.sml (from $/smlnj-lib.cm)
1590       within the compiler where applicable.  There is some code simplification
1591       because of that.
1592    
1593    3. The "split" phase (in FLINT) is now part of the default list of phases.
1594       Compiler.Control.LambdaSplitting.* can be used to globally control the
1595       lambda-splitting (cross-module-inlining) engine.  In addition to that,
1596       it can now also be controlled on a per-source basis: CM has been taught
1597       a new tool parameter applicable to ML source files.
1598    
1599       - To turn lambda-splitting off completely:
1600            local open Compiler.Control.LambdaSplitting in
1601                val _ = set Off
1602            end
1603       - To make "no lambda-splitting" the global default (but allow per-source
1604         overriding); this is the initial setting:
1605            local open Compiler.Control.LambdaSplitting in
1606                val _ = set (Default NONE)
1607            end
1608       - To make "lambda-splitting with aggressiveness a" the global default
1609         (and allow per-source overriding):
1610            local open Compiler.Control.LambdaSplitting in
1611                val _ = set (Default (SOME a))
1612            end
1613    
1614       - To turn lambda-splitting off for a given ML souce file (say: a.sml)
1615         write (in the respective .cm-file):
1616            a.sml (lambdasplitting:off)
1617       - To turn lambda-splitting for a.sml on with minimal aggressiveness:
1618            a.sml (lambdasplitting:on)
1619       - To turn lambda-splitting for a.sml on with aggressiveness <a> (where
1620         <a> is a decimal non-negative integer):
1621            a.sml (lambdasplitting:<a>)
1622       - To turn lambda-splitting for a.sml on with maximal aggressiveness:
1623            a.sml (lambdasplitting:infinity)
1624       - To use the global default for a.sml:
1625            a.sml (lambdasplitting:default)
1626         or simply
1627            a.sml
1628    
1629    ----------------------------------------------------------------------
1630    Name: Allen Leung
1631    Date: 2001/05/04 01:57:00 EDT
1632    Tag: leunga-20010504-sync
1633    Description:
1634    
1635      MLRISC features.
1636    
1637      1. Fix to CMPXCHG instructions.
1638      2. Changed RA interface to allow annotations in callbacks.
1639      3. Added a new method to the stream interface to allow annotations updates.
1640    
1641    ----------------------------------------------------------------------
1642    Name: Matthias Blume
1643    Date: 2001/05/01 11:45:00 EDT
1644    Tag: blume-20010501-pcedittmp
1645    Description:
1646    
1647    Changed install.sh to use the current working directory instead of
1648    /usr/tmp for a temporary file (pcedittmp).  The previous choice
1649    of /usr/tmp caused trouble with MacOS X because of file premission
1650    problems.
1651    
1652    ----------------------------------------------------------------------
1653    Name: Matthias Blume
1654    Date: 2001/04/20 11:10:00 EDT
1655    Tag: blume-20010420-inMLflag
1656    Description:
1657    
1658     - added vp_limitPtrMask to vproc-state.h
1659       (for use by the raw-C-calls mechanism to implement proper interrupt
1660        handling)
1661     - made the ML compiler aware of various data-structure offsets so it
1662       can generate code for accessing the vp_inML flag and vp_limitPtrMask
1663     - tweaked mlriscGen.sml to have it emit interrupt-handling code for
1664       raw C-calls
1665    
1666    ----------------------------------------------------------------------
1667    Name: Lal George
1668    Date: 2001/04/20 09:15:28 EDT
1669    Tag: george-20010420-macosX
1670    Description:
1671    
1672     - Changes to port to Mac OS X; Darwin.
1673    
1674     - In the process I found that sqrt was broken on the PPC, because the
1675       fsqrt instruction is not implemented.
1676    
1677    ----------------------------------------------------------------------
1678    Name: Matthias Blume
1679    Date: 2001/04/18 12:45:00 EDT
1680    Tag: blume-20010418-ccalls
1681    Description:
1682    
1683     - fixed two off-by-4 errors in the x86-specific c-calls implementation
1684       (this bug prevented structure arguments containing pointers from being
1685        passed correctly)
1686     - changed the raw-C-call code in mlriscGen.sml in such a way that
1687       structure arguments are represented as a pointer to the beginning
1688       of the structure (instead of having a series of synthesized arguments,
1689       one for each structure member)
1690    
1691     - made makeml script's verbosity level configurable via environment
1692       variable (MAKEML_VERBOSITY)
1693    
1694     - eliminated placeholder implementations for f32l, w16s, i16s, and f32s
1695       in rawmem-x86.sml; we are now using the real thing
1696    
1697    ----------------------------------------------------------------------
1698    Name: Matthias Blume
1699    Date: 2001/03/22 16:25:00 EST
1700    Tag: blume-20010322-bootfiles
1701    Description:
1702    
1703    Created a new set of bootfiles (for your automatic installation convenience).
1704    
1705    ----------------------------------------------------------------------
1706    Name: Matthias Blume
1707    Date: 2001/03/22 15:10:00 EST
1708    Tag: blume-20010322-rawmem-parcm
1709    Description:
1710    
1711    1. All "raw memory access" primitives for the new FFI are implemented now
1712       (at least on the x86).
1713    2. Some further cleanup of CM's parallel make mechanism.
1714    
1715    ----------------------------------------------------------------------
1716    Name: Matthias Blume
1717    Date: 2001/03/19 17:53:00 EST
1718    Tag: blume-20010319-parallel
1719    Description:
1720    
1721    Parallel make (using compile servers) now works again.
1722    
1723    To this end, CM.stabilize and CMB.make have been modified to work in
1724    two passes when compile servers are attached:
1725       1. Compile everything, do not perform stabilization; this pass
1726          uses compile servers
1727       2. Stabilize everything; this pass does not use compile servers
1728    If there are no compile servers, the two passes are combined into one
1729    (as before).  Splitting the passes increases the inherent parallelism
1730    in the dependency graph because the entire graph including all
1731    libraries is available at the same time.  This, in turn, improves
1732    server utilization.  The downside is that the master process will
1733    have to do some extra work after compilation is done (because for
1734    technical reasons it must re-read all the binfiles during stabilization).
1735    
1736    ----------------------------------------------------------------------
1737    Name: Matthias Blume
1738    Date: 2001/03/16 12:22:00 EST
1739    Tag: blume-20010316-bootfiles
1740    Description:
1741    
1742    Created a new set of bootfiles (for your automatic installation convenience).
1743    
1744    ----------------------------------------------------------------------
1745    Name: Matthias Blume
1746    Date: 2001/03/16 11:00:00 EST
1747    Tag: blume-20010316-MLTREE-fixup
1748    Description:
1749    
1750    This is a minor fixup for an (untagged) earlier commit by Allen.
1751    (A file was missing).
1752    
1753    ----------------------------------------------------------------------
1754    Name: Allen Leung
1755    Date: Mon Mar  5 18:54:57 EST 2001
1756    Tag: leunga-20010305-cut-support
1757    
1758    1. New support for alternative control-flow in MLTREE.
1759       Currently we support
1760    
1761          FLOW_TO(CALL ...., [k1,...,kn])
1762    
1763       This is needed for 'cuts to' in C-- and try/handle-like constructs
1764       in Moby
1765    
1766       New assembler flag "asm-show-cutsto" to turn on control-flow debugging.
1767    
1768    2. Register Allocator
1769    
1770       Changes in interface [from Fermin, John]
1771    
1772    3. Alpha 8-bit SLL support [Fermin]
1773    
1774    4. All architectures
1775    
1776       A new module (ClusterExpandCopies) for expanding parallel copies.
1777    
1778    ----------------------------------------------------------------------
1779    Name: Allen Leung
1780    Date: 2001/02/27 23:07:00 EST
1781    Tag: leunga-20010227-minor-stuff
1782    
1783    1. Alpha bug fix for CMOVNE
1784    2. Handle mltree COND(..,FCMP ...,...)
1785    3. Bug fix in simplifier
1786    
1787    ----------------------------------------------------------------------
1788    Name: Matthias Blume
1789    Date: 2001/01/30 17:50:00 EST
1790    Tag: blume-20010130-sync
1791    Description:
1792    
1793    This is just a minor update to sync my devel branch with the main brach.
1794    The only visible change is the addition of some README files.
1795    
1796    ----------------------------------------------------------------------
1797    Name: Matthias Blume
1798    Date: 2001/01/12 23:30:00 JST
1799    Tag: blume-20010112-bootfiles
1800    Description:
1801    
1802    Made a new set of bootfiles that goes with the current state of the
1803    repository.
1804    
1805    ----------------------------------------------------------------------
1806    Name: Matthias Blume
1807    Date: 2001/01/12 21:20:00 JST
1808    Tag: blume-20010112-sync
1809    Description:
1810    
1811    I am just flushing out some minor changes that had accumulated in
1812    my private branch in order to sync with the main tree.  (This is
1813    mainly because I had CVS trouble when trying to merge _into_ my
1814    private branch.)
1815    
1816    Most people should be completely unaffected by this.
1817    
1818    ----------------------------------------------------------------------
1819    Name: Allen Leung
1820    Date: Thu Jan 11 21:03:00 EST 2001
1821    Tag: leunga-20010111-labexp=mltree
1822    Description:
1823    
1824    1.  Removed the type LabelExp and replace it by MLTree.
1825    2.  Rewritten mltree-simplify with the pattern matcher tool.
1826    3.  There were some bugs in alpha code generator which would break
1827        64-bit code generation.
1828    4.  Redo the tools to generate code with the
1829    5.  The CM files in MLRISC (and in src/system/smlnj/MLRISC)
1830        are now generated by perl scripts.
1831    
1832    ----------------------------------------------------------------------
1833    Name: Matthias Blume
1834    Date: 2001/01/10 21:55:00 JST
1835    Tag: blume-20010110-rcc
1836    Description:
1837    
1838    The RCC stuff now seems to work (but only on the x86).
1839    This required hacking of the c-calls interface (and -implementation) in
1840    MLRISC.
1841    
1842    Normal compiler users should be unaffected.
1843    
1844    ----------------------------------------------------------------------
1845    Name: Matthias Blume
1846    Date: 2001/01/09 01:20:00 JST
1847    Tag: blume-20010109-rcc
1848    Description:
1849    
1850    This is a fairly big patch, flushing out a large number of pending
1851    changes that I made to my development copy over the last couple of days.
1852    
1853    Of practical relevance at this moment is a workaround for a pickling
1854    bug that Allen ran into the other day.  The cause of the bug itself is
1855    still unknown and it might be hard to fix it properly, but the
1856    workaround has some merits of its own (namely somewhat reducing pickling
1857    overhead for certain libraries).  Therefore, I think this solution should
1858    be satisfactory at this time.
1859    
1860    The rest of the changes (i.e., the vast majority) has to do with my
1861    ongoing efforts of providing direct support for C function calls from
1862    ML.  At the moment there is a new primop "RAW_CCALL", typing magic
1863    in types/cproto.sml (invoked from FLINT/trans/translate.sml), a new
1864    case in the FLINT CPS datatype (RCC), changes to cps/convert.sml to
1865    translate uses of RAW_CCALL into RCC, and changes to mlriscGen.sml to
1866    handle RCC.
1867    
1868    The last part (the changes to mlriscGen.sml) are still known to be
1869    wrong on the x86 and not implemented on all other architectures.  But
1870    the infrastructure is in place. I had to change a few functor
1871    signatures in the backend to be able to route the CCalls interface
1872    from MLRISC there, and I had to specialize the mltree type (on the
1873    x86) to include the necessary extensions. (The extensions themselves
1874    were already there and redy to go in MLRISC/x86).
1875    
1876    Everything should be very happy as soon as someone helps me with
1877    mlriscGen.sml...
1878    
1879    In any case, nothing of this should matter to anyone as long as the
1880    new primop is not being used (which is going to be the case unless you
1881    find it where I hid it :). The rest of the compiler is completely
1882    unaffected.
1883    
1884    ----------------------------------------------------------------------
1885    Name: Matthias Blume
1886    Date: 2001/01/05 00:30:00 JST
1887    Tag: blume-20010105-primops
1888    Description:
1889    
1890    Added some experimental support for work that I am doing right now.
1891    These changes mostly concern added primops, but there is also a new
1892    experimental C library in the runtime system (but currently not enabled
1893    anywhere except on Linux/X86).
1894    
1895    In the course of adding primops (and playing with them), I discovered that
1896    Zhong's INL_PRIM hack (no type info for certain primops) was, in fact, badly
1897    broken.  (Zhong was very right he labeled this stuff as "major gross hack".)
1898    To recover, I made type information in INL_PRIM mandatory and changed
1899    prim.sml as well as built-in.sml accordingly.  The InLine structure now
1900    has complete, correct type information (i.e., no bottom types).
1901    
1902    Since all these changes mean that we need new binfiles, I also bumped the
1903    version number to 110.32.1.
1904    
1905    ----------------------------------------------------------------------
1906    Name: Matthias Blume
1907    Date: 2000/12/30 22:10:00 JST
1908    Tag: blume-20001230-various
1909    Description:
1910    
1911    Added proxy libraries for MLRISC and let MLRISC libraries refer
1912    to each other using path anchors.  (See CM manual for explanation.)
1913    
1914    Updated CM documentation.
1915    
1916    Fixed some bugs in CM.
1917    
1918    Implemented "proxy" libraries (= syntactic sugar for CM).
1919    
1920    Added "-quiet" option to makeml and changed runtime system accordingly.
1921    
1922    Added cleanup handler for exportML to reset timers and compiler stats.
1923    
1924    ----------------------------------------------------------------------
1925    Name: Lal George
1926    Date: 2000/12/22 22:22:58 EST 2000
1927    Tag: Release_110_32
1928    Description:
1929    
1930            Infinite precision used throughout MLRISC.
1931            see MLRISC/mltree/machine-int.sig
1932    
1933    ----------------------------------------------------------------------
1934    Name: Matthias Blume
1935    Date: 2000/12/22 23:16:00 JST
1936    Tag: blume-20001222-warn
1937    Description:
1938    
1939    Corrected wording and formatting of some CM warning message which I
1940    broke in my previous patch.
1941    
1942    ----------------------------------------------------------------------
1943    Name: Matthias Blume
1944    Date: 2000/12/22 21:20:00 JST
1945    Tag: blume-20001222-anchorenv
1946    Description:
1947    
1948    Fixed CM's handling of anchor environments in connection with CMB.make.
1949    
1950    ----------------------------------------------------------------------
1951    Name: Matthias Blume
1952    Date: 2000/12/22 13:15:00 JST
1953    Tag: blume-20001222-cleanup
1954    Description:
1955    
1956    Removed src/cm/ffi which does not (and did not) belong here.
1957    
1958    ----------------------------------------------------------------------
1959    Name: Matthias Blume
1960    Date: 2000/12/21 23:55:00 JST
1961    Tag: blume-20001221-exn
1962    Description:
1963    
1964    Probably most important: CM no longer silently swallows all exceptions
1965    in the compiler.
1966    Plus: some other minor CM changes.  For example, CM now reports some
1967    sizes for generated binfiles (code, data, envpickle, lambdapickle).
1968    
1969    ----------------------------------------------------------------------
1970    Name: Matthias Blume
1971    Date: 2000/12/15 00:01:05 JST
1972    Tag: blume-20001215-dirtool
1973    Description:
1974    
1975    - "dir" tool added.
1976    - improvements and cleanup to Tools structure
1977    - documentation updates
1978    
1979    ----------------------------------------------------------------------
1980    Name: Allen Leung
1981    Date: Thu Dec 14 03:45:24 EST 2000
1982    Description:
1983    Tag:  leunga-20001214-int-inf
1984    Description:
1985    
1986       In IntInf, added these standard functions, which are missing from our
1987    implementation:
1988    
1989        andb : int * int -> int
1990        xorb : int * int -> int
1991        orb  : int * int -> int
1992        notb : int -> int
1993         <<   : int * word -> int
1994        ~>>  : int * word -> int
1995    
1996       Not tested, I hope they are correct.
1997    
1998    ----------------------------------------------------------------------
1999    Name: Allen Leung
2000    Date: Fri Dec  8 19:23:26 EST 2000
2001    Description:
2002    Tag:  leunga-20001208-nowhere
2003    Description:
2004    
2005      Slight improvements to the 'nowhere' tool to handle OR-patterns,
2006    to generate better error messages etc.  Plus a brief manual.
2007    
2008  ----------------------------------------------------------------------  ----------------------------------------------------------------------
2009  Name: Lal George  Name: Lal George
2010  Date: 2000/12/08 09:54:02 EST 2000  Date: 2000/12/08 09:54:02 EST 2000
# Line 1730  Line 3724 
3724       elaborator). There were a lot of changes during my "linkpath" trials       elaborator). There were a lot of changes during my "linkpath" trials
3725       that could have been reverted to their original state but weren't.       that could have been reverted to their original state but weren't.
3726       Please, don't be too harsh on me for messing with this code a bit more       Please, don't be too harsh on me for messing with this code a bit more
3727       than what was strictly necessary...  (I _did_ resist the tempation       than what was strictly necessary...  (I _did_ resist the temptation
3728       of doing any "global reformatting" to avoid an untimely death at       of doing any "global reformatting" to avoid an untimely death at
3729       Dave's hands. :)       Dave's hands. :)
3730    

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