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Diff of /sml/trunk/NOTES/HISTORY

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revision 577, Fri Mar 10 08:07:18 2000 UTC revision 672, Mon Jun 19 04:40:29 2000 UTC
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13  Description:  Description:
14  ----------------------------------------------------------------------  ----------------------------------------------------------------------
15  Name: Matthias Blume  Name: Matthias Blume
16    Date: 2000/06/19 13:40:00
17    Tag: blume-20000619-manual
18    Description:
19    
20    CM manual and system/README update.  This only covers the fact that
21    there are no more implicit anchors.  (Path environments and the "bind"
22    option to "cm" have yet to be documented.)
23    
24    ----------------------------------------------------------------------
25    Name: Matthias Blume
26    Date: 2000/06/19 11:05:00 JST
27    Tag: blume-20000619-chdir-bugfix
28    Description:
29    
30    Fixed a bug in new SrcPath module that sometimes led to a bad chDir call.
31    
32    ----------------------------------------------------------------------
33    Name: Matthias Blume
34    Date: 2000/06/18 22:00:10 JST
35    Tag: blume-20000618-implicit-anchors-really-gone
36    Description:
37    
38    I updates the previous HISTORY entry where I forgot to mention that
39    implicit anchors are no longer with us.
40    
41    The current update also gets rid of the (now useless) controller
42    CM.Control.implicit_anchors.
43    
44    ----------------------------------------------------------------------
45    Name: Matthias Blume
46    Date: 2000/06/16 17:30:00 JST
47    Tag: blume-20000616-anchorenv
48    Description:
49    
50    This patch implements the long anticipated (just kidding :) "anchor
51    environment" mechanism.  In the course of doing this, I also
52    re-implemented CM's internal "SrcPath" module from scratch.  The new
53    one should be more robust in certain boundary cases.  In any case, it
54    is a lot cleaner than its predecessor (IMHO).
55    
56    This time, although there is yet another boot file format change, I
57    kept the unpickler backward-compatible.  As a result, no new bootfiles
58    are necessary and bootstrapping is straightforward.  (You cannot read
59    new bootfiles into an old system, but the other way around is no
60    problem.)
61    
62    Visible changes:
63    
64    ** 0. Implicit path anchors (without the leading $-symbol) are no
65    longer recognized at all. This means that such path names are not
66    illegal either.  For example, the name basis.cm simply refers to a
67    local file called "basis.cm" (i.e, the name is an ordinary path
68    relative to .cm-files directory).  Or, to put it differently, only
69    names that start with $ are anchored paths.
70    
71    ** 1. The $<singlearc> abbreviation for $/<singlearc> has finally
72    vanished.
73    
74    John (Reppy) had critizised this as soon as I originally proposed and
75    implemented it, but at that time I did not really deeply believe
76    him. :) Now I came full-circle because I need the $<singlearc> syntax
77    in another place where it cannot be seen as an abbreviation for
78    $/<singlearc>.  To avoid the confusion, $<singlearc> now means what it
79    seems to mean (i.e., it "expands" into the corresponding anchor
80    value).
81    
82    However, when paths are used as members in CM description files, it
83    continues to be true that there must be at least another arc after the
84    anchor.  This is now enforced separately during semantic analysis
85    (i.e., from a lexical/syntactical point of view, the notation is ok.)
86    
87    ** 2. The "cm" class now accepts an option "bind".  The option's value
88    is a sub-option list of precisely two items -- one labeled "anchor"
89    and the other one labeled "value".  As you might expect, "anchor" is
90    used to specify an anchor name to be bound, and "value" specifies what
91    the anchor is being bound to.
92    
93    The value must be a directory name and can be given in either standard
94    syntax (including the possibility that it is itself an anchored path)
95    or native syntax.
96    
97    Examples:
98    
99       foo.cm (bind:(anchor:bar value:$mystuff/bar))
100       lib.cm (bind:(anchor:a value:"H:\\x\\y\\z"))  (* only works under windows *)
101    
102    and so on.
103    
104    The meaning of this is that the .cm-file will be processed with an
105    augmented anchor environment where the given anchor(s) is/are bound to
106    the given values(s).
107    
108    The rationale for having this feature is this: Suppose you are trying
109    to use two different (already stable) libraries a.cm and b.cm (that
110    you perhaps didn't write yourself).  Further, suppose each of these
111    two libraries internally uses its own auxiliary library $aux/lib.cm.
112    Normally you would now have a problem because the anchor "lib" can not
113    be bound to more than one value globally.  Therefore, the project that
114    uses both a.cm and b.cm must locally redirect the anchor to some other
115    place:
116    
117       a.cm (bind:(anchor:lib value:/usr/lib/smlnj/a-stuff))
118       b.cm (bind:(anchor:lib value:/usr/lib/smlnj/b-stuff))
119    
120    This hard-wires $lib/aux.cm to /usr/lib/smlnj/a-stuff/aux.cm or
121    /usr/lib/smlnj/b-stuff/aux.cm, respectively.
122    
123    Hard-wiring path names is a bit inflexible (and CM will verbosely warn
124    you when you do so at the time of CM.stabilize).  Therefore, you can
125    also use an anchored path as the value:
126    
127      a.cm (bind:(anchor:lib value:$a-lib))
128      b.cm (bind:(anchor:lib value:$b-lib))
129    
130    Now you can globally configure (using the usual CM.Anchor.anchor or
131    pathconfig machinery) bindings for "a-lib" and "b-lib".  Since "lib"
132    itself is always locally bound, setting it globally is no longer
133    meaningful or necessary (but it does not hurt either).  In fact, "lib"
134    can still be used as a global anchor for separate purposes.  As a
135    matter of fact, one can locally define "lib" in terms of a global
136    "lib":
137    
138      a.cm (bind:(anchor:lib value:$lib/a))
139      b.cm (bind:(anchor:lib value:$lib/b))
140    
141    ** 3: The encoding of path names has changed.  This affects the way
142    path names are shown in CM's progress report and also the internal
143    protocol encoding used for parallel make.
144    
145    The encoding now uses one or more ':'-separated segments.  Each
146    segments corresponds to a file that has been specified relative to the
147    file given by its preceding segment.  The first segment is either
148    relative to the CWD, absolute, or anchored.  Each segment itself is
149    basically a Unix pathname; all segments but the first are relative.
150    
151    Example:
152    
153       $foo/bar/baz.cm:a/b/c.sml
154    
155    This path denotes the file bar/a/b/c.sml relative to the directory
156    denoted by anchor "foo".  Notice that the encoding also includes
157    baz.cm which is the .cm-file that listed a/b/c.sml.  As usual, such
158    paths are resolved relative to the .cm-files directory, so baz.cm must
159    be ignored to get the "real" pathname.
160    
161    To make this fact more obvious, CM puts the names of such "virtual
162    arcs" into parentheses when they appear in progress reports. (No
163    parentheses will appear in the internal protocol encoding.)  Thus,
164    what you really see is:
165    
166      $foo/bar/(baz.cm):a/b/c.sml
167    
168    I find this notation to be much more informative than before.
169    
170    Another new feature of the encoding is that special characters
171    including parentheses, colons, (back)slashes, and white space are
172    written as \ddd (where ddd is the decimal encoding of the character).
173    
174    *** The CM manual still needs to be updated.
175    
176    ----------------------------------------------------------------------
177    Name: Allen Leung
178    Date: 2000/06/15 00:38:00
179    Tag: leunga-20000615-x86-peephole
180    
181    x86 Peephole fix by Fermin.  Affects c-- and moby only.
182    
183    ----------------------------------------------------------------------
184    Name: Matthias Blume
185    Date: 2000/06/12 11:40:00
186    Tag: blume-20000612-parmakefix
187    Description:
188    
189    More cleanup after changing the file naming scheme: This time I
190    repaired the parallel make mechanism for CMB.make which I broke earlier.
191    
192    ----------------------------------------------------------------------
193    Name: Allen Leung
194    Date: 2000/06/09 01:25:00
195    Tag: leunga-20000609-various
196    
197    None of these things should affect normal SML/NJ operations
198    
199    1. Peephole improvements provided by Fermin (c--)
200    2. New annotation DEFUSE for adding extra dependence (moby)
201    3. New X86 LOCK instructions (moby)
202    4. New machine description language for reservation tables (scheduling)
203    5. Fixes to various optimization/analysis modules (branch chaining, dominator
204       trees etc.)
205    6. I've changed the CM files so that they can work with versions
206       110.0.6, 110.25 and 110.28
207    
208    ----------------------------------------------------------------------
209    Name: Matthias Blume
210    Date: 2000/06/09 12:40:00
211    Tag: blume-20000609-log
212    Description:
213    
214    - Removed all(?) remaining RCS Log entries from sources.
215    
216    - Fixed bug in ml-yacc and ml-lex sources (use explicit anchors for
217      anchored paths).
218    
219    ----------------------------------------------------------------------
220    Name: Matthias Blume
221    Date: 2000/06/07 17:00:00 JST
222    Tag: blume-20000607-no-implicit-anchors
223    Description:
224    
225    1. This update changes the default setting for
226    CM.Control.implicit_anchors from true to false.  This means that
227    implicit anchors are no longer permitted by default.  I also tried to
228    make sure that nothing else still relies on implicit anchors.
229    (This is the next step on the schedule towards a CM that does not even
230    have the notion of implicit anchors anymore.)
231    
232    2. More CM manual updates.
233    
234    3. I managed to track down and fix the pickling bug I mentioned last
235    time.  Because of the previously existing workaround, this entails no
236    immediate practical changes.
237    
238    ----------------------------------------------------------------------
239    Name: Matthias Blume
240    Date: 2000/06/06 11:15:00 JST
241    Tag: blume-20000606-lazierpickle
242    Description:
243    
244    !!!! NEW BOOT FILES !!!!
245    
246    * The main purpose of this update is to make library pickles lazier in
247    order to reduce the initial space penalty for autoloading a library.
248    As a result, it is now possible to have $smlnj/compiler.cm
249    pre-registered.  This should take care of the many complaints or
250    inquiries about missing structure Compiler.  This required changes to
251    CM's internal data structures and small tweaks to some algorithms.
252    
253    As a neat additional effect, it is no longer necessary (for the sake
254    of lean heap image files) to distinguish between a "minimal" CM and a
255    "full" CM.  Now, there is only one CM (i.e., the "full" version:
256    $smlnj/cm.cm aka $smlnj/cm/full.cm), and it is always available at the
257    interactive top level. ($smlnj/cm/minimal.cm is gone.)
258    
259    To make the life of compiler-hackers easier, "makeml" now also
260    pre-registers $smlnj/cmb.cm (aka $smlnj/cmb/current.cm).  In other
261    words, after you bootstrap a new sml for the first time, you will not
262    have to autoload $smlnj/cmb.cm again afterwards.  (The first time
263    around you will still have to do it, though.)
264    
265    * A second change consists of major updates to the CM manual.  There
266    are now several appendices with summary information and also a full
267    specification of the CM description file syntax.
268    
269    * In directory src/system I added the script "allcross".  This script
270    invokes sml and cross-compiles the compiler for all supported
271    architectures.  (Useful when providing a new set of boot files.)
272    
273    * There seems to be a latent bug in my "lazy pickles" mechanism.  I
274    added a small tweak to pickle-util.sml to work around this problem,
275    but it is not a proper fix yet.  I will investigate further.  (The
276    effect of the bug was an inflation of library pickle size.)
277    
278    * Version number increased to 110.28.1 (to avoid compatibility problems).
279    
280    ----------------------------------------------------------------------
281    Name: Allen Leung
282    Date: 2000/05/25 17:28 EDT
283    Tag: leunga-20000525-ra
284    Description:
285    
286      Fixed a bug in freezing phase of the register allocator.
287    
288    ----------------------------------------------------------------------
289    Name: Allen Leung
290    Date: 2000/05/15 22:53 EDT
291    Tag: leunga-20000515-alpha-x86-ra
292    Description:
293    
294      1. Alpha
295    
296          Slight cleanup.  Removed the instruction SGNXL
297    
298      2. X86
299    
300          Added the following instructions to the instruction set:
301    
302            ROLx, RORx,
303            BTx, BTSx, BTLx, BTRx,
304            XCHGx, and variants with the LOCK prefix
305    
306      3. Register Allocation
307    
308          The module ra-rewrite-with-renaming has been improved.
309    
310      These have no effect on SML/NJ.
311    
312    ----------------------------------------------------------------------
313    Name: Matthias Blume
314    Date: 2000/05/15 16:20:00 JST
315    Tag: blume-20000515-lightrebuild
316    Description:
317    
318    1. I added an alternative to "-rebuild" to "makeml".  The difference is
319       that prior to calling CMB.make' the CM-variable "LIGHT" will be
320       defined.  In effect, the command will not build any cross-compiler
321       backends and therefore finish more quickly.
322    
323       The "fixpt" script also takes a "-light" switch to be able to use
324       this new facility while compiling for a fixpoint.
325    
326    2. I replaced all mentions of anchored paths in group owner specifications
327       with simple relative paths (usually starting with "..").
328       The rationale is that a library's internal workings should not be
329       compromised by the lack of some anchor.  (An anchor is necessary
330       for someone who wants to refer to the library by an anchored path,
331       but it should not be necessary to build the same library in the first
332       place.)
333    
334    3. I changed the way CM's tool mechanism determines the shell command
335       string used for things like ml-yacc etc. so that it does not break
336       when CM.Control.implicit_anchors is turned off.
337    
338    ----------------------------------------------------------------------
339    Name: Matthias Blume
340    Date: 2000/05/12 18:20:00 JST
341    Tag: blume-20000512-ml-build
342    Description:
343    
344    Fixed a bug in config/_ml-build that prevented ml-yacc and ml-lex from
345    getting installed properly (by config/install.sh).
346    
347    ----------------------------------------------------------------------
348    Name: Matthias Blume
349    Date: 2000/05/12 17:30:00 JST
350    Tag: blume-20000512-anchors
351    Description:
352    
353    !!! NEW BOOT FILES !!!
354    
355    This change is in preparation of fading out support for "implicitly
356    anchored path names".  I went through all sources and used the
357    explicit (and relatively new) $-notation.  See system/README and the
358    CM manual for more info on this.
359    
360    I also modified the anchoring scheme for some things such as "smlnj",
361    "MLRISC", "cm", etc. to take advantage of the fact that explicit
362    anchors are more expressive: anchor name and first arc do not have to
363    coincide.  This entails the following user-visible change:
364    
365    You have to write $smlnj/foo/bar instead of smlnj/foo/bar.  In
366    particular, when you fire up sml with a command-line argument, say,
367    e.g.:
368    
369       sml '$smlnj/cmb.cm'
370    
371    At the ML toplevel prompt:
372    
373       CM.autoload "$smlnj/cmb.cm";
374    
375    There is also a new controller in CM.Control that can be used to turn
376    off all remaining support for implicit anchors by saying:
377    
378        CM.autoload "$smlnj/
379        #set CM.Control.implicit_anchors false;
380    
381    This causes CM to reject implicitly anchored paths.  This is (for the
382    time being) less permissive than the "final" version where there will
383    be no more such implicit anchors and relative paths will be just that:
384    relative.
385    
386    The next step (version after next version?) will be to make the
387    default for CM.Control.implicit_anchors false.  After the dust has
388    settled, I can then produce the "final" version of this...
389    
390    Note: Since bootstrapping is a bit tricky, I provided new boot files.
391    
392    ----------------------------------------------------------------------
393    Name: Matthias Blume
394    Date: 2000/05/11 16:30:00 JST
395    Tag: blume-20000511-sources
396    Description:
397    
398    The main change is that I added function CM.sources as a generalized
399    version of the earlier CM.makedepend.  This entails the following
400    additional changes:
401    
402      - CM.makedepend has been dropped.
403    
404      - CM manual has been updated.
405    
406      - TOOLS signature and API have been changed.
407    
408    ----------------------------------------------------------------------
409    Name: Allen Leung
410    Date: 2000/05/10 21:17 EDT
411    Tag: leunga-20000510-moby-c--ssa
412    Description:
413    
414      Various bug fixes and new features for C--, Moby and MLRISC optimizations.
415    None of these affect SML/NJ.
416    
417    1. Register Allocation
418    
419        a. A new ra spilling module (ra/ra-spill-with-renaming) is implemented.
420           This module tries to remove local (i.e. basic block level) redundancies
421           during spilling.
422    
423        b. A new framework for performing region based register allocation.
424           Not yet entirely functional.
425    
426    2. X86
427    
428       a. DefUse for POP was missing the stack pointer [found by Lal]
429       b. Reload for CALL was incorrect in X86Spill [found by John]
430       c. Various fixes in X86Spill so that it can be used correctly for
431          the new spilling module.
432    
433    3. SSA/IR
434    
435       a. New module ir/dj-dataflow.sml implements elimination based
436          data flow analysis.
437    
438    4. MLRiscGen
439    
440       a. Fix for gc type annotation
441    
442    5. MDGen
443    
444       Various fixes for machine description -> ml code translation.  For ssa
445       only.
446    
447    ----------------------------------------------------------------------
448    Name: Allen Leung
449    Date: 2000/05/08 22:17 EDT
450    Tag: leunga-20000508-labexp
451    Description:
452    
453      Fermin has found a few assembly problems with constant expressions
454      generated in LabelExp.  Mostly, the problems involve extra parentheses,
455      which choke on dumb assemblers.  This is his fix.
456    
457    ----------------------------------------------------------------------
458    Name: Dave MacQueen
459    Date: 2000/04/09 14:00 EDT
460    Tag: dbm-20000502-Version_110_28
461    Description:
462    
463    1. Updated src/compiler/TopLevel/main/version.sml to version 110.28
464    
465    2. Updated config/version to 110.28
466    
467    3. Updated config/srcarchiveurl
468    
469    3. New boot files!
470       ftp://ftp.research.bell-labs.com/dist/smlnj/working/110.28/
471    
472    ----------------------------------------------------------------------
473    Name: Matthias Blume
474    Date: 2000/05/01 19:05:00 JST
475    Tag: blume-20000501-noweb
476    Description:
477    
478    A new noweb tool has been added.  The existing system is entirely
479    unaffected by this, but some CM users have asked for renewed noweb
480    support.  Everything is documented in the CM manual.
481    
482    New (plugin) libraries:
483    
484       noweb-tool.cm
485       nw-ext.cm
486    
487    ----------------------------------------------------------------------
488    Name: Dave MacQueen
489    Date: 2000/04/30 12:40PM EDT
490    Tag: dbm-20000430-bug_fixes
491    Description:
492    
493    1. Fix for bug 1498
494       smlnj/src/system/Basis/Implementation/Unsafe/object.sig
495       smlnj/src/system/Basis/Implementation/Unsafe/object.sml
496         added toRealArray function
497       smlnj/src/compiler/MiscUtil/print/ppobj.sml
498         added check for tag Obj.RealArray to array printing case in ppObj
499    
500    2. Fix for bug 1510
501       smlnj/src/compiler/Semant/types/typesutil.sml
502         fixed definition of dummyargs (used by equalTycon) so that
503         dummy args are distinct types
504    
505    ----------------------------------------------------------------------
506    Name: Matthias Blume
507    Date: 2000/04/30 01:00:00 JST
508    Tag: blume-20000430-versions
509    Description:
510    
511    1. CM version numbering added.  This is an implementation of Lal's
512       proposal for adding version numbers and version checking to .cm
513       files.  Lal said that his proposal was just that -- a proposal.
514       For the time being I went ahead and implemented it so that people
515       can comment on it.  Everything is completely backward-compatible
516       (except for the stable library format, i.e., new bootfiles!).
517    
518       As usual, see the CM manual for details.
519    
520    2. An alternative syntax for anchored paths has been implemented.
521       Dave has recently voiced the same concerns that I had when I did
522       this, so there should be some support.  My take is that eventually
523       I will let support for the current syntax (where anchors are
524       "implicit") fade out in favor of the new, explicit syntax.
525       In order to be backward-compatible, both old and new syntax are
526       currently supported.
527    
528       Again, see the CM manual for details.
529    
530    3. Parallel make is trying to be slightly smarter:  When the master
531       process finds a "bottleneck", i.e., when there is only one
532       compilation unit that can be compiled and everybody else is
533       waiting on it, then it will simply compile it directly instead
534       of clumsily telling one of the slaves to do it.
535    
536    4. Support for "unsharing" added.  This is necessary in order to be
537       able to have two different versions of the same library running
538       at the same time (e.g., for trying out a new MLRISC while still
539       having the old MLRISC linked into the current compiler, etc.)
540       See the CM manual.
541    
542    5. Simple "makedepend" functionality added for generating Makefile
543       dependency information.  (This is rather crude at the moment.
544       Expect some changes here in the future.)
545    
546    6. ".fun" added as a recognized suffix for ML files. Also documented
547       explicitly in the manual that the fallback behavior (unknown suffix
548       -> ML file) is not an official feature!
549    
550    7. Small changes to the pickler for stable libraries.
551    
552    8. Several internal changes to CM (for cleanup/improvement).
553    
554    
555    !!!! NEW BINFILES !!!!
556    
557    ----------------------------------------------------------------------
558    Name: Matthias Blume
559    Date: 2000/04/28 17:30:00 JST
560    Tag: blume-20000428-pathconfig
561    Description:
562    
563    1. I changed config/install.sh to remove duplicate entries from the
564       lib/pathconfig file at the end.  Moreover, the final version of
565       lib/pathconfig is sorted alphabetically.  The same (sorting) is done
566       in src/system/installml.
567    
568    2. The config/install.sh script now consistently uses relative
569       pathnames in lib/pathconfig whenever the anchor is in the lib
570       directory.  (So far this was true for the libraries that come
571       pre-compiled and bundled as part of the bootfiles but not for
572       libraries that are compiled by the script itself.)
573    
574    ----------------------------------------------------------------------
575    Name: Matthias Blume
576    Date: 2000/04/26 13:10:00 JST
577    Tag: blume-20000426-fun_suffix
578    Description:
579    
580    Added ".fun" as a recognized file name suffix (for ML code).
581    
582    ----------------------------------------------------------------------
583    Name: Allen Leung
584    Date: 2000/04/25 17:00:00 EST
585    Tag: leunga-20000425-alpha-ra
586    Description:
587    
588    1. Alpha
589    
590        PSEUDOARITH was missing in AlphaRewrite.  This causes an endless loop
591    in C--.
592    
593    2. RA
594    
595       Added a flag "ra-dump-size" to print out the size of the flowgraph
596       and the interference graph.
597    
598    ----------------------------------------------------------------------
599    Name: Dave MacQueen
600    Date: 2000/04/25/
601    Tag: dbm-20000425-mlyacc_doc_examples
602    Description:
603      Updated mlyacc.tex sections 5 and 7 for SML '97 and CM.
604      Updated all three examples in src/ml-yacc/examples to run
605      under 110.* using CM.make.
606    
607    ----------------------------------------------------------------------
608    Name: Allen Leung
609    Date: 2000/04/20 23:04:00 EST
610    Tag: leunga-20000420-ssa-c---stuff
611    Description:
612    
613      This update synchronizes my repository with Yale's.  Most of these
614    changes, however, do not affect SML/NJ at all (the RA is an exception).
615    
616    1. Register Allocator
617    
618       a. An improvement in the interference graph construction:
619          Given a copy
620    
621                s <- t
622    
623          no interference edge between s and t is added for this definition of s.
624    
625       b. I've added two new spill heuristic modules that Fermin and I developed
626          (in the new library RA.cm). These are unused in SML/NJ but maybe
627          useful for others (Moby?)
628    
629    2. X86
630    
631       a. Various fixes in the backend provided by Fermin [C--] and Lal.
632    
633    3. Alpha
634    
635       a. Added the BSR instruction and code generation that goes with it [C--]
636       b. Other fixes too numerous to recount provided by Fermin [C--]
637    
638    4. Regmaps
639    
640       a. The regmaps are not initialized with the identity physical bindings
641          at creation time.  This is unneeded.
642    
643    5. MLRISC Optimizations
644    
645       a. The DJ-Graph module can now compute the iterated dominance frontiers
646          intersects with liveness incrementally in linear time! Woohoo!
647          This is now used in my new SSA construction algorithm.
648    
649       b. THe branch reorganization module is now smarter about linear chains of
650          basic blocks.
651    
652    
653    ----------------------------------------------------------------------
654    Name: Matthias Blume
655    Date: 2000/04/12 13:52:00 JST
656    Tag: blume_main_v110p27_1
657    Description:
658    
659    Changed install.sh script to handle archive files without version number
660    and to use "boot.<arch>-<os>" instead of "sml.boot.<arch>-<os>" for the
661    name of the boot file archive.
662    
663    ----------------------------------------------------------------------
664    Name: Dave MacQueen
665    Date: 2000/04/09 14:00 EDT
666    Tag: dbm-20000410-Version_110_27
667    Description:
668    
669    1. Updated src/compiler/TopLevel/main/version.sml to version 110.27
670    
671    2. Updated src/config/version to 110.27
672    
673    3. New boot files!
674    
675    ----------------------------------------------------------------------
676    Name: Allen Leung
677    Date: 2000/04/09 19:09:00 EST
678    Tag: leunga-20000409-misc
679    Description:
680    
681    1.  Yet another fix for x86 assembly for idivl, imull, mull and friends.
682    
683    2.  Miscellaneous improvements to MLRISC (unused in sml/nj)
684    
685    ----------------------------------------------------------------------
686    Name: Stefan
687    Date: 2000/04/07 10:00:00 EDT
688    Tag: monnier-20000406-branch-handling
689    Description:
690    
691    Improved handling of branches (mostly those generated from
692    polymorphic equality), removed switchoff and changed the
693    default optimization settings (more cpsopt and less flintopt).
694    
695    ----------------------------------------------------------------------
696    Name: Allen Leung
697    Date: 2000/04/06 01:30:00 EST
698    Tag: leunga-20000406-peephole-x86-SSA-2
699    Description:
700    
701       Forgot a few files.
702    
703    ----------------------------------------------------------------------
704    Name: Allen Leung
705    Date: 2000/04/06 00:36:00 EST
706    Tag: leunga-20000406-peephole-x86-SSA
707    Description:
708    
709    1.  New Peephole code
710    
711    2.  Minor improvement to X86 instruction selection
712    
713    3.  Various fixes to SSA and machine description -> code translator
714    
715    ----------------------------------------------------------------------
716    Name: Matthias Blume
717    Date: 2000/04/05 12:30:00 JST
718    Tag: blume_main_v110p26p2_3
719    Description:
720    
721    This update just merges three minor cosmetic updates to CM's sources
722    to get ready for the 110.27 code freeze on Friday.  No functionality
723    has changed.
724    
725    ----------------------------------------------------------------------
726    Name: Allen Leung
727    Date: 2000/04/04 19:39:00 EST
728    Tag: leunga-20000404-x86-asm
729    Description:
730    
731    1.  Fixed a problem in X86 assembly.
732    
733        Things like
734    
735           jmp %eax
736           jmp (%eax)
737    
738        should be output as
739    
740           jmp *%eax
741           jmp *(%eax)
742    
743    2.  Assembly output
744    
745          Added a new flag
746    
747              "asm-indent-copies" (default to false)
748    
749          When this flag is on, parallel copies will be indented an extra level.
750    
751    ----------------------------------------------------------------------
752    Name: Allen Leung
753    Date: 2000/04/04 03:18:00 EST
754    Tag: leunga-20000404-C--Moby
755    Description:
756    
757        All of these fixes are related to C--, Moby, and my own optimization
758        stuff; so they shouldn't affect SML/NJ.
759    
760    1.  X86
761    
762        Various fixes related floating point, and extensions.
763    
764    2.  Alpha
765    
766        Some extra patterns related to loads with signed/zero extension
767        provided by Fermin.
768    
769    3.  Assembly
770    
771        When generating assembly, resolve the value of client defined constants,
772        instead of generating symbolic values.  This is controlled by the
773        new flag "asm-resolve-constants", which is default to true.
774    
775    4.  Machine Descriptions
776    
777        a. The precedence parser was slightly broken when parsing infixr symbols.
778        b. The type generalizing code had the bound variables reversed, resulting
779           in a problem during arity raising.
780        c. Various fixes in machine descriptions.
781    
782    ----------------------------------------------------------------------
783    Name: Matthias Blume
784    Date: 2000/04/03 16:05:00 JST
785    Tag: blume_main_v110p26p2_2
786    Description:
787    
788    I eliminated coreEnv from compInfo.  Access to the "Core" structure is
789    now done via the ordinary static environment that is context to each
790    compilation unit.
791    
792    To this end, I arranged that instead of "structure Core" as "structure
793    _Core" is bound in the pervasive environment.  Core access is done via
794    _Core (which can never be accidentally rebound because _Core is not a
795    legal surface-syntax symbol).
796    
797    The current solution is much cleaner because the core environment is
798    now simply part of the pervasive environment which is part of every
799    compilation unit's context anyway.  In particular, this eliminates all
800    special-case handling that was necessary until now in order to deal
801    with dynamic and symbolic parts of the core environment.
802    
803    Remaining hackery (to bind the "magic" symbol _Core) is localized in the
804    compilation manager's bootstrap compiler (actually: in the "init group"
805    handling).  See the comments in src/system/smlnj/init/init.cmi for
806    more details.
807    
808    I also tried to track down all mentions of "Core" (as string argument
809    to Symbol.strSymbol) in the compiler and replaced them with a
810    reference to the new CoreSym.coreSym.  Seems cleaner since the actual
811    name appears in one place only.
812    
813    Binfile and bootfile format have not changed, but the switchover from
814    the old "init.cmi" to the new one is a bit tricky, so I supplied new
815    bootfiles anyway.
816    
817    ----------------------------------------------------------------------
818    Name: Allen Leung
819    Date: 2000/04/02 21:17:00 EST
820    Tag: leunga-20000402-mltree
821    Description:
822    
823       1. Renamed the constructor CALL in MLTREE by popular demand.
824       2. Added a bunch of files from my repository.  These are currently
825          used by other non-SMLNJ backends.
826    
827    ----------------------------------------------------------------------
828    Name: Allen Leung
829    Date: 2000/03/31 21:15:00 EST
830    Tag: leunga-20000331-aliasing
831    Description:
832    
833    This update contains a rewritten (and hopefully more correct) module
834    for extracting aliasing information from CPS.
835    
836       To turn on this feature:
837    
838            Compiler.Control.CG.memDisambiguate := true
839    
840       To pretty print the region information with assembly
841    
842           Compiler.Control.MLRISC.getFlag "asm-show-region" := true;
843    
844       To control how many levels of aliasing information are printed, use:
845    
846           Compiler.Control.MLRISC.getInt "points-to-show-level" := n
847    
848       The default of n is 3.
849    
850    ----------------------------------------------------------------------
851    Name: David MacQueen
852    Date: 2000/03/31 11:15:00 EST
853    Tag: dbm-20000331-runtime_fix
854    Description:
855    
856    This update contains:
857    
858    1. runtime/c-lib/c-libraries.c
859       includes added in revision 1.2 caused compilation errors on hppa-hpux
860    
861    2. fix for bug 1556
862       system/Basis/Implementation/NJ/internal-signals.sml
863    
864    ----------------------------------------------------------------------
865    Name: Matthias Blume
866    Date: 2000/03/31 18:00:00 JST
867    Tag: blume_main_v110p26p2_1
868    Description:
869    
870    This update contains:
871    
872    1. A small change to CM's handling of stable libraries:
873       CM now maintains one "global" modmap that is used for all stable
874       libraries.  The use of such a global modmap maximizes sharing and
875       minimizes the need for re-traversing parts of environments during
876       modmap construction.  (However, this has minor impact since modmap
877       construction seems to account for just one percent or less of total
878       compile time.)
879    
880    2. I added a "genmap" phase to the statistics.  This is where I got the
881       "one percent" number (see above).
882    
883    3. CM's new tool parameter mechanism just became _even_ better. :)
884       - The parser understands named parameters and recursive options.
885       - The "make" and "shell" tools use these new features.
886         (This makes it a lot easier to cascade these tools.)
887       - There is a small syntax change: named parameters use a
888    
889           <name> : ( <option> ... )            or
890           <name> : <string>
891    
892         syntax.  Previously, named parameters were implemented in an
893         ad-hoc fashion by each tool individually (by parsing strings)
894         and had the form
895    
896           <name>=<string>
897    
898       See the CM manual for a full description of these issues.
899    
900    ----------------------------------------------------------------------
901    Name: Matthias Blume
902    Date: 2000/03/30 18:00:00 JST
903    Tag: blume_main_v110p26p2_0
904    Description:
905    
906    !!!!! WARNING !!!!!!
907    !!  New binfiles  !!
908    !!!!!!!!!!!!!!!!!!!!
909    
910    This update contains:
911    
912    1. Moderate changes to CM:
913    
914       - Changes to CM's tools mechanism.  In particular, it is now possible
915       to have tools that accept additional "command line" parameters
916       (specified in the .cm file at each instance where the tool's class is
917       used).
918    
919       This was done to accommodate the new "make" and "shell" tools which
920       facilitate fairly seamless hookup to portions of code managed using
921       Makefiles or Shell scripts.
922    
923       There are no classes "shared" or "private" anymore.  Instead, the
924       sharing annotation is now a parameter to the "sml" class.
925    
926       There is a bit of generic machinery for implementing one's own
927       tools that accept command-line parameters.  However, I am not yet fully
928       satisfied with that part, so expect changes here in the future.
929    
930       All existing tools are described in the CM manual.
931    
932       - Slightly better error handling.  (CM now suppresses many followup
933       error messages that tended to be more annoying than helpful.)
934    
935    2. Major changes to the compiler's static environment data structures.
936    
937       - no CMStaticEnv anymore.
938            - no CMEnv, no "BareEnvironment" (actually, _only_ BareEnvironment,
939              but it is called Environment), no conversions between different
940              kinds of static environments
941    
942       - There is still a notion of a "modmap", but such modmaps are generated
943         on demand at the time when they are needed.  This sounds slow, but I
944         sped up the code that generates modmaps enough for this not to lead to
945         a slowdown of the compiler (at least I didn't detect any).
946    
947       - To facilitate rapid modmap generation, static environments now
948         contain an (optional) "modtree" structure.  Modtree annotations are
949         constructed by the unpickler during unpickling.  (This means that
950         the elaborator does not have to worry about modtrees at all.)
951         Modtrees have the advantage that they are compositional in the same
952         way as the environment data structure itself is compositional.
953         As a result, modtrees never hang on to parts of an environment that
954         has already been rendered "stale" by filtering or rebinding.
955    
956       - I went through many, many trials and errors before arriving at the
957         current solution.  (The initial idea of "linkpaths" did not work.)
958         But the result of all this is that I have touched a lot of files that
959         depend on the "modules" and "types" data structures (most of the
960         elaborator). There were a lot of changes during my "linkpath" trials
961         that could have been reverted to their original state but weren't.
962         Please, don't be too harsh on me for messing with this code a bit more
963         than what was strictly necessary...  (I _did_ resist the tempation
964         of doing any "global reformatting" to avoid an untimely death at
965         Dave's hands. :)
966    
967       - One positive aspect of the previous point:  At least I made sure that
968         all files that I touched now compile without warnings (other than
969         "polyEqual").
970    
971       - compiler now tends to run "leaner" (i.e., ties up less memory in
972         redundant modmaps)
973    
974    ----------------------------------------------------------------------
975    Name: Allen Leung
976    Date: 2000/03/29 18:00:00
977    Tag: leunga-20000327-mlriscGen_hppa_alpha_x86
978    Boot files (optional): ftp://react-ilp.cs.nyu.edu/leunga/110.26.1-sml.boot.x86-unix-20000330.tar.gz
979    Description:
980    
981       This update contains *MAJOR* changes to the way code is generated from CPS
982    in the module mlriscGen, and in various backend modules.
983    
984    CHANGES
985    =======
986    
987    1. MLRiscGen: forward propagation fix.
988    
989       There was a bug in forward propagation introduced at about the same time
990       as the MLRISC x86 backend, which prohibits coalescing to be
991       performed effectively in loops.
992    
993       Effect: speed up of loops in RISC architectures.
994               By itself, this actually slowed down certain benchmarks on the x86.
995    
996    2. MLRiscGen:  forward propagating addresses from consing.
997    
998       I've changed the way consing code is generated.  Basically I separated
999       out the initialization part:
1000    
1001            store tag,   offset(allocptr)
1002            store elem1, offset+4(allocptr)
1003            store elem2, offset+8(allocptr)
1004            ...
1005            store elemn, offset+4n(allocptr)
1006    
1007       and the address computation part:
1008    
1009            celladdr <- offset+4+alloctpr
1010    
1011       and move the address computation part
1012    
1013       Effect:  register pressure is generally lower as a result.  This
1014                makes compilation of certain expressions much faster, such as
1015                long lists with non-trivial elements.
1016    
1017                 [(0,0), (0,0), .... (0,0)]
1018    
1019    3. MLRiscGen: base pointer elimination.
1020    
1021        As part of the linkage mechanism, we generate the sequence:
1022    
1023         L:  ...  <- start of the code fragment
1024    
1025         L1:
1026             base pointer <- linkreg - L1 + L
1027    
1028         The base pointer was then used for computing relocatable addresses
1029       in the code fragment.  Frequently (such as in lots of continuations)
1030       this is not needed.  We now eliminate this sequence whenever possible.
1031    
1032         For compile time efficiency, I'm using a very stupid local heuristic.
1033       But in general, this should be done as a control flow analysis.
1034    
1035       Effect:  Smaller code size.  Speed up of most programs.
1036    
1037    4. Hppa back end
1038    
1039         Long jumps in span dependence resolution used to depend on the existence
1040      of the base pointer.
1041    
1042         A jump to a long label L was expanded into the following sequence:
1043    
1044          LDIL %hi(L-8192), %r29
1045          LDO  %lo(L-8192)(%r29), %r29
1046          ADD  %r29, baseptr, %r29
1047          BV,n %r0(%r29)
1048    
1049         In the presence of change (3) above, this will not work.  I've changed
1050       it so that the following sequence of instructions are generated, which
1051       doesn't mention the base pointer at all:
1052    
1053             BL,n  L', %r29           /* branch and link, L' + 4 -> %r29 */
1054        L':  ADDIL L-(L'+4), %r29     /* Compute address of L */
1055             BV,n  %r0(%r29)          /* Jump */
1056    
1057    5. Alpha back end
1058    
1059          New alpha instructions LDB/LDW have been added, as per Fermin's
1060       suggestions.   This is unrelated to all other changes.
1061    
1062    6. X86 back end
1063    
1064         I've changed andl to testl in the floating point test sequence
1065         whenever appropriate.  The Intel optimization guide states that
1066         testl is preferable to andl.
1067    
1068    7. RA (x86 only)
1069    
1070         I've improved the spill propagation algorithm, using an approximation
1071       of maximal weighted independent sets.   This seems to be necessary to
1072       alleviate the negative effect in light of the slow down in (1).
1073    
1074         I'll write down the algorithm one of these days.
1075    
1076    8. MLRiscGen: frequencies
1077    
1078         I've added an annotation that states that all call gc blocks have zero
1079       execution frequencies.  This improves register allocation on the x86.
1080    
1081    BENCHMARKS
1082    ==========
1083    
1084       I've only perform the comparison on 110.25.
1085    
1086       The platforms are:
1087    
1088        HPPA  A four processor HP machine (E9000) with 5G of memory.
1089        X86   A 300Hhz Pentium II with 128M of memory, and
1090        SPARC An Ultra sparc 2 with 512M of memory.
1091    
1092       I used the following parameters for the SML benchmarks:
1093    
1094                 @SMLalloc
1095         HPPA    256k
1096         SPARC   512k
1097         X86     256k
1098    
1099    COMPILATION TIME
1100    ----------------
1101       Here are the numbers comparing the compilation times of the compilers.
1102       I've only compared 110.25 compiling the new sources versus
1103       a fixpoint version of the new compiler compiling the same.
1104    
1105                     110.25                                  New
1106               Total  Time in RA  Spill+Reload   Total  Time In RA Spill+Reload
1107         HPPA   627s    116s        2684+3584     599s    95s       1003+1879
1108         SPARC  892s    173s        2891+3870     708s    116s      1004+1880
1109         X86    999s    315s       94006+130691   987s    296s    108877+141957
1110    
1111                   110.25         New
1112                Code Size      Code Size
1113         HPPA   8596736         8561421
1114         SPARC  8974299         8785143
1115         X86    9029180         8716783
1116    
1117       So in summary, things are at least as good as before.   Dramatic
1118       reduction in compilation is obtained on the Sparc; I can't explain it,
1119       but it is reproducible.  Perhaps someone should try to reproduce this
1120       on their own machines.
1121    
1122    SML BENCHMARKS
1123    --------------
1124    
1125        On the average, all benchmarks perform at least as well as before.
1126    
1127          HPPA         Compilation Time     Spill+Reload      Run Time
1128                     110.25  New            110.25    New   110.25  New
1129    
1130          barnesHut  3.158  3.015  4.75%    1+1       0+0   2.980  2.922   2.00%
1131              boyer  6.152  5.708  7.77%    0+0       0+0   0.218  0.213   2.34%
1132       count-graphs  1.168  1.120  4.32%    0+0       0+0  22.705 23.073  -1.60%
1133                fft  0.877  0.792 10.74%    1+3       1+3   0.602  0.587   2.56%
1134        knuthBendix  3.180  2.857 11.32%    0+0       0+0   0.675  0.662   2.02%
1135             lexgen  6.190  5.290 17.01%    0+0       0+0   0.913  0.788  15.86%
1136               life  0.803  0.703 14.22%   25+25      0+0   0.153  0.140   9.52%
1137              logic  2.048  2.007  2.08%    6+6       1+1   4.133  4.008   3.12%
1138         mandelbrot  0.077  0.080 -4.17%    0+0       0+0   0.765  0.712   7.49%
1139             mlyacc 22.932 20.937  9.53%  154+181    32+57  0.468  0.430   8.91%
1140            nucleic  5.183  5.060  2.44%    2+2       0+0   0.125  0.120   4.17%
1141      ratio-regions  3.357  3.142  6.84%    0+0       0+0  116.225 113.173 2.70%
1142                ray  1.283  1.290 -0.52%    0+0       0+0   2.887  2.855   1.11%
1143             simple  6.307  6.032  4.56%   28+30      5+7   3.705  3.658   1.28%
1144                tsp  0.888  0.862  3.09%    0+0       0+0   7.040  6.893   2.13%
1145               vliw 24.378 23.455  3.94%  106+127    25+45  2.758  2.707   1.91%
1146      --------------------------------------------------------------------------
1147       Average                     6.12%                                   4.09%
1148    
1149          SPARC        Compilation Time     Spill+Reload      Run Time
1150                     110.25  New            110.25    New   110.25  New
1151    
1152          barnesHut  3.778  3.592  5.20%    2+2       0+0   3.648  3.453    5.65%
1153              boyer  6.632  6.110  8.54%    0+0       0+0   0.258  0.242    6.90%
1154       count-graphs  1.435  1.325  8.30%    0+0       0+0  33.672 34.737   -3.07%
1155                fft  0.980  0.940  4.26%    3+9       2+6   0.838  0.827    1.41%
1156        knuthBendix  3.590  3.138 14.39%    0+0       0+0   0.962  0.967   -0.52%
1157             lexgen  6.593  6.072  8.59%    1+1       0+0   1.077  1.078   -0.15%
1158               life  0.972  0.868 11.90%   26+26      0+0   0.143  0.140    2.38%
1159              logic  2.525  2.387  5.80%    7+7       1+1   5.625  5.158    9.05%
1160         mandelbrot  0.090  0.093 -3.57%    0+0       0+0   0.855  0.728   17.39%
1161             mlyacc 26.732 23.827 12.19%  162+189    32+57  0.550  0.560   -1.79%
1162            nucleic  6.233  6.197  0.59%    3+3       0+0   0.163  0.173   -5.77%
1163      ratio-regions  3.780  3.507  7.79%    0+0       0+0 133.993 131.035   2.26%
1164                ray  1.595  1.550  2.90%    1+1       0+0   3.440  3.418    0.63%
1165             simple  6.972  6.487  7.48%   29+32      5+7   3.523  3.525   -0.05%
1166                tsp  1.115  1.063  4.86%    0+0       0+0   7.393  7.265    1.77%
1167               vliw 27.765 24.818 11.87%  110+135    25+45  2.265  2.135    6.09%
1168      ----------------------------------------------------------------------------
1169       Average                     6.94%                                    2.64%
1170    
1171          X86          Compilation Time     Spill+Reload      Run Time
1172                     110.25  New            110.25    New   110.25  New
1173    
1174          barnesHut  5.530  5.420  2.03%  593+893   597+915   3.532  3.440   2.66%
1175              boyer  8.768  7.747 13.19%  493+199   301+289   0.327  0.297  10.11%
1176       count-graphs  2.040  2.010  1.49%  298+394   315+457  26.578 28.660  -7.26%
1177                fft  1.327  1.302  1.92%  112+209   115+210   1.055  0.962   9.71%
1178        knuthBendix  5.218  5.475 -4.69%  451+598   510+650   0.928  0.932  -0.36%
1179             lexgen  9.970  9.623  3.60% 1014+841  1157+885   0.947  0.928   1.97%
1180               life  1.183  1.183  0.00%  162+182   145+148   0.127  0.103  22.58%
1181              logic  3.285  3.512 -6.45%  514+684   591+836   5.682  5.577   1.88%
1182         mandelbrot  0.147  0.143  2.33%   38+41     33+54    0.703  0.690   1.93%
1183             mlyacc 35.457 32.763  8.22% 3496+4564 3611+4860  0.552  0.550   0.30%
1184            nucleic  7.100  6.888  3.07%  239+168   201+158   0.175  0.173   0.96%
1185      ratio-regions  6.388  6.843 -6.65% 1182+257   981+300  120.142 120.345 -0.17%
1186                ray  2.332  2.338 -0.29%  346+398   402+494   3.593  3.540   1.51%
1187             simple  9.912  9.903  0.08% 1475+941  1579+1168  3.057  3.178  -3.83%
1188                tsp  1.623  1.532  5.98%  266+200   250+211   8.045  7.878   2.12%
1189               vliw 33.947 35.470 -4.29% 2629+2774 2877+3171  2.072  1.890   9.61%
1190      ----------------------------------------------------------------------------
1191       Average                     1.22%                                     3.36%
1192    
1193    ----------------------------------------------------------------------
1194    Name: Allen Leung
1195    Date: 2000/03/23 16:25:00
1196    Tag: leunga-20000323-fix_x86_alpha
1197    Description:
1198    
1199    1. X86 fixes/changes
1200    
1201       a.  The old code generated for SETcc was completely wrong.
1202           The Intel optimization guide is VERY misleading.
1203    
1204    2. ALPHA fixes/changes
1205    
1206       a.  Added the instructions LDBU, LDWU, STB, STW as per Fermin's suggestion.
1207       b.  Added a new mode byteWordLoadStores to the functor parameter to Alpha()
1208       c.  Added reassociation code for address computation.
1209    
1210    ----------------------------------------------------------------------
1211    Name: Allen Leung
1212    Date: 2000/03/22 01:23:00
1213    Tag: leunga-20000322-fix_x86_hppa_ra
1214    Description:
1215    
1216    1. X86 fixes/changes
1217    
1218       a.  x86Rewrite bug with MUL3 (found by Lal)
1219       b.  Added the instructions FSTS, FSTL
1220    
1221    2. PA-RISC fixes/changes
1222    
1223       a.  B label should not be a delay slot candidate!  Why did this work?
1224       b.  ADDT(32, REG(32, r), LI n) now generates one instruction instead of two,
1225           as it should be.
1226       c.  The assembly syntax for fstds and fstdd was wrong.
1227       d.  Added the composite instruction COMICLR/LDO, which is the immediate
1228           operand variant of COMCLR/LDO.
1229    
1230    3. Generic MLRISC
1231    
1232       a.  shuffle.sml rewritten to be slightly more efficient
1233       b.  DIV bug in mltree-simplify fixed (found by Fermin)
1234    
1235    4. Register Allocator
1236    
1237       a.  I now release the interference graph earlier during spilling.
1238           May improve memory usage.
1239    
1240    ----------------------------------------------------------------------
1241    Name: Matthias Blume
1242    Date: 2000/03/14 14:15:32
1243    Tag: blume_main_v110p26p1_2
1244    Description:
1245    
1246    1. Tools.registerStdShellCmdTool (from smlnj/cm/tool.cm) takes an
1247    additional argument called "template" which is an optional string that
1248    specifies the layout of the tool command line.  See the CM manual for
1249    explanation.
1250    
1251    2. A special-purpose tool can be "registered" by simply dropping the
1252    corresponding <...>-tool.cm (and/or <...>-ext.cm) into the same
1253    directory where the .cm file lives that uses this tool.  (The
1254    behavior/misfeature until now was to look for the tool description
1255    files in the current working directory.)  As before, tool description
1256    files could also be anchored -- in which case they can live anywhere
1257    they like.  Following the recent e-mail discussion, this change should
1258    make it easier to have special-purpose tools that are shipped together
1259    with the sources of the program that uses them.
1260    
1261    ----------------------------------------------------------------------
1262    Name: Matthias Blume
1263  Date: 2000/03/10 07:48:34  Date: 2000/03/10 07:48:34
1264  Tag: blume_main_v110p26p1_1  Tag: blume_main_v110p26p1_1
1265  Description:  Description:
# Line 45  Line 1292 
1292  rebuild.  Having sets of the form <base><k>.{bin,boot}.<arch>-unix for  rebuild.  Having sets of the form <base><k>.{bin,boot}.<arch>-unix for
1293  <k>=1,2,... is normally not a good idea when invoking fixpt.  However,  <k>=1,2,... is normally not a good idea when invoking fixpt.  However,
1294  they might be the result of an earlier partial run of fixpt (which  they might be the result of an earlier partial run of fixpt (which
1295  perhaps got accidentially killed).  In this case, fixpt will quickly  perhaps got accidentally killed).  In this case, fixpt will quickly
1296  move through what exists before continuing where it left off earlier,  move through what exists before continuing where it left off earlier,
1297  and, thus, saves a lot of time.  and, thus, saves a lot of time.
1298    
# Line 95  Line 1342 
1342    it from that remote directory.    it from that remote directory.
1343    This should simplify installation further:  For machines that have    This should simplify installation further:  For machines that have
1344    access to the internet, just fetch <version>-config.tgz, unpack it,    access to the internet, just fetch <version>-config.tgz, unpack it,
1345    edit config/targets, and go (run config/install.sh).  The scipt will    edit config/targets, and go (run config/install.sh).  The script will
1346    fetch everything else that it might need all by itself.    fetch everything else that it might need all by itself.
1347    
1348    For CVS users, this mechanism is not relevant for source archives, but    For CVS users, this mechanism is not relevant for source archives, but

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