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revision 1178, Mon Mar 25 20:51:48 2002 UTC revision 1288, Tue Oct 29 14:48:54 2002 UTC
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14    
15  ----------------------------------------------------------------------  ----------------------------------------------------------------------
16  Name: Matthias Blume  Name: Matthias Blume
17    Date: 2002/10/28 09:50:00 EST
18    Tag: blume-20021028-typecheck
19    Description:
20    
21    Exported structure Typecheck from $smlnj/viscomp/core.cm.
22    
23    ----------------------------------------------------------------------
24    Name: Matthias Blume
25    Date: 2002/10/17 09:10:00 EDT
26    Tag: Release_110_42
27    Description:
28    
29    In good old tradition, there has been a slight hiccup so that we have
30    to patch 110.42 after the fact.   The old release tag has been replaced
31    (see below).
32    
33    The change solves a problem with two competing approaches the
34    configuration problem regarding MacOS 10.1 vs. MacOS 10.2 which got in
35    each other's way.
36    
37    This change only affects the runtime system code and the installer script.
38    (No new bootfiles.)
39    
40    ----------------------------------------------------------------------
41    Name: Matthias Blume
42    Date: 2002/10/16 12:00:00 EDT
43    Tag: Release_110_42_removed
44    Description:
45    
46    New working release.  New bootfiles.
47    
48    ----------------------------------------------------------------------
49    Name: Matthias Blume
50    Date: 2002/10/10 13:10:00 EDT
51    Tag: blume-20021010-ppc-divs
52    Description:
53    
54    The mltree operator DIVS must be implemented with an overflow check on
55    the PPC because the hardware indicates divide-by-zero using "overflow" as
56    well.
57    
58    ----------------------------------------------------------------------
59    Name: Matthias Blume
60    Date: 2002/07/23 11:45:00
61    Tag: blume-20020723-smlnj-home
62    Description:
63    
64    Sml now senses the SMLNJ_HOME environment variable.  If this is set,
65    then the bin dir is assumed to be in $SMLNJ_HOME/bin and (unless
66    CM_PATHCONFIG is also set), the path configuration file is assumed
67    to be in $SMLNJ_HOME/lib/pathconfig.  This way one can easily move
68    the entire tree to some other place and everything will "just work".
69    
70    (Companion commands such as ml-build and ml-makedepend also sense this
71    variable.)
72    
73    ----------------------------------------------------------------------
74    Name: Matthias Blume
75    Date: 2002/07/12 21:19:00 EDT
76    Tag: blume-20020712-liveness
77    Description:
78    
79    Exported two useful "step" functions from liveness module (MLRISC).
80    
81    ----------------------------------------------------------------------
82    Name: Matthias Blume
83    Date: 2002/07/05 16:00 EDT
84    Tag: Release_110_41
85    Description:
86    
87    New working release.  New bootfiles.
88    
89    ----------------------------------------------------------------------
90    Name: Matthias Blume
91    Date: 2002/07/05 10:25:00 EDT
92    Tag: blume-20020705-btimp
93    Description:
94    
95    Exported structure BTImp from $smlnj/viscomp/debugprof.cm so that
96    other clients can set up backtracing support.
97    
98    ----------------------------------------------------------------------
99    Name: Matthias Blume
100    Date: 2002/06/25 17:23:00 EDT
101    Tag: blume-20020625-fpmax
102    Description:
103    
104    Fixed a bug in translation of INLMAX (and INLMIN) for the floating-point
105    case.  (The sense of the isNaN test was reversed -- which made min and
106    max always return their first argument.)
107    
108    ----------------------------------------------------------------------
109    Name: Matthias Blume
110    Date: 2002/06/11
111    Tag: blume-20020611-unixpath
112    Description:
113    
114    Back-ported OS.Path.{from,to}UnixPath from idlbasis-devel branch.
115    
116    ----------------------------------------------------------------------
117    Name: Matthias Blume
118    Date: 2002/06/10 16:35:00 EDT
119    Tag: blume-20020610-ieeereal
120    Description:
121    
122    I back-ported my implementation of IEEEReal.fromString from the
123    idlbasis-devel branch so that we can test it.
124    
125    Another small change is that ppDec tries to give more information
126    than just "<sig>" in the case of functors.  However, this code is
127    broken in some mysterious way if the functor's body's signature
128    has not been declared by ascription but gets inferred from the
129    implementation.  This needs fixing...
130    
131    ----------------------------------------------------------------------
132    Name: Matthias Blume
133    Date: 2002/05/31
134    Tag: blume-20020531-btrace-mode
135    Description:
136    
137    Resurrected SMLofNJ.Internals.BTrace.mode.  (It accidentally fell by
138    the wayside when I switched over to using Controls everywhere.)
139    
140    ----------------------------------------------------------------------
141    Name: Lal George
142    Date: 2002/05/23 12:21:40 EDT
143    Tag: george-20020523-visual-labels
144    Description:
145    
146    Labels are now displayed in the graphical output to make
147    the fall-through and target blocks obvious.
148    
149    ----------------------------------------------------------------------
150    Name: Matthias Blume
151    Date: 2002/05/22 11:03:00 EDT
152    Tag: blume-20020522-shrink
153    Description:
154    
155    John tweaked yesterday's fix for 1131 to handle an out-of-memory
156    situation that comes up when allocating huge arrays.
157    
158    ----------------------------------------------------------------------
159    Name: Matthias Blume
160    Date: 2002/05/21 16:00:00 EDT
161    Tag: Release_110_40
162    Description:
163    
164    New working release (110.40).  New bootfiles.
165    
166    [Also: John Reppy fixed GC bug 1131.]
167    
168    ----------------------------------------------------------------------
169    Name: Matthias Blume
170    Date: 2002/05/21 12:35:00 EDT
171    Tag: blume-20020521-cmdoc
172    Description:
173    
174    CM documentation update.
175    
176    ----------------------------------------------------------------------
177    Name: Matthias Blume
178    Date: 2002/05/21 10:55:00 EDT
179    Tag: blume-20020521-misc
180    Description:
181    
182    - John tweaked runtime to be silent on heap export (except when
183      GC messages are on).
184    - I added a few more things (cross-compiling versions of CMB) to
185      config/preloads (as suggestions).
186    
187    ----------------------------------------------------------------------
188    Name: Matthias Blume
189    Date: 2002/05/20 22:25:00 EDT
190    Tag: blume-20020520-controls
191    Description:
192    
193    - Added ControlUtil structure to control-lib.cm.
194    - Use it throughout.
195    - Used Controls facility to define MLRISC controls (as opposed to
196      registering MLRISC control ref cells with Controls after the fact)
197    - Fixed messed-up controls priorities.
198    
199    * Removed again all the stuff from config/preloads that one wouldn't
200      be able to preload at the time the initial heap image is built.
201      (Many libraries, e.g., CML, do not exist yet at this time.  The
202       only libraries that can be preloaded via config/preloads are those
203       that come bundled with the bootfiles.)
204    
205    ----------------------------------------------------------------------
206    Name: Matthias Blume
207    Date: 2002/05/20 10:59:00 EDT
208    Tag: blume-20020520-preloads
209    Description:
210    
211    Added a lot of commented-out suggestions for things to be included
212    in config/preloads.
213    
214    ----------------------------------------------------------------------
215    Name: Allen Leung
216    Date: 2002/05/18 14:20:00 EDT
217    Tag: leunga-20020518-mdl
218    Description:
219    
220    o Made the mdl tool stuff compile and run again.
221    o I've disabled all the stuff that depends on RTL specifications; they
222      are all badly broken anyway.
223    
224    ----------------------------------------------------------------------
225    Name: Matthias Blume
226    Date: 2002/05/17 16:49:00 EDT
227    Tag: blume-20020517-controls
228    Description:
229    
230    0. John Reppy made several modifications to the SML/NJ library.
231       In particular, there is a shiny new controls-lib.cm.
232    
233    1. Pushed new controls interface through compiler so that everything
234       compiles again.
235    
236    2. Added FormatComb and FORMAT_COMB to the CML version of the
237       SML/NJ library (so that CML compiles again).
238    
239    3. Modified init scripts because XXX_DEFAULT environment variables
240       are no longer with us.  (Boot-time initialization is now done
241       using the same environment variables that are also used for
242       startup-time initialization of controls.)
243    
244    ----------------------------------------------------------------------
245    Name: Lal George
246    Date: 2002/05/15 09:20:10 EDT
247    Tag: george-20020515-pseudo-op-decls
248    Description:
249    
250            All pseudo-ops emitted before the first segment declaration
251    such as TEXT, DATA, and BSS directives are assumed to be global
252    declarations and are emitted first in the assembly file. This is
253    useful in a number of situations where one has pseudo-ops that are not
254    specific to any segment, and also works around the constraint that one
255    cannot have client pseudo-ops in the TEXT segment.
256    
257            Because no segment is associated with these declarations it is
258    an error to allocate any space or objects before the first segment
259    directive and an exception will be raised. However, we cannot make
260    this check for client pseudo-ops.
261    
262            These top level declarations are a field in the CFG graph_info.
263    In theory you can continue to add to this field after the CFG has been
264    built -- provided you know what you are doing;-)
265    
266    ----------------------------------------------------------------------
267    Name: Matthias Blume
268    Date: 2002/05/13 16:40:00 EDT
269    Tag: blume-20020513-pp-etc
270    Description:
271    
272    A few minor bugfixes:
273    
274      - Stopgap measure for bug recently reported by Elsa Gunter (ppDec).
275        (Bogus printouts for redefined bindings still occur.  Compiler
276        bug should no longer occur now.  We need to redo the prettyprinter
277        from scratch.)
278    
279      - CM pathname printer now also adds escape sequences for ( and )
280    
281      - commend and docu fixes for ml-nlffi
282    
283    ----------------------------------------------------------------------
284    Name: Matthias Blume
285    Date: 2002/05/10 16:40:00 EDT
286    Tag: blume-20020510-erg-textio
287    Description:
288    
289    Applied the following bugfix provided by Emden Gansner:
290    
291        Output is corrupted when outputSubstr is used rather than output.
292    
293        The problem occurs when a substring
294    
295            ss = (s, dataStart, dataLen)
296    
297        where dataStart > 0, fills a stream buffer with avail bytes left.
298        avail bytes of s, starting at index dataStart, are copied into the
299        buffer, the buffer is flushed, and then the remaining dataLen-avail
300        bytes of ss are copied into the beginning of the buffer. Instead of
301        starting this copy at index dataStart+avail in s, the current code
302        starts the copy at index avail.
303    
304        Fix:
305        In text-io-fn.sml, change line 695 from
306             val needsFlush = copyVec(v, avail, dataLen-avail, buf, 0)
307        to
308             val needsFlush = copyVec(v, dataStart+avail, dataLen-avail, buf, 0)
309    
310    ----------------------------------------------------------------------
311    Name: Matthias Blume
312    Date: 2002/04/12 13:55:00 EDT
313    Tag: blume-20020412-assyntax
314    Description:
315    
316    1. Grabbed newer assyntax.h from the XFree86 project.
317    2. Fiddled with how to compile X86.prim.asm without warnings.
318    3. (Very) Minor cleanup in CM.
319    
320    ----------------------------------------------------------------------
321    Name: Matthias Blume
322    Date: 2002/04/01 (no joke!) 17:07:00 EST
323    Tag: blume-20020401-x86div
324    Description:
325    
326    Added full support for div/mod/rem/quot on the x86, using the machine
327    instruction's two results (without clumsily recomputing the remainder)
328    directly where appropriate.
329    
330    Some more extensive power-of-two support was added to the x86 instruction
331    selector (avoiding expensive divs, mods, and muls where they can be
332    replaced with cheaper shifts and masks).  However, this sort of thing
333    ought to be done earlier, e.g., within the CPS optimizer so that
334    all architectures benefit from it.
335    
336    The compiler compiles to a fixed point, but changes might be somewhat
337    fragile nevertheless.  Please, report any strange things that you might
338    see wrt. div/mod/quot/rem...
339    
340    ----------------------------------------------------------------------
341    Name: Matthias Blume
342    Date: 2002/03/29 17:22:00
343    Tag: blume-20020329-div
344    Description:
345    
346    Fixed my broken div/mod logic.  Unfortunately, this means that the
347    inline code for div/mod now has one more comparison than before.
348    Fast paths (quotient > 0 or remainder = 0) are not affected, though.
349    The problem was with quotient = 0, because that alone does not tell
350    us which way the rounding went.  One then has to look at whether
351    remainder and divisor have the same sign...  :(
352    
353    Anyway, I replaced the bootfiles with fresh ones...
354    
355    ----------------------------------------------------------------------
356    Name: Matthias Blume
357    Date: 2002/03/29 14:10:00 EST
358    Tag: blume-20020329-inlprims
359    Description:
360    
361    NEW BOOTFILES!!!    Version number bumped to 110.39.3.
362    
363    Primops have changed. This means that the bin/boot-file formats have
364    changed as well.
365    
366    To make sure that there is no confusion, I made a new version.
367    
368    
369    CHANGES:
370    
371    * removed REMT from mltree (remainder should never overflow).
372    
373    * added primops to deal with divisions of all flavors to the frontend
374    
375    * handled these primops all the way through so they map to their respective
376      MLRISC support
377    
378    * used these primops in the implementation of Int, Int32, Word, Word32
379    
380    * removed INLDIV, INLMOD, and INLREM as they are no longer necessary
381    
382    * parameterized INLMIN, INLMAX, and INLABS by a numkind
383    
384    * translate.sml now deals with all flavors of INL{MIN,MAX,ABS}, including
385      floating point
386    
387    * used INL{MIN,MAX,ABS} in the implementation of Int, Int32, Word, Word32,
388      and Real (but Real.abs maps to a separate floating-point-only primop)
389    
390    
391    TODO items:
392    
393    * Hacked Alpha32 instruction selection, disabling the selection of REMx
394      instructions because the machine instruction encoder cannot handle
395      them.  (Hppa, PPC, and Sparc instruction selection did not handle
396      REM in the first place, and REM is supported by the x86 machine coder.)
397    
398    * Handle DIV and MOD with DIV_TO_NEGINF directly in the x86 instruction
399      selection phase.  (The two can be streamlined because the hardware
400      delivers both quotient and remainder at the same time anyway.)
401    
402    * Think about what to do with "valOf(Int32.minInt) div ~1" and friends.
403      (Currently the behavior is inconsistent both across architectures and
404      wrt. the draft Basis spec.)
405    
406    * Word8 should eventually be handled natively, too.
407    
408    * There seems to be one serious bug in mltree-gen.sml.  It appears, though,
409      as if there currently is no execution path that could trigger it in
410      SML/NJ.  (The assumptions underlying functions arith and promotable do not
411      hold for things like multiplication and division.)
412    
413    ----------------------------------------------------------------------
414    Name: Matthias Blume
415    Date: 2002/03/27 16:27:00 EST
416    Tag: blume-20020327-mlrisc-divisions
417    Description:
418    
419    Added support for all four division operations (ML's div, mod, quot,
420    and rem) to MLRISC.  In the course of doing so, I also rationalized
421    the naming (no more annoying switch-around of DIV and QUOT), by
422    parameterizing the operation by div_rounding_mode (which can be either
423    DIV_TO_ZERO or DIV_TO_NEGINF).
424    
425    The generic MLTreeGen functor takes care of compiling all four
426    operations down to only round-to-zero div.
427    
428    Missing pieces:
429    
430      * Doing something smarter than relying on MLTreeGen on architectures
431        like, e.g., the x86 where hardware division delivers both quotient and
432        remainder at the same time.  With this, the implementation of the
433        round-to-neginf operations could be further streamlined.
434    
435      * Remove inlining support for div/mod/rem from the frontend and replace it
436        with primops that get carried through to the backend.  Do this for all
437        int and word types.
438    
439    ----------------------------------------------------------------------
440    Name: Matthias Blume
441    Date: 2002/03/25 17:25:00 EST
442    Tag: blume-20020325-divmod
443    Description:
444    
445    I improved (hopefully without breaking them) the implementation of Int.div,
446    Int.mod, and Int.rem.   For this, the code in translate.sml now takes
447    advantage of the following observations:
448    
449      Let  q = x quot y      r = x rem y
450           d = x div  y      m = x mod y
451    
452    where "quot" is the round-to-zero version of integer division that
453    hardware usually provides.  Then we have:
454    
455         r = x - q * y        where neither the * nor the - will overflow
456         d = if q >= 0 orelse x = q * y then q else q - 1
457                              where neither the * nor the - will overflow
458         m = if q >= 0 orelse r = 0 then r else r + y
459                              where the + will not overflow
460    
461    This results in substantial simplification of the generated code.
462    The following table shows the number of CFG nodes and edges generated
463    for
464            fun f (x, y) = x OPER y
465            (* with OPER \in div, mod, quot, rem *)
466    
467    
468        OPER | nodes(old) | edges(old) | nodes(new) | edges(new)
469        --------------------------------------------------------
470         div |         24 |         39 |         12 |         16
471         mod |         41 |         71 |         12 |         16
472        quot |          8 |         10 |          8 |         10
473         rem |         10 |         14 |          8 |         10
474    
475    
476    ----------------------------------------------------------------------
477    Name: Matthias Blume
478    Date: 2002/03/25 22:06:00 EST
479    Tag: blume-20020325-cprotobug
480    Description:
481    
482    Fixed a bug in cproto (c prototype decoder).
483    
484    ----------------------------------------------------------------------
485    Name: Matthias Blume
486  Date: 2002/03/25 16:00:00 EST  Date: 2002/03/25 16:00:00 EST
487  Tag: blume-20020325-raw-primops  Tag: blume-20020325-raw-primops
488  Description:  Description:

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