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

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revision 1181, Wed Mar 27 21:27:27 2002 UTC revision 1220, Wed May 22 15:04:10 2002 UTC
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14    
15  ----------------------------------------------------------------------  ----------------------------------------------------------------------
16  Name: Matthias Blume  Name: Matthias Blume
17    Date: 2002/05/22 11:03:00 EDT
18    Tag: blume-20020522-shrink
19    Description:
20    
21    John tweaked yesterday's fix for 1131 to handle an out-of-memory
22    situation that comes up when allocating huge arrays.
23    
24    ----------------------------------------------------------------------
25    Name: Matthias Blume
26    Date: 2002/05/21 16:00:00 EDT
27    Tag: Release_110_40
28    Description:
29    
30    New working release (110.40).  New bootfiles.
31    
32    [Also: John Reppy fixed GC bug 1131.]
33    
34    ----------------------------------------------------------------------
35    Name: Matthias Blume
36    Date: 2002/05/21 12:35:00 EDT
37    Tag: blume-20020521-cmdoc
38    Description:
39    
40    CM documentation update.
41    
42    ----------------------------------------------------------------------
43    Name: Matthias Blume
44    Date: 2002/05/21 10:55:00 EDT
45    Tag: blume-20020521-misc
46    Description:
47    
48    - John tweaked runtime to be silent on heap export (except when
49      GC messages are on).
50    - I added a few more things (cross-compiling versions of CMB) to
51      config/preloads (as suggestions).
52    
53    ----------------------------------------------------------------------
54    Name: Matthias Blume
55    Date: 2002/05/20 22:25:00 EDT
56    Tag: blume-20020520-controls
57    Description:
58    
59    - Added ControlUtil structure to control-lib.cm.
60    - Use it throughout.
61    - Used Controls facility to define MLRISC controls (as opposed to
62      registering MLRISC control ref cells with Controls after the fact)
63    - Fixed messed-up controls priorities.
64    
65    * Removed again all the stuff from config/preloads that one wouldn't
66      be able to preload at the time the initial heap image is built.
67      (Many libraries, e.g., CML, do not exist yet at this time.  The
68       only libraries that can be preloaded via config/preloads are those
69       that come bundled with the bootfiles.)
70    
71    ----------------------------------------------------------------------
72    Name: Matthias Blume
73    Date: 2002/05/20 10:59:00 EDT
74    Tag: blume-20020520-preloads
75    Description:
76    
77    Added a lot of commented-out suggestions for things to be included
78    in config/preloads.
79    
80    ----------------------------------------------------------------------
81    Name: Allen Leung
82    Date: 2002/05/18 14:20:00 EDT
83    Tag: leunga-20020518-mdl
84    Description:
85    
86    o Made the mdl tool stuff compile and run again.
87    o I've disabled all the stuff that depends on RTL specifications; they
88      are all badly broken anyway.
89    
90    ----------------------------------------------------------------------
91    Name: Matthias Blume
92    Date: 2002/05/17 16:49:00 EDT
93    Tag: blume-20020517-controls
94    Description:
95    
96    0. John Reppy made several modifications to the SML/NJ library.
97       In particular, there is a shiny new controls-lib.cm.
98    
99    1. Pushed new controls interface through compiler so that everything
100       compiles again.
101    
102    2. Added FormatComb and FORMAT_COMB to the CML version of the
103       SML/NJ library (so that CML compiles again).
104    
105    3. Modified init scripts because XXX_DEFAULT environment variables
106       are no longer with us.  (Boot-time initialization is now done
107       using the same environment variables that are also used for
108       startup-time initialization of controls.)
109    
110    ----------------------------------------------------------------------
111    Name: Lal George
112    Date: 2002/05/15 09:20:10 EDT
113    Tag: george-20020515-pseudo-op-decls
114    Description:
115    
116            All pseudo-ops emitted before the first segment declaration
117    such as TEXT, DATA, and BSS directives are assumed to be global
118    declarations and are emitted first in the assembly file. This is
119    useful in a number of situations where one has pseudo-ops that are not
120    specific to any segment, and also works around the constraint that one
121    cannot have client pseudo-ops in the TEXT segment.
122    
123            Because no segment is associated with these declarations it is
124    an error to allocate any space or objects before the first segment
125    directive and an exception will be raised. However, we cannot make
126    this check for client pseudo-ops.
127    
128            These top level declarations are a field in the CFG graph_info.
129    In theory you can continue to add to this field after the CFG has been
130    built -- provided you know what you are doing;-)
131    
132    ----------------------------------------------------------------------
133    Name: Matthias Blume
134    Date: 2002/05/13 16:40:00 EDT
135    Tag: blume-20020513-pp-etc
136    Description:
137    
138    A few minor bugfixes:
139    
140      - Stopgap measure for bug recently reported by Elsa Gunter (ppDec).
141        (Bogus printouts for redefined bindings still occur.  Compiler
142        bug should no longer occur now.  We need to redo the prettyprinter
143        from scratch.)
144    
145      - CM pathname printer now also adds escape sequences for ( and )
146    
147      - commend and docu fixes for ml-nlffi
148    
149    ----------------------------------------------------------------------
150    Name: Matthias Blume
151    Date: 2002/05/10 16:40:00 EDT
152    Tag: blume-20020510-erg-textio
153    Description:
154    
155    Applied the following bugfix provided by Emden Gansner:
156    
157        Output is corrupted when outputSubstr is used rather than output.
158    
159        The problem occurs when a substring
160    
161            ss = (s, dataStart, dataLen)
162    
163        where dataStart > 0, fills a stream buffer with avail bytes left.
164        avail bytes of s, starting at index dataStart, are copied into the
165        buffer, the buffer is flushed, and then the remaining dataLen-avail
166        bytes of ss are copied into the beginning of the buffer. Instead of
167        starting this copy at index dataStart+avail in s, the current code
168        starts the copy at index avail.
169    
170        Fix:
171        In text-io-fn.sml, change line 695 from
172             val needsFlush = copyVec(v, avail, dataLen-avail, buf, 0)
173        to
174             val needsFlush = copyVec(v, dataStart+avail, dataLen-avail, buf, 0)
175    
176    ----------------------------------------------------------------------
177    Name: Matthias Blume
178    Date: 2002/04/12 13:55:00 EDT
179    Tag: blume-20020412-assyntax
180    Description:
181    
182    1. Grabbed newer assyntax.h from the XFree86 project.
183    2. Fiddled with how to compile X86.prim.asm without warnings.
184    3. (Very) Minor cleanup in CM.
185    
186    ----------------------------------------------------------------------
187    Name: Matthias Blume
188    Date: 2002/04/01 (no joke!) 17:07:00 EST
189    Tag: blume-20020401-x86div
190    Description:
191    
192    Added full support for div/mod/rem/quot on the x86, using the machine
193    instruction's two results (without clumsily recomputing the remainder)
194    directly where appropriate.
195    
196    Some more extensive power-of-two support was added to the x86 instruction
197    selector (avoiding expensive divs, mods, and muls where they can be
198    replaced with cheaper shifts and masks).  However, this sort of thing
199    ought to be done earlier, e.g., within the CPS optimizer so that
200    all architectures benefit from it.
201    
202    The compiler compiles to a fixed point, but changes might be somewhat
203    fragile nevertheless.  Please, report any strange things that you might
204    see wrt. div/mod/quot/rem...
205    
206    ----------------------------------------------------------------------
207    Name: Matthias Blume
208    Date: 2002/03/29 17:22:00
209    Tag: blume-20020329-div
210    Description:
211    
212    Fixed my broken div/mod logic.  Unfortunately, this means that the
213    inline code for div/mod now has one more comparison than before.
214    Fast paths (quotient > 0 or remainder = 0) are not affected, though.
215    The problem was with quotient = 0, because that alone does not tell
216    us which way the rounding went.  One then has to look at whether
217    remainder and divisor have the same sign...  :(
218    
219    Anyway, I replaced the bootfiles with fresh ones...
220    
221    ----------------------------------------------------------------------
222    Name: Matthias Blume
223    Date: 2002/03/29 14:10:00 EST
224    Tag: blume-20020329-inlprims
225    Description:
226    
227    NEW BOOTFILES!!!    Version number bumped to 110.39.3.
228    
229    Primops have changed. This means that the bin/boot-file formats have
230    changed as well.
231    
232    To make sure that there is no confusion, I made a new version.
233    
234    
235    CHANGES:
236    
237    * removed REMT from mltree (remainder should never overflow).
238    
239    * added primops to deal with divisions of all flavors to the frontend
240    
241    * handled these primops all the way through so they map to their respective
242      MLRISC support
243    
244    * used these primops in the implementation of Int, Int32, Word, Word32
245    
246    * removed INLDIV, INLMOD, and INLREM as they are no longer necessary
247    
248    * parameterized INLMIN, INLMAX, and INLABS by a numkind
249    
250    * translate.sml now deals with all flavors of INL{MIN,MAX,ABS}, including
251      floating point
252    
253    * used INL{MIN,MAX,ABS} in the implementation of Int, Int32, Word, Word32,
254      and Real (but Real.abs maps to a separate floating-point-only primop)
255    
256    
257    TODO items:
258    
259    * Hacked Alpha32 instruction selection, disabling the selection of REMx
260      instructions because the machine instruction encoder cannot handle
261      them.  (Hppa, PPC, and Sparc instruction selection did not handle
262      REM in the first place, and REM is supported by the x86 machine coder.)
263    
264    * Handle DIV and MOD with DIV_TO_NEGINF directly in the x86 instruction
265      selection phase.  (The two can be streamlined because the hardware
266      delivers both quotient and remainder at the same time anyway.)
267    
268    * Think about what to do with "valOf(Int32.minInt) div ~1" and friends.
269      (Currently the behavior is inconsistent both across architectures and
270      wrt. the draft Basis spec.)
271    
272    * Word8 should eventually be handled natively, too.
273    
274    * There seems to be one serious bug in mltree-gen.sml.  It appears, though,
275      as if there currently is no execution path that could trigger it in
276      SML/NJ.  (The assumptions underlying functions arith and promotable do not
277      hold for things like multiplication and division.)
278    
279    ----------------------------------------------------------------------
280    Name: Matthias Blume
281  Date: 2002/03/27 16:27:00 EST  Date: 2002/03/27 16:27:00 EST
282  Tag: blume-20020327-mlrisc-divisions  Tag: blume-20020327-mlrisc-divisions
283  Description:  Description:

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