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revision 819, Mon May 7 18:39:08 2001 UTC revision 841, Fri Jun 15 21:38:20 2001 UTC
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11  Date:  Date:
12  Tag: <post-commit CVS tag>  Tag: <post-commit CVS tag>
13  Description:  Description:
14    
15    ----------------------------------------------------------------------
16    Name: Matthias Blume
17    Date: 2001/06/15 15:05:00 EDT
18    Tag: blume-20010615-moresparc
19    Description:
20    
21    Here is a short late-hour update related to Sparc c-calls:
22    
23     -- made handling of double-word arguments a bit smarter
24    
25     -- instruction selection phase tries to collapse certain clumsily
26        constructed ML-Trees; typical example:
27    
28            ADD(ty,ADD(_,e,LI d1),LI d2)  ->  ADD(ty,e,LI(d1+d2))
29    
30        This currently has no further impact on SML/NJ since mlriscGen does
31        not seem to generate such patterns in the first place, and c-calls
32        (which did generate them in the beginning) has meanwhile been fixed
33        so as to avoid them as well.
34    
35    ----------------------------------------------------------------------
36    Name: Matthias Blume
37    Date: 2001/06/15 15:05:00 EDT
38    Tag: blume-20010615-sparc
39    Description:
40    
41    The purpose of this update is to provide an implementation of NLFFI
42    on Sparc machines.
43    
44    Here are the changes in detail:
45    
46       * src/MLRISC/sparc/c-calls/sparc-c-calls.sml is a new file containing
47       the Sparc implementation of the c-calls API.
48       * The Sparc backend of SML/NJ has been modified to uniformely use %fp
49       for accessing the ML frame.  Thus, we have a real frame pointer and
50       can freely modify %sp without need for an omit-frame-ptr phase.
51       The vfp logic in src/compiler/CodeGen/* has been changed to accomodate
52       this case.
53       * ml-nlffigen has been taught to produce code for different architectures
54       and calling conventions.
55       * In a way similar to what was done in the x86 case, the Sparc
56       backend uses its own specific extension to mltree.  (For example,
57       it needs to be able to generate UNIMP instructions which are part
58       of the calling convention.)
59       * ml-nlffi-lib was reorganized to make it more modular (in particular,
60       to make it easier to plug in new machine- and os-dependent parts).
61    
62    There are some other fairly unrelated bug fixes and cleanups as well:
63    
64       * I further hacked the .cm files for MLRISC tools (like MDLGen) so
65       that they properly share their libraries with existing SML/NJ libraries.
66       * I fixed a minor cosmetic bug in CM, supressing certain spurious
67       follow-up error messages.
68       * Updates to CM/CMB documentation.
69    
70    TODO items:
71    
72       * MLRISC should use a different register as its asmTemp on the Sparc.
73         (The current %o2 is a really bad choice because it is part of the
74         calling conventions, so things might interfere in unexpected ways.)
75    
76    ----------------------------------------------------------------------
77    Name: Matthias Blume
78    Date: 2001/06/07
79    Tag: blume-20010607-calls
80    Description:
81    
82    A number of internal changes related to C calls and calling conventions:
83    
84    1. ML-Tree CALL statements now carry a "pops" field.  It indicates the
85       number of bytes popped implicitly (by the callee).  In most cases
86       this field is 0 but on x86/win32 it is some non-zero value.  This
87       is information provided for the benefit of the "omit-frameptr" pass.
88    2. The CALL instruction on the x86 carries a similar "pops" field.
89       The instruction selection phase copies its value from the ML-Tree
90       CALL statement.
91    3. On all other architectures, the instruction selection phase checks
92       whether "pops=0" and complains if not.
93    4. The c-calls implementation for x86 now accepts two calling conventions:
94       "ccall" and "stdcall".  When "ccall" is selected, the caller cleans
95       up after the call and pops is set to 0.  For "stdcall", the caller
96       does nothing, leaving the cleanup to the callee; pops is set to
97       the number of bytes that were pushed onto the stack.
98    5. The cproto decoder (compiler/Semant/types/cproto.sml) now can
99       distinguish between "ccall" and "stdcall".
100    6. The UNIMP instruction has been added to the supported Sparc instruction
101       set. (This is needed for implementing the official C calling convention
102       on this architecture.)
103    7. I fixed some of the .cm files under src/MLRISC/Tools to make them
104       work with the latest CM.
105    
106    ----------------------------------------------------------------------
107    Name: Matthias Blume
108    Date: 2001/06/05 15:10:00 EDT
109    Tag: blume-20010605-cm-index
110    Description:
111    
112    0. The "lambdasplit" parameter for class "sml" in CM has been documented.
113    
114    1. CM can now generate "index files".  These are human-readable files
115       that list on a per-.cm-file basis each toplevel symbol defined or
116       imported.  The location of the index file for
117       <p>/<d>.cm is <p>/CM/INDEX/<d>.cm.
118       To enable index-file generation, set CM.Control.generate_index to true
119       or export an environment-symbol: export CM_GENERATE_INDEX=true.
120    
121       The CM manual has been updated accordingly.
122    
123    2. I made some slight modifications to the c-calls API in MLRISC.
124    
125         a) There is now a callback to support saving/restoring of
126            dedicated but caller-save registers around the actual call
127            instruction.
128         b) One can optionally specify a comment-annotation for the
129            call instruction.
130    
131    3. SML/NJ (mlriscGen.sml) uses this new API for the rawccall primop.
132       (For example, the comment annotation shows the C prototype of
133        the function being called.)
134    
135    ----------------------------------------------------------------------
136    Name: Matthias Blume
137    Date: 2001/06/01 13:30:00 EDT
138    Tag: blume-20010601-nlffi-cleanup
139    Description:
140    
141    This is mostly a cleanup of MLFFI stuff:
142    
143       - some signature files have been put into a more exposed place
144       - the ugly 'f type parameter is gone (simplifies types tremendously!)
145       - ml-nlffigen changed accordingly
146       - tutorial updated
147    
148    Other changes:
149    
150       - author's affiliation in CM manual(s) updated
151       - some more recognized keywords added to Allen's sml.sty
152    
153    ----------------------------------------------------------------------
154    Name: Matthias Blume
155    Date: 2001/05/25 15:30:00 EDT
156    Tag: blume-20010525-iptr
157    Description:
158    
159      - put the official 110.33-README (as it appears on the ftp server) under
160        CVS
161      - fixed a small bug related to incomplete pointer types in
162        ml-nlffigen
163      - small cosmetic change to the ml-nlffi-lib's "arr" type constructor
164        (it does not need the 'f type parameter)
165    
166    ----------------------------------------------------------------------
167    Name: Matthias Blume
168    Date: 2001/05/23 14:30:00 EDT
169    Tag: Release_110_33
170    Description:
171    
172    New version number (110.33).  New bootfiles.
173    
174    ----------------------------------------------------------------------
175    Name: Matthias Blume
176    Date: 2001/05/22 18:06:00 EDT
177    Tag: blume-20010522-targets
178    Description:
179    
180    Made install.sh use file config/targets.customized if it exists, falling
181    back to config/targets if it doesn't.  This way one can have a customized
182    version of the targets file without touching the "real thing", thus
183    eliminating the constant fear of accidentally checking something bogus
184    back into the CVS repository...  (File config/targets.customized must
185    not be added to the repository!)
186    
187    ----------------------------------------------------------------------
188    Name: Matthias Blume
189    Date: 2001/05/22 16:30:00 EDT
190    Tag: blume-20010522-minitut
191    Description:
192    
193    1. Bug fix in ml-nlffigen; now (hopefully) correctly handling
194       struct returns.
195    2. Added src/ml-nlffi-lib/Doc/mini-tutorial.txt.  This is some very
196       incomplete, preliminary documentation for NLFFI.
197    
198    ----------------------------------------------------------------------
199    Name: Matthias Blume
200    Date: 2001/05/14 11:30:00 EDT
201    Tag: blume-20010514-script
202    Description:
203    
204    Some bugs in install script fixed.
205    
206    In addition to that I also made a slight change to the NLFFI API:
207    Functors generated by ml-nlffigen now take the dynamic library as a
208    straight functor argument, not as a suspended one.  (The original
209    functor code used to force the suspension right away anyway, so there
210    was nothing gained by this complication of the interface.)
211    
212    ----------------------------------------------------------------------
213    Name: Matthias Blume
214    Date: 2001/05/11 14:35:00 EDT
215    Tag: blume-20010511-ml-nlffi
216    Description:
217    
218    I finally took the plunge and added my new FFI code to the main
219    repository.  For x86-linux it is now ready for prime-time.
220    
221    There are two new subdirectories of "src":
222    
223      - ml-nlffi-lib:
224           The utility library for programs using the FFI interface.
225           Here is the implementation of $/c.cm and its associated low-level
226           partners $/c-int.cm and $/memory.cm.
227      - ml-nlffigen:
228           A stand-alone program for generating ML glue code from C source
229           code.
230    
231    Building ml-nlffigen requires $/ckit-lib.cm.
232    
233    The config/install.sh script has been updates to do the Right Thing
234    (hopefully).
235    
236    Notice that the source tree for the C-Kit will not be put under "src"
237    but directly under the installation root directory.  (This is the
238    structure that currently exists on the CVS server when you check out
239    module "sml".)  Fortunately, config/install.sh knows about this oddity.
240    
241    Bugs: No documentation yet.
242    
243    ----------------------------------------------------------------------
244    Name: Matthias Blume
245    Date: 2001/05/09 16:35:00 EDT
246    Tag: blume-20010509-cpscontract
247    Description:
248    
249    Fixed a bug in the accounting code in cpsopt/contract.sml.  (The
250    wrapper/unwrapper elimination did not decrement usage counts and some
251    dead variables got overlooked by the dead-up logic.)
252    
253    ----------------------------------------------------------------------
254    Name: Lal George
255    Date: 2001/05/08  17:26:09 EDT
256    Tag: george-20010508-omit-frameptr
257    Description:
258    
259    Changes to implement the omit-frame-pointer optimization to support
260    raw C calls. For now, there is only support on the Intel x86, but
261    other architectures will follow as more experience is gained with this.
262    
263    
264  ----------------------------------------------------------------------  ----------------------------------------------------------------------
265  Name: Matthias Blume  Name: Matthias Blume
266  Date: 2001/05/07 14:40:00 EDT  Date: 2001/05/07 14:40:00 EDT

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