diff options
author | Linus Torvalds <torvalds@ppc970.osdl.org> | 2005-04-16 18:20:36 -0400 |
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committer | Linus Torvalds <torvalds@ppc970.osdl.org> | 2005-04-16 18:20:36 -0400 |
commit | 1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 (patch) | |
tree | 0bba044c4ce775e45a88a51686b5d9f90697ea9d /arch/arm/nwfpe/ChangeLog |
Linux-2.6.12-rc2
Initial git repository build. I'm not bothering with the full history,
even though we have it. We can create a separate "historical" git
archive of that later if we want to, and in the meantime it's about
3.2GB when imported into git - space that would just make the early
git days unnecessarily complicated, when we don't have a lot of good
infrastructure for it.
Let it rip!
Diffstat (limited to 'arch/arm/nwfpe/ChangeLog')
-rw-r--r-- | arch/arm/nwfpe/ChangeLog | 91 |
1 files changed, 91 insertions, 0 deletions
diff --git a/arch/arm/nwfpe/ChangeLog b/arch/arm/nwfpe/ChangeLog new file mode 100644 index 00000000000..eeb5a7c5ff0 --- /dev/null +++ b/arch/arm/nwfpe/ChangeLog | |||
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1 | 2003-03-22 Ralph Siemsen <ralphs@netwinder.org> | ||
2 | * Reformat all but softfloat files to get a consistent coding style. | ||
3 | Used "indent -kr -i8 -ts8 -sob -l132 -ss" and a few manual fixups. | ||
4 | * Removed dead code and fixed function protypes to match definitions. | ||
5 | * Consolidated use of (opcode && MASK_ARITHMETIC_OPCODE) >> 20. | ||
6 | * Make 80-bit precision a compile-time option. (1%) | ||
7 | * Only initialize FPE state once in repeat-FP situations. (6%) | ||
8 | |||
9 | 2002-01-19 Russell King <rmk@arm.linux.org.uk> | ||
10 | |||
11 | * fpa11.h - Add documentation | ||
12 | - remove userRegisters pointer from this structure. | ||
13 | - add new method to obtain integer register values. | ||
14 | * softfloat.c - Remove float128 | ||
15 | * softfloat.h - Remove float128 | ||
16 | * softfloat-specialize - Remove float128 | ||
17 | |||
18 | * The FPA11 structure is not a kernel-specific data structure. | ||
19 | It is used by users of ptrace to examine the values of the | ||
20 | floating point registers. Therefore, any changes to the | ||
21 | FPA11 structure (size or position of elements contained | ||
22 | within) have to be well thought out. | ||
23 | |||
24 | * Since 128-bit float requires the FPA11 structure to change | ||
25 | size, it has been removed. 128-bit float is currently unused, | ||
26 | and needs various things to be re-worked so that we won't | ||
27 | overflow the available space in the task structure. | ||
28 | |||
29 | * The changes are designed to break any patch that goes on top | ||
30 | of this code, so that the authors properly review their changes. | ||
31 | |||
32 | 1999-08-19 Scott Bambrough <scottb@netwinder.org> | ||
33 | |||
34 | * fpmodule.c - Changed version number to 0.95 | ||
35 | * fpa11.h - modified FPA11, FPREG structures | ||
36 | * fpa11.c - Changes due to FPA11, FPREG structure alterations. | ||
37 | * fpa11_cpdo.c - Changes due to FPA11, FPREG structure alterations. | ||
38 | * fpa11_cpdt.c - Changes due to FPA11, FPREG structure alterations. | ||
39 | * fpa11_cprt.c - Changes due to FPA11, FPREG structure alterations. | ||
40 | * single_cpdo.c - Changes due to FPA11, FPREG structure alterations. | ||
41 | * double_cpdo.c - Changes due to FPA11, FPREG structure alterations. | ||
42 | * extended_cpdo.c - Changes due to FPA11, FPREG structure alterations. | ||
43 | |||
44 | * I discovered several bugs. First and worst is that the kernel | ||
45 | passes in a pointer to the FPE's state area. This is defined | ||
46 | as a struct user_fp (see user.h). This pointer was cast to a | ||
47 | FPA11*. Unfortunately FPA11 and user_fp are of different sizes; | ||
48 | user_fp is smaller. This meant that the FPE scribbled on things | ||
49 | below its area, which is bad, as the area is in the thread_struct | ||
50 | embedded in the process task structure. Thus we were scribbling | ||
51 | over one of the most important structures in the entire OS. | ||
52 | |||
53 | * user_fp and FPA11 have now been harmonized. Most of the changes | ||
54 | in the above code were dereferencing problems due to moving the | ||
55 | register type out of FPREG, and getting rid of the union variable | ||
56 | fpvalue. | ||
57 | |||
58 | * Second I noticed resetFPA11 was not always being called for a | ||
59 | task. This should happen on the first floating point exception | ||
60 | that occurs. It is controlled by init_flag in FPA11. The | ||
61 | comment in the code beside init_flag state the kernel guarantees | ||
62 | this to be zero. Not so. I found that the kernel recycles task | ||
63 | structures, and that recycled ones may not have init_flag zeroed. | ||
64 | I couldn't even find anything that guarantees it is zeroed when | ||
65 | when the task structure is initially allocated. In any case | ||
66 | I now initialize the entire FPE state in the thread structure to | ||
67 | zero when allocated and recycled. See alloc_task_struct() and | ||
68 | flush_thread() in arch/arm/process.c. The change to | ||
69 | alloc_task_struct() may not be necessary, but I left it in for | ||
70 | completeness (better safe than sorry). | ||
71 | |||
72 | 1998-11-23 Scott Bambrough <scottb@netwinder.org> | ||
73 | |||
74 | * README.FPE - fix typo in description of lfm/sfm instructions | ||
75 | * NOTES - Added file to describe known bugs/problems | ||
76 | * fpmodule.c - Changed version number to 0.94 | ||
77 | |||
78 | 1998-11-20 Scott Bambrough <scottb@netwinder.org> | ||
79 | |||
80 | * README.FPE - fix description of URD, NRM instructions | ||
81 | * TODO - remove URD, NRM instructions from TODO list | ||
82 | * single_cpdo.c - implement URD, NRM | ||
83 | * double_cpdo.c - implement URD, NRM | ||
84 | * extended_cpdo.c - implement URD, NRM | ||
85 | |||
86 | 1998-11-19 Scott Bambrough <scottb@netwinder.org> | ||
87 | |||
88 | * ChangeLog - Added this file to track changes made. | ||
89 | * fpa11.c - added code to initialize register types to typeNone | ||
90 | * fpa11_cpdt.c - fixed bug in storeExtended (typeExtended changed to | ||
91 | typeDouble in switch statement) | ||