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Diffstat (limited to 'arch/arm26/nwfpe/ChangeLog')
| -rw-r--r-- | arch/arm26/nwfpe/ChangeLog | 83 |
1 files changed, 0 insertions, 83 deletions
diff --git a/arch/arm26/nwfpe/ChangeLog b/arch/arm26/nwfpe/ChangeLog deleted file mode 100644 index 0c580f764baf..000000000000 --- a/arch/arm26/nwfpe/ChangeLog +++ /dev/null @@ -1,83 +0,0 @@ -2002-01-19 Russell King <rmk@arm.linux.org.uk> - - * fpa11.h - Add documentation - - remove userRegisters pointer from this structure. - - add new method to obtain integer register values. - * softfloat.c - Remove float128 - * softfloat.h - Remove float128 - * softfloat-specialize - Remove float128 - - * The FPA11 structure is not a kernel-specific data structure. - It is used by users of ptrace to examine the values of the - floating point registers. Therefore, any changes to the - FPA11 structure (size or position of elements contained - within) have to be well thought out. - - * Since 128-bit float requires the FPA11 structure to change - size, it has been removed. 128-bit float is currently unused, - and needs various things to be re-worked so that we won't - overflow the available space in the task structure. - - * The changes are designed to break any patch that goes on top - of this code, so that the authors properly review their changes. - -1999-08-19 Scott Bambrough <scottb@netwinder.org> - - * fpmodule.c - Changed version number to 0.95 - * fpa11.h - modified FPA11, FPREG structures - * fpa11.c - Changes due to FPA11, FPREG structure alterations. - * fpa11_cpdo.c - Changes due to FPA11, FPREG structure alterations. - * fpa11_cpdt.c - Changes due to FPA11, FPREG structure alterations. - * fpa11_cprt.c - Changes due to FPA11, FPREG structure alterations. - * single_cpdo.c - Changes due to FPA11, FPREG structure alterations. - * double_cpdo.c - Changes due to FPA11, FPREG structure alterations. - * extended_cpdo.c - Changes due to FPA11, FPREG structure alterations. - - * I discovered several bugs. First and worst is that the kernel - passes in a pointer to the FPE's state area. This is defined - as a struct user_fp (see user.h). This pointer was cast to a - FPA11*. Unfortunately FPA11 and user_fp are of different sizes; - user_fp is smaller. This meant that the FPE scribbled on things - below its area, which is bad, as the area is in the thread_struct - embedded in the process task structure. Thus we were scribbling - over one of the most important structures in the entire OS. - - * user_fp and FPA11 have now been harmonized. Most of the changes - in the above code were dereferencing problems due to moving the - register type out of FPREG, and getting rid of the union variable - fpvalue. - - * Second I noticed resetFPA11 was not always being called for a - task. This should happen on the first floating point exception - that occurs. It is controlled by init_flag in FPA11. The - comment in the code beside init_flag state the kernel guarantees - this to be zero. Not so. I found that the kernel recycles task - structures, and that recycled ones may not have init_flag zeroed. - I couldn't even find anything that guarantees it is zeroed when - when the task structure is initially allocated. In any case - I now initialize the entire FPE state in the thread structure to - zero when allocated and recycled. See alloc_task_struct() and - flush_thread() in arch/arm/process.c. The change to - alloc_task_struct() may not be necessary, but I left it in for - completeness (better safe than sorry). - -1998-11-23 Scott Bambrough <scottb@netwinder.org> - - * README.FPE - fix typo in description of lfm/sfm instructions - * NOTES - Added file to describe known bugs/problems - * fpmodule.c - Changed version number to 0.94 - -1998-11-20 Scott Bambrough <scottb@netwinder.org> - - * README.FPE - fix description of URD, NRM instructions - * TODO - remove URD, NRM instructions from TODO list - * single_cpdo.c - implement URD, NRM - * double_cpdo.c - implement URD, NRM - * extended_cpdo.c - implement URD, NRM - -1998-11-19 Scott Bambrough <scottb@netwinder.org> - - * ChangeLog - Added this file to track changes made. - * fpa11.c - added code to initialize register types to typeNone - * fpa11_cpdt.c - fixed bug in storeExtended (typeExtended changed to - typeDouble in switch statement) |