GitLab

Detail:
  This change fixes ticket #225 (post-indexed LDFD via r13 sometimes reading
  corrupted values).

Version 4.28. Tagged as 'FPASC-4_28'

Detail:
  Machine=32 is now built so that it doesn't use UMULL. This is because we
  now require it to operate on ARMv3 Risc PCs and A7000(+).
Admin:
  Untested, but should be low risk.

Version 4.27. Tagged as 'FPASC-4_27'

Detail:
Admin:


Version 4.26. Tagged as 'FPASC-4_26'

Version 4.25. Tagged as 'FPASC-4_25'

(already replaced by Tungsten and Phoebe).

Version 4.24. Tagged as 'FPASC-4_24'

Detail:
  Exports VersionNum to BBE.
  Also removed dynamic dependencies fom Makefile.
Admin:
  Tested in a Tungsten BBE build.

Retagged, since this won't affect existing builds.

Fixed an error in "UseCLZ" case (ie thus affecting only Iyonix currently), which broke certain denormalised cases of multiply, divide and remainder.

Problem originally reported on Iyonix discussion group (failed Paranoia tesst).

Version 4.23. Tagged as 'FPASC-4_23'

Retagged as 'FPASC-4_22'

Detail:
  Files modified: riscos.Makefile, MkRom310, MkRom350, MkRom, MkRomIyx
  Files added: riscos.MkRom380, MkRomUrs
               s.Phoebe, STB5, Tungsten
Admin:
  Upated from Kev's machine by Mike H.

Version 4.22. Tagged as 'FPASC-4_22'

Detail:
  doc.*
Admin:
  From Kev's machine.

  MVF/MNF/ABS of a denormalised number without a change of precision
  treated specially, much like signalling NaNs. This prevents spurious
  underflow traps if they're enabled. Previously

       ; Underflow traps on
       LDFS    F0,DenormalisedSingle
       MVFS    F0,F0

  or

       ; Underflow traps off
       LDFD    F0,SmallestNormalDouble
       MUFD    F0,F0,#0.5
       ; Turn underflow traps on
       STFD    F0,xxx

  would have generated traps.

* LDFP/STFP rearrangement of NaN significands reinstated, as DDT
  can now make use of it.

* Typos in over/underflow code for LDFP corrected.

* Makefile changed to build in rm.${SYSTEM} instead of rm.${MACHINE}.

* Experimental dynamic rounding controls added to FPSR (for emulator
  only). Currently disabled; does not affect LDFP or STFP yet.

Version 4.21. Tagged as 'FPASC-4_21'

New switch to allow use of CLZ.
Added Docs.

Version 4.20. Tagged as 'FPASC-4_20'

  * Moved stripdepnd out of Makefile;
  * Variants passed on amu command line.
Detail:
  * You can now specify the precise build variant of the FPEmulator by passing
    System=... and FPE_APCS=... on the amu command line. There are now more
    files in riscos.s to set the options for various types (as per Wimp).
    The default FPE as was is now built with: System="RO380" FPE_APCS="3/32bit"
Admin:
  Builds.
Version 4.19. Tagged as 'FPASC-4_19'

* Generated NaNs were always negative - they were supposed to have a sign
  based on the operands. As a side effect, some internal routines were not
  obeying their advertised API - this has been corrected.
* Generated NaNs no longer contained a reason code - this was a deliberate
  ARM change, but I'm going to have a philosophical disagreement and reverse
  it.

Version 4.18. Tagged as 'FPASC-4_18'

Version 4.17. Tagged as 'FPASC-4_17'

No new functionality or speed boosts - just accuracy improvements and bug
fixes. See comments in coresrc.s.toplevel for details.

Version 4.16. Tagged as 'FPASC-4_16'

Version 4.15. Tagged as 'FPASC-4_15'

* Fixes to allow correct builds for 26-bit systems (RISC OS 3.1) and 32-bit systems using the 32-bit core (RISC OS 3.5-3.7).

Version 4.14. Tagged as 'FPASC-4_14'

Detail:
  When the long multiply option was added on the Ursula branch, an inexplicable
  change to a single instruction in the original non-long multiply code
  appeared.
  Result would have been slightly inaccurate multiplies when both operands
  had more than 32 bits of mantissa.
  Original code restored.

Version 4.13. Tagged as 'FPASC-4_13'

Multiple context version of FP emulator and FPA support code - FP in callbacks and interrupts can now be yours.

  Exception dumps now available (integer and FP).

Detail:
* Changed to multiple-context version of the core. This will allow floating-
  point to be used safely in callbacks and interrupt routines (as long as
  you call the appropriate context changing SWIs). This activates the
  dormant SWIs FPEmulator_ChangeContext, FPEmulator_ContextLength and
  FPEmulator_InitContext. FPEmulator_DeactivateContext and
  FPEmulator_ActivateContext now have full functionality.

* Added new SWI interfaces to core: FPEmulator_Abort, FPEmulator_LoadContext
  and FPEmulator_SaveContext.

* On FP exceptions, integer registers are copied into the exception dump area.
  (TO DO: registers are USR mode ones - should take pains to figure out
  SVC or IRQ ones as required).

* The FPEmulator now has an exception dump area for floating point registers -
  a suitable version of Debugger will show these with *ShowFPRegs.

* FPEmulator_ChangeContext and FPEmulator_DeactivateContext now return -1
  for the default context.

* Run time detection of SVC stack position added.

* No longer creates a MessageTrans descriptor on the stack.

* Removed broken STM^ fudge from the FPA veneer, as the only StrongARMs that
  need it can't use the FPA.

* Fixed a typo in core_abort.

* Stopped continuous emulation runs crossing 4K page boundaries, with a view
  to improving abort handling.

* Use of DREG debugging macros fixed (line endings were being inserted in the
  wrong place).

* Prototype code to catch aborts inside the emulator and change the registers
  to make it look like the emulated instruction aborted. This is cute, but
  causes problems with anything like Ursula's lazy task-swapping. Really this
  needs to be done only on fatal aborts. Compiled out for now.

Version 4.12. Tagged as 'FPASC-4_12'

Detail:
  Now 32-bit module compatible.
Admin:
  Tested the 26-bit build in the Customer F5 build.
  32-bit build tested on prototype 32-bit RISC OS.


Version 4.11. Tagged as 'FPASC-4_11'

  Use of UMULL (compiled out).
  Service call table.
  Runs in UND32 mode (requires latest Kernel), giving a speed boost.

Version 4.10. Tagged as 'FPASC-4_10'

Changed to use srccommit.
German resources added.

Version 4.09. Tagged as 'FPASC-4_09'