Commit 329e1e19 authored by Simon Dardis's avatar Simon Dardis
Browse files

[mips] 6.0 Release notes 

Reviewers: atanasyan, arichardson, petarj, smaksimovic, abeserminji

Differential Revision: https://reviews.llvm.org/D43573

llvm-svn: 325876
parent 8a2cebe2

llvm/docs/ReleaseNotes.rst

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@@ -113,8 +113,44 @@ Changes to the Hexagon Target 
Changes to the MIPS Target

--------------------------



 During this release ...



Fixed numerous bugs:



* fpowi on MIPS64 giving incorrect results when used with a negative integer.

* Usage of the asm 'c' constraint with the wrong datatype causing an

  assert/crash.

* Fixed a conversion bug when using the DSP ASE.

* Fixed an inconsistency where objects were not marked as using the microMIPS as

  when the micromips function attribute or the ".set micromips" directive was

  used.

* Reordered the MIPSR6 specific hazard scheduler pass to after the delay slot

  filler, fixing a class of rare edge case bugs where the delay slot filler

  would violate ISA restrictions.

* Fixed a crash when using a type of unknown size with gp relative addressing.

* Corrected the j macro for microMIPS.

* Corrected the encoding of movep for microMIPS32r6.

* Fixed an issue with the usage of insert instructions having an invalid set of

  operands.

* Fixed an issue where TLS symbols where not marked as such.

* Enabled the usage of register scavanging with MSA, due to its' shorter offsets

  for loads and stores.

* Corrected the ELF headers when using the DSP ASE.



New features:



* The long branch pass now generates some R6 specific instructions when

  targeting MIPSR6.

* The delay slot filler now performs more branch conversions if delay slots

  cannot be filled.

* The MIPS MT ASE is now fully supported.

* Added support for the ``lapc`` pseudo instruction.

* Improved the selection of multiple instructions (``dext``, ``nmadd``,

  ``nmsub``).

* Further improved microMIPS codesize reduction.



Deprecation notices:



* microMIPS64R6 support was been deprecated since 5.0, and has now been

  completely removed.



Changes to the PowerPC Target

-----------------------------