Changes between Version 30 and Version 31 of QtBackLog


Ignore:
Timestamp:
Nov 9, 2009 12:15:27 AM (11 years ago)
Author:
zecke@selfish.org
Comment:

Mention the ARM changes

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  • QtBackLog

    v30 v31  
    33=== Qt problems ===
    44||Description||Branch||Created on||Landed in||Landed Date||
    5 ||ARM optimized qdrawhelper is only enabled for RCVT (symbian). The  needs to be transferred to gcc inline assembly. This will optimize memfill, Source, SourceOver and some blend functions.|| || || || ||
    6 ||ARMv6 should be auto detected. Currently arm/armv6 can be passed as -embedded options. The benefit of ARMv6 in src/corelib is the use of atomic load and exchange, instead of the old "swap" extension. `__ARCH_ARM_6__` should be used to detect it.|| || || || ||
    7 ||Enabled pld (preload) in qdrawhelper for ARMv5te and upwards|| || || || ||
     5||~~ARM optimized qdrawhelper is only enabled for RCVT (symbian)~~ A pure armv4/C implementation was used giving a significant improvement too. The ARMv4 memfill implementation gave about a 1fps improvement. What is left is ARM neon code for the porter duff operations|| || || || ||
     6||The C version comp_func_SourceOver was improved giving a 10fps improvement on the test case.||[http://qt.gitorious.org/~zecke/qt/zeckes-qt/commits/merge/arm-asm-changes arm-asm-changes]||09.11.2009|| || ||
     7||ARMv6 should be auto detected. Currently arm/armv6 can be passed as -embedded options. The benefit of ARMv6 in src/corelib is the use of atomic load and exchange, instead of the old "swap" extension. `__ARCH_ARM_6__` should be used to detect it. The first part of ARM detection was done||[http://qt.gitorious.org/~zecke/qt/zeckes-qt/commits/merge/arm-asm-changes arm-asm-changes]||9.11.2009|| || ||
     8||Enabled pld (preload) in qdrawhelper for ARMv5te and upwards -- For GNU CC the arm revision is detected automatically and this gave a 1fps improvement.||[http://qt.gitorious.org/~zecke/qt/zeckes-qt/commits/merge/arm-asm-changes arm-asm-tweaks]||9.11.2009|| || ||
    89||Optimize scrolling of Windowsurfaces. Either optimize memcpy/memmove or consider using a tile based window surface|| || || || ||
    910||QImageReader deserves some optimatations. E.g. decode to the QImage provided to the decoder, do not parse every gif when trying to determine the size.||[http://qt.gitorious.org/~zecke/qt/zeckes-qt/commits/merge/qimagehandler-changes image-changes]|| || || ||