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| author | Thiago Macieira <thiago.macieira@nokia.com> | 2010-12-22 19:52:48 +0100 |
|---|---|---|
| committer | Qt by Nokia <qt-info@nokia.com> | 2011-09-08 17:32:00 +0200 |
| commit | 83ba0d56f878409d3f758549c72e5d099cc71a07 (patch) | |
| tree | d3b17493020d68682987d953a61cf5774464fc80 /src/v8/0002-Add-a-bit-field-3-to-Map.patch | |
| parent | 526c851902c9b2762179bb338a21e025e7f471ac (diff) | |
Add an SSE4.2 even simpler version of toLatin1
Use the new PCMPESTRM instruction (Parallel CoMPare Explicit-length
STRings with result in a Mask) which is added in SSE4.2 for
facilitating string operations. The "compare ranges" mode allows us to
search for characters outside the Latin 1 range and then use the
SSE4.1 PBLENDVB instruction to replace those with question marks.
Unlike previous SSE compare instructions, the PCMPxSTRx family allows
us to operate on unsigned 16-bit values. This saves us another
parallel add.
Reviewed-By: Samuel Rødal
(cherry picked from commit 45d2d36c9dbcbce403c78838ea52acd1ab111b68)
Change-Id: I0f9d864f9d19c0f0da43ccb6918dc28295074496
Reviewed-on: http://codereview.qt-project.org/4468
Reviewed-by: Qt Sanity Bot <qt_sanity_bot@ovi.com>
Reviewed-by: Oswald Buddenhagen <oswald.buddenhagen@nokia.com>
Reviewed-by: Samuel Rødal <samuel.rodal@nokia.com>
Diffstat (limited to 'src/v8/0002-Add-a-bit-field-3-to-Map.patch')
0 files changed, 0 insertions, 0 deletions