Merge all conversions from Latin-1 in qstring.cpp into a single function

Amazing how many places had the conversion duplicated. When compiling
with GCC under -O3 (which enables -ftree-vectorize), GCC would use SIMD
by using the PMOVZXBW instruction, but only if the -msse4.1 was passed
(or equivalent -march= switch), which almost no one did.

Also, the two lastIndexOf and the qt_find_latin1_string updates are also
fixing bugs because the old code forgot to cast the input to uchar
first. That meant the compiler was generating sign-extension from 8 to
16 bits, as opposed to zero-extension.

Change-Id: I4e2430a51dfc337994834524d3540382157509ef
Reviewed-by: Lars Knoll <lars.knoll@digia.com>

0 files changed, 0 insertions, 0 deletions