Qt-interest Archive, June 2007
Compiling 4.3 on OS X with SSE2
Message 1 in thread
I noticed as I watched all the "configure" stuff scroll by that on OS X
using GCC 4.x (latest Xcode for Tiger) that mmx/sse/sse2 were all OFF.
Are those supported on OS X? Do I need a different compiler to support
them?
Just curious
Mike Jackson
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Message 2 in thread
On Friday 01 June 2007 05:26, Mike Jackson wrote:
> I noticed as I watched all the "configure" stuff scroll by that on OS X
> using GCC 4.x (latest Xcode for Tiger) that mmx/sse/sse2 were all OFF.
> Are those supported on OS X? Do I need a different compiler to support
> them?
>
> Just curious
> Mike Jackson
>
Hi Mike,
currently there's a limitation in our build system that prevents us from
enabling the mmx/sse optimizations on the Mac. If you're compiling for x86
only (not making a universal package) you can force sse2 to be used by:
Change the line:
CONFIG -= x11 qt
to:
CONFIG -= x11 qt app_bundle
in these files:
config.tests/unix/mmx/mmx.pro
config.tests/unix/sse/sse.pro
config.tests/unix/sse2/sse2.pro
and then apply the following patch to src/gui/painting/painting.pri:
@@ -148,9 +148,7 @@
DEFINES += QT_NO_CUPS QT_NO_LPR
}
-mac {
-
-} else:if(mmx|3dnow|sse|sse2|iwmmxt) {
+if(mmx|3dnow|sse|sse2|iwmmxt) {
HEADERS += painting/qdrawhelper_x86_p.h \
painting/qdrawhelper_mmx_p.h \
painting/qdrawhelper_sse_p.h
Run configure again and recompile.
Good luck -)
--
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Message 3 in thread
On 2007-06-01 03:43:12 -0400, Håvard Wall <hwall@xxxxxxxxxxxxx> said:
> On Friday 01 June 2007 05:26, Mike Jackson wrote:
>> I noticed as I watched all the "configure" stuff scroll by that on OS X
>> using GCC 4.x (latest Xcode for Tiger) that mmx/sse/sse2 were all OFF.
>> Are those supported on OS X? Do I need a different compiler to support
>> them?
>>
>> Just curious
>> Mike Jackson
>>
>
> Hi Mike,
>
> currently there's a limitation in our build system that prevents us from
> enabling the mmx/sse optimizations on the Mac. If you're compiling for x86
> only (not making a universal package) you can force sse2 to be used by:
>
> Change the line:
> CONFIG -= x11 qt
> to:
> CONFIG -= x11 qt app_bundle
> in these files:
> config.tests/unix/mmx/mmx.pro
> config.tests/unix/sse/sse.pro
> config.tests/unix/sse2/sse2.pro
>
> and then apply the following patch to src/gui/painting/painting.pri:
> @@ -148,9 +148,7 @@
> DEFINES += QT_NO_CUPS QT_NO_LPR
> }
>
> -mac {
> -
> -} else:if(mmx|3dnow|sse|sse2|iwmmxt) {
> +if(mmx|3dnow|sse|sse2|iwmmxt) {
> HEADERS += painting/qdrawhelper_x86_p.h \
> painting/qdrawhelper_mmx_p.h \
> painting/qdrawhelper_sse_p.h
>
> Run configure again and recompile.
>
> Good luck -)
> --
> hw
Cool Thanks..
Just out of curiosity, what type of speed up does SSE2 provide?
Mike
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