Qml/QtQuick with Geode LX800

[maurofaresoftware.it]

Hi all.
My name's Mauro and I'm working on an old geode lx 800.
I'd like to use QML QtQuick with platform, but I get the fatal message

'The program requires X86 processor that supports SSE2 extensions at least a Pentium 4 or newer'

Can I workaround this requirement?

Geode LX 800 processor has this features from /proc/cpuinfo

processor : 0
vendor_id : AuthenticAMD
cpu family : 5
model : 10
model name : Geode(TM) Integrated Processor by AMD PCS
stepping : 2
cpu MHz : 498.061
cache size : 128 KB
fdiv_bug : no
f00f_bug : no
coma_bug : no
fpu : yes
fpu_exception : yes
cpuid level : 1
wp : yes
flags : fpu de pse tsc msr cx8 sep pge cmov clflush mmx mmxext 3dnowext 3dnow cpuid 3dnowprefetch vmmcall
bugs : sysret_ss_attrs spectre_v1 spectre_v2 spec_store_bypass
bogomips : 996.12
clflush size : 32
cache_alignment : 32
address sizes : 32 bits physical, 32 bits virtual
power management:

[fcarney]

Where is this error coming from? Qt Creator, the compiler, support tools, from a compile program?

[maurofaresoftware.it]

Hi.
The problem appears run time.
The check for SSE2 on intel platform is made in

qtdeclarative/src/qml/qml/v8/qv8engine.cpp at line 145

QV8Engine::QV8Engine(QV4::ExecutionEngine *v4)
: m_engine(nullptr)
, m_v4Engine(v4)
#if QT_CONFIG(qml_xml_http_request)
, m_xmlHttpRequestData(nullptr)
#endif
{
#ifndef Q_OS_WASM // wasm does not have working simd QTBUG-63924
#ifdef Q_PROCESSOR_X86_32
if (!qCpuHasFeature(SSE2)) {
qFatal("This program requires an X86 processor that supports SSE2 extension, at least a Pentium 4 or newer");
}
#endif
#endif

[SGaist]

Hi,

What version of Qt are you trying to build ?

What exact modules do you need ?

[maurofaresoftware.it]

I'm using QT 5.13.2 in yocto Zeus.
I need to build a simple UI.
I can make this UI with QtWidgets, but I'd like to use QML/QtQuick, if it is possible.

Now I comment-out the line and my application starts.

But I don't know how application run in the future

[fcarney]

@maurofaresoftware-it
If that is in v8, then you yes you need a newer cpu. That processor is not supporting the SSE2 instruction.

Edit:
v8 is the javascript engine in qml btw.