qudarap/tests/qgs_test.cc

0001 // name=qgs_test ; gcc $name.cc -std=c++11 -lstdc++ -I.. -I../../sysrap -I/usr/local/cuda/include -o /tmp/$name && /tmp/$name
0002 /**
0003 qgs_test.cc
0004 ==============
0005
0006 Using union to call things by different names::
0007
0008     What's in a name? That which we call a rose
0009     By any other name would smell as sweet;
0010
0011 * when loading and saving in and out of buffers the quad6 lingo is most convenient.
0012 * when using the genstep the more specific naming from
0013   the same storage struct is more convenient.
0014
0015 **/
0016 #include "vector_types.h"
0017 #include "scuda.h"
0018 #include "squad.h"
0019
0020 //#include "qgs.h"
0021
0022 struct TO
0023 {
0024     unsigned gencode ;
0025     unsigned q0_y ;
0026     unsigned q0_z ;
0027     unsigned q0_w ;
0028
0029     quad q1 ;
0030     quad q2 ;
0031     quad q3 ;
0032     quad q4 ;
0033
0034     float q5x ;
0035     float q5y ;
0036     float q5z ;
0037     float q5w ;
0038 };
0039
0040 struct QT
0041 {
0042     union
0043     {
0044         quad6 q ;
0045         TO    t ;
0046     };
0047 };
0048
0049
0050 int main(int argc, char** argv)
0051 {
0052     quad6 gs ;
0053     gs.zero();
0054
0055     gs.q0.u = make_uint4( 1u, 2u, 3u, 4u );
0056     gs.q5.f = make_float4( 1.f, 2.f, 3.f, 4.f );
0057
0058     QT qt ;
0059     qt.q = gs ;
0060
0061     printf("// qt.t.gencode  %d \n", qt.t.gencode  );
0062     printf("// qt.t.q5w      %10.4f \n", qt.t.q5w );
0063
0064     return 0 ;
0065 }