wip: Add example files

Author: jdemel

compile.sh

@@ -0,0 +1,3 @@
+gcc -std=c17 -I/home/johannes/src/volk/include -x c main.c -o mainvolkgnuc -lm
+clang -std=c17 -I/home/johannes/src/volk/include -x c main.c -o mainvolkclangc -lm
+g++ -std=c++17 -I/home/johannes/src/volk/include -x c++ main.cc -o mainvolkcpp -lm -lfmt

main.c

@@ -0,0 +1,58 @@
+
+#include <stdio.h>
+#include <volk/volk_complex.h>
+
+int main(int argc, char* argv[])
+{
+    lv_32fc_t fc_cpl[4];
+    printf("float=%lu, complex float=%lu, complex float array[4]=%lu\n",
+           sizeof(float),
+           sizeof(lv_32fc_t),
+           sizeof(fc_cpl));
+
+    for (int i = 0; i < 4; i++) {
+        fc_cpl[i] = (i + 3) + I * (i + 8);
+
+        fc_cpl[i] = lv_cmake(i + 3, i + 8);
+    }
+    for (int i = 0; i < 4; i++) {
+        lv_32fc_t val = fc_cpl[i];
+        lv_32fc_t cval = conj(val);
+        lv_32fc_t gval = ~val;
+        lv_32fc_t mult = val * val;
+        printf("val      = %+.1f%+.1fj\n", creal(val), cimag(val));
+        printf("conj(val)= %+.1f%+.1fj\n", creal(cval), cimag(cval));
+        printf("gcc: ~val= %+.1f%+.1fj\n", creal(gval), cimag(gval));
+        printf("val*val  = %+.1f%+.1fj\n", creal(mult), cimag(mult));
+    }
+
+    lv_8sc_t sc_cpl[4];
+    printf("\n\nchar=%lu, complex char=%lu, complex char array[4]=%lu\n",
+           sizeof(char),
+           sizeof(lv_8sc_t),
+           sizeof(sc_cpl));
+
+    for (int i = 0; i < 4; i++) {
+        // lv_8sc_t value = (i + 3) + I * (i + 8);
+        // printf("value=%+hhi%+hhij\n", creal(value), cimag(value));
+        // sc_cpl[i] = (i + 3) + I * (i + 8);
+        sc_cpl[i] = lv_cmake(i + 3, i + 8);
+        // printf("%i + j %i\n", creal(sc_cpl[i]), cimag(sc_cpl[i]));
+    }
+    for (int i = 0; i < 4; i++) {
+        lv_8sc_t val = sc_cpl[i];
+        lv_8sc_t cval = conj(val);
+        // lv_8sc_t cval = lv_cmake(creal(val), -cimag(val));
+        lv_8sc_t gval = ~val;
+        lv_8sc_t mult = val * val;
+        printf("val      = %+hhi%+hhij\n", __real__ val, __imag__ val);
+        printf("conj(val)= %+hhi%+hhij\n", __real__ cval, __imag__ cval);
+        printf("gcc: ~val= %+hhi%+hhij\n", __real__ gval, __imag__ gval);
+        printf("val*val  = %+hhi%+hhij\n", __real__ mult, __imag__ mult);
+    }
+
+    //     char* values = (char*) sc_cpl;
+    //   for (int i = 0; i < 8; i++) {
+    //     printf("%hhi\n", values[i]);
+    //   }
+}

main.cc

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+#include <fmt/core.h>
+#include <cstdlib>
+#include <iostream>
+#include <vector>
+#include <complex>
+
+
+#include <volk/volk_complex.h>
+
+
+int main(int argc, char* argv[])
+{
+    lv_32fc_t fc_cpl[4];
+    fmt::print("float={}, complex float={}, complex float array[4]={}\n",
+               sizeof(float),
+               sizeof(lv_32fc_t),
+               sizeof(fc_cpl));
+
+
+    std::vector<lv_32fc_t> vec(4);
+    for (int i = 0; i < 4; i++) {
+        auto foo = std::complex<float>( (i + 3), (i + 8) );
+        fmt::print("std::complex: ({:+.1f}{:+.1f}j)\n", std::real(foo), std::imag(foo));
+        lv_32fc_t bar = lv_32fc_t{5, 6};
+        vec.at(i) = bar;
+        
+    }
+
+    for(auto &val : vec){
+        float r = __real__ val;
+        float i = __imag__ val;
+        fmt::print("sizeof(val)={}, {:+.1f}{:+.1f}j\n", sizeof(val), r, i);
+    }
+}