github.com/prattmic/llgo-embedded@v0.0.0-20150820070356-41cfecea0e1e/third_party/gofrontend/libffi/testsuite/libffi.call/many.c (about)

     1  /* Area:	ffi_call
     2     Purpose:	Check return value float, with many arguments
     3     Limitations:	none.
     4     PR:		none.
     5     Originator:	From the original ffitest.c  */
     6  
     7  /* { dg-do run } */
     8  #include "ffitest.h"
     9  
    10  #include <stdlib.h>
    11  #include <float.h>
    12  #include <math.h>
    13  
    14  static float ABI_ATTR many(float f1, float f2, float f3, float f4, float f5, float f6, float f7, float f8, float f9, float f10, float f11, float f12, float f13)
    15  {
    16  #if 0
    17    printf("%f %f %f %f %f %f %f %f %f %f %f %f %f\n",
    18  	 (double) f1, (double) f2, (double) f3, (double) f4, (double) f5, 
    19  	 (double) f6, (double) f7, (double) f8, (double) f9, (double) f10,
    20  	 (double) f11, (double) f12, (double) f13);
    21  #endif
    22  
    23    return f1+f2+f3+f4+f5+f6+f7+f8+f9+f10+f11+f12+f13;
    24  }
    25  
    26  int main (void)
    27  {
    28    ffi_cif cif;
    29    ffi_type *args[13];
    30    void *values[13];
    31    float fa[13];
    32    float f, ff;
    33    int i;
    34  
    35    for (i = 0; i < 13; i++)
    36      {
    37        args[i] = &ffi_type_float;
    38        values[i] = &fa[i];
    39        fa[i] = (float) i;
    40      }
    41  
    42      /* Initialize the cif */
    43      CHECK(ffi_prep_cif(&cif, ABI_NUM, 13,
    44  		       &ffi_type_float, args) == FFI_OK);
    45  
    46      ffi_call(&cif, FFI_FN(many), &f, values);
    47  
    48      ff =  many(fa[0], fa[1],
    49  	       fa[2], fa[3],
    50  	       fa[4], fa[5],
    51  	       fa[6], fa[7],
    52  	       fa[8], fa[9],
    53  	       fa[10],fa[11],fa[12]);
    54  
    55      if (fabs(f - ff) < FLT_EPSILON)
    56        exit(0);
    57      else
    58        abort();
    59  }