github.com/prattmic/llgo-embedded@v0.0.0-20150820070356-41cfecea0e1e/third_party/gofrontend/libffi/testsuite/libffi.call/float3.c (about)

     1  /* Area:	ffi_call
     2     Purpose:	Check float arguments with different orders.
     3     Limitations:	none.
     4     PR:		none.
     5     Originator:	From the original ffitest.c  */
     6  
     7  /* { dg-do run } */
     8  
     9  #include "ffitest.h"
    10  #include "float.h"
    11  
    12  #include <math.h>
    13  
    14  static double floating_1(float a, double b, long double c)
    15  {
    16    return (double) a + b + (double) c;
    17  }
    18  
    19  static double floating_2(long double a, double b, float c)
    20  {
    21    return (double) a + b + (double) c;
    22  }
    23  
    24  int main (void)
    25  {
    26    ffi_cif cif;
    27    ffi_type *args[MAX_ARGS];
    28    void *values[MAX_ARGS];
    29    double rd;
    30  
    31    float f;
    32    double d;
    33    long double ld;
    34  
    35    args[0] = &ffi_type_float;
    36    values[0] = &f;
    37    args[1] = &ffi_type_double;
    38    values[1] = &d;
    39    args[2] = &ffi_type_longdouble;
    40    values[2] = &ld;
    41  
    42    /* Initialize the cif */
    43    CHECK(ffi_prep_cif(&cif, FFI_DEFAULT_ABI, 3,
    44  		     &ffi_type_double, args) == FFI_OK);
    45  
    46    f = 3.14159;
    47    d = (double)1.0/(double)3.0;
    48    ld = 2.71828182846L;
    49  
    50    floating_1 (f, d, ld);
    51  
    52    ffi_call(&cif, FFI_FN(floating_1), &rd, values);
    53  
    54    CHECK(fabs(rd - floating_1(f, d, ld)) < DBL_EPSILON);
    55  
    56    args[0] = &ffi_type_longdouble;
    57    values[0] = &ld;
    58    args[1] = &ffi_type_double;
    59    values[1] = &d;
    60    args[2] = &ffi_type_float;
    61    values[2] = &f;
    62  
    63    /* Initialize the cif */
    64    CHECK(ffi_prep_cif(&cif, FFI_DEFAULT_ABI, 3,
    65  		     &ffi_type_double, args) == FFI_OK);
    66  
    67    floating_2 (ld, d, f);
    68  
    69    ffi_call(&cif, FFI_FN(floating_2), &rd, values);
    70  
    71    CHECK(fabs(rd - floating_2(ld, d, f)) < DBL_EPSILON);
    72  
    73    exit (0);
    74  }