Python code coverage for Modules/_ctypes/libffi/testsuite/libffi.call/float4.c

#	count	content
1	n/a	/* Area: ffi_call
2	n/a	Purpose: Check denorm double value.
3	n/a	Limitations: none.
4	n/a	PR: PR26483.
5	n/a	Originator: From the original ffitest.c */
6	n/a
7	n/a	/* { dg-do run } */
8	n/a	/* { dg-options "-mieee" { target alpha--* } } */
9	n/a
10	n/a	#include "ffitest.h"
11	n/a	#include "float.h"
12	n/a
13	n/a	typedef union
14	n/a	{
15	n/a	double d;
16	n/a	unsigned char c[sizeof (double)];
17	n/a	} value_type;
18	n/a
19	n/a	#define CANARY 0xba
20	n/a
21	n/a	static double dblit(double d)
22	n/a	{
23	n/a	return d;
24	n/a	}
25	n/a
26	n/a	int main (void)
27	n/a	{
28	n/a	ffi_cif cif;
29	n/a	ffi_type *args[MAX_ARGS];
30	n/a	void *values[MAX_ARGS];
31	n/a	double d;
32	n/a	value_type result[2];
33	n/a	unsigned int i;
34	n/a
35	n/a	args[0] = &ffi_type_double;
36	n/a	values[0] = &d;
37	n/a
38	n/a	/* Initialize the cif */
39	n/a	CHECK(ffi_prep_cif(&cif, FFI_DEFAULT_ABI, 1,
40	n/a	&ffi_type_double, args) == FFI_OK);
41	n/a
42	n/a	d = DBL_MIN / 2;
43	n/a
44	n/a	/* Put a canary in the return array. This is a regression test for
45	n/a	a buffer overrun. */
46	n/a	memset(result[1].c, CANARY, sizeof (double));
47	n/a
48	n/a	ffi_call(&cif, FFI_FN(dblit), &result[0].d, values);
49	n/a
50	n/a	/* The standard delta check doesn't work for denorms. Since we didn't do
51	n/a	any arithmetic, we should get the original result back, and hence an
52	n/a	exact check should be OK here. */
53	n/a
54	n/a	CHECK(result[0].d == dblit(d));
55	n/a
56	n/a	/* Check the canary. */
57	n/a	for (i = 0; i < sizeof (double); ++i)
58	n/a	CHECK(result[1].c[i] == CANARY);
59	n/a
60	n/a	exit(0);
61	n/a
62	n/a	}