rtl_cpp.c

来自「rtlinux3.0 的源代码」· C语言 代码 · 共 71 行

/*
 * RTLinux C++ support
 * Written by Michael Barabanov, [e-mail]
 * (C) 2000 FSMLabs, GPL
 *
 * Parts of this code are based on glibc, copyright FSF Inc
 */
#include <rtl_printf.h>
#include <linux/config.h>
#include <linux/kernel.h>
#include <linux/module.h>

void __pure_virtual (void)
{
	rtl_printf("__pure_virtual called\n");
}

void __this_fixmap_does_not_exist(void)
{
	rtl_printf("__this_fixmap_does_not_exist called\n");
}

/* the following is from glibc, Copyright FSF Inc */
void
__assert_fail (const char *assertion, const char *file, unsigned int line,
		const char *function)
{
	/* Print the message.  */
	(void) rtl_printf ("%s:%u: %s%sAssertion `%s' failed.\n",
			file, line,
			function ? function : "", function ? ": " : "",
			assertion);
}

#ifdef __i386__

typedef unsigned long u_int32_t;
typedef long int32_t;

typedef union
{
	double value;
	struct
	{
		u_int32_t lsw;
		u_int32_t msw;
	} parts;
} ieee_double_shape_type;

#endif

#define EXTRACT_WORDS(ix0,ix1,d)                                \
do {                                                            \
	ieee_double_shape_type ew_u;                                  \
		ew_u.value = (d);                                             \
		(ix0) = ew_u.parts.msw;                                       \
		(ix1) = ew_u.parts.lsw;                                       \
} while (0)


int __isnan(double x)
{
	int32_t hx,lx;
	EXTRACT_WORDS(hx,lx,x);
	hx &= 0x7fffffff;
	hx |= (u_int32_t)(lx|(-lx))>>31;
	hx = 0x7ff00000 - hx;
	return (int)((u_int32_t)(hx))>>31;
}