freebsd-skq/lib/libc/ia64/arith.h

/*
 * MD header for contrib/gdtoa
 *
 * $FreeBSD$
 */

/*
 * NOTE: The definitions in this file must be correct or strtod(3) and
 * floating point formats in printf(3) will break!  The file can be
 * generated by running contrib/gdtoa/arithchk.c on the target
 * architecture.  See contrib/gdtoa/gdtoaimp.h for details.
 */

#include <machine/endian.h>

#if _BYTE_ORDER == _LITTLE_ENDIAN

#define IEEE_8087
#define Arith_Kind_ASL 1
#define Long int
#define Intcast (int)(long)
#define Double_Align
#define X64_bit_pointers

#else /* _BYTE_ORDER == _LITTLE_ENDIAN */

#define IEEE_MC68k
#define Arith_Kind_ASL 2
#define Long int
#define Intcast (int)(long)
#define Double_Align
#define X64_bit_pointers
#ifdef gcc_bug	/* XXX Why does arithchk report sudden underflow here? */
#define Sudden_Underflow
#endif

#endif
Replace our ancient dtoa/strtod implementation with the gdtoa package, a more recent, generalized set of routines. Among the changes: - Declare strtof() and strtold() in stdlib.h. - Add glue to libc to support these routines for all kinds of ``long double''. - Update printf() to reflect the fact that dtoa works slightly differently now. As soon as I see that nothing has blown up, I will kill src/lib/libc/stdlib/strtod.c. Soon printf() will be able to use the new routines to output long doubles without loss of precision, but numerous bugs in the existing code must be addressed first. Reviewed by: bde (briefly), mike (mentor), obrien 2003-03-12 20:30:00 +00:00			`/*`
			`* MD header for contrib/gdtoa`
			`*`
			`* $FreeBSD$`
			`*/`

Add a comment describing why it's important for the values in this file to be correct, and how to generate them automatically. Caused much pain and suffering for: peter 2003-05-08 13:50:44 +00:00			`/*`
			`* NOTE: The definitions in this file must be correct or strtod(3) and`
			`* floating point formats in printf(3) will break! The file can be`
			`* generated by running contrib/gdtoa/arithchk.c on the target`
			`* architecture. See contrib/gdtoa/gdtoaimp.h for details.`
			`*/`

Replace our ancient dtoa/strtod implementation with the gdtoa package, a more recent, generalized set of routines. Among the changes: - Declare strtof() and strtold() in stdlib.h. - Add glue to libc to support these routines for all kinds of ``long double''. - Update printf() to reflect the fact that dtoa works slightly differently now. As soon as I see that nothing has blown up, I will kill src/lib/libc/stdlib/strtod.c. Soon printf() will be able to use the new routines to output long doubles without loss of precision, but numerous bugs in the existing code must be addressed first. Reviewed by: bde (briefly), mike (mentor), obrien 2003-03-12 20:30:00 +00:00			`#include <machine/endian.h>`

			`#if _BYTE_ORDER == _LITTLE_ENDIAN`

			`#define IEEE_8087`
			`#define Arith_Kind_ASL 1`
			`#define Long int`
			`#define Intcast (int)(long)`
			`#define Double_Align`
			`#define X64_bit_pointers`

			`#else /* _BYTE_ORDER == _LITTLE_ENDIAN */`

			`#define IEEE_MC68k`
			`#define Arith_Kind_ASL 2`
			`#define Long int`
			`#define Intcast (int)(long)`
			`#define Double_Align`
			`#define X64_bit_pointers`
			`#ifdef gcc_bug /* XXX Why does arithchk report sudden underflow here? */`
			`#define Sudden_Underflow`
			`#endif`

			`#endif`