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NetBSD/lib/libc/gen/nanf_ieee754.c

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Rename ieee754_function.c to function_ieee754.c, following the convention used in exec_format.c, loadfile_format.c, subsys_machdep.c etc. Per discussion with Christos.
2003-05-12 19:15:11 +04:00
/* $NetBSD: nanf_ieee754.c,v 1.1 2003/05/12 15:15:16 kleink Exp $ */
Clean up some rampant code duplication wrt ieee number handling: - Add alignment-safe double and float unions. - Use the above for the __infinity and __nan constants on all architectures that use the standard ieee754 representation of those constants. - Add a single copy of various ieee754 math functions (frexp, isinf, isnan, ldexp and modf) that had numerous duplicates among the arch-specific directories. - Use the above functions on all architectures where the generic C versions where used. Architectures that had local assembly routines are untouched (for those functions only).
2002-02-19 16:08:12 +03:00
#include <sys/cdefs.h>
#if defined(LIBC_SCCS) && !defined(lint)
Rename ieee754_function.c to function_ieee754.c, following the convention used in exec_format.c, loadfile_format.c, subsys_machdep.c etc. Per discussion with Christos.
2003-05-12 19:15:11 +04:00
__RCSID("$NetBSD: nanf_ieee754.c,v 1.1 2003/05/12 15:15:16 kleink Exp $");
Clean up some rampant code duplication wrt ieee number handling: - Add alignment-safe double and float unions. - Use the above for the __infinity and __nan constants on all architectures that use the standard ieee754 representation of those constants. - Add a single copy of various ieee754 math functions (frexp, isinf, isnan, ldexp and modf) that had numerous duplicates among the arch-specific directories. - Use the above functions on all architectures where the generic C versions where used. Architectures that had local assembly routines are untouched (for those functions only).
2002-02-19 16:08:12 +03:00
#endif /* LIBC_SCCS and not lint */
#include <math.h>
#include <machine/endian.h>
/* bytes for quiet NaN (IEEE single precision) */
const union __float_u __nanf =
#if BYTE_ORDER == BIG_ENDIAN
{ { 0x7f, 0xc0, 0, 0 } };
#else
{ { 0, 0, 0xc0, 0x7f } };
#endif
const union __float_u __nanf2 = {{ 0, 0, 0, 0}};