40 lines
1.1 KiB
C
40 lines
1.1 KiB
C
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/* $NetBSD: infinityl_ieee754.c,v 1.1 2011/01/17 23:53:03 matt Exp $ */
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/*
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* IEEE-compatible infinityl.c for 64-bit or 128-bit long double format.
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* This is public domain.
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*/
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#include <sys/cdefs.h>
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#if defined(LIBC_SCCS) && !defined(lint)
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__RCSID("$NetBSD: infinityl_ieee754.c,v 1.1 2011/01/17 23:53:03 matt Exp $");
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#endif /* LIBC_SCCS and not lint */
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#include <math.h>
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#include <machine/endian.h>
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#include <machine/ieee.h>
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#ifdef __HAVE_LONG_DOUBLE
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#define LDBL_EXPBITS EXT_EXPBITS
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#define LDBL_EXP_INFNAN EXT_EXP_INFNAN
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#else
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#define LDBL_EXPBITS DBL_EXPBITS
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#define LDBL_EXP_INFNAN DBL_EXP_INFNAN
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#endif
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#define EXP_INFNAN (LDBL_EXP_INFNAN << (31 - LDBL_EXPBITS))
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const union __long_double_u __infinityl = { {
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#if BYTE_ORDER == BIG_ENDIAN
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[0] = (EXP_INFNAN >> 24) & 0x7f,
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[1] = (EXP_INFNAN >> 16) & 0xff,
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[2] = (EXP_INFNAN >> 8) & 0xff,
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[3] = (EXP_INFNAN >> 0) & 0xff,
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#else
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[sizeof(long double)-4] = (EXP_INFNAN >> 0) & 0xff,
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[sizeof(long double)-3] = (EXP_INFNAN >> 8) & 0xff,
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[sizeof(long double)-2] = (EXP_INFNAN >> 16) & 0xff,
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[sizeof(long double)-1] = (EXP_INFNAN >> 24) & 0x7f,
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#endif
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} };
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