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https://github.com/KolibriOS/kolibrios.git
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89 lines
2.2 KiB
C
89 lines
2.2 KiB
C
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/* Copyright (C) 1998 DJ Delorie, see COPYING.DJ for details */
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#ifndef __dj_include_ieeefp_h_
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#define __dj_include_ieeefp_h_
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#ifdef __cplusplus
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extern "C" {
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#endif
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#include <sys/cdefs.h>
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/* #include <machine/ieeefp.h> */
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#include <machine/endian.h>
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#if BYTE_ORDER == LITTLE_ENDIAN
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# define __IEEE_LITTLE_ENDIAN
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#endif
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/* FLOATING ROUNDING */
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typedef int fp_rnd;
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#define FP_RN 0 /* Round to nearest */
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#define FP_RM 1 /* Round down */
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#define FP_RP 2 /* Round up */
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#define FP_RZ 3 /* Round to zero (truncate) */
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fp_rnd _EXFUN(fpgetround,(void));
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fp_rnd _EXFUN(fpsetround, (fp_rnd));
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/* EXCEPTIONS */
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typedef int fp_except;
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#define FP_X_INV 0x10 /* Invalid operation */
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#define FP_X_DX 0x80 /* Divide by zero */
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#define FP_X_OFL 0x04 /* Overflow exception */
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#define FP_X_UFL 0x02 /* Underflow exception */
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#define FP_X_IMP 0x01 /* Imprecise exception */
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fp_except _EXFUN(fpgetmask,(void));
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fp_except _EXFUN(fpsetmask,(fp_except));
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fp_except _EXFUN(fpgetsticky,(void));
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fp_except _EXFUN(fpsetsticky, (fp_except));
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/* INTEGER ROUNDING */
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typedef int fp_rdi;
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#define FP_RDI_TOZ 0 /* Round to Zero */
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#define FP_RDI_RD 1 /* Follow float mode */
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fp_rdi _EXFUN(fpgetroundtoi,(void));
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fp_rdi _EXFUN(fpsetroundtoi,(fp_rdi));
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int _EXFUN(isnan, (double));
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int _EXFUN(isinf, (double));
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int _EXFUN(finite, (double));
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int _EXFUN(isnanf, (float));
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int _EXFUN(isinff, (float));
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int _EXFUN(finitef, (float));
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#define __IEEE_DBL_EXPBIAS 1023
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#define __IEEE_FLT_EXPBIAS 127
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#define __IEEE_DBL_EXPLEN 11
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#define __IEEE_FLT_EXPLEN 8
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#define __IEEE_DBL_FRACLEN (64 - (__IEEE_DBL_EXPLEN + 1))
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#define __IEEE_FLT_FRACLEN (32 - (__IEEE_FLT_EXPLEN + 1))
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#define __IEEE_DBL_MAXPOWTWO ((double)(1L << 32 - 2) * (1L << (32-11) - 32 + 1))
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#define __IEEE_FLT_MAXPOWTWO ((float)(1L << (32-8) - 1))
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#define __IEEE_DBL_NAN_EXP 0x7ff
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#define __IEEE_FLT_NAN_EXP 0xff
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#define isnanf(x) (((*(long *)&(x) & 0x7f800000L)==0x7f800000L) && \
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((*(long *)&(x) & 0x007fffffL)!=0000000000L))
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#define isinff(x) (((*(long *)&(x) & 0x7f800000L)==0x7f800000L) && \
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((*(long *)&(x) & 0x007fffffL)==0000000000L))
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#define finitef(x) (((*(long *)&(x) & 0x7f800000L)!=0x7f800000L))
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#ifdef __cplusplus
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}
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#endif
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#endif /* __dj_include_ieeefp_h_ */
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