diff -r 000000000000 -r e4d67989cc36 genericopenlibs/cstdlib/LINC/IEEEFP.H --- /dev/null Thu Jan 01 00:00:00 1970 +0000 +++ b/genericopenlibs/cstdlib/LINC/IEEEFP.H Tue Feb 02 02:01:42 2010 +0200 @@ -0,0 +1,237 @@ +/* +* Copyright (c) 1997-2009 Nokia Corporation and/or its subsidiary(-ies). +* All rights reserved. +* This component and the accompanying materials are made available +* under the terms of "Eclipse Public License v1.0" +* which accompanies this distribution, and is available +* at the URL "http://www.eclipse.org/legal/epl-v10.html". +* +* Initial Contributors: +* Nokia Corporation - initial contribution. +* +* Contributors: +* +* Description: +* +*/ + + + +/** + @file + @publishedAll + @released +*/ + +#ifndef _IEEE_FP_H_ +#define _IEEE_FP_H_ + +#include "_ansi.h" + +#include + +/* FIX THIS FIX THIS FIX THIS: + Neither of __ieee_{float,double}_shape_tape seem to be used anywhere + except in libm/test. If that is the case, please delete these from here. + If that is not the case, please insert documentation here describing why + they're needed. */ + +#ifdef __IEEE_BIG_ENDIAN + +typedef union +{ + double value; + struct + { + unsigned int sign : 1; + unsigned int exponent: 11; + unsigned int fraction0:4; + unsigned int fraction1:16; + unsigned int fraction2:16; + unsigned int fraction3:16; + + } number; + struct + { + unsigned int sign : 1; + unsigned int exponent: 11; + unsigned int quiet:1; + unsigned int function0:3; + unsigned int function1:16; + unsigned int function2:16; + unsigned int function3:16; + } nan; + struct + { + unsigned long msw; + unsigned long lsw; + } parts; + long aslong[2]; +} __ieee_double_shape_type; + +#endif + +#ifdef __IEEE_LITTLE_ENDIAN + +typedef union +{ + double value; + struct + { +#ifdef __SMALL_BITFIELDS + unsigned int fraction3:16; + unsigned int fraction2:16; + unsigned int fraction1:16; + unsigned int fraction0: 4; +#else + unsigned int fraction1:32; + unsigned int fraction0:20; +#endif + unsigned int exponent :11; + unsigned int sign : 1; + } number; + struct + { +#ifdef __SMALL_BITFIELDS + unsigned int function3:16; + unsigned int function2:16; + unsigned int function1:16; + unsigned int function0:3; +#else + unsigned int function1:32; + unsigned int function0:19; +#endif + unsigned int quiet:1; + unsigned int exponent: 11; + unsigned int sign : 1; + } nan; + struct + { + unsigned long lsw; + unsigned long msw; + } parts; + + long aslong[2]; + +} __ieee_double_shape_type; + +#endif + +#ifdef __IEEE_BIG_ENDIAN + +typedef union +{ + float value; + struct + { + unsigned int sign : 1; + unsigned int exponent: 8; + unsigned int fraction0: 7; + unsigned int fraction1: 16; + } number; + struct + { + unsigned int sign:1; + unsigned int exponent:8; + unsigned int quiet:1; + unsigned int function0:6; + unsigned int function1:16; + } nan; + long p1; + +} __ieee_float_shape_type; + +#endif + +#ifdef __IEEE_LITTLE_ENDIAN + +typedef union +{ + float value; + struct + { + unsigned int fraction0: 7; + unsigned int fraction1: 16; + unsigned int exponent: 8; + unsigned int sign : 1; + } number; + struct + { + unsigned int function1:16; + unsigned int function0:6; + unsigned int quiet:1; + unsigned int exponent:8; + unsigned int sign:1; + } nan; + long p1; + +} __ieee_float_shape_type; + +#endif + + +/** +FLOATING ROUNDING +*/ +typedef int fp_rnd; + +#define FP_RN 0 /* Round to nearest */ +#define FP_RM 1 /* Round down */ +#define FP_RP 2 /* Round up */ +#define FP_RZ 3 /* Round to zero (trunate) */ + +fp_rnd fpgetround(void); +fp_rnd fpsetround(fp_rnd); + +/** +EXCEPTIONS +*/ +typedef int fp_except; + +#define FP_X_INV 0x10 /* Invalid operation */ +#define FP_X_DX 0x80 /* Divide by zero */ +#define FP_X_OFL 0x04 /* Overflow exception */ +#define FP_X_UFL 0x02 /* Underflow exception */ +#define FP_X_IMP 0x01 /* imprecise exception */ + +fp_except fpgetmask(void); +fp_except fpsetmask(fp_except); +fp_except fpgetsticky(void); +fp_except fpsetsticky(fp_except); + +/** +INTEGER ROUNDING +*/ +typedef int fp_rdi; +#define FP_RDI_TOZ 0 /* Round to Zero */ +#define FP_RDI_RD 1 /* Follow float mode */ + +fp_rdi fpgetroundtoi(void); +fp_rdi fpsetroundtoi(fp_rdi); + +int isnan(double); +int isinf(double); +int finite(double); + +int isnanf(float); +int isinff(float); +int finitef(float); + +#define __IEEE_DBL_EXPBIAS 1023 +#define __IEEE_FLT_EXPBIAS 127 +#define __IEEE_DBL_EXPLEN 11 +#define __IEEE_FLT_EXPLEN 8 +#define __IEEE_DBL_FRACLEN (64 - (__IEEE_DBL_EXPLEN + 1)) +#define __IEEE_FLT_FRACLEN (32 - (__IEEE_FLT_EXPLEN + 1)) +#define __IEEE_DBL_MAXPOWTWO ((double)(1L << 32 - 2) * (1L << (32-11) - 32 + 1)) +#define __IEEE_FLT_MAXPOWTWO ((float)(1L << (32-8) - 1)) +#define __IEEE_DBL_NAN_EXP 0x7ff +#define __IEEE_FLT_NAN_EXP 0xff + +#define isnanf(x) (((*(long *)&(x) & 0x7f800000L)==0x7f800000L) && \ + ((*(long *)&(x) & 0x007fffffL)!=0000000000L)) +#define isinff(x) (((*(long *)&(x) & 0x7f800000L)==0x7f800000L) && \ + ((*(long *)&(x) & 0x007fffffL)==0000000000L)) +#define finitef(x) (((*(long *)&(x) & 0x7f800000L)!=0x7f800000L)) + +#endif /* _IEEE_FP_H_ */