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256 lines
5.2 KiB
256 lines
5.2 KiB
#ifndef _IEEE_FP_H_ |
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#define _IEEE_FP_H_ |
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#include "_ansi.h" |
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#include <machine/ieeefp.h> |
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_BEGIN_STD_C |
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/* FIXME FIXME FIXME: |
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Neither of __ieee_{float,double}_shape_tape seem to be used anywhere |
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except in libm/test. If that is the case, please delete these from here. |
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If that is not the case, please insert documentation here describing why |
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they're needed. */ |
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#ifdef __IEEE_BIG_ENDIAN |
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typedef union |
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{ |
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double value; |
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struct |
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{ |
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unsigned int sign : 1; |
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unsigned int exponent: 11; |
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unsigned int fraction0:4; |
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unsigned int fraction1:16; |
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unsigned int fraction2:16; |
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unsigned int fraction3:16; |
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} number; |
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struct |
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{ |
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unsigned int sign : 1; |
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unsigned int exponent: 11; |
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unsigned int quiet:1; |
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unsigned int function0:3; |
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unsigned int function1:16; |
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unsigned int function2:16; |
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unsigned int function3:16; |
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} nan; |
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struct |
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{ |
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unsigned long msw; |
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unsigned long lsw; |
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} parts; |
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long aslong[2]; |
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} __ieee_double_shape_type; |
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#endif |
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#ifdef __IEEE_LITTLE_ENDIAN |
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typedef union |
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{ |
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double value; |
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struct |
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{ |
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#ifdef __SMALL_BITFIELDS |
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unsigned int fraction3:16; |
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unsigned int fraction2:16; |
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unsigned int fraction1:16; |
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unsigned int fraction0: 4; |
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#else |
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unsigned int fraction1:32; |
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unsigned int fraction0:20; |
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#endif |
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unsigned int exponent :11; |
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unsigned int sign : 1; |
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} number; |
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struct |
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{ |
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#ifdef __SMALL_BITFIELDS |
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unsigned int function3:16; |
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unsigned int function2:16; |
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unsigned int function1:16; |
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unsigned int function0:3; |
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#else |
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unsigned int function1:32; |
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unsigned int function0:19; |
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#endif |
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unsigned int quiet:1; |
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unsigned int exponent: 11; |
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unsigned int sign : 1; |
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} nan; |
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struct |
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{ |
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unsigned long lsw; |
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unsigned long msw; |
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} parts; |
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long aslong[2]; |
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} __ieee_double_shape_type; |
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#endif |
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#ifdef __IEEE_BIG_ENDIAN |
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typedef union |
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{ |
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float value; |
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struct |
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{ |
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unsigned int sign : 1; |
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unsigned int exponent: 8; |
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unsigned int fraction0: 7; |
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unsigned int fraction1: 16; |
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} number; |
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struct |
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{ |
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unsigned int sign:1; |
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unsigned int exponent:8; |
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unsigned int quiet:1; |
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unsigned int function0:6; |
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unsigned int function1:16; |
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} nan; |
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long p1; |
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} __ieee_float_shape_type; |
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#endif |
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#ifdef __IEEE_LITTLE_ENDIAN |
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typedef union |
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{ |
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float value; |
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struct |
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{ |
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unsigned int fraction0: 7; |
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unsigned int fraction1: 16; |
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unsigned int exponent: 8; |
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unsigned int sign : 1; |
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} number; |
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struct |
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{ |
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unsigned int function1:16; |
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unsigned int function0:6; |
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unsigned int quiet:1; |
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unsigned int exponent:8; |
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unsigned int sign:1; |
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} nan; |
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long p1; |
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} __ieee_float_shape_type; |
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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 (trunate) */ |
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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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#undef isnan |
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#undef isinf |
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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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#ifndef __ieeefp_isnanf |
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#define __ieeefp_isnanf(x) (((*(long *)&(x) & 0x7f800000L)==0x7f800000L) && \ |
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((*(long *)&(x) & 0x007fffffL)!=0000000000L)) |
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#endif |
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#define isnanf(x) __ieeefp_isnanf(x) |
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#ifndef __ieeefp_isinff |
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#define __ieeefp_isinff(x) (((*(long *)&(x) & 0x7f800000L)==0x7f800000L) && \ |
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((*(long *)&(x) & 0x007fffffL)==0000000000L)) |
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#endif |
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#define isinff(x) __ieeefp_isinff(x) |
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#ifndef __ieeefp_finitef |
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#define __ieeefp_finitef(x) (((*(long *)&(x) & 0x7f800000L)!=0x7f800000L)) |
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#endif |
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#define finitef(x) __ieeefp_finitef(x) |
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#ifdef _DOUBLE_IS_32BITS |
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#undef __IEEE_DBL_EXPBIAS |
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#define __IEEE_DBL_EXPBIAS __IEEE_FLT_EXPBIAS |
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#undef __IEEE_DBL_EXPLEN |
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#define __IEEE_DBL_EXPLEN __IEEE_FLT_EXPLEN |
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#undef __IEEE_DBL_FRACLEN |
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#define __IEEE_DBL_FRACLEN __IEEE_FLT_FRACLEN |
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#undef __IEEE_DBL_MAXPOWTWO |
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#define __IEEE_DBL_MAXPOWTWO __IEEE_FLT_MAXPOWTWO |
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#undef __IEEE_DBL_NAN_EXP |
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#define __IEEE_DBL_NAN_EXP __IEEE_FLT_NAN_EXP |
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#undef __ieee_double_shape_type |
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#define __ieee_double_shape_type __ieee_float_shape_type |
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#endif /* _DOUBLE_IS_32BITS */ |
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_END_STD_C |
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#endif /* _IEEE_FP_H_ */
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