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lxdream.org :: lxdream/test/include/ieeefp.h
lxdream 0.9.1
released Jun 29
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filename test/include/ieeefp.h
changeset 185:6755a04c447f
author nkeynes
date Tue Feb 13 08:34:27 2007 +0000 (14 years ago)
permissions -rw-r--r--
last change Add tests for FLOAT and FTRC
Comment out user-mode exception test (broken)
view annotate diff log raw
     1 #ifndef _IEEE_FP_H_
     2 #define _IEEE_FP_H_
     4 #include "_ansi.h"
     6 #include <machine/ieeefp.h>
     8 /* FIXME FIXME FIXME:
     9    Neither of __ieee_{float,double}_shape_tape seem to be used anywhere
    10    except in libm/test.  If that is the case, please delete these from here.
    11    If that is not the case, please insert documentation here describing why
    12    they're needed.  */
    14 #ifdef __IEEE_BIG_ENDIAN
    16 typedef union 
    17 {
    18   double value;
    19   struct 
    20   {
    21     unsigned int sign : 1;
    22     unsigned int exponent: 11;
    23     unsigned int fraction0:4;
    24     unsigned int fraction1:16;
    25     unsigned int fraction2:16;
    26     unsigned int fraction3:16;
    28   } number;
    29   struct 
    30   {
    31     unsigned int sign : 1;
    32     unsigned int exponent: 11;
    33     unsigned int quiet:1;
    34     unsigned int function0:3;
    35     unsigned int function1:16;
    36     unsigned int function2:16;
    37     unsigned int function3:16;
    38   } nan;
    39   struct 
    40   {
    41     unsigned long msw;
    42     unsigned long lsw;
    43   } parts;
    44     long aslong[2];
    45 } __ieee_double_shape_type;
    47 #endif
    49 #ifdef __IEEE_LITTLE_ENDIAN
    51 typedef union 
    52 {
    53   double value;
    54   struct 
    55   {
    56 #ifdef __SMALL_BITFIELDS
    57     unsigned int fraction3:16;
    58     unsigned int fraction2:16;
    59     unsigned int fraction1:16;
    60     unsigned int fraction0: 4;
    61 #else
    62     unsigned int fraction1:32;
    63     unsigned int fraction0:20;
    64 #endif
    65     unsigned int exponent :11;
    66     unsigned int sign     : 1;
    67   } number;
    68   struct 
    69   {
    70 #ifdef __SMALL_BITFIELDS
    71     unsigned int function3:16;
    72     unsigned int function2:16;
    73     unsigned int function1:16;
    74     unsigned int function0:3;
    75 #else
    76     unsigned int function1:32;
    77     unsigned int function0:19;
    78 #endif
    79     unsigned int quiet:1;
    80     unsigned int exponent: 11;
    81     unsigned int sign : 1;
    82   } nan;
    83   struct 
    84   {
    85     unsigned long lsw;
    86     unsigned long msw;
    87   } parts;
    89   long aslong[2];
    91 } __ieee_double_shape_type;
    93 #endif
    95 #ifdef __IEEE_BIG_ENDIAN
    97 typedef union
    98 {
    99   float value;
   100   struct 
   101   {
   102     unsigned int sign : 1;
   103     unsigned int exponent: 8;
   104     unsigned int fraction0: 7;
   105     unsigned int fraction1: 16;
   106   } number;
   107   struct 
   108   {
   109     unsigned int sign:1;
   110     unsigned int exponent:8;
   111     unsigned int quiet:1;
   112     unsigned int function0:6;
   113     unsigned int function1:16;
   114   } nan;
   115   long p1;
   117 } __ieee_float_shape_type;
   119 #endif
   121 #ifdef __IEEE_LITTLE_ENDIAN
   123 typedef union
   124 {
   125   float value;
   126   struct 
   127   {
   128     unsigned int fraction0: 7;
   129     unsigned int fraction1: 16;
   130     unsigned int exponent: 8;
   131     unsigned int sign : 1;
   132   } number;
   133   struct 
   134   {
   135     unsigned int function1:16;
   136     unsigned int function0:6;
   137     unsigned int quiet:1;
   138     unsigned int exponent:8;
   139     unsigned int sign:1;
   140   } nan;
   141   long p1;
   143 } __ieee_float_shape_type;
   145 #endif
   151 /* FLOATING ROUNDING */
   153 typedef int fp_rnd;
   154 #define FP_RN 0 	/* Round to nearest 		*/
   155 #define FP_RM 1		/* Round down 			*/
   156 #define FP_RP 2		/* Round up 			*/
   157 #define FP_RZ 3		/* Round to zero (trunate) 	*/
   159 fp_rnd _EXFUN(fpgetround,(void));
   160 fp_rnd _EXFUN(fpsetround, (fp_rnd));
   162 /* EXCEPTIONS */
   164 typedef int fp_except;
   165 #define FP_X_INV 0x10	/* Invalid operation 		*/
   166 #define FP_X_DX  0x80	/* Divide by zero		*/
   167 #define FP_X_OFL 0x04	/* Overflow exception		*/
   168 #define FP_X_UFL 0x02	/* Underflow exception		*/
   169 #define FP_X_IMP 0x01	/* imprecise exception		*/
   171 fp_except _EXFUN(fpgetmask,(void));
   172 fp_except _EXFUN(fpsetmask,(fp_except));
   173 fp_except _EXFUN(fpgetsticky,(void));
   174 fp_except _EXFUN(fpsetsticky, (fp_except));
   176 /* INTEGER ROUNDING */
   178 typedef int fp_rdi;
   179 #define FP_RDI_TOZ 0	/* Round to Zero 		*/
   180 #define FP_RDI_RD  1	/* Follow float mode		*/
   182 fp_rdi _EXFUN(fpgetroundtoi,(void));
   183 fp_rdi _EXFUN(fpsetroundtoi,(fp_rdi));
   185 int _EXFUN(isnan, (double));
   186 int _EXFUN(isinf, (double));
   187 int _EXFUN(finite, (double));
   191 int _EXFUN(isnanf, (float));
   192 int _EXFUN(isinff, (float));
   193 int _EXFUN(finitef, (float));
   195 #define __IEEE_DBL_EXPBIAS 1023
   196 #define __IEEE_FLT_EXPBIAS 127
   198 #define __IEEE_DBL_EXPLEN 11
   199 #define __IEEE_FLT_EXPLEN 8
   202 #define __IEEE_DBL_FRACLEN (64 - (__IEEE_DBL_EXPLEN + 1))
   203 #define __IEEE_FLT_FRACLEN (32 - (__IEEE_FLT_EXPLEN + 1))
   205 #define __IEEE_DBL_MAXPOWTWO	((double)(1L << 32 - 2) * (1L << (32-11) - 32 + 1))
   206 #define __IEEE_FLT_MAXPOWTWO	((float)(1L << (32-8) - 1))
   208 #define __IEEE_DBL_NAN_EXP 0x7ff
   209 #define __IEEE_FLT_NAN_EXP 0xff
   212 #define isnanf(x) (((*(long *)&(x) & 0x7f800000L)==0x7f800000L) && \
   213 		   ((*(long *)&(x) & 0x007fffffL)!=0000000000L))
   215 #define isinff(x) (((*(long *)&(x) & 0x7f800000L)==0x7f800000L) && \
   216 		   ((*(long *)&(x) & 0x007fffffL)==0000000000L))
   218 #define finitef(x) (((*(long *)&(x) & 0x7f800000L)!=0x7f800000L))
   220 #ifdef _DOUBLE_IS_32BITS
   221 #undef __IEEE_DBL_EXPBIAS
   222 #define __IEEE_DBL_EXPBIAS __IEEE_FLT_EXPBIAS
   224 #undef __IEEE_DBL_EXPLEN
   225 #define __IEEE_DBL_EXPLEN __IEEE_FLT_EXPLEN
   227 #undef __IEEE_DBL_FRACLEN
   228 #define __IEEE_DBL_FRACLEN __IEEE_FLT_FRACLEN
   230 #undef __IEEE_DBL_MAXPOWTWO
   231 #define __IEEE_DBL_MAXPOWTWO __IEEE_FLT_MAXPOWTWO
   233 #undef __IEEE_DBL_NAN_EXP
   234 #define __IEEE_DBL_NAN_EXP __IEEE_FLT_NAN_EXP
   236 #undef __ieee_double_shape_type
   237 #define __ieee_double_shape_type __ieee_float_shape_type
   239 #endif /* _DOUBLE_IS_32BITS */
   241 #endif /* _IEEE_FP_H_ */
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