| 0,0 → 1,256 |
|---|
| #ifndef _IEEE_FP_H_ |
| #define _IEEE_FP_H_ |
| |
| #include "_ansi.h" |
| |
| #include <machine/ieeefp.h> |
| |
| _BEGIN_STD_C |
| |
| /* FIXME FIXME FIXME: |
| 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 _EXFUN(fpgetround,(void)); |
| fp_rnd _EXFUN(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 _EXFUN(fpgetmask,(void)); |
| fp_except _EXFUN(fpsetmask,(fp_except)); |
| fp_except _EXFUN(fpgetsticky,(void)); |
| fp_except _EXFUN(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 _EXFUN(fpgetroundtoi,(void)); |
| fp_rdi _EXFUN(fpsetroundtoi,(fp_rdi)); |
| |
| #undef isnan |
| #undef isinf |
| |
| int _EXFUN(isnan, (double)); |
| int _EXFUN(isinf, (double)); |
| int _EXFUN(finite, (double)); |
| |
| |
| |
| int _EXFUN(isnanf, (float)); |
| int _EXFUN(isinff, (float)); |
| int _EXFUN(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 |
| |
| #ifndef __ieeefp_isnanf |
| #define __ieeefp_isnanf(x) (((*(long *)&(x) & 0x7f800000L)==0x7f800000L) && \ |
| ((*(long *)&(x) & 0x007fffffL)!=0000000000L)) |
| #endif |
| #define isnanf(x) __ieeefp_isnanf(x) |
| |
| #ifndef __ieeefp_isinff |
| #define __ieeefp_isinff(x) (((*(long *)&(x) & 0x7f800000L)==0x7f800000L) && \ |
| ((*(long *)&(x) & 0x007fffffL)==0000000000L)) |
| #endif |
| #define isinff(x) __ieeefp_isinff(x) |
| |
| #ifndef __ieeefp_finitef |
| #define __ieeefp_finitef(x) (((*(long *)&(x) & 0x7f800000L)!=0x7f800000L)) |
| #endif |
| #define finitef(x) __ieeefp_finitef(x) |
| |
| #ifdef _DOUBLE_IS_32BITS |
| #undef __IEEE_DBL_EXPBIAS |
| #define __IEEE_DBL_EXPBIAS __IEEE_FLT_EXPBIAS |
| |
| #undef __IEEE_DBL_EXPLEN |
| #define __IEEE_DBL_EXPLEN __IEEE_FLT_EXPLEN |
| |
| #undef __IEEE_DBL_FRACLEN |
| #define __IEEE_DBL_FRACLEN __IEEE_FLT_FRACLEN |
| |
| #undef __IEEE_DBL_MAXPOWTWO |
| #define __IEEE_DBL_MAXPOWTWO __IEEE_FLT_MAXPOWTWO |
| |
| #undef __IEEE_DBL_NAN_EXP |
| #define __IEEE_DBL_NAN_EXP __IEEE_FLT_NAN_EXP |
| |
| #undef __ieee_double_shape_type |
| #define __ieee_double_shape_type __ieee_float_shape_type |
| |
| #endif /* _DOUBLE_IS_32BITS */ |
| |
| _END_STD_C |
| |
| #endif /* _IEEE_FP_H_ */ |