-/* This is a software floating point library which can be used instead of
- the floating point routines in libgcc1.c for targets without hardware
- floating point. */
-
-/* Copyright (C) 1994, 1995 Free Software Foundation, Inc.
+/* This is a software floating point library which can be used
+ for targets without hardware floating point.
+ Copyright (C) 1994, 1995, 1996, 1997, 1998, 2000, 2001
+ Free Software Foundation, Inc.
This file is free software; you can redistribute it and/or modify it
under the terms of the GNU General Public License as published by the
/* The intended way to use this file is to make two copies, add `#define FLOAT'
to one copy, then compile both copies and add them to libgcc.a. */
+#include "tconfig.h"
+#include "fp-bit.h"
+
/* The following macros can be defined to change the behaviour of this file:
FLOAT: Implement a `float', aka SFmode, fp library. If this is not
defined, then this file implements a `double', aka DFmode, fp library.
CMPtype: Specify the type that floating point compares should return.
This defaults to SItype, aka int.
US_SOFTWARE_GOFAST: This makes all entry points use the same names as the
- US Software goFast library. If this is not defined, the entry points use
- the same names as libgcc1.c.
+ US Software goFast library.
_DEBUG_BITFLOAT: This makes debugging the code a little easier, by adding
- two integers to the FLO_union_type.
+ two integers to the FLO_union_type.
+ NO_DENORMALS: Disable handling of denormals.
NO_NANS: Disable nan and infinity handling
SMALL_MACHINE: Useful when operations on QIs and HIs are faster
than on an SI */
-typedef SFtype __attribute__ ((mode (SF)));
-typedef DFtype __attribute__ ((mode (DF)));
-
-typedef int HItype __attribute__ ((mode (HI)));
-typedef int SItype __attribute__ ((mode (SI)));
-typedef int DItype __attribute__ ((mode (DI)));
-
-/* The type of the result of a fp compare */
-#ifndef CMPtype
-#define CMPtype SItype
-#endif
-
-typedef unsigned int UHItype __attribute__ ((mode (HI)));
-typedef unsigned int USItype __attribute__ ((mode (SI)));
-typedef unsigned int UDItype __attribute__ ((mode (DI)));
-
-#define MAX_SI_INT ((SItype) ((unsigned) (~0)>>1))
-#define MAX_USI_INT ((USItype) ~0)
-
-
-#ifdef FLOAT_ONLY
-#define NO_DI_MODE
-#endif
-
-#ifdef FLOAT
-# define NGARDS 7L
-# define GARDROUND 0x3f
-# define GARDMASK 0x7f
-# define GARDMSB 0x40
-# define EXPBITS 8
-# define EXPBIAS 127
-# define FRACBITS 23
-# define EXPMAX (0xff)
-# define QUIET_NAN 0x100000L
-# define FRAC_NBITS 32
-# define FRACHIGH 0x80000000L
-# define FRACHIGH2 0xc0000000L
-# define pack_d pack_f
-# define unpack_d unpack_f
- typedef USItype fractype;
- typedef UHItype halffractype;
- typedef SFtype FLO_type;
- typedef SItype intfrac;
-
-#else
-# define PREFIXFPDP dp
-# define PREFIXSFDF df
-# define NGARDS 8L
-# define GARDROUND 0x7f
-# define GARDMASK 0xff
-# define GARDMSB 0x80
-# define EXPBITS 11
-# define EXPBIAS 1023
-# define FRACBITS 52
-# define EXPMAX (0x7ff)
-# define QUIET_NAN 0x8000000000000LL
-# define FRAC_NBITS 64
-# define FRACHIGH 0x8000000000000000LL
-# define FRACHIGH2 0xc000000000000000LL
- typedef UDItype fractype;
- typedef USItype halffractype;
- typedef DFtype FLO_type;
- typedef DItype intfrac;
-#endif
-
-#ifdef US_SOFTWARE_GOFAST
-# ifdef FLOAT
-# define add fpadd
-# define sub fpsub
-# define multiply fpmul
-# define divide fpdiv
-# define compare fpcmp
-# define si_to_float sitofp
-# define float_to_si fptosi
-# define float_to_usi fptoui
-# define negate __negsf2
-# define sf_to_df fptodp
-# define dptofp dptofp
-#else
-# define add dpadd
-# define sub dpsub
-# define multiply dpmul
-# define divide dpdiv
-# define compare dpcmp
-# define si_to_float litodp
-# define float_to_si dptoli
-# define float_to_usi dptoul
-# define negate __negdf2
-# define df_to_sf dptofp
-#endif
-#else
-# ifdef FLOAT
-# define add __addsf3
-# define sub __subsf3
-# define multiply __mulsf3
-# define divide __divsf3
-# define compare __cmpsf2
-# define _eq_f2 __eqsf2
-# define _ne_f2 __nesf2
-# define _gt_f2 __gtsf2
-# define _ge_f2 __gesf2
-# define _lt_f2 __ltsf2
-# define _le_f2 __lesf2
-# define si_to_float __floatsisf
-# define float_to_si __fixsfsi
-# define float_to_usi __fixunssfsi
-# define negate __negsf2
-# define sf_to_df __extendsfdf2
-#else
-# define add __adddf3
-# define sub __subdf3
-# define multiply __muldf3
-# define divide __divdf3
-# define compare __cmpdf2
-# define _eq_f2 __eqdf2
-# define _ne_f2 __nedf2
-# define _gt_f2 __gtdf2
-# define _ge_f2 __gedf2
-# define _lt_f2 __ltdf2
-# define _le_f2 __ledf2
-# define si_to_float __floatsidf
-# define float_to_si __fixdfsi
-# define float_to_usi __fixunsdfsi
-# define negate __negdf2
-# define df_to_sf __truncdfsf2
-# endif
-#endif
-
-
-#define INLINE __inline__
-
-/* Preserve the sticky-bit when shifting fractions to the right. */
-#define LSHIFT(a) { a = (a & 1) | (a >> 1); }
-
-/* numeric parameters */
-/* F_D_BITOFF is the number of bits offset between the MSB of the mantissa
- of a float and of a double. Assumes there are only two float types.
- (double::FRAC_BITS+double::NGARGS-(float::FRAC_BITS-float::NGARDS))
- */
-#define F_D_BITOFF (52+8-(23+7))
-
-
-#define NORMAL_EXPMIN (-(EXPBIAS)+1)
-#define IMPLICIT_1 (1LL<<(FRACBITS+NGARDS))
-#define IMPLICIT_2 (1LL<<(FRACBITS+1+NGARDS))
-
-/* common types */
-
-typedef enum
-{
- CLASS_SNAN,
- CLASS_QNAN,
- CLASS_ZERO,
- CLASS_NUMBER,
- CLASS_INFINITY
-} fp_class_type;
-
-typedef struct
-{
-#ifdef SMALL_MACHINE
- char class;
- unsigned char sign;
- short normal_exp;
-#else
- fp_class_type class;
- unsigned int sign;
- int normal_exp;
-#endif
-
- union
- {
- fractype ll;
- halffractype l[2];
- } fraction;
-} fp_number_type;
-
-typedef union
-{
- FLO_type value;
- fractype value_raw;
-
-#ifndef FLOAT
- halffractype words[2];
-#endif
-
-#ifdef FLOAT_BIT_ORDER_MISMATCH
- struct
- {
- fractype fraction:FRACBITS __attribute__ ((packed));
- unsigned int exp:EXPBITS __attribute__ ((packed));
- unsigned int sign:1 __attribute__ ((packed));
- }
- bits;
-#endif
-
-#ifdef _DEBUG_BITFLOAT
- struct
- {
- unsigned int sign:1 __attribute__ ((packed));
- unsigned int exp:EXPBITS __attribute__ ((packed));
- fractype fraction:FRACBITS __attribute__ ((packed));
- }
- bits_big_endian;
-
- struct
- {
- fractype fraction:FRACBITS __attribute__ ((packed));
- unsigned int exp:EXPBITS __attribute__ ((packed));
- unsigned int sign:1 __attribute__ ((packed));
- }
- bits_little_endian;
-#endif
-}
-FLO_union_type;
-
-
-/* end of header */
+/* We don't currently support extended floats (long doubles) on machines
+ without hardware to deal with them.
+
+ These stubs are just to keep the linker from complaining about unresolved
+ references which can be pulled in from libio & libstdc++, even if the
+ user isn't using long doubles. However, they may generate an unresolved
+ external to abort if abort is not used by the function, and the stubs
+ are referenced from within libc, since libgcc goes before and after the
+ system library. */
+
+#ifdef EXTENDED_FLOAT_STUBS
+__truncxfsf2 (){ abort(); }
+__extendsfxf2 (){ abort(); }
+__addxf3 (){ abort(); }
+__divxf3 (){ abort(); }
+__eqxf2 (){ abort(); }
+__extenddfxf2 (){ abort(); }
+__gtxf2 (){ abort(); }
+__lexf2 (){ abort(); }
+__ltxf2 (){ abort(); }
+__mulxf3 (){ abort(); }
+__negxf2 (){ abort(); }
+__nexf2 (){ abort(); }
+__subxf3 (){ abort(); }
+__truncxfdf2 (){ abort(); }
+
+__trunctfsf2 (){ abort(); }
+__extendsftf2 (){ abort(); }
+__addtf3 (){ abort(); }
+__divtf3 (){ abort(); }
+__eqtf2 (){ abort(); }
+__extenddftf2 (){ abort(); }
+__gttf2 (){ abort(); }
+__letf2 (){ abort(); }
+__lttf2 (){ abort(); }
+__multf3 (){ abort(); }
+__negtf2 (){ abort(); }
+__netf2 (){ abort(); }
+__subtf3 (){ abort(); }
+__trunctfdf2 (){ abort(); }
+__gexf2 (){ abort(); }
+__fixxfsi (){ abort(); }
+__floatsixf (){ abort(); }
+#else /* !EXTENDED_FLOAT_STUBS, rest of file */
/* IEEE "special" number predicates */
#define isinf(x) 0
#else
+#if defined L_thenan_sf
+const fp_number_type __thenan_sf = { CLASS_SNAN, 0, 0, {(fractype) 0} };
+#elif defined L_thenan_df
+const fp_number_type __thenan_df = { CLASS_SNAN, 0, 0, {(fractype) 0} };
+#elif defined FLOAT
+extern const fp_number_type __thenan_sf;
+#else
+extern const fp_number_type __thenan_df;
+#endif
+
INLINE
static fp_number_type *
-nan ()
+nan (void)
{
- static fp_number_type thenan;
-
- return &thenan;
+ /* Discard the const qualifier... */
+#ifdef FLOAT
+ return (fp_number_type *) (& __thenan_sf);
+#else
+ return (fp_number_type *) (& __thenan_df);
+#endif
}
INLINE
return x->class == CLASS_INFINITY;
}
-#endif
+#endif /* NO_NANS */
INLINE
static int
x->sign = !x->sign;
}
-static FLO_type
+extern FLO_type pack_d ( fp_number_type * );
+
+#if defined(L_pack_df) || defined(L_pack_sf)
+FLO_type
pack_d ( fp_number_type * src)
{
FLO_union_type dst;
else if (fraction == 0)
{
exp = 0;
- sign = 0;
}
else
{
}
else
{
- /* Shift by the value */
- fraction >>= shift;
+ int lowbit = (fraction & (((fractype)1 << shift) - 1)) ? 1 : 0;
+ fraction = (fraction >> shift) | lowbit;
+ }
+ if ((fraction & GARDMASK) == GARDMSB)
+ {
+ if ((fraction & (1 << NGARDS)))
+ fraction += GARDROUND + 1;
+ }
+ else
+ {
+ /* Add to the guards to round up. */
+ fraction += GARDROUND;
+ }
+ /* Perhaps the rounding means we now need to change the
+ exponent, because the fraction is no longer denormal. */
+ if (fraction >= IMPLICIT_1)
+ {
+ exp += 1;
}
fraction >>= NGARDS;
}
}
/* We previously used bitfields to store the number, but this doesn't
- handle little/big endian systems conviently, so use shifts and
+ handle little/big endian systems conveniently, so use shifts and
masks */
#ifdef FLOAT_BIT_ORDER_MISMATCH
dst.bits.fraction = fraction;
return dst.value;
}
+#endif
-static void
+#if defined(L_unpack_df) || defined(L_unpack_sf)
+void
unpack_d (FLO_union_type * src, fp_number_type * dst)
{
/* We previously used bitfields to store the number, but this doesn't
- handle little/big endian systems conviently, so use shifts and
+ handle little/big endian systems conveniently, so use shifts and
masks */
fractype fraction;
int exp;
if (exp == 0)
{
/* Hmm. Looks like 0 */
- if (fraction == 0)
+ if (fraction == 0
+#ifdef NO_DENORMALS
+ || 1
+#endif
+ )
{
/* tastes like zero */
dst->class = CLASS_ZERO;
else
{
/* Non zero fraction, means nan */
- if (sign)
+ if (fraction & QUIET_NAN)
{
- dst->class = CLASS_SNAN;
+ dst->class = CLASS_QNAN;
}
else
{
- dst->class = CLASS_QNAN;
+ dst->class = CLASS_SNAN;
}
/* Keep the fraction part as the nan number */
dst->fraction.ll = fraction;
dst->fraction.ll = (fraction << NGARDS) | IMPLICIT_1;
}
}
+#endif /* L_unpack_df || L_unpack_sf */
+#if defined(L_addsub_sf) || defined(L_addsub_df)
static fp_number_type *
_fpadd_parts (fp_number_type * a,
fp_number_type * b,
}
if (iszero (b))
{
+ if (iszero (a))
+ {
+ *tmp = *a;
+ tmp->sign = a->sign & b->sign;
+ return tmp;
+ }
return a;
}
if (iszero (a))
{
tfraction = a_fraction - b_fraction;
}
- if (tfraction > 0)
+ if (tfraction >= 0)
{
tmp->sign = 0;
tmp->normal_exp = a_normal_exp;
fp_number_type b;
fp_number_type tmp;
fp_number_type *res;
+ FLO_union_type au, bu;
- unpack_d ((FLO_union_type *) & arg_a, &a);
- unpack_d ((FLO_union_type *) & arg_b, &b);
+ au.value = arg_a;
+ bu.value = arg_b;
+
+ unpack_d (&au, &a);
+ unpack_d (&bu, &b);
res = _fpadd_parts (&a, &b, &tmp);
fp_number_type b;
fp_number_type tmp;
fp_number_type *res;
+ FLO_union_type au, bu;
+
+ au.value = arg_a;
+ bu.value = arg_b;
- unpack_d ((FLO_union_type *) & arg_a, &a);
- unpack_d ((FLO_union_type *) & arg_b, &b);
+ unpack_d (&au, &a);
+ unpack_d (&bu, &b);
b.sign ^= 1;
return pack_d (res);
}
+#endif /* L_addsub_sf || L_addsub_df */
-static fp_number_type *
+#if defined(L_mul_sf) || defined(L_mul_df)
+static INLINE fp_number_type *
_fpmul_parts ( fp_number_type * a,
fp_number_type * b,
fp_number_type * tmp)
return b;
}
- /* Calculate the mantissa by multiplying both 64bit numbers to get a
- 128 bit number */
+ /* Calculate the mantissa by multiplying both numbers to get a
+ twice-as-wide number. */
{
- fractype x = a->fraction.ll;
- fractype ylow = b->fraction.ll;
- fractype yhigh = 0;
- int bit;
-
#if defined(NO_DI_MODE)
{
+ fractype x = a->fraction.ll;
+ fractype ylow = b->fraction.ll;
+ fractype yhigh = 0;
+ int bit;
+
/* ??? This does multiplies one bit at a time. Optimize. */
for (bit = 0; bit < FRAC_NBITS; bit++)
{
}
}
#elif defined(FLOAT)
+ /* Multiplying two USIs to get a UDI, we're safe. */
{
- /* Multiplying two 32 bit numbers to get a 64 bit number on
- a machine with DI, so we're safe */
-
- DItype answer = (DItype)(a->fraction.ll) * (DItype)(b->fraction.ll);
+ UDItype answer = (UDItype)a->fraction.ll * (UDItype)b->fraction.ll;
- high = answer >> 32;
+ high = answer >> BITS_PER_SI;
low = answer;
}
#else
- /* Doing a 64*64 to 128 */
+ /* fractype is DImode, but we need the result to be twice as wide.
+ Assuming a widening multiply from DImode to TImode is not
+ available, build one by hand. */
{
- UDItype nl = a->fraction.ll & 0xffffffff;
- UDItype nh = a->fraction.ll >> 32;
- UDItype ml = b->fraction.ll & 0xffffffff;
- UDItype mh = b->fraction.ll >>32;
- UDItype pp_ll = ml * nl;
- UDItype pp_hl = mh * nl;
- UDItype pp_lh = ml * nh;
- UDItype pp_hh = mh * nh;
+ USItype nl = a->fraction.ll;
+ USItype nh = a->fraction.ll >> BITS_PER_SI;
+ USItype ml = b->fraction.ll;
+ USItype mh = b->fraction.ll >> BITS_PER_SI;
+ UDItype pp_ll = (UDItype) ml * nl;
+ UDItype pp_hl = (UDItype) mh * nl;
+ UDItype pp_lh = (UDItype) ml * nh;
+ UDItype pp_hh = (UDItype) mh * nh;
UDItype res2 = 0;
UDItype res0 = 0;
UDItype ps_hh__ = pp_hl + pp_lh;
if (ps_hh__ < pp_hl)
- res2 += 0x100000000LL;
- pp_hl = (ps_hh__ << 32) & 0xffffffff00000000LL;
+ res2 += (UDItype)1 << BITS_PER_SI;
+ pp_hl = (UDItype)(USItype)ps_hh__ << BITS_PER_SI;
res0 = pp_ll + pp_hl;
if (res0 < pp_ll)
res2++;
- res2 += ((ps_hh__ >> 32) & 0xffffffffL) + pp_hh;
+ res2 += (ps_hh__ >> BITS_PER_SI) + pp_hh;
high = res2;
low = res0;
}
fp_number_type b;
fp_number_type tmp;
fp_number_type *res;
+ FLO_union_type au, bu;
- unpack_d ((FLO_union_type *) & arg_a, &a);
- unpack_d ((FLO_union_type *) & arg_b, &b);
+ au.value = arg_a;
+ bu.value = arg_b;
+
+ unpack_d (&au, &a);
+ unpack_d (&bu, &b);
res = _fpmul_parts (&a, &b, &tmp);
return pack_d (res);
}
+#endif /* L_mul_sf || L_mul_df */
-static fp_number_type *
+#if defined(L_div_sf) || defined(L_div_df)
+static INLINE fp_number_type *
_fpdiv_parts (fp_number_type * a,
- fp_number_type * b,
- fp_number_type * tmp)
+ fp_number_type * b)
{
- fractype low = 0;
- fractype high = 0;
- fractype r0, r1, y0, y1, bit;
- fractype q;
+ fractype bit;
fractype numerator;
fractype denominator;
fractype quotient;
- fractype remainder;
if (isnan (a))
{
{
return b;
}
+
+ a->sign = a->sign ^ b->sign;
+
if (isinf (a) || iszero (a))
{
if (a->class == b->class)
return nan ();
return a;
}
- a->sign = a->sign ^ b->sign;
if (isinf (b))
{
if (iszero (b))
{
a->class = CLASS_INFINITY;
- return b;
+ return a;
}
/* Calculate the mantissa by multiplying both 64bit numbers to get a
128 bit number */
{
- int carry;
- intfrac d0, d1; /* weren't unsigned before ??? */
-
/* quotient =
( numerator / denominator) * 2^(numerator exponent - denominator exponent)
*/
{
fp_number_type a;
fp_number_type b;
- fp_number_type tmp;
fp_number_type *res;
+ FLO_union_type au, bu;
+
+ au.value = arg_a;
+ bu.value = arg_b;
- unpack_d ((FLO_union_type *) & arg_a, &a);
- unpack_d ((FLO_union_type *) & arg_b, &b);
+ unpack_d (&au, &a);
+ unpack_d (&bu, &b);
- res = _fpdiv_parts (&a, &b, &tmp);
+ res = _fpdiv_parts (&a, &b);
return pack_d (res);
}
+#endif /* L_div_sf || L_div_df */
+#if defined(L_fpcmp_parts_sf) || defined(L_fpcmp_parts_df)
/* according to the demo, fpcmp returns a comparison with 0... thus
a<b -> -1
a==b -> 0
a>b -> +1
*/
-static int
-_fpcmp_parts (fp_number_type * a, fp_number_type * b)
+int
+__fpcmp_parts (fp_number_type * a, fp_number_type * b)
{
#if 0
/* either nan -> unordered. Must be checked outside of this routine. */
/* after all that, they're equal. */
return 0;
}
+#endif
+#if defined(L_compare_sf) || defined(L_compare_df)
CMPtype
compare (FLO_type arg_a, FLO_type arg_b)
{
fp_number_type a;
fp_number_type b;
+ FLO_union_type au, bu;
+
+ au.value = arg_a;
+ bu.value = arg_b;
- unpack_d ((FLO_union_type *) & arg_a, &a);
- unpack_d ((FLO_union_type *) & arg_b, &b);
+ unpack_d (&au, &a);
+ unpack_d (&bu, &b);
- return _fpcmp_parts (&a, &b);
+ return __fpcmp_parts (&a, &b);
}
+#endif /* L_compare_sf || L_compare_df */
#ifndef US_SOFTWARE_GOFAST
/* These should be optimized for their specific tasks someday. */
+#if defined(L_eq_sf) || defined(L_eq_df)
CMPtype
_eq_f2 (FLO_type arg_a, FLO_type arg_b)
{
fp_number_type a;
fp_number_type b;
+ FLO_union_type au, bu;
+
+ au.value = arg_a;
+ bu.value = arg_b;
- unpack_d ((FLO_union_type *) & arg_a, &a);
- unpack_d ((FLO_union_type *) & arg_b, &b);
+ unpack_d (&au, &a);
+ unpack_d (&bu, &b);
if (isnan (&a) || isnan (&b))
return 1; /* false, truth == 0 */
- return _fpcmp_parts (&a, &b) ;
+ return __fpcmp_parts (&a, &b) ;
}
+#endif /* L_eq_sf || L_eq_df */
+#if defined(L_ne_sf) || defined(L_ne_df)
CMPtype
_ne_f2 (FLO_type arg_a, FLO_type arg_b)
{
fp_number_type a;
fp_number_type b;
+ FLO_union_type au, bu;
- unpack_d ((FLO_union_type *) & arg_a, &a);
- unpack_d ((FLO_union_type *) & arg_b, &b);
+ au.value = arg_a;
+ bu.value = arg_b;
+
+ unpack_d (&au, &a);
+ unpack_d (&bu, &b);
if (isnan (&a) || isnan (&b))
return 1; /* true, truth != 0 */
- return _fpcmp_parts (&a, &b) ;
+ return __fpcmp_parts (&a, &b) ;
}
+#endif /* L_ne_sf || L_ne_df */
+#if defined(L_gt_sf) || defined(L_gt_df)
CMPtype
_gt_f2 (FLO_type arg_a, FLO_type arg_b)
{
fp_number_type a;
fp_number_type b;
+ FLO_union_type au, bu;
+
+ au.value = arg_a;
+ bu.value = arg_b;
- unpack_d ((FLO_union_type *) & arg_a, &a);
- unpack_d ((FLO_union_type *) & arg_b, &b);
+ unpack_d (&au, &a);
+ unpack_d (&bu, &b);
if (isnan (&a) || isnan (&b))
return -1; /* false, truth > 0 */
- return _fpcmp_parts (&a, &b);
+ return __fpcmp_parts (&a, &b);
}
+#endif /* L_gt_sf || L_gt_df */
+#if defined(L_ge_sf) || defined(L_ge_df)
CMPtype
_ge_f2 (FLO_type arg_a, FLO_type arg_b)
{
fp_number_type a;
fp_number_type b;
+ FLO_union_type au, bu;
- unpack_d ((FLO_union_type *) & arg_a, &a);
- unpack_d ((FLO_union_type *) & arg_b, &b);
+ au.value = arg_a;
+ bu.value = arg_b;
+
+ unpack_d (&au, &a);
+ unpack_d (&bu, &b);
if (isnan (&a) || isnan (&b))
return -1; /* false, truth >= 0 */
- return _fpcmp_parts (&a, &b) ;
+ return __fpcmp_parts (&a, &b) ;
}
+#endif /* L_ge_sf || L_ge_df */
+#if defined(L_lt_sf) || defined(L_lt_df)
CMPtype
_lt_f2 (FLO_type arg_a, FLO_type arg_b)
{
fp_number_type a;
fp_number_type b;
+ FLO_union_type au, bu;
+
+ au.value = arg_a;
+ bu.value = arg_b;
- unpack_d ((FLO_union_type *) & arg_a, &a);
- unpack_d ((FLO_union_type *) & arg_b, &b);
+ unpack_d (&au, &a);
+ unpack_d (&bu, &b);
if (isnan (&a) || isnan (&b))
return 1; /* false, truth < 0 */
- return _fpcmp_parts (&a, &b);
+ return __fpcmp_parts (&a, &b);
}
+#endif /* L_lt_sf || L_lt_df */
+#if defined(L_le_sf) || defined(L_le_df)
CMPtype
_le_f2 (FLO_type arg_a, FLO_type arg_b)
{
fp_number_type a;
fp_number_type b;
+ FLO_union_type au, bu;
+
+ au.value = arg_a;
+ bu.value = arg_b;
- unpack_d ((FLO_union_type *) & arg_a, &a);
- unpack_d ((FLO_union_type *) & arg_b, &b);
+ unpack_d (&au, &a);
+ unpack_d (&bu, &b);
if (isnan (&a) || isnan (&b))
return 1; /* false, truth <= 0 */
- return _fpcmp_parts (&a, &b) ;
+ return __fpcmp_parts (&a, &b) ;
+}
+#endif /* L_le_sf || L_le_df */
+
+#if defined(L_unord_sf) || defined(L_unord_df)
+CMPtype
+_unord_f2 (FLO_type arg_a, FLO_type arg_b)
+{
+ fp_number_type a;
+ fp_number_type b;
+ FLO_union_type au, bu;
+
+ au.value = arg_a;
+ bu.value = arg_b;
+
+ unpack_d (&au, &a);
+ unpack_d (&bu, &b);
+
+ return (isnan (&a) || isnan (&b));
}
+#endif /* L_unord_sf || L_unord_df */
#endif /* ! US_SOFTWARE_GOFAST */
+#if defined(L_si_to_sf) || defined(L_si_to_df)
FLO_type
si_to_float (SItype arg_a)
{
{
/* Special case for minint, since there is no +ve integer
representation for it */
- if (arg_a == 0x80000000)
+ if (arg_a == (- MAX_SI_INT - 1))
{
- return -2147483648.0;
+ return (FLO_type)(- MAX_SI_INT - 1);
}
in.fraction.ll = (-arg_a);
}
}
return pack_d (&in);
}
+#endif /* L_si_to_sf || L_si_to_df */
+
+#if defined(L_usi_to_sf) || defined(L_usi_to_df)
+FLO_type
+usi_to_float (USItype arg_a)
+{
+ fp_number_type in;
+
+ in.sign = 0;
+ if (!arg_a)
+ {
+ in.class = CLASS_ZERO;
+ }
+ else
+ {
+ in.class = CLASS_NUMBER;
+ in.normal_exp = FRACBITS + NGARDS;
+ in.fraction.ll = arg_a;
+
+ while (in.fraction.ll > (1LL << (FRACBITS + NGARDS)))
+ {
+ in.fraction.ll >>= 1;
+ in.normal_exp += 1;
+ }
+ while (in.fraction.ll < (1LL << (FRACBITS + NGARDS)))
+ {
+ in.fraction.ll <<= 1;
+ in.normal_exp -= 1;
+ }
+ }
+ return pack_d (&in);
+}
+#endif
+#if defined(L_sf_to_si) || defined(L_df_to_si)
SItype
float_to_si (FLO_type arg_a)
{
fp_number_type a;
SItype tmp;
+ FLO_union_type au;
+
+ au.value = arg_a;
+ unpack_d (&au, &a);
- unpack_d ((FLO_union_type *) & arg_a, &a);
if (iszero (&a))
return 0;
if (isnan (&a))
return 0;
/* get reasonable MAX_SI_INT... */
if (isinf (&a))
- return a.sign ? MAX_SI_INT : (-MAX_SI_INT)-1;
+ return a.sign ? (-MAX_SI_INT)-1 : MAX_SI_INT;
/* it is a number, but a small one */
if (a.normal_exp < 0)
return 0;
- if (a.normal_exp > 30)
+ if (a.normal_exp > BITS_PER_SI - 2)
return a.sign ? (-MAX_SI_INT)-1 : MAX_SI_INT;
tmp = a.fraction.ll >> ((FRACBITS + NGARDS) - a.normal_exp);
return a.sign ? (-tmp) : (tmp);
}
+#endif /* L_sf_to_si || L_df_to_si */
+#if defined(L_sf_to_usi) || defined(L_df_to_usi)
#ifdef US_SOFTWARE_GOFAST
/* While libgcc2.c defines its own __fixunssfsi and __fixunsdfsi routines,
we also define them for GOFAST because the ones in libgcc2.c have the
float_to_usi (FLO_type arg_a)
{
fp_number_type a;
+ FLO_union_type au;
+
+ au.value = arg_a;
+ unpack_d (&au, &a);
- unpack_d ((FLO_union_type *) & arg_a, &a);
if (iszero (&a))
return 0;
if (isnan (&a))
return 0;
- /* get reasonable MAX_USI_INT... */
- if (isinf (&a))
- return a.sign ? MAX_USI_INT : 0;
/* it is a negative number */
if (a.sign)
return 0;
+ /* get reasonable MAX_USI_INT... */
+ if (isinf (&a))
+ return MAX_USI_INT;
/* it is a number, but a small one */
if (a.normal_exp < 0)
return 0;
- if (a.normal_exp > 31)
+ if (a.normal_exp > BITS_PER_SI - 1)
return MAX_USI_INT;
else if (a.normal_exp > (FRACBITS + NGARDS))
- return a.fraction.ll << ((FRACBITS + NGARDS) - a.normal_exp);
+ return a.fraction.ll << (a.normal_exp - (FRACBITS + NGARDS));
else
return a.fraction.ll >> ((FRACBITS + NGARDS) - a.normal_exp);
}
-#endif
+#endif /* US_SOFTWARE_GOFAST */
+#endif /* L_sf_to_usi || L_df_to_usi */
+#if defined(L_negate_sf) || defined(L_negate_df)
FLO_type
negate (FLO_type arg_a)
{
fp_number_type a;
+ FLO_union_type au;
+
+ au.value = arg_a;
+ unpack_d (&au, &a);
- unpack_d ((FLO_union_type *) & arg_a, &a);
flip_sign (&a);
return pack_d (&a);
}
+#endif /* L_negate_sf || L_negate_df */
#ifdef FLOAT
+#if defined(L_make_sf)
SFtype
__make_fp(fp_class_type class,
unsigned int sign,
in.fraction.ll = frac;
return pack_d (&in);
}
+#endif /* L_make_sf */
#ifndef FLOAT_ONLY
This is needed for some 8-bit ports that can't handle well values that
are 8-bytes in size, so we just don't support double for them at all. */
-extern DFtype __make_dp (fp_class_type, unsigned int, int, UDItype frac);
-
+#if defined(L_sf_to_df)
DFtype
sf_to_df (SFtype arg_a)
{
fp_number_type in;
+ FLO_union_type au;
+
+ au.value = arg_a;
+ unpack_d (&au, &in);
- unpack_d ((FLO_union_type *) & arg_a, &in);
return __make_dp (in.class, in.sign, in.normal_exp,
((UDItype) in.fraction.ll) << F_D_BITOFF);
}
+#endif /* L_sf_to_df */
-#endif
-#endif
+#endif /* ! FLOAT_ONLY */
+#endif /* FLOAT */
#ifndef FLOAT
extern SFtype __make_fp (fp_class_type, unsigned int, int, USItype);
+#if defined(L_make_df)
DFtype
__make_dp (fp_class_type class, unsigned int sign, int exp, UDItype frac)
{
in.fraction.ll = frac;
return pack_d (&in);
}
+#endif /* L_make_df */
+#if defined(L_df_to_sf)
SFtype
df_to_sf (DFtype arg_a)
{
fp_number_type in;
+ USItype sffrac;
+ FLO_union_type au;
+
+ au.value = arg_a;
+ unpack_d (&au, &in);
+
+ sffrac = in.fraction.ll >> F_D_BITOFF;
- unpack_d ((FLO_union_type *) & arg_a, &in);
- return __make_fp (in.class, in.sign, in.normal_exp,
- in.fraction.ll >> F_D_BITOFF);
+ /* We set the lowest guard bit in SFFRAC if we discarded any non
+ zero bits. */
+ if ((in.fraction.ll & (((USItype) 1 << F_D_BITOFF) - 1)) != 0)
+ sffrac |= 1;
+
+ return __make_fp (in.class, in.sign, in.normal_exp, sffrac);
}
+#endif /* L_df_to_sf */
-#endif
+#endif /* ! FLOAT */
+#endif /* !EXTENDED_FLOAT_STUBS */
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