diff options
Diffstat (limited to 'src/include/fpu/softfloat.h')
| -rw-r--r-- | src/include/fpu/softfloat.h | 762 |
1 files changed, 762 insertions, 0 deletions
diff --git a/src/include/fpu/softfloat.h b/src/include/fpu/softfloat.h new file mode 100644 index 0000000..ded34eb --- /dev/null +++ b/src/include/fpu/softfloat.h @@ -0,0 +1,762 @@ +/* + * QEMU float support + * + * The code in this source file is derived from release 2a of the SoftFloat + * IEC/IEEE Floating-point Arithmetic Package. Those parts of the code (and + * some later contributions) are provided under that license, as detailed below. + * It has subsequently been modified by contributors to the QEMU Project, + * so some portions are provided under: + * the SoftFloat-2a license + * the BSD license + * GPL-v2-or-later + * + * Any future contributions to this file after December 1st 2014 will be + * taken to be licensed under the Softfloat-2a license unless specifically + * indicated otherwise. + */ + +/* +=============================================================================== +This C header file is part of the SoftFloat IEC/IEEE Floating-point +Arithmetic Package, Release 2a. + +Written by John R. Hauser. This work was made possible in part by the +International Computer Science Institute, located at Suite 600, 1947 Center +Street, Berkeley, California 94704. Funding was partially provided by the +National Science Foundation under grant MIP-9311980. The original version +of this code was written as part of a project to build a fixed-point vector +processor in collaboration with the University of California at Berkeley, +overseen by Profs. Nelson Morgan and John Wawrzynek. More information +is available through the Web page `http://HTTP.CS.Berkeley.EDU/~jhauser/ +arithmetic/SoftFloat.html'. + +THIS SOFTWARE IS DISTRIBUTED AS IS, FOR FREE. Although reasonable effort +has been made to avoid it, THIS SOFTWARE MAY CONTAIN FAULTS THAT WILL AT +TIMES RESULT IN INCORRECT BEHAVIOR. USE OF THIS SOFTWARE IS RESTRICTED TO +PERSONS AND ORGANIZATIONS WHO CAN AND WILL TAKE FULL RESPONSIBILITY FOR ANY +AND ALL LOSSES, COSTS, OR OTHER PROBLEMS ARISING FROM ITS USE. + +Derivative works are acceptable, even for commercial purposes, so long as +(1) they include prominent notice that the work is derivative, and (2) they +include prominent notice akin to these four paragraphs for those parts of +this code that are retained. + +=============================================================================== +*/ + +/* BSD licensing: + * Copyright (c) 2006, Fabrice Bellard + * All rights reserved. + * + * Redistribution and use in source and binary forms, with or without + * modification, are permitted provided that the following conditions are met: + * + * 1. Redistributions of source code must retain the above copyright notice, + * this list of conditions and the following disclaimer. + * + * 2. Redistributions in binary form must reproduce the above copyright notice, + * this list of conditions and the following disclaimer in the documentation + * and/or other materials provided with the distribution. + * + * 3. Neither the name of the copyright holder nor the names of its contributors + * may be used to endorse or promote products derived from this software without + * specific prior written permission. + * + * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS" + * AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE + * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE + * ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT HOLDER OR CONTRIBUTORS BE + * LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR + * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF + * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS + * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN + * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) + * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF + * THE POSSIBILITY OF SUCH DAMAGE. + */ + +/* Portions of this work are licensed under the terms of the GNU GPL, + * version 2 or later. See the COPYING file in the top-level directory. + */ + +#ifndef SOFTFLOAT_H +#define SOFTFLOAT_H + +#if defined(CONFIG_SOLARIS) && defined(CONFIG_NEEDS_LIBSUNMATH) +#include <sunmath.h> +#endif + +#include <inttypes.h> +#include "config-host.h" +#include "qemu/osdep.h" + +/*---------------------------------------------------------------------------- +| Each of the following `typedef's defines the most convenient type that holds +| integers of at least as many bits as specified. For example, `uint8' should +| be the most convenient type that can hold unsigned integers of as many as +| 8 bits. The `flag' type must be able to hold either a 0 or 1. For most +| implementations of C, `flag', `uint8', and `int8' should all be `typedef'ed +| to the same as `int'. +*----------------------------------------------------------------------------*/ +typedef uint8_t flag; +typedef uint8_t uint8; +typedef int8_t int8; +typedef unsigned int uint32; +typedef signed int int32; +typedef uint64_t uint64; +typedef int64_t int64; + +#define LIT64( a ) a##LL + +/*---------------------------------------------------------------------------- +| Software IEC/IEEE floating-point ordering relations +*----------------------------------------------------------------------------*/ +enum { + float_relation_less = -1, + float_relation_equal = 0, + float_relation_greater = 1, + float_relation_unordered = 2 +}; + +/*---------------------------------------------------------------------------- +| Software IEC/IEEE floating-point types. +*----------------------------------------------------------------------------*/ +/* Use structures for soft-float types. This prevents accidentally mixing + them with native int/float types. A sufficiently clever compiler and + sane ABI should be able to see though these structs. However + x86/gcc 3.x seems to struggle a bit, so leave them disabled by default. */ +//#define USE_SOFTFLOAT_STRUCT_TYPES +#ifdef USE_SOFTFLOAT_STRUCT_TYPES +typedef struct { + uint16_t v; +} float16; +#define float16_val(x) (((float16)(x)).v) +#define make_float16(x) __extension__ ({ float16 f16_val = {x}; f16_val; }) +#define const_float16(x) { x } +typedef struct { + uint32_t v; +} float32; +/* The cast ensures an error if the wrong type is passed. */ +#define float32_val(x) (((float32)(x)).v) +#define make_float32(x) __extension__ ({ float32 f32_val = {x}; f32_val; }) +#define const_float32(x) { x } +typedef struct { + uint64_t v; +} float64; +#define float64_val(x) (((float64)(x)).v) +#define make_float64(x) __extension__ ({ float64 f64_val = {x}; f64_val; }) +#define const_float64(x) { x } +#else +typedef uint16_t float16; +typedef uint32_t float32; +typedef uint64_t float64; +#define float16_val(x) (x) +#define float32_val(x) (x) +#define float64_val(x) (x) +#define make_float16(x) (x) +#define make_float32(x) (x) +#define make_float64(x) (x) +#define const_float16(x) (x) +#define const_float32(x) (x) +#define const_float64(x) (x) +#endif +typedef struct { + uint64_t low; + uint16_t high; +} floatx80; +#define make_floatx80(exp, mant) ((floatx80) { mant, exp }) +#define make_floatx80_init(exp, mant) { .low = mant, .high = exp } +typedef struct { +#ifdef HOST_WORDS_BIGENDIAN + uint64_t high, low; +#else + uint64_t low, high; +#endif +} float128; +#define make_float128(high_, low_) ((float128) { .high = high_, .low = low_ }) +#define make_float128_init(high_, low_) { .high = high_, .low = low_ } + +/*---------------------------------------------------------------------------- +| Software IEC/IEEE floating-point underflow tininess-detection mode. +*----------------------------------------------------------------------------*/ +enum { + float_tininess_after_rounding = 0, + float_tininess_before_rounding = 1 +}; + +/*---------------------------------------------------------------------------- +| Software IEC/IEEE floating-point rounding mode. +*----------------------------------------------------------------------------*/ +enum { + float_round_nearest_even = 0, + float_round_down = 1, + float_round_up = 2, + float_round_to_zero = 3, + float_round_ties_away = 4, +}; + +/*---------------------------------------------------------------------------- +| Software IEC/IEEE floating-point exception flags. +*----------------------------------------------------------------------------*/ +enum { + float_flag_invalid = 1, + float_flag_divbyzero = 4, + float_flag_overflow = 8, + float_flag_underflow = 16, + float_flag_inexact = 32, + float_flag_input_denormal = 64, + float_flag_output_denormal = 128 +}; + +typedef struct float_status { + signed char float_detect_tininess; + signed char float_rounding_mode; + signed char float_exception_flags; + signed char floatx80_rounding_precision; + /* should denormalised results go to zero and set the inexact flag? */ + flag flush_to_zero; + /* should denormalised inputs go to zero and set the input_denormal flag? */ + flag flush_inputs_to_zero; + flag default_nan_mode; +} float_status; + +static inline void set_float_detect_tininess(int val, float_status *status) +{ + status->float_detect_tininess = val; +} +static inline void set_float_rounding_mode(int val, float_status *status) +{ + status->float_rounding_mode = val; +} +static inline void set_float_exception_flags(int val, float_status *status) +{ + status->float_exception_flags = val; +} +static inline void set_floatx80_rounding_precision(int val, + float_status *status) +{ + status->floatx80_rounding_precision = val; +} +static inline void set_flush_to_zero(flag val, float_status *status) +{ + status->flush_to_zero = val; +} +static inline void set_flush_inputs_to_zero(flag val, float_status *status) +{ + status->flush_inputs_to_zero = val; +} +static inline void set_default_nan_mode(flag val, float_status *status) +{ + status->default_nan_mode = val; +} +static inline int get_float_detect_tininess(float_status *status) +{ + return status->float_detect_tininess; +} +static inline int get_float_rounding_mode(float_status *status) +{ + return status->float_rounding_mode; +} +static inline int get_float_exception_flags(float_status *status) +{ + return status->float_exception_flags; +} +static inline int get_floatx80_rounding_precision(float_status *status) +{ + return status->floatx80_rounding_precision; +} +static inline flag get_flush_to_zero(float_status *status) +{ + return status->flush_to_zero; +} +static inline flag get_flush_inputs_to_zero(float_status *status) +{ + return status->flush_inputs_to_zero; +} +static inline flag get_default_nan_mode(float_status *status) +{ + return status->default_nan_mode; +} + +/*---------------------------------------------------------------------------- +| Routine to raise any or all of the software IEC/IEEE floating-point +| exception flags. +*----------------------------------------------------------------------------*/ +void float_raise(int8 flags, float_status *status); + +/*---------------------------------------------------------------------------- +| If `a' is denormal and we are in flush-to-zero mode then set the +| input-denormal exception and return zero. Otherwise just return the value. +*----------------------------------------------------------------------------*/ +float32 float32_squash_input_denormal(float32 a, float_status *status); +float64 float64_squash_input_denormal(float64 a, float_status *status); + +/*---------------------------------------------------------------------------- +| Options to indicate which negations to perform in float*_muladd() +| Using these differs from negating an input or output before calling +| the muladd function in that this means that a NaN doesn't have its +| sign bit inverted before it is propagated. +| We also support halving the result before rounding, as a special +| case to support the ARM fused-sqrt-step instruction FRSQRTS. +*----------------------------------------------------------------------------*/ +enum { + float_muladd_negate_c = 1, + float_muladd_negate_product = 2, + float_muladd_negate_result = 4, + float_muladd_halve_result = 8, +}; + +/*---------------------------------------------------------------------------- +| Software IEC/IEEE integer-to-floating-point conversion routines. +*----------------------------------------------------------------------------*/ +float32 int32_to_float32(int32_t, float_status *status); +float64 int32_to_float64(int32_t, float_status *status); +float32 uint32_to_float32(uint32_t, float_status *status); +float64 uint32_to_float64(uint32_t, float_status *status); +floatx80 int32_to_floatx80(int32_t, float_status *status); +float128 int32_to_float128(int32_t, float_status *status); +float32 int64_to_float32(int64_t, float_status *status); +float64 int64_to_float64(int64_t, float_status *status); +floatx80 int64_to_floatx80(int64_t, float_status *status); +float128 int64_to_float128(int64_t, float_status *status); +float32 uint64_to_float32(uint64_t, float_status *status); +float64 uint64_to_float64(uint64_t, float_status *status); +float128 uint64_to_float128(uint64_t, float_status *status); + +/* We provide the int16 versions for symmetry of API with float-to-int */ +static inline float32 int16_to_float32(int16_t v, float_status *status) +{ + return int32_to_float32(v, status); +} + +static inline float32 uint16_to_float32(uint16_t v, float_status *status) +{ + return uint32_to_float32(v, status); +} + +static inline float64 int16_to_float64(int16_t v, float_status *status) +{ + return int32_to_float64(v, status); +} + +static inline float64 uint16_to_float64(uint16_t v, float_status *status) +{ + return uint32_to_float64(v, status); +} + +/*---------------------------------------------------------------------------- +| Software half-precision conversion routines. +*----------------------------------------------------------------------------*/ +float16 float32_to_float16(float32, flag, float_status *status); +float32 float16_to_float32(float16, flag, float_status *status); +float16 float64_to_float16(float64 a, flag ieee, float_status *status); +float64 float16_to_float64(float16 a, flag ieee, float_status *status); + +/*---------------------------------------------------------------------------- +| Software half-precision operations. +*----------------------------------------------------------------------------*/ +int float16_is_quiet_nan( float16 ); +int float16_is_signaling_nan( float16 ); +float16 float16_maybe_silence_nan( float16 ); + +static inline int float16_is_any_nan(float16 a) +{ + return ((float16_val(a) & ~0x8000) > 0x7c00); +} + +/*---------------------------------------------------------------------------- +| The pattern for a default generated half-precision NaN. +*----------------------------------------------------------------------------*/ +extern const float16 float16_default_nan; + +/*---------------------------------------------------------------------------- +| Software IEC/IEEE single-precision conversion routines. +*----------------------------------------------------------------------------*/ +int_fast16_t float32_to_int16(float32, float_status *status); +uint_fast16_t float32_to_uint16(float32, float_status *status); +int_fast16_t float32_to_int16_round_to_zero(float32, float_status *status); +uint_fast16_t float32_to_uint16_round_to_zero(float32, float_status *status); +int32 float32_to_int32(float32, float_status *status); +int32 float32_to_int32_round_to_zero(float32, float_status *status); +uint32 float32_to_uint32(float32, float_status *status); +uint32 float32_to_uint32_round_to_zero(float32, float_status *status); +int64 float32_to_int64(float32, float_status *status); +uint64 float32_to_uint64(float32, float_status *status); +uint64 float32_to_uint64_round_to_zero(float32, float_status *status); +int64 float32_to_int64_round_to_zero(float32, float_status *status); +float64 float32_to_float64(float32, float_status *status); +floatx80 float32_to_floatx80(float32, float_status *status); +float128 float32_to_float128(float32, float_status *status); + +/*---------------------------------------------------------------------------- +| Software IEC/IEEE single-precision operations. +*----------------------------------------------------------------------------*/ +float32 float32_round_to_int(float32, float_status *status); +float32 float32_add(float32, float32, float_status *status); +float32 float32_sub(float32, float32, float_status *status); +float32 float32_mul(float32, float32, float_status *status); +float32 float32_div(float32, float32, float_status *status); +float32 float32_rem(float32, float32, float_status *status); +float32 float32_muladd(float32, float32, float32, int, float_status *status); +float32 float32_sqrt(float32, float_status *status); +float32 float32_exp2(float32, float_status *status); +float32 float32_log2(float32, float_status *status); +int float32_eq(float32, float32, float_status *status); +int float32_le(float32, float32, float_status *status); +int float32_lt(float32, float32, float_status *status); +int float32_unordered(float32, float32, float_status *status); +int float32_eq_quiet(float32, float32, float_status *status); +int float32_le_quiet(float32, float32, float_status *status); +int float32_lt_quiet(float32, float32, float_status *status); +int float32_unordered_quiet(float32, float32, float_status *status); +int float32_compare(float32, float32, float_status *status); +int float32_compare_quiet(float32, float32, float_status *status); +float32 float32_min(float32, float32, float_status *status); +float32 float32_max(float32, float32, float_status *status); +float32 float32_minnum(float32, float32, float_status *status); +float32 float32_maxnum(float32, float32, float_status *status); +float32 float32_minnummag(float32, float32, float_status *status); +float32 float32_maxnummag(float32, float32, float_status *status); +int float32_is_quiet_nan( float32 ); +int float32_is_signaling_nan( float32 ); +float32 float32_maybe_silence_nan( float32 ); +float32 float32_scalbn(float32, int, float_status *status); + +static inline float32 float32_abs(float32 a) +{ + /* Note that abs does *not* handle NaN specially, nor does + * it flush denormal inputs to zero. + */ + return make_float32(float32_val(a) & 0x7fffffff); +} + +static inline float32 float32_chs(float32 a) +{ + /* Note that chs does *not* handle NaN specially, nor does + * it flush denormal inputs to zero. + */ + return make_float32(float32_val(a) ^ 0x80000000); +} + +static inline int float32_is_infinity(float32 a) +{ + return (float32_val(a) & 0x7fffffff) == 0x7f800000; +} + +static inline int float32_is_neg(float32 a) +{ + return float32_val(a) >> 31; +} + +static inline int float32_is_zero(float32 a) +{ + return (float32_val(a) & 0x7fffffff) == 0; +} + +static inline int float32_is_any_nan(float32 a) +{ + return ((float32_val(a) & ~(1 << 31)) > 0x7f800000UL); +} + +static inline int float32_is_zero_or_denormal(float32 a) +{ + return (float32_val(a) & 0x7f800000) == 0; +} + +static inline float32 float32_set_sign(float32 a, int sign) +{ + return make_float32((float32_val(a) & 0x7fffffff) | (sign << 31)); +} + +#define float32_zero make_float32(0) +#define float32_one make_float32(0x3f800000) +#define float32_ln2 make_float32(0x3f317218) +#define float32_pi make_float32(0x40490fdb) +#define float32_half make_float32(0x3f000000) +#define float32_infinity make_float32(0x7f800000) + + +/*---------------------------------------------------------------------------- +| The pattern for a default generated single-precision NaN. +*----------------------------------------------------------------------------*/ +extern const float32 float32_default_nan; + +/*---------------------------------------------------------------------------- +| Software IEC/IEEE double-precision conversion routines. +*----------------------------------------------------------------------------*/ +int_fast16_t float64_to_int16(float64, float_status *status); +uint_fast16_t float64_to_uint16(float64, float_status *status); +int_fast16_t float64_to_int16_round_to_zero(float64, float_status *status); +uint_fast16_t float64_to_uint16_round_to_zero(float64, float_status *status); +int32 float64_to_int32(float64, float_status *status); +int32 float64_to_int32_round_to_zero(float64, float_status *status); +uint32 float64_to_uint32(float64, float_status *status); +uint32 float64_to_uint32_round_to_zero(float64, float_status *status); +int64 float64_to_int64(float64, float_status *status); +int64 float64_to_int64_round_to_zero(float64, float_status *status); +uint64 float64_to_uint64(float64 a, float_status *status); +uint64 float64_to_uint64_round_to_zero(float64 a, float_status *status); +float32 float64_to_float32(float64, float_status *status); +floatx80 float64_to_floatx80(float64, float_status *status); +float128 float64_to_float128(float64, float_status *status); + +/*---------------------------------------------------------------------------- +| Software IEC/IEEE double-precision operations. +*----------------------------------------------------------------------------*/ +float64 float64_round_to_int(float64, float_status *status); +float64 float64_trunc_to_int(float64, float_status *status); +float64 float64_add(float64, float64, float_status *status); +float64 float64_sub(float64, float64, float_status *status); +float64 float64_mul(float64, float64, float_status *status); +float64 float64_div(float64, float64, float_status *status); +float64 float64_rem(float64, float64, float_status *status); +float64 float64_muladd(float64, float64, float64, int, float_status *status); +float64 float64_sqrt(float64, float_status *status); +float64 float64_log2(float64, float_status *status); +int float64_eq(float64, float64, float_status *status); +int float64_le(float64, float64, float_status *status); +int float64_lt(float64, float64, float_status *status); +int float64_unordered(float64, float64, float_status *status); +int float64_eq_quiet(float64, float64, float_status *status); +int float64_le_quiet(float64, float64, float_status *status); +int float64_lt_quiet(float64, float64, float_status *status); +int float64_unordered_quiet(float64, float64, float_status *status); +int float64_compare(float64, float64, float_status *status); +int float64_compare_quiet(float64, float64, float_status *status); +float64 float64_min(float64, float64, float_status *status); +float64 float64_max(float64, float64, float_status *status); +float64 float64_minnum(float64, float64, float_status *status); +float64 float64_maxnum(float64, float64, float_status *status); +float64 float64_minnummag(float64, float64, float_status *status); +float64 float64_maxnummag(float64, float64, float_status *status); +int float64_is_quiet_nan( float64 a ); +int float64_is_signaling_nan( float64 ); +float64 float64_maybe_silence_nan( float64 ); +float64 float64_scalbn(float64, int, float_status *status); + +static inline float64 float64_abs(float64 a) +{ + /* Note that abs does *not* handle NaN specially, nor does + * it flush denormal inputs to zero. + */ + return make_float64(float64_val(a) & 0x7fffffffffffffffLL); +} + +static inline float64 float64_chs(float64 a) +{ + /* Note that chs does *not* handle NaN specially, nor does + * it flush denormal inputs to zero. + */ + return make_float64(float64_val(a) ^ 0x8000000000000000LL); +} + +static inline int float64_is_infinity(float64 a) +{ + return (float64_val(a) & 0x7fffffffffffffffLL ) == 0x7ff0000000000000LL; +} + +static inline int float64_is_neg(float64 a) +{ + return float64_val(a) >> 63; +} + +static inline int float64_is_zero(float64 a) +{ + return (float64_val(a) & 0x7fffffffffffffffLL) == 0; +} + +static inline int float64_is_any_nan(float64 a) +{ + return ((float64_val(a) & ~(1ULL << 63)) > 0x7ff0000000000000ULL); +} + +static inline int float64_is_zero_or_denormal(float64 a) +{ + return (float64_val(a) & 0x7ff0000000000000LL) == 0; +} + +static inline float64 float64_set_sign(float64 a, int sign) +{ + return make_float64((float64_val(a) & 0x7fffffffffffffffULL) + | ((int64_t)sign << 63)); +} + +#define float64_zero make_float64(0) +#define float64_one make_float64(0x3ff0000000000000LL) +#define float64_ln2 make_float64(0x3fe62e42fefa39efLL) +#define float64_pi make_float64(0x400921fb54442d18LL) +#define float64_half make_float64(0x3fe0000000000000LL) +#define float64_infinity make_float64(0x7ff0000000000000LL) + +/*---------------------------------------------------------------------------- +| The pattern for a default generated double-precision NaN. +*----------------------------------------------------------------------------*/ +extern const float64 float64_default_nan; + +/*---------------------------------------------------------------------------- +| Software IEC/IEEE extended double-precision conversion routines. +*----------------------------------------------------------------------------*/ +int32 floatx80_to_int32(floatx80, float_status *status); +int32 floatx80_to_int32_round_to_zero(floatx80, float_status *status); +int64 floatx80_to_int64(floatx80, float_status *status); +int64 floatx80_to_int64_round_to_zero(floatx80, float_status *status); +float32 floatx80_to_float32(floatx80, float_status *status); +float64 floatx80_to_float64(floatx80, float_status *status); +float128 floatx80_to_float128(floatx80, float_status *status); + +/*---------------------------------------------------------------------------- +| Software IEC/IEEE extended double-precision operations. +*----------------------------------------------------------------------------*/ +floatx80 floatx80_round_to_int(floatx80, float_status *status); +floatx80 floatx80_add(floatx80, floatx80, float_status *status); +floatx80 floatx80_sub(floatx80, floatx80, float_status *status); +floatx80 floatx80_mul(floatx80, floatx80, float_status *status); +floatx80 floatx80_div(floatx80, floatx80, float_status *status); +floatx80 floatx80_rem(floatx80, floatx80, float_status *status); +floatx80 floatx80_sqrt(floatx80, float_status *status); +int floatx80_eq(floatx80, floatx80, float_status *status); +int floatx80_le(floatx80, floatx80, float_status *status); +int floatx80_lt(floatx80, floatx80, float_status *status); +int floatx80_unordered(floatx80, floatx80, float_status *status); +int floatx80_eq_quiet(floatx80, floatx80, float_status *status); +int floatx80_le_quiet(floatx80, floatx80, float_status *status); +int floatx80_lt_quiet(floatx80, floatx80, float_status *status); +int floatx80_unordered_quiet(floatx80, floatx80, float_status *status); +int floatx80_compare(floatx80, floatx80, float_status *status); +int floatx80_compare_quiet(floatx80, floatx80, float_status *status); +int floatx80_is_quiet_nan( floatx80 ); +int floatx80_is_signaling_nan( floatx80 ); +floatx80 floatx80_maybe_silence_nan( floatx80 ); +floatx80 floatx80_scalbn(floatx80, int, float_status *status); + +static inline floatx80 floatx80_abs(floatx80 a) +{ + a.high &= 0x7fff; + return a; +} + +static inline floatx80 floatx80_chs(floatx80 a) +{ + a.high ^= 0x8000; + return a; +} + +static inline int floatx80_is_infinity(floatx80 a) +{ + return (a.high & 0x7fff) == 0x7fff && a.low == 0x8000000000000000LL; +} + +static inline int floatx80_is_neg(floatx80 a) +{ + return a.high >> 15; +} + +static inline int floatx80_is_zero(floatx80 a) +{ + return (a.high & 0x7fff) == 0 && a.low == 0; +} + +static inline int floatx80_is_zero_or_denormal(floatx80 a) +{ + return (a.high & 0x7fff) == 0; +} + +static inline int floatx80_is_any_nan(floatx80 a) +{ + return ((a.high & 0x7fff) == 0x7fff) && (a.low<<1); +} + +#define floatx80_zero make_floatx80(0x0000, 0x0000000000000000LL) +#define floatx80_one make_floatx80(0x3fff, 0x8000000000000000LL) +#define floatx80_ln2 make_floatx80(0x3ffe, 0xb17217f7d1cf79acLL) +#define floatx80_pi make_floatx80(0x4000, 0xc90fdaa22168c235LL) +#define floatx80_half make_floatx80(0x3ffe, 0x8000000000000000LL) +#define floatx80_infinity make_floatx80(0x7fff, 0x8000000000000000LL) + +/*---------------------------------------------------------------------------- +| The pattern for a default generated extended double-precision NaN. +*----------------------------------------------------------------------------*/ +extern const floatx80 floatx80_default_nan; + +/*---------------------------------------------------------------------------- +| Software IEC/IEEE quadruple-precision conversion routines. +*----------------------------------------------------------------------------*/ +int32 float128_to_int32(float128, float_status *status); +int32 float128_to_int32_round_to_zero(float128, float_status *status); +int64 float128_to_int64(float128, float_status *status); +int64 float128_to_int64_round_to_zero(float128, float_status *status); +float32 float128_to_float32(float128, float_status *status); +float64 float128_to_float64(float128, float_status *status); +floatx80 float128_to_floatx80(float128, float_status *status); + +/*---------------------------------------------------------------------------- +| Software IEC/IEEE quadruple-precision operations. +*----------------------------------------------------------------------------*/ +float128 float128_round_to_int(float128, float_status *status); +float128 float128_add(float128, float128, float_status *status); +float128 float128_sub(float128, float128, float_status *status); +float128 float128_mul(float128, float128, float_status *status); +float128 float128_div(float128, float128, float_status *status); +float128 float128_rem(float128, float128, float_status *status); +float128 float128_sqrt(float128, float_status *status); +int float128_eq(float128, float128, float_status *status); +int float128_le(float128, float128, float_status *status); +int float128_lt(float128, float128, float_status *status); +int float128_unordered(float128, float128, float_status *status); +int float128_eq_quiet(float128, float128, float_status *status); +int float128_le_quiet(float128, float128, float_status *status); +int float128_lt_quiet(float128, float128, float_status *status); +int float128_unordered_quiet(float128, float128, float_status *status); +int float128_compare(float128, float128, float_status *status); +int float128_compare_quiet(float128, float128, float_status *status); +int float128_is_quiet_nan( float128 ); +int float128_is_signaling_nan( float128 ); +float128 float128_maybe_silence_nan( float128 ); +float128 float128_scalbn(float128, int, float_status *status); + +static inline float128 float128_abs(float128 a) +{ + a.high &= 0x7fffffffffffffffLL; + return a; +} + +static inline float128 float128_chs(float128 a) +{ + a.high ^= 0x8000000000000000LL; + return a; +} + +static inline int float128_is_infinity(float128 a) +{ + return (a.high & 0x7fffffffffffffffLL) == 0x7fff000000000000LL && a.low == 0; +} + +static inline int float128_is_neg(float128 a) +{ + return a.high >> 63; +} + +static inline int float128_is_zero(float128 a) +{ + return (a.high & 0x7fffffffffffffffLL) == 0 && a.low == 0; +} + +static inline int float128_is_zero_or_denormal(float128 a) +{ + return (a.high & 0x7fff000000000000LL) == 0; +} + +static inline int float128_is_any_nan(float128 a) +{ + return ((a.high >> 48) & 0x7fff) == 0x7fff && + ((a.low != 0) || ((a.high & 0xffffffffffffLL) != 0)); +} + +#define float128_zero make_float128(0, 0) + +/*---------------------------------------------------------------------------- +| The pattern for a default generated quadruple-precision NaN. +*----------------------------------------------------------------------------*/ +extern const float128 float128_default_nan; + +#endif /* !SOFTFLOAT_H */ |
