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Diffstat (limited to 'include/fpu/softfloat.h')
| -rw-r--r-- | include/fpu/softfloat.h | 638 |
1 files changed, 638 insertions, 0 deletions
diff --git a/include/fpu/softfloat.h b/include/fpu/softfloat.h new file mode 100644 index 0000000000..0946f0739d --- /dev/null +++ b/include/fpu/softfloat.h @@ -0,0 +1,638 @@ +/* + * QEMU float support + * + * Derived from SoftFloat. + */ + +/*============================================================================ + +This C header file is part of the SoftFloat IEC/IEEE Floating-point Arithmetic +Package, Release 2b. + +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://www.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 ALL LOSSES, +COSTS, OR OTHER PROBLEMS THEY INCUR DUE TO THE SOFTWARE, AND WHO FURTHERMORE +EFFECTIVELY INDEMNIFY JOHN HAUSER AND THE INTERNATIONAL COMPUTER SCIENCE +INSTITUTE (possibly via similar legal warning) AGAINST ALL LOSSES, COSTS, OR +OTHER PROBLEMS INCURRED BY THEIR CUSTOMERS AND CLIENTS DUE TO THE SOFTWARE. + +Derivative works are acceptable, even for commercial purposes, so long as +(1) the source code for the derivative work includes prominent notice that +the work is derivative, and (2) the source code includes prominent notice with +these four paragraphs for those parts of this code that are retained. + +=============================================================================*/ + +#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 +#define INLINE static inline + +#define STATUS_PARAM , float_status *status +#define STATUS(field) status->field +#define STATUS_VAR , status + +/*---------------------------------------------------------------------------- +| 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 +}; + +/*---------------------------------------------------------------------------- +| 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; + +void set_float_rounding_mode(int val STATUS_PARAM); +void set_float_exception_flags(int val STATUS_PARAM); +INLINE void set_float_detect_tininess(int val STATUS_PARAM) +{ + STATUS(float_detect_tininess) = val; +} +INLINE void set_flush_to_zero(flag val STATUS_PARAM) +{ + STATUS(flush_to_zero) = val; +} +INLINE void set_flush_inputs_to_zero(flag val STATUS_PARAM) +{ + STATUS(flush_inputs_to_zero) = val; +} +INLINE void set_default_nan_mode(flag val STATUS_PARAM) +{ + STATUS(default_nan_mode) = val; +} +INLINE int get_float_exception_flags(float_status *status) +{ + return STATUS(float_exception_flags); +} +void set_floatx80_rounding_precision(int val STATUS_PARAM); + +/*---------------------------------------------------------------------------- +| Routine to raise any or all of the software IEC/IEEE floating-point +| exception flags. +*----------------------------------------------------------------------------*/ +void float_raise( int8 flags STATUS_PARAM); + +/*---------------------------------------------------------------------------- +| 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. +*----------------------------------------------------------------------------*/ +enum { + float_muladd_negate_c = 1, + float_muladd_negate_product = 2, + float_muladd_negate_result = 4, +}; + +/*---------------------------------------------------------------------------- +| Software IEC/IEEE integer-to-floating-point conversion routines. +*----------------------------------------------------------------------------*/ +float32 int32_to_float32( int32 STATUS_PARAM ); +float64 int32_to_float64( int32 STATUS_PARAM ); +float32 uint32_to_float32( uint32 STATUS_PARAM ); +float64 uint32_to_float64( uint32 STATUS_PARAM ); +floatx80 int32_to_floatx80( int32 STATUS_PARAM ); +float128 int32_to_float128( int32 STATUS_PARAM ); +float32 int64_to_float32( int64 STATUS_PARAM ); +float32 uint64_to_float32( uint64 STATUS_PARAM ); +float64 int64_to_float64( int64 STATUS_PARAM ); +float64 uint64_to_float64( uint64 STATUS_PARAM ); +floatx80 int64_to_floatx80( int64 STATUS_PARAM ); +float128 int64_to_float128( int64 STATUS_PARAM ); + +/*---------------------------------------------------------------------------- +| Software half-precision conversion routines. +*----------------------------------------------------------------------------*/ +float16 float32_to_float16( float32, flag STATUS_PARAM ); +float32 float16_to_float32( float16, flag STATUS_PARAM ); + +/*---------------------------------------------------------------------------- +| Software half-precision operations. +*----------------------------------------------------------------------------*/ +int float16_is_quiet_nan( float16 ); +int float16_is_signaling_nan( float16 ); +float16 float16_maybe_silence_nan( float16 ); + +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_round_to_zero(float32 STATUS_PARAM); +uint_fast16_t float32_to_uint16_round_to_zero(float32 STATUS_PARAM); +int32 float32_to_int32( float32 STATUS_PARAM ); +int32 float32_to_int32_round_to_zero( float32 STATUS_PARAM ); +uint32 float32_to_uint32( float32 STATUS_PARAM ); +uint32 float32_to_uint32_round_to_zero( float32 STATUS_PARAM ); +int64 float32_to_int64( float32 STATUS_PARAM ); +int64 float32_to_int64_round_to_zero( float32 STATUS_PARAM ); +float64 float32_to_float64( float32 STATUS_PARAM ); +floatx80 float32_to_floatx80( float32 STATUS_PARAM ); +float128 float32_to_float128( float32 STATUS_PARAM ); + +/*---------------------------------------------------------------------------- +| Software IEC/IEEE single-precision operations. +*----------------------------------------------------------------------------*/ +float32 float32_round_to_int( float32 STATUS_PARAM ); +float32 float32_add( float32, float32 STATUS_PARAM ); +float32 float32_sub( float32, float32 STATUS_PARAM ); +float32 float32_mul( float32, float32 STATUS_PARAM ); +float32 float32_div( float32, float32 STATUS_PARAM ); +float32 float32_rem( float32, float32 STATUS_PARAM ); +float32 float32_muladd(float32, float32, float32, int STATUS_PARAM); +float32 float32_sqrt( float32 STATUS_PARAM ); +float32 float32_exp2( float32 STATUS_PARAM ); +float32 float32_log2( float32 STATUS_PARAM ); +int float32_eq( float32, float32 STATUS_PARAM ); +int float32_le( float32, float32 STATUS_PARAM ); +int float32_lt( float32, float32 STATUS_PARAM ); +int float32_unordered( float32, float32 STATUS_PARAM ); +int float32_eq_quiet( float32, float32 STATUS_PARAM ); +int float32_le_quiet( float32, float32 STATUS_PARAM ); +int float32_lt_quiet( float32, float32 STATUS_PARAM ); +int float32_unordered_quiet( float32, float32 STATUS_PARAM ); +int float32_compare( float32, float32 STATUS_PARAM ); +int float32_compare_quiet( float32, float32 STATUS_PARAM ); +float32 float32_min(float32, float32 STATUS_PARAM); +float32 float32_max(float32, float32 STATUS_PARAM); +int float32_is_quiet_nan( float32 ); +int float32_is_signaling_nan( float32 ); +float32 float32_maybe_silence_nan( float32 ); +float32 float32_scalbn( float32, int STATUS_PARAM ); + +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); +} + +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); +} + +INLINE int float32_is_infinity(float32 a) +{ + return (float32_val(a) & 0x7fffffff) == 0x7f800000; +} + +INLINE int float32_is_neg(float32 a) +{ + return float32_val(a) >> 31; +} + +INLINE int float32_is_zero(float32 a) +{ + return (float32_val(a) & 0x7fffffff) == 0; +} + +INLINE int float32_is_any_nan(float32 a) +{ + return ((float32_val(a) & ~(1 << 31)) > 0x7f800000UL); +} + +INLINE int float32_is_zero_or_denormal(float32 a) +{ + return (float32_val(a) & 0x7f800000) == 0; +} + +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_round_to_zero(float64 STATUS_PARAM); +uint_fast16_t float64_to_uint16_round_to_zero(float64 STATUS_PARAM); +int32 float64_to_int32( float64 STATUS_PARAM ); +int32 float64_to_int32_round_to_zero( float64 STATUS_PARAM ); +uint32 float64_to_uint32( float64 STATUS_PARAM ); +uint32 float64_to_uint32_round_to_zero( float64 STATUS_PARAM ); +int64 float64_to_int64( float64 STATUS_PARAM ); +int64 float64_to_int64_round_to_zero( float64 STATUS_PARAM ); +uint64 float64_to_uint64 (float64 a STATUS_PARAM); +uint64 float64_to_uint64_round_to_zero (float64 a STATUS_PARAM); +float32 float64_to_float32( float64 STATUS_PARAM ); +floatx80 float64_to_floatx80( float64 STATUS_PARAM ); +float128 float64_to_float128( float64 STATUS_PARAM ); + +/*---------------------------------------------------------------------------- +| Software IEC/IEEE double-precision operations. +*----------------------------------------------------------------------------*/ +float64 float64_round_to_int( float64 STATUS_PARAM ); +float64 float64_trunc_to_int( float64 STATUS_PARAM ); +float64 float64_add( float64, float64 STATUS_PARAM ); +float64 float64_sub( float64, float64 STATUS_PARAM ); +float64 float64_mul( float64, float64 STATUS_PARAM ); +float64 float64_div( float64, float64 STATUS_PARAM ); +float64 float64_rem( float64, float64 STATUS_PARAM ); +float64 float64_muladd(float64, float64, float64, int STATUS_PARAM); +float64 float64_sqrt( float64 STATUS_PARAM ); +float64 float64_log2( float64 STATUS_PARAM ); +int float64_eq( float64, float64 STATUS_PARAM ); +int float64_le( float64, float64 STATUS_PARAM ); +int float64_lt( float64, float64 STATUS_PARAM ); +int float64_unordered( float64, float64 STATUS_PARAM ); +int float64_eq_quiet( float64, float64 STATUS_PARAM ); +int float64_le_quiet( float64, float64 STATUS_PARAM ); +int float64_lt_quiet( float64, float64 STATUS_PARAM ); +int float64_unordered_quiet( float64, float64 STATUS_PARAM ); +int float64_compare( float64, float64 STATUS_PARAM ); +int float64_compare_quiet( float64, float64 STATUS_PARAM ); +float64 float64_min(float64, float64 STATUS_PARAM); +float64 float64_max(float64, float64 STATUS_PARAM); +int float64_is_quiet_nan( float64 a ); +int float64_is_signaling_nan( float64 ); +float64 float64_maybe_silence_nan( float64 ); +float64 float64_scalbn( float64, int STATUS_PARAM ); + +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); +} + +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); +} + +INLINE int float64_is_infinity(float64 a) +{ + return (float64_val(a) & 0x7fffffffffffffffLL ) == 0x7ff0000000000000LL; +} + +INLINE int float64_is_neg(float64 a) +{ + return float64_val(a) >> 63; +} + +INLINE int float64_is_zero(float64 a) +{ + return (float64_val(a) & 0x7fffffffffffffffLL) == 0; +} + +INLINE int float64_is_any_nan(float64 a) +{ + return ((float64_val(a) & ~(1ULL << 63)) > 0x7ff0000000000000ULL); +} + +INLINE int float64_is_zero_or_denormal(float64 a) +{ + return (float64_val(a) & 0x7ff0000000000000LL) == 0; +} + +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 STATUS_PARAM ); +int32 floatx80_to_int32_round_to_zero( floatx80 STATUS_PARAM ); +int64 floatx80_to_int64( floatx80 STATUS_PARAM ); +int64 floatx80_to_int64_round_to_zero( floatx80 STATUS_PARAM ); +float32 floatx80_to_float32( floatx80 STATUS_PARAM ); +float64 floatx80_to_float64( floatx80 STATUS_PARAM ); +float128 floatx80_to_float128( floatx80 STATUS_PARAM ); + +/*---------------------------------------------------------------------------- +| Software IEC/IEEE extended double-precision operations. +*----------------------------------------------------------------------------*/ +floatx80 floatx80_round_to_int( floatx80 STATUS_PARAM ); +floatx80 floatx80_add( floatx80, floatx80 STATUS_PARAM ); +floatx80 floatx80_sub( floatx80, floatx80 STATUS_PARAM ); +floatx80 floatx80_mul( floatx80, floatx80 STATUS_PARAM ); +floatx80 floatx80_div( floatx80, floatx80 STATUS_PARAM ); +floatx80 floatx80_rem( floatx80, floatx80 STATUS_PARAM ); +floatx80 floatx80_sqrt( floatx80 STATUS_PARAM ); +int floatx80_eq( floatx80, floatx80 STATUS_PARAM ); +int floatx80_le( floatx80, floatx80 STATUS_PARAM ); +int floatx80_lt( floatx80, floatx80 STATUS_PARAM ); +int floatx80_unordered( floatx80, floatx80 STATUS_PARAM ); +int floatx80_eq_quiet( floatx80, floatx80 STATUS_PARAM ); +int floatx80_le_quiet( floatx80, floatx80 STATUS_PARAM ); +int floatx80_lt_quiet( floatx80, floatx80 STATUS_PARAM ); +int floatx80_unordered_quiet( floatx80, floatx80 STATUS_PARAM ); +int floatx80_compare( floatx80, floatx80 STATUS_PARAM ); +int floatx80_compare_quiet( floatx80, floatx80 STATUS_PARAM ); +int floatx80_is_quiet_nan( floatx80 ); +int floatx80_is_signaling_nan( floatx80 ); +floatx80 floatx80_maybe_silence_nan( floatx80 ); +floatx80 floatx80_scalbn( floatx80, int STATUS_PARAM ); + +INLINE floatx80 floatx80_abs(floatx80 a) +{ + a.high &= 0x7fff; + return a; +} + +INLINE floatx80 floatx80_chs(floatx80 a) +{ + a.high ^= 0x8000; + return a; +} + +INLINE int floatx80_is_infinity(floatx80 a) +{ + return (a.high & 0x7fff) == 0x7fff && a.low == 0x8000000000000000LL; +} + +INLINE int floatx80_is_neg(floatx80 a) +{ + return a.high >> 15; +} + +INLINE int floatx80_is_zero(floatx80 a) +{ + return (a.high & 0x7fff) == 0 && a.low == 0; +} + +INLINE int floatx80_is_zero_or_denormal(floatx80 a) +{ + return (a.high & 0x7fff) == 0; +} + +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 STATUS_PARAM ); +int32 float128_to_int32_round_to_zero( float128 STATUS_PARAM ); +int64 float128_to_int64( float128 STATUS_PARAM ); +int64 float128_to_int64_round_to_zero( float128 STATUS_PARAM ); +float32 float128_to_float32( float128 STATUS_PARAM ); +float64 float128_to_float64( float128 STATUS_PARAM ); +floatx80 float128_to_floatx80( float128 STATUS_PARAM ); + +/*---------------------------------------------------------------------------- +| Software IEC/IEEE quadruple-precision operations. +*----------------------------------------------------------------------------*/ +float128 float128_round_to_int( float128 STATUS_PARAM ); +float128 float128_add( float128, float128 STATUS_PARAM ); +float128 float128_sub( float128, float128 STATUS_PARAM ); +float128 float128_mul( float128, float128 STATUS_PARAM ); +float128 float128_div( float128, float128 STATUS_PARAM ); +float128 float128_rem( float128, float128 STATUS_PARAM ); +float128 float128_sqrt( float128 STATUS_PARAM ); +int float128_eq( float128, float128 STATUS_PARAM ); +int float128_le( float128, float128 STATUS_PARAM ); +int float128_lt( float128, float128 STATUS_PARAM ); +int float128_unordered( float128, float128 STATUS_PARAM ); +int float128_eq_quiet( float128, float128 STATUS_PARAM ); +int float128_le_quiet( float128, float128 STATUS_PARAM ); +int float128_lt_quiet( float128, float128 STATUS_PARAM ); +int float128_unordered_quiet( float128, float128 STATUS_PARAM ); +int float128_compare( float128, float128 STATUS_PARAM ); +int float128_compare_quiet( float128, float128 STATUS_PARAM ); +int float128_is_quiet_nan( float128 ); +int float128_is_signaling_nan( float128 ); +float128 float128_maybe_silence_nan( float128 ); +float128 float128_scalbn( float128, int STATUS_PARAM ); + +INLINE float128 float128_abs(float128 a) +{ + a.high &= 0x7fffffffffffffffLL; + return a; +} + +INLINE float128 float128_chs(float128 a) +{ + a.high ^= 0x8000000000000000LL; + return a; +} + +INLINE int float128_is_infinity(float128 a) +{ + return (a.high & 0x7fffffffffffffffLL) == 0x7fff000000000000LL && a.low == 0; +} + +INLINE int float128_is_neg(float128 a) +{ + return a.high >> 63; +} + +INLINE int float128_is_zero(float128 a) +{ + return (a.high & 0x7fffffffffffffffLL) == 0 && a.low == 0; +} + +INLINE int float128_is_zero_or_denormal(float128 a) +{ + return (a.high & 0x7fff000000000000LL) == 0; +} + +INLINE int float128_is_any_nan(float128 a) +{ + return ((a.high >> 48) & 0x7fff) == 0x7fff && + ((a.low != 0) || ((a.high & 0xffffffffffffLL) != 0)); +} + +/*---------------------------------------------------------------------------- +| The pattern for a default generated quadruple-precision NaN. +*----------------------------------------------------------------------------*/ +extern const float128 float128_default_nan; + +#endif /* !SOFTFLOAT_H */ |