root / fpu / softfloat.h @ 87b8cc3c
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/*
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* QEMU float support
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*
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* Derived from SoftFloat.
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*/
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/*============================================================================
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This C header file is part of the SoftFloat IEC/IEEE Floating-point Arithmetic
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Package, Release 2b.
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Written by John R. Hauser. This work was made possible in part by the
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International Computer Science Institute, located at Suite 600, 1947 Center
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Street, Berkeley, California 94704. Funding was partially provided by the
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National Science Foundation under grant MIP-9311980. The original version
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of this code was written as part of a project to build a fixed-point vector
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processor in collaboration with the University of California at Berkeley,
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overseen by Profs. Nelson Morgan and John Wawrzynek. More information
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is available through the Web page `http://www.cs.berkeley.edu/~jhauser/
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arithmetic/SoftFloat.html'.
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THIS SOFTWARE IS DISTRIBUTED AS IS, FOR FREE. Although reasonable effort has
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been made to avoid it, THIS SOFTWARE MAY CONTAIN FAULTS THAT WILL AT TIMES
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RESULT IN INCORRECT BEHAVIOR. USE OF THIS SOFTWARE IS RESTRICTED TO PERSONS
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AND ORGANIZATIONS WHO CAN AND WILL TAKE FULL RESPONSIBILITY FOR ALL LOSSES,
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COSTS, OR OTHER PROBLEMS THEY INCUR DUE TO THE SOFTWARE, AND WHO FURTHERMORE
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EFFECTIVELY INDEMNIFY JOHN HAUSER AND THE INTERNATIONAL COMPUTER SCIENCE
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INSTITUTE (possibly via similar legal warning) AGAINST ALL LOSSES, COSTS, OR
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OTHER PROBLEMS INCURRED BY THEIR CUSTOMERS AND CLIENTS DUE TO THE SOFTWARE.
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Derivative works are acceptable, even for commercial purposes, so long as
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(1) the source code for the derivative work includes prominent notice that
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the work is derivative, and (2) the source code includes prominent notice with
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these four paragraphs for those parts of this code that are retained.
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=============================================================================*/
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#ifndef SOFTFLOAT_H
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#define SOFTFLOAT_H
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#if defined(CONFIG_SOLARIS) && defined(CONFIG_NEEDS_LIBSUNMATH)
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#include <sunmath.h> |
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#endif
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#include <inttypes.h> |
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#include "config.h" |
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/*----------------------------------------------------------------------------
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| Each of the following `typedef's defines the most convenient type that holds
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| integers of at least as many bits as specified. For example, `uint8' should
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| be the most convenient type that can hold unsigned integers of as many as
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| 8 bits. The `flag' type must be able to hold either a 0 or 1. For most
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| implementations of C, `flag', `uint8', and `int8' should all be `typedef'ed
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| to the same as `int'.
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*----------------------------------------------------------------------------*/
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typedef uint8_t flag;
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typedef uint8_t uint8;
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typedef int8_t int8;
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#ifndef _AIX
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typedef int uint16; |
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typedef int int16; |
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#endif
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typedef unsigned int uint32; |
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typedef signed int int32; |
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typedef uint64_t uint64;
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typedef int64_t int64;
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/*----------------------------------------------------------------------------
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| Each of the following `typedef's defines a type that holds integers
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| of _exactly_ the number of bits specified. For instance, for most
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| implementation of C, `bits16' and `sbits16' should be `typedef'ed to
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| `unsigned short int' and `signed short int' (or `short int'), respectively.
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*----------------------------------------------------------------------------*/
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typedef uint8_t bits8;
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typedef int8_t sbits8;
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typedef uint16_t bits16;
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typedef int16_t sbits16;
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typedef uint32_t bits32;
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typedef int32_t sbits32;
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typedef uint64_t bits64;
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typedef int64_t sbits64;
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#define LIT64( a ) a##LL |
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#define INLINE static inline |
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#if defined(TARGET_MIPS) || defined(TARGET_SH4)
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#define SNAN_BIT_IS_ONE 1 |
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#else
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#define SNAN_BIT_IS_ONE 0 |
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#endif
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/*----------------------------------------------------------------------------
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| The macro `FLOATX80' must be defined to enable the extended double-precision
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| floating-point format `floatx80'. If this macro is not defined, the
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| `floatx80' type will not be defined, and none of the functions that either
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| input or output the `floatx80' type will be defined. The same applies to
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| the `FLOAT128' macro and the quadruple-precision format `float128'.
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*----------------------------------------------------------------------------*/
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#ifdef CONFIG_SOFTFLOAT
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/* bit exact soft float support */
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#define FLOATX80
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#define FLOAT128
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#else
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/* native float support */
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#if (defined(__i386__) || defined(__x86_64__)) && !defined(CONFIG_BSD)
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#define FLOATX80
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#endif
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#endif /* !CONFIG_SOFTFLOAT */ |
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#define STATUS_PARAM , float_status *status
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#define STATUS(field) status->field
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#define STATUS_VAR , status
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/*----------------------------------------------------------------------------
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| Software IEC/IEEE floating-point ordering relations
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*----------------------------------------------------------------------------*/
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enum {
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float_relation_less = -1,
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float_relation_equal = 0,
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float_relation_greater = 1,
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float_relation_unordered = 2
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}; |
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#ifdef CONFIG_SOFTFLOAT
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/*----------------------------------------------------------------------------
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| Software IEC/IEEE floating-point types.
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*----------------------------------------------------------------------------*/
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/* Use structures for soft-float types. This prevents accidentally mixing
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them with native int/float types. A sufficiently clever compiler and
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sane ABI should be able to see though these structs. However
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x86/gcc 3.x seems to struggle a bit, so leave them disabled by default. */
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//#define USE_SOFTFLOAT_STRUCT_TYPES
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#ifdef USE_SOFTFLOAT_STRUCT_TYPES
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typedef struct { |
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uint16_t v; |
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} float16; |
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#define float16_val(x) (((float16)(x)).v)
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#define make_float16(x) __extension__ ({ float16 f16_val = {x}; f16_val; })
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#define const_float16(x) { x }
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typedef struct { |
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uint32_t v; |
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} float32; |
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/* The cast ensures an error if the wrong type is passed. */
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#define float32_val(x) (((float32)(x)).v)
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#define make_float32(x) __extension__ ({ float32 f32_val = {x}; f32_val; })
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#define const_float32(x) { x }
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typedef struct { |
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uint64_t v; |
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} float64; |
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#define float64_val(x) (((float64)(x)).v)
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#define make_float64(x) __extension__ ({ float64 f64_val = {x}; f64_val; })
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#define const_float64(x) { x }
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#else
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typedef uint16_t float16;
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typedef uint32_t float32;
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typedef uint64_t float64;
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#define float16_val(x) (x)
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#define float32_val(x) (x)
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#define float64_val(x) (x)
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#define make_float16(x) (x)
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#define make_float32(x) (x)
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#define make_float64(x) (x)
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#define const_float16(x) (x)
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#define const_float32(x) (x)
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#define const_float64(x) (x)
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#endif
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#ifdef FLOATX80
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typedef struct { |
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uint64_t low; |
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uint16_t high; |
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} floatx80; |
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#endif
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#ifdef FLOAT128
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typedef struct { |
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#ifdef HOST_WORDS_BIGENDIAN
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uint64_t high, low; |
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#else
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uint64_t low, high; |
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#endif
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} float128; |
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#endif
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/*----------------------------------------------------------------------------
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| Software IEC/IEEE floating-point underflow tininess-detection mode.
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*----------------------------------------------------------------------------*/
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enum {
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float_tininess_after_rounding = 0,
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float_tininess_before_rounding = 1
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}; |
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/*----------------------------------------------------------------------------
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| Software IEC/IEEE floating-point rounding mode.
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*----------------------------------------------------------------------------*/
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enum {
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float_round_nearest_even = 0,
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float_round_down = 1,
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float_round_up = 2,
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float_round_to_zero = 3
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}; |
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/*----------------------------------------------------------------------------
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| Software IEC/IEEE floating-point exception flags.
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*----------------------------------------------------------------------------*/
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enum {
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float_flag_invalid = 1,
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float_flag_divbyzero = 4,
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float_flag_overflow = 8,
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float_flag_underflow = 16,
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float_flag_inexact = 32,
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float_flag_input_denormal = 64
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}; |
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typedef struct float_status { |
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signed char float_detect_tininess; |
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signed char float_rounding_mode; |
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signed char float_exception_flags; |
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#ifdef FLOATX80
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signed char floatx80_rounding_precision; |
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#endif
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/* should denormalised results go to zero and set the inexact flag? */
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flag flush_to_zero; |
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/* should denormalised inputs go to zero and set the input_denormal flag? */
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flag flush_inputs_to_zero; |
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flag default_nan_mode; |
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} float_status; |
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void set_float_rounding_mode(int val STATUS_PARAM); |
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void set_float_exception_flags(int val STATUS_PARAM); |
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INLINE void set_flush_to_zero(flag val STATUS_PARAM)
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{ |
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STATUS(flush_to_zero) = val; |
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} |
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INLINE void set_flush_inputs_to_zero(flag val STATUS_PARAM)
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{ |
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STATUS(flush_inputs_to_zero) = val; |
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} |
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INLINE void set_default_nan_mode(flag val STATUS_PARAM)
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{ |
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STATUS(default_nan_mode) = val; |
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} |
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INLINE int get_float_exception_flags(float_status *status)
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{ |
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return STATUS(float_exception_flags);
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} |
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#ifdef FLOATX80
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void set_floatx80_rounding_precision(int val STATUS_PARAM); |
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#endif
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/*----------------------------------------------------------------------------
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| Routine to raise any or all of the software IEC/IEEE floating-point
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| exception flags.
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*----------------------------------------------------------------------------*/
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void float_raise( int8 flags STATUS_PARAM);
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/*----------------------------------------------------------------------------
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| Software IEC/IEEE integer-to-floating-point conversion routines.
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*----------------------------------------------------------------------------*/
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float32 int32_to_float32( int32 STATUS_PARAM ); |
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float64 int32_to_float64( int32 STATUS_PARAM ); |
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float32 uint32_to_float32( unsigned int STATUS_PARAM ); |
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float64 uint32_to_float64( unsigned int STATUS_PARAM ); |
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#ifdef FLOATX80
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floatx80 int32_to_floatx80( int32 STATUS_PARAM ); |
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#endif
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#ifdef FLOAT128
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float128 int32_to_float128( int32 STATUS_PARAM ); |
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#endif
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float32 int64_to_float32( int64 STATUS_PARAM ); |
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float32 uint64_to_float32( uint64 STATUS_PARAM ); |
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float64 int64_to_float64( int64 STATUS_PARAM ); |
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float64 uint64_to_float64( uint64 STATUS_PARAM ); |
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#ifdef FLOATX80
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floatx80 int64_to_floatx80( int64 STATUS_PARAM ); |
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#endif
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#ifdef FLOAT128
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float128 int64_to_float128( int64 STATUS_PARAM ); |
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#endif
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/*----------------------------------------------------------------------------
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| Software half-precision conversion routines.
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*----------------------------------------------------------------------------*/
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float16 float32_to_float16( float32, flag STATUS_PARAM ); |
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float32 float16_to_float32( float16, flag STATUS_PARAM ); |
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/*----------------------------------------------------------------------------
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| Software half-precision operations.
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*----------------------------------------------------------------------------*/
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int float16_is_quiet_nan( float16 );
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int float16_is_signaling_nan( float16 );
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float16 float16_maybe_silence_nan( float16 ); |
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/*----------------------------------------------------------------------------
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| The pattern for a default generated half-precision NaN.
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*----------------------------------------------------------------------------*/
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#if defined(TARGET_ARM)
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#define float16_default_nan make_float16(0x7E00) |
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#elif SNAN_BIT_IS_ONE
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#define float16_default_nan make_float16(0x7DFF) |
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#else
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#define float16_default_nan make_float16(0xFE00) |
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#endif
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/*----------------------------------------------------------------------------
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| Software IEC/IEEE single-precision conversion routines.
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*----------------------------------------------------------------------------*/
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int16 float32_to_int16_round_to_zero( float32 STATUS_PARAM ); |
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unsigned int float32_to_uint16_round_to_zero( float32 STATUS_PARAM ); |
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int32 float32_to_int32( float32 STATUS_PARAM ); |
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int32 float32_to_int32_round_to_zero( float32 STATUS_PARAM ); |
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uint32 float32_to_uint32( float32 STATUS_PARAM ); |
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uint32 float32_to_uint32_round_to_zero( float32 STATUS_PARAM ); |
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int64 float32_to_int64( float32 STATUS_PARAM ); |
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int64 float32_to_int64_round_to_zero( float32 STATUS_PARAM ); |
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float64 float32_to_float64( float32 STATUS_PARAM ); |
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#ifdef FLOATX80
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floatx80 float32_to_floatx80( float32 STATUS_PARAM ); |
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#endif
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#ifdef FLOAT128
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float128 float32_to_float128( float32 STATUS_PARAM ); |
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#endif
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/*----------------------------------------------------------------------------
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| Software IEC/IEEE single-precision operations.
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*----------------------------------------------------------------------------*/
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float32 float32_round_to_int( float32 STATUS_PARAM ); |
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float32 float32_add( float32, float32 STATUS_PARAM ); |
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float32 float32_sub( float32, float32 STATUS_PARAM ); |
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float32 float32_mul( float32, float32 STATUS_PARAM ); |
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float32 float32_div( float32, float32 STATUS_PARAM ); |
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float32 float32_rem( float32, float32 STATUS_PARAM ); |
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float32 float32_sqrt( float32 STATUS_PARAM ); |
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float32 float32_exp2( float32 STATUS_PARAM ); |
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float32 float32_log2( float32 STATUS_PARAM ); |
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int float32_eq( float32, float32 STATUS_PARAM );
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int float32_le( float32, float32 STATUS_PARAM );
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int float32_lt( float32, float32 STATUS_PARAM );
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int float32_eq_signaling( float32, float32 STATUS_PARAM );
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int float32_le_quiet( float32, float32 STATUS_PARAM );
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int float32_lt_quiet( float32, float32 STATUS_PARAM );
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int float32_compare( float32, float32 STATUS_PARAM );
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int float32_compare_quiet( float32, float32 STATUS_PARAM );
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int float32_is_quiet_nan( float32 );
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int float32_is_signaling_nan( float32 );
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float32 float32_maybe_silence_nan( float32 ); |
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float32 float32_scalbn( float32, int STATUS_PARAM );
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INLINE float32 float32_abs(float32 a) |
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{ |
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/* Note that abs does *not* handle NaN specially, nor does
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* it flush denormal inputs to zero.
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*/
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return make_float32(float32_val(a) & 0x7fffffff); |
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} |
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INLINE float32 float32_chs(float32 a) |
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{ |
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/* Note that chs does *not* handle NaN specially, nor does
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* it flush denormal inputs to zero.
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*/
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return make_float32(float32_val(a) ^ 0x80000000); |
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} |
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INLINE int float32_is_infinity(float32 a)
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{ |
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return (float32_val(a) & 0x7fffffff) == 0x7f800000; |
366 |
} |
367 |
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INLINE int float32_is_neg(float32 a)
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{ |
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return float32_val(a) >> 31; |
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} |
372 |
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INLINE int float32_is_zero(float32 a)
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{ |
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return (float32_val(a) & 0x7fffffff) == 0; |
376 |
} |
377 |
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INLINE int float32_is_any_nan(float32 a)
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{ |
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return ((float32_val(a) & ~(1 << 31)) > 0x7f800000UL); |
381 |
} |
382 |
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INLINE int float32_is_zero_or_denormal(float32 a)
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{ |
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return (float32_val(a) & 0x7f800000) == 0; |
386 |
} |
387 |
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INLINE float32 float32_set_sign(float32 a, int sign)
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{ |
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return make_float32((float32_val(a) & 0x7fffffff) | (sign << 31)); |
391 |
} |
392 |
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#define float32_zero make_float32(0) |
394 |
#define float32_one make_float32(0x3f800000) |
395 |
#define float32_ln2 make_float32(0x3f317218) |
396 |
#define float32_half make_float32(0x3f000000) |
397 |
#define float32_infinity make_float32(0x7f800000) |
398 |
|
399 |
|
400 |
/*----------------------------------------------------------------------------
|
401 |
| The pattern for a default generated single-precision NaN.
|
402 |
*----------------------------------------------------------------------------*/
|
403 |
#if defined(TARGET_SPARC)
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#define float32_default_nan make_float32(0x7FFFFFFF) |
405 |
#elif defined(TARGET_PPC) || defined(TARGET_ARM) || defined(TARGET_ALPHA)
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406 |
#define float32_default_nan make_float32(0x7FC00000) |
407 |
#elif SNAN_BIT_IS_ONE
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#define float32_default_nan make_float32(0x7FBFFFFF) |
409 |
#else
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#define float32_default_nan make_float32(0xFFC00000) |
411 |
#endif
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|
413 |
/*----------------------------------------------------------------------------
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414 |
| Software IEC/IEEE double-precision conversion routines.
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415 |
*----------------------------------------------------------------------------*/
|
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int16 float64_to_int16_round_to_zero( float64 STATUS_PARAM ); |
417 |
unsigned int float64_to_uint16_round_to_zero( float64 STATUS_PARAM ); |
418 |
int32 float64_to_int32( float64 STATUS_PARAM ); |
419 |
int32 float64_to_int32_round_to_zero( float64 STATUS_PARAM ); |
420 |
uint32 float64_to_uint32( float64 STATUS_PARAM ); |
421 |
uint32 float64_to_uint32_round_to_zero( float64 STATUS_PARAM ); |
422 |
int64 float64_to_int64( float64 STATUS_PARAM ); |
423 |
int64 float64_to_int64_round_to_zero( float64 STATUS_PARAM ); |
424 |
uint64 float64_to_uint64 (float64 a STATUS_PARAM); |
425 |
uint64 float64_to_uint64_round_to_zero (float64 a STATUS_PARAM); |
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float32 float64_to_float32( float64 STATUS_PARAM ); |
427 |
#ifdef FLOATX80
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floatx80 float64_to_floatx80( float64 STATUS_PARAM ); |
429 |
#endif
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#ifdef FLOAT128
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float128 float64_to_float128( float64 STATUS_PARAM ); |
432 |
#endif
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|
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/*----------------------------------------------------------------------------
|
435 |
| Software IEC/IEEE double-precision operations.
|
436 |
*----------------------------------------------------------------------------*/
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float64 float64_round_to_int( float64 STATUS_PARAM ); |
438 |
float64 float64_trunc_to_int( float64 STATUS_PARAM ); |
439 |
float64 float64_add( float64, float64 STATUS_PARAM ); |
440 |
float64 float64_sub( float64, float64 STATUS_PARAM ); |
441 |
float64 float64_mul( float64, float64 STATUS_PARAM ); |
442 |
float64 float64_div( float64, float64 STATUS_PARAM ); |
443 |
float64 float64_rem( float64, float64 STATUS_PARAM ); |
444 |
float64 float64_sqrt( float64 STATUS_PARAM ); |
445 |
float64 float64_log2( float64 STATUS_PARAM ); |
446 |
int float64_eq( float64, float64 STATUS_PARAM );
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447 |
int float64_le( float64, float64 STATUS_PARAM );
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448 |
int float64_lt( float64, float64 STATUS_PARAM );
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449 |
int float64_eq_signaling( float64, float64 STATUS_PARAM );
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450 |
int float64_le_quiet( float64, float64 STATUS_PARAM );
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451 |
int float64_lt_quiet( float64, float64 STATUS_PARAM );
|
452 |
int float64_compare( float64, float64 STATUS_PARAM );
|
453 |
int float64_compare_quiet( float64, float64 STATUS_PARAM );
|
454 |
int float64_is_quiet_nan( float64 a );
|
455 |
int float64_is_signaling_nan( float64 );
|
456 |
float64 float64_maybe_silence_nan( float64 ); |
457 |
float64 float64_scalbn( float64, int STATUS_PARAM );
|
458 |
|
459 |
INLINE float64 float64_abs(float64 a) |
460 |
{ |
461 |
/* Note that abs does *not* handle NaN specially, nor does
|
462 |
* it flush denormal inputs to zero.
|
463 |
*/
|
464 |
return make_float64(float64_val(a) & 0x7fffffffffffffffLL); |
465 |
} |
466 |
|
467 |
INLINE float64 float64_chs(float64 a) |
468 |
{ |
469 |
/* Note that chs does *not* handle NaN specially, nor does
|
470 |
* it flush denormal inputs to zero.
|
471 |
*/
|
472 |
return make_float64(float64_val(a) ^ 0x8000000000000000LL); |
473 |
} |
474 |
|
475 |
INLINE int float64_is_infinity(float64 a)
|
476 |
{ |
477 |
return (float64_val(a) & 0x7fffffffffffffffLL ) == 0x7ff0000000000000LL; |
478 |
} |
479 |
|
480 |
INLINE int float64_is_neg(float64 a)
|
481 |
{ |
482 |
return float64_val(a) >> 63; |
483 |
} |
484 |
|
485 |
INLINE int float64_is_zero(float64 a)
|
486 |
{ |
487 |
return (float64_val(a) & 0x7fffffffffffffffLL) == 0; |
488 |
} |
489 |
|
490 |
INLINE int float64_is_any_nan(float64 a)
|
491 |
{ |
492 |
return ((float64_val(a) & ~(1ULL << 63)) > 0x7ff0000000000000ULL); |
493 |
} |
494 |
|
495 |
INLINE float64 float64_set_sign(float64 a, int sign)
|
496 |
{ |
497 |
return make_float64((float64_val(a) & 0x7fffffffffffffffULL) |
498 |
| ((int64_t)sign << 63));
|
499 |
} |
500 |
|
501 |
#define float64_zero make_float64(0) |
502 |
#define float64_one make_float64(0x3ff0000000000000LL) |
503 |
#define float64_ln2 make_float64(0x3fe62e42fefa39efLL) |
504 |
#define float64_half make_float64(0x3fe0000000000000LL) |
505 |
#define float64_infinity make_float64(0x7ff0000000000000LL) |
506 |
|
507 |
/*----------------------------------------------------------------------------
|
508 |
| The pattern for a default generated double-precision NaN.
|
509 |
*----------------------------------------------------------------------------*/
|
510 |
#if defined(TARGET_SPARC)
|
511 |
#define float64_default_nan make_float64(LIT64( 0x7FFFFFFFFFFFFFFF )) |
512 |
#elif defined(TARGET_PPC) || defined(TARGET_ARM) || defined(TARGET_ALPHA)
|
513 |
#define float64_default_nan make_float64(LIT64( 0x7FF8000000000000 )) |
514 |
#elif SNAN_BIT_IS_ONE
|
515 |
#define float64_default_nan make_float64(LIT64( 0x7FF7FFFFFFFFFFFF )) |
516 |
#else
|
517 |
#define float64_default_nan make_float64(LIT64( 0xFFF8000000000000 )) |
518 |
#endif
|
519 |
|
520 |
#ifdef FLOATX80
|
521 |
|
522 |
/*----------------------------------------------------------------------------
|
523 |
| Software IEC/IEEE extended double-precision conversion routines.
|
524 |
*----------------------------------------------------------------------------*/
|
525 |
int32 floatx80_to_int32( floatx80 STATUS_PARAM ); |
526 |
int32 floatx80_to_int32_round_to_zero( floatx80 STATUS_PARAM ); |
527 |
int64 floatx80_to_int64( floatx80 STATUS_PARAM ); |
528 |
int64 floatx80_to_int64_round_to_zero( floatx80 STATUS_PARAM ); |
529 |
float32 floatx80_to_float32( floatx80 STATUS_PARAM ); |
530 |
float64 floatx80_to_float64( floatx80 STATUS_PARAM ); |
531 |
#ifdef FLOAT128
|
532 |
float128 floatx80_to_float128( floatx80 STATUS_PARAM ); |
533 |
#endif
|
534 |
|
535 |
/*----------------------------------------------------------------------------
|
536 |
| Software IEC/IEEE extended double-precision operations.
|
537 |
*----------------------------------------------------------------------------*/
|
538 |
floatx80 floatx80_round_to_int( floatx80 STATUS_PARAM ); |
539 |
floatx80 floatx80_add( floatx80, floatx80 STATUS_PARAM ); |
540 |
floatx80 floatx80_sub( floatx80, floatx80 STATUS_PARAM ); |
541 |
floatx80 floatx80_mul( floatx80, floatx80 STATUS_PARAM ); |
542 |
floatx80 floatx80_div( floatx80, floatx80 STATUS_PARAM ); |
543 |
floatx80 floatx80_rem( floatx80, floatx80 STATUS_PARAM ); |
544 |
floatx80 floatx80_sqrt( floatx80 STATUS_PARAM ); |
545 |
int floatx80_eq( floatx80, floatx80 STATUS_PARAM );
|
546 |
int floatx80_le( floatx80, floatx80 STATUS_PARAM );
|
547 |
int floatx80_lt( floatx80, floatx80 STATUS_PARAM );
|
548 |
int floatx80_eq_signaling( floatx80, floatx80 STATUS_PARAM );
|
549 |
int floatx80_le_quiet( floatx80, floatx80 STATUS_PARAM );
|
550 |
int floatx80_lt_quiet( floatx80, floatx80 STATUS_PARAM );
|
551 |
int floatx80_is_quiet_nan( floatx80 );
|
552 |
int floatx80_is_signaling_nan( floatx80 );
|
553 |
floatx80 floatx80_maybe_silence_nan( floatx80 ); |
554 |
floatx80 floatx80_scalbn( floatx80, int STATUS_PARAM );
|
555 |
|
556 |
INLINE floatx80 floatx80_abs(floatx80 a) |
557 |
{ |
558 |
a.high &= 0x7fff;
|
559 |
return a;
|
560 |
} |
561 |
|
562 |
INLINE floatx80 floatx80_chs(floatx80 a) |
563 |
{ |
564 |
a.high ^= 0x8000;
|
565 |
return a;
|
566 |
} |
567 |
|
568 |
INLINE int floatx80_is_infinity(floatx80 a)
|
569 |
{ |
570 |
return (a.high & 0x7fff) == 0x7fff && a.low == 0; |
571 |
} |
572 |
|
573 |
INLINE int floatx80_is_neg(floatx80 a)
|
574 |
{ |
575 |
return a.high >> 15; |
576 |
} |
577 |
|
578 |
INLINE int floatx80_is_zero(floatx80 a)
|
579 |
{ |
580 |
return (a.high & 0x7fff) == 0 && a.low == 0; |
581 |
} |
582 |
|
583 |
INLINE int floatx80_is_any_nan(floatx80 a)
|
584 |
{ |
585 |
return ((a.high & 0x7fff) == 0x7fff) && (a.low<<1); |
586 |
} |
587 |
|
588 |
/*----------------------------------------------------------------------------
|
589 |
| The pattern for a default generated extended double-precision NaN. The
|
590 |
| `high' and `low' values hold the most- and least-significant bits,
|
591 |
| respectively.
|
592 |
*----------------------------------------------------------------------------*/
|
593 |
#if SNAN_BIT_IS_ONE
|
594 |
#define floatx80_default_nan_high 0x7FFF |
595 |
#define floatx80_default_nan_low LIT64( 0xBFFFFFFFFFFFFFFF ) |
596 |
#else
|
597 |
#define floatx80_default_nan_high 0xFFFF |
598 |
#define floatx80_default_nan_low LIT64( 0xC000000000000000 ) |
599 |
#endif
|
600 |
|
601 |
#endif
|
602 |
|
603 |
#ifdef FLOAT128
|
604 |
|
605 |
/*----------------------------------------------------------------------------
|
606 |
| Software IEC/IEEE quadruple-precision conversion routines.
|
607 |
*----------------------------------------------------------------------------*/
|
608 |
int32 float128_to_int32( float128 STATUS_PARAM ); |
609 |
int32 float128_to_int32_round_to_zero( float128 STATUS_PARAM ); |
610 |
int64 float128_to_int64( float128 STATUS_PARAM ); |
611 |
int64 float128_to_int64_round_to_zero( float128 STATUS_PARAM ); |
612 |
float32 float128_to_float32( float128 STATUS_PARAM ); |
613 |
float64 float128_to_float64( float128 STATUS_PARAM ); |
614 |
#ifdef FLOATX80
|
615 |
floatx80 float128_to_floatx80( float128 STATUS_PARAM ); |
616 |
#endif
|
617 |
|
618 |
/*----------------------------------------------------------------------------
|
619 |
| Software IEC/IEEE quadruple-precision operations.
|
620 |
*----------------------------------------------------------------------------*/
|
621 |
float128 float128_round_to_int( float128 STATUS_PARAM ); |
622 |
float128 float128_add( float128, float128 STATUS_PARAM ); |
623 |
float128 float128_sub( float128, float128 STATUS_PARAM ); |
624 |
float128 float128_mul( float128, float128 STATUS_PARAM ); |
625 |
float128 float128_div( float128, float128 STATUS_PARAM ); |
626 |
float128 float128_rem( float128, float128 STATUS_PARAM ); |
627 |
float128 float128_sqrt( float128 STATUS_PARAM ); |
628 |
int float128_eq( float128, float128 STATUS_PARAM );
|
629 |
int float128_le( float128, float128 STATUS_PARAM );
|
630 |
int float128_lt( float128, float128 STATUS_PARAM );
|
631 |
int float128_eq_signaling( float128, float128 STATUS_PARAM );
|
632 |
int float128_le_quiet( float128, float128 STATUS_PARAM );
|
633 |
int float128_lt_quiet( float128, float128 STATUS_PARAM );
|
634 |
int float128_compare( float128, float128 STATUS_PARAM );
|
635 |
int float128_compare_quiet( float128, float128 STATUS_PARAM );
|
636 |
int float128_is_quiet_nan( float128 );
|
637 |
int float128_is_signaling_nan( float128 );
|
638 |
float128 float128_maybe_silence_nan( float128 ); |
639 |
float128 float128_scalbn( float128, int STATUS_PARAM );
|
640 |
|
641 |
INLINE float128 float128_abs(float128 a) |
642 |
{ |
643 |
a.high &= 0x7fffffffffffffffLL;
|
644 |
return a;
|
645 |
} |
646 |
|
647 |
INLINE float128 float128_chs(float128 a) |
648 |
{ |
649 |
a.high ^= 0x8000000000000000LL;
|
650 |
return a;
|
651 |
} |
652 |
|
653 |
INLINE int float128_is_infinity(float128 a)
|
654 |
{ |
655 |
return (a.high & 0x7fffffffffffffffLL) == 0x7fff000000000000LL && a.low == 0; |
656 |
} |
657 |
|
658 |
INLINE int float128_is_neg(float128 a)
|
659 |
{ |
660 |
return a.high >> 63; |
661 |
} |
662 |
|
663 |
INLINE int float128_is_zero(float128 a)
|
664 |
{ |
665 |
return (a.high & 0x7fffffffffffffffLL) == 0 && a.low == 0; |
666 |
} |
667 |
|
668 |
INLINE int float128_is_any_nan(float128 a)
|
669 |
{ |
670 |
return ((a.high >> 48) & 0x7fff) == 0x7fff && |
671 |
((a.low != 0) || ((a.high & 0xffffffffffffLL) != 0)); |
672 |
} |
673 |
|
674 |
/*----------------------------------------------------------------------------
|
675 |
| The pattern for a default generated quadruple-precision NaN. The `high' and
|
676 |
| `low' values hold the most- and least-significant bits, respectively.
|
677 |
*----------------------------------------------------------------------------*/
|
678 |
#if SNAN_BIT_IS_ONE
|
679 |
#define float128_default_nan_high LIT64( 0x7FFF7FFFFFFFFFFF ) |
680 |
#define float128_default_nan_low LIT64( 0xFFFFFFFFFFFFFFFF ) |
681 |
#else
|
682 |
#define float128_default_nan_high LIT64( 0xFFFF800000000000 ) |
683 |
#define float128_default_nan_low LIT64( 0x0000000000000000 ) |
684 |
#endif
|
685 |
|
686 |
#endif
|
687 |
|
688 |
#else /* CONFIG_SOFTFLOAT */ |
689 |
|
690 |
#include "softfloat-native.h" |
691 |
|
692 |
#endif /* !CONFIG_SOFTFLOAT */ |
693 |
|
694 |
#endif /* !SOFTFLOAT_H */ |