root / include / fpu / softfloat.h @ 47a34e00
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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-host.h" |
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#include "qemu/osdep.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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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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#define LIT64( a ) a##LL |
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#define INLINE static inline |
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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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/*----------------------------------------------------------------------------
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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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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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#define make_floatx80(exp, mant) ((floatx80) { mant, exp })
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#define make_floatx80_init(exp, mant) { .low = mant, .high = exp }
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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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#define make_float128(high_, low_) ((float128) { .high = high_, .low = low_ })
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#define make_float128_init(high_, low_) { .high = high_, .low = low_ }
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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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float_flag_output_denormal = 128
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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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signed char floatx80_rounding_precision; |
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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_float_detect_tininess(int val STATUS_PARAM) |
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{ |
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STATUS(float_detect_tininess) = val; |
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} |
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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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void set_floatx80_rounding_precision(int val STATUS_PARAM); |
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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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| Options to indicate which negations to perform in float*_muladd()
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| Using these differs from negating an input or output before calling
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| the muladd function in that this means that a NaN doesn't have its
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| sign bit inverted before it is propagated.
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*----------------------------------------------------------------------------*/
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enum {
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float_muladd_negate_c = 1,
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float_muladd_negate_product = 2,
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float_muladd_negate_result = 4,
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}; |
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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_t STATUS_PARAM); |
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float64 int32_to_float64(int32_t STATUS_PARAM); |
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float32 uint32_to_float32(uint32_t STATUS_PARAM); |
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float64 uint32_to_float64(uint32_t STATUS_PARAM); |
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floatx80 int32_to_floatx80(int32_t STATUS_PARAM); |
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float128 int32_to_float128(int32_t STATUS_PARAM); |
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float32 int64_to_float32(int64_t STATUS_PARAM); |
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float32 uint64_to_float32(uint64_t STATUS_PARAM); |
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float64 int64_to_float64(int64_t STATUS_PARAM); |
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float64 uint64_to_float64(uint64_t STATUS_PARAM); |
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floatx80 int64_to_floatx80(int64_t STATUS_PARAM); |
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float128 int64_to_float128(int64_t STATUS_PARAM); |
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float128 uint64_to_float128(uint64_t STATUS_PARAM); |
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/* We provide the int16 versions for symmetry of API with float-to-int */
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INLINE float32 int16_to_float32(int16_t v STATUS_PARAM) |
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{ |
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return int32_to_float32(v STATUS_VAR);
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} |
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INLINE float32 uint16_to_float32(uint16_t v STATUS_PARAM) |
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{ |
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return uint32_to_float32(v STATUS_VAR);
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} |
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INLINE float64 int16_to_float64(int16_t v STATUS_PARAM) |
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{ |
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return int32_to_float64(v STATUS_VAR);
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} |
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INLINE float64 uint16_to_float64(uint16_t v STATUS_PARAM) |
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{ |
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return uint32_to_float64(v STATUS_VAR);
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} |
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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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INLINE int float16_is_any_nan(float16 a)
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{ |
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return ((float16_val(a) & ~0x8000) > 0x7c00); |
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} |
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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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extern const float16 float16_default_nan; |
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/*----------------------------------------------------------------------------
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| Software IEC/IEEE single-precision conversion routines.
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*----------------------------------------------------------------------------*/
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int_fast16_t float32_to_int16(float32 STATUS_PARAM); |
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uint_fast16_t float32_to_uint16(float32 STATUS_PARAM); |
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int_fast16_t float32_to_int16_round_to_zero(float32 STATUS_PARAM); |
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uint_fast16_t 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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uint64 float32_to_uint64(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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floatx80 float32_to_floatx80( float32 STATUS_PARAM ); |
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float128 float32_to_float128( float32 STATUS_PARAM ); |
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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_muladd(float32, float32, float32, int 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_unordered( float32, float32 STATUS_PARAM );
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int float32_eq_quiet( 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_unordered_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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float32 float32_min(float32, float32 STATUS_PARAM); |
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float32 float32_max(float32, float32 STATUS_PARAM); |
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float32 float32_minnum(float32, float32 STATUS_PARAM); |
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float32 float32_maxnum(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; |
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} |
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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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} |
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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; |
365 |
} |
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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); |
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} |
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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; |
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} |
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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)); |
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} |
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#define float32_zero make_float32(0) |
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#define float32_one make_float32(0x3f800000) |
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#define float32_ln2 make_float32(0x3f317218) |
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#define float32_pi make_float32(0x40490fdb) |
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#define float32_half make_float32(0x3f000000) |
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#define float32_infinity make_float32(0x7f800000) |
388 |
|
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|
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/*----------------------------------------------------------------------------
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| The pattern for a default generated single-precision NaN.
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*----------------------------------------------------------------------------*/
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extern const float32 float32_default_nan; |
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|
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/*----------------------------------------------------------------------------
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| Software IEC/IEEE double-precision conversion routines.
|
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*----------------------------------------------------------------------------*/
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int_fast16_t float64_to_int16(float64 STATUS_PARAM); |
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uint_fast16_t float64_to_uint16(float64 STATUS_PARAM); |
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int_fast16_t float64_to_int16_round_to_zero(float64 STATUS_PARAM); |
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uint_fast16_t float64_to_uint16_round_to_zero(float64 STATUS_PARAM); |
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int32 float64_to_int32( float64 STATUS_PARAM ); |
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int32 float64_to_int32_round_to_zero( float64 STATUS_PARAM ); |
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uint32 float64_to_uint32( float64 STATUS_PARAM ); |
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uint32 float64_to_uint32_round_to_zero( float64 STATUS_PARAM ); |
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int64 float64_to_int64( float64 STATUS_PARAM ); |
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int64 float64_to_int64_round_to_zero( float64 STATUS_PARAM ); |
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uint64 float64_to_uint64 (float64 a STATUS_PARAM); |
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uint64 float64_to_uint64_round_to_zero (float64 a STATUS_PARAM); |
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float32 float64_to_float32( float64 STATUS_PARAM ); |
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floatx80 float64_to_floatx80( float64 STATUS_PARAM ); |
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float128 float64_to_float128( float64 STATUS_PARAM ); |
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|
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/*----------------------------------------------------------------------------
|
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| Software IEC/IEEE double-precision operations.
|
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*----------------------------------------------------------------------------*/
|
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float64 float64_round_to_int( float64 STATUS_PARAM ); |
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float64 float64_trunc_to_int( float64 STATUS_PARAM ); |
419 |
float64 float64_add( float64, float64 STATUS_PARAM ); |
420 |
float64 float64_sub( float64, float64 STATUS_PARAM ); |
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float64 float64_mul( float64, float64 STATUS_PARAM ); |
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float64 float64_div( float64, float64 STATUS_PARAM ); |
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float64 float64_rem( float64, float64 STATUS_PARAM ); |
424 |
float64 float64_muladd(float64, float64, float64, int STATUS_PARAM);
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float64 float64_sqrt( float64 STATUS_PARAM ); |
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float64 float64_log2( float64 STATUS_PARAM ); |
427 |
int float64_eq( float64, float64 STATUS_PARAM );
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int float64_le( float64, float64 STATUS_PARAM );
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int float64_lt( float64, float64 STATUS_PARAM );
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int float64_unordered( float64, float64 STATUS_PARAM );
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int float64_eq_quiet( float64, float64 STATUS_PARAM );
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432 |
int float64_le_quiet( float64, float64 STATUS_PARAM );
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int float64_lt_quiet( float64, float64 STATUS_PARAM );
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434 |
int float64_unordered_quiet( float64, float64 STATUS_PARAM );
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435 |
int float64_compare( float64, float64 STATUS_PARAM );
|
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int float64_compare_quiet( float64, float64 STATUS_PARAM );
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float64 float64_min(float64, float64 STATUS_PARAM); |
438 |
float64 float64_max(float64, float64 STATUS_PARAM); |
439 |
float64 float64_minnum(float64, float64 STATUS_PARAM); |
440 |
float64 float64_maxnum(float64, float64 STATUS_PARAM); |
441 |
int float64_is_quiet_nan( float64 a );
|
442 |
int float64_is_signaling_nan( float64 );
|
443 |
float64 float64_maybe_silence_nan( float64 ); |
444 |
float64 float64_scalbn( float64, int STATUS_PARAM );
|
445 |
|
446 |
INLINE float64 float64_abs(float64 a) |
447 |
{ |
448 |
/* Note that abs does *not* handle NaN specially, nor does
|
449 |
* it flush denormal inputs to zero.
|
450 |
*/
|
451 |
return make_float64(float64_val(a) & 0x7fffffffffffffffLL); |
452 |
} |
453 |
|
454 |
INLINE float64 float64_chs(float64 a) |
455 |
{ |
456 |
/* Note that chs does *not* handle NaN specially, nor does
|
457 |
* it flush denormal inputs to zero.
|
458 |
*/
|
459 |
return make_float64(float64_val(a) ^ 0x8000000000000000LL); |
460 |
} |
461 |
|
462 |
INLINE int float64_is_infinity(float64 a)
|
463 |
{ |
464 |
return (float64_val(a) & 0x7fffffffffffffffLL ) == 0x7ff0000000000000LL; |
465 |
} |
466 |
|
467 |
INLINE int float64_is_neg(float64 a)
|
468 |
{ |
469 |
return float64_val(a) >> 63; |
470 |
} |
471 |
|
472 |
INLINE int float64_is_zero(float64 a)
|
473 |
{ |
474 |
return (float64_val(a) & 0x7fffffffffffffffLL) == 0; |
475 |
} |
476 |
|
477 |
INLINE int float64_is_any_nan(float64 a)
|
478 |
{ |
479 |
return ((float64_val(a) & ~(1ULL << 63)) > 0x7ff0000000000000ULL); |
480 |
} |
481 |
|
482 |
INLINE int float64_is_zero_or_denormal(float64 a)
|
483 |
{ |
484 |
return (float64_val(a) & 0x7ff0000000000000LL) == 0; |
485 |
} |
486 |
|
487 |
INLINE float64 float64_set_sign(float64 a, int sign)
|
488 |
{ |
489 |
return make_float64((float64_val(a) & 0x7fffffffffffffffULL) |
490 |
| ((int64_t)sign << 63));
|
491 |
} |
492 |
|
493 |
#define float64_zero make_float64(0) |
494 |
#define float64_one make_float64(0x3ff0000000000000LL) |
495 |
#define float64_ln2 make_float64(0x3fe62e42fefa39efLL) |
496 |
#define float64_pi make_float64(0x400921fb54442d18LL) |
497 |
#define float64_half make_float64(0x3fe0000000000000LL) |
498 |
#define float64_infinity make_float64(0x7ff0000000000000LL) |
499 |
|
500 |
/*----------------------------------------------------------------------------
|
501 |
| The pattern for a default generated double-precision NaN.
|
502 |
*----------------------------------------------------------------------------*/
|
503 |
extern const float64 float64_default_nan; |
504 |
|
505 |
/*----------------------------------------------------------------------------
|
506 |
| Software IEC/IEEE extended double-precision conversion routines.
|
507 |
*----------------------------------------------------------------------------*/
|
508 |
int32 floatx80_to_int32( floatx80 STATUS_PARAM ); |
509 |
int32 floatx80_to_int32_round_to_zero( floatx80 STATUS_PARAM ); |
510 |
int64 floatx80_to_int64( floatx80 STATUS_PARAM ); |
511 |
int64 floatx80_to_int64_round_to_zero( floatx80 STATUS_PARAM ); |
512 |
float32 floatx80_to_float32( floatx80 STATUS_PARAM ); |
513 |
float64 floatx80_to_float64( floatx80 STATUS_PARAM ); |
514 |
float128 floatx80_to_float128( floatx80 STATUS_PARAM ); |
515 |
|
516 |
/*----------------------------------------------------------------------------
|
517 |
| Software IEC/IEEE extended double-precision operations.
|
518 |
*----------------------------------------------------------------------------*/
|
519 |
floatx80 floatx80_round_to_int( floatx80 STATUS_PARAM ); |
520 |
floatx80 floatx80_add( floatx80, floatx80 STATUS_PARAM ); |
521 |
floatx80 floatx80_sub( floatx80, floatx80 STATUS_PARAM ); |
522 |
floatx80 floatx80_mul( floatx80, floatx80 STATUS_PARAM ); |
523 |
floatx80 floatx80_div( floatx80, floatx80 STATUS_PARAM ); |
524 |
floatx80 floatx80_rem( floatx80, floatx80 STATUS_PARAM ); |
525 |
floatx80 floatx80_sqrt( floatx80 STATUS_PARAM ); |
526 |
int floatx80_eq( floatx80, floatx80 STATUS_PARAM );
|
527 |
int floatx80_le( floatx80, floatx80 STATUS_PARAM );
|
528 |
int floatx80_lt( floatx80, floatx80 STATUS_PARAM );
|
529 |
int floatx80_unordered( floatx80, floatx80 STATUS_PARAM );
|
530 |
int floatx80_eq_quiet( floatx80, floatx80 STATUS_PARAM );
|
531 |
int floatx80_le_quiet( floatx80, floatx80 STATUS_PARAM );
|
532 |
int floatx80_lt_quiet( floatx80, floatx80 STATUS_PARAM );
|
533 |
int floatx80_unordered_quiet( floatx80, floatx80 STATUS_PARAM );
|
534 |
int floatx80_compare( floatx80, floatx80 STATUS_PARAM );
|
535 |
int floatx80_compare_quiet( floatx80, floatx80 STATUS_PARAM );
|
536 |
int floatx80_is_quiet_nan( floatx80 );
|
537 |
int floatx80_is_signaling_nan( floatx80 );
|
538 |
floatx80 floatx80_maybe_silence_nan( floatx80 ); |
539 |
floatx80 floatx80_scalbn( floatx80, int STATUS_PARAM );
|
540 |
|
541 |
INLINE floatx80 floatx80_abs(floatx80 a) |
542 |
{ |
543 |
a.high &= 0x7fff;
|
544 |
return a;
|
545 |
} |
546 |
|
547 |
INLINE floatx80 floatx80_chs(floatx80 a) |
548 |
{ |
549 |
a.high ^= 0x8000;
|
550 |
return a;
|
551 |
} |
552 |
|
553 |
INLINE int floatx80_is_infinity(floatx80 a)
|
554 |
{ |
555 |
return (a.high & 0x7fff) == 0x7fff && a.low == 0x8000000000000000LL; |
556 |
} |
557 |
|
558 |
INLINE int floatx80_is_neg(floatx80 a)
|
559 |
{ |
560 |
return a.high >> 15; |
561 |
} |
562 |
|
563 |
INLINE int floatx80_is_zero(floatx80 a)
|
564 |
{ |
565 |
return (a.high & 0x7fff) == 0 && a.low == 0; |
566 |
} |
567 |
|
568 |
INLINE int floatx80_is_zero_or_denormal(floatx80 a)
|
569 |
{ |
570 |
return (a.high & 0x7fff) == 0; |
571 |
} |
572 |
|
573 |
INLINE int floatx80_is_any_nan(floatx80 a)
|
574 |
{ |
575 |
return ((a.high & 0x7fff) == 0x7fff) && (a.low<<1); |
576 |
} |
577 |
|
578 |
#define floatx80_zero make_floatx80(0x0000, 0x0000000000000000LL) |
579 |
#define floatx80_one make_floatx80(0x3fff, 0x8000000000000000LL) |
580 |
#define floatx80_ln2 make_floatx80(0x3ffe, 0xb17217f7d1cf79acLL) |
581 |
#define floatx80_pi make_floatx80(0x4000, 0xc90fdaa22168c235LL) |
582 |
#define floatx80_half make_floatx80(0x3ffe, 0x8000000000000000LL) |
583 |
#define floatx80_infinity make_floatx80(0x7fff, 0x8000000000000000LL) |
584 |
|
585 |
/*----------------------------------------------------------------------------
|
586 |
| The pattern for a default generated extended double-precision NaN.
|
587 |
*----------------------------------------------------------------------------*/
|
588 |
extern const floatx80 floatx80_default_nan; |
589 |
|
590 |
/*----------------------------------------------------------------------------
|
591 |
| Software IEC/IEEE quadruple-precision conversion routines.
|
592 |
*----------------------------------------------------------------------------*/
|
593 |
int32 float128_to_int32( float128 STATUS_PARAM ); |
594 |
int32 float128_to_int32_round_to_zero( float128 STATUS_PARAM ); |
595 |
int64 float128_to_int64( float128 STATUS_PARAM ); |
596 |
int64 float128_to_int64_round_to_zero( float128 STATUS_PARAM ); |
597 |
float32 float128_to_float32( float128 STATUS_PARAM ); |
598 |
float64 float128_to_float64( float128 STATUS_PARAM ); |
599 |
floatx80 float128_to_floatx80( float128 STATUS_PARAM ); |
600 |
|
601 |
/*----------------------------------------------------------------------------
|
602 |
| Software IEC/IEEE quadruple-precision operations.
|
603 |
*----------------------------------------------------------------------------*/
|
604 |
float128 float128_round_to_int( float128 STATUS_PARAM ); |
605 |
float128 float128_add( float128, float128 STATUS_PARAM ); |
606 |
float128 float128_sub( float128, float128 STATUS_PARAM ); |
607 |
float128 float128_mul( float128, float128 STATUS_PARAM ); |
608 |
float128 float128_div( float128, float128 STATUS_PARAM ); |
609 |
float128 float128_rem( float128, float128 STATUS_PARAM ); |
610 |
float128 float128_sqrt( float128 STATUS_PARAM ); |
611 |
int float128_eq( float128, float128 STATUS_PARAM );
|
612 |
int float128_le( float128, float128 STATUS_PARAM );
|
613 |
int float128_lt( float128, float128 STATUS_PARAM );
|
614 |
int float128_unordered( float128, float128 STATUS_PARAM );
|
615 |
int float128_eq_quiet( float128, float128 STATUS_PARAM );
|
616 |
int float128_le_quiet( float128, float128 STATUS_PARAM );
|
617 |
int float128_lt_quiet( float128, float128 STATUS_PARAM );
|
618 |
int float128_unordered_quiet( float128, float128 STATUS_PARAM );
|
619 |
int float128_compare( float128, float128 STATUS_PARAM );
|
620 |
int float128_compare_quiet( float128, float128 STATUS_PARAM );
|
621 |
int float128_is_quiet_nan( float128 );
|
622 |
int float128_is_signaling_nan( float128 );
|
623 |
float128 float128_maybe_silence_nan( float128 ); |
624 |
float128 float128_scalbn( float128, int STATUS_PARAM );
|
625 |
|
626 |
INLINE float128 float128_abs(float128 a) |
627 |
{ |
628 |
a.high &= 0x7fffffffffffffffLL;
|
629 |
return a;
|
630 |
} |
631 |
|
632 |
INLINE float128 float128_chs(float128 a) |
633 |
{ |
634 |
a.high ^= 0x8000000000000000LL;
|
635 |
return a;
|
636 |
} |
637 |
|
638 |
INLINE int float128_is_infinity(float128 a)
|
639 |
{ |
640 |
return (a.high & 0x7fffffffffffffffLL) == 0x7fff000000000000LL && a.low == 0; |
641 |
} |
642 |
|
643 |
INLINE int float128_is_neg(float128 a)
|
644 |
{ |
645 |
return a.high >> 63; |
646 |
} |
647 |
|
648 |
INLINE int float128_is_zero(float128 a)
|
649 |
{ |
650 |
return (a.high & 0x7fffffffffffffffLL) == 0 && a.low == 0; |
651 |
} |
652 |
|
653 |
INLINE int float128_is_zero_or_denormal(float128 a)
|
654 |
{ |
655 |
return (a.high & 0x7fff000000000000LL) == 0; |
656 |
} |
657 |
|
658 |
INLINE int float128_is_any_nan(float128 a)
|
659 |
{ |
660 |
return ((a.high >> 48) & 0x7fff) == 0x7fff && |
661 |
((a.low != 0) || ((a.high & 0xffffffffffffLL) != 0)); |
662 |
} |
663 |
|
664 |
#define float128_zero make_float128(0, 0) |
665 |
|
666 |
/*----------------------------------------------------------------------------
|
667 |
| The pattern for a default generated quadruple-precision NaN.
|
668 |
*----------------------------------------------------------------------------*/
|
669 |
extern const float128 float128_default_nan; |
670 |
|
671 |
#endif /* !SOFTFLOAT_H */ |