e6afc87f80
Add a new float_flag_output_denormal which is set when the result of a floating point operation would be denormal but is flushed to zero because we are in flush_to_zero mode. This is necessary because some architectures signal this condition as an underflow and others signal it as an inexact result. Signed-off-by: Peter Maydell <peter.maydell@linaro.org> Signed-off-by: Aurelien Jarno <aurelien@aurel32.net>
709 lines
26 KiB
C
709 lines
26 KiB
C
/*
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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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#define LIT64( a ) a##LL
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#define INLINE static inline
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#if defined(TARGET_MIPS) || defined(TARGET_SH4) || defined(TARGET_UNICORE32)
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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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#define make_floatx80(exp, mant) ((floatx80) { mant, exp })
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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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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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#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_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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#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_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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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;
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}
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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)
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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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#if defined(TARGET_SPARC)
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#define float32_default_nan make_float32(0x7FFFFFFF)
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#elif defined(TARGET_PPC) || defined(TARGET_ARM) || defined(TARGET_ALPHA)
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#define float32_default_nan make_float32(0x7FC00000)
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#elif SNAN_BIT_IS_ONE
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#define float32_default_nan make_float32(0x7FBFFFFF)
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#else
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#define float32_default_nan make_float32(0xFFC00000)
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#endif
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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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int16 float64_to_int16_round_to_zero( float64 STATUS_PARAM );
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unsigned int 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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#ifdef FLOATX80
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floatx80 float64_to_floatx80( float64 STATUS_PARAM );
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#endif
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#ifdef FLOAT128
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float128 float64_to_float128( float64 STATUS_PARAM );
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#endif
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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 );
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float64 float64_add( float64, float64 STATUS_PARAM );
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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 );
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float64 float64_sqrt( float64 STATUS_PARAM );
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float64 float64_log2( float64 STATUS_PARAM );
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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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int float64_le_quiet( float64, float64 STATUS_PARAM );
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int float64_lt_quiet( float64, float64 STATUS_PARAM );
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int float64_unordered_quiet( float64, float64 STATUS_PARAM );
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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);
|
|
float64 float64_max(float64, float64 STATUS_PARAM);
|
|
int float64_is_quiet_nan( float64 a );
|
|
int float64_is_signaling_nan( float64 );
|
|
float64 float64_maybe_silence_nan( float64 );
|
|
float64 float64_scalbn( float64, int STATUS_PARAM );
|
|
|
|
INLINE float64 float64_abs(float64 a)
|
|
{
|
|
/* Note that abs does *not* handle NaN specially, nor does
|
|
* it flush denormal inputs to zero.
|
|
*/
|
|
return make_float64(float64_val(a) & 0x7fffffffffffffffLL);
|
|
}
|
|
|
|
INLINE float64 float64_chs(float64 a)
|
|
{
|
|
/* Note that chs does *not* handle NaN specially, nor does
|
|
* it flush denormal inputs to zero.
|
|
*/
|
|
return make_float64(float64_val(a) ^ 0x8000000000000000LL);
|
|
}
|
|
|
|
INLINE int float64_is_infinity(float64 a)
|
|
{
|
|
return (float64_val(a) & 0x7fffffffffffffffLL ) == 0x7ff0000000000000LL;
|
|
}
|
|
|
|
INLINE int float64_is_neg(float64 a)
|
|
{
|
|
return float64_val(a) >> 63;
|
|
}
|
|
|
|
INLINE int float64_is_zero(float64 a)
|
|
{
|
|
return (float64_val(a) & 0x7fffffffffffffffLL) == 0;
|
|
}
|
|
|
|
INLINE int float64_is_any_nan(float64 a)
|
|
{
|
|
return ((float64_val(a) & ~(1ULL << 63)) > 0x7ff0000000000000ULL);
|
|
}
|
|
|
|
INLINE float64 float64_set_sign(float64 a, int sign)
|
|
{
|
|
return make_float64((float64_val(a) & 0x7fffffffffffffffULL)
|
|
| ((int64_t)sign << 63));
|
|
}
|
|
|
|
#define float64_zero make_float64(0)
|
|
#define float64_one make_float64(0x3ff0000000000000LL)
|
|
#define float64_ln2 make_float64(0x3fe62e42fefa39efLL)
|
|
#define float64_pi make_float64(0x400921fb54442d18LL)
|
|
#define float64_half make_float64(0x3fe0000000000000LL)
|
|
#define float64_infinity make_float64(0x7ff0000000000000LL)
|
|
|
|
/*----------------------------------------------------------------------------
|
|
| The pattern for a default generated double-precision NaN.
|
|
*----------------------------------------------------------------------------*/
|
|
#if defined(TARGET_SPARC)
|
|
#define float64_default_nan make_float64(LIT64( 0x7FFFFFFFFFFFFFFF ))
|
|
#elif defined(TARGET_PPC) || defined(TARGET_ARM) || defined(TARGET_ALPHA)
|
|
#define float64_default_nan make_float64(LIT64( 0x7FF8000000000000 ))
|
|
#elif SNAN_BIT_IS_ONE
|
|
#define float64_default_nan make_float64(LIT64( 0x7FF7FFFFFFFFFFFF ))
|
|
#else
|
|
#define float64_default_nan make_float64(LIT64( 0xFFF8000000000000 ))
|
|
#endif
|
|
|
|
#ifdef FLOATX80
|
|
|
|
/*----------------------------------------------------------------------------
|
|
| Software IEC/IEEE extended double-precision conversion routines.
|
|
*----------------------------------------------------------------------------*/
|
|
int32 floatx80_to_int32( floatx80 STATUS_PARAM );
|
|
int32 floatx80_to_int32_round_to_zero( floatx80 STATUS_PARAM );
|
|
int64 floatx80_to_int64( floatx80 STATUS_PARAM );
|
|
int64 floatx80_to_int64_round_to_zero( floatx80 STATUS_PARAM );
|
|
float32 floatx80_to_float32( floatx80 STATUS_PARAM );
|
|
float64 floatx80_to_float64( floatx80 STATUS_PARAM );
|
|
#ifdef FLOAT128
|
|
float128 floatx80_to_float128( floatx80 STATUS_PARAM );
|
|
#endif
|
|
|
|
/*----------------------------------------------------------------------------
|
|
| Software IEC/IEEE extended double-precision operations.
|
|
*----------------------------------------------------------------------------*/
|
|
floatx80 floatx80_round_to_int( floatx80 STATUS_PARAM );
|
|
floatx80 floatx80_add( floatx80, floatx80 STATUS_PARAM );
|
|
floatx80 floatx80_sub( floatx80, floatx80 STATUS_PARAM );
|
|
floatx80 floatx80_mul( floatx80, floatx80 STATUS_PARAM );
|
|
floatx80 floatx80_div( floatx80, floatx80 STATUS_PARAM );
|
|
floatx80 floatx80_rem( floatx80, floatx80 STATUS_PARAM );
|
|
floatx80 floatx80_sqrt( floatx80 STATUS_PARAM );
|
|
int floatx80_eq( floatx80, floatx80 STATUS_PARAM );
|
|
int floatx80_le( floatx80, floatx80 STATUS_PARAM );
|
|
int floatx80_lt( floatx80, floatx80 STATUS_PARAM );
|
|
int floatx80_unordered( floatx80, floatx80 STATUS_PARAM );
|
|
int floatx80_eq_quiet( floatx80, floatx80 STATUS_PARAM );
|
|
int floatx80_le_quiet( floatx80, floatx80 STATUS_PARAM );
|
|
int floatx80_lt_quiet( floatx80, floatx80 STATUS_PARAM );
|
|
int floatx80_unordered_quiet( floatx80, floatx80 STATUS_PARAM );
|
|
int floatx80_compare( floatx80, floatx80 STATUS_PARAM );
|
|
int floatx80_compare_quiet( floatx80, floatx80 STATUS_PARAM );
|
|
int floatx80_is_quiet_nan( floatx80 );
|
|
int floatx80_is_signaling_nan( floatx80 );
|
|
floatx80 floatx80_maybe_silence_nan( floatx80 );
|
|
floatx80 floatx80_scalbn( floatx80, int STATUS_PARAM );
|
|
|
|
INLINE floatx80 floatx80_abs(floatx80 a)
|
|
{
|
|
a.high &= 0x7fff;
|
|
return a;
|
|
}
|
|
|
|
INLINE floatx80 floatx80_chs(floatx80 a)
|
|
{
|
|
a.high ^= 0x8000;
|
|
return a;
|
|
}
|
|
|
|
INLINE int floatx80_is_infinity(floatx80 a)
|
|
{
|
|
return (a.high & 0x7fff) == 0x7fff && a.low == 0x8000000000000000LL;
|
|
}
|
|
|
|
INLINE int floatx80_is_neg(floatx80 a)
|
|
{
|
|
return a.high >> 15;
|
|
}
|
|
|
|
INLINE int floatx80_is_zero(floatx80 a)
|
|
{
|
|
return (a.high & 0x7fff) == 0 && a.low == 0;
|
|
}
|
|
|
|
INLINE int floatx80_is_any_nan(floatx80 a)
|
|
{
|
|
return ((a.high & 0x7fff) == 0x7fff) && (a.low<<1);
|
|
}
|
|
|
|
#define floatx80_zero make_floatx80(0x0000, 0x0000000000000000LL)
|
|
#define floatx80_one make_floatx80(0x3fff, 0x8000000000000000LL)
|
|
#define floatx80_ln2 make_floatx80(0x3ffe, 0xb17217f7d1cf79acLL)
|
|
#define floatx80_pi make_floatx80(0x4000, 0xc90fdaa22168c235LL)
|
|
#define floatx80_half make_floatx80(0x3ffe, 0x8000000000000000LL)
|
|
#define floatx80_infinity make_floatx80(0x7fff, 0x8000000000000000LL)
|
|
|
|
/*----------------------------------------------------------------------------
|
|
| The pattern for a default generated extended double-precision NaN. The
|
|
| `high' and `low' values hold the most- and least-significant bits,
|
|
| respectively.
|
|
*----------------------------------------------------------------------------*/
|
|
#if SNAN_BIT_IS_ONE
|
|
#define floatx80_default_nan_high 0x7FFF
|
|
#define floatx80_default_nan_low LIT64( 0xBFFFFFFFFFFFFFFF )
|
|
#else
|
|
#define floatx80_default_nan_high 0xFFFF
|
|
#define floatx80_default_nan_low LIT64( 0xC000000000000000 )
|
|
#endif
|
|
|
|
#endif
|
|
|
|
#ifdef FLOAT128
|
|
|
|
/*----------------------------------------------------------------------------
|
|
| Software IEC/IEEE quadruple-precision conversion routines.
|
|
*----------------------------------------------------------------------------*/
|
|
int32 float128_to_int32( float128 STATUS_PARAM );
|
|
int32 float128_to_int32_round_to_zero( float128 STATUS_PARAM );
|
|
int64 float128_to_int64( float128 STATUS_PARAM );
|
|
int64 float128_to_int64_round_to_zero( float128 STATUS_PARAM );
|
|
float32 float128_to_float32( float128 STATUS_PARAM );
|
|
float64 float128_to_float64( float128 STATUS_PARAM );
|
|
#ifdef FLOATX80
|
|
floatx80 float128_to_floatx80( float128 STATUS_PARAM );
|
|
#endif
|
|
|
|
/*----------------------------------------------------------------------------
|
|
| Software IEC/IEEE quadruple-precision operations.
|
|
*----------------------------------------------------------------------------*/
|
|
float128 float128_round_to_int( float128 STATUS_PARAM );
|
|
float128 float128_add( float128, float128 STATUS_PARAM );
|
|
float128 float128_sub( float128, float128 STATUS_PARAM );
|
|
float128 float128_mul( float128, float128 STATUS_PARAM );
|
|
float128 float128_div( float128, float128 STATUS_PARAM );
|
|
float128 float128_rem( float128, float128 STATUS_PARAM );
|
|
float128 float128_sqrt( float128 STATUS_PARAM );
|
|
int float128_eq( float128, float128 STATUS_PARAM );
|
|
int float128_le( float128, float128 STATUS_PARAM );
|
|
int float128_lt( float128, float128 STATUS_PARAM );
|
|
int float128_unordered( float128, float128 STATUS_PARAM );
|
|
int float128_eq_quiet( float128, float128 STATUS_PARAM );
|
|
int float128_le_quiet( float128, float128 STATUS_PARAM );
|
|
int float128_lt_quiet( float128, float128 STATUS_PARAM );
|
|
int float128_unordered_quiet( float128, float128 STATUS_PARAM );
|
|
int float128_compare( float128, float128 STATUS_PARAM );
|
|
int float128_compare_quiet( float128, float128 STATUS_PARAM );
|
|
int float128_is_quiet_nan( float128 );
|
|
int float128_is_signaling_nan( float128 );
|
|
float128 float128_maybe_silence_nan( float128 );
|
|
float128 float128_scalbn( float128, int STATUS_PARAM );
|
|
|
|
INLINE float128 float128_abs(float128 a)
|
|
{
|
|
a.high &= 0x7fffffffffffffffLL;
|
|
return a;
|
|
}
|
|
|
|
INLINE float128 float128_chs(float128 a)
|
|
{
|
|
a.high ^= 0x8000000000000000LL;
|
|
return a;
|
|
}
|
|
|
|
INLINE int float128_is_infinity(float128 a)
|
|
{
|
|
return (a.high & 0x7fffffffffffffffLL) == 0x7fff000000000000LL && a.low == 0;
|
|
}
|
|
|
|
INLINE int float128_is_neg(float128 a)
|
|
{
|
|
return a.high >> 63;
|
|
}
|
|
|
|
INLINE int float128_is_zero(float128 a)
|
|
{
|
|
return (a.high & 0x7fffffffffffffffLL) == 0 && a.low == 0;
|
|
}
|
|
|
|
INLINE int float128_is_any_nan(float128 a)
|
|
{
|
|
return ((a.high >> 48) & 0x7fff) == 0x7fff &&
|
|
((a.low != 0) || ((a.high & 0xffffffffffffLL) != 0));
|
|
}
|
|
|
|
/*----------------------------------------------------------------------------
|
|
| The pattern for a default generated quadruple-precision NaN. The `high' and
|
|
| `low' values hold the most- and least-significant bits, respectively.
|
|
*----------------------------------------------------------------------------*/
|
|
#if SNAN_BIT_IS_ONE
|
|
#define float128_default_nan_high LIT64( 0x7FFF7FFFFFFFFFFF )
|
|
#define float128_default_nan_low LIT64( 0xFFFFFFFFFFFFFFFF )
|
|
#else
|
|
#define float128_default_nan_high LIT64( 0xFFFF800000000000 )
|
|
#define float128_default_nan_low LIT64( 0x0000000000000000 )
|
|
#endif
|
|
|
|
#endif
|
|
|
|
#else /* CONFIG_SOFTFLOAT */
|
|
|
|
#include "softfloat-native.h"
|
|
|
|
#endif /* !CONFIG_SOFTFLOAT */
|
|
|
|
#endif /* !SOFTFLOAT_H */
|