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softfloat-helpers.h (4575B)

      1 /*
      2  * QEMU float support - standalone helpers
      3  *
      4  * This is provided for files that don't need the access to the full
      5  * set of softfloat functions. Typically this is cpu initialisation
      6  * code which wants to set default rounding and exceptions modes.
      7  *
      8  * The code in this source file is derived from release 2a of the SoftFloat
      9  * IEC/IEEE Floating-point Arithmetic Package. Those parts of the code (and
     10  * some later contributions) are provided under that license, as detailed below.
     11  * It has subsequently been modified by contributors to the QEMU Project,
     12  * so some portions are provided under:
     13  *  the SoftFloat-2a license
     14  *  the BSD license
     15  *  GPL-v2-or-later
     16  *
     17  * Any future contributions to this file after December 1st 2014 will be
     18  * taken to be licensed under the Softfloat-2a license unless specifically
     19  * indicated otherwise.
     20  */
     21 
     22 /*
     23 ===============================================================================
     24 This C header file is part of the SoftFloat IEC/IEEE Floating-point
     25 Arithmetic Package, Release 2a.
     26 
     27 Written by John R. Hauser.  This work was made possible in part by the
     28 International Computer Science Institute, located at Suite 600, 1947 Center
     29 Street, Berkeley, California 94704.  Funding was partially provided by the
     30 National Science Foundation under grant MIP-9311980.  The original version
     31 of this code was written as part of a project to build a fixed-point vector
     32 processor in collaboration with the University of California at Berkeley,
     33 overseen by Profs. Nelson Morgan and John Wawrzynek.  More information
     34 is available through the Web page `http://HTTP.CS.Berkeley.EDU/~jhauser/
     35 arithmetic/SoftFloat.html'.
     36 
     37 THIS SOFTWARE IS DISTRIBUTED AS IS, FOR FREE.  Although reasonable effort
     38 has been made to avoid it, THIS SOFTWARE MAY CONTAIN FAULTS THAT WILL AT
     39 TIMES RESULT IN INCORRECT BEHAVIOR.  USE OF THIS SOFTWARE IS RESTRICTED TO
     40 PERSONS AND ORGANIZATIONS WHO CAN AND WILL TAKE FULL RESPONSIBILITY FOR ANY
     41 AND ALL LOSSES, COSTS, OR OTHER PROBLEMS ARISING FROM ITS USE.
     42 
     43 Derivative works are acceptable, even for commercial purposes, so long as
     44 (1) they include prominent notice that the work is derivative, and (2) they
     45 include prominent notice akin to these four paragraphs for those parts of
     46 this code that are retained.
     47 
     48 ===============================================================================
     49 */
     50 
     51 #ifndef SOFTFLOAT_HELPERS_H
     52 #define SOFTFLOAT_HELPERS_H
     53 
     54 #include "fpu/softfloat-types.h"
     55 
     56 static inline void set_float_detect_tininess(bool val, float_status *status)
     57 {
     58     status->tininess_before_rounding = val;
     59 }
     60 
     61 static inline void set_float_rounding_mode(FloatRoundMode val,
     62                                            float_status *status)
     63 {
     64     status->float_rounding_mode = val;
     65 }
     66 
     67 static inline void set_float_exception_flags(int val, float_status *status)
     68 {
     69     status->float_exception_flags = val;
     70 }
     71 
     72 static inline void set_floatx80_rounding_precision(FloatX80RoundPrec val,
     73                                                    float_status *status)
     74 {
     75     status->floatx80_rounding_precision = val;
     76 }
     77 
     78 static inline void set_flush_to_zero(bool val, float_status *status)
     79 {
     80     status->flush_to_zero = val;
     81 }
     82 
     83 static inline void set_flush_inputs_to_zero(bool val, float_status *status)
     84 {
     85     status->flush_inputs_to_zero = val;
     86 }
     87 
     88 static inline void set_default_nan_mode(bool val, float_status *status)
     89 {
     90     status->default_nan_mode = val;
     91 }
     92 
     93 static inline void set_snan_bit_is_one(bool val, float_status *status)
     94 {
     95     status->snan_bit_is_one = val;
     96 }
     97 
     98 static inline void set_use_first_nan(bool val, float_status *status)
     99 {
    100     status->use_first_nan = val;
    101 }
    102 
    103 static inline void set_no_signaling_nans(bool val, float_status *status)
    104 {
    105     status->no_signaling_nans = val;
    106 }
    107 
    108 static inline bool get_float_detect_tininess(float_status *status)
    109 {
    110     return status->tininess_before_rounding;
    111 }
    112 
    113 static inline FloatRoundMode get_float_rounding_mode(float_status *status)
    114 {
    115     return status->float_rounding_mode;
    116 }
    117 
    118 static inline int get_float_exception_flags(float_status *status)
    119 {
    120     return status->float_exception_flags;
    121 }
    122 
    123 static inline FloatX80RoundPrec
    124 get_floatx80_rounding_precision(float_status *status)
    125 {
    126     return status->floatx80_rounding_precision;
    127 }
    128 
    129 static inline bool get_flush_to_zero(float_status *status)
    130 {
    131     return status->flush_to_zero;
    132 }
    133 
    134 static inline bool get_flush_inputs_to_zero(float_status *status)
    135 {
    136     return status->flush_inputs_to_zero;
    137 }
    138 
    139 static inline bool get_default_nan_mode(float_status *status)
    140 {
    141     return status->default_nan_mode;
    142 }
    143 
    144 #endif /* SOFTFLOAT_HELPERS_H */