include/fpu/softfloat-helpers.h

   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(int 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 int get_floatx80_rounding_precision(float_status *status)
 124 {
 125     return status->floatx80_rounding_precision;
 126 }
 127
 128 static inline bool get_flush_to_zero(float_status *status)
 129 {
 130     return status->flush_to_zero;
 131 }
 132
 133 static inline bool get_flush_inputs_to_zero(float_status *status)
 134 {
 135     return status->flush_inputs_to_zero;
 136 }
 137
 138 static inline bool get_default_nan_mode(float_status *status)
 139 {
 140     return status->default_nan_mode;
 141 }
 142
 143 #endif /* _SOFTFLOAT_HELPERS_H_ */