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qemu with hax to log dma reads & writes
jcs.org/2018/11/12/vfio
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===============================================================================
24This C header file is part of the SoftFloat IEC/IEEE Floating-point
25Arithmetic Package, Release 2a.
26
27Written by John R. Hauser. This work was made possible in part by the
28International Computer Science Institute, located at Suite 600, 1947 Center
29Street, Berkeley, California 94704. Funding was partially provided by the
30National Science Foundation under grant MIP-9311980. The original version
31of this code was written as part of a project to build a fixed-point vector
32processor in collaboration with the University of California at Berkeley,
33overseen by Profs. Nelson Morgan and John Wawrzynek. More information
34is available through the Web page `http://HTTP.CS.Berkeley.EDU/~jhauser/
35arithmetic/SoftFloat.html'.
36
37THIS SOFTWARE IS DISTRIBUTED AS IS, FOR FREE. Although reasonable effort
38has been made to avoid it, THIS SOFTWARE MAY CONTAIN FAULTS THAT WILL AT
39TIMES RESULT IN INCORRECT BEHAVIOR. USE OF THIS SOFTWARE IS RESTRICTED TO
40PERSONS AND ORGANIZATIONS WHO CAN AND WILL TAKE FULL RESPONSIBILITY FOR ANY
41AND ALL LOSSES, COSTS, OR OTHER PROBLEMS ARISING FROM ITS USE.
42
43Derivative works are acceptable, even for commercial purposes, so long as
44(1) they include prominent notice that the work is derivative, and (2) they
45include prominent notice akin to these four paragraphs for those parts of
46this 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
56static inline void set_float_detect_tininess(bool val, float_status *status)
57{
58 status->tininess_before_rounding = val;
59}
60
61static inline void set_float_rounding_mode(FloatRoundMode val,
62 float_status *status)
63{
64 status->float_rounding_mode = val;
65}
66
67static inline void set_float_exception_flags(int val, float_status *status)
68{
69 status->float_exception_flags = val;
70}
71
72static inline void set_floatx80_rounding_precision(int val,
73 float_status *status)
74{
75 status->floatx80_rounding_precision = val;
76}
77
78static inline void set_flush_to_zero(bool val, float_status *status)
79{
80 status->flush_to_zero = val;
81}
82
83static inline void set_flush_inputs_to_zero(bool val, float_status *status)
84{
85 status->flush_inputs_to_zero = val;
86}
87
88static inline void set_default_nan_mode(bool val, float_status *status)
89{
90 status->default_nan_mode = val;
91}
92
93static inline void set_snan_bit_is_one(bool val, float_status *status)
94{
95 status->snan_bit_is_one = val;
96}
97
98static inline bool get_float_detect_tininess(float_status *status)
99{
100 return status->tininess_before_rounding;
101}
102
103static inline FloatRoundMode get_float_rounding_mode(float_status *status)
104{
105 return status->float_rounding_mode;
106}
107
108static inline int get_float_exception_flags(float_status *status)
109{
110 return status->float_exception_flags;
111}
112
113static inline int get_floatx80_rounding_precision(float_status *status)
114{
115 return status->floatx80_rounding_precision;
116}
117
118static inline bool get_flush_to_zero(float_status *status)
119{
120 return status->flush_to_zero;
121}
122
123static inline bool get_flush_inputs_to_zero(float_status *status)
124{
125 return status->flush_inputs_to_zero;
126}
127
128static inline bool get_default_nan_mode(float_status *status)
129{
130 return status->default_nan_mode;
131}
132
133#endif /* _SOFTFLOAT_HELPERS_H_ */