ReactOS 0.4.15-dev-8349-g6f277e9
log_special.c
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1
2/*******************************************************************************
3MIT License
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5
6Copyright (c) 2002-2019 Advanced Micro Devices, Inc.
7
8Permission is hereby granted, free of charge, to any person obtaining a copy
9of this Software and associated documentaon files (the "Software"), to deal
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26
27#include <fpieee.h>
28#include <excpt.h>
29#include <float.h>
30#include <math.h>
31#include <errno.h>
32
33#include "libm_new.h"
34
35// y = log10f(x)
36// y = log10(x)
37// y = logf(x)
38// y = log(x)
39
40// these codes and the ones in the related .asm files have to match
41#define LOG_X_ZERO 1
42#define LOG_X_NEG 2
43#define LOG_X_NAN 3
44
45static float _logf_special_common(float x, float y, U32 code, unsigned int op, char *name)
46{
47 switch(code)
48 {
49 case LOG_X_ZERO:
50 {
51 UT64 ym; ym.u64 = 0; ym.f32[0] = y;
53 }
54 break;
55
56 case LOG_X_NEG:
57 {
58 UT64 ym; ym.u64 = 0; ym.f32[0] = y;
60 }
61 break;
62
63 case LOG_X_NAN:
64 {
65 unsigned int is_snan;
66 UT32 xm; UT64 ym;
67 xm.f32 = x;
68 is_snan = (((xm.u32 & QNAN_MASK_32) == QNAN_SET_32) ? 0 : 1);
69 ym.u64 = 0; ym.f32[0] = y;
70
71 if(is_snan)
72 {
74 }
75 else
76 {
77 _handle_errorf(name, op, ym.u64, _DOMAIN, 0, EDOM, x, 0.0, 1);
78 }
79 }
80 break;
81 }
82
83 return y;
84}
85
86float _logf_special(float x, float y, U32 code)
87{
88 return _logf_special_common(x, y, code, _FpCodeLog, "logf");
89}
90
91float _log10f_special(float x, float y, U32 code)
92{
93 return _logf_special_common(x, y, code, _FpCodeLog10, "log10f");
94}
95
96static double _log_special_common(double x, double y, U32 code, unsigned int op, char *name)
97{
98 switch(code)
99 {
100 case LOG_X_ZERO:
101 {
102 UT64 ym; ym.f64 = y;
104 }
105 break;
106
107 case LOG_X_NEG:
108 {
109 UT64 ym; ym.f64 = y;
111 }
112 break;
113
114 case LOG_X_NAN:
115 {
116 UT64 ym; ym.f64 = y;
117 _handle_error(name, op, ym.u64, _DOMAIN, 0, EDOM, x, 0.0, 1);
118 }
119 break;
120 }
121
122 return y;
123}
124
125double _log_special(double x, double y, U32 code)
126{
127 return _log_special_common(x, y, code, _FpCodeLog, "log");
128}
129
130double _log10_special(double x, double y, U32 code)
131{
132 return _log_special_common(x, y, code, _FpCodeLog10, "log10");
133}
double __cdecl _handle_error(char *fname, int opcode, unsigned long long value, int type, int flags, int error, double arg1, double arg2, int nargs)
Handles an error condition.
Definition: _handle_error.c:34
float __cdecl _handle_errorf(char *fname, int opcode, unsigned long long value, int type, int flags, int error, float arg1, float arg2, int nargs)
Definition: _handle_error.c:56
#define ERANGE
Definition: acclib.h:92
UINT op
Definition: effect.c:236
#define EDOM
Definition: errno.h:39
@ _FpCodeLog10
Definition: fpieee.h:56
@ _FpCodeLog
Definition: fpieee.h:55
GLint GLint GLint GLint GLint x
Definition: gl.h:1548
GLint GLint GLint GLint GLint GLint y
Definition: gl.h:1548
#define _DOMAIN
Definition: math.h:39
#define _SING
Definition: math.h:40
#define AMD_F_DIVBYZERO
Definition: libm_new.h:85
#define QNAN_MASK_32
Definition: libm_new.h:61
#define QNAN_SET_32
Definition: libm_new.h:71
#define AMD_F_INVALID
Definition: libm_new.h:86
#define LOG_X_NEG
Definition: log_special.c:42
double _log10_special(double x, double y, U32 code)
Definition: log_special.c:130
#define LOG_X_NAN
Definition: log_special.c:43
double _log_special(double x, double y, U32 code)
Definition: log_special.c:125
static double _log_special_common(double x, double y, U32 code, unsigned int op, char *name)
Definition: log_special.c:96
float _logf_special(float x, float y, U32 code)
Definition: log_special.c:86
float _log10f_special(float x, float y, U32 code)
Definition: log_special.c:91
#define LOG_X_ZERO
Definition: log_special.c:41
static float _logf_special_common(float x, float y, U32 code, unsigned int op, char *name)
Definition: log_special.c:45
Definition: inflate.c:139
Definition: name.c:39
Definition: libm_new.h:41
F32 f32
Definition: libm_new.h:42
U32 u32
Definition: libm_new.h:43
Definition: libm_new.h:47
F64 f64
Definition: libm_new.h:48
U64 u64
Definition: libm_new.h:49
F32 f32[2]
Definition: libm_new.h:51
unsigned int U32
Definition: xxhash.c:195