1 2 /******************************************************************************* 3 MIT License 4 ----------- 5 6 Copyright (c) 2002-2019 Advanced Micro Devices, Inc. 7 8 Permission is hereby granted, free of charge, to any person obtaining a copy 9 of this Software and associated documentaon files (the "Software"), to deal 10 in the Software without restriction, including without limitation the rights 11 to use, copy, modify, merge, publish, distribute, sublicense, and/or sell 12 copies of the Software, and to permit persons to whom the Software is 13 furnished to do so, subject to the following conditions: 14 15 The above copyright notice and this permission notice shall be included in 16 all copies or substantial portions of the Software. 17 18 THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR 19 IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, 20 FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE 21 AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER 22 LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, 23 OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN 24 THE SOFTWARE. 25 *******************************************************************************/ 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 45 static 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; 52 _handle_errorf(name, op, ym.u64, _SING, AMD_F_DIVBYZERO, ERANGE, x, 0.0, 1); 53 } 54 break; 55 56 case LOG_X_NEG: 57 { 58 UT64 ym; ym.u64 = 0; ym.f32[0] = y; 59 _handle_errorf(name, op, ym.u64, _DOMAIN, AMD_F_INVALID, EDOM, x, 0.0, 1); 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 { 73 _handle_errorf(name, op, ym.u64, _DOMAIN, AMD_F_INVALID, EDOM, x, 0.0, 1); 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 86 float _logf_special(float x, float y, U32 code) 87 { 88 return _logf_special_common(x, y, code, _FpCodeLog, "logf"); 89 } 90 91 float _log10f_special(float x, float y, U32 code) 92 { 93 return _logf_special_common(x, y, code, _FpCodeLog10, "log10f"); 94 } 95 96 static 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; 103 _handle_error(name, op, ym.u64, _SING, AMD_F_DIVBYZERO, ERANGE, x, 0.0, 1); 104 } 105 break; 106 107 case LOG_X_NEG: 108 { 109 UT64 ym; ym.f64 = y; 110 _handle_error(name, op, ym.u64, _DOMAIN, AMD_F_INVALID, EDOM, x, 0.0, 1); 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 } 124 125 double _log_special(double x, double y, U32 code) 126 { 127 return _log_special_common(x, y, code, _FpCodeLog, "log"); 128 } 129 130 double _log10_special(double x, double y, U32 code) 131 { 132 return _log_special_common(x, y, code, _FpCodeLog10, "log10"); 133 } 134