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| Original file line number | Diff line number | Diff line change |
|---|---|---|
| @@ -0,0 +1,67 @@ | ||
| /*-*- mode:c;indent-tabs-mode:nil;c-basic-offset:2;tab-width:8;coding:utf-8 -*-│ | ||
| │vi: set net ft=c ts=2 sts=2 sw=2 fenc=utf-8 :vi│ | ||
| ╚──────────────────────────────────────────────────────────────────────────────╝ | ||
| │ │ | ||
| │ Musl Libc │ | ||
| │ Copyright © 2005-2014 Rich Felker, et al. │ | ||
| │ │ | ||
| │ Permission is hereby granted, free of charge, to any person obtaining │ | ||
| │ a copy of this software and associated documentation files (the │ | ||
| │ "Software"), to deal in the Software without restriction, including │ | ||
| │ without limitation the rights to use, copy, modify, merge, publish, │ | ||
| │ distribute, sublicense, and/or sell copies of the Software, and to │ | ||
| │ permit persons to whom the Software is furnished to do so, subject to │ | ||
| │ the following conditions: │ | ||
| │ │ | ||
| │ The above copyright notice and this permission notice shall be │ | ||
| │ included in all copies or substantial portions of the Software. │ | ||
| │ │ | ||
| │ THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, │ | ||
| │ EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF │ | ||
| │ MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. │ | ||
| │ IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY │ | ||
| │ CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, │ | ||
| │ TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE │ | ||
| │ SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE. │ | ||
| │ │ | ||
| ╚─────────────────────────────────────────────────────────────────────────────*/ | ||
| #include "libc/math.h" | ||
|
|
||
| asm(".ident\t\"\\n\\n\ | ||
| Musl libc (MIT License)\\n\ | ||
| Copyright 2005-2014 Rich Felker, et. al.\""); | ||
| asm(".include \"libc/disclaimer.inc\""); | ||
| /* clang-format off */ | ||
|
|
||
| double modf(double x, double *iptr) | ||
| { | ||
| union {double f; uint64_t i;} u = {x}; | ||
| uint64_t mask; | ||
| int e = (int)(u.i>>52 & 0x7ff) - 0x3ff; | ||
|
|
||
| /* no fractional part */ | ||
| if (e >= 52) { | ||
| *iptr = x; | ||
| if (e == 0x400 && u.i<<12 != 0) /* nan */ | ||
| return x; | ||
| u.i &= 1ULL<<63; | ||
| return u.f; | ||
| } | ||
|
|
||
| /* no integral part*/ | ||
| if (e < 0) { | ||
| u.i &= 1ULL<<63; | ||
| *iptr = u.f; | ||
| return x; | ||
| } | ||
|
|
||
| mask = -1ULL>>12>>e; | ||
| if ((u.i & mask) == 0) { | ||
| *iptr = x; | ||
| u.i &= 1ULL<<63; | ||
| return u.f; | ||
| } | ||
| u.i &= ~mask; | ||
| *iptr = u.f; | ||
| return x - u.f; | ||
| } |
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| Original file line number | Diff line number | Diff line change |
|---|---|---|
| @@ -0,0 +1,67 @@ | ||
| /*-*- mode:c;indent-tabs-mode:nil;c-basic-offset:2;tab-width:8;coding:utf-8 -*-│ | ||
| │vi: set net ft=c ts=2 sts=2 sw=2 fenc=utf-8 :vi│ | ||
| ╚──────────────────────────────────────────────────────────────────────────────╝ | ||
| │ │ | ||
| │ Musl Libc │ | ||
| │ Copyright © 2005-2014 Rich Felker, et al. │ | ||
| │ │ | ||
| │ Permission is hereby granted, free of charge, to any person obtaining │ | ||
| │ a copy of this software and associated documentation files (the │ | ||
| │ "Software"), to deal in the Software without restriction, including │ | ||
| │ without limitation the rights to use, copy, modify, merge, publish, │ | ||
| │ distribute, sublicense, and/or sell copies of the Software, and to │ | ||
| │ permit persons to whom the Software is furnished to do so, subject to │ | ||
| │ the following conditions: │ | ||
| │ │ | ||
| │ The above copyright notice and this permission notice shall be │ | ||
| │ included in all copies or substantial portions of the Software. │ | ||
| │ │ | ||
| │ THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, │ | ||
| │ EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF │ | ||
| │ MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. │ | ||
| │ IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY │ | ||
| │ CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, │ | ||
| │ TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE │ | ||
| │ SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE. │ | ||
| │ │ | ||
| ╚─────────────────────────────────────────────────────────────────────────────*/ | ||
| #include "libc/math.h" | ||
|
|
||
| asm(".ident\t\"\\n\\n\ | ||
| Musl libc (MIT License)\\n\ | ||
| Copyright 2005-2014 Rich Felker, et. al.\""); | ||
| asm(".include \"libc/disclaimer.inc\""); | ||
| /* clang-format off */ | ||
|
|
||
| float modff(float x, float *iptr) | ||
| { | ||
| union {float f; uint32_t i;} u = {x}; | ||
| uint32_t mask; | ||
| int e = (int)(u.i>>23 & 0xff) - 0x7f; | ||
|
|
||
| /* no fractional part */ | ||
| if (e >= 23) { | ||
| *iptr = x; | ||
| if (e == 0x80 && u.i<<9 != 0) { /* nan */ | ||
| return x; | ||
| } | ||
| u.i &= 0x80000000; | ||
| return u.f; | ||
| } | ||
| /* no integral part */ | ||
| if (e < 0) { | ||
| u.i &= 0x80000000; | ||
| *iptr = u.f; | ||
| return x; | ||
| } | ||
|
|
||
| mask = 0x007fffff>>e; | ||
| if ((u.i & mask) == 0) { | ||
| *iptr = x; | ||
| u.i &= 0x80000000; | ||
| return u.f; | ||
| } | ||
| u.i &= ~mask; | ||
| *iptr = u.f; | ||
| return x - u.f; | ||
| } |
This file contains bidirectional Unicode text that may be interpreted or compiled differently than what appears below. To review, open the file in an editor that reveals hidden Unicode characters.
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| Original file line number | Diff line number | Diff line change |
|---|---|---|
| @@ -0,0 +1,79 @@ | ||
| /*-*- mode:c;indent-tabs-mode:nil;c-basic-offset:2;tab-width:8;coding:utf-8 -*-│ | ||
| │vi: set net ft=c ts=2 sts=2 sw=2 fenc=utf-8 :vi│ | ||
| ╚──────────────────────────────────────────────────────────────────────────────╝ | ||
| │ │ | ||
| │ Musl Libc │ | ||
| │ Copyright © 2005-2014 Rich Felker, et al. │ | ||
| │ │ | ||
| │ Permission is hereby granted, free of charge, to any person obtaining │ | ||
| │ a copy of this software and associated documentation files (the │ | ||
| │ "Software"), to deal in the Software without restriction, including │ | ||
| │ without limitation the rights to use, copy, modify, merge, publish, │ | ||
| │ distribute, sublicense, and/or sell copies of the Software, and to │ | ||
| │ permit persons to whom the Software is furnished to do so, subject to │ | ||
| │ the following conditions: │ | ||
| │ │ | ||
| │ The above copyright notice and this permission notice shall be │ | ||
| │ included in all copies or substantial portions of the Software. │ | ||
| │ │ | ||
| │ THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, │ | ||
| │ EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF │ | ||
| │ MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. │ | ||
| │ IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY │ | ||
| │ CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, │ | ||
| │ TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE │ | ||
| │ SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE. │ | ||
| │ │ | ||
| ╚─────────────────────────────────────────────────────────────────────────────*/ | ||
| #include "libc/math.h" | ||
|
|
||
| asm(".ident\t\"\\n\\n\ | ||
| Musl libc (MIT License)\\n\ | ||
| Copyright 2005-2014 Rich Felker, et. al.\""); | ||
| asm(".include \"libc/disclaimer.inc\""); | ||
| /* clang-format off */ | ||
|
|
||
| static const long double toint = 1/LDBL_EPSILON; | ||
|
|
||
| long double modfl(long double x, long double *iptr) | ||
| { | ||
| union { | ||
| long double f; | ||
| struct { | ||
| uint64_t m; | ||
| uint16_t se; | ||
| } i; | ||
| } u = {x}; | ||
| int e = (u.i.se & 0x7fff) - 0x3fff; | ||
| int s = u.i.se >> 15; | ||
| long double absx; | ||
| long double y; | ||
|
|
||
| /* no fractional part */ | ||
| if (e >= LDBL_MANT_DIG-1) { | ||
| *iptr = x; | ||
| if (isnan(x)) | ||
| return x; | ||
| return s ? -0.0 : 0.0; | ||
| } | ||
|
|
||
| /* no integral part*/ | ||
| if (e < 0) { | ||
| *iptr = s ? -0.0 : 0.0; | ||
| return x; | ||
| } | ||
|
|
||
| /* raises spurious inexact */ | ||
| absx = s ? -x : x; | ||
| y = absx + toint - toint - absx; | ||
| if (y == 0) { | ||
| *iptr = x; | ||
| return s ? -0.0 : 0.0; | ||
| } | ||
| if (y > 0) | ||
| y -= 1; | ||
| if (s) | ||
| y = -y; | ||
| *iptr = x + y; | ||
| return -y; | ||
| } |