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author | Anton Samokhvalov <pg83@yandex.ru> | 2022-02-10 16:45:15 +0300 |
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committer | Daniil Cherednik <dcherednik@yandex-team.ru> | 2022-02-10 16:45:15 +0300 |
commit | 72cb13b4aff9bc9cf22e49251bc8fd143f82538f (patch) | |
tree | da2c34829458c7d4e74bdfbdf85dff449e9e7fb8 /contrib/libs/cxxsupp/builtins/divdc3.c | |
parent | 778e51ba091dc39e7b7fcab2b9cf4dbedfb6f2b5 (diff) | |
download | ydb-72cb13b4aff9bc9cf22e49251bc8fd143f82538f.tar.gz |
Restoring authorship annotation for Anton Samokhvalov <pg83@yandex.ru>. Commit 1 of 2.
Diffstat (limited to 'contrib/libs/cxxsupp/builtins/divdc3.c')
-rw-r--r-- | contrib/libs/cxxsupp/builtins/divdc3.c | 120 |
1 files changed, 60 insertions, 60 deletions
diff --git a/contrib/libs/cxxsupp/builtins/divdc3.c b/contrib/libs/cxxsupp/builtins/divdc3.c index 3c88390b5e..57f4ce4c3c 100644 --- a/contrib/libs/cxxsupp/builtins/divdc3.c +++ b/contrib/libs/cxxsupp/builtins/divdc3.c @@ -1,60 +1,60 @@ -/* ===-- divdc3.c - Implement __divdc3 -------------------------------------=== - * - * The LLVM Compiler Infrastructure - * - * This file is dual licensed under the MIT and the University of Illinois Open - * Source Licenses. See LICENSE.TXT for details. - * - * ===----------------------------------------------------------------------=== - * - * This file implements __divdc3 for the compiler_rt library. - * - * ===----------------------------------------------------------------------=== - */ - -#include "int_lib.h" -#include "int_math.h" - -/* Returns: the quotient of (a + ib) / (c + id) */ - -COMPILER_RT_ABI Dcomplex -__divdc3(double __a, double __b, double __c, double __d) -{ - int __ilogbw = 0; - double __logbw = crt_logb(crt_fmax(crt_fabs(__c), crt_fabs(__d))); - if (crt_isfinite(__logbw)) - { - __ilogbw = (int)__logbw; - __c = crt_scalbn(__c, -__ilogbw); - __d = crt_scalbn(__d, -__ilogbw); - } - double __denom = __c * __c + __d * __d; - Dcomplex z; - COMPLEX_REAL(z) = crt_scalbn((__a * __c + __b * __d) / __denom, -__ilogbw); - COMPLEX_IMAGINARY(z) = crt_scalbn((__b * __c - __a * __d) / __denom, -__ilogbw); - if (crt_isnan(COMPLEX_REAL(z)) && crt_isnan(COMPLEX_IMAGINARY(z))) - { - if ((__denom == 0.0) && (!crt_isnan(__a) || !crt_isnan(__b))) - { - COMPLEX_REAL(z) = crt_copysign(CRT_INFINITY, __c) * __a; - COMPLEX_IMAGINARY(z) = crt_copysign(CRT_INFINITY, __c) * __b; - } - else if ((crt_isinf(__a) || crt_isinf(__b)) && - crt_isfinite(__c) && crt_isfinite(__d)) - { - __a = crt_copysign(crt_isinf(__a) ? 1.0 : 0.0, __a); - __b = crt_copysign(crt_isinf(__b) ? 1.0 : 0.0, __b); - COMPLEX_REAL(z) = CRT_INFINITY * (__a * __c + __b * __d); - COMPLEX_IMAGINARY(z) = CRT_INFINITY * (__b * __c - __a * __d); - } - else if (crt_isinf(__logbw) && __logbw > 0.0 && - crt_isfinite(__a) && crt_isfinite(__b)) - { - __c = crt_copysign(crt_isinf(__c) ? 1.0 : 0.0, __c); - __d = crt_copysign(crt_isinf(__d) ? 1.0 : 0.0, __d); - COMPLEX_REAL(z) = 0.0 * (__a * __c + __b * __d); - COMPLEX_IMAGINARY(z) = 0.0 * (__b * __c - __a * __d); - } - } - return z; -} +/* ===-- divdc3.c - Implement __divdc3 -------------------------------------=== + * + * The LLVM Compiler Infrastructure + * + * This file is dual licensed under the MIT and the University of Illinois Open + * Source Licenses. See LICENSE.TXT for details. + * + * ===----------------------------------------------------------------------=== + * + * This file implements __divdc3 for the compiler_rt library. + * + * ===----------------------------------------------------------------------=== + */ + +#include "int_lib.h" +#include "int_math.h" + +/* Returns: the quotient of (a + ib) / (c + id) */ + +COMPILER_RT_ABI Dcomplex +__divdc3(double __a, double __b, double __c, double __d) +{ + int __ilogbw = 0; + double __logbw = crt_logb(crt_fmax(crt_fabs(__c), crt_fabs(__d))); + if (crt_isfinite(__logbw)) + { + __ilogbw = (int)__logbw; + __c = crt_scalbn(__c, -__ilogbw); + __d = crt_scalbn(__d, -__ilogbw); + } + double __denom = __c * __c + __d * __d; + Dcomplex z; + COMPLEX_REAL(z) = crt_scalbn((__a * __c + __b * __d) / __denom, -__ilogbw); + COMPLEX_IMAGINARY(z) = crt_scalbn((__b * __c - __a * __d) / __denom, -__ilogbw); + if (crt_isnan(COMPLEX_REAL(z)) && crt_isnan(COMPLEX_IMAGINARY(z))) + { + if ((__denom == 0.0) && (!crt_isnan(__a) || !crt_isnan(__b))) + { + COMPLEX_REAL(z) = crt_copysign(CRT_INFINITY, __c) * __a; + COMPLEX_IMAGINARY(z) = crt_copysign(CRT_INFINITY, __c) * __b; + } + else if ((crt_isinf(__a) || crt_isinf(__b)) && + crt_isfinite(__c) && crt_isfinite(__d)) + { + __a = crt_copysign(crt_isinf(__a) ? 1.0 : 0.0, __a); + __b = crt_copysign(crt_isinf(__b) ? 1.0 : 0.0, __b); + COMPLEX_REAL(z) = CRT_INFINITY * (__a * __c + __b * __d); + COMPLEX_IMAGINARY(z) = CRT_INFINITY * (__b * __c - __a * __d); + } + else if (crt_isinf(__logbw) && __logbw > 0.0 && + crt_isfinite(__a) && crt_isfinite(__b)) + { + __c = crt_copysign(crt_isinf(__c) ? 1.0 : 0.0, __c); + __d = crt_copysign(crt_isinf(__d) ? 1.0 : 0.0, __d); + COMPLEX_REAL(z) = 0.0 * (__a * __c + __b * __d); + COMPLEX_IMAGINARY(z) = 0.0 * (__b * __c - __a * __d); + } + } + return z; +} |