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author | Alexey Samsonov <samsonov@google.com> | 2014-02-14 09:20:33 +0000 |
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committer | Alexey Samsonov <samsonov@google.com> | 2014-02-14 09:20:33 +0000 |
commit | 53aa4fda49f94920139300227786ac47c393f1ce (patch) | |
tree | 6d022d04ee279fe1afd89668f346e28a9e3e1559 /lib/builtins/mulxc3.c | |
parent | 6d999e478fecb10dc43f20b85385d25cc239db0a (diff) |
Move original compiler-rt functions (libgcc replacement) to lib/builtins directory
git-svn-id: https://llvm.org/svn/llvm-project/compiler-rt/trunk@201393 91177308-0d34-0410-b5e6-96231b3b80d8
Diffstat (limited to 'lib/builtins/mulxc3.c')
-rw-r--r-- | lib/builtins/mulxc3.c | 77 |
1 files changed, 77 insertions, 0 deletions
diff --git a/lib/builtins/mulxc3.c b/lib/builtins/mulxc3.c new file mode 100644 index 000000000..cec057368 --- /dev/null +++ b/lib/builtins/mulxc3.c @@ -0,0 +1,77 @@ +/* ===-- mulxc3.c - Implement __mulxc3 -------------------------------------=== + * + * 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 __mulxc3 for the compiler_rt library. + * + * ===----------------------------------------------------------------------=== + */ + +#if !_ARCH_PPC + +#include "int_lib.h" +#include "int_math.h" + +/* Returns: the product of a + ib and c + id */ + +long double _Complex +__mulxc3(long double __a, long double __b, long double __c, long double __d) +{ + long double __ac = __a * __c; + long double __bd = __b * __d; + long double __ad = __a * __d; + long double __bc = __b * __c; + long double _Complex z; + __real__ z = __ac - __bd; + __imag__ z = __ad + __bc; + if (crt_isnan(__real__ z) && crt_isnan(__imag__ z)) + { + int __recalc = 0; + if (crt_isinf(__a) || crt_isinf(__b)) + { + __a = crt_copysignl(crt_isinf(__a) ? 1 : 0, __a); + __b = crt_copysignl(crt_isinf(__b) ? 1 : 0, __b); + if (crt_isnan(__c)) + __c = crt_copysignl(0, __c); + if (crt_isnan(__d)) + __d = crt_copysignl(0, __d); + __recalc = 1; + } + if (crt_isinf(__c) || crt_isinf(__d)) + { + __c = crt_copysignl(crt_isinf(__c) ? 1 : 0, __c); + __d = crt_copysignl(crt_isinf(__d) ? 1 : 0, __d); + if (crt_isnan(__a)) + __a = crt_copysignl(0, __a); + if (crt_isnan(__b)) + __b = crt_copysignl(0, __b); + __recalc = 1; + } + if (!__recalc && (crt_isinf(__ac) || crt_isinf(__bd) || + crt_isinf(__ad) || crt_isinf(__bc))) + { + if (crt_isnan(__a)) + __a = crt_copysignl(0, __a); + if (crt_isnan(__b)) + __b = crt_copysignl(0, __b); + if (crt_isnan(__c)) + __c = crt_copysignl(0, __c); + if (crt_isnan(__d)) + __d = crt_copysignl(0, __d); + __recalc = 1; + } + if (__recalc) + { + __real__ z = CRT_INFINITY * (__a * __c - __b * __d); + __imag__ z = CRT_INFINITY * (__a * __d + __b * __c); + } + } + return z; +} + +#endif |