mirror of
https://github.com/jart/cosmopolitan.git
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7e0a09feec
This change ports APE Loader to Linux AARCH64, so that Raspberry Pi users can run programs like redbean, without the executable needing to modify itself. Progress has also slipped into this change on the issue of making progress better conforming to user expectations and industry standards regarding which symbols we're allowed to declare
80 lines
2.5 KiB
C
80 lines
2.5 KiB
C
/* clang-format off */
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/* ===-- mulxc3.c - Implement __mulxc3 -------------------------------------===
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*
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* The LLVM Compiler Infrastructure
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*
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* This file is dual licensed under the MIT and the University of Illinois Open
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* Source Licenses. See LICENSE.TXT for details.
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*
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* ===----------------------------------------------------------------------===
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*
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* This file implements __mulxc3 for the compiler_rt library.
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*
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* ===----------------------------------------------------------------------===
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*/
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__static_yoink("huge_compiler_rt_license");
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#if !_ARCH_PPC
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#include "third_party/compiler_rt/int_lib.h"
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#include "third_party/compiler_rt/int_math.h"
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/* Returns: the product of a + ib and c + id */
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COMPILER_RT_ABI Lcomplex
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__mulxc3(long double __a, long double __b, long double __c, long double __d)
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{
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long double __ac = __a * __c;
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long double __bd = __b * __d;
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long double __ad = __a * __d;
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long double __bc = __b * __c;
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Lcomplex z;
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COMPLEX_REAL(z) = __ac - __bd;
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COMPLEX_IMAGINARY(z) = __ad + __bc;
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if (crt_isnan(COMPLEX_REAL(z)) && crt_isnan(COMPLEX_IMAGINARY(z)))
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{
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int __recalc = 0;
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if (crt_isinf(__a) || crt_isinf(__b))
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{
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__a = crt_copysignl(crt_isinf(__a) ? 1 : 0, __a);
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__b = crt_copysignl(crt_isinf(__b) ? 1 : 0, __b);
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if (crt_isnan(__c))
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__c = crt_copysignl(0, __c);
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if (crt_isnan(__d))
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__d = crt_copysignl(0, __d);
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__recalc = 1;
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}
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if (crt_isinf(__c) || crt_isinf(__d))
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{
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__c = crt_copysignl(crt_isinf(__c) ? 1 : 0, __c);
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__d = crt_copysignl(crt_isinf(__d) ? 1 : 0, __d);
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if (crt_isnan(__a))
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__a = crt_copysignl(0, __a);
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if (crt_isnan(__b))
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__b = crt_copysignl(0, __b);
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__recalc = 1;
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}
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if (!__recalc && (crt_isinf(__ac) || crt_isinf(__bd) ||
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crt_isinf(__ad) || crt_isinf(__bc)))
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{
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if (crt_isnan(__a))
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__a = crt_copysignl(0, __a);
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if (crt_isnan(__b))
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__b = crt_copysignl(0, __b);
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if (crt_isnan(__c))
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__c = crt_copysignl(0, __c);
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if (crt_isnan(__d))
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__d = crt_copysignl(0, __d);
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__recalc = 1;
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}
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if (__recalc)
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{
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COMPLEX_REAL(z) = CRT_INFINITY * (__a * __c - __b * __d);
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COMPLEX_IMAGINARY(z) = CRT_INFINITY * (__a * __d + __b * __c);
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}
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}
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return z;
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}
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#endif
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