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
76 lines
2.5 KiB
C
76 lines
2.5 KiB
C
/* clang-format off */
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/* ===-- mulsc3.c - Implement __mulsc3 -------------------------------------===
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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 __mulsc3 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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#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 Fcomplex
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__mulsc3(float __a, float __b, float __c, float __d)
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{
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float __ac = __a * __c;
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float __bd = __b * __d;
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float __ad = __a * __d;
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float __bc = __b * __c;
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Fcomplex 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_copysignf(crt_isinf(__a) ? 1 : 0, __a);
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__b = crt_copysignf(crt_isinf(__b) ? 1 : 0, __b);
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if (crt_isnan(__c))
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__c = crt_copysignf(0, __c);
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if (crt_isnan(__d))
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__d = crt_copysignf(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_copysignf(crt_isinf(__c) ? 1 : 0, __c);
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__d = crt_copysignf(crt_isinf(__d) ? 1 : 0, __d);
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if (crt_isnan(__a))
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__a = crt_copysignf(0, __a);
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if (crt_isnan(__b))
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__b = crt_copysignf(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_copysignf(0, __a);
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if (crt_isnan(__b))
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__b = crt_copysignf(0, __b);
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if (crt_isnan(__c))
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__c = crt_copysignf(0, __c);
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if (crt_isnan(__d))
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__d = crt_copysignf(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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