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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
66 lines
2.4 KiB
C
66 lines
2.4 KiB
C
/* clang-format off */
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/*===-- divsc3.c - Implement __divsc3 -------------------------------------===
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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 __divsc3 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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#define SINGLE_PRECISION
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#include "third_party/compiler_rt/fp_lib.inc"
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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 quotient of (a + ib) / (c + id) */
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COMPILER_RT_ABI Fcomplex
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__divsc3(float __a, float __b, float __c, float __d)
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{
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int __ilogbw = 0;
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float __logbw =
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__compiler_rt_logbf(crt_fmaxf(crt_fabsf(__c), crt_fabsf(__d)));
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if (crt_isfinite(__logbw))
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{
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__ilogbw = (int)__logbw;
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__c = crt_scalbnf(__c, -__ilogbw);
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__d = crt_scalbnf(__d, -__ilogbw);
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}
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float __denom = __c * __c + __d * __d;
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Fcomplex z;
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COMPLEX_REAL(z) = crt_scalbnf((__a * __c + __b * __d) / __denom, -__ilogbw);
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COMPLEX_IMAGINARY(z) = crt_scalbnf((__b * __c - __a * __d) / __denom, -__ilogbw);
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if (crt_isnan(COMPLEX_REAL(z)) && crt_isnan(COMPLEX_IMAGINARY(z)))
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{
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if ((__denom == 0) && (!crt_isnan(__a) || !crt_isnan(__b)))
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{
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COMPLEX_REAL(z) = crt_copysignf(CRT_INFINITY, __c) * __a;
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COMPLEX_IMAGINARY(z) = crt_copysignf(CRT_INFINITY, __c) * __b;
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}
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else if ((crt_isinf(__a) || crt_isinf(__b)) &&
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crt_isfinite(__c) && crt_isfinite(__d))
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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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COMPLEX_REAL(z) = CRT_INFINITY * (__a * __c + __b * __d);
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COMPLEX_IMAGINARY(z) = CRT_INFINITY * (__b * __c - __a * __d);
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}
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else if (crt_isinf(__logbw) && __logbw > 0 &&
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crt_isfinite(__a) && crt_isfinite(__b))
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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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COMPLEX_REAL(z) = 0 * (__a * __c + __b * __d);
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COMPLEX_IMAGINARY(z) = 0 * (__b * __c - __a * __d);
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}
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}
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return z;
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}
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