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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
32 lines
1.2 KiB
C
32 lines
1.2 KiB
C
/* clang-format off */
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/* ===-- divdi3.c - Implement __divdi3 -------------------------------------===
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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 __divdi3 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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/* Returns: a / b */
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COMPILER_RT_ABI di_int
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__divdi3(di_int a, di_int b)
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{
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const int bits_in_dword_m1 = (int)(sizeof(di_int) * CHAR_BIT) - 1;
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di_int s_a = a >> bits_in_dword_m1; /* s_a = a < 0 ? -1 : 0 */
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di_int s_b = b >> bits_in_dword_m1; /* s_b = b < 0 ? -1 : 0 */
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a = (a ^ s_a) - s_a; /* negate if s_a == -1 */
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b = (b ^ s_b) - s_b; /* negate if s_b == -1 */
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s_a ^= s_b; /*sign of quotient */
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return (__udivmoddi4(a, b, (du_int*)0) ^ s_a) - s_a; /* negate if s_a == -1 */
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}
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