/* clang-format off */ /* ===-- divdi3.c - Implement __divdi3 -------------------------------------=== * * 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 __divdi3 for the compiler_rt library. * * ===----------------------------------------------------------------------=== */ STATIC_YOINK("huge_compiler_rt_license"); #include "third_party/compiler_rt/int_lib.h" /* Returns: a / b */ COMPILER_RT_ABI di_int __divdi3(di_int a, di_int b) { const int bits_in_dword_m1 = (int)(sizeof(di_int) * CHAR_BIT) - 1; di_int s_a = a >> bits_in_dword_m1; /* s_a = a < 0 ? -1 : 0 */ di_int s_b = b >> bits_in_dword_m1; /* s_b = b < 0 ? -1 : 0 */ a = (a ^ s_a) - s_a; /* negate if s_a == -1 */ b = (b ^ s_b) - s_b; /* negate if s_b == -1 */ s_a ^= s_b; /*sign of quotient */ return (__udivmoddi4(a, b, (du_int*)0) ^ s_a) - s_a; /* negate if s_a == -1 */ }