text: // SPDX-License-Identifier: MIT
  // Copyright (c) 2015-2020 Zig Contributors
  // This file is part of [zig](https://ziglang.org/), which is MIT licensed.
  // The MIT license requires this copyright notice to be included in all copies
  // and substantial portions of the software.
  // Ported from:
  //
  // https://github.com/llvm/llvm-project/blob/2ffb1b0413efa9a24eb3c49e710e36f92e2cb50b/compiler-rt/lib/builtins/modti3.c
  
  const udivmod = @import("udivmod.zig").udivmod;
  const builtin = @import("builtin");
  const compiler_rt = @import("../compiler_rt.zig");
  
  pub fn __modti3(a: i128, b: i128) callconv(.C) i128 {
      @setRuntimeSafety(builtin.is_test);
  
      const s_a = a >> (128 - 1); // s = a < 0 ? -1 : 0
      const s_b = b >> (128 - 1); // s = b < 0 ? -1 : 0
  
      const an = (a ^ s_a) -% s_a; // negate if s == -1
      const bn = (b ^ s_b) -% s_b; // negate if s == -1
  
      var r: u128 = undefined;
      _ = udivmod(u128, @bitCast(u128, an), @bitCast(u128, bn), &r);
      return (@bitCast(i128, r) ^ s_a) -% s_a; // negate if s == -1
  }
  
  const v128 = @import("std").meta.Vector(2, u64);
  pub fn __modti3_windows_x86_64(a: v128, b: v128) callconv(.C) v128 {
      return @bitCast(v128, @call(.{ .modifier = .always_inline }, __modti3, .{
          @bitCast(i128, a),
          @bitCast(i128, b),
      }));
  }
  
  test "import modti3" {
      _ = @import("modti3_test.zig");
  }
  