34 lines
1.0 KiB
Zig
34 lines
1.0 KiB
Zig
// SPDX-License-Identifier: MIT
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// Copyright (c) 2015-2020 Zig Contributors
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// This file is part of [zig](https://ziglang.org/), which is MIT licensed.
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// The MIT license requires this copyright notice to be included in all copies
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// and substantial portions of the software.
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const udivmod = @import("udivmod.zig").udivmod;
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const builtin = @import("builtin");
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pub fn __divti3(a: i128, b: i128) callconv(.C) i128 {
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@setRuntimeSafety(builtin.is_test);
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const s_a = a >> (128 - 1);
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const s_b = b >> (128 - 1);
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const an = (a ^ s_a) -% s_a;
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const bn = (b ^ s_b) -% s_b;
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const r = udivmod(u128, @bitCast(u128, an), @bitCast(u128, bn), null);
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const s = s_a ^ s_b;
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return (@bitCast(i128, r) ^ s) -% s;
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}
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const v128 = @import("std").meta.Vector(2, u64);
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pub fn __divti3_windows_x86_64(a: v128, b: v128) callconv(.C) v128 {
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return @bitCast(v128, @call(.{ .modifier = .always_inline }, __divti3, .{
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@bitCast(i128, a),
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@bitCast(i128, b),
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}));
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}
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test "import divti3" {
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_ = @import("divti3_test.zig");
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}
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