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d29871977f
We already have a LICENSE file that covers the Zig Standard Library. We no longer need to remind everyone that the license is MIT in every single file. Previously this was introduced to clarify the situation for a fork of Zig that made Zig's LICENSE file harder to find, and replaced it with their own license that required annual payments to their company. However that fork now appears to be dead. So there is no need to reinforce the copyright notice in every single file.
33 lines
1.1 KiB
Zig
33 lines
1.1 KiB
Zig
// Ported from:
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//
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// https://github.com/llvm/llvm-project/blob/2ffb1b0413efa9a24eb3c49e710e36f92e2cb50b/compiler-rt/lib/builtins/modti3.c
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const udivmod = @import("udivmod.zig").udivmod;
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const builtin = @import("builtin");
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const compiler_rt = @import("../compiler_rt.zig");
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pub fn __modti3(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); // s = a < 0 ? -1 : 0
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const s_b = b >> (128 - 1); // s = b < 0 ? -1 : 0
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const an = (a ^ s_a) -% s_a; // negate if s == -1
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const bn = (b ^ s_b) -% s_b; // negate if s == -1
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var r: u128 = undefined;
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_ = udivmod(u128, @bitCast(u128, an), @bitCast(u128, bn), &r);
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return (@bitCast(i128, r) ^ s_a) -% s_a; // negate if s == -1
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}
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const v128 = @import("std").meta.Vector(2, u64);
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pub fn __modti3_windows_x86_64(a: v128, b: v128) callconv(.C) v128 {
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return @bitCast(v128, @call(.{ .modifier = .always_inline }, __modti3, .{
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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 modti3" {
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_ = @import("modti3_test.zig");
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}
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