26 lines
717 B
Zig
26 lines
717 B
Zig
const udivmod = @import("udivmod.zig").udivmod;
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const builtin = @import("builtin");
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pub extern fn __divti3(a: i128, b: i128) i128 {
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@setRuntimeSafety(builtin.is_test);
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const s_a = a >> (i128.bit_count - 1);
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const s_b = b >> (i128.bit_count - 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 = @Vector(2, u64);
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pub extern fn __divti3_windows_x86_64(a: v128, b: v128) v128 {
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return @bitCast(v128, @inlineCall(__divti3, @bitCast(i128, a), @bitCast(i128, b)));
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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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