zig/lib/std/special/compiler_rt/fixunstfsi_test.zig

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Zig

const __fixunstfsi = @import("fixunstfsi.zig").__fixunstfsi;
const testing = @import("std").testing;
fn test__fixunstfsi(a: f128, expected: u32) void {
const x = __fixunstfsi(a);
testing.expect(x == expected);
}
const inf128 = @bitCast(f128, @as(u128, 0x7fff0000000000000000000000000000));
test "fixunstfsi" {
test__fixunstfsi(inf128, 0xffffffff);
test__fixunstfsi(0, 0x0);
test__fixunstfsi(0x1.23456789abcdefp+5, 0x24);
test__fixunstfsi(0x1.23456789abcdefp-3, 0x0);
test__fixunstfsi(0x1.23456789abcdefp+20, 0x123456);
test__fixunstfsi(0x1.23456789abcdefp+40, 0xffffffff);
test__fixunstfsi(0x1.23456789abcdefp+256, 0xffffffff);
test__fixunstfsi(-0x1.23456789abcdefp+3, 0x0);
test__fixunstfsi(0x1.p+32, 0xFFFFFFFF);
}