61 lines
2.3 KiB
Zig
61 lines
2.3 KiB
Zig
const __floattisf = @import("floattisf.zig").__floattisf;
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const assert = @import("std").debug.assert;
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fn test__floattisf(a: i128, expected: f32) void {
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const x = __floattisf(a);
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assert(x == expected);
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}
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test "floattisf" {
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test__floattisf(0, 0.0);
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test__floattisf(1, 1.0);
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test__floattisf(2, 2.0);
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test__floattisf(-1, -1.0);
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test__floattisf(-2, -2.0);
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test__floattisf(0x7FFFFF8000000000, 0x1.FFFFFEp+62);
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test__floattisf(0x7FFFFF0000000000, 0x1.FFFFFCp+62);
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test__floattisf(make_ti(0xFFFFFFFFFFFFFFFF, 0x8000008000000000), -0x1.FFFFFEp+62);
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test__floattisf(make_ti(0xFFFFFFFFFFFFFFFF, 0x8000010000000000), -0x1.FFFFFCp+62);
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test__floattisf(make_ti(0xFFFFFFFFFFFFFFFF, 0x8000000000000000), -0x1.000000p+63);
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test__floattisf(make_ti(0xFFFFFFFFFFFFFFFF, 0x8000000000000001), -0x1.000000p+63);
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test__floattisf(0x0007FB72E8000000, 0x1.FEDCBAp+50);
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test__floattisf(0x0007FB72EA000000, 0x1.FEDCBAp+50);
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test__floattisf(0x0007FB72EB000000, 0x1.FEDCBAp+50);
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test__floattisf(0x0007FB72EBFFFFFF, 0x1.FEDCBAp+50);
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test__floattisf(0x0007FB72EC000000, 0x1.FEDCBCp+50);
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test__floattisf(0x0007FB72E8000001, 0x1.FEDCBAp+50);
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test__floattisf(0x0007FB72E6000000, 0x1.FEDCBAp+50);
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test__floattisf(0x0007FB72E7000000, 0x1.FEDCBAp+50);
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test__floattisf(0x0007FB72E7FFFFFF, 0x1.FEDCBAp+50);
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test__floattisf(0x0007FB72E4000001, 0x1.FEDCBAp+50);
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test__floattisf(0x0007FB72E4000000, 0x1.FEDCB8p+50);
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test__floattisf(make_ti(0x0007FB72E8000000, 0), 0x1.FEDCBAp+114);
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test__floattisf(make_ti(0x0007FB72EA000000, 0), 0x1.FEDCBAp+114);
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test__floattisf(make_ti(0x0007FB72EB000000, 0), 0x1.FEDCBAp+114);
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test__floattisf(make_ti(0x0007FB72EBFFFFFF, 0), 0x1.FEDCBAp+114);
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test__floattisf(make_ti(0x0007FB72EC000000, 0), 0x1.FEDCBCp+114);
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test__floattisf(make_ti(0x0007FB72E8000001, 0), 0x1.FEDCBAp+114);
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test__floattisf(make_ti(0x0007FB72E6000000, 0), 0x1.FEDCBAp+114);
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test__floattisf(make_ti(0x0007FB72E7000000, 0), 0x1.FEDCBAp+114);
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test__floattisf(make_ti(0x0007FB72E7FFFFFF, 0), 0x1.FEDCBAp+114);
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test__floattisf(make_ti(0x0007FB72E4000001, 0), 0x1.FEDCBAp+114);
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test__floattisf(make_ti(0x0007FB72E4000000, 0), 0x1.FEDCB8p+114);
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}
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fn make_ti(high: u64, low: u64) i128 {
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var result: u128 = high;
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result <<= 64;
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result |= low;
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return @bitCast(i128, result);
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}
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