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package com.oracle.truffle.llvm.tests.types.floating;

import static org.junit.Assert.assertEquals;

import org.junit.Test;

import com.oracle.truffle.llvm.runtime.floating.LLVM80BitFloat;

public class LLVM80BitConstantsTest extends LLVM80BitTest {

    @Test
    public void testPositiveInt() {
        byte[] test = {0x40, 0x09, (byte) 0x9A, 0x40, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00};
        assertEquals(val(1234), LLVM80BitFloat.fromBytesBigEndian(test));
    }

    @Test
    public void testNegativeInt() {
        byte[] test = {(byte) 0xC0, 0x09, (byte) 0x9A, 0x40, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00};
        assertEquals(val(-1234), LLVM80BitFloat.fromBytesBigEndian(test));
    }

    @Test
    public void testZero() {
        byte[] test = new byte[10];
        assertEquals(zero(), LLVM80BitFloat.fromBytesBigEndian(test));
    }

    @Test
    public void testMinusZero() {
        byte[] test = {(byte) 0xBF, (byte) 0xFF, (byte) 0x80, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00};
        assertEquals(minusOne(), LLVM80BitFloat.fromBytesBigEndian(test));
    }

    @Test
    public void testPi() {
        byte[] test = {0x40, 0x00, (byte) 0xC9, 0x0F, (byte) 0xDA, (byte) 0xA2, 0x21, 0x68, (byte) 0xC2, 0x35};
        assertEquals(LLVM80BitFloat.fromRawValues(false, 0x4000, 0xc90fdaa22168c235L), LLVM80BitFloat.fromBytesBigEndian(test));
    }

    @Test
    public void testMinusOne() {
        byte[] test = {(byte) 0xBF, (byte) 0xFF, (byte) 0x80, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00};
        assertEquals(LLVM80BitFloat.fromRawValues(true, 0x3fff, 0x8000000000000000L), LLVM80BitFloat.fromBytesBigEndian(test));
    }
}