mirror of
https://github.com/openRuyi-Project/gcc.git
synced 2026-06-17 00:46:05 +00:00
Roger Sayle
a1293f402a
2016-05-31 Roger Sayle <roger@nextmovesoftware.com> gcc/java: * builtins.c (java_builtins): Use popcount* and bswap* builtins to implement bitCount() and reverseBytes() methods in java.lang.Integer and friends. (initialize_builtins): Annotate math builtins with ECF_LEAF. Call define_builtin for the new popcount* and bswap* builtins. libjava: * testsuite/libjava.lang/BuiltinBitCount.java: New test case. * testsuite/libjava.lang/BuiltinReverseBytes.java: Likewise. From-SVN: r236919
63 lines
1.5 KiB
Java
63 lines
1.5 KiB
Java
class BuiltinReverseBytes
|
|
{
|
|
public static short bswap16(short x)
|
|
{
|
|
return Short.reverseBytes(x);
|
|
}
|
|
|
|
public static int bswap32(int x)
|
|
{
|
|
return Integer.reverseBytes(x);
|
|
}
|
|
|
|
public static long bswap64(long x)
|
|
{
|
|
return Long.reverseBytes(x);
|
|
}
|
|
|
|
public static void main(String[] args)
|
|
{
|
|
if (Short.reverseBytes((short)0) != (short)0)
|
|
throw new Error();
|
|
if (Short.reverseBytes((short)0x1234) != (short)0x3412)
|
|
throw new Error();
|
|
if (Short.reverseBytes((short)-1) != (short)-1)
|
|
throw new Error();
|
|
|
|
if (Integer.reverseBytes(0) != 0)
|
|
throw new Error();
|
|
if (Integer.reverseBytes(0x12345678) != 0x78563412)
|
|
throw new Error();
|
|
if (Integer.reverseBytes(-1) != -1)
|
|
throw new Error();
|
|
|
|
if (Long.reverseBytes(0L) != 0L)
|
|
throw new Error();
|
|
if (Long.reverseBytes(0x123456789abcde0fL) != 0x0fdebc9a78563412L)
|
|
throw new Error();
|
|
if (Long.reverseBytes(-1L) != -1L)
|
|
throw new Error();
|
|
|
|
if (bswap16((short)0) != (short)0)
|
|
throw new Error();
|
|
if (bswap16((short)0x1234) != (short)0x3412)
|
|
throw new Error();
|
|
if (bswap16((short)-1) != (short)-1)
|
|
throw new Error();
|
|
|
|
if (bswap32(0) != 0)
|
|
throw new Error();
|
|
if (bswap32(0x12345678) != 0x78563412)
|
|
throw new Error();
|
|
if (bswap32(-1) != -1)
|
|
throw new Error();
|
|
|
|
if (bswap64(0L) != 0L)
|
|
throw new Error();
|
|
if (bswap64(0x123456789abcde0fL) != 0x0fdebc9a78563412L)
|
|
throw new Error();
|
|
if (bswap64(-1L) != -1L)
|
|
throw new Error();
|
|
}
|
|
}
|