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6940258: (bf) Use intrinsified reverseBytes operation; elide no-op constructs

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Reviewed-by: alanb, sherman
This commit is contained in:
Ulf Zibis 2010-06-30 16:11:32 -07:00 committed by Martin Buchholz
parent cd7e4c8c16
commit c8a460e29d
1 changed files with 57 additions and 63 deletions
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120
jdk/src/share/classes/java/nio/Bits.java
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@ -41,25 +41,19 @@ class Bits { // package-private
// -- Swapping --
static short swap(short x) {
return (short)((x << 8) |
((char)x >>> 8));
return Short.reverseBytes(x);
}
static char swap(char x) {
return (char)((x << 8) |
(x >>> 8));
return Character.reverseBytes(x);
}
static int swap(int x) {
return ((x << 24) |
((x & 0x0000ff00) << 8) |
((x & 0x00ff0000) >>> 8) |
(x >>> 24));
return Integer.reverseBytes(x);
}
static long swap(long x) {
return (((long)swap((int)x) << 32) |
((long)swap((int)(x >>> 32)) & 0xffffffffL));
return Long.reverseBytes(x);
}
@ -71,52 +65,52 @@ class Bits { // package-private
static char getCharL(ByteBuffer bb, int bi) {
return makeChar(bb._get(bi + 1),
bb._get(bi + 0));
bb._get(bi ));
}
static char getCharL(long a) {
return makeChar(_get(a + 1),
_get(a + 0));
_get(a ));
}
static char getCharB(ByteBuffer bb, int bi) {
return makeChar(bb._get(bi + 0),
return makeChar(bb._get(bi ),
bb._get(bi + 1));
}
static char getCharB(long a) {
return makeChar(_get(a + 0),
return makeChar(_get(a ),
_get(a + 1));
}
static char getChar(ByteBuffer bb, int bi, boolean bigEndian) {
return (bigEndian ? getCharB(bb, bi) : getCharL(bb, bi));
return bigEndian ? getCharB(bb, bi) : getCharL(bb, bi);
}
static char getChar(long a, boolean bigEndian) {
return (bigEndian ? getCharB(a) : getCharL(a));
return bigEndian ? getCharB(a) : getCharL(a);
}
private static byte char1(char x) { return (byte)(x >> 8); }
private static byte char0(char x) { return (byte)(x >> 0); }
private static byte char0(char x) { return (byte)(x ); }
static void putCharL(ByteBuffer bb, int bi, char x) {
bb._put(bi + 0, char0(x));
bb._put(bi , char0(x));
bb._put(bi + 1, char1(x));
}
static void putCharL(long a, char x) {
_put(a + 0, char0(x));
_put(a , char0(x));
_put(a + 1, char1(x));
}
static void putCharB(ByteBuffer bb, int bi, char x) {
bb._put(bi + 0, char1(x));
bb._put(bi , char1(x));
bb._put(bi + 1, char0(x));
}
static void putCharB(long a, char x) {
_put(a + 0, char1(x));
_put(a , char1(x));
_put(a + 1, char0(x));
}
@ -143,52 +137,52 @@ class Bits { // package-private
static short getShortL(ByteBuffer bb, int bi) {
return makeShort(bb._get(bi + 1),
bb._get(bi + 0));
bb._get(bi ));
}
static short getShortL(long a) {
return makeShort(_get(a + 1),
_get(a));
_get(a ));
}
static short getShortB(ByteBuffer bb, int bi) {
return makeShort(bb._get(bi + 0),
return makeShort(bb._get(bi ),
bb._get(bi + 1));
}
static short getShortB(long a) {
return makeShort(_get(a),
return makeShort(_get(a ),
_get(a + 1));
}
static short getShort(ByteBuffer bb, int bi, boolean bigEndian) {
return (bigEndian ? getShortB(bb, bi) : getShortL(bb, bi));
return bigEndian ? getShortB(bb, bi) : getShortL(bb, bi);
}
static short getShort(long a, boolean bigEndian) {
return (bigEndian ? getShortB(a) : getShortL(a));
return bigEndian ? getShortB(a) : getShortL(a);
}
private static byte short1(short x) { return (byte)(x >> 8); }
private static byte short0(short x) { return (byte)(x >> 0); }
private static byte short0(short x) { return (byte)(x ); }
static void putShortL(ByteBuffer bb, int bi, short x) {
bb._put(bi + 0, short0(x));
bb._put(bi , short0(x));
bb._put(bi + 1, short1(x));
}
static void putShortL(long a, short x) {
_put(a, short0(x));
_put(a , short0(x));
_put(a + 1, short1(x));
}
static void putShortB(ByteBuffer bb, int bi, short x) {
bb._put(bi + 0, short1(x));
bb._put(bi , short1(x));
bb._put(bi + 1, short0(x));
}
static void putShortB(long a, short x) {
_put(a, short1(x));
_put(a , short1(x));
_put(a + 1, short0(x));
}
@ -210,76 +204,76 @@ class Bits { // package-private
// -- get/put int --
static private int makeInt(byte b3, byte b2, byte b1, byte b0) {
return (((b3 & 0xff) << 24) |
return (((b3 ) << 24) |
((b2 & 0xff) << 16) |
((b1 & 0xff) << 8) |
((b0 & 0xff) << 0));
((b0 & 0xff) ));
}
static int getIntL(ByteBuffer bb, int bi) {
return makeInt(bb._get(bi + 3),
bb._get(bi + 2),
bb._get(bi + 1),
bb._get(bi + 0));
bb._get(bi ));
}
static int getIntL(long a) {
return makeInt(_get(a + 3),
_get(a + 2),
_get(a + 1),
_get(a + 0));
_get(a ));
}
static int getIntB(ByteBuffer bb, int bi) {
return makeInt(bb._get(bi + 0),
return makeInt(bb._get(bi ),
bb._get(bi + 1),
bb._get(bi + 2),
bb._get(bi + 3));
}
static int getIntB(long a) {
return makeInt(_get(a + 0),
return makeInt(_get(a ),
_get(a + 1),
_get(a + 2),
_get(a + 3));
}
static int getInt(ByteBuffer bb, int bi, boolean bigEndian) {
return (bigEndian ? getIntB(bb, bi) : getIntL(bb, bi));
return bigEndian ? getIntB(bb, bi) : getIntL(bb, bi) ;
}
static int getInt(long a, boolean bigEndian) {
return (bigEndian ? getIntB(a) : getIntL(a));
return bigEndian ? getIntB(a) : getIntL(a) ;
}
private static byte int3(int x) { return (byte)(x >> 24); }
private static byte int2(int x) { return (byte)(x >> 16); }
private static byte int1(int x) { return (byte)(x >> 8); }
private static byte int0(int x) { return (byte)(x >> 0); }
private static byte int0(int x) { return (byte)(x ); }
static void putIntL(ByteBuffer bb, int bi, int x) {
bb._put(bi + 3, int3(x));
bb._put(bi + 2, int2(x));
bb._put(bi + 1, int1(x));
bb._put(bi + 0, int0(x));
bb._put(bi , int0(x));
}
static void putIntL(long a, int x) {
_put(a + 3, int3(x));
_put(a + 2, int2(x));
_put(a + 1, int1(x));
_put(a + 0, int0(x));
_put(a , int0(x));
}
static void putIntB(ByteBuffer bb, int bi, int x) {
bb._put(bi + 0, int3(x));
bb._put(bi , int3(x));
bb._put(bi + 1, int2(x));
bb._put(bi + 2, int1(x));
bb._put(bi + 3, int0(x));
}
static void putIntB(long a, int x) {
_put(a + 0, int3(x));
_put(a , int3(x));
_put(a + 1, int2(x));
_put(a + 2, int1(x));
_put(a + 3, int0(x));
@ -305,14 +299,14 @@ class Bits { // package-private
static private long makeLong(byte b7, byte b6, byte b5, byte b4,
byte b3, byte b2, byte b1, byte b0)
{
return ((((long)b7 & 0xff) << 56) |
return ((((long)b7 ) << 56) |
(((long)b6 & 0xff) << 48) |
(((long)b5 & 0xff) << 40) |
(((long)b4 & 0xff) << 32) |
(((long)b3 & 0xff) << 24) |
(((long)b2 & 0xff) << 16) |
(((long)b1 & 0xff) << 8) |
(((long)b0 & 0xff) << 0));
(((long)b0 & 0xff) ));
}
static long getLongL(ByteBuffer bb, int bi) {
@ -323,7 +317,7 @@ class Bits { // package-private
bb._get(bi + 3),
bb._get(bi + 2),
bb._get(bi + 1),
bb._get(bi + 0));
bb._get(bi ));
}
static long getLongL(long a) {
@ -334,11 +328,11 @@ class Bits { // package-private
_get(a + 3),
_get(a + 2),
_get(a + 1),
_get(a + 0));
_get(a ));
}
static long getLongB(ByteBuffer bb, int bi) {
return makeLong(bb._get(bi + 0),
return makeLong(bb._get(bi ),
bb._get(bi + 1),
bb._get(bi + 2),
bb._get(bi + 3),
@ -349,7 +343,7 @@ class Bits { // package-private
}
static long getLongB(long a) {
return makeLong(_get(a + 0),
return makeLong(_get(a ),
_get(a + 1),
_get(a + 2),
_get(a + 3),
@ -360,11 +354,11 @@ class Bits { // package-private
}
static long getLong(ByteBuffer bb, int bi, boolean bigEndian) {
return (bigEndian ? getLongB(bb, bi) : getLongL(bb, bi));
return bigEndian ? getLongB(bb, bi) : getLongL(bb, bi);
}
static long getLong(long a, boolean bigEndian) {
return (bigEndian ? getLongB(a) : getLongL(a));
return bigEndian ? getLongB(a) : getLongL(a);
}
private static byte long7(long x) { return (byte)(x >> 56); }
@ -374,7 +368,7 @@ class Bits { // package-private
private static byte long3(long x) { return (byte)(x >> 24); }
private static byte long2(long x) { return (byte)(x >> 16); }
private static byte long1(long x) { return (byte)(x >> 8); }
private static byte long0(long x) { return (byte)(x >> 0); }
private static byte long0(long x) { return (byte)(x ); }
static void putLongL(ByteBuffer bb, int bi, long x) {
bb._put(bi + 7, long7(x));
@ -384,7 +378,7 @@ class Bits { // package-private
bb._put(bi + 3, long3(x));
bb._put(bi + 2, long2(x));
bb._put(bi + 1, long1(x));
bb._put(bi + 0, long0(x));
bb._put(bi , long0(x));
}
static void putLongL(long a, long x) {
@ -395,11 +389,11 @@ class Bits { // package-private
_put(a + 3, long3(x));
_put(a + 2, long2(x));
_put(a + 1, long1(x));
_put(a + 0, long0(x));
_put(a , long0(x));
}
static void putLongB(ByteBuffer bb, int bi, long x) {
bb._put(bi + 0, long7(x));
bb._put(bi , long7(x));
bb._put(bi + 1, long6(x));
bb._put(bi + 2, long5(x));
bb._put(bi + 3, long4(x));
@ -410,7 +404,7 @@ class Bits { // package-private
}
static void putLongB(long a, long x) {
_put(a + 0, long7(x));
_put(a , long7(x));
_put(a + 1, long6(x));
_put(a + 2, long5(x));
_put(a + 3, long4(x));
@ -454,11 +448,11 @@ class Bits { // package-private
}
static float getFloat(ByteBuffer bb, int bi, boolean bigEndian) {
return (bigEndian ? getFloatB(bb, bi) : getFloatL(bb, bi));
return bigEndian ? getFloatB(bb, bi) : getFloatL(bb, bi);
}
static float getFloat(long a, boolean bigEndian) {
return (bigEndian ? getFloatB(a) : getFloatL(a));
return bigEndian ? getFloatB(a) : getFloatL(a);
}
static void putFloatL(ByteBuffer bb, int bi, float x) {
@ -511,11 +505,11 @@ class Bits { // package-private
}
static double getDouble(ByteBuffer bb, int bi, boolean bigEndian) {
return (bigEndian ? getDoubleB(bb, bi) : getDoubleL(bb, bi));
return bigEndian ? getDoubleB(bb, bi) : getDoubleL(bb, bi);
}
static double getDouble(long a, boolean bigEndian) {
return (bigEndian ? getDoubleB(a) : getDoubleL(a));
return bigEndian ? getDoubleB(a) : getDoubleL(a);
}
static void putDoubleL(ByteBuffer bb, int bi, double x) {
@ -794,7 +788,7 @@ class Bits { // package-private
static native void copyFromIntArray(Object src, long srcPos, long dstAddr,
long length);
static native void copyToIntArray(long srcAddr, Object dst, long dstPos,
long length);
long length);
static native void copyFromLongArray(Object src, long srcPos, long dstAddr,
long length);