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fix 32-bit right unsigned shifts on amd64

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This commit is contained in:
Joel Dice 2008-04-30 11:15:21 -06:00
parent 844841937f
commit 918193fa60
2 changed files with 75 additions and 56 deletions
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2
src/x86.cpp
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@ -1791,7 +1791,7 @@ unsignedShiftRightRR(Context* c, unsigned size, Assembler::Register* a,
moveRR(c, 4, &bh, b); // 2 bytes
xorRR(c, 4, &bh, &bh); // 2 bytes
} else {
rex(c);
if (size == 8) rex(c);
c->code.append(0xd3);
c->code.append(0xe8 | b->low);
}

129
test/Misc.java
View File

@ -75,75 +75,94 @@ public class Misc {
}
public static void main(String[] args) {
// byte2 = 0;
// expect(byte2 == 0);
{ int a = -5;
int b = 2;
expect(a >> b == -5 >> 2);
expect(a >>> b == -5 >>> 2);
expect(a << b == -5 << 2);
expect(a * b == -5 * 2);
expect(a / b == -5 / 2);
expect(a % b == -5 % 2);
// expect(Long.valueOf(231L) == 231L);
a = 5;
b = 2;
expect(a >> b == 5 >> 2);
expect(a >>> b == 5 >>> 2);
expect(a << b == 5 << 2);
expect(a * b == 5 * 2);
expect(a / b == 5 / 2);
expect(a % b == 5 % 2);
}
// long x = 231;
// expect((x >> 32) == 0);
// expect((x >>> 32) == 0);
// expect((x << 32) == 992137445376L);
byte2 = 0;
expect(byte2 == 0);
// int shift = 32;
// expect((x >> shift) == 0);
// expect((x >>> shift) == 0);
// expect((x << shift) == 992137445376L);
expect(Long.valueOf(231L) == 231L);
// long y = -231;
// expect((y >> 32) == 0xffffffffffffffffL);
// expect((y >>> 32) == 0xffffffffL);
long x = 231;
expect((x >> 32) == 0);
expect((x >>> 32) == 0);
expect((x << 32) == 992137445376L);
// byte[] array = new byte[8];
// putLong(231, array, 0);
// expect((array[0] & 0xff) == 0);
// expect((array[1] & 0xff) == 0);
// expect((array[2] & 0xff) == 0);
// expect((array[3] & 0xff) == 0);
// expect((array[4] & 0xff) == 0);
// expect((array[5] & 0xff) == 0);
// expect((array[6] & 0xff) == 0);
// expect((array[7] & 0xff) == 231);
int shift = 32;
expect((x >> shift) == 0);
expect((x >>> shift) == 0);
expect((x << shift) == 992137445376L);
// java.nio.ByteBuffer buffer = java.nio.ByteBuffer.allocate(8);
// buffer.putLong(231);
// buffer.flip();
// expect(buffer.getLong() == 231);
long y = -231;
expect((y >> 32) == 0xffffffffffffffffL);
expect((y >>> 32) == 0xffffffffL);
// boolean v = Boolean.valueOf("true");
byte[] array = new byte[8];
putLong(231, array, 0);
expect((array[0] & 0xff) == 0);
expect((array[1] & 0xff) == 0);
expect((array[2] & 0xff) == 0);
expect((array[3] & 0xff) == 0);
expect((array[4] & 0xff) == 0);
expect((array[5] & 0xff) == 0);
expect((array[6] & 0xff) == 0);
expect((array[7] & 0xff) == 231);
// ClassLoader.getSystemClassLoader().toString();
java.nio.ByteBuffer buffer = java.nio.ByteBuffer.allocate(8);
buffer.putLong(231);
buffer.flip();
expect(buffer.getLong() == 231);
// int a = 2;
// int b = 2;
// int c = a + b;
boolean v = Boolean.valueOf("true");
// Misc m = new Misc();
// m.toString();
ClassLoader.getSystemClassLoader().toString();
// String s = "hello";
// m.foo(s);
// m.bar(s);
// baz(s);
int a = 2;
int b = 2;
int c = a + b;
// m.sync();
// syncStatic(false);
// try {
// syncStatic(true);
// } catch (RuntimeException e) {
// e.printStackTrace();
// }
Misc m = new Misc();
m.toString();
// int d = alpha;
// beta = 42;
// alpha = 43;
// int e = beta;
// int f = alpha;
// m.gamma = 44;
String s = "hello";
m.foo(s);
m.bar(s);
baz(s);
// expect(beta == 42);
// expect(alpha == 43);
// expect(m.gamma == 44);
m.sync();
syncStatic(false);
try {
syncStatic(true);
} catch (RuntimeException e) {
e.printStackTrace();
}
int d = alpha;
beta = 42;
alpha = 43;
int e = beta;
int f = alpha;
m.gamma = 44;
expect(beta == 42);
expect(alpha == 43);
expect(m.gamma == 44);
zip();
}