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LUCENE-5207: Simplify the comparisons 

git-svn-id: https://svn.apache.org/repos/asf/lucene/dev/branches/lucene5207@1523375 13f79535-47bb-0310-9956-ffa450edef68
This commit is contained in:
Uwe Schindler 2013-09-15 00:48:44 +00:00
parent 0b07ec8d0c
commit f2787a0603
1 changed files with 26 additions and 90 deletions
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116
lucene/expressions/src/java/org/apache/lucene/expressions/js/JavascriptCompiler.java
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@ -21,18 +21,11 @@ import static org.objectweb.asm.Opcodes.ACC_PUBLIC;
import static org.objectweb.asm.Opcodes.ACC_SUPER;
import static org.objectweb.asm.Opcodes.ACC_SYNTHETIC;
import static org.objectweb.asm.Opcodes.DADD;
import static org.objectweb.asm.Opcodes.DCMPG;
import static org.objectweb.asm.Opcodes.DCMPL;
import static org.objectweb.asm.Opcodes.DDIV;
import static org.objectweb.asm.Opcodes.DNEG;
import static org.objectweb.asm.Opcodes.DREM;
import static org.objectweb.asm.Opcodes.DSUB;
import static org.objectweb.asm.Opcodes.GOTO;
import static org.objectweb.asm.Opcodes.IFEQ;
import static org.objectweb.asm.Opcodes.IFGE;
import static org.objectweb.asm.Opcodes.IFGT;
import static org.objectweb.asm.Opcodes.IFLE;
import static org.objectweb.asm.Opcodes.IFLT;
import static org.objectweb.asm.Opcodes.IFNE;
import static org.objectweb.asm.Opcodes.LAND;
import static org.objectweb.asm.Opcodes.LOR;
@ -274,7 +267,6 @@ public class JavascriptCompiler {
gen.arrayLoad(FUNCTION_VALUES_TYPE);
gen.loadArg(0);
gen.invokeVirtual(FUNCTION_VALUES_TYPE, DOUBLE_VAL_METHOD);
gen.cast(Type.DOUBLE_TYPE, expected);
break;
case JavascriptParser.HEX:
@ -360,98 +352,27 @@ public class JavascriptCompiler {
break;
case JavascriptParser.AT_BIT_NOT:
recursiveCompile(current.getChild(0), Type.LONG_TYPE);
gen.visitLdcInsn(new Long(-1));
gen.push(-1L);
gen.visitInsn(LXOR);
gen.cast(Type.LONG_TYPE, expected);
break;
case JavascriptParser.AT_COMP_EQ:
Label labelEqTrue = new Label();
Label labelEqReturn = new Label();
recursiveCompile(current.getChild(0), Type.DOUBLE_TYPE);
recursiveCompile(current.getChild(1), Type.DOUBLE_TYPE);
gen.visitInsn(DCMPL);
gen.visitJumpInsn(IFEQ, labelEqTrue);
pushBoolean(expected, false);
gen.visitJumpInsn(GOTO, labelEqReturn);
gen.visitLabel(labelEqTrue);
pushBoolean(expected, true);
gen.visitLabel(labelEqReturn);
compileCompare(GeneratorAdapter.EQ, current, expected);
break;
case JavascriptParser.AT_COMP_NEQ:
Label labelNeqTrue = new Label();
Label labelNeqReturn = new Label();
recursiveCompile(current.getChild(0), Type.DOUBLE_TYPE);
recursiveCompile(current.getChild(1), Type.DOUBLE_TYPE);
gen.visitInsn(DCMPL);
gen.visitJumpInsn(IFNE, labelNeqTrue);
pushBoolean(expected, false);
gen.visitJumpInsn(GOTO, labelNeqReturn);
gen.visitLabel(labelNeqTrue);
pushBoolean(expected, true);
gen.visitLabel(labelNeqReturn);
compileCompare(GeneratorAdapter.NE, current, expected);
break;
case JavascriptParser.AT_COMP_LT:
Label labelLtTrue = new Label();
Label labelLtReturn = new Label();
recursiveCompile(current.getChild(0), Type.DOUBLE_TYPE);
recursiveCompile(current.getChild(1), Type.DOUBLE_TYPE);
gen.visitInsn(DCMPG);
gen.visitJumpInsn(IFLT, labelLtTrue);
pushBoolean(expected, false);
gen.visitJumpInsn(GOTO, labelLtReturn);
gen.visitLabel(labelLtTrue);
pushBoolean(expected, true);
gen.visitLabel(labelLtReturn);
compileCompare(GeneratorAdapter.LT, current, expected);
break;
case JavascriptParser.AT_COMP_GT:
Label labelGtTrue = new Label();
Label labelGtReturn = new Label();
recursiveCompile(current.getChild(0), Type.DOUBLE_TYPE);
recursiveCompile(current.getChild(1), Type.DOUBLE_TYPE);
gen.visitInsn(DCMPL);
gen.visitJumpInsn(IFGT, labelGtTrue);
pushBoolean(expected, false);
gen.visitJumpInsn(GOTO, labelGtReturn);
gen.visitLabel(labelGtTrue);
pushBoolean(expected, true);
gen.visitLabel(labelGtReturn);
compileCompare(GeneratorAdapter.GT, current, expected);
break;
case JavascriptParser.AT_COMP_LTE:
Label labelLteTrue = new Label();
Label labelLteReturn = new Label();
recursiveCompile(current.getChild(0), Type.DOUBLE_TYPE);
recursiveCompile(current.getChild(1), Type.DOUBLE_TYPE);
gen.visitInsn(DCMPG);
gen.visitJumpInsn(IFLE, labelLteTrue);
pushBoolean(expected, false);
gen.visitJumpInsn(GOTO, labelLteReturn);
gen.visitLabel(labelLteTrue);
pushBoolean(expected, true);
gen.visitLabel(labelLteReturn);
compileCompare(GeneratorAdapter.LE, current, expected);
break;
case JavascriptParser.AT_COMP_GTE:
Label labelGteTrue = new Label();
Label labelGteReturn = new Label();
recursiveCompile(current.getChild(0), Type.DOUBLE_TYPE);
recursiveCompile(current.getChild(1), Type.DOUBLE_TYPE);
gen.visitInsn(DCMPL);
gen.visitJumpInsn(IFGE, labelGteTrue);
pushBoolean(expected, false);
gen.visitJumpInsn(GOTO, labelGteReturn);
gen.visitLabel(labelGteTrue);
pushBoolean(expected, true);
gen.visitLabel(labelGteReturn);
compileCompare(GeneratorAdapter.GE, current, expected);
break;
case JavascriptParser.AT_BOOL_NOT:
Label labelNotTrue = new Label();
@ -460,7 +381,7 @@ public class JavascriptCompiler {
recursiveCompile(current.getChild(0), Type.INT_TYPE);
gen.visitJumpInsn(IFEQ, labelNotTrue);
pushBoolean(expected, false);
gen.visitJumpInsn(GOTO, labelNotReturn);
gen.goTo(labelNotReturn);
gen.visitLabel(labelNotTrue);
pushBoolean(expected, true);
gen.visitLabel(labelNotReturn);
@ -474,7 +395,7 @@ public class JavascriptCompiler {
recursiveCompile(current.getChild(1), Type.INT_TYPE);
gen.visitJumpInsn(IFEQ, andFalse);
pushBoolean(expected, true);
gen.visitJumpInsn(GOTO, andEnd);
gen.goTo(andEnd);
gen.visitLabel(andFalse);
pushBoolean(expected, false);
gen.visitLabel(andEnd);
@ -488,7 +409,7 @@ public class JavascriptCompiler {
recursiveCompile(current.getChild(1), Type.INT_TYPE);
gen.visitJumpInsn(IFNE, orTrue);
pushBoolean(expected, false);
gen.visitJumpInsn(GOTO, orEnd);
gen.goTo(orEnd);
gen.visitLabel(orTrue);
pushBoolean(expected, true);
gen.visitLabel(orEnd);
@ -500,7 +421,7 @@ public class JavascriptCompiler {
recursiveCompile(current.getChild(0), Type.INT_TYPE);
gen.visitJumpInsn(IFEQ, condFalse);
recursiveCompile(current.getChild(1), expected);
gen.visitJumpInsn(GOTO, condEnd);
gen.goTo(condEnd);
gen.visitLabel(condFalse);
recursiveCompile(current.getChild(2), expected);
gen.visitLabel(condEnd);
@ -510,6 +431,21 @@ public class JavascriptCompiler {
}
}
private void compileCompare(int operator, Tree current, Type expected) {
Label labelTrue = new Label();
Label labelReturn = new Label();
recursiveCompile(current.getChild(0), Type.DOUBLE_TYPE);
recursiveCompile(current.getChild(1), Type.DOUBLE_TYPE);
gen.ifCmp(Type.DOUBLE_TYPE, operator, labelTrue);
pushBoolean(expected, false);
gen.goTo(labelReturn);
gen.visitLabel(labelTrue);
pushBoolean(expected, true);
gen.visitLabel(labelReturn);
}
private void pushBoolean(Type expected, boolean truth) {
switch (expected.getSort()) {
case Type.INT: