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8253721: Flag -XX:AVX3Threshold does not accept Zero value

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Reviewed-by: kvn, thartmann
This commit is contained in:
Jatin Bhateja 2020-09-30 05:09:12 +00:00
parent 4d9f207347
commit ac02afe9dc
7 changed files with 13 additions and 10 deletions
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1
src/hotspot/cpu/x86/globals_x86.hpp
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@ -213,6 +213,7 @@ define_pd_global(intx, InitArrayShortSize, 8*BytesPerLong);
"for copy, inflate and fill. When this value is set as zero" \
"compare operations can also use AVX512 intrinsics.") \
range(0, max_jint) \
constraint(AVX3ThresholdConstraintFunc,AfterErgo) \
\
product(bool, IntelJccErratumMitigation, true, DIAGNOSTIC, \
"Turn off JVM mitigations related to Intel micro code " \

7
src/hotspot/cpu/x86/vm_version_x86.cpp
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@ -1162,13 +1162,6 @@ void VM_Version::get_processor_features() {
}
#endif // COMPILER2 && ASSERT
if (!FLAG_IS_DEFAULT(AVX3Threshold)) {
if (!is_power_of_2(AVX3Threshold)) {
warning("AVX3Threshold must be a power of 2");
FLAG_SET_DEFAULT(AVX3Threshold, 4096);
}
}
#ifdef _LP64
if (FLAG_IS_DEFAULT(UseMultiplyToLenIntrinsic)) {
UseMultiplyToLenIntrinsic = true;

11
src/hotspot/share/runtime/flags/jvmFlagConstraintsCompiler.cpp
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@ -285,6 +285,17 @@ JVMFlag::Error ArraycopyDstPrefetchDistanceConstraintFunc(uintx value, bool verb
return JVMFlag::SUCCESS;
}
JVMFlag::Error AVX3ThresholdConstraintFunc(int value, bool verbose) {
if (value != 0 && !is_power_of_2(value)) {
JVMFlag::printError(verbose,
"AVX3Threshold ( %d ) must be 0 or "
"a power of two value between 0 and MAX_INT\n", value);
return JVMFlag::VIOLATES_CONSTRAINT;
}
return JVMFlag::SUCCESS;
}
JVMFlag::Error ArraycopySrcPrefetchDistanceConstraintFunc(uintx value, bool verbose) {
if (value >= 4032) {
JVMFlag::printError(verbose,

1
src/hotspot/share/runtime/flags/jvmFlagConstraintsCompiler.hpp
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@ -47,6 +47,7 @@
f(intx, OptoLoopAlignmentConstraintFunc) \
f(uintx, ArraycopyDstPrefetchDistanceConstraintFunc) \
f(uintx, ArraycopySrcPrefetchDistanceConstraintFunc) \
f(int, AVX3ThresholdConstraintFunc) \
f(uintx, TypeProfileLevelConstraintFunc) \
f(intx, InitArrayShortSizeConstraintFunc) \
f(int , RTMTotalCountIncrRateConstraintFunc) \

1
src/jdk.internal.vm.compiler/share/classes/org.graalvm.compiler.lir.amd64/src/org/graalvm/compiler/lir/amd64/AMD64ArrayCompareToOp.java
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@ -84,7 +84,6 @@ public final class AMD64ArrayCompareToOp extends AMD64LIRInstruction {
public AMD64ArrayCompareToOp(LIRGeneratorTool tool, int useAVX3Threshold, JavaKind kind1, JavaKind kind2, Value result, Value array1, Value array2, Value length1, Value length2) {
super(TYPE);
assert CodeUtil.isPowerOf2(useAVX3Threshold) : "AVX3Threshold must be power of 2";
this.useAVX3Threshold = useAVX3Threshold;
this.kind1 = kind1;
this.kind2 = kind2;

1
src/jdk.internal.vm.compiler/share/classes/org.graalvm.compiler.lir.amd64/src/org/graalvm/compiler/lir/amd64/AMD64StringLatin1InflateOp.java
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@ -71,7 +71,6 @@ public final class AMD64StringLatin1InflateOp extends AMD64LIRInstruction {
public AMD64StringLatin1InflateOp(LIRGeneratorTool tool, int useAVX3Threshold, Value src, Value dst, Value len) {
super(TYPE);
assert CodeUtil.isPowerOf2(useAVX3Threshold) : "AVX3Threshold must be power of 2";
this.useAVX3Threshold = useAVX3Threshold;
assert asRegister(src).equals(rsi);

1
src/jdk.internal.vm.compiler/share/classes/org.graalvm.compiler.lir.amd64/src/org/graalvm/compiler/lir/amd64/AMD64StringUTF16CompressOp.java
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@ -76,7 +76,6 @@ public final class AMD64StringUTF16CompressOp extends AMD64LIRInstruction {
public AMD64StringUTF16CompressOp(LIRGeneratorTool tool, int useAVX3Threshold, Value res, Value src, Value dst, Value len) {
super(TYPE);
assert CodeUtil.isPowerOf2(useAVX3Threshold) : "AVX3Threshold must be power of 2";
this.useAVX3Threshold = useAVX3Threshold;
assert asRegister(src).equals(rsi);