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8187684: Intrinsify Math.multiplyHigh(long, long)

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Reviewed-by: kvn, aph, lucy
This commit is contained in:
Dmitrij Pochepko 2017-10-04 11:52:07 -07:00
parent f651176392
commit 949f677957
4 changed files with 13 additions and 0 deletions
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2
src/hotspot/share/classfile/vmSymbols.hpp
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@ -781,6 +781,7 @@
do_name(decrementExact_name,"decrementExact") \
do_name(incrementExact_name,"incrementExact") \
do_name(multiplyExact_name,"multiplyExact") \
do_name(multiplyHigh_name,"multiplyHigh") \
do_name(negateExact_name,"negateExact") \
do_name(subtractExact_name,"subtractExact") \
do_name(fma_name, "fma") \
@ -805,6 +806,7 @@
do_intrinsic(_incrementExactL, java_lang_Math, incrementExact_name, long_long_signature, F_S) \
do_intrinsic(_multiplyExactI, java_lang_Math, multiplyExact_name, int2_int_signature, F_S) \
do_intrinsic(_multiplyExactL, java_lang_Math, multiplyExact_name, long2_long_signature, F_S) \
do_intrinsic(_multiplyHigh, java_lang_Math, multiplyHigh_name, long2_long_signature, F_S) \
do_intrinsic(_negateExactI, java_lang_Math, negateExact_name, int_int_signature, F_S) \
do_intrinsic(_negateExactL, java_lang_Math, negateExact_name, long_long_signature, F_S) \
do_intrinsic(_subtractExactI, java_lang_Math, subtractExact_name, int2_int_signature, F_S) \

3
src/hotspot/share/opto/c2compiler.cpp
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@ -410,6 +410,9 @@ bool C2Compiler::is_intrinsic_supported(const methodHandle& method, bool is_virt
case vmIntrinsics::_multiplyExactL:
if (!Matcher::match_rule_supported(Op_OverflowMulL)) return false;
break;
case vmIntrinsics::_multiplyHigh:
if (!Matcher::match_rule_supported(Op_MulHiL)) return false;
break;
case vmIntrinsics::_getCallerClass:
if (SystemDictionary::reflect_CallerSensitive_klass() == NULL) return false;
break;

7
src/hotspot/share/opto/library_call.cpp
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@ -231,6 +231,7 @@ class LibraryCallKit : public GraphKit {
bool inline_math_addExactL(bool is_increment);
bool inline_math_multiplyExactI();
bool inline_math_multiplyExactL();
bool inline_math_multiplyHigh();
bool inline_math_negateExactI();
bool inline_math_negateExactL();
bool inline_math_subtractExactI(bool is_decrement);
@ -549,6 +550,7 @@ bool LibraryCallKit::try_to_inline(int predicate) {
case vmIntrinsics::_incrementExactL: return inline_math_addExactL(true /* increment */);
case vmIntrinsics::_multiplyExactI: return inline_math_multiplyExactI();
case vmIntrinsics::_multiplyExactL: return inline_math_multiplyExactL();
case vmIntrinsics::_multiplyHigh: return inline_math_multiplyHigh();
case vmIntrinsics::_negateExactI: return inline_math_negateExactI();
case vmIntrinsics::_negateExactL: return inline_math_negateExactL();
case vmIntrinsics::_subtractExactI: return inline_math_subtractExactI(false /* subtract */);
@ -1897,6 +1899,11 @@ bool LibraryCallKit::inline_math_multiplyExactL() {
return inline_math_overflow<OverflowMulLNode>(argument(0), argument(2));
}
bool LibraryCallKit::inline_math_multiplyHigh() {
set_result(_gvn.transform(new MulHiLNode(argument(0), argument(2))));
return true;
}
Node*
LibraryCallKit::generate_min_max(vmIntrinsics::ID id, Node* x0, Node* y0) {
// These are the candidate return value:

1
src/java.base/share/classes/java/lang/Math.java
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@ -1094,6 +1094,7 @@ public final class Math {
* @return the result
* @since 9
*/
@HotSpotIntrinsicCandidate
public static long multiplyHigh(long x, long y) {
if (x < 0 || y < 0) {
// Use technique from section 8-2 of Henry S. Warren, Jr.,