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Type: Enhancement
Resolution: Fixed
Priority: P4
Fix Version/s: 19
Affects Version/s: 19
Component/s: hotspot
Labels:
- intrinsic
- performance

Subcomponent:
compiler
Resolved In Build:
b18
CPU:

x86

Optimize the implementation of divideUnsigned() and remainderUnsigned() methods in java.lang.Integer and java.lang.Long classes by using x86 div instruction. The current implementation (without intrinsics) uses idiv instruction. (It is also possible to further optimize the special case of negative divisors using x86 code.)

is cloned by

JDK-8285040 PPC64 intrinsics for divideUnsigned and remainderUnsigned methods in java.lang.Integer and java.lang.Long

Resolved

JDK-8287926 AArch64: intrinsics for divideUnsigned and remainderUnsigned methods in java.lang.Integer and java.lang.Long

Resolved

relates to

JDK-8284635 Crashes after 8282221: assert(ctrl == kit.control()) failed: Control flow was added although the intrinsic bailed out

Resolved

JDK-8284663 [C2] assert(ctrl == kit.control()) failed: Control flow was added although the intrinsic bailed out

Closed

JDK-8282365 Consolidate and improve division by constant idealizations

Open

JDK-8332268 C2: Add missing optimizations for UDivI/L and UModI/L and unify the shared logic with the signed nodes

Resolved

JDK-8316422 TestIntegerUnsignedDivMod.java triggers "invalid layout" assert in FrameValues::validate

Resolved

JDK-8341068 [s390x] intrinsics for divideUnsigned and remainderUnsigned methods in java.lang.Integer and java.lang.Long

Resolved

JDK-8319970 AArch64: enable tests compiler/intrinsics/Test(Long|Integer)UnsignedDivMod.java on aarch64

Resolved

links to

Commit openjdk/jdk/37e28aea

Review openjdk/jdk/7572

(4 relates to, 2 links to)

Assignee:: Srinivas Parasa

Reporter:: Srinivas Parasa

Votes:: 0 Vote for this issue

Watchers:: 5 Start watching this issue

Created:: 2022-02-21 21:22

Updated:: 2024-10-10 01:22

Resolved:: 2022-04-09 20:50

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