git: openjdk/jdk: 8265491: Math Signum optimization for x86

[Sandhya Viswanathan]

Changeset: ff65920c
Author:    Marcus G K Williams <marcus.williams at intel.com>
Committer: Sandhya Viswanathan <sviswanathan at openjdk.org>
Date:      2021-05-03 16:28:14 +0000
URL:       https://git.openjdk.java.net/jdk/commit/ff65920cd17e7e862b182524e2151784e26a079c

8265491: Math Signum optimization for x86

Reviewed-by: jiefu, jbhateja, neliasso

! src/hotspot/cpu/x86/c2_MacroAssembler_x86.cpp
! src/hotspot/cpu/x86/c2_MacroAssembler_x86.hpp
! src/hotspot/cpu/x86/vm_version_x86.cpp
! src/hotspot/cpu/x86/x86.ad
! src/hotspot/share/opto/library_call.cpp
! test/hotspot/jtreg/compiler/intrinsics/math/TestSignumIntrinsic.java
+ test/micro/org/openjdk/bench/vm/compiler/Signum.java