hg: jdk9/hs-comp/hotspot: 8161190: AArch64: Fix overflow in immediate cmp instruction

[aph at redhat.com]

Changeset: fbd5edf4d6e3
Author:    aph
Date:      2016-07-22 17:05 +0100
URL:       http://hg.openjdk.java.net/jdk9/hs-comp/hotspot/rev/fbd5edf4d6e3

8161190: AArch64: Fix overflow in immediate cmp instruction
Summary: Use subs instead of cmp to compare BlockZeroingLowLimit. Subs can check and handle immediate out of range correctly.
Reviewed-by: aph
Contributed-by: yang.zhang at linaro.org

! src/cpu/aarch64/vm/macroAssembler_aarch64.cpp
! src/cpu/aarch64/vm/stubGenerator_aarch64.cpp