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- Hi,
- This patch adds a new ARM ABI option for ARM926EJ-S. The reason is not
- because of ABI breakage, but it is because of GCC -mcpu flags
- specifically for this CPU. We think that this might increase
- performance a little bit. However, we do not have numbers for this.
- Alternatively, we may just stick to the arm-sflt ABI option.
- This patch was successfully built with a few other independent patches
- here: https://ci.adoptopenjdk.net/view/ev3dev/ ;
- https://github.com/ev3dev-lang-java/openjdk-ev3
- We haven't run full jtreg tests on the target platform yet, but Juan
- Antonio Brena Moral invested his time into Adopt's openjdktests in
- QEMU. Also, the JVM seems to run fine on the ARM board itself.
- Regards,
- Jakub Vanek (with credit to Juan Antonio)
- # HG changeset patch
- # User Jakub Vaněk <linuxtardis@gmail.com>
- # Date 1542060149 -3600
- # Mon Nov 12 23:02:29 2018 +0100
- # Node ID 82c5c630ee8f9237b533ba6414143d109dec0180
- # Parent a609d549992a4d094a514a6c0f5b79443192d8bf
- Add optimization flags for ARM926EJ-S
- diff --git a/make/autoconf/flags-other.m4 b/make/autoconf/flags-other.m4
- --- a/make/autoconf/flags-other.m4
- +++ b/make/autoconf/flags-other.m4
- @@ -119,6 +119,10 @@
- # Misuse EXTRA_CFLAGS to mimic old behavior
- $2JVM_ASFLAGS="$JVM_BASIC_ASFLAGS ${$2EXTRA_CFLAGS}"
- + if test "x$OPENJDK_TARGET_ABI_PROFILE" = xarm926ejs; then
- + $2JVM_ASFLAGS="$JVM_BASIC_ASFLAGS -mcpu=arm926ej-s"
- + fi
- +
- AC_SUBST($2JVM_ASFLAGS)
- ])
- diff --git a/make/autoconf/flags.m4 b/make/autoconf/flags.m4
- --- a/make/autoconf/flags.m4
- +++ b/make/autoconf/flags.m4
- @@ -34,7 +34,7 @@
- AC_DEFUN([FLAGS_SETUP_ABI_PROFILE],
- [
- AC_ARG_WITH(abi-profile, [AS_HELP_STRING([--with-abi-profile],
- - [specify ABI profile for ARM builds
- (arm-vfp-sflt,arm-vfp-hflt,arm-sflt,
- armv5-vfp-sflt,armv6-vfp-hflt,aarch64) @<:@toolchain dependent@:>@
- ])])
- + [specify ABI profile for ARM builds
- (arm-vfp-sflt,arm-vfp-hflt,arm-sflt,
- arm926ejs,armv5-vfp-sflt,armv6-vfp-hflt,aarch64) @<:@toolchain
- dependent@:>@ ])])
- if test "x$with_abi_profile" != x; then
- if test "x$OPENJDK_TARGET_CPU" != xarm && \
- @@ -55,6 +55,9 @@
- elif test "x$OPENJDK_TARGET_ABI_PROFILE" = xarm-sflt; then
- ARM_FLOAT_TYPE=sflt
- ARM_ARCH_TYPE_FLAGS='-march=armv5t -marm'
- + elif test "x$OPENJDK_TARGET_ABI_PROFILE" = xarm926ejs; then
- + ARM_FLOAT_TYPE=sflt
- + ARM_ARCH_TYPE_FLAGS='-mcpu=arm926ej-s -marm'
- elif test "x$OPENJDK_TARGET_ABI_PROFILE" = xarmv5-vfp-sflt; then
- ARM_FLOAT_TYPE=vfp-sflt
- ARM_ARCH_TYPE_FLAGS='-march=armv5t -marm'
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