On 05.07.2012 17:55, Andreas Färber wrote:
Am 05.07.2012 15:23, schrieb Yeongkyoon Lee:
Add an option "--enable-ldst-optimization" to enable
CONFIG_QEMU_LDST_OPTIMIZATION macro for TCG qemu_ld/st optimization. It only works with
CONFIG_SOFTMMU and doesn't work with CONFIG_TCG_PASS_AREG0.
Signed-off-by: Yeongkyoon Lee <yeongkyoon....@samsung.com>
---
configure | 15 +++++++++++++++
1 files changed, 15 insertions(+), 0 deletions(-)
diff --git a/configure b/configure
index 9f071b7..2b364cc 100755
--- a/configure
+++ b/configure
[...]
@@ -3463,6 +3466,11 @@ echo "EXESUF=$EXESUF" >> $config_host_mak
echo "LIBS_QGA+=$libs_qga" >> $config_host_mak
echo "POD2MAN=$POD2MAN" >> $config_host_mak
+if [ "$ldst_optimization" = "yes" -a "$cpu" != "i386" -a "$cpu" != "x86_64" ] ; then
+ echo "ERROR: qemu_ld/st optimization is only available on i386 or x86_64
hosts"
+ exit 1
+fi
[snip]
I assume that Samsung is interested in optimizing the Exynos emulation.
Nope ) Originally it's from x86 Tizen emulator )
I think there was already a patchset posted converting target-arm to
CONFIG_PASS_TCG_AREG0, only with some slowdowns to be investigated...
What is the obstacle for supporting AREG0 mode in your optimization?
Regards,
Andreas
+
# generate list of library paths for linker script
$ld --verbose -v 2> /dev/null | grep SEARCH_DIR > ${config_host_ld}
@@ -3696,11 +3704,18 @@ fi
symlink "$source_path/Makefile.target" "$target_dir/Makefile"
+target_ldst_optimization="$ldst_optimization"
+
case "$target_arch2" in
alpha | sparc* | xtensa* | ppc*)
echo "CONFIG_TCG_PASS_AREG0=y" >> $config_target_mak
+ # qemu_ld/st optimization is not available with CONFIG_TCG_PASS_AREG0
+ target_ldst_optimization="no"
;;
esac
+if [ "$target_ldst_optimization" = "yes" -a "$target_softmmu" = "yes" ] ; then
+ echo "CONFIG_QEMU_LDST_OPTIMIZATION=y" >> $config_target_mak
+fi
echo "TARGET_SHORT_ALIGNMENT=$target_short_alignment" >> $config_target_mak
echo "TARGET_INT_ALIGNMENT=$target_int_alignment" >> $config_target_mak
--
Kind regards,
Evgeny Voevodin,
Technical Leader,
Mobile Group, SMRC, Samsung Electronics
e-mail: e.voevo...@samsung.com
