When the following lines are specified in the BoardConfig.mk
TARGET_2ND_ARCH_VARIANT := armv8-a
TARGET_2ND_CPU_VARIANT := generic
The resulted binaries won't be built using 32-bit armv8-a integer
division instructions. Instead, division routines are used because
the build system will set a compiler option "-march=armv7-a", and
hence overwiting the previous "-march=armv8-a", when
TARGET_2ND_CPU_VARIANT is set to generic (or unset).
Bug: 67446726
Test: lunch aosp_arm64; make -j; emulator # boot to home screen
Also verify -march=armv7-a is not specified in the compiler
command line and the resulted binary actually uses integer
division instructions.
Change-Id: I430687aa5a658d2ec9f325a66d849b4c8898c7d5
-fomit-frame-pointer was specified twice, once for arm and once for
thumb. Move it to the shared cflags.
Bug: 68855788
Test: m checkbuild
Change-Id: Iab1299c247808f1a2542b468084600b7c32996e8
Move ldflags that are specified for all devices into
deviceGlobalLdflags, and add them to linker.go:
-Wl,-z,noexecstack
-Wl,-z,relro
-Wl,-z,now
-Wl,--build-id=md5
-Wl,--warn-shared-textrel
-Wl,--fatal-warnings
-Wl,--no-undefined-version
Bug: 68855788
Test: m checkbuild
Change-Id: I82561b4189287d7638006f9e298c5151f9930c5e
Move cflags that are set on all devices to deviceGlobalCflags:
-fno-canonical-system-headers
-ffunction-sections
-funwind-tables
-fstack-protector-strong
-Wa,--noexecstack
-D_FORTIFY_SOURCE=2
-Wstrict-aliasing=2
-Werror=format-security
Bug: 68855788
Test: m checkbuild
Change-Id: Iefec689fdd2749013d0cc003b3abec674a85fb74
Move all the flags that are used everywhere (or should be used
everywhere) into cc/config/global.go:
-no-canonical-prefixes
-fno-exceptions
-Wno-multichar
-O2
-g
-fno-strict-aliasing
Also remove flags that are already in noOverrideGlobalCflags:
-Werror=pointer-to-int-cast
-Werror=int-to-pointer-cast
x86 and x86_64 were specifying -fstrict-aliasing, but that was
being overriden later by -fno-strict-aliasing, so remove it.
ARM devices still override -fno-strict-aliasing to -fstrict-aliasing
when using ARM (vs. Thumb) instruction set.
Bug: 68855788
Test: m checkbuild
Change-Id: Ia2b5891bdefb60f974ad92b4b84a8548c2dcc7dc
This reverts commit 80b27e4e20.
Fixed CTS build issue by adding -march=armv7-a in cts/tests/tests/os/jni/Android.mk since the library built here needs/uses instruction (swp) obsolete in ARMv8.
Bug: 64964151
Test: lunch aosp_arm64-userdebug; make -j cts
lunch aosp_x86-userdebug; make -j cts
lunch aosp_sailfish-userdebug; make -j cts
lunch aosp_bullhead-userdebug; make -j cts
Change-Id: I6ccafce043e101c769ad370a81ffa0eb62719b5e
Add armv8-a as a valid/supported 32-bit arm architecture variant. If
some known armv8-a core, like cortex-a53, cortex-a73, etc. is specified
as TARGET(_2ND)_CPU_VARIANT, the associated TARGET(_2ND)_ARCH_VARIANT
will be treated as if armv8-a is specified.
Bug: 62895439
Test: "bionic-unit-tests-static --gtest_filter=*strlen*" on Nexus 4
(armv7-krait), emulator (armv7), and sailfish (armv8-kryo).
The test binary for the first 2 is built with armv7-a as its
TARGET_ARCH_VARIANT; The test binary for the last is built with
armv8-a as its TARGET_2ND_ARCH_VARIANT.
TARGET(_2ND)_CPU_VARIANTs of both binaries are set to "generic".
Change-Id: I53bee2974346cf485b2da54cf7aad010b0425910
Gold recognizes a different set of emulation strings to specify targets
than the bfd linker accepts. Clang only passes bfd emulations to the
linker, so we need to override these with the versions accepted by gold
when using gold.
Gold normally picks up the correct target from the first ELF input file
if it cannot parse the emulation parameter. However when using LTO, all
objects may be bitcode files, which causes gold to rely on the passed
--oformat or -m parameter to determine the proper target. If gold cannot
parse the emulation string passed by clang, it fails to link.
Test: build LTO version of libc
Change-Id: I38e78bb912fd3cc5fb7b4a762284f50ddd4f3998
* Cortex-A15 supports VFPv4 instructions
Test: make otapackage
Test: Built angler with 32 bit variant set to cortex-a15.
Test: Boot this version of the angler, ran bionic unit tests.
Change-Id: I94f00c9486ece201aa2c230308b9f90b0209dc4a
Also, update flags for cortex-a53.
Bug: 37647380
Test: Built target with cortex-a73 for both 32 bit/64 bit.
Test: Built target with cortex-a53.cortex-a57 for both 32 bit/64 bit.
Test: Ran bionic unit tests, ran art target tests.
(cherry picked from commit 1d9aa26d44)
Change-Id: I3325f60add7f424f8cca53c22919fc481ef5e787
Current modules must use armv7_a_neon to specify source files that
compile only with neon. If a future arch variant also supports neon,
all these modules will fall back to non-neon. Support a neon arch
feature that modules can use instead. Similarly, support dspr2 for
mips.
arm_device.go was also mixing armv7-a-neon with armv7_a_neon. Use
armv7-a-neon consistently, and fix the - to _ when creating the
property structs.
Test: m -j checkbuild
Change-Id: I24d3764280ab3bcbb9a73c0934edc9b99fc7f6a0
* GCC and Clang both support this, so we may as well simplify
the logic.
Test: make otapackage
Test: verified that the options are exactly the same, just slightly different order.
Change-Id: I8c2e9f3875cb662db708c799c9ce54f9fdd55981
Clang supports specific CPU targeting and optimization
for Kryo.
This switches us to using the specific Kryo targeting
when Clang is used. For other compilers, we fallback
to cortex-a57 targeting.
Also, move the replaceFirst function to a shared location.
Bug: 36728278
Test: Built and booted sailfish, ran bionic unit tests and art tests.
Test: Disassembled libc.so before this change and after and looked at
Test: the differences. Mostly the results were the order of instructions
Test: changing.
Test: Verified with the clang person (srhines) that our clang has this support
Test: and that it appears to be mostly instruction scheduling changes.
Change-Id: I4ee73d8bcc1e4f5eccb162c18937811fe199b16f
Signed-off-by: Alex Naidis <alex.naidis@linux.com>
* Kryo is closer to Krait than to cortex-a53, so choose Krait defaults.
* Made together with Jake Weinstein (xboxfanj)
Bug: 36728278
Test: Built and boot sailfish set up as kryo.
Change-Id: I04fa0a1dca6f97ae19202d28ee3ce8a59bf169b5
Signed-off-by: Alex Naidis <alex.naidis@linux.com>
and export the library name to make. Refactor the code a bit to avoid repeating the library name
multiple times.
Bug: 22033465
Test: Ran external/clang/build.py for aosp-llvm
Change-Id: I25eb3858eb92e1dd493b09524d559802551b2547
Isaac Chen