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The commit d03b174a83 (target/ppc: simplify bcdadd/sub functions)
meant to simplify some of the code but it inadvertently altered the
way the CR6 field is set after the operation has overflowed.
The CR6 bits are set based on the *unbounded* result of the operation,
so we need to look at the result before returning from bcd_add_mag,
otherwise we will look at 0 when it overflows.
Consider the following subtraction:
v0 = 0x9999999999999999999999999999999c (maximum positive BCD value)
v1 = 0x0000000000000000000000000000001d (negative one BCD value)
bcdsub. v0,v0,v1,0
The Power ISA 2.07B says:
If the unbounded result is greater than zero, do the following.
If PS=0, the sign code of the result is set to 0b1100.
If PS=1, the sign code of the result is set to 0b1111.
If the operation overflows, CR field 6 is set to 0b0101. Otherwise,
CR field 6 is set to 0b0100.
POWER9 hardware:
vr0 = 0x0000000000000000000000000000000c (positive zero BCD value)
cr6 = 0b0101 (0x5) (positive, overflow)
QEMU:
vr0 = 0x0000000000000000000000000000000c (positive zero BCD value)
cr6 = 0b0011 (0x3) (zero, overflow) <--- wrong
This patch reverts the part of d03b174a83 that introduced the
problem and adds a test-case to avoid further regressions:
before:
$ make run-tcg-tests-ppc64le-linux-user
(...)
TEST bcdsub on ppc64le
bcdsub: qemu/tests/tcg/ppc64le/bcdsub.c:58: test_bcdsub_gt:
Assertion `(cr >> 4) == ((1 << 2) | (1 << 0))' failed.
Fixes: d03b174a83 (target/ppc: simplify bcdadd/sub functions)
Reported-by: Paul Clarke <pc@us.ibm.com>
Signed-off-by: Fabiano Rosas <farosas@linux.ibm.com>
Message-Id: <20210222194035.2723056-1-farosas@linux.ibm.com>
Signed-off-by: David Gibson <david@gibson.dropbear.id.au>
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Blink and you miss the cross TCG compiler stuff so lets display it
with the rest of the compiler information.
Signed-off-by: Alex Bennée <alex.bennee@linaro.org>
Tested-by: Philippe Mathieu-Daudé <f4bug@amsat.org>
Reviewed-by: Philippe Mathieu-Daudé <f4bug@amsat.org>
Reviewed-by: Richard Henderson <richard.henderson@linaro.org>
Acked-by: Paolo Bonzini <pbonzini@redhat.com>
Message-Id: <20210222101455.12640-2-alex.bennee@linaro.org>
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Enable multiarch tests for Hexagon
Modify tests/tcg/configure.sh
Add reference files to tests/tcg/hexagon
Signed-off-by: Taylor Simpson <tsimpson@quicinc.com>
Reviewed-by: Richard Henderson <richard.henderson@linaro.org>
Reviewed-by: Philippe Mathieu-Daudé <f4bug@amsat.org>
Message-Id: <1612763186-18161-32-git-send-email-tsimpson@quicinc.com>
Signed-off-by: Richard Henderson <richard.henderson@linaro.org>
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Reviewed-by: Peter Maydell <peter.maydell@linaro.org>
Signed-off-by: Richard Henderson <richard.henderson@linaro.org>
Message-id: 20210212184902.1251044-32-richard.henderson@linaro.org
Signed-off-by: Peter Maydell <peter.maydell@linaro.org>
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The note test requires gcc 10 for -mbranch-protection=standard.
The mmap test uses PROT_BTI and does not require special compiler support.
Acked-by: Alex Bennée <alex.bennee@linaro.org>
Reviewed-by: Peter Maydell <peter.maydell@linaro.org>
Signed-off-by: Richard Henderson <richard.henderson@linaro.org>
Message-id: 20201021173749.111103-13-richard.henderson@linaro.org
Signed-off-by: Peter Maydell <peter.maydell@linaro.org>
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Commit 660f79309303d696531ffb394719dfab3e0c42c0 was a bit overzealous
with respect to tests/tcg, which needed quiet-command and $(BUILD_DIR).
Reinstate quiet-command, and replace $(BUILD_DIR) with just the
current directory.
Reported-by: Alex Bennée <alex.bennee@linaro.org>
Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
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Not attempting to use a single cross-compiler for both
big-endian and little-endian at this time.
Tested-by: Edgar E. Iglesias <edgar.iglesias@xilinx.com>
Reviewed-by: Edgar E. Iglesias <edgar.iglesias@xilinx.com>
Signed-off-by: Richard Henderson <richard.henderson@linaro.org>
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The binaries move to the root directory, e.g. qemu-system-i386 or
qemu-arm. This requires changes to qtests, CI, etc.
Signed-off-by: Marc-André Lureau <marcandre.lureau@redhat.com>
Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
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Switch to the prebuilt xtensa toolchains release 2020.07.
Drop csp toolchain as the csp core is not a part of QEMU.
Add de233_fpu and dsp3400 toolchains to enable DFPU and FPU2000 tests.
Signed-off-by: Max Filippov <jcmvbkbc@gmail.com>
Signed-off-by: Alex Bennée <alex.bennee@linaro.org>
Reviewed-by: Philippe Mathieu-Daudé <f4bug@amsat.org>
Tested-by: Philippe Mathieu-Daudé <f4bug@amsat.org>
[AJB: fix path in configure.sh]
Signed-off-by: Alex Bennée <alex.bennee@linaro.org>
Message-Id: <20200708082347.27318-1-jcmvbkbc@gmail.com>
Message-Id: <20200709141327.14631-13-alex.bennee@linaro.org>
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We were missing a bunch of compilers which we could use if they were
locally installed. The defaults are based on Debian as they seem to be
the best distro for well distributed cross-build compilers.
Signed-off-by: Alex Bennée <alex.bennee@linaro.org>
Message-Id: <20200701135652.1366-32-alex.bennee@linaro.org>
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As we enable newer features that we want to test on arm64 targets we
need newer compilers. Split off a new debian-arm64-test-cross image
which we can use to build these new tests.
Signed-off-by: Alex Bennée <alex.bennee@linaro.org>
Reviewed-by: Richard Henderson <richard.henderson@linaro.org>
Message-Id: <20200520140541.30256-11-alex.bennee@linaro.org>
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Although most people use the docker images this can trip up on
developer systems with actual valid cross-compilers!
Fixes: bb516dfc5b3
Signed-off-by: Alex Bennée <alex.bennee@linaro.org>
Reviewed-by: Philippe Mathieu-Daudé <f4bug@amsat.org>
Reviewed-by: Richard Henderson <richard.henderson@linaro.org>
Message-Id: <20200225124710.14152-19-alex.bennee@linaro.org>
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Otherwise we end up failing to build our tests on CI which may have
older compilers that the user expects. We can get rid of this once we
can fallback to multiarch containers.
Signed-off-by: Alex Bennée <alex.bennee@linaro.org>
Message-Id: <20200203090932.19147-14-alex.bennee@linaro.org>
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We will need this for some tests later. The docker images already
support it by default.
Signed-off-by: Alex Bennée <alex.bennee@linaro.org>
Reviewed-by: Richard Henderson <richard.henderson@linaro.org>
Message-Id: <20200203090932.19147-13-alex.bennee@linaro.org>
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Our docker infrastructure isn't quite as multiarch as we would wish so
lets allow the user to disable it if they want. This will allow us to
use still run check-tcg on non-x86 CI setups.
Signed-off-by: Alex Bennée <alex.bennee@linaro.org>
Reviewed-by: Stefan Weil <sw@weilnetz.de>
Reviewed-by: Cleber Rosa <crosa@redhat.com>
Tested-by: Cleber Rosa <crosa@redhat.com>
Reviewed-by: Philippe Mathieu-Daudé <philmd@redhat.com>
Reviewed-by: Richard Henderson <richard.henderson@linaro.org>
Tested-by: Richard Henderson <richard.henderson@linaro.org>
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Now Buster is released we can unify our cross build images for both
QEMU and tests.
Signed-off-by: Alex Bennée <alex.bennee@linaro.org>
Reviewed-by: Philippe Mathieu-Daudé <philmd@redhat.com>
Tested-by: Philippe Mathieu-Daudé <philmd@redhat.com>
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Avoid the repeated inclusions of config-target.mak, which have
risks of namespace pollution, and instead build minimal configuration
files in a configuration script. The same configuration files can
also be included in Makefile and Makefile.qemu
[AJB 10/09/19]
In the original PR this had inadvertently enabled tests
for ppc64abi32. However as the rest of the multiarch tests work rather
than disabling the otherwise correctly functioning build I've just
skipped the failing linux-test test. For some reason I can't debug it
with TCG so I'm leaving that to the PPC maintainers to look at.
Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
Message-Id: <20190807143523.15917-4-pbonzini@redhat.com>
[AJB: s/docker/container/, rm last bits from configure, ppc6432abi hack]
Signed-off-by: Alex Bennée <alex.bennee@linaro.org>
Cc: Richard Henderson <rth@twiddle.net>
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