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qemu/tests
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Joseph Myers 418b0f93d1 target/i386: fix IEEE SSE floating-point exception raising 
The SSE instruction implementations all fail to raise the expected
IEEE floating-point exceptions because they do nothing to convert the
exception state from the softfloat machinery into the exception flags
in MXCSR.

Fix this by adding such conversions.  Unlike for x87, emulated SSE
floating-point operations might be optimized using hardware floating
point on the host, and so a different approach is taken that is
compatible with such optimizations.  The required invariant is that
all exceptions set in env->sse_status (other than "denormal operand",
for which the SSE semantics are different from those in the softfloat
code) are ones that are set in the MXCSR; the emulated MXCSR is
updated lazily when code reads MXCSR, while when code sets MXCSR, the
exceptions in env->sse_status are set accordingly.

A few instructions do not raise all the exceptions that would be
raised by the softfloat code, and those instructions are made to save
and restore the softfloat exception state accordingly.

Nothing is done about "denormal operand"; setting that (only for the
case when input denormals are *not* flushed to zero, the opposite of
the logic in the softfloat code for such an exception) will require
custom code for relevant instructions, or else architecture-specific
conditionals in the softfloat code for when to set such an exception
together with custom code for various SSE conversion and rounding
instructions that do not set that exception.

Nothing is done about trapping exceptions (for which there is minimal
and largely broken support in QEMU's emulation in the x87 case and no
support at all in the SSE case).

Signed-off-by: Joseph Myers <joseph@codesourcery.com>
Message-Id: <alpine.DEB.2.21.2006252358000.3832@digraph.polyomino.org.uk>
Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
2020-07-10 18:02:17 -04:00
..
acceptance tests/acceptance: Add a test for the sun4u sparc64 machine 2020-07-06 09:32:59 +02:00
data virtio,acpi: features, fixes, cleanups. 2020-07-07 17:37:44 +01:00
decode decodetree: Drop check for less than 2 patterns in a group 2020-06-09 09:19:48 -07:00
docker tests/docker: Added docker build support for TSan. 2020-06-16 14:49:05 +01:00
fp softfloat: Change tininess_before_rounding to bool 2020-05-19 08:41:16 -07:00
guest-debug tests/guest-debug: catch hanging guests 2020-05-15 15:25:07 +01:00
image-fuzzer image-fuzzer: Use OSerror.strerror instead of tuple subscript 2019-11-05 16:36:11 +01:00
keys
migration tests/migration: fix unreachable path in stress test 2020-06-17 17:48:39 +01:00
multiboot tests/multiboot: Fix load address of test kernels 2019-07-30 12:25:43 +02:00
perf/block/qcow2 tests/perf: Test lseek influence on qcow2 block-status 2019-06-04 15:20:41 +02:00
plugin configure: Add -Wno-psabi 2020-06-18 10:26:02 +01:00
qapi-schema qapi: New special feature flag "deprecated" 2020-03-17 21:42:47 +01:00
qemu-iotests block/vpc: return ZERO block-status when appropriate 2020-07-06 10:32:38 +02:00
qtest tests/qmp-cmd-test: Add qmp/object-add-failure-modes 2020-07-10 18:02:16 -04:00
rocker
tcg target/i386: fix IEEE SSE floating-point exception raising 2020-07-10 18:02:17 -04:00
tsan tests/docker: Added docker build support for TSan. 2020-06-16 14:49:05 +01:00
uefi-test-tools edk2 build scripts: work around TianoCore#1607 without forcing Python 2 2019-10-07 15:14:15 +02:00
vm tests/vm: Remove flex/bison packages 2020-06-08 17:04:19 +01:00
vmstate-static-checker-data
.gitignore tests/tcg/aarch64: add a gdbstub testcase for SVE registers 2020-03-17 17:38:47 +00:00
atomic64-bench.c
atomic_add-bench.c
benchmark-crypto-cipher.c tests: benchmark crypto with fixed data size, not time period 2019-10-28 13:32:21 +01:00
benchmark-crypto-hash.c crypto: extend hash benchmark to cover more algorithms 2020-05-07 12:52:51 +01:00
benchmark-crypto-hmac.c
check-block-qdict.c tests: Use error_free_or_abort() where appropriate 2020-07-02 06:25:28 +02:00
check-block.sh check-block: enable iotests with SafeStack 2020-06-23 15:46:05 +01:00
check-qdict.c tests: Move qdict-test-data.txt to tests/data/qobject/ 2019-03-07 22:05:54 +01:00
check-qjson.c test: Use g_strndup instead of plain strndup 2019-08-21 10:27:13 +02:00
check-qlist.c qobject: Eliminate qlist_iter(), use QLIST_FOREACH_ENTRY() instead 2020-04-30 06:51:15 +02:00
check-qlit.c
check-qnull.c
check-qnum.c
check-qobject.c tests: Use &error_abort where appropriate 2020-07-02 06:25:28 +02:00
check-qom-interface.c
check-qom-proplist.c tests: Use error_free_or_abort() where appropriate 2020-07-02 06:25:28 +02:00
check-qstring.c
crypto-tls-psk-helpers.c
crypto-tls-psk-helpers.h Supply missing header guards 2019-06-12 13:20:21 +02:00
crypto-tls-x509-helpers.c
crypto-tls-x509-helpers.h Supply missing header guards 2019-06-12 13:20:21 +02:00
dbus-vmstate-daemon.sh tests: add dbus-vmstate-test 2020-01-06 18:41:32 +04:00
io-channel-helpers.c
io-channel-helpers.h Normalize position of header guard 2019-06-12 13:20:20 +02:00
iothread.c tests/iothread: Always connect iothread GSource to a GMainContext 2020-01-07 14:32:57 +00:00
iothread.h
Makefile.include tests: Inject test name also when the test fails 2020-07-10 18:02:15 -04:00
pkix_asn1_tab.c
ptimer-test-stubs.c util/qemu-timer: refactor deadline calculation for external timers 2019-08-20 17:26:21 +02:00
ptimer-test.c tests/ptimer: Remove unnecessary inclusion of libqtest.h 2020-01-12 11:42:40 +01:00
ptimer-test.h
qht-bench.c qht: Fix threshold rate calculation 2020-06-19 18:29:11 +01:00
rcutorture.c tests/rcutorture: mild documenting refactor of update thread 2020-02-25 17:42:59 +00:00
requirements.txt Acceptance test: add "boot_linux" tests 2020-03-17 18:55:52 -04:00
socket-helpers.c tests: specify the address family when checking bind 2019-08-22 17:30:25 +04:00
socket-helpers.h tests: specify the address family when checking bind 2019-08-22 17:30:25 +04:00
test-aio-multithread.c tests: Do not use "\n" in g_test_message() strings 2019-03-07 22:16:22 +01:00
test-aio.c util/async: make bh_aio_poll() O(1) 2020-02-22 08:26:47 +00:00
test-authz-list.c Include qemu/module.h where needed, drop it from qemu-common.h 2019-06-12 13:18:33 +02:00
test-authz-listfile.c Include qemu/module.h where needed, drop it from qemu-common.h 2019-06-12 13:18:33 +02:00
test-authz-pam.c Include qemu/module.h where needed, drop it from qemu-common.h 2019-06-12 13:18:33 +02:00
test-authz-simple.c Include qemu/module.h where needed, drop it from qemu-common.h 2019-06-12 13:18:33 +02:00
test-base64.c tests: Use error_free_or_abort() where appropriate 2020-07-02 06:25:28 +02:00
test-bdrv-drain.c block: Drop @child_class from bdrv_child_perm() 2020-05-18 19:05:25 +02:00
test-bdrv-graph-mod.c tests: Use error_free_or_abort() where appropriate 2020-07-02 06:25:28 +02:00
test-bitcnt.c
test-bitmap.c tests: use g_test_rand_int 2019-12-17 09:05:23 +01:00
test-bitops.c
test-block-backend.c Include qemu/main-loop.h less 2019-08-16 13:31:52 +02:00
test-block-iothread.c tests: Use error_free_or_abort() where appropriate 2020-07-02 06:25:28 +02:00
test-blockjob-txn.c job: drop job_drain 2019-09-10 08:58:43 +02:00
test-blockjob.c job: take each job's lock individually in job_txn_apply 2020-04-07 14:34:47 +02:00
test-bufferiszero.c
test-char.c chardev: Use QEMUChrEvent enum in IOEventHandler typedef 2020-01-08 11:15:35 +01:00
test-clone-visitor.c
test-coroutine.c tests: Do not use "\n" in g_test_message() strings 2019-03-07 22:16:22 +01:00
test-crypto-afsplit.c
test-crypto-block.c Include qemu/module.h where needed, drop it from qemu-common.h 2019-06-12 13:18:33 +02:00
test-crypto-cipher.c tests: Use error_free_or_abort() where appropriate 2020-07-02 06:25:28 +02:00
test-crypto-hash.c
test-crypto-hmac.c
test-crypto-ivgen.c
test-crypto-pbkdf.c
test-crypto-secret.c test-crypto-secret: add 'secret_keyring' object tests. 2020-06-15 11:33:51 +01:00
test-crypto-tlscredsx509.c glib: use portable g_setenv() 2019-12-17 09:05:23 +01:00
test-crypto-tlssession.c glib: use portable g_setenv() 2019-12-17 09:05:23 +01:00
test-crypto-xts.c
test-cutils.c
test-hbitmap.c block/dirty-bitmap: improve _next_dirty_area API 2020-03-18 14:03:46 -04:00
test-image-locking.c Include qemu/main-loop.h less 2019-08-16 13:31:52 +02:00
test-int128.c
test-io-channel-buffer.c Include qemu/module.h where needed, drop it from qemu-common.h 2019-06-12 13:18:33 +02:00
test-io-channel-command.c Include qemu/module.h where needed, drop it from qemu-common.h 2019-06-12 13:18:33 +02:00
test-io-channel-file.c Include qemu/module.h where needed, drop it from qemu-common.h 2019-06-12 13:18:33 +02:00
test-io-channel-socket.c socket: Add num connections to qio_channel_socket_async() 2019-09-03 23:24:42 +02:00
test-io-channel-tls.c glib: use portable g_setenv() 2019-12-17 09:05:23 +01:00
test-io-task.c tests: Use error_free_or_abort() where appropriate 2020-07-02 06:25:28 +02:00
test-iov.c
test-keyval.c test-keyval: Tighten test of trailing crap after size 2019-12-18 12:28:44 +01:00
test-logging.c tests: Use &error_abort where appropriate 2020-07-02 06:25:28 +02:00
test-mul64.c
test-opts-visitor.c
test-qapi-util.c
test-qdev-global-props.c qdev: Convert bus-less devices to qdev_realize() with Coccinelle 2020-06-15 22:06:04 +02:00
test-qdist.c
test-qemu-opts.c tests: Use &error_abort where appropriate 2020-07-02 06:25:28 +02:00
test-qga.c tests: use g_test_rand_int 2019-12-17 09:05:23 +01:00
test-qgraph.c tests: test-qgraph: fix a memory leak 2019-03-11 16:33:49 +01:00
test-qht-par.c
test-qht.c
test-qmp-cmds.c qapi: Add feature flags to remaining definitions 2020-03-17 19:58:34 +01:00
test-qmp-event.c tests/test-qmp-event: Check event is actually emitted 2020-03-17 19:58:34 +01:00
test-qobject-input-visitor.c
test-qobject-output-visitor.c qapi: Assert output visitors see only valid enum values 2020-04-30 07:26:09 +02:00
test-rcu-list.c tests: Fix a bug with count variables 2020-03-06 10:35:15 +00:00
test-rcu-simpleq.c
test-rcu-slist.c rcu_queue: add QSLIST functions 2020-02-22 08:26:47 +00:00
test-rcu-tailq.c
test-replication.c tests: Use &error_abort where appropriate 2020-07-02 06:25:28 +02:00
test-shift128.c
test-string-input-visitor.c tests: Use &error_abort where appropriate 2020-07-02 06:25:28 +02:00
test-string-output-visitor.c tests: Use &error_abort where appropriate 2020-07-02 06:25:28 +02:00
test-thread-pool.c test-thread-pool: be more reliable 2019-06-03 14:03:00 +02:00
test-throttle.c test-throttle: Fix uninitialized use of burst_length 2019-08-20 17:26:19 +02:00
test-timed-average.c
test-util-filemonitor.c test-util-filemonitor: Plug unlikely memory leak 2020-07-02 06:25:29 +02:00
test-util-sockets.c tests/util-sockets: add abstract unix socket cases 2020-05-20 10:34:45 +01:00
test-uuid.c
test-visitor-serialization.c
test-vmstate.c test-vmstate: Fix memleaks in test_load_qlist 2020-02-28 09:25:49 +01:00
test-write-threshold.c
test-x86-cpuid.c hw/i386: Update structures to save the number of nodes per package 2020-03-17 19:48:10 -04:00
test-xbzrle.c
vhost-user-bridge.c core: replace getpagesize() with qemu_real_host_page_size 2019-10-26 15:38:06 +02:00