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unicorn/qemu
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Peter Maydell 5899803c3c
target/i386: Return 'indefinite integer value' for invalid SSE fp->int conversions 
The x86 architecture requires that all conversions from floating
point to integer which raise the 'invalid' exception (infinities of
both signs, NaN, and all values which don't fit in the destination
integer) return what the x86 spec calls the "indefinite integer
value", which is 0x8000_0000 for 32-bits or 0x8000_0000_0000_0000 for
64-bits. The softfloat functions return the more usual behaviour of
positive overflows returning the maximum value that fits in the
destination integer format and negative overflows returning the
minimum value that fits.

Wrap the softfloat functions in x86-specific versions which
detect the 'invalid' condition and return the indefinite integer.

Note that we don't use these wrappers for the 3DNow! pf2id and pf2iw
instructions, which do return the minimum value that fits in
an int32 if the input float is a large negative number.

Fixes: https://bugs.launchpad.net/qemu/+bug/1815423

Backports commit 1e8a98b53867f61da9ca09f411288e2085d323c4 from qemu
2019-11-18 21:48:03 -05:00
..
accel Revert "cputlb: Filter flushes on already clean tlbs" 2019-06-30 19:21:20 -04:00
crypto
default-configs target/riscv: Initial introduction of the RISC-V target 2019-03-08 21:46:10 -05:00
docs docs/devel/memory.txt: Document _with_attrs accessors 2018-10-04 04:46:26 -04:00
fpu fpu: rename softfloat-specialize.h -> .inc.c 2019-11-18 21:12:30 -05:00
hw i386: Update new x86_apicid parsing rules with die_offset support 2019-08-08 18:22:03 -04:00
include configure: Define target access alignment in configure 2019-11-18 21:41:35 -05:00
qapi qapi: Rewrite string-input-visitor's integer and list parsing 2018-12-18 04:57:25 -05:00
qobject qstring: Move qstring_from_substr()'s @end one to the right 2018-08-02 21:24:19 -04:00
qom cpu: Move icount_decr to CPUNegativeOffsetState 2019-06-13 15:34:28 -04:00
scripts decodetree: Suppress redundant declaration warnings 2019-11-18 21:21:30 -05:00
target target/i386: Return 'indefinite integer value' for invalid SSE fp->int conversions 2019-11-18 21:48:03 -05:00
tcg configure: Define target access alignment in configure 2019-11-18 21:41:35 -05:00
util util/cacheinfo: Use uint64_t on LLP64 model to satisfy Windows ARM64 2019-05-09 17:43:27 -04:00
aarch64.h target/arm: Remove helper_double_saturate 2019-11-18 20:13:21 -05:00
aarch64eb.h target/arm: Remove helper_double_saturate 2019-11-18 20:13:21 -05:00
accel.c clean-up: removed duplicate #includes 2018-02-28 08:51:56 -05:00
arm.h target/arm: Remove helper_double_saturate 2019-11-18 20:13:21 -05:00
armeb.h target/arm: Remove helper_double_saturate 2019-11-18 20:13:21 -05:00
CODING_STYLE
configure configure: Define target access alignment in configure 2019-11-18 21:41:35 -05:00
COPYING
COPYING.LIB
cpus.c Include qapi/error.h exactly where needed 2018-03-07 12:26:38 -05:00
exec.c exec.c: refactor function flatview_add_to_dispatch() 2019-03-11 17:00:46 -04:00
gen_all_header.sh
glib_compat.c target/arm/translate: Synchronize with Qemu 2019-04-27 10:13:01 -04:00
HACKING HACKING: document preference for g_new instead of g_malloc 2018-05-22 00:30:50 -04:00
header_gen.py target/arm: Remove helper_double_saturate 2019-11-18 20:13:21 -05:00
ioport.c hw: remove pio_addr_t 2018-02-24 02:43:16 -05:00
LICENSE
m68k.h target/arm: Remove helper_double_saturate 2019-11-18 20:13:21 -05:00
Makefile Makefile: Rename targets for make recursion 2019-08-08 17:26:49 -04:00
Makefile.objs qapi: Move qapi-schema.json to qapi/, rename generated files 2018-03-09 11:35:11 -05:00
Makefile.target configure: Remove old -fno-gcse workaround for GCC 4.6.x and 4.7.[012] 2018-12-18 03:52:36 -05:00
memory.c memory: Align MemoryRegionSections fields 2019-11-18 16:42:47 -05:00
memory_ldst.inc.c exec: Fix MAP_RAM for cached access 2018-07-03 01:11:12 -04:00
memory_mapping.c include/qemu/osdep.h: Don't include qapi/error.h 2018-02-21 23:08:18 -05:00
mips.h target/arm: Remove helper_double_saturate 2019-11-18 20:13:21 -05:00
mips64.h target/arm: Remove helper_double_saturate 2019-11-18 20:13:21 -05:00
mips64el.h target/arm: Remove helper_double_saturate 2019-11-18 20:13:21 -05:00
mipsel.h target/arm: Remove helper_double_saturate 2019-11-18 20:13:21 -05:00
powerpc.h target/arm: Remove helper_double_saturate 2019-11-18 20:13:21 -05:00
qemu-timer.c timer/cpus: fix some typos and update some comments 2018-02-25 23:21:57 -05:00
riscv32.h target/arm: Remove helper_double_saturate 2019-11-18 20:13:21 -05:00
riscv64.h target/arm: Remove helper_double_saturate 2019-11-18 20:13:21 -05:00
rules.mak build-sys: silence make by default or V=0 2018-03-06 08:58:03 -05:00
sparc.h target/arm: Remove helper_double_saturate 2019-11-18 20:13:21 -05:00
sparc64.h target/arm: Remove helper_double_saturate 2019-11-18 20:13:21 -05:00
unicorn_common.h unicorn_common: Fix unicorn memory functions failing 2018-09-03 10:40:14 -04:00
VERSION Open 4.2 development tree 2019-11-18 16:42:51 -05:00
vl.c Use cpu_create(type) instead of cpu_init(cpu_model) 2018-03-20 14:20:30 -04:00
vl.h
x86_64.h target/arm: Remove helper_double_saturate 2019-11-18 20:13:21 -05:00