Allow the backend to expand dup from memory directly, instead of
forcing the value into a temp first. This is especially important
if integer/vector register moves do not exist.
Note that officially tcg_out_dupm_vec is allowed to fail.
If it did, we could fix this up relatively easily:
VECE == 32/64:
Load the value into a vector register, then dup.
Both of these must work.
VECE == 8/16:
If the value happens to be at an offset such that an aligned
load would place the desired value in the least significant
end of the register, go ahead and load w/garbage in high bits.
Load the value w/INDEX_op_ld{8,16}_i32.
Attempt a move directly to vector reg, which may fail.
Store the value into the backing store for OTS.
Load the value into the vector reg w/TCG_TYPE_I32, which must work.
Duplicate from the vector reg into itself, which must work.
All of which is well and good, except that all supported
hosts can support dupm for all vece, so all of the failure
paths would be dead code and untestable.
Backports commit 37ee55a081b7863ffab2151068dd1b2f11376914 from qemu
The LD1R instruction does all the work. Note that the only
useful addressing mode is a base register with no offset.
Backports commit f23e5e15edfd49d5dd72cab2ed2d85ac354b2eeb from qemu
This case is similar to INDEX_op_mov_* in that we need to do
different things depending on the current location of the source.
Backports commit bab1671f0fa928fd678a22f934739f06fd5fd035 from qemu
The i386 backend already has these functions, and the aarch64 backend
could easily split out one. Nothing is done with these functions yet,
but this will aid register allocation of INDEX_op_dup_vec in a later patch.
Adjust the aarch64 tcg_out_dupi_vec signature to match the new interface.
Backports commit e7632cfa8b76cdbbc1c76e8737338ef5844e7d60 from qemu
PowerPC Altivec does not support direct moves between vector registers
and general registers. So when tcg_out_mov fails, we can use the
backing memory for the temporary to perform the move.
Backports commit 240c08d0998f402c325fce489de0d14831048128 from qemu
This patch merely changes the interface, aborting on all failures,
of which there are currently none.
Backports commit 78113e83e0007e869c9f0cb4c0497a77538988e3 from qemu
We have a function that takes an additional condition parameter
over the standard backend interface. It already takes care of
eliding no-op moves.
Backports commit c16f52b2c5d91c36e121795bd3b386cea0b7573c from qemu
The only fixed_reg is cpu_env, and it should not be modified
during any TB. Therefore code that tries to special-case moves
into a fixed_reg is dead. Remove it.
Backports commit d63e3b6e694ad6c887be135dddb9cd4893f1a844 from qemu
Replace the single opcode in .opc with a null-terminated
array in .opt_opc. We still require that all opcodes be
used with the same .vece.
Validate the contents of this list with CONFIG_DEBUG_TCG.
All tcg_gen_*_vec functions will check any list active
during .fniv expansion. Swap the active list in and out
as we expand other opcodes, or take control away from the
front-end function.
Convert all existing vector aware front ends.
Backports commit 53229a7703eeb2bbe101a19a33ef22aaf960c65b from qemu
PowerPC Altivec does not support add and subtract of 64-bit elements.
Prepare for that configuration by not assuming the operation is
universally supported.
Backports commit ce27c5d1a38e93da38653af71fb468c5eded4c7b from qemu
Use tcg_can_emit_vec_op instead of just TCG_TARGET_HAS_neg_vec,
so that we check the type and vece for the actual operation.
Backports commit ac383dde33405106469d04a78de1d76f1a730cb1 from qemu
Let's add tcg_gen_gvec_3i(), similar to tcg_gen_gvec_2i(), however
without introducing "gen_helper_gvec_3i *fnoi", as it isn't needed
for now.
Backports commit e1227bb6e59173117f094a6a13b998587b45c928 from qemu
Thereby decoupling the resulting translated code from the current state
of the system.
The tb->cflags field is not passed to tcg generation functions. So
we add a field to TCGContext, storing there a copy of tb->cflags.
Most architectures have <= 32 registers, which results in a 4-byte hole
in TCGContext. Use this hole for the new field.
Backports commit e82d5a2460b0e176128027651ff9b104e4bdf5cc from qemu
This will not necessarily restrict the size of the TB, since for v7
the majority of constant pool usage is for calls from the out-of-line
ldst code, which is already at the end of the TB. But this does
allow us to save one insn per reference on the off-chance.
Backports commit b4b82d7e9caff7ccca5c621817b5a4b8e95eb9b1 from qemu
There is no point in coding for a 2GB offset when the max TB size
is already limited to 64k. If we further restrict to 32k then we
can eliminate the extra ADDIS instruction.
Backports commit a7cdaf710f2aaaf0be855a338dd67463d4bb99e2 from qemu
If the TB generates too much code, such that backend relocations
overflow, try again with a smaller TB. In support of this, move
relocation processing from a random place within tcg_out_op, in
the handling of branch opcodes, to a new function at the end of
tcg_gen_code.
This is not a complete solution, as there are additional relocs
generated for out-of-line ldst handling and constant pools.
Backports commit 7ecd02a06f8f4c0bbf872ecc15e37035b7e1df5f from qemu
If a TB generates too much code, try again with fewer insns.
Fixes: https://bugs.launchpad.net/bugs/1824853
Backports commit 6e6c4efed995d9eca6ae0cfdb2252df830262f50 from qemu
Will be helpful for s390x. Input 128 bit and output 64 bit only,
which is sufficient for now.
Backports commit 2089fcc9e7b4174d1c351eaa7d277c02188a6dd2 from qemu
This ports over the RISC-V architecture from Qemu. This is currently a
very barebones transition. No code hooking or any fancy stuff.
Currently, you can feed it instructions and query the CPU state itself.
This also allows choosing whether or not RISC-V 32-bit or RISC-V 64-bit
is desirable through Unicorn's interface as well.
Extremely basic examples of executing a single instruction have been
added to the samples directory to help demonstrate how to use the basic
functionality.
The last update to this file was 9 years ago. In the meantime,
4 of the 6 ideas have actually been completed. The lat two do
not actually make sense anymore.
Backports commit 9e564a1dde5abc7ae4cebc115142f685d98938d7 from qemu
Completely rewrite conditional stores handling. Use cmpxchg.
This eliminates need for separate implementations of SC instruction
emulation for user and system emulation.
Backports commit 33a07fa2db66376e6ee780d4a8b064dc5118cf34 from qemu
Due to a cut/paste error in the original implementation, the unsigned
vector saturating arithmetic was erroneously being calculated as signed
vector saturating arithmetic.
Fixes: 8ffafbcec2 ("tcg/i386: Implement vector saturating arithmetic")
Backports commit 3115584d39afe8cf2a84a40549029f53792abca5 from qemu
Currently, a jump to a label that is not defined anywhere will
be emitted not be relocated. This results in a jump to a random
jump target. With tcg debugging, print a diagnostic to the -d op
file and abort.
This could help debug or detect errors like
c2d9644e6d ("target/arm: Fix crash on conditional instruction in an IT block")
Backports commit bef16ab4e641636b4e85c3d863b4257ce0be4e6f from qemu
It's either "GNU *Library* General Public version 2" or "GNU Lesser
General Public version *2.1*", but there was no "version 2.0" of the
"Lesser" library. So assume that version 2.1 is meant here.
Backports commit fb0343d5b4dd4b9b9e96e563d913a3e0c709fe4e from qemu
The avx instruction set does not directly provide MO_64.
We can still implement 64-bit with comparison and vpblendvb.
Backports commit bc37faf4cb2baa77c44298c01558970b88d32808 from qemu
Only MO_8 and MO_16 are implemented, since that's all the
instruction set provides.
Backports commit 8ffafbcec275e61f6a1a17ac1d0bd918d5b23db3 from qemu
