Convert the Neon narrowing moves VMQNV, VQMOVN, VQMOVUN in the 2-reg-misc
group to decodetree.
Backports commit 3882bdacb0ad548864b9f2582a32bb5c785e3165 from qemu
Convert the pairwise ops VPADDL and VPADAL in the 2-reg-misc grouping
to decodetree.
At this point we can get rid of the weird CPU_V001 #define that was
used to avoid having to explicitly list all the arguments being
passed to some TCG gen/helper functions.
Backports commit 6106af3aa2304fccee91a3a90138352b0c2af998 from qemu
Convert the Neon VDUP (scalar) insn to decodetree. (Note that we
can't call this just "VDUP" as we used that already in vfp.decode for
the "VDUP (general purpose register" insn.)
Backports commit 9aaa23c2ae18e6fb9a291b81baf91341db76dfa0 from qemu
Convert the Neon VTBL, VTBX instructions to decodetree. The actual
implementation of the insn is copied across to the new trans function
unchanged except for renaming 'tmp5' to 'tmp4'.
Backports commit 54e96c744b70a5d19f14b212a579dd3be8fcaad9 from qemu
Convert the Neon VEXT insn to decodetree. Rather than keeping the
old implementation which used fixed temporaries cpu_V0 and cpu_V1
and did the extraction with by-hand shift and logic ops, we use
the TCG extract2 insn.
We don't need to special case 0 or 8 immediates any more as the
optimizer is smart enough to throw away the dead code.
Backports commit 0aad761fb0aed40c99039eacac470cbd03d07019 from qemu
Convert the Neon 2-reg-scalar long multiplies to decodetree.
These are the last instructions in the group.
Backports commit 77e576a9281825fc170f3b3af83f47e110549b5c from qemu
Convert the float versions of VMLA, VMLS and VMUL in the Neon
2-reg-scalar group to decodetree.
Backports commit 85ac9aef9a5418de3168df569e21258e853840a2 from qemu
Convert the VMLA, VMLS and VMUL insns in the Neon "2 registers and a
scalar" group to decodetree. These are 32x32->32 operations where
one of the inputs is the scalar, followed by a possible accumulate
operation of the 32-bit result.
The refactoring removes some of the oddities of the old decoder:
* operands to the operation and accumulation were often
reversed (taking advantage of the fact that most of these ops
are commutative); the new code follows the pseudocode order
* the Q bit in the insn was in a local variable 'u'; in the
new code it is decoded into a->q
Backports commit 96fc80f5f186decd1a649f6c04252faceb057ad2 from qemu
In commit 37bfce81b10450071 we accidentally introduced a leak of a TCG
temporary in do_2shift_env_64(); free it.
Backports commit a4f67e180def790ff0bbb33fc93bb6e80382f041 from qemu
Mark the arrays of function pointers in trans_VSHLL_S_2sh() and
trans_VSHLL_U_2sh() as both 'static' and 'const'.
Backports commit 448f0e5f3ecfbd089b934e5e3aa0ccd1f51a6174 from qemu
Convert the Neon 3-reg-diff insn polynomial VMULL. This is the last
insn in this group to be converted.
Backports commit 18fb58d588898550919392277787979ee7d0d84e from qemu
Convert the Neon 3-reg-diff insns VQDMULL, VQDMLAL and VQDMLSL:
these are all saturating doubling long multiplies with a possible
accumulate step.
These are the last insns in the group which use the pass-over-each
elements loop, so we can delete that code.
Backports commit 9546ca5998d3cbd98a81b2d46a2e92a11b0f78a4 from qemu
Convert the Neon 3-reg-diff insns VMULL, VMLAL and VMLSL; these perform
a 32x32->64 multiply with possible accumulate.
Note that for VMLSL we do the accumulate directly with a subtraction
rather than doing a negate-then-add as the old code did.
Backports commit 3a1d9eb07b767a7592abca642af80906f9eab0ed from qemu
Convert the Neon 3-reg-diff insns VABAL and VABDL to decodetree.
Like almost all the remaining insns in this group, these are
a combination of a two-input operation which returns a double width
result and then a possible accumulation of that double width
result into the destination.
Backports commit f5b28401200ec95ba89552df3ecdcdc342f6b90b from qemu
Convert the narrow-to-high-half insns VADDHN, VSUBHN, VRADDHN,
VRSUBHN in the Neon 3-registers-different-lengths group to
decodetree.
Backports commit 0fa1ab0302badabc3581aefcbb2f189ef52c4985 from qemu
Convert the "pre-widening" insns VADDL, VSUBL, VADDW and VSUBW
in the Neon 3-registers-different-lengths group to decodetree.
These insns work by widening one or both inputs to double their
size, performing an add or subtract at the doubled size and
then storing the double-size result.
As usual, rather than copying the loop of the original decoder
(which needs awkward code to avoid problems when source and
destination registers overlap) we just unroll the two passes.
Backports commit b28be09570d0827969b62b8f82b0f720a9915427 from qemu
The widenfn() in do_vshll_2sh() does not free the input 32-bit
TCGv, so we need to do this in the calling code.
Backports commit 9593a3988c3e788790aa107d778386b09f456a6d from qemu
The miscellaneous control instructions are mutually exclusive
within the t32 decode sub-group.
Backports commit d6084fba47bb9aef79775c1102d4b647eb58c365 from qemu
Convert the insns in the one-register-and-immediate group to decodetree.
In the new decode, our asimd_imm_const() function returns a 64-bit value
rather than a 32-bit one, which means we don't need to treat cmode=14 op=1
as a special case in the decoder (it is the only encoding where the two
halves of the 64-bit value are different).
Backports commit 2c35a39eda0b16c2ed85c94cec204bf5efb97812 from qemu
Convert the VCVT fixed-point conversion operations in the
Neon 2-regs-and-shift group to decodetree.
Backports commit 3da26f11711caeaa18318b6afa14dfb81d7650ab from qemu
Convert the VSHLL and VMOVL insns from the 2-reg-shift group
to decodetree. Since the loop always has two passes, we unroll
it to avoid the awkward reassignment of one TCGv to another.
Backports commit 968bf842742a5ffbb0041cb31089e61a9f7a833d from qemu
Convert the VQSHLU and QVSHL 2-reg-shift insns to decodetree.
These are the last of the simple shift-by-immediate insns.
Backports commit 37bfce81b10450071193c8495a07f182ec652e2a from qemu
Convert the VSHR 2-reg-shift insns to decodetree.
Note that unlike the legacy decoder, we present the right shift
amount to the trans_ function as a positive integer.
Backports commit 66432d6b8294e3508218b360acfdf7c244eea993 from qemu
Convert the VSHL and VSLI insns from the Neon 2-registers-and-a-shift
group to decodetree.
Backports commit d3c8c736f8b4bdd02831076286b1788232f46ced from qemu
Rather than passing an opcode to a helper, fully decode the
operation at translate time. Use clear_tail_16 to zap the
balance of the SVE register with the AdvSIMD write.
Backports commit 43fa36c96c24349145497adc1b451f9caf74e344 from qemu
Rather than passing an opcode to a helper, fully decode the
operation at translate time. Use clear_tail_16 to zap the
balance of the SVE register with the AdvSIMD write.
Backports commit afc8b7d32668547308bdd654a63cf5228936e0ba from qemu
Do not yet convert the helpers to loop over opr_sz, but the
descriptor allows the vector tail to be cleared. Which fixes
an existing bug vs SVE.
Backports commit effa992f153f5e7ab97ab843b565690748c5b402 from qemu
Do not yet convert the helpers to loop over opr_sz, but the
descriptor allows the vector tail to be cleared. Which fixes
an existing bug vs SVE.
Backports commit aaffebd6d3135b8aed7e61932af53b004d261579 from qemu
With this conversion, we will be able to use the same helpers
with sve. This also fixes a bug in which we failed to clear
the high bits of the SVE register after an AdvSIMD operation.
Backports commit 1738860d7e60dec5dbeba17f8b44d31aae3accac from qemu
With this conversion, we will be able to use the same helpers
with sve. In particular, pass 3 vector parameters for the
3-operand operations; for advsimd the destination register
is also an input.
This also fixes a bug in which we failed to clear the high bits
of the SVE register after an AdvSIMD operation.
Backports commit a04b68e1d4c4f0cd5cd7542697b1b230b84532f5 from qemu
Using the MSR instruction to write to CPSR.E is deprecated, but it is
required to work from any mode including unprivileged code. We were
incorrectly forbidding usermode code from writing it because
CPSR_USER did not include the CPSR_E bit.
We use CPSR_USER in only three places:
* as the mask of what to allow userspace MSR to write to CPSR
* when deciding what bits a linux-user signal-return should be
able to write from the sigcontext structure
* in target_user_copy_regs() when we set up the initial
registers for the linux-user process
In the first two cases not being able to update CPSR.E is a bug, and
in the third case it doesn't matter because CPSR.E is always 0 there.
So we can fix both bugs by adding CPSR_E to CPSR_USER.
Because the cpsr_write() in restore_sigcontext() is now changing
a CPSR bit which is cached in hflags, we need to add an
arm_rebuild_hflags() call there; the callsite in
target_user_copy_regs() was already rebuilding hflags for other
reasons.
(The recommended way to change CPSR.E is to use the 'SETEND'
instruction, which we do correctly allow from usermode code.)
Backports commit 268b1b3dfbb92a9348406f728a33f39e3d8dcd8a from qemu
Do not explicitly store zero to the NEON high part
when we can pass !is_q to clear_vec_high.
Backports commit e1f778596ebfa8782276f4dd4651f2b285d734ff from qemu
The 8-byte store for the end a !is_q operation can be
merged with the other stores. Use a no-op vector move
to trigger the expand_clr portion of tcg_gen_gvec_mov.
Backports commit 5c27392dd08bd8534893abf25ef501f1bd8680fe from qemu
Give the previously unnamed enum a typedef name. Use it in the
prototypes of compare functions. Use it to hold the results
of the compare functions.
Backports commit 71bfd65c5fcd72f8af2735905415c7ce4220f6dc from qemu
Give the previously unnamed enum a typedef name. Use the packed
attribute so that we do not affect the layout of the float_status
struct. Use it in the prototypes of relevant functions.
Adjust switch statements as necessary to avoid compiler warnings.
Backports commit 3dede407cc61b64997f0c30f6dbf4df09949abc9 from qemu
The existing f{32,64}_addsub_post test, which checks for zero
inputs, is identical to f{32,64}_mul_fast_test. Which means
we can eliminate the fast_test/fast_op hooks in favor of
reusing the same post hook.
This means we have one fewer test along the fast path for multiply.
Backports commit b240c9c497b9880ac0ba29465907d5ebecd48083 from qemu
Convert the Neon floating point VFMA and VFMS insn to decodetree.
These are the last insns in the 3-reg-same group so we can
remove all the support/loop code from the old decoder.
Backports commit e95485f85657be21135c17a9226e297c21e73360 from qemu
Convert the Neon fp VMAX/VMIN/VMAXNM/VMINNM/VRECPS/VRSQRTS 3-reg-same
insns to decodetree. (These are all the remaining non-accumulation
instructions in this group.)
Backports commit d5fdf9e9e1c6f2bbb0a4bcaafd85d344cce9c298 from qemu
The usual location for the env argument in the argument list of a TCG helper
is immediately after the return-value argument. recps_f32 and rsqrts_f32
differ in that they put it at the end.
Move the env argument to its usual place; this will allow us to
more easily use these helper functions with the gvec APIs.
Backports commit 26c6f695cfd2a3ccddb4d015a25b56f56aa62928 from qemu
Convert the Neon integer 3-reg-same compare insns VCGE, VCGT,
VCEQ, VACGE and VACGT to decodetree.
Backports commit 727ff1d63213e6666e511956903b9e97a339ec7e from qemu
Convert the Neon integer VMUL, VMLA, and VMLS 3-reg-same inssn to
decodetree.
We don't have a gvec helper for multiply-accumulate, so VMLA and VMLS
need a loop function do_3same_fp(). This takes a reads_vd parameter
to do_3same_fp() which tells it to load the old value into vd before
calling the callback function, in the same way that the do_vfp_3op_sp()
and do_vfp_3op_dp() functions in translate-vfp.inc.c work. (The
only uses in this patch pass reads_vd == true, but later commits
will use reads_vd == false.)
This conversion fixes in passing an underdecoding for VMUL
Backports commit 8aa71ead912ca0a9c0d29b74e0976f91952f950a from qemu
