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qemu/target/arm/neon-dp.decode
Richard Henderson d29b17ca3e target/arm: Implement vector float32 to bfloat16 conversion 
This is BFCVT{N,T} for both AArch64 AdvSIMD and SVE,
and VCVT.BF16.F32 for AArch32 NEON.

Reviewed-by: Peter Maydell <peter.maydell@linaro.org>
Signed-off-by: Richard Henderson <richard.henderson@linaro.org>
Message-id: 20210525225817.400336-5-richard.henderson@linaro.org
Signed-off-by: Peter Maydell <peter.maydell@linaro.org>
2021-06-03 16:43:26 +01:00

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# AArch32 Neon data-processing instruction descriptions
#
# Copyright (c) 2020 Linaro, Ltd
#
# This library is free software; you can redistribute it and/or
# modify it under the terms of the GNU Lesser General Public
# License as published by the Free Software Foundation; either
# version 2.1 of the License, or (at your option) any later version.
#
# This library is distributed in the hope that it will be useful,
# but WITHOUT ANY WARRANTY; without even the implied warranty of
# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
# Lesser General Public License for more details.
#
# You should have received a copy of the GNU Lesser General Public
# License along with this library; if not, see <http://www.gnu.org/licenses/>.
#
# This file is processed by scripts/decodetree.py
#
# VFP/Neon register fields; same as vfp.decode
%vm_dp 5:1 0:4
%vn_dp 7:1 16:4
%vd_dp 22:1 12:4
# Encodings for Neon data processing instructions where the T32 encoding
# is a simple transformation of the A32 encoding.
# More specifically, this file covers instructions where the A32 encoding is
# 0b1111_001p_qqqq_qqqq_qqqq_qqqq_qqqq_qqqq
# and the T32 encoding is
# 0b111p_1111_qqqq_qqqq_qqqq_qqqq_qqqq_qqqq
# This file works on the A32 encoding only; calling code for T32 has to
# transform the insn into the A32 version first.
######################################################################
# 3-reg-same grouping:
# 1111 001 U 0 D sz:2 Vn:4 Vd:4 opc:4 N Q M op Vm:4
######################################################################
&3same vm vn vd q size
@3same .... ... . . . size:2 .... .... .... . q:1 . . .... \
&3same vm=%vm_dp vn=%vn_dp vd=%vd_dp
@3same_q0 .... ... . . . size:2 .... .... .... . 0 . . .... \
&3same vm=%vm_dp vn=%vn_dp vd=%vd_dp q=0
# For FP insns the high bit of 'size' is used as part of opcode decode,
# and the 'size' bit is 0 for 32-bit float and 1 for 16-bit float.
# This converts this encoding to the same MO_8/16/32/64 values that the
# integer neon insns use.
%3same_fp_size 20:1 !function=neon_3same_fp_size
@3same_fp .... ... . . . . . .... .... .... . q:1 . . .... \
&3same vm=%vm_dp vn=%vn_dp vd=%vd_dp size=%3same_fp_size
@3same_fp_q0 .... ... . . . . . .... .... .... . 0 . . .... \
&3same vm=%vm_dp vn=%vn_dp vd=%vd_dp q=0 size=%3same_fp_size
VHADD_S_3s 1111 001 0 0 . .. .... .... 0000 . . . 0 .... @3same
VHADD_U_3s 1111 001 1 0 . .. .... .... 0000 . . . 0 .... @3same
VQADD_S_3s 1111 001 0 0 . .. .... .... 0000 . . . 1 .... @3same
VQADD_U_3s 1111 001 1 0 . .. .... .... 0000 . . . 1 .... @3same
VRHADD_S_3s 1111 001 0 0 . .. .... .... 0001 . . . 0 .... @3same
VRHADD_U_3s 1111 001 1 0 . .. .... .... 0001 . . . 0 .... @3same
@3same_logic .... ... . . . .. .... .... .... . q:1 .. .... \
&3same vm=%vm_dp vn=%vn_dp vd=%vd_dp size=0
VAND_3s 1111 001 0 0 . 00 .... .... 0001 ... 1 .... @3same_logic
VBIC_3s 1111 001 0 0 . 01 .... .... 0001 ... 1 .... @3same_logic
VORR_3s 1111 001 0 0 . 10 .... .... 0001 ... 1 .... @3same_logic
VORN_3s 1111 001 0 0 . 11 .... .... 0001 ... 1 .... @3same_logic
VEOR_3s 1111 001 1 0 . 00 .... .... 0001 ... 1 .... @3same_logic
VBSL_3s 1111 001 1 0 . 01 .... .... 0001 ... 1 .... @3same_logic
VBIT_3s 1111 001 1 0 . 10 .... .... 0001 ... 1 .... @3same_logic
VBIF_3s 1111 001 1 0 . 11 .... .... 0001 ... 1 .... @3same_logic
VHSUB_S_3s 1111 001 0 0 . .. .... .... 0010 . . . 0 .... @3same
VHSUB_U_3s 1111 001 1 0 . .. .... .... 0010 . . . 0 .... @3same
VQSUB_S_3s 1111 001 0 0 . .. .... .... 0010 . . . 1 .... @3same
VQSUB_U_3s 1111 001 1 0 . .. .... .... 0010 . . . 1 .... @3same
VCGT_S_3s 1111 001 0 0 . .. .... .... 0011 . . . 0 .... @3same
VCGT_U_3s 1111 001 1 0 . .. .... .... 0011 . . . 0 .... @3same
VCGE_S_3s 1111 001 0 0 . .. .... .... 0011 . . . 1 .... @3same
VCGE_U_3s 1111 001 1 0 . .. .... .... 0011 . . . 1 .... @3same
# The _rev suffix indicates that Vn and Vm are reversed. This is
# the case for shifts. In the Arm ARM these insns are documented
# with the Vm and Vn fields in their usual places, but in the
# assembly the operands are listed "backwards", ie in the order
# Dd, Dm, Dn where other insns use Dd, Dn, Dm. For QEMU we choose
# to consider Vm and Vn as being in different fields in the insn,
# which allows us to avoid special-casing shifts in the trans_
# function code. We would otherwise need to manually swap the operands
# over to call Neon helper functions that are shared with AArch64,
# which does not have this odd reversed-operand situation.
@3same_rev .... ... . . . size:2 .... .... .... . q:1 . . .... \
&3same vn=%vm_dp vm=%vn_dp vd=%vd_dp
VSHL_S_3s 1111 001 0 0 . .. .... .... 0100 . . . 0 .... @3same_rev
VSHL_U_3s 1111 001 1 0 . .. .... .... 0100 . . . 0 .... @3same_rev
# Insns operating on 64-bit elements (size!=0b11 handled elsewhere)
# The _rev suffix indicates that Vn and Vm are reversed (as explained
# by the comment for the @3same_rev format).
@3same_64_rev .... ... . . . 11 .... .... .... . q:1 . . .... \
&3same vm=%vn_dp vn=%vm_dp vd=%vd_dp size=3
{
VQSHL_S64_3s 1111 001 0 0 . .. .... .... 0100 . . . 1 .... @3same_64_rev
VQSHL_S_3s 1111 001 0 0 . .. .... .... 0100 . . . 1 .... @3same_rev
}
{
VQSHL_U64_3s 1111 001 1 0 . .. .... .... 0100 . . . 1 .... @3same_64_rev
VQSHL_U_3s 1111 001 1 0 . .. .... .... 0100 . . . 1 .... @3same_rev
}
{
VRSHL_S64_3s 1111 001 0 0 . .. .... .... 0101 . . . 0 .... @3same_64_rev
VRSHL_S_3s 1111 001 0 0 . .. .... .... 0101 . . . 0 .... @3same_rev
}
{
VRSHL_U64_3s 1111 001 1 0 . .. .... .... 0101 . . . 0 .... @3same_64_rev
VRSHL_U_3s 1111 001 1 0 . .. .... .... 0101 . . . 0 .... @3same_rev
}
{
VQRSHL_S64_3s 1111 001 0 0 . .. .... .... 0101 . . . 1 .... @3same_64_rev
VQRSHL_S_3s 1111 001 0 0 . .. .... .... 0101 . . . 1 .... @3same_rev
}
{
VQRSHL_U64_3s 1111 001 1 0 . .. .... .... 0101 . . . 1 .... @3same_64_rev
VQRSHL_U_3s 1111 001 1 0 . .. .... .... 0101 . . . 1 .... @3same_rev
}
VMAX_S_3s 1111 001 0 0 . .. .... .... 0110 . . . 0 .... @3same
VMAX_U_3s 1111 001 1 0 . .. .... .... 0110 . . . 0 .... @3same
VMIN_S_3s 1111 001 0 0 . .. .... .... 0110 . . . 1 .... @3same
VMIN_U_3s 1111 001 1 0 . .. .... .... 0110 . . . 1 .... @3same
VABD_S_3s 1111 001 0 0 . .. .... .... 0111 . . . 0 .... @3same
VABD_U_3s 1111 001 1 0 . .. .... .... 0111 . . . 0 .... @3same
VABA_S_3s 1111 001 0 0 . .. .... .... 0111 . . . 1 .... @3same
VABA_U_3s 1111 001 1 0 . .. .... .... 0111 . . . 1 .... @3same
VADD_3s 1111 001 0 0 . .. .... .... 1000 . . . 0 .... @3same
VSUB_3s 1111 001 1 0 . .. .... .... 1000 . . . 0 .... @3same
VTST_3s 1111 001 0 0 . .. .... .... 1000 . . . 1 .... @3same
VCEQ_3s 1111 001 1 0 . .. .... .... 1000 . . . 1 .... @3same
VMLA_3s 1111 001 0 0 . .. .... .... 1001 . . . 0 .... @3same
VMLS_3s 1111 001 1 0 . .. .... .... 1001 . . . 0 .... @3same
VMUL_3s 1111 001 0 0 . .. .... .... 1001 . . . 1 .... @3same
VMUL_p_3s 1111 001 1 0 . .. .... .... 1001 . . . 1 .... @3same
VPMAX_S_3s 1111 001 0 0 . .. .... .... 1010 . . . 0 .... @3same_q0
VPMAX_U_3s 1111 001 1 0 . .. .... .... 1010 . . . 0 .... @3same_q0
VPMIN_S_3s 1111 001 0 0 . .. .... .... 1010 . . . 1 .... @3same_q0
VPMIN_U_3s 1111 001 1 0 . .. .... .... 1010 . . . 1 .... @3same_q0
VQDMULH_3s 1111 001 0 0 . .. .... .... 1011 . . . 0 .... @3same
VQRDMULH_3s 1111 001 1 0 . .. .... .... 1011 . . . 0 .... @3same
VPADD_3s 1111 001 0 0 . .. .... .... 1011 . . . 1 .... @3same_q0
VQRDMLAH_3s 1111 001 1 0 . .. .... .... 1011 ... 1 .... @3same
@3same_crypto .... .... .... .... .... .... .... .... \
&3same vm=%vm_dp vn=%vn_dp vd=%vd_dp size=0 q=1
SHA1C_3s 1111 001 0 0 . 00 .... .... 1100 . 1 . 0 .... @3same_crypto
SHA1P_3s 1111 001 0 0 . 01 .... .... 1100 . 1 . 0 .... @3same_crypto
SHA1M_3s 1111 001 0 0 . 10 .... .... 1100 . 1 . 0 .... @3same_crypto
SHA1SU0_3s 1111 001 0 0 . 11 .... .... 1100 . 1 . 0 .... @3same_crypto
SHA256H_3s 1111 001 1 0 . 00 .... .... 1100 . 1 . 0 .... @3same_crypto
SHA256H2_3s 1111 001 1 0 . 01 .... .... 1100 . 1 . 0 .... @3same_crypto
SHA256SU1_3s 1111 001 1 0 . 10 .... .... 1100 . 1 . 0 .... @3same_crypto
VFMA_fp_3s 1111 001 0 0 . 0 . .... .... 1100 ... 1 .... @3same_fp
VFMS_fp_3s 1111 001 0 0 . 1 . .... .... 1100 ... 1 .... @3same_fp
VQRDMLSH_3s 1111 001 1 0 . .. .... .... 1100 ... 1 .... @3same
VADD_fp_3s 1111 001 0 0 . 0 . .... .... 1101 ... 0 .... @3same_fp
VSUB_fp_3s 1111 001 0 0 . 1 . .... .... 1101 ... 0 .... @3same_fp
VPADD_fp_3s 1111 001 1 0 . 0 . .... .... 1101 ... 0 .... @3same_fp_q0
VABD_fp_3s 1111 001 1 0 . 1 . .... .... 1101 ... 0 .... @3same_fp
VMLA_fp_3s 1111 001 0 0 . 0 . .... .... 1101 ... 1 .... @3same_fp
VMLS_fp_3s 1111 001 0 0 . 1 . .... .... 1101 ... 1 .... @3same_fp
VMUL_fp_3s 1111 001 1 0 . 0 . .... .... 1101 ... 1 .... @3same_fp
VCEQ_fp_3s 1111 001 0 0 . 0 . .... .... 1110 ... 0 .... @3same_fp
VCGE_fp_3s 1111 001 1 0 . 0 . .... .... 1110 ... 0 .... @3same_fp
VACGE_fp_3s 1111 001 1 0 . 0 . .... .... 1110 ... 1 .... @3same_fp
VCGT_fp_3s 1111 001 1 0 . 1 . .... .... 1110 ... 0 .... @3same_fp
VACGT_fp_3s 1111 001 1 0 . 1 . .... .... 1110 ... 1 .... @3same_fp
VMAX_fp_3s 1111 001 0 0 . 0 . .... .... 1111 ... 0 .... @3same_fp
VMIN_fp_3s 1111 001 0 0 . 1 . .... .... 1111 ... 0 .... @3same_fp
VPMAX_fp_3s 1111 001 1 0 . 0 . .... .... 1111 ... 0 .... @3same_fp_q0
VPMIN_fp_3s 1111 001 1 0 . 1 . .... .... 1111 ... 0 .... @3same_fp_q0
VRECPS_fp_3s 1111 001 0 0 . 0 . .... .... 1111 ... 1 .... @3same_fp
VRSQRTS_fp_3s 1111 001 0 0 . 1 . .... .... 1111 ... 1 .... @3same_fp
VMAXNM_fp_3s 1111 001 1 0 . 0 . .... .... 1111 ... 1 .... @3same_fp
VMINNM_fp_3s 1111 001 1 0 . 1 . .... .... 1111 ... 1 .... @3same_fp
######################################################################
# 2-reg-and-shift grouping:
# 1111 001 U 1 D immH:3 immL:3 Vd:4 opc:4 L Q M 1 Vm:4
######################################################################
&2reg_shift vm vd q shift size
# Right shifts are encoded as N - shift, where N is the element size in bits.
%neon_rshift_i6 16:6 !function=rsub_64
%neon_rshift_i5 16:5 !function=rsub_32
%neon_rshift_i4 16:4 !function=rsub_16
%neon_rshift_i3 16:3 !function=rsub_8
@2reg_shr_d .... ... . . . ...... .... .... 1 q:1 . . .... \
&2reg_shift vm=%vm_dp vd=%vd_dp size=3 shift=%neon_rshift_i6
@2reg_shr_s .... ... . . . 1 ..... .... .... 0 q:1 . . .... \
&2reg_shift vm=%vm_dp vd=%vd_dp size=2 shift=%neon_rshift_i5
@2reg_shr_h .... ... . . . 01 .... .... .... 0 q:1 . . .... \
&2reg_shift vm=%vm_dp vd=%vd_dp size=1 shift=%neon_rshift_i4
@2reg_shr_b .... ... . . . 001 ... .... .... 0 q:1 . . .... \
&2reg_shift vm=%vm_dp vd=%vd_dp size=0 shift=%neon_rshift_i3
@2reg_shl_d .... ... . . . shift:6 .... .... 1 q:1 . . .... \
&2reg_shift vm=%vm_dp vd=%vd_dp size=3
@2reg_shl_s .... ... . . . 1 shift:5 .... .... 0 q:1 . . .... \
&2reg_shift vm=%vm_dp vd=%vd_dp size=2
@2reg_shl_h .... ... . . . 01 shift:4 .... .... 0 q:1 . . .... \
&2reg_shift vm=%vm_dp vd=%vd_dp size=1
@2reg_shl_b .... ... . . . 001 shift:3 .... .... 0 q:1 . . .... \
&2reg_shift vm=%vm_dp vd=%vd_dp size=0
# Narrowing right shifts: here the Q bit is part of the opcode decode
@2reg_shrn_d .... ... . . . 1 ..... .... .... 0 . . . .... \
&2reg_shift vm=%vm_dp vd=%vd_dp size=3 q=0 \
shift=%neon_rshift_i5
@2reg_shrn_s .... ... . . . 01 .... .... .... 0 . . . .... \
&2reg_shift vm=%vm_dp vd=%vd_dp size=2 q=0 \
shift=%neon_rshift_i4
@2reg_shrn_h .... ... . . . 001 ... .... .... 0 . . . .... \
&2reg_shift vm=%vm_dp vd=%vd_dp size=1 q=0 \
shift=%neon_rshift_i3
# Long left shifts: again Q is part of opcode decode
@2reg_shll_s .... ... . . . 1 shift:5 .... .... 0 . . . .... \
&2reg_shift vm=%vm_dp vd=%vd_dp size=2 q=0
@2reg_shll_h .... ... . . . 01 shift:4 .... .... 0 . . . .... \
&2reg_shift vm=%vm_dp vd=%vd_dp size=1 q=0
@2reg_shll_b .... ... . . . 001 shift:3 .... .... 0 . . . .... \
&2reg_shift vm=%vm_dp vd=%vd_dp size=0 q=0
@2reg_vcvt .... ... . . . 1 ..... .... .... . q:1 . . .... \
&2reg_shift vm=%vm_dp vd=%vd_dp size=2 shift=%neon_rshift_i5
@2reg_vcvt_f16 .... ... . . . 11 .... .... .... . q:1 . . .... \
&2reg_shift vm=%vm_dp vd=%vd_dp size=1 shift=%neon_rshift_i4
VSHR_S_2sh 1111 001 0 1 . ...... .... 0000 . . . 1 .... @2reg_shr_d
VSHR_S_2sh 1111 001 0 1 . ...... .... 0000 . . . 1 .... @2reg_shr_s
VSHR_S_2sh 1111 001 0 1 . ...... .... 0000 . . . 1 .... @2reg_shr_h
VSHR_S_2sh 1111 001 0 1 . ...... .... 0000 . . . 1 .... @2reg_shr_b
VSHR_U_2sh 1111 001 1 1 . ...... .... 0000 . . . 1 .... @2reg_shr_d
VSHR_U_2sh 1111 001 1 1 . ...... .... 0000 . . . 1 .... @2reg_shr_s
VSHR_U_2sh 1111 001 1 1 . ...... .... 0000 . . . 1 .... @2reg_shr_h
VSHR_U_2sh 1111 001 1 1 . ...... .... 0000 . . . 1 .... @2reg_shr_b
VSRA_S_2sh 1111 001 0 1 . ...... .... 0001 . . . 1 .... @2reg_shr_d
VSRA_S_2sh 1111 001 0 1 . ...... .... 0001 . . . 1 .... @2reg_shr_s
VSRA_S_2sh 1111 001 0 1 . ...... .... 0001 . . . 1 .... @2reg_shr_h
VSRA_S_2sh 1111 001 0 1 . ...... .... 0001 . . . 1 .... @2reg_shr_b
VSRA_U_2sh 1111 001 1 1 . ...... .... 0001 . . . 1 .... @2reg_shr_d
VSRA_U_2sh 1111 001 1 1 . ...... .... 0001 . . . 1 .... @2reg_shr_s
VSRA_U_2sh 1111 001 1 1 . ...... .... 0001 . . . 1 .... @2reg_shr_h
VSRA_U_2sh 1111 001 1 1 . ...... .... 0001 . . . 1 .... @2reg_shr_b
VRSHR_S_2sh 1111 001 0 1 . ...... .... 0010 . . . 1 .... @2reg_shr_d
VRSHR_S_2sh 1111 001 0 1 . ...... .... 0010 . . . 1 .... @2reg_shr_s
VRSHR_S_2sh 1111 001 0 1 . ...... .... 0010 . . . 1 .... @2reg_shr_h
VRSHR_S_2sh 1111 001 0 1 . ...... .... 0010 . . . 1 .... @2reg_shr_b
VRSHR_U_2sh 1111 001 1 1 . ...... .... 0010 . . . 1 .... @2reg_shr_d
VRSHR_U_2sh 1111 001 1 1 . ...... .... 0010 . . . 1 .... @2reg_shr_s
VRSHR_U_2sh 1111 001 1 1 . ...... .... 0010 . . . 1 .... @2reg_shr_h
VRSHR_U_2sh 1111 001 1 1 . ...... .... 0010 . . . 1 .... @2reg_shr_b
VRSRA_S_2sh 1111 001 0 1 . ...... .... 0011 . . . 1 .... @2reg_shr_d
VRSRA_S_2sh 1111 001 0 1 . ...... .... 0011 . . . 1 .... @2reg_shr_s
VRSRA_S_2sh 1111 001 0 1 . ...... .... 0011 . . . 1 .... @2reg_shr_h
VRSRA_S_2sh 1111 001 0 1 . ...... .... 0011 . . . 1 .... @2reg_shr_b
VRSRA_U_2sh 1111 001 1 1 . ...... .... 0011 . . . 1 .... @2reg_shr_d
VRSRA_U_2sh 1111 001 1 1 . ...... .... 0011 . . . 1 .... @2reg_shr_s
VRSRA_U_2sh 1111 001 1 1 . ...... .... 0011 . . . 1 .... @2reg_shr_h
VRSRA_U_2sh 1111 001 1 1 . ...... .... 0011 . . . 1 .... @2reg_shr_b
VSRI_2sh 1111 001 1 1 . ...... .... 0100 . . . 1 .... @2reg_shr_d
VSRI_2sh 1111 001 1 1 . ...... .... 0100 . . . 1 .... @2reg_shr_s
VSRI_2sh 1111 001 1 1 . ...... .... 0100 . . . 1 .... @2reg_shr_h
VSRI_2sh 1111 001 1 1 . ...... .... 0100 . . . 1 .... @2reg_shr_b
VSHL_2sh 1111 001 0 1 . ...... .... 0101 . . . 1 .... @2reg_shl_d
VSHL_2sh 1111 001 0 1 . ...... .... 0101 . . . 1 .... @2reg_shl_s
VSHL_2sh 1111 001 0 1 . ...... .... 0101 . . . 1 .... @2reg_shl_h
VSHL_2sh 1111 001 0 1 . ...... .... 0101 . . . 1 .... @2reg_shl_b
VSLI_2sh 1111 001 1 1 . ...... .... 0101 . . . 1 .... @2reg_shl_d
VSLI_2sh 1111 001 1 1 . ...... .... 0101 . . . 1 .... @2reg_shl_s
VSLI_2sh 1111 001 1 1 . ...... .... 0101 . . . 1 .... @2reg_shl_h
VSLI_2sh 1111 001 1 1 . ...... .... 0101 . . . 1 .... @2reg_shl_b
VQSHLU_64_2sh 1111 001 1 1 . ...... .... 0110 . . . 1 .... @2reg_shl_d
VQSHLU_2sh 1111 001 1 1 . ...... .... 0110 . . . 1 .... @2reg_shl_s
VQSHLU_2sh 1111 001 1 1 . ...... .... 0110 . . . 1 .... @2reg_shl_h
VQSHLU_2sh 1111 001 1 1 . ...... .... 0110 . . . 1 .... @2reg_shl_b
VQSHL_S_64_2sh 1111 001 0 1 . ...... .... 0111 . . . 1 .... @2reg_shl_d
VQSHL_S_2sh 1111 001 0 1 . ...... .... 0111 . . . 1 .... @2reg_shl_s
VQSHL_S_2sh 1111 001 0 1 . ...... .... 0111 . . . 1 .... @2reg_shl_h
VQSHL_S_2sh 1111 001 0 1 . ...... .... 0111 . . . 1 .... @2reg_shl_b
VQSHL_U_64_2sh 1111 001 1 1 . ...... .... 0111 . . . 1 .... @2reg_shl_d
VQSHL_U_2sh 1111 001 1 1 . ...... .... 0111 . . . 1 .... @2reg_shl_s
VQSHL_U_2sh 1111 001 1 1 . ...... .... 0111 . . . 1 .... @2reg_shl_h
VQSHL_U_2sh 1111 001 1 1 . ...... .... 0111 . . . 1 .... @2reg_shl_b
VSHRN_64_2sh 1111 001 0 1 . ...... .... 1000 . 0 . 1 .... @2reg_shrn_d
VSHRN_32_2sh 1111 001 0 1 . ...... .... 1000 . 0 . 1 .... @2reg_shrn_s
VSHRN_16_2sh 1111 001 0 1 . ...... .... 1000 . 0 . 1 .... @2reg_shrn_h
VRSHRN_64_2sh 1111 001 0 1 . ...... .... 1000 . 1 . 1 .... @2reg_shrn_d
VRSHRN_32_2sh 1111 001 0 1 . ...... .... 1000 . 1 . 1 .... @2reg_shrn_s
VRSHRN_16_2sh 1111 001 0 1 . ...... .... 1000 . 1 . 1 .... @2reg_shrn_h
VQSHRUN_64_2sh 1111 001 1 1 . ...... .... 1000 . 0 . 1 .... @2reg_shrn_d
VQSHRUN_32_2sh 1111 001 1 1 . ...... .... 1000 . 0 . 1 .... @2reg_shrn_s
VQSHRUN_16_2sh 1111 001 1 1 . ...... .... 1000 . 0 . 1 .... @2reg_shrn_h
VQRSHRUN_64_2sh 1111 001 1 1 . ...... .... 1000 . 1 . 1 .... @2reg_shrn_d
VQRSHRUN_32_2sh 1111 001 1 1 . ...... .... 1000 . 1 . 1 .... @2reg_shrn_s
VQRSHRUN_16_2sh 1111 001 1 1 . ...... .... 1000 . 1 . 1 .... @2reg_shrn_h
# VQSHRN with signed input
VQSHRN_S64_2sh 1111 001 0 1 . ...... .... 1001 . 0 . 1 .... @2reg_shrn_d
VQSHRN_S32_2sh 1111 001 0 1 . ...... .... 1001 . 0 . 1 .... @2reg_shrn_s
VQSHRN_S16_2sh 1111 001 0 1 . ...... .... 1001 . 0 . 1 .... @2reg_shrn_h
# VQRSHRN with signed input
VQRSHRN_S64_2sh 1111 001 0 1 . ...... .... 1001 . 1 . 1 .... @2reg_shrn_d
VQRSHRN_S32_2sh 1111 001 0 1 . ...... .... 1001 . 1 . 1 .... @2reg_shrn_s
VQRSHRN_S16_2sh 1111 001 0 1 . ...... .... 1001 . 1 . 1 .... @2reg_shrn_h
# VQSHRN with unsigned input
VQSHRN_U64_2sh 1111 001 1 1 . ...... .... 1001 . 0 . 1 .... @2reg_shrn_d
VQSHRN_U32_2sh 1111 001 1 1 . ...... .... 1001 . 0 . 1 .... @2reg_shrn_s
VQSHRN_U16_2sh 1111 001 1 1 . ...... .... 1001 . 0 . 1 .... @2reg_shrn_h
# VQRSHRN with unsigned input
VQRSHRN_U64_2sh 1111 001 1 1 . ...... .... 1001 . 1 . 1 .... @2reg_shrn_d
VQRSHRN_U32_2sh 1111 001 1 1 . ...... .... 1001 . 1 . 1 .... @2reg_shrn_s
VQRSHRN_U16_2sh 1111 001 1 1 . ...... .... 1001 . 1 . 1 .... @2reg_shrn_h
VSHLL_S_2sh 1111 001 0 1 . ...... .... 1010 . 0 . 1 .... @2reg_shll_s
VSHLL_S_2sh 1111 001 0 1 . ...... .... 1010 . 0 . 1 .... @2reg_shll_h
VSHLL_S_2sh 1111 001 0 1 . ...... .... 1010 . 0 . 1 .... @2reg_shll_b
VSHLL_U_2sh 1111 001 1 1 . ...... .... 1010 . 0 . 1 .... @2reg_shll_s
VSHLL_U_2sh 1111 001 1 1 . ...... .... 1010 . 0 . 1 .... @2reg_shll_h
VSHLL_U_2sh 1111 001 1 1 . ...... .... 1010 . 0 . 1 .... @2reg_shll_b
# VCVT fixed<->float conversions
VCVT_SH_2sh 1111 001 0 1 . ...... .... 1100 0 . . 1 .... @2reg_vcvt_f16
VCVT_UH_2sh 1111 001 1 1 . ...... .... 1100 0 . . 1 .... @2reg_vcvt_f16
VCVT_HS_2sh 1111 001 0 1 . ...... .... 1101 0 . . 1 .... @2reg_vcvt_f16
VCVT_HU_2sh 1111 001 1 1 . ...... .... 1101 0 . . 1 .... @2reg_vcvt_f16
VCVT_SF_2sh 1111 001 0 1 . ...... .... 1110 0 . . 1 .... @2reg_vcvt
VCVT_UF_2sh 1111 001 1 1 . ...... .... 1110 0 . . 1 .... @2reg_vcvt
VCVT_FS_2sh 1111 001 0 1 . ...... .... 1111 0 . . 1 .... @2reg_vcvt
VCVT_FU_2sh 1111 001 1 1 . ...... .... 1111 0 . . 1 .... @2reg_vcvt
######################################################################
# 1-reg-and-modified-immediate grouping:
# 1111 001 i 1 D 000 imm:3 Vd:4 cmode:4 0 Q op 1 Vm:4
######################################################################
&1reg_imm vd q imm cmode op
%asimd_imm_value 24:1 16:3 0:4
@1reg_imm .... ... . . . ... ... .... .... . q:1 . . .... \
&1reg_imm imm=%asimd_imm_value vd=%vd_dp
# The cmode/op bits here decode VORR/VBIC/VMOV/VMNV, but
# not in a way we can conveniently represent in decodetree without
# a lot of repetition:
# VORR: op=0, (cmode & 1) && cmode < 12
# VBIC: op=1, (cmode & 1) && cmode < 12
# VMOV: everything else
# So we have a single decode line and check the cmode/op in the
# trans function.
Vimm_1r 1111 001 . 1 . 000 ... .... cmode:4 0 . op:1 1 .... @1reg_imm
######################################################################
# Within the "two registers, or three registers of different lengths"
# grouping ([23,4]=0b10), bits [21:20] are either part of the opcode
# decode: 0b11 for VEXT, two-reg-misc, VTBL, and duplicate-scalar;
# or they are a size field for the three-reg-different-lengths and
# two-reg-and-scalar insn groups (where size cannot be 0b11). This
# is slightly awkward for decodetree: we handle it with this
# non-exclusive group which contains within it two exclusive groups:
# one for the size=0b11 patterns, and one for the size-not-0b11
# patterns. This allows us to check that none of the insns within
# each subgroup accidentally overlap each other. Note that all the
# trans functions for the size-not-0b11 patterns must check and
# return false for size==3.
######################################################################
{
[
##################################################################
# Miscellaneous size=0b11 insns
##################################################################
VEXT 1111 001 0 1 . 11 .... .... imm:4 . q:1 . 0 .... \
vm=%vm_dp vn=%vn_dp vd=%vd_dp
VTBL 1111 001 1 1 . 11 .... .... 10 len:2 . op:1 . 0 .... \
vm=%vm_dp vn=%vn_dp vd=%vd_dp
VDUP_scalar 1111 001 1 1 . 11 index:3 1 .... 11 000 q:1 . 0 .... \
vm=%vm_dp vd=%vd_dp size=0
VDUP_scalar 1111 001 1 1 . 11 index:2 10 .... 11 000 q:1 . 0 .... \
vm=%vm_dp vd=%vd_dp size=1
VDUP_scalar 1111 001 1 1 . 11 index:1 100 .... 11 000 q:1 . 0 .... \
vm=%vm_dp vd=%vd_dp size=2
##################################################################
# 2-reg-misc grouping:
# 1111 001 11 D 11 size:2 opc1:2 Vd:4 0 opc2:4 q:1 M 0 Vm:4
##################################################################
&2misc vd vm q size
@2misc .... ... .. . .. size:2 .. .... . .... q:1 . . .... \
&2misc vm=%vm_dp vd=%vd_dp
@2misc_q0 .... ... .. . .. size:2 .. .... . .... . . . .... \
&2misc vm=%vm_dp vd=%vd_dp q=0
@2misc_q1 .... ... .. . .. size:2 .. .... . .... . . . .... \
&2misc vm=%vm_dp vd=%vd_dp q=1
VREV64 1111 001 11 . 11 .. 00 .... 0 0000 . . 0 .... @2misc
VREV32 1111 001 11 . 11 .. 00 .... 0 0001 . . 0 .... @2misc
VREV16 1111 001 11 . 11 .. 00 .... 0 0010 . . 0 .... @2misc
VPADDL_S 1111 001 11 . 11 .. 00 .... 0 0100 . . 0 .... @2misc
VPADDL_U 1111 001 11 . 11 .. 00 .... 0 0101 . . 0 .... @2misc
AESE 1111 001 11 . 11 .. 00 .... 0 0110 0 . 0 .... @2misc_q1
AESD 1111 001 11 . 11 .. 00 .... 0 0110 1 . 0 .... @2misc_q1
AESMC 1111 001 11 . 11 .. 00 .... 0 0111 0 . 0 .... @2misc_q1
AESIMC 1111 001 11 . 11 .. 00 .... 0 0111 1 . 0 .... @2misc_q1
VCLS 1111 001 11 . 11 .. 00 .... 0 1000 . . 0 .... @2misc
VCLZ 1111 001 11 . 11 .. 00 .... 0 1001 . . 0 .... @2misc
VCNT 1111 001 11 . 11 .. 00 .... 0 1010 . . 0 .... @2misc
VMVN 1111 001 11 . 11 .. 00 .... 0 1011 . . 0 .... @2misc
VPADAL_S 1111 001 11 . 11 .. 00 .... 0 1100 . . 0 .... @2misc
VPADAL_U 1111 001 11 . 11 .. 00 .... 0 1101 . . 0 .... @2misc
VQABS 1111 001 11 . 11 .. 00 .... 0 1110 . . 0 .... @2misc
VQNEG 1111 001 11 . 11 .. 00 .... 0 1111 . . 0 .... @2misc
VCGT0 1111 001 11 . 11 .. 01 .... 0 0000 . . 0 .... @2misc
VCGE0 1111 001 11 . 11 .. 01 .... 0 0001 . . 0 .... @2misc
VCEQ0 1111 001 11 . 11 .. 01 .... 0 0010 . . 0 .... @2misc
VCLE0 1111 001 11 . 11 .. 01 .... 0 0011 . . 0 .... @2misc
VCLT0 1111 001 11 . 11 .. 01 .... 0 0100 . . 0 .... @2misc
SHA1H 1111 001 11 . 11 .. 01 .... 0 0101 1 . 0 .... @2misc_q1
VABS 1111 001 11 . 11 .. 01 .... 0 0110 . . 0 .... @2misc
VNEG 1111 001 11 . 11 .. 01 .... 0 0111 . . 0 .... @2misc
VCGT0_F 1111 001 11 . 11 .. 01 .... 0 1000 . . 0 .... @2misc
VCGE0_F 1111 001 11 . 11 .. 01 .... 0 1001 . . 0 .... @2misc
VCEQ0_F 1111 001 11 . 11 .. 01 .... 0 1010 . . 0 .... @2misc
VCLE0_F 1111 001 11 . 11 .. 01 .... 0 1011 . . 0 .... @2misc
VCLT0_F 1111 001 11 . 11 .. 01 .... 0 1100 . . 0 .... @2misc
VABS_F 1111 001 11 . 11 .. 01 .... 0 1110 . . 0 .... @2misc
VNEG_F 1111 001 11 . 11 .. 01 .... 0 1111 . . 0 .... @2misc
VSWP 1111 001 11 . 11 .. 10 .... 0 0000 . . 0 .... @2misc
VTRN 1111 001 11 . 11 .. 10 .... 0 0001 . . 0 .... @2misc
VUZP 1111 001 11 . 11 .. 10 .... 0 0010 . . 0 .... @2misc
VZIP 1111 001 11 . 11 .. 10 .... 0 0011 . . 0 .... @2misc
VMOVN 1111 001 11 . 11 .. 10 .... 0 0100 0 . 0 .... @2misc_q0
# VQMOVUN: unsigned result (source is always signed)
VQMOVUN 1111 001 11 . 11 .. 10 .... 0 0100 1 . 0 .... @2misc_q0
# VQMOVN: signed result, source may be signed (_S) or unsigned (_U)
VQMOVN_S 1111 001 11 . 11 .. 10 .... 0 0101 0 . 0 .... @2misc_q0
VQMOVN_U 1111 001 11 . 11 .. 10 .... 0 0101 1 . 0 .... @2misc_q0
VSHLL 1111 001 11 . 11 .. 10 .... 0 0110 0 . 0 .... @2misc_q0
SHA1SU1 1111 001 11 . 11 .. 10 .... 0 0111 0 . 0 .... @2misc_q1
SHA256SU0 1111 001 11 . 11 .. 10 .... 0 0111 1 . 0 .... @2misc_q1
VRINTN 1111 001 11 . 11 .. 10 .... 0 1000 . . 0 .... @2misc
VRINTX 1111 001 11 . 11 .. 10 .... 0 1001 . . 0 .... @2misc
VRINTA 1111 001 11 . 11 .. 10 .... 0 1010 . . 0 .... @2misc
VRINTZ 1111 001 11 . 11 .. 10 .... 0 1011 . . 0 .... @2misc
VCVT_F16_F32 1111 001 11 . 11 .. 10 .... 0 1100 0 . 0 .... @2misc_q0
VCVT_B16_F32 1111 001 11 . 11 .. 10 .... 0 1100 1 . 0 .... @2misc_q0
VRINTM 1111 001 11 . 11 .. 10 .... 0 1101 . . 0 .... @2misc
VCVT_F32_F16 1111 001 11 . 11 .. 10 .... 0 1110 0 . 0 .... @2misc_q0
VRINTP 1111 001 11 . 11 .. 10 .... 0 1111 . . 0 .... @2misc
VCVTAS 1111 001 11 . 11 .. 11 .... 0 0000 . . 0 .... @2misc
VCVTAU 1111 001 11 . 11 .. 11 .... 0 0001 . . 0 .... @2misc
VCVTNS 1111 001 11 . 11 .. 11 .... 0 0010 . . 0 .... @2misc
VCVTNU 1111 001 11 . 11 .. 11 .... 0 0011 . . 0 .... @2misc
VCVTPS 1111 001 11 . 11 .. 11 .... 0 0100 . . 0 .... @2misc
VCVTPU 1111 001 11 . 11 .. 11 .... 0 0101 . . 0 .... @2misc
VCVTMS 1111 001 11 . 11 .. 11 .... 0 0110 . . 0 .... @2misc
VCVTMU 1111 001 11 . 11 .. 11 .... 0 0111 . . 0 .... @2misc
VRECPE 1111 001 11 . 11 .. 11 .... 0 1000 . . 0 .... @2misc
VRSQRTE 1111 001 11 . 11 .. 11 .... 0 1001 . . 0 .... @2misc
VRECPE_F 1111 001 11 . 11 .. 11 .... 0 1010 . . 0 .... @2misc
VRSQRTE_F 1111 001 11 . 11 .. 11 .... 0 1011 . . 0 .... @2misc
VCVT_FS 1111 001 11 . 11 .. 11 .... 0 1100 . . 0 .... @2misc
VCVT_FU 1111 001 11 . 11 .. 11 .... 0 1101 . . 0 .... @2misc
VCVT_SF 1111 001 11 . 11 .. 11 .... 0 1110 . . 0 .... @2misc
VCVT_UF 1111 001 11 . 11 .. 11 .... 0 1111 . . 0 .... @2misc
]
# Subgroup for size != 0b11
[
##################################################################
# 3-reg-different-length grouping:
# 1111 001 U 1 D sz!=11 Vn:4 Vd:4 opc:4 N 0 M 0 Vm:4
##################################################################
&3diff vm vn vd size
@3diff .... ... . . . size:2 .... .... .... . . . . .... \
&3diff vm=%vm_dp vn=%vn_dp vd=%vd_dp
VADDL_S_3d 1111 001 0 1 . .. .... .... 0000 . 0 . 0 .... @3diff
VADDL_U_3d 1111 001 1 1 . .. .... .... 0000 . 0 . 0 .... @3diff
VADDW_S_3d 1111 001 0 1 . .. .... .... 0001 . 0 . 0 .... @3diff
VADDW_U_3d 1111 001 1 1 . .. .... .... 0001 . 0 . 0 .... @3diff
VSUBL_S_3d 1111 001 0 1 . .. .... .... 0010 . 0 . 0 .... @3diff
VSUBL_U_3d 1111 001 1 1 . .. .... .... 0010 . 0 . 0 .... @3diff
VSUBW_S_3d 1111 001 0 1 . .. .... .... 0011 . 0 . 0 .... @3diff
VSUBW_U_3d 1111 001 1 1 . .. .... .... 0011 . 0 . 0 .... @3diff
VADDHN_3d 1111 001 0 1 . .. .... .... 0100 . 0 . 0 .... @3diff
VRADDHN_3d 1111 001 1 1 . .. .... .... 0100 . 0 . 0 .... @3diff
VABAL_S_3d 1111 001 0 1 . .. .... .... 0101 . 0 . 0 .... @3diff
VABAL_U_3d 1111 001 1 1 . .. .... .... 0101 . 0 . 0 .... @3diff
VSUBHN_3d 1111 001 0 1 . .. .... .... 0110 . 0 . 0 .... @3diff
VRSUBHN_3d 1111 001 1 1 . .. .... .... 0110 . 0 . 0 .... @3diff
VABDL_S_3d 1111 001 0 1 . .. .... .... 0111 . 0 . 0 .... @3diff
VABDL_U_3d 1111 001 1 1 . .. .... .... 0111 . 0 . 0 .... @3diff
VMLAL_S_3d 1111 001 0 1 . .. .... .... 1000 . 0 . 0 .... @3diff
VMLAL_U_3d 1111 001 1 1 . .. .... .... 1000 . 0 . 0 .... @3diff
VQDMLAL_3d 1111 001 0 1 . .. .... .... 1001 . 0 . 0 .... @3diff
VMLSL_S_3d 1111 001 0 1 . .. .... .... 1010 . 0 . 0 .... @3diff
VMLSL_U_3d 1111 001 1 1 . .. .... .... 1010 . 0 . 0 .... @3diff
VQDMLSL_3d 1111 001 0 1 . .. .... .... 1011 . 0 . 0 .... @3diff
VMULL_S_3d 1111 001 0 1 . .. .... .... 1100 . 0 . 0 .... @3diff
VMULL_U_3d 1111 001 1 1 . .. .... .... 1100 . 0 . 0 .... @3diff
VQDMULL_3d 1111 001 0 1 . .. .... .... 1101 . 0 . 0 .... @3diff
VMULL_P_3d 1111 001 0 1 . .. .... .... 1110 . 0 . 0 .... @3diff
##################################################################
# 2-regs-plus-scalar grouping:
# 1111 001 Q 1 D sz!=11 Vn:4 Vd:4 opc:4 N 1 M 0 Vm:4
##################################################################
&2scalar vm vn vd size q
@2scalar .... ... q:1 . . size:2 .... .... .... . . . . .... \
&2scalar vm=%vm_dp vn=%vn_dp vd=%vd_dp
# For the 'long' ops the Q bit is part of insn decode
@2scalar_q0 .... ... . . . size:2 .... .... .... . . . . .... \
&2scalar vm=%vm_dp vn=%vn_dp vd=%vd_dp q=0
VMLA_2sc 1111 001 . 1 . .. .... .... 0000 . 1 . 0 .... @2scalar
VMLA_F_2sc 1111 001 . 1 . .. .... .... 0001 . 1 . 0 .... @2scalar
VMLAL_S_2sc 1111 001 0 1 . .. .... .... 0010 . 1 . 0 .... @2scalar_q0
VMLAL_U_2sc 1111 001 1 1 . .. .... .... 0010 . 1 . 0 .... @2scalar_q0
VQDMLAL_2sc 1111 001 0 1 . .. .... .... 0011 . 1 . 0 .... @2scalar_q0
VMLS_2sc 1111 001 . 1 . .. .... .... 0100 . 1 . 0 .... @2scalar
VMLS_F_2sc 1111 001 . 1 . .. .... .... 0101 . 1 . 0 .... @2scalar
VMLSL_S_2sc 1111 001 0 1 . .. .... .... 0110 . 1 . 0 .... @2scalar_q0
VMLSL_U_2sc 1111 001 1 1 . .. .... .... 0110 . 1 . 0 .... @2scalar_q0
VQDMLSL_2sc 1111 001 0 1 . .. .... .... 0111 . 1 . 0 .... @2scalar_q0
VMUL_2sc 1111 001 . 1 . .. .... .... 1000 . 1 . 0 .... @2scalar
VMUL_F_2sc 1111 001 . 1 . .. .... .... 1001 . 1 . 0 .... @2scalar
VMULL_S_2sc 1111 001 0 1 . .. .... .... 1010 . 1 . 0 .... @2scalar_q0
VMULL_U_2sc 1111 001 1 1 . .. .... .... 1010 . 1 . 0 .... @2scalar_q0
VQDMULL_2sc 1111 001 0 1 . .. .... .... 1011 . 1 . 0 .... @2scalar_q0
VQDMULH_2sc 1111 001 . 1 . .. .... .... 1100 . 1 . 0 .... @2scalar
VQRDMULH_2sc 1111 001 . 1 . .. .... .... 1101 . 1 . 0 .... @2scalar
VQRDMLAH_2sc 1111 001 . 1 . .. .... .... 1110 . 1 . 0 .... @2scalar
VQRDMLSH_2sc 1111 001 . 1 . .. .... .... 1111 . 1 . 0 .... @2scalar
]
}
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