xref: /aosp_15_r20/external/llvm/test/MC/Disassembler/ARM/invalid-armv7.txt (revision 9880d6810fe72a1726cb53787c6711e909410d58)

# RUN: not llvm-mc -disassemble %s -mcpu cortex-a8 -triple armv7 2>&1 | FileCheck %s

# This file is checking ARMv7 encodings which are globally invalid, usually due
# to the constraints of the instructions not being met. For example invalid
# combinations of registers.


#------------------------------------------------------------------------------
# Undefined encodings for bfi
#------------------------------------------------------------------------------

# Opcode=60 Name=BFI Format=ARM_FORMAT_DPFRM(4)
#  31 30 29 28 27 26 25 24 23 22 21 20 19 18 17 16 15 14 13 12 11 10  9  8  7  6  5  4  3  2  1  0
# -------------------------------------------------------------------------------------------------
# | 1: 1: 1: 0| 0: 1: 1: 1| 1: 1: 0: 0| 1: 1: 1: 1| 1: 1: 1: 1| 0: 0: 0: 0| 0: 0: 0: 1| 0: 1: 1: 0|
# -------------------------------------------------------------------------------------------------
#
# if d == 15 then UNPREDICTABLE;
[0x16 0xf0 0xcf 0xe7]
# CHECK: potentially undefined instruction encoding
# CHECK-NEXT: [0x16 0xf0 0xcf 0xe7]

#------------------------------------------------------------------------------
# Undefined encodings for cdp2
#------------------------------------------------------------------------------

[0xe0 0x6a 0x0c 0xfe]
# CHECK: invalid instruction encoding
# CHECK-NEXT: [0xe0 0x6a 0x0c 0xfe]


#------------------------------------------------------------------------------
# Undefined encodings for cps*
#------------------------------------------------------------------------------

# invalid imod value (0b01)
[0xc0 0x67 0x4 0xf1]
# CHECK: invalid instruction encoding
# CHECK-NEXT: [0xc0 0x67 0x4 0xf1]

# invalid (imod, M, iflags) combination
[0x93 0x00 0x02 0xf1]
# CHECK: potentially undefined instruction encoding
# CHECK-NEXT: [0x93 0x00 0x02 0xf1]

# CPS: various encodings that are ambiguous with other instructions
[0x9f 0xff 0x4e 0xf1]
# CHECK: invalid instruction encoding
# CHECK-NEXT: [0x9f 0xff 0x4e 0xf1]

[0x80 0x80 0x2c 0xf1]
# CHECK: invalid instruction encoding
# CHECK-NEXT: [0x80 0x80 0x2c 0xf1]

[0xce 0x3f 0x28 0xf1]
# CHECK: invalid instruction encoding
# CHECK-NEXT: [0xce 0x3f 0x28 0xf1]

[0x80 0x00 0x20 0xf1]
# CHECK: invalid instruction encoding
# CHECK-NEXT: [0x80 0x00 0x20 0xf1]

[0xa0 0x00 0x00 0xf1]
# CHECK: invalid instruction encoding
# CHECK-NEXT: [0xa0 0x00 0x00 0xf1]


#------------------------------------------------------------------------------
# Undefined encoding space for hint instructions
#------------------------------------------------------------------------------

# FIXME: is it "dbg #14" or not????
[0xfe 0xf0 0x20 0xe3]
# CHCK: invalid instruction encoding


#------------------------------------------------------------------------------
# Undefined encodings for ldc
#------------------------------------------------------------------------------

# Opcode=0 Name=PHI Format=(42)
#  31 30 29 28 27 26 25 24 23 22 21 20 19 18 17 16 15 14 13 12 11 10  9  8  7  6  5  4  3  2  1  0
# -------------------------------------------------------------------------------------------------
# | 1: 1: 0: 1| 1: 1: 0: 0| 0: 0: 0: 1| 1: 1: 1: 1| 1: 0: 1: 1| 0: 1: 0: 0| 1: 0: 0: 1| 0: 0: 1: 0|
# -------------------------------------------------------------------------------------------------
#
# The bytes have 0b0000 for P,U,D,W; from A8.6.51, it is undefined.

[0x92 0xb4 0x1f 0xdc]
# CHECK: invalid instruction encoding
# CHECK-NEXT: [0x92 0xb4 0x1f 0xdc]


#------------------------------------------------------------------------------
# Undefined encodings for ldm
#------------------------------------------------------------------------------

# Opcode=134 Name=LDMIA Format=ARM_FORMAT_LDSTMULFRM(10)
# 31 30 29 28 27 26 25 24 23 22 21 20 19 18 17 16 15 14 13 12 11 10  9  8  7  6  5  4  3  2  1  0
# -------------------------------------------------------------------------------------------------
# | 1: 1: 1: 1| 1: 0: 0: 0| 1: 0: 0: 1| 1: 0: 0: 1| 1: 0: 1: 1| 0: 0: 0: 1| 0: 0: 1: 1| 0: 0: 1: 0|
# -------------------------------------------------------------------------------------------------
#
# B6.1.8 RFE has Inst{15-0} as 0x0a00 ==> Not an RFE instruction
# A8.6.53 LDM/LDMIA/LDMFD is predicated with Inst{31-28} as cond ==> Not an LDMIA instruction

[0x32 0xb1 0x99 0xf8]
# CHECK: invalid instruction encoding
# CHECK-NEXT: [0x32 0xb1 0x99 0xf8]


#------------------------------------------------------------------------------
# Undefined encodings for ldr
#------------------------------------------------------------------------------

# Opcode=165 Name=LDR_PRE Format=ARM_FORMAT_LDFRM(6)
#  31 30 29 28 27 26 25 24 23 22 21 20 19 18 17 16 15 14 13 12 11 10  9  8  7  6  5  4  3  2  1  0
# -------------------------------------------------------------------------------------------------
# | 1: 1: 1: 0| 0: 1: 1: 1| 1: 0: 1: 1| 0: 1: 1: 1| 0: 1: 1: 0| 0: 0: 0: 0| 1: 0: 0: 0| 1: 1: 1: 1|
# -------------------------------------------------------------------------------------------------
#
# if m == 15 then UNPREDICTABLE

[0x8f 0x60 0xb7 0xe7]
# CHECK: potentially undefined instruction encoding
# CHECK-NEXT: [0x8f 0x60 0xb7 0xe7]

# LDR (register) has encoding Inst{4} = 0.
[0xba 0xae 0x9f 0x57]
# CHECK: invalid instruction encoding
# CHECK-NEXT: [0xba 0xae 0x9f 0x57]

# LDR_PRE/POST has encoding Inst{4} = 0.
[0xde 0x69 0x18 0x46]
# CHECK: invalid instruction encoding
# CHECK-NEXT: [0xde 0x69 0x18 0x46]

# Opcode=140 Name=LDRB_POST Format=ARM_FORMAT_LDFRM(6)
#  31 30 29 28 27 26 25 24 23 22 21 20 19 18 17 16 15 14 13 12 11 10  9  8  7  6  5  4  3  2  1  0
# -------------------------------------------------------------------------------------------------
# | 1: 1: 1: 0| 0: 1: 1: 0| 1: 1: 0: 1| 0: 1: 1: 1| 0: 1: 1: 1| 0: 0: 0: 0| 0: 0: 0: 0| 0: 1: 0: 1|
# -------------------------------------------------------------------------------------------------
#
# if wback && (n == 15 || n == t) then UNPREDICTABLE
[0x05 0x70 0xd7 0xe6]
# CHECK: potentially undefined instruction encoding
# CHECK-NEXT: [0x05 0x70 0xd7 0xe6]



#------------------------------------------------------------------------------
# Undefined encodings for mcr
#------------------------------------------------------------------------------

# Opcode=171 Name=MCR Format=ARM_FORMAT_BRFRM(2)
#  31 30 29 28 27 26 25 24 23 22 21 20 19 18 17 16 15 14 13 12 11 10  9  8  7  6  5  4  3  2  1  0
# -------------------------------------------------------------------------------------------------
# | 0: 0: 1: 0| 1: 1: 1: 0| 1: 0: 1: 0| 0: 0: 0: 0| 0: 0: 0: 1| 1: 0: 1: 1| 0: 0: 0: 1| 1: 0: 1: 1|
# -------------------------------------------------------------------------------------------------
#
# Encoding error: coproc == 10 or 11 for MCR[R]/MR[R]C

[0x1b 0x1b 0xa0 0x2e]
# CHECK: invalid instruction encoding
# CHECK-NEXT: [0x1b 0x1b 0xa0 0x2e]


#------------------------------------------------------------------------------
# Undefined encodings for mov/lsl
#------------------------------------------------------------------------------

# Opcode=0 Name=PHI Format=(42)
#  31 30 29 28 27 26 25 24 23 22 21 20 19 18 17 16 15 14 13 12 11 10  9  8  7  6  5  4  3  2  1  0
# -------------------------------------------------------------------------------------------------
# | 1: 1: 1: 1| 0: 0: 0: 1| 1: 0: 1: 1| 1: 1: 0: 0| 1: 1: 0: 1| 0: 0: 0: 1| 0: 0: 0: 0| 0: 0: 1: 0|
# -------------------------------------------------------------------------------------------------
# To qualify as an LSL (immediate) instruction, Inst{19-16} "should" be 0b0000, instead it is = 0b1100.
# The instruction is UNPREDICTABLE, and is not a valid instruction.
#
# See also
# A8.6.88 LSL (immediate)
# A8.6.98 MOV (shifted register), and
# I.1 Instruction encoding diagrams and pseudocode

[0x2 0xd1 0xbc 0xf1]
# CHECK: invalid instruction encoding
# CHECK-NEXT: [0x2 0xd1 0xbc 0xf1]


# Opcode=0 Name=PHI Format=(42)
#  31 30 29 28 27 26 25 24 23 22 21 20 19 18 17 16 15 14 13 12 11 10  9  8  7  6  5  4  3  2  1  0
# -------------------------------------------------------------------------------------------------
# | 1: 1: 1: 1| 0: 0: 0: 1| 1: 0: 1: 1| 1: 1: 0: 0| 1: 1: 0: 1| 0: 0: 0: 0| 0: 0: 0: 0| 0: 0: 1: 0|
# -------------------------------------------------------------------------------------------------
# To qualify as a MOV (register) instruction, Inst{19-16} "should" be 0b0000, instead it is = 0b1100.
# The instruction is UNPREDICTABLE, and is not a valid instruction.
#
# See also
# A8.6.97 MOV (register)

[0x2 0xd0 0xbc 0xf1]
# CHECK: invalid instruction encoding
# CHECK-NEXT: [0x2 0xd0 0xbc 0xf1]

# Opcode=196 Name=MOVs Format=ARM_FORMAT_DPSOREGFRM(5)
#  31 30 29 28 27 26 25 24 23 22 21 20 19 18 17 16 15 14 13 12 11 10  9  8  7  6  5  4  3  2  1  0
# -------------------------------------------------------------------------------------------------
# | 1: 1: 0: 1| 0: 0: 0: 1| 1: 0: 1: 0| 0: 0: 0: 0| 0: 1: 0: 0| 0: 0: 1: 0| 1: 0: 0: 1| 0: 0: 1: 1|
# -------------------------------------------------------------------------------------------------
# A8.6.89 LSL (register): Inst{7-4} = 0b0001
[0x93 0x42 0xa0 0xd1]
# CHECK: invalid instruction encoding
# CHECK-NEXT: [0x93 0x42 0xa0 0xd1]

# Opcode=185 Name=MOVTi16 Format=ARM_FORMAT_DPFRM(4)
#  31 30 29 28 27 26 25 24 23 22 21 20 19 18 17 16 15 14 13 12 11 10  9  8  7  6  5  4  3  2  1  0
# -------------------------------------------------------------------------------------------------
# | 1: 1: 1: 0| 0: 0: 1: 1| 0: 1: 0: 0| 0: 0: 0: 1| 1: 1: 1: 1| 0: 0: 0: 0| 0: 0: 0: 0| 0: 0: 0: 0|
# -------------------------------------------------------------------------------------------------
#
# if d == 15 then UNPREDICTABLE
[0x00 0xf0 0x41 0xe3]
# CHECK: potentially undefined instruction encoding
# CHECK-NEXT: [0x00 0xf0 0x41 0xe3]


#------------------------------------------------------------------------------
# Undefined encodings for mrrc2
#------------------------------------------------------------------------------

[0x00 0x1a 0x50 0xfc]
# CHECK: invalid instruction encoding
# CHECK-NEXT: [0x00 0x1a 0x50 0xfc]


#------------------------------------------------------------------------------
# Undefined encodings for msr (imm)
#------------------------------------------------------------------------------

# Opcode=206 Name=MSRi Format=ARM_FORMAT_BRFRM(2)
#  31 30 29 28 27 26 25 24 23 22 21 20 19 18 17 16 15 14 13 12 11 10  9  8  7  6  5  4  3  2  1  0
# -------------------------------------------------------------------------------------------------
# | 0: 0: 0: 0| 0: 0: 1: 1| 0: 0: 1: 0| 0: 0: 0: 0| 1: 1: 1: 1| 0: 0: 0: 1| 1: 0: 1: 0| 0: 1: 1: 1|
# -------------------------------------------------------------------------------------------------
#
# A5.2.11 MSR (immediate), and hints & B6.1.6 MSR (immediate)
# The hints instructions have more specific encodings, so if mask == 0,
# we should reject this as an invalid instruction.

[0xa7 0xf1 0x20 0x3]
# CHECK: invalid instruction encoding
# CHECK-NEXT: [0xa7 0xf1 0x20 0x3]


#------------------------------------------------------------------------------
# Undefined encodings for sbfx
#------------------------------------------------------------------------------

# Opcode=271 Name=SBFX Format=ARM_FORMAT_DPFRM(4)
#  31 30 29 28 27 26 25 24 23 22 21 20 19 18 17 16 15 14 13 12 11 10  9  8  7  6  5  4  3  2  1  0
# -------------------------------------------------------------------------------------------------
# | 1: 1: 1: 0| 0: 1: 1: 1| 1: 0: 1: 0| 0: 1: 1: 1| 0: 1: 0: 1| 0: 1: 0: 0| 0: 1: 0: 1| 1: 1: 1: 1|
# -------------------------------------------------------------------------------------------------
#
# if d == 15 || n == 15 then UNPREDICTABLE;

[0x5f 0x54 0xa7 0xe7]
# CHECK: potentially undefined instruction encoding
# CHECK-NEXT: [0x5f 0x54 0xa7 0xe7]

#------------------------------------------------------------------------------
# Undefined encodings for smlad
#------------------------------------------------------------------------------

# Opcode=284 Name=SMLAD Format=ARM_FORMAT_MULFRM(1)
#  31 30 29 28 27 26 25 24 23 22 21 20 19 18 17 16 15 14 13 12 11 10  9  8  7  6  5  4  3  2  1  0
# -------------------------------------------------------------------------------------------------
# | 1: 0: 0: 1| 0: 1: 1: 1| 0: 0: 0: 0| 1: 1: 1: 1| 0: 1: 1: 0| 1: 0: 0: 0| 0: 0: 0: 1| 1: 0: 1: 1|
# -------------------------------------------------------------------------------------------------
#
# A8.6.167
# if d == 15 || n == 15 | m == 15 then UNPREDICTABLE

[0x1b 0x68 0xf 0x97]
# CHECK: potentially undefined instruction encoding
# CHECK-NEXT: [0x1b 0x68 0xf 0x97]


#------------------------------------------------------------------------------
# Undefined encodings for srs
#------------------------------------------------------------------------------

# Opcode=0 Name=PHI Format=(42)
#  31 30 29 28 27 26 25 24 23 22 21 20 19 18 17 16 15 14 13 12 11 10  9  8  7  6  5  4  3  2  1  0
# -------------------------------------------------------------------------------------------------
# | 1: 1: 1: 1| 1: 0: 0: 0| 1: 1: 0: 0| 0: 1: 0: 1| 0: 0: 0: 1| 1: 1: 0: 0| 1: 0: 0: 0| 0: 0: 1: 1|
# -------------------------------------------------------------------------------------------------
# Unknown format
#
# B6.1.10 SRS
# Inst{19-8} = 0xd05
# Inst{7-5} = 0b000

[0x83 0x1c 0xc5 0xf8]
# CHECK: invalid instruction encoding
# CHECK-NEXT: [0x83 0x1c 0xc5 0xf8]

[0x00 0x00 0x20 0xf8]
# CHECK: invalid instruction encoding
# CHECK-NEXT: [0x00 0x00 0x20 0xf8]

[0xff 0xff 0xaf 0xf8]
# CHECK: invalid instruction encoding
# CHECK-NEXT: [0xff 0xff 0xaf 0xf8]

[0x13 0x00 0xa0 0xf8]
# CHECK: invalid instruction encoding
# CHECK-NEXT: [0x13 0x00 0xa0 0xf8]

#------------------------------------------------------------------------------
# Undefined encodings for sxtb
#------------------------------------------------------------------------------

# Opcode=390 Name=SXTBr_rot Format=ARM_FORMAT_EXTFRM(14)
#  31 30 29 28 27 26 25 24 23 22 21 20 19 18 17 16 15 14 13 12 11 10  9  8  7  6  5  4  3  2  1  0
# -------------------------------------------------------------------------------------------------
# | 1: 1: 1: 0| 0: 1: 1: 0| 1: 0: 1: 0| 1: 1: 1: 1| 1: 1: 1: 1| 0: 1: 0: 0| 0: 1: 1: 1| 0: 1: 0: 1|
# -------------------------------------------------------------------------------------------------
#
# A8.6.223 SXTB
# if d == 15 || m == 15 then UNPREDICTABLE;

[0x75 0xf4 0xaf 0xe6]
# CHECK: potentially undefined instruction encoding
# CHECK-NEXT: [0x75 0xf4 0xaf 0xe6]

#------------------------------------------------------------------------------
# Undefined encodings for NEON umaal
#------------------------------------------------------------------------------

# Opcode=419 Name=UMAAL Format=ARM_FORMAT_MULFRM(1)
#  31 30 29 28 27 26 25 24 23 22 21 20 19 18 17 16 15 14 13 12 11 10  9  8  7  6  5  4  3  2  1  0
# -------------------------------------------------------------------------------------------------
# | 1: 1: 1: 1| 0: 0: 0: 0| 0: 1: 0: 0| 1: 1: 1: 1| 1: 0: 1: 1| 1: 1: 1: 1| 1: 0: 0: 1| 1: 0: 0: 0|
# -------------------------------------------------------------------------------------------------
#
# A8.6.244 UMAAL
# if dLo == 15 || dHi == 15 || n == 15 || m == 15 then UNPREDICTABLE;
[0x98 0xbf 0x4f 0xf0]
# CHECK: invalid instruction encoding
# CHECK-NEXT: [0x98 0xbf 0x4f 0xf0]

#------------------------------------------------------------------------------
# Undefined encodings for NEON vcvt (float <-> fixed)
#------------------------------------------------------------------------------

# imm6=0b0xxxxx -> UNDEFINED
[0x1e 0xcf 0x92 0xf3]
# CHECK: invalid instruction encoding
# CHECK-NEXT: [0x1e 0xcf 0x92 0xf3]

[0x3e 0xcf 0x92 0xf3]
# CHECK: invalid instruction encoding
# CHECK-NEXT: [0x3e 0xcf 0x92 0xf3]


#------------------------------------------------------------------------------
# Undefined encodings for NEON vext
#------------------------------------------------------------------------------

# invalid imm4 value (0b1xxx)
# A8.8.316: if Q == '0' && imm4<3> == '1' then UNDEFINED;
[0x8f 0xf9 0xf7 0xf2]
# CHECK: invalid instruction encoding
# CHECK-NEXT: [0x8f 0xf9 0xf7 0xf2]

#------------------------------------------------------------------------------
# Undefined encodings for NEON vldmsdb
#------------------------------------------------------------------------------

# core registers out of range
[0xa5 0xba 0x72 0xed]
# CHECK: potentially undefined instruction encoding
# CHECK-NEXT: [0xa5 0xba 0x72 0xed]


#------------------------------------------------------------------------------
# Undefined encodings for NEON vmov
#------------------------------------------------------------------------------

# VMOV cmode=0b1111 op=1 is UNDEFINED
[0x70 0xef 0xc7 0xf3]
# CHECK: invalid instruction encoding
# CHECK-NEXT: [0x70 0xef 0xc7 0xf3]

#  VMOV cmode=0b1111 op=1 is UNDEFINED
[0x30 0x0f 0x80 0xf3]
# CHECK: invalid instruction encoding
# CHECK-NEXT: [0x30 0x0f 0x80 0xf3]


#------------------------------------------------------------------------------
# Undefined encodings for NEON vqadd
#------------------------------------------------------------------------------

# Opcode=1225 Name=VQADDsv16i8 Format=ARM_FORMAT_N3Reg(37)
#  31 30 29 28 27 26 25 24 23 22 21 20 19 18 17 16 15 14 13 12 11 10  9  8  7  6  5  4  3  2  1  0
# -------------------------------------------------------------------------------------------------
# | 1: 1: 1: 1| 0: 0: 1: 0| 0: 1: 0: 0| 0: 0: 0: 0| 1: 1: 1: 0| 0: 0: 0: 0| 1: 1: 0: 1| 1: 0: 1: 1|
# -------------------------------------------------------------------------------------------------
#
# Qm -> bit[0] == 0, otherwise UNDEFINED
[0xdb 0xe0 0x40 0xf2]
# CHECK: invalid instruction encoding
# CHECK-NEXT: [0xdb 0xe0 0x40 0xf2]


#------------------------------------------------------------------------------
# Undefined encodings for NEON vld/vst
#------------------------------------------------------------------------------

# A8.6.393 VST2 (multiple 2-element structures)
[0xb3 0x09 0x03 0xf4]
# CHECK: invalid instruction encoding
# CHECK-NEXT: [0xb3 0x09 0x03 0xf4]

# size == '11' ==> UNDEFINED
[0xc3 0x08 0x03 0xf4]
# CHECK: invalid instruction encoding
# CHECK-NEXT: [0xc3 0x08 0x03 0xf4]

# type == '1000' and align == '11' ==> UNDEFINED
[0xb3 0x08 0x03 0xf4]
# CHECK: invalid instruction encoding
# CHECK-NEXT: [0xb3 0x08 0x03 0xf4]

# VST1 multi-element, type == 0b0111, align == 0b10 -> undefined
[0xaf 0xb7 0x07 0xf4]
# CHECK: invalid instruction encoding
# CHECK-NEXT: [0xaf 0xb7 0x07 0xf4]

# VST1 multi-element, type == 0b0111, align == 0b11 -> undefined
[0xbf 0xb7 0x07 0xf4]
# CHECK: invalid instruction encoding
# CHECK-NEXT: [0xbf 0xb7 0x07 0xf4]

# VST1 multi-element, type == 0b1010, align == 0b11 -> undefined
[0xbf 0x8a 0x03 0xf4]
# CHECK: invalid instruction encoding
# CHECK-NEXT: [0xbf 0x8a 0x03 0xf4]

# VST1 multi-element, type == 0b0110, align == 0b10 -> undefined
[0xaf 0xb6 0x07 0xf4]
# CHECK: invalid instruction encoding
# CHECK-NEXT: [0xaf 0xb6 0x07 0xf4]

# VST1 multi-element, type == 0b0110, align == 0b11 -> undefined
[0xbf 0xb6 0x07 0xf4]
# CHECK: invalid instruction encoding
# CHECK-NEXT: [0xbf 0xb6 0x07 0xf4]

# VST2 multi-element, type == 0b0100, align == 0b11 -> undefined
[0x4f 0xa8 0x07 0xf7]
# CHECK: invalid instruction encoding
# CHECK-NEXT: [0x4f 0xa8 0x07 0xf7]

# VST2 multi-element, type == 0b0100, align == 0b11 -> undefined
[0x4f 0xa9 0x07 0xf7]
# CHECK: invalid instruction encoding
# CHECK-NEXT: [0x4f 0xa9 0x07 0xf7]

# VST3 multi-element, size = 0b11 -> undefined
[0xbf 0xa4 0x0b 0xf4]
# CHECK: invalid instruction encoding
# CHECK-NEXT: [0xbf 0xa4 0x0b 0xf4]

# VST3 multi-element, align = 0b10 -> undefined
[0x6f 0xa4 0x0b 0xf4]
# CHECK: invalid instruction encoding
# CHECK-NEXT: [0x6f 0xa4 0x0b 0xf4]

# VST3 multi-element, align = 0b11 -> undefined
[0x7f 0xa4 0x0b 0xf4]
# CHECK: invalid instruction encoding
# CHECK-NEXT: [0x7f 0xa4 0x0b 0xf4]

# VST4 multi-element, size = 0b11 -> undefined
[0xcf 0x50 0x03 0xf4]
# CHECK: invalid instruction encoding
# CHECK-NEXT: [0xcf 0x50 0x03 0xf4]


# Opcode=737 Name=VLD1DUPq8_UPD Format=ARM_FORMAT_NLdSt(30)
#  31 30 29 28 27 26 25 24 23 22 21 20 19 18 17 16 15 14 13 12 11 10  9  8  7  6  5  4  3  2  1  0
# -------------------------------------------------------------------------------------------------
# | 1: 1: 1: 1| 0: 1: 0: 0| 1: 0: 1: 0| 0: 0: 0: 0| 0: 0: 1: 1| 1: 1: 0: 0| 0: 0: 1: 1| 1: 1: 0: 1|
# -------------------------------------------------------------------------------------------------
#
# 'a' == 1 and data_size == 8 is invalid
[0x3d 0x3c 0xa0 0xf4]
# CHECK: invalid instruction encoding
# CHECK-NEXT: [0x3d 0x3c 0xa0 0xf4]