Also manage word and byte operands and fix the computation of
overflow in the case of M68000 arithmetic shifts.
Backports commit 367790cce8e14131426f5190dfd7d1bdbf656e4d from qemu
Report this properly via exception and, importantly, allow
the disassembler the chance to tell us what insn is not handled.
Backports commit 72d2e4b6a437f11f97d3138f6b2ec177b78210c7 from qemu
680x0 movem can load/store words and long words and can use more
addressing modes. Coldfire can only use long words with (Ax) and
(d16,Ax) addressing modes.
Backports commit 7b542eb96d7d5d9266a9c0425f05d49c8e6df2f9 from qemu
Implement CAS using cmpxchg.
Implement CAS2 using helper and either cmpxchg when
the 32bit addresses are consecutive, or with
parallel_cpus+cpu_loop_exit_atomic() otherwise.
Backports commit 14f944063affbcc7bd6df42b060793dbfee8a822 from qemu
Update helper to set the throwing location in case of div-by-0.
Cleanup divX.w and add quad word variants of divX.l.
Backports commit 0ccb9c1d8128a020720d5c6abf99a470742a1b94 from qemu
Provide gen_lea_mode and gen_ea_mode, where the mode can be
specified manually, rather than taken from the instruction.
Backports commit f84aab269ddab8509b77408b886e9071bf5c48fb from qemu
"The multiplier and multiplicand are both word operands, and the result
is a long-word operand."
So compute flags on a long-word result, not on a word result.
Backports commit 4a18cd44f3c905d443c26e26bb9b09932606d1a3 from qemu
"The size of the operation can be specified as word or long.
Word length source operands are sign-extended to 32 bits for
comparison."
So comparison is always done using OS_LONG.
Backports commit 5436c29d78957a6825a93f0eb79dfab388641017 from qemu
Separate all ccr bits. Continue to batch updates via cc_op.
Signed-off-by: Richard Henderson <rth@twiddle.net>
Fix gen_logic_cc() to really extend the size of the result.
Fix gen_get_ccr(): update cc_op as it is used by the helper.
Factorize flags computing and src/ccr cleanup
Backports commit 620c6cf66584bfbee90db84a7e87a6eabf230ca9 from qemu
Update cc_op directly from tcg_gen_insn_start() and
restore_state_to_opc()
Copied from target-i386
Backports commit 20a8856eba0980fbe9d2b8ed2b33ecdb9c9fe5ad from qemu
Read a 8, 16 or 32bit immediat constant.
An immediate constant is stored in the instruction opcode and
can be in one or two extension words.
Backports commit 28b68cd79ef01e8b1f5bd26718cd8c09a12c625f from qemu
Scaled index is not supported by 68000, 68008, and 68010.
EA = (bd + PC) + Xn.SIZE*SCALE + od
Ignore it:
M68000 FAMILY PROGRAMMER’S REFERENCE MANUAL
2.4 BRIEF EXTENSION WORD FORMAT COMPATIBILITY
"If the MC68000 were to execute an instruction that
encoded a scaling factor, the scaling factor would be
ignored and would not access the desired memory address.
The earlier microprocessors do not recognize the brief
extension word formats implemented by newer processors.
Although they can detect illegal instructions, they do not
decode invalid encodings of the brief extension word formats
as exceptions."
Backports commit d8633620a112296fcf6a6ae9a1cbba614c0ca502 from qemu
