3608c2419c
Many Hexagon python scripts call hex_common.get_tagregs(), but only one call site use the full reg structure given by this function. To make the code cleaner, let's make get_tagregs() filter out the unused fields (i.e. 'toss' and 'numregs'), properly removed the unused variables at the call sites. The hex_common.bad_register() function is also adjusted to work exclusively with 'regtype' and 'regid' args. For the single call site that does use toss/numregs, we provide an optional parameter to get_tagregs() which will restore the old full behavior. Suggested-by: Taylor Simpson <tsimpson@quicinc.com> Signed-off-by: Matheus Tavares Bernardino <quic_mathbern@quicinc.com> Reviewed-by: Taylor Simpson <tsimpson@quicinc.com> Tested-by: Taylor Simpson <tsimpson@quicinc.com> Signed-off-by: Taylor Simpson <tsimpson@quicinc.com> Message-Id: <3ffd4ccb972879f57f499705c624e8eaba7f8b52.1684939078.git.quic_mathbern@quicinc.com>
228 lines
7.5 KiB
Python
Executable File
228 lines
7.5 KiB
Python
Executable File
#!/usr/bin/env python3
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##
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## Copyright(c) 2019-2023 Qualcomm Innovation Center, Inc. All Rights Reserved.
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##
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## This program is free software; you can redistribute it and/or modify
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## it under the terms of the GNU General Public License as published by
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## the Free Software Foundation; either version 2 of the License, or
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## (at your option) any later version.
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##
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## This program is distributed in the hope that it will be useful,
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## but WITHOUT ANY WARRANTY; without even the implied warranty of
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## MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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## GNU General Public License for more details.
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##
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## You should have received a copy of the GNU General Public License
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## along with this program; if not, see <http://www.gnu.org/licenses/>.
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##
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import sys
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import re
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import string
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import hex_common
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##
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## Helpers for gen_helper_prototype
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##
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def_helper_types = {
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"N": "s32",
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"O": "s32",
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"P": "s32",
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"M": "s32",
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"C": "s32",
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"R": "s32",
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"V": "ptr",
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"Q": "ptr",
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}
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def_helper_types_pair = {
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"R": "s64",
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"C": "s64",
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"S": "s64",
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"G": "s64",
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"V": "ptr",
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"Q": "ptr",
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}
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def gen_def_helper_opn(f, tag, regtype, regid, i):
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if hex_common.is_pair(regid):
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f.write(f", {def_helper_types_pair[regtype]}")
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elif hex_common.is_single(regid):
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f.write(f", {def_helper_types[regtype]}")
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else:
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hex_common.bad_register(regtype, regid)
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##
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## Generate the DEF_HELPER prototype for an instruction
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## For A2_add: Rd32=add(Rs32,Rt32)
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## We produce:
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## DEF_HELPER_3(A2_add, s32, env, s32, s32)
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##
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def gen_helper_prototype(f, tag, tagregs, tagimms):
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regs = tagregs[tag]
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imms = tagimms[tag]
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numresults = 0
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numscalarresults = 0
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numscalarreadwrite = 0
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for regtype, regid in regs:
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if hex_common.is_written(regid):
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numresults += 1
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if hex_common.is_scalar_reg(regtype):
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numscalarresults += 1
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if hex_common.is_readwrite(regid):
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if hex_common.is_scalar_reg(regtype):
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numscalarreadwrite += 1
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if numscalarresults > 1:
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## The helper is bogus when there is more than one result
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f.write(f"DEF_HELPER_1({tag}, void, env)\n")
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else:
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## Figure out how many arguments the helper will take
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if numscalarresults == 0:
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def_helper_size = len(regs) + len(imms) + numscalarreadwrite + 1
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if hex_common.need_pkt_has_multi_cof(tag):
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def_helper_size += 1
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if hex_common.need_pkt_need_commit(tag):
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def_helper_size += 1
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if hex_common.need_part1(tag):
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def_helper_size += 1
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if hex_common.need_slot(tag):
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def_helper_size += 1
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if hex_common.need_PC(tag):
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def_helper_size += 1
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if hex_common.helper_needs_next_PC(tag):
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def_helper_size += 1
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if hex_common.need_condexec_reg(tag, regs):
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def_helper_size += 1
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f.write(f"DEF_HELPER_{def_helper_size}({tag}")
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## The return type is void
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f.write(", void")
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else:
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def_helper_size = len(regs) + len(imms) + numscalarreadwrite
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if hex_common.need_pkt_has_multi_cof(tag):
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def_helper_size += 1
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if hex_common.need_pkt_need_commit(tag):
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def_helper_size += 1
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if hex_common.need_part1(tag):
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def_helper_size += 1
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if hex_common.need_slot(tag):
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def_helper_size += 1
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if hex_common.need_PC(tag):
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def_helper_size += 1
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if hex_common.need_condexec_reg(tag, regs):
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def_helper_size += 1
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if hex_common.helper_needs_next_PC(tag):
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def_helper_size += 1
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f.write(f"DEF_HELPER_{def_helper_size}({tag}")
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## Generate the qemu DEF_HELPER type for each result
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## Iterate over this list twice
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## - Emit the scalar result
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## - Emit the vector result
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i = 0
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for regtype, regid in regs:
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if hex_common.is_written(regid):
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if not hex_common.is_hvx_reg(regtype):
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gen_def_helper_opn(f, tag, regtype, regid, i)
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i += 1
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## Put the env between the outputs and inputs
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f.write(", env")
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i += 1
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# Second pass
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for regtype, regid in regs:
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if hex_common.is_written(regid):
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if hex_common.is_hvx_reg(regtype):
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gen_def_helper_opn(f, tag, regtype, regid, i)
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i += 1
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## For conditional instructions, we pass in the destination register
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if "A_CONDEXEC" in hex_common.attribdict[tag]:
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for regtype, regid in regs:
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if hex_common.is_writeonly(regid) and not hex_common.is_hvx_reg(
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regtype
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):
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gen_def_helper_opn(f, tag, regtype, regid, i)
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i += 1
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## Generate the qemu type for each input operand (regs and immediates)
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for regtype, regid in regs:
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if hex_common.is_read(regid):
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if hex_common.is_hvx_reg(regtype) and hex_common.is_readwrite(regid):
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continue
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gen_def_helper_opn(f, tag, regtype, regid, i)
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i += 1
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for immlett, bits, immshift in imms:
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f.write(", s32")
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## Add the arguments for the instruction pkt_has_multi_cof,
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## pkt_needs_commit, PC, next_PC, slot, and part1 (if needed)
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if hex_common.need_pkt_has_multi_cof(tag):
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f.write(", i32")
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if hex_common.need_pkt_need_commit(tag):
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f.write(', i32')
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if hex_common.need_PC(tag):
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f.write(", i32")
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if hex_common.helper_needs_next_PC(tag):
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f.write(", i32")
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if hex_common.need_slot(tag):
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f.write(", i32")
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if hex_common.need_part1(tag):
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f.write(" , i32")
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f.write(")\n")
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def main():
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hex_common.read_semantics_file(sys.argv[1])
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hex_common.read_attribs_file(sys.argv[2])
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hex_common.read_overrides_file(sys.argv[3])
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hex_common.read_overrides_file(sys.argv[4])
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## Whether or not idef-parser is enabled is
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## determined by the number of arguments to
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## this script:
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##
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## 5 args. -> not enabled,
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## 6 args. -> idef-parser enabled.
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##
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## The 6:th arg. then holds a list of the successfully
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## parsed instructions.
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is_idef_parser_enabled = len(sys.argv) > 6
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if is_idef_parser_enabled:
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hex_common.read_idef_parser_enabled_file(sys.argv[5])
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hex_common.calculate_attribs()
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tagregs = hex_common.get_tagregs()
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tagimms = hex_common.get_tagimms()
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output_file = sys.argv[-1]
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with open(output_file, "w") as f:
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for tag in hex_common.tags:
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## Skip the priv instructions
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if "A_PRIV" in hex_common.attribdict[tag]:
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continue
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## Skip the guest instructions
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if "A_GUEST" in hex_common.attribdict[tag]:
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continue
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## Skip the diag instructions
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if tag == "Y6_diag":
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continue
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if tag == "Y6_diag0":
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continue
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if tag == "Y6_diag1":
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continue
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if hex_common.skip_qemu_helper(tag):
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continue
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if hex_common.is_idef_parser_enabled(tag):
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continue
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gen_helper_prototype(f, tag, tagregs, tagimms)
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if __name__ == "__main__":
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main()
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