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#!/usr/bin/env python3
##
## Copyright(c) 2019-2023 Qualcomm Innovation Center, Inc. All Rights Reserved.
##
## This program is free software; you can redistribute it and/or modify
## it under the terms of the GNU General Public License as published by
## the Free Software Foundation; either version 2 of the License, or
## (at your option) any later version.
##
## This program 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 General Public License for more details.
##
## You should have received a copy of the GNU General Public License
## along with this program; if not, see <http://www.gnu.org/licenses/>.
##
import sys
import re
import string
import hex_common
##
## Generate the TCG code to call the helper
## For A2_add: Rd32=add(Rs32,Rt32), { RdV=RsV+RtV;}
## We produce:
## int32_t HELPER(A2_add)(CPUHexagonState *env, int32_t RsV, int32_t RtV)
## {
## int32_t RdV = 0;
## { RdV=RsV+RtV;}
## return RdV;
## }
##
def gen_helper_function(f, tag, tagregs, tagimms):
regs = tagregs[tag]
imms = tagimms[tag]
ret_type = hex_common.helper_ret_type(tag, regs).func_arg
declared = []
for arg in hex_common.helper_args(tag, regs, imms):
declared.append(arg.func_arg)
arguments = ", ".join(declared)
f.write(f"{ret_type} HELPER({tag})({arguments})\n")
f.write("{\n")
if hex_common.need_ea(tag):
f.write(hex_common.code_fmt(f"""\
uint32_t EA;
"""))
## Declare the return variable
if not hex_common.is_predicated(tag):
for regtype, regid in regs:
reg = hex_common.get_register(tag, regtype, regid)
if reg.is_writeonly() and not reg.is_hvx_reg():
f.write(hex_common.code_fmt(f"""\
{reg.helper_arg_type()} {reg.helper_arg_name()} = 0;
"""))
## Print useful information about HVX registers
for regtype, regid in regs:
reg = hex_common.get_register(tag, regtype, regid)
if reg.is_hvx_reg():
reg.helper_hvx_desc(f)
if hex_common.need_slot(tag):
if "A_LOAD" in hex_common.attribdict[tag]:
f.write(hex_common.code_fmt(f"""\
bool pkt_has_store_s1 = slotval & 0x1;
"""))
f.write(hex_common.code_fmt(f"""\
uint32_t slot = slotval >> 1;
"""))
if "A_FPOP" in hex_common.attribdict[tag]:
f.write(hex_common.code_fmt(f"""\
arch_fpop_start(env);
"""))
f.write(hex_common.code_fmt(f"""\
{hex_common.semdict[tag]}
"""))
if "A_FPOP" in hex_common.attribdict[tag]:
f.write(hex_common.code_fmt(f"""\
arch_fpop_end(env);
"""))
## Return the scalar result
for regtype, regid in regs:
reg = hex_common.get_register(tag, regtype, regid)
if reg.is_written() and not reg.is_hvx_reg():
f.write(hex_common.code_fmt(f"""\
return {reg.helper_arg_name()};
"""))
f.write("}\n\n")
## End of the helper definition
def main():
hex_common.read_semantics_file(sys.argv[1])
hex_common.read_attribs_file(sys.argv[2])
hex_common.read_overrides_file(sys.argv[3])
hex_common.read_overrides_file(sys.argv[4])
## Whether or not idef-parser is enabled is
## determined by the number of arguments to
## this script:
##
## 5 args. -> not enabled,
## 6 args. -> idef-parser enabled.
##
## The 6:th arg. then holds a list of the successfully
## parsed instructions.
is_idef_parser_enabled = len(sys.argv) > 6
if is_idef_parser_enabled:
hex_common.read_idef_parser_enabled_file(sys.argv[5])
hex_common.calculate_attribs()
hex_common.init_registers()
tagregs = hex_common.get_tagregs()
tagimms = hex_common.get_tagimms()
output_file = sys.argv[-1]
with open(output_file, "w") as f:
for tag in hex_common.tags:
## Skip the priv instructions
if "A_PRIV" in hex_common.attribdict[tag]:
continue
## Skip the guest instructions
if "A_GUEST" in hex_common.attribdict[tag]:
continue
## Skip the diag instructions
if tag == "Y6_diag":
continue
if tag == "Y6_diag0":
continue
if tag == "Y6_diag1":
continue
if hex_common.skip_qemu_helper(tag):
continue
if hex_common.is_idef_parser_enabled(tag):
continue
gen_helper_function(f, tag, tagregs, tagimms)
if __name__ == "__main__":
main()
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