#!/usr/bin/env python3
##
## Copyright(c) 2019-2021 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
##
## Helpers for gen_helper_function
##
def gen_decl_ea(f):
f.write(" uint32_t EA;\n")
def gen_helper_return_type(f,regtype,regid,regno):
if regno > 1 : f.write(", ")
f.write("int32_t")
def gen_helper_return_type_pair(f,regtype,regid,regno):
if regno > 1 : f.write(", ")
f.write("int64_t")
def gen_helper_arg(f,regtype,regid,regno):
if regno > 0 : f.write(", " )
f.write("int32_t %s%sV" % (regtype,regid))
def gen_helper_arg_new(f,regtype,regid,regno):
if regno >= 0 : f.write(", " )
f.write("int32_t %s%sN" % (regtype,regid))
def gen_helper_arg_pair(f,regtype,regid,regno):
if regno >= 0 : f.write(", ")
f.write("int64_t %s%sV" % (regtype,regid))
def gen_helper_arg_opn(f,regtype,regid,i,tag):
if (hex_common.is_pair(regid)):
gen_helper_arg_pair(f,regtype,regid,i)
elif (hex_common.is_single(regid)):
if hex_common.is_old_val(regtype, regid, tag):
gen_helper_arg(f,regtype,regid,i)
elif hex_common.is_new_val(regtype, regid, tag):
gen_helper_arg_new(f,regtype,regid,i)
else:
print("Bad register parse: ",regtype,regid,toss,numregs)
else:
print("Bad register parse: ",regtype,regid,toss,numregs)
def gen_helper_arg_imm(f,immlett):
f.write(", int32_t %s" % (hex_common.imm_name(immlett)))
def gen_helper_dest_decl(f,regtype,regid,regno,subfield=""):
f.write(" int32_t %s%sV%s = 0;\n" % \
(regtype,regid,subfield))
def gen_helper_dest_decl_pair(f,regtype,regid,regno,subfield=""):
f.write(" int64_t %s%sV%s = 0;\n" % \
(regtype,regid,subfield))
def gen_helper_dest_decl_opn(f,regtype,regid,i):
if (hex_common.is_pair(regid)):
gen_helper_dest_decl_pair(f,regtype,regid,i)
elif (hex_common.is_single(regid)):
gen_helper_dest_decl(f,regtype,regid,i)
else:
print("Bad register parse: ",regtype,regid,toss,numregs)
def gen_helper_return(f,regtype,regid,regno):
f.write(" return %s%sV;\n" % (regtype,regid))
def gen_helper_return_pair(f,regtype,regid,regno):
f.write(" return %s%sV;\n" % (regtype,regid))
def gen_helper_return_opn(f, regtype, regid, i):
if (hex_common.is_pair(regid)):
gen_helper_return_pair(f,regtype,regid,i)
elif (hex_common.is_single(regid)):
gen_helper_return(f,regtype,regid,i)
else:
print("Bad register parse: ",regtype,regid,toss,numregs)
##
## 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)
## {
## uint32_t slot __attribute__(unused)) = 4;
## int32_t RdV = 0;
## { RdV=RsV+RtV;}
## COUNT_HELPER(A2_add);
## return RdV;
## }
##
def gen_helper_function(f, tag, tagregs, tagimms):
regs = tagregs[tag]
imms = tagimms[tag]
numresults = 0
numscalarresults = 0
numscalarreadwrite = 0
for regtype,regid,toss,numregs in regs:
if (hex_common.is_written(regid)):
numresults += 1
if (hex_common.is_scalar_reg(regtype)):
numscalarresults += 1
if (hex_common.is_readwrite(regid)):
if (hex_common.is_scalar_reg(regtype)):
numscalarreadwrite += 1
if (numscalarresults > 1):
## The helper is bogus when there is more than one result
f.write("void HELPER(%s)(CPUHexagonState *env) { BOGUS_HELPER(%s); }\n"
% (tag, tag))
else:
## The return type of the function is the type of the destination
## register
i=0
for regtype,regid,toss,numregs in regs:
if (hex_common.is_written(regid)):
if (hex_common.is_pair(regid)):
gen_helper_return_type_pair(f,regtype,regid,i)
elif (hex_common.is_single(regid)):
gen_helper_return_type(f,regtype,regid,i)
else:
print("Bad register parse: ",regtype,regid,toss,numregs)
i += 1
if (numscalarresults == 0):
f.write("void")
f.write(" HELPER(%s)(CPUHexagonState *env" % tag)
i = 1
## Arguments to the helper function are the source regs and immediates
for regtype,regid,toss,numregs in regs:
if (hex_common.is_read(regid)):
gen_helper_arg_opn(f,regtype,regid,i,tag)
i += 1
for immlett,bits,immshift in imms:
gen_helper_arg_imm(f,immlett)
i += 1
if hex_common.need_slot(tag):
if i > 0: f.write(", ")
f.write("uint32_t slot")
i += 1
if hex_common.need_part1(tag):
if i > 0: f.write(", ")
f.write("uint32_t part1")
f.write(")\n{\n")
if (not hex_common.need_slot(tag)):
f.write(" uint32_t slot __attribute__((unused)) = 4;\n" )
if hex_common.need_ea(tag): gen_decl_ea(f)
## Declare the return variable
i=0
for regtype,regid,toss,numregs in regs:
if (hex_common.is_writeonly(regid)):
gen_helper_dest_decl_opn(f,regtype,regid,i)
i += 1
if 'A_FPOP' in hex_common.attribdict[tag]:
f.write(' arch_fpop_start(env);\n');
f.write(" %s\n" % hex_common.semdict[tag])
if 'A_FPOP' in hex_common.attribdict[tag]:
f.write(' arch_fpop_end(env);\n');
## Save/return the return variable
for regtype,regid,toss,numregs in regs:
if (hex_common.is_written(regid)):
gen_helper_return_opn(f, regtype, regid, i)
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.calculate_attribs()
tagregs = hex_common.get_tagregs()
tagimms = hex_common.get_tagimms()
with open(sys.argv[4], '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
gen_helper_function(f, tag, tagregs, tagimms)
if __name__ == "__main__":
main()
