xemu/target/hexagon/gen_op_regs.py

#!/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

##
##     Generate the register and immediate operands for each instruction
##
def calculate_regid_reg(tag):
    def letter_inc(x): return chr(ord(x)+1)
    ordered_implregs = [ 'SP','FP','LR' ]
    srcdst_lett = 'X'
    src_lett = 'S'
    dst_lett = 'D'
    retstr = ""
    mapdict = {}
    for reg in ordered_implregs:
        reg_rd = 0
        reg_wr = 0
        if ('A_IMPLICIT_WRITES_'+reg) in hex_common.attribdict[tag]: reg_wr = 1
        if reg_rd and reg_wr:
            retstr += srcdst_lett
            mapdict[srcdst_lett] = reg
            srcdst_lett = letter_inc(srcdst_lett)
        elif reg_rd:
            retstr += src_lett
            mapdict[src_lett] = reg
            src_lett = letter_inc(src_lett)
        elif reg_wr:
            retstr += dst_lett
            mapdict[dst_lett] = reg
            dst_lett = letter_inc(dst_lett)
    return retstr,mapdict

def calculate_regid_letters(tag):
    retstr,mapdict = calculate_regid_reg(tag)
    return retstr

def strip_reg_prefix(x):
    y=x.replace('UREG.','')
    y=y.replace('MREG.','')
    return y.replace('GREG.','')

def main():
    hex_common.read_semantics_file(sys.argv[1])
    hex_common.read_attribs_file(sys.argv[2])
    tagregs = hex_common.get_tagregs()
    tagimms = hex_common.get_tagimms()

    with open(sys.argv[3], 'w') as f:
        for tag in hex_common.tags:
            regs = tagregs[tag]
            rregs = []
            wregs = []
            regids = ""
            for regtype,regid,toss,numregs in regs:
                if hex_common.is_read(regid):
                    if regid[0] not in regids: regids += regid[0]
                    rregs.append(regtype+regid+numregs)
                if hex_common.is_written(regid):
                    wregs.append(regtype+regid+numregs)
                    if regid[0] not in regids: regids += regid[0]
            for attrib in hex_common.attribdict[tag]:
                if hex_common.attribinfo[attrib]['rreg']:
                    rregs.append(strip_reg_prefix(attribinfo[attrib]['rreg']))
                if hex_common.attribinfo[attrib]['wreg']:
                    wregs.append(strip_reg_prefix(attribinfo[attrib]['wreg']))
            regids += calculate_regid_letters(tag)
            f.write('REGINFO(%s,"%s",\t/*RD:*/\t"%s",\t/*WR:*/\t"%s")\n' % \
                (tag,regids,",".join(rregs),",".join(wregs)))

        for tag in hex_common.tags:
            imms = tagimms[tag]
            f.write( 'IMMINFO(%s' % tag)
            if not imms:
                f.write(''','u',0,0,'U',0,0''')
            for sign,size,shamt in imms:
                if sign == 'r': sign = 's'
                if not shamt:
                    shamt = "0"
                f.write(''','%s',%s,%s''' % (sign,size,shamt))
            if len(imms) == 1:
                if sign.isupper():
                    myu = 'u'
                else:
                    myu = 'U'
                f.write(''','%s',0,0''' % myu)
            f.write(')\n')

if __name__ == "__main__":
    main()