1#!/usr/bin/env python3 2 3## 4## Copyright(c) 2019-2021 Qualcomm Innovation Center, Inc. All Rights Reserved. 5## 6## This program is free software; you can redistribute it and/or modify 7## it under the terms of the GNU General Public License as published by 8## the Free Software Foundation; either version 2 of the License, or 9## (at your option) any later version. 10## 11## This program is distributed in the hope that it will be useful, 12## but WITHOUT ANY WARRANTY; without even the implied warranty of 13## MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the 14## GNU General Public License for more details. 15## 16## You should have received a copy of the GNU General Public License 17## along with this program; if not, see <http://www.gnu.org/licenses/>. 18## 19 20import sys 21import re 22import string 23 24behdict = {} # tag ->behavior 25semdict = {} # tag -> semantics 26attribdict = {} # tag -> attributes 27macros = {} # macro -> macro information... 28attribinfo = {} # Register information and misc 29tags = [] # list of all tags 30overrides = {} # tags with helper overrides 31 32# We should do this as a hash for performance, 33# but to keep order let's keep it as a list. 34def uniquify(seq): 35 seen = set() 36 seen_add = seen.add 37 return [x for x in seq if x not in seen and not seen_add(x)] 38 39regre = re.compile( 40 r"((?<!DUP)[MNORCPQXSGVZA])([stuvwxyzdefg]+)([.]?[LlHh]?)(\d+S?)") 41immre = re.compile(r"[#]([rRsSuUm])(\d+)(?:[:](\d+))?") 42reg_or_immre = \ 43 re.compile(r"(((?<!DUP)[MNRCOPQXSGVZA])([stuvwxyzdefg]+)" + \ 44 "([.]?[LlHh]?)(\d+S?))|([#]([rRsSuUm])(\d+)[:]?(\d+)?)") 45relimmre = re.compile(r"[#]([rR])(\d+)(?:[:](\d+))?") 46absimmre = re.compile(r"[#]([sSuUm])(\d+)(?:[:](\d+))?") 47 48finished_macros = set() 49 50def expand_macro_attribs(macro,allmac_re): 51 if macro.key not in finished_macros: 52 # Get a list of all things that might be macros 53 l = allmac_re.findall(macro.beh) 54 for submacro in l: 55 if not submacro: continue 56 if not macros[submacro]: 57 raise Exception("Couldn't find macro: <%s>" % l) 58 macro.attribs |= expand_macro_attribs( 59 macros[submacro], allmac_re) 60 finished_macros.add(macro.key) 61 return macro.attribs 62 63# When qemu needs an attribute that isn't in the imported files, 64# we'll add it here. 65def add_qemu_macro_attrib(name, attrib): 66 macros[name].attribs.add(attrib) 67 68immextre = re.compile(r'f(MUST_)?IMMEXT[(]([UuSsRr])') 69def calculate_attribs(): 70 add_qemu_macro_attrib('fREAD_PC', 'A_IMPLICIT_READS_PC') 71 add_qemu_macro_attrib('fTRAP', 'A_IMPLICIT_READS_PC') 72 add_qemu_macro_attrib('fWRITE_P0', 'A_WRITES_PRED_REG') 73 add_qemu_macro_attrib('fWRITE_P1', 'A_WRITES_PRED_REG') 74 add_qemu_macro_attrib('fWRITE_P2', 'A_WRITES_PRED_REG') 75 add_qemu_macro_attrib('fWRITE_P3', 'A_WRITES_PRED_REG') 76 77 # Recurse down macros, find attributes from sub-macros 78 macroValues = list(macros.values()) 79 allmacros_restr = "|".join(set([ m.re.pattern for m in macroValues ])) 80 allmacros_re = re.compile(allmacros_restr) 81 for macro in macroValues: 82 expand_macro_attribs(macro,allmacros_re) 83 # Append attributes to all instructions 84 for tag in tags: 85 for macname in allmacros_re.findall(semdict[tag]): 86 if not macname: continue 87 macro = macros[macname] 88 attribdict[tag] |= set(macro.attribs) 89 # Figure out which instructions write predicate registers 90 tagregs = get_tagregs() 91 for tag in tags: 92 regs = tagregs[tag] 93 for regtype, regid, toss, numregs in regs: 94 if regtype == "P" and is_written(regid): 95 attribdict[tag].add('A_WRITES_PRED_REG') 96 97def SEMANTICS(tag, beh, sem): 98 #print tag,beh,sem 99 behdict[tag] = beh 100 semdict[tag] = sem 101 attribdict[tag] = set() 102 tags.append(tag) # dicts have no order, this is for order 103 104def ATTRIBUTES(tag, attribstring): 105 attribstring = \ 106 attribstring.replace("ATTRIBS","").replace("(","").replace(")","") 107 if not attribstring: 108 return 109 attribs = attribstring.split(",") 110 for attrib in attribs: 111 attribdict[tag].add(attrib.strip()) 112 113class Macro(object): 114 __slots__ = ['key','name', 'beh', 'attribs', 're'] 115 def __init__(self, name, beh, attribs): 116 self.key = name 117 self.name = name 118 self.beh = beh 119 self.attribs = set(attribs) 120 self.re = re.compile("\\b" + name + "\\b") 121 122def MACROATTRIB(macname,beh,attribstring): 123 attribstring = attribstring.replace("(","").replace(")","") 124 if attribstring: 125 attribs = attribstring.split(",") 126 else: 127 attribs = [] 128 macros[macname] = Macro(macname,beh,attribs) 129 130def compute_tag_regs(tag): 131 return uniquify(regre.findall(behdict[tag])) 132 133def compute_tag_immediates(tag): 134 return uniquify(immre.findall(behdict[tag])) 135 136## 137## tagregs is the main data structure we'll use 138## tagregs[tag] will contain the registers used by an instruction 139## Within each entry, we'll use the regtype and regid fields 140## regtype can be one of the following 141## C control register 142## N new register value 143## P predicate register 144## R GPR register 145## M modifier register 146## regid can be one of the following 147## d, e destination register 148## dd destination register pair 149## s, t, u, v, w source register 150## ss, tt, uu, vv source register pair 151## x, y read-write register 152## xx, yy read-write register pair 153## 154def get_tagregs(): 155 return dict(zip(tags, list(map(compute_tag_regs, tags)))) 156 157def get_tagimms(): 158 return dict(zip(tags, list(map(compute_tag_immediates, tags)))) 159 160def is_pair(regid): 161 return len(regid) == 2 162 163def is_single(regid): 164 return len(regid) == 1 165 166def is_written(regid): 167 return regid[0] in "dexy" 168 169def is_writeonly(regid): 170 return regid[0] in "de" 171 172def is_read(regid): 173 return regid[0] in "stuvwxy" 174 175def is_readwrite(regid): 176 return regid[0] in "xy" 177 178def is_scalar_reg(regtype): 179 return regtype in "RPC" 180 181def is_old_val(regtype, regid, tag): 182 return regtype+regid+'V' in semdict[tag] 183 184def is_new_val(regtype, regid, tag): 185 return regtype+regid+'N' in semdict[tag] 186 187def need_slot(tag): 188 if ('A_CONDEXEC' in attribdict[tag] or 189 'A_STORE' in attribdict[tag] or 190 'A_LOAD' in attribdict[tag]): 191 return 1 192 else: 193 return 0 194 195def need_part1(tag): 196 return re.compile(r"fPART1").search(semdict[tag]) 197 198def need_ea(tag): 199 return re.compile(r"\bEA\b").search(semdict[tag]) 200 201def skip_qemu_helper(tag): 202 return tag in overrides.keys() 203 204def imm_name(immlett): 205 return "%siV" % immlett 206 207def read_semantics_file(name): 208 eval_line = "" 209 for line in open(name, 'rt').readlines(): 210 if not line.startswith("#"): 211 eval_line += line 212 if line.endswith("\\\n"): 213 eval_line.rstrip("\\\n") 214 else: 215 eval(eval_line.strip()) 216 eval_line = "" 217 218def read_attribs_file(name): 219 attribre = re.compile(r'DEF_ATTRIB\(([A-Za-z0-9_]+), ([^,]*), ' + 220 r'"([A-Za-z0-9_\.]*)", "([A-Za-z0-9_\.]*)"\)') 221 for line in open(name, 'rt').readlines(): 222 if not attribre.match(line): 223 continue 224 (attrib_base,descr,rreg,wreg) = attribre.findall(line)[0] 225 attrib_base = 'A_' + attrib_base 226 attribinfo[attrib_base] = {'rreg':rreg, 'wreg':wreg, 'descr':descr} 227 228def read_overrides_file(name): 229 overridere = re.compile("#define fGEN_TCG_([A-Za-z0-9_]+)\(.*") 230 for line in open(name, 'rt').readlines(): 231 if not overridere.match(line): 232 continue 233 tag = overridere.findall(line)[0] 234 overrides[tag] = True 235