gen_helper_funcs.py (7622B)
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 23import hex_common 24 25## 26## Helpers for gen_helper_function 27## 28def gen_decl_ea(f): 29 f.write(" uint32_t EA;\n") 30 31def gen_helper_return_type(f,regtype,regid,regno): 32 if regno > 1 : f.write(", ") 33 f.write("int32_t") 34 35def gen_helper_return_type_pair(f,regtype,regid,regno): 36 if regno > 1 : f.write(", ") 37 f.write("int64_t") 38 39def gen_helper_arg(f,regtype,regid,regno): 40 if regno > 0 : f.write(", " ) 41 f.write("int32_t %s%sV" % (regtype,regid)) 42 43def gen_helper_arg_new(f,regtype,regid,regno): 44 if regno >= 0 : f.write(", " ) 45 f.write("int32_t %s%sN" % (regtype,regid)) 46 47def gen_helper_arg_pair(f,regtype,regid,regno): 48 if regno >= 0 : f.write(", ") 49 f.write("int64_t %s%sV" % (regtype,regid)) 50 51def gen_helper_arg_opn(f,regtype,regid,i,tag): 52 if (hex_common.is_pair(regid)): 53 gen_helper_arg_pair(f,regtype,regid,i) 54 elif (hex_common.is_single(regid)): 55 if hex_common.is_old_val(regtype, regid, tag): 56 gen_helper_arg(f,regtype,regid,i) 57 elif hex_common.is_new_val(regtype, regid, tag): 58 gen_helper_arg_new(f,regtype,regid,i) 59 else: 60 print("Bad register parse: ",regtype,regid,toss,numregs) 61 else: 62 print("Bad register parse: ",regtype,regid,toss,numregs) 63 64def gen_helper_arg_imm(f,immlett): 65 f.write(", int32_t %s" % (hex_common.imm_name(immlett))) 66 67def gen_helper_dest_decl(f,regtype,regid,regno,subfield=""): 68 f.write(" int32_t %s%sV%s = 0;\n" % \ 69 (regtype,regid,subfield)) 70 71def gen_helper_dest_decl_pair(f,regtype,regid,regno,subfield=""): 72 f.write(" int64_t %s%sV%s = 0;\n" % \ 73 (regtype,regid,subfield)) 74 75def gen_helper_dest_decl_opn(f,regtype,regid,i): 76 if (hex_common.is_pair(regid)): 77 gen_helper_dest_decl_pair(f,regtype,regid,i) 78 elif (hex_common.is_single(regid)): 79 gen_helper_dest_decl(f,regtype,regid,i) 80 else: 81 print("Bad register parse: ",regtype,regid,toss,numregs) 82 83def gen_helper_return(f,regtype,regid,regno): 84 f.write(" return %s%sV;\n" % (regtype,regid)) 85 86def gen_helper_return_pair(f,regtype,regid,regno): 87 f.write(" return %s%sV;\n" % (regtype,regid)) 88 89def gen_helper_return_opn(f, regtype, regid, i): 90 if (hex_common.is_pair(regid)): 91 gen_helper_return_pair(f,regtype,regid,i) 92 elif (hex_common.is_single(regid)): 93 gen_helper_return(f,regtype,regid,i) 94 else: 95 print("Bad register parse: ",regtype,regid,toss,numregs) 96 97## 98## Generate the TCG code to call the helper 99## For A2_add: Rd32=add(Rs32,Rt32), { RdV=RsV+RtV;} 100## We produce: 101## int32_t HELPER(A2_add)(CPUHexagonState *env, int32_t RsV, int32_t RtV) 102## { 103## uint32_t slot __attribute__(unused)) = 4; 104## int32_t RdV = 0; 105## { RdV=RsV+RtV;} 106## COUNT_HELPER(A2_add); 107## return RdV; 108## } 109## 110def gen_helper_function(f, tag, tagregs, tagimms): 111 regs = tagregs[tag] 112 imms = tagimms[tag] 113 114 numresults = 0 115 numscalarresults = 0 116 numscalarreadwrite = 0 117 for regtype,regid,toss,numregs in regs: 118 if (hex_common.is_written(regid)): 119 numresults += 1 120 if (hex_common.is_scalar_reg(regtype)): 121 numscalarresults += 1 122 if (hex_common.is_readwrite(regid)): 123 if (hex_common.is_scalar_reg(regtype)): 124 numscalarreadwrite += 1 125 126 if (numscalarresults > 1): 127 ## The helper is bogus when there is more than one result 128 f.write("void HELPER(%s)(CPUHexagonState *env) { BOGUS_HELPER(%s); }\n" 129 % (tag, tag)) 130 else: 131 ## The return type of the function is the type of the destination 132 ## register 133 i=0 134 for regtype,regid,toss,numregs in regs: 135 if (hex_common.is_written(regid)): 136 if (hex_common.is_pair(regid)): 137 gen_helper_return_type_pair(f,regtype,regid,i) 138 elif (hex_common.is_single(regid)): 139 gen_helper_return_type(f,regtype,regid,i) 140 else: 141 print("Bad register parse: ",regtype,regid,toss,numregs) 142 i += 1 143 144 if (numscalarresults == 0): 145 f.write("void") 146 f.write(" HELPER(%s)(CPUHexagonState *env" % tag) 147 148 i = 1 149 150 ## Arguments to the helper function are the source regs and immediates 151 for regtype,regid,toss,numregs in regs: 152 if (hex_common.is_read(regid)): 153 gen_helper_arg_opn(f,regtype,regid,i,tag) 154 i += 1 155 for immlett,bits,immshift in imms: 156 gen_helper_arg_imm(f,immlett) 157 i += 1 158 if hex_common.need_slot(tag): 159 if i > 0: f.write(", ") 160 f.write("uint32_t slot") 161 i += 1 162 if hex_common.need_part1(tag): 163 if i > 0: f.write(", ") 164 f.write("uint32_t part1") 165 f.write(")\n{\n") 166 if (not hex_common.need_slot(tag)): 167 f.write(" uint32_t slot __attribute__((unused)) = 4;\n" ) 168 if hex_common.need_ea(tag): gen_decl_ea(f) 169 ## Declare the return variable 170 i=0 171 for regtype,regid,toss,numregs in regs: 172 if (hex_common.is_writeonly(regid)): 173 gen_helper_dest_decl_opn(f,regtype,regid,i) 174 i += 1 175 176 if 'A_FPOP' in hex_common.attribdict[tag]: 177 f.write(' arch_fpop_start(env);\n'); 178 179 f.write(" %s\n" % hex_common.semdict[tag]) 180 181 if 'A_FPOP' in hex_common.attribdict[tag]: 182 f.write(' arch_fpop_end(env);\n'); 183 184 ## Save/return the return variable 185 for regtype,regid,toss,numregs in regs: 186 if (hex_common.is_written(regid)): 187 gen_helper_return_opn(f, regtype, regid, i) 188 f.write("}\n\n") 189 ## End of the helper definition 190 191def main(): 192 hex_common.read_semantics_file(sys.argv[1]) 193 hex_common.read_attribs_file(sys.argv[2]) 194 hex_common.read_overrides_file(sys.argv[3]) 195 hex_common.calculate_attribs() 196 tagregs = hex_common.get_tagregs() 197 tagimms = hex_common.get_tagimms() 198 199 with open(sys.argv[4], 'w') as f: 200 for tag in hex_common.tags: 201 ## Skip the priv instructions 202 if ( "A_PRIV" in hex_common.attribdict[tag] ) : 203 continue 204 ## Skip the guest instructions 205 if ( "A_GUEST" in hex_common.attribdict[tag] ) : 206 continue 207 ## Skip the diag instructions 208 if ( tag == "Y6_diag" ) : 209 continue 210 if ( tag == "Y6_diag0" ) : 211 continue 212 if ( tag == "Y6_diag1" ) : 213 continue 214 if ( hex_common.skip_qemu_helper(tag) ): 215 continue 216 217 gen_helper_function(f, tag, tagregs, tagimms) 218 219if __name__ == "__main__": 220 main()