Yaya48
cf256aa081
Upstream: https://gitlab.com/qemu-project/qemu.git Upstream-Commit: d2e570cc0f97b936902a5b1b86b73c0f5998b475
184 lines
6.0 KiB
Python
Executable File
184 lines
6.0 KiB
Python
Executable File
#!/usr/bin/env python3
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##
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## Copyright(c) 2019-2024 Qualcomm Innovation Center, Inc. All Rights Reserved.
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##
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## This program is free software; you can redistribute it and/or modify
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## it under the terms of the GNU General Public License as published by
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## the Free Software Foundation; either version 2 of the License, or
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## (at your option) any later version.
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##
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## This program is distributed in the hope that it will be useful,
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## but WITHOUT ANY WARRANTY; without even the implied warranty of
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## MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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## GNU General Public License for more details.
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##
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## You should have received a copy of the GNU General Public License
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## along with this program; if not, see <http://www.gnu.org/licenses/>.
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##
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import sys
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import re
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import string
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import hex_common
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from textwrap import dedent
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def gen_disabled_ieee_insn(f, tag, regs):
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f.write(" if (!ctx->ieee_fp_extension) {\n")
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for regtype, regid in regs:
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reg = hex_common.get_register(tag, regtype, regid)
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if reg.is_hvx_reg() and reg.is_written():
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reg.gen_zero(f)
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f.write(" return;\n")
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f.write(" }\n")
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##
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## Generate the TCG code to call the helper
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## For A2_add: Rd32=add(Rs32,Rt32), { RdV=RsV+RtV;}
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## We produce:
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## static void generate_A2_add(DisasContext *ctx)
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## {
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## Insn *insn G_GNUC_UNUSED = ctx->insn;
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## const int RdN = insn->regno[0];
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## TCGv RdV = get_result_gpr(ctx, RdN);
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## TCGv RsV = hex_gpr[insn->regno[1]];
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## TCGv RtV = hex_gpr[insn->regno[2]];
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## <GEN>
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## }
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##
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## where <GEN> depends on hex_common.skip_qemu_helper(tag)
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## if hex_common.skip_qemu_helper(tag) is True
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## <GEN> is fGEN_TCG_A2_add({ RdV=RsV+RtV;});
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## if hex_common.skip_qemu_helper(tag) is False
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## <GEN> is gen_helper_A2_add(RdV, tcg_env, RsV, RtV);
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##
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def gen_tcg_func(f, tag, regs, imms):
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f.write(f"static void generate_{tag}(DisasContext *ctx)\n")
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f.write("{\n")
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f.write(" Insn *insn G_GNUC_UNUSED = ctx->insn;\n")
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if "A_PRIV" in hex_common.attribdict[tag]:
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f.write(dedent("""\
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#ifdef CONFIG_USER_ONLY
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hex_gen_exception_end_tb(ctx, HEX_CAUSE_PRIV_USER_NO_SINSN);
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#else
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"""))
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if "A_GUEST" in hex_common.attribdict[tag]:
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f.write(dedent("""\
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#ifdef CONFIG_USER_ONLY
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hex_gen_exception_end_tb(ctx, HEX_CAUSE_PRIV_USER_NO_GINSN);
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#else
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"""))
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if hex_common.need_ea(tag):
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f.write(" TCGv EA G_GNUC_UNUSED = tcg_temp_new();\n")
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## Declare all the operands (regs and immediates)
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i = 0
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for regtype, regid in regs:
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reg = hex_common.get_register(tag, regtype, regid)
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reg.decl_tcg(f, tag, i)
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i += 1
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for immlett, bits, immshift in imms:
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i = 1 if immlett.isupper() else 0
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f.write(f" int {hex_common.imm_name(immlett)} = insn->immed[{i}];\n")
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if "A_HVX_IEEE_FP" in hex_common.attribdict[tag]:
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gen_disabled_ieee_insn(f, tag, regs)
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if hex_common.is_idef_parser_enabled(tag):
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gpr_operands = [
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hex_common.get_register(tag, regtype, regid)
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for regtype, regid in regs
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if hex_common.get_register(tag, regtype, regid).may_alias_gpr()
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]
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dests = [reg for reg in gpr_operands if reg.is_written()]
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for reg in gpr_operands:
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if reg.is_written() or not reg.is_read():
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continue
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src = reg.reg_tcg()
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for dest in dests:
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f.write(hex_common.code_fmt(f"""\
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{src} = gen_unalias_gpr_src({src}, {dest.reg_tcg()});
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"""))
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declared = []
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## Handle registers
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for regtype, regid in regs:
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reg = hex_common.get_register(tag, regtype, regid)
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reg.idef_arg(declared)
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## Handle immediates
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for immlett, bits, immshift in imms:
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declared.append(hex_common.imm_name(immlett))
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arguments = ", ".join(["ctx", "ctx->insn", "&ctx->pkt"] + declared)
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f.write(f" emit_{tag}({arguments});\n")
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elif hex_common.skip_qemu_helper(tag):
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if "A_FPOP" in hex_common.attribdict[tag]:
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f.write(" TCGv pkt_need_commit = ")
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f.write("tcg_constant_tl(ctx->need_commit);\n")
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f.write(f" fGEN_TCG_{tag}({hex_common.semdict[tag]});\n")
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else:
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## Generate the call to the helper
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declared = []
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ret_type = hex_common.helper_ret_type(tag, regs).call_arg
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if ret_type != "void":
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declared.append(ret_type)
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for arg in hex_common.helper_args(tag, regs, imms):
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declared.append(arg.call_arg)
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arguments = ", ".join(declared)
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f.write(f" gen_helper_{tag}({arguments});\n")
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## Write all the outputs
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for regtype, regid in regs:
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reg = hex_common.get_register(tag, regtype, regid)
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if reg.is_written():
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reg.gen_write(f, tag)
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if (
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"A_PRIV" in hex_common.attribdict[tag]
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or "A_GUEST" in hex_common.attribdict[tag]
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):
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f.write("#endif /* CONFIG_USER_ONLY */\n")
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f.write("}\n\n")
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def gen_def_tcg_func(f, tag, tagregs, tagimms):
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regs = tagregs[tag]
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imms = tagimms[tag]
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gen_tcg_func(f, tag, regs, imms)
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def main():
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args = hex_common.parse_common_args(
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"Emit functions calling generated code implementing instruction semantics (helpers, idef-parser)"
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)
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tagregs = hex_common.get_tagregs()
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tagimms = hex_common.get_tagimms()
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with open(args.out, "w") as f:
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f.write("#ifndef HEXAGON_TCG_FUNCS_H\n")
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f.write("#define HEXAGON_TCG_FUNCS_H\n\n")
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if args.idef_parser:
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f.write('#include "idef-generated-emitter.h.inc"\n\n')
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for tag in hex_common.tags:
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if hex_common.tag_ignore(tag):
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f.write(f"static void generate_{tag}"
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f"(DisasContext *ctx)\n")
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f.write("{\n}\n\n")
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continue
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gen_def_tcg_func(f, tag, tagregs, tagimms)
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f.write("#endif /* HEXAGON_TCG_FUNCS_H */\n")
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if __name__ == "__main__":
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main()
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