2021-02-08 08:46:10 +03:00
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#!/usr/bin/env python3
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##
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Hexagon (target/hexagon) Remove gen_log_predicated_reg_write[_pair]
We assign the instruction destination register to hex_new_value[num]
instead of a TCG temp that gets copied back to hex_new_value[num].
We introduce new functions get_result_gpr[_pair] to facilitate getting
the proper destination register.
Since we preload hex_new_value for predicated instructions, we don't
need the check for slot_cancelled. So, we call gen_log_reg_write instead.
We update the helper function generation and gen_tcg.h to maintain the
disable-hexagon-idef-parser configuration.
Here is a simple example of the differences in the TCG code generated:
IN:
0x00400094: 0xf900c102 { if (P0) R2 = and(R0,R1) }
BEFORE
---- 00400094
mov_i32 slot_cancelled,$0x0
mov_i32 new_r2,r2
mov_i32 loc2,$0x0
and_i32 tmp0,p0,$0x1
brcond_i32 tmp0,$0x0,eq,$L1
and_i32 tmp0,r0,r1
mov_i32 loc2,tmp0
br $L2
set_label $L1
or_i32 slot_cancelled,slot_cancelled,$0x8
set_label $L2
and_i32 tmp0,slot_cancelled,$0x8
movcond_i32 new_r2,tmp0,$0x0,loc2,new_r2,eq
mov_i32 r2,new_r2
AFTER
---- 00400094
mov_i32 slot_cancelled,$0x0
mov_i32 new_r2,r2
and_i32 tmp0,p0,$0x1
brcond_i32 tmp0,$0x0,eq,$L1
and_i32 tmp0,r0,r1
mov_i32 new_r2,tmp0
br $L2
set_label $L1
or_i32 slot_cancelled,slot_cancelled,$0x8
set_label $L2
mov_i32 r2,new_r2
We'll remove the unnecessary manipulation of slot_cancelled in a
subsequent patch.
Signed-off-by: Taylor Simpson <tsimpson@quicinc.com>
Reviewed-by: Anton Johansson <anjo@rev.ng>
Message-Id: <20230307025828.1612809-13-tsimpson@quicinc.com>
2023-03-07 05:58:26 +03:00
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## Copyright(c) 2019-2023 Qualcomm Innovation Center, Inc. All Rights Reserved.
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2021-02-08 08:46:10 +03:00
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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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2023-03-20 12:25:33 +03:00
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2021-02-08 08:46:10 +03:00
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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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## int32_t HELPER(A2_add)(CPUHexagonState *env, int32_t RsV, int32_t RtV)
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## {
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## int32_t RdV = 0;
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## { RdV=RsV+RtV;}
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## return RdV;
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## }
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##
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def gen_helper_function(f, tag, tagregs, tagimms):
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regs = tagregs[tag]
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imms = tagimms[tag]
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2023-12-11 01:07:07 +03:00
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ret_type = hex_common.helper_ret_type(tag, regs).func_arg
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declared = []
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for arg in hex_common.helper_args(tag, regs, imms):
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declared.append(arg.func_arg)
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arguments = ", ".join(declared)
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f.write(f"{ret_type} HELPER({tag})({arguments})\n")
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f.write("{\n")
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if hex_common.need_ea(tag):
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f.write(hex_common.code_fmt(f"""\
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uint32_t EA;
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"""))
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## Declare the return variable
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if not hex_common.is_predicated(tag):
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2023-05-24 17:41:47 +03:00
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for regtype, regid in regs:
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2023-12-11 01:07:07 +03:00
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reg = hex_common.get_register(tag, regtype, regid)
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if reg.is_writeonly() and not reg.is_hvx_reg():
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f.write(hex_common.code_fmt(f"""\
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{reg.helper_arg_type()} {reg.helper_arg_name()} = 0;
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"""))
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2021-02-08 08:46:10 +03:00
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2023-12-11 01:07:07 +03:00
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## Print useful information about HVX 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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if reg.is_hvx_reg():
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reg.helper_hvx_desc(f)
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if hex_common.need_slot(tag):
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if "A_LOAD" in hex_common.attribdict[tag]:
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f.write(hex_common.code_fmt(f"""\
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bool pkt_has_store_s1 = slotval & 0x1;
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"""))
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f.write(hex_common.code_fmt(f"""\
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uint32_t slot = slotval >> 1;
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"""))
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if "A_FPOP" in hex_common.attribdict[tag]:
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f.write(hex_common.code_fmt(f"""\
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arch_fpop_start(env);
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"""))
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f.write(hex_common.code_fmt(f"""\
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{hex_common.semdict[tag]}
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"""))
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if "A_FPOP" in hex_common.attribdict[tag]:
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f.write(hex_common.code_fmt(f"""\
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arch_fpop_end(env);
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"""))
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## Return the scalar result
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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() and not reg.is_hvx_reg():
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f.write(hex_common.code_fmt(f"""\
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return {reg.helper_arg_name()};
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"""))
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2021-02-08 08:46:10 +03:00
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2023-12-11 01:07:07 +03:00
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f.write("}\n\n")
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## End of the helper definition
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2021-02-08 08:46:10 +03:00
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2023-03-20 12:25:33 +03:00
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2021-02-08 08:46:10 +03:00
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def main():
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hex_common.read_semantics_file(sys.argv[1])
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hex_common.read_attribs_file(sys.argv[2])
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hex_common.read_overrides_file(sys.argv[3])
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2021-05-18 20:01:09 +03:00
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hex_common.read_overrides_file(sys.argv[4])
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2022-09-23 20:38:30 +03:00
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## Whether or not idef-parser is enabled is
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## determined by the number of arguments to
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## this script:
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##
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## 5 args. -> not enabled,
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## 6 args. -> idef-parser enabled.
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##
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## The 6:th arg. then holds a list of the successfully
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## parsed instructions.
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is_idef_parser_enabled = len(sys.argv) > 6
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if is_idef_parser_enabled:
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hex_common.read_idef_parser_enabled_file(sys.argv[5])
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2021-02-08 08:46:10 +03:00
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hex_common.calculate_attribs()
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2023-12-11 01:07:07 +03:00
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hex_common.init_registers()
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2021-02-08 08:46:10 +03:00
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tagregs = hex_common.get_tagregs()
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tagimms = hex_common.get_tagimms()
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2022-09-23 20:38:30 +03:00
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output_file = sys.argv[-1]
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2023-03-20 12:25:33 +03:00
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with open(output_file, "w") as f:
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2021-02-08 08:46:10 +03:00
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for tag in hex_common.tags:
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## Skip the priv instructions
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2023-03-20 12:25:33 +03:00
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if "A_PRIV" in hex_common.attribdict[tag]:
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2021-02-08 08:46:10 +03:00
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continue
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## Skip the guest instructions
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2023-03-20 12:25:33 +03:00
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if "A_GUEST" in hex_common.attribdict[tag]:
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2021-02-08 08:46:10 +03:00
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continue
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## Skip the diag instructions
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2023-03-20 12:25:33 +03:00
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if tag == "Y6_diag":
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2021-02-08 08:46:10 +03:00
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continue
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2023-03-20 12:25:33 +03:00
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if tag == "Y6_diag0":
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2021-02-08 08:46:10 +03:00
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continue
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2023-03-20 12:25:33 +03:00
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if tag == "Y6_diag1":
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2021-02-08 08:46:10 +03:00
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continue
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2023-03-20 12:25:33 +03:00
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if hex_common.skip_qemu_helper(tag):
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2021-02-08 08:46:10 +03:00
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continue
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2023-03-20 12:25:33 +03:00
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if hex_common.is_idef_parser_enabled(tag):
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2022-09-23 20:38:30 +03:00
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continue
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2021-02-08 08:46:10 +03:00
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gen_helper_function(f, tag, tagregs, tagimms)
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2023-03-20 12:25:33 +03:00
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2021-02-08 08:46:10 +03:00
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if __name__ == "__main__":
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main()
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