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qemu/target/hexagon/gen_tcg_funcs.py
Matheus Tavares Bernardino 772b3eb4b4 Hexagon (gen_tcg_funcs.py): avoid duplicated tcg code on A_CVI_NEW 
Hexagon instructions with the A_CVI_NEW attribute produce a vector value
that can be used in the same packet. The python function responsible for
generating code for such instructions has a typo ("if" instead of
"elif"), which makes genptr_dst_write_ext() be executed twice, thus also
generating the same tcg code twice. Fortunately, this doesn't cause any
problems for correctness, but it is less efficient than it could be. Fix
it by using an "elif" and avoiding the unnecessary extra code gen.

Signed-off-by: Matheus Tavares Bernardino <quic_mathbern@quicinc.com>
Signed-off-by: Taylor Simpson <tsimpson@quicinc.com>
Reviewed-by: Philippe Mathieu-Daudé <f4bug@amsat.org>
Reviewed-by: Richard Henderson <richard.henderson@linaro.org>
Reviewed-by: Taylor Simpson <tsimpson@quicinc.com>
Message-Id: <fa706b192b2a3a0ffbd399fa8dbf0d5b2c5b82d9.1664568492.git.quic_mathbern@quicinc.com>
2022-10-03 11:07:44 -07:00

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#!/usr/bin/env python3
##
## Copyright(c) 2019-2022 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
##
## Helpers for gen_tcg_func
##
def gen_decl_ea_tcg(f, tag):
if ('A_CONDEXEC' in hex_common.attribdict[tag] or
'A_LOAD' in hex_common.attribdict[tag]):
f.write(" TCGv EA = tcg_temp_local_new();\n")
else:
f.write(" TCGv EA = tcg_temp_new();\n")
def gen_free_ea_tcg(f):
f.write(" tcg_temp_free(EA);\n")
def genptr_decl_pair_writable(f, tag, regtype, regid, regno):
regN="%s%sN" % (regtype,regid)
f.write(" TCGv_i64 %s%sV = tcg_temp_local_new_i64();\n" % \
(regtype, regid))
if (regtype == "C"):
f.write(" const int %s = insn->regno[%d] + HEX_REG_SA0;\n" % \
(regN, regno))
else:
f.write(" const int %s = insn->regno[%d];\n" % (regN, regno))
if ('A_CONDEXEC' in hex_common.attribdict[tag]):
f.write(" if (!is_preloaded(ctx, %s)) {\n" % regN)
f.write(" tcg_gen_mov_tl(hex_new_value[%s], hex_gpr[%s]);\n" % \
(regN, regN))
f.write(" }\n")
f.write(" if (!is_preloaded(ctx, %s + 1)) {\n" % regN)
f.write(" tcg_gen_mov_tl(hex_new_value[%s + 1], hex_gpr[%s + 1]);\n" % \
(regN, regN))
f.write(" }\n")
def genptr_decl_writable(f, tag, regtype, regid, regno):
regN="%s%sN" % (regtype,regid)
f.write(" TCGv %s%sV = tcg_temp_local_new();\n" % \
(regtype, regid))
if (regtype == "C"):
f.write(" const int %s = insn->regno[%d] + HEX_REG_SA0;\n" % \
(regN, regno))
else:
f.write(" const int %s = insn->regno[%d];\n" % (regN, regno))
if ('A_CONDEXEC' in hex_common.attribdict[tag]):
f.write(" if (!is_preloaded(ctx, %s)) {\n" % regN)
f.write(" tcg_gen_mov_tl(hex_new_value[%s], hex_gpr[%s]);\n" % \
(regN, regN))
f.write(" }\n")
def genptr_decl(f, tag, regtype, regid, regno):
regN="%s%sN" % (regtype,regid)
if (regtype == "R"):
if (regid in {"ss", "tt"}):
f.write(" TCGv_i64 %s%sV = tcg_temp_local_new_i64();\n" % \
(regtype, regid))
f.write(" const int %s = insn->regno[%d];\n" % \
(regN, regno))
elif (regid in {"dd", "ee", "xx", "yy"}):
genptr_decl_pair_writable(f, tag, regtype, regid, regno)
elif (regid in {"s", "t", "u", "v"}):
f.write(" TCGv %s%sV = hex_gpr[insn->regno[%d]];\n" % \
(regtype, regid, regno))
elif (regid in {"d", "e", "x", "y"}):
genptr_decl_writable(f, tag, regtype, regid, regno)
else:
print("Bad register parse: ", regtype, regid)
elif (regtype == "P"):
if (regid in {"s", "t", "u", "v"}):
f.write(" TCGv %s%sV = hex_pred[insn->regno[%d]];\n" % \
(regtype, regid, regno))
elif (regid in {"d", "e", "x"}):
genptr_decl_writable(f, tag, regtype, regid, regno)
else:
print("Bad register parse: ", regtype, regid)
elif (regtype == "C"):
if (regid == "ss"):
f.write(" TCGv_i64 %s%sV = tcg_temp_local_new_i64();\n" % \
(regtype, regid))
f.write(" const int %s = insn->regno[%d] + HEX_REG_SA0;\n" % \
(regN, regno))
elif (regid == "dd"):
genptr_decl_pair_writable(f, tag, regtype, regid, regno)
elif (regid == "s"):
f.write(" TCGv %s%sV = tcg_temp_local_new();\n" % \
(regtype, regid))
f.write(" const int %s%sN = insn->regno[%d] + HEX_REG_SA0;\n" % \
(regtype, regid, regno))
elif (regid == "d"):
genptr_decl_writable(f, tag, regtype, regid, regno)
else:
print("Bad register parse: ", regtype, regid)
elif (regtype == "M"):
if (regid == "u"):
f.write(" const int %s%sN = insn->regno[%d];\n"% \
(regtype, regid, regno))
f.write(" TCGv %s%sV = hex_gpr[%s%sN + HEX_REG_M0];\n" % \
(regtype, regid, regtype, regid))
else:
print("Bad register parse: ", regtype, regid)
elif (regtype == "V"):
if (regid in {"dd"}):
f.write(" const int %s%sN = insn->regno[%d];\n" %\
(regtype, regid, regno))
f.write(" const intptr_t %s%sV_off =\n" %\
(regtype, regid))
if (hex_common.is_tmp_result(tag)):
f.write(" ctx_tmp_vreg_off(ctx, %s%sN, 2, true);\n" % \
(regtype, regid))
else:
f.write(" ctx_future_vreg_off(ctx, %s%sN," % \
(regtype, regid))
f.write(" 2, true);\n")
if (not hex_common.skip_qemu_helper(tag)):
f.write(" TCGv_ptr %s%sV = tcg_temp_new_ptr();\n" % \
(regtype, regid))
f.write(" tcg_gen_addi_ptr(%s%sV, cpu_env, %s%sV_off);\n" % \
(regtype, regid, regtype, regid))
elif (regid in {"uu", "vv", "xx"}):
f.write(" const int %s%sN = insn->regno[%d];\n" % \
(regtype, regid, regno))
f.write(" const intptr_t %s%sV_off =\n" % \
(regtype, regid))
f.write(" offsetof(CPUHexagonState, %s%sV);\n" % \
(regtype, regid))
if (not hex_common.skip_qemu_helper(tag)):
f.write(" TCGv_ptr %s%sV = tcg_temp_new_ptr();\n" % \
(regtype, regid))
f.write(" tcg_gen_addi_ptr(%s%sV, cpu_env, %s%sV_off);\n" % \
(regtype, regid, regtype, regid))
elif (regid in {"s", "u", "v", "w"}):
f.write(" const int %s%sN = insn->regno[%d];\n" % \
(regtype, regid, regno))
f.write(" const intptr_t %s%sV_off =\n" % \
(regtype, regid))
f.write(" vreg_src_off(ctx, %s%sN);\n" % \
(regtype, regid))
if (not hex_common.skip_qemu_helper(tag)):
f.write(" TCGv_ptr %s%sV = tcg_temp_new_ptr();\n" % \
(regtype, regid))
elif (regid in {"d", "x", "y"}):
f.write(" const int %s%sN = insn->regno[%d];\n" % \
(regtype, regid, regno))
f.write(" const intptr_t %s%sV_off =\n" % \
(regtype, regid))
if (regid == "y"):
f.write(" offsetof(CPUHexagonState, vtmp);\n")
elif (hex_common.is_tmp_result(tag)):
f.write(" ctx_tmp_vreg_off(ctx, %s%sN, 1, true);\n" % \
(regtype, regid))
else:
f.write(" ctx_future_vreg_off(ctx, %s%sN," % \
(regtype, regid))
f.write(" 1, true);\n");
if (not hex_common.skip_qemu_helper(tag)):
f.write(" TCGv_ptr %s%sV = tcg_temp_new_ptr();\n" % \
(regtype, regid))
f.write(" tcg_gen_addi_ptr(%s%sV, cpu_env, %s%sV_off);\n" % \
(regtype, regid, regtype, regid))
else:
print("Bad register parse: ", regtype, regid)
elif (regtype == "Q"):
if (regid in {"d", "e", "x"}):
f.write(" const int %s%sN = insn->regno[%d];\n" % \
(regtype, regid, regno))
f.write(" const intptr_t %s%sV_off =\n" % \
(regtype, regid))
f.write(" offsetof(CPUHexagonState,\n")
f.write(" future_QRegs[%s%sN]);\n" % \
(regtype, regid))
if (not hex_common.skip_qemu_helper(tag)):
f.write(" TCGv_ptr %s%sV = tcg_temp_new_ptr();\n" % \
(regtype, regid))
f.write(" tcg_gen_addi_ptr(%s%sV, cpu_env, %s%sV_off);\n" % \
(regtype, regid, regtype, regid))
elif (regid in {"s", "t", "u", "v"}):
f.write(" const int %s%sN = insn->regno[%d];\n" % \
(regtype, regid, regno))
f.write(" const intptr_t %s%sV_off =\n" %\
(regtype, regid))
f.write(" offsetof(CPUHexagonState, QRegs[%s%sN]);\n" % \
(regtype, regid))
if (not hex_common.skip_qemu_helper(tag)):
f.write(" TCGv_ptr %s%sV = tcg_temp_new_ptr();\n" % \
(regtype, regid))
else:
print("Bad register parse: ", regtype, regid)
else:
print("Bad register parse: ", regtype, regid)
def genptr_decl_new(f, tag, regtype, regid, regno):
if (regtype == "N"):
if (regid in {"s", "t"}):
f.write(" TCGv %s%sN = hex_new_value[insn->regno[%d]];\n" % \
(regtype, regid, regno))
else:
print("Bad register parse: ", regtype, regid)
elif (regtype == "P"):
if (regid in {"t", "u", "v"}):
f.write(" TCGv %s%sN = hex_new_pred_value[insn->regno[%d]];\n" % \
(regtype, regid, regno))
else:
print("Bad register parse: ", regtype, regid)
elif (regtype == "O"):
if (regid == "s"):
f.write(" const intptr_t %s%sN_num = insn->regno[%d];\n" % \
(regtype, regid, regno))
if (hex_common.skip_qemu_helper(tag)):
f.write(" const intptr_t %s%sN_off =\n" % \
(regtype, regid))
f.write(" ctx_future_vreg_off(ctx, %s%sN_num," % \
(regtype, regid))
f.write(" 1, true);\n")
else:
f.write(" TCGv %s%sN = tcg_constant_tl(%s%sN_num);\n" % \
(regtype, regid, regtype, regid))
else:
print("Bad register parse: ", regtype, regid)
else:
print("Bad register parse: ", regtype, regid)
def genptr_decl_opn(f, tag, regtype, regid, toss, numregs, i):
if (hex_common.is_pair(regid)):
genptr_decl(f, tag, regtype, regid, i)
elif (hex_common.is_single(regid)):
if hex_common.is_old_val(regtype, regid, tag):
genptr_decl(f,tag, regtype, regid, i)
elif hex_common.is_new_val(regtype, regid, tag):
genptr_decl_new(f, tag, regtype, regid, i)
else:
print("Bad register parse: ",regtype,regid,toss,numregs)
else:
print("Bad register parse: ",regtype,regid,toss,numregs)
def genptr_decl_imm(f,immlett):
if (immlett.isupper()):
i = 1
else:
i = 0
f.write(" int %s = insn->immed[%d];\n" % \
(hex_common.imm_name(immlett), i))
def genptr_free(f, tag, regtype, regid, regno):
if (regtype == "R"):
if (regid in {"dd", "ss", "tt", "xx", "yy"}):
f.write(" tcg_temp_free_i64(%s%sV);\n" % (regtype, regid))
elif (regid in {"d", "e", "x", "y"}):
f.write(" tcg_temp_free(%s%sV);\n" % (regtype, regid))
elif (regid not in {"s", "t", "u", "v"}):
print("Bad register parse: ",regtype,regid)
elif (regtype == "P"):
if (regid in {"d", "e", "x"}):
f.write(" tcg_temp_free(%s%sV);\n" % (regtype, regid))
elif (regid not in {"s", "t", "u", "v"}):
print("Bad register parse: ",regtype,regid)
elif (regtype == "C"):
if (regid in {"dd", "ss"}):
f.write(" tcg_temp_free_i64(%s%sV);\n" % (regtype, regid))
elif (regid in {"d", "s"}):
f.write(" tcg_temp_free(%s%sV);\n" % (regtype, regid))
else:
print("Bad register parse: ",regtype,regid)
elif (regtype == "M"):
if (regid != "u"):
print("Bad register parse: ", regtype, regid)
elif (regtype == "V"):
if (regid in {"dd", "uu", "vv", "xx", \
"d", "s", "u", "v", "w", "x", "y"}):
if (not hex_common.skip_qemu_helper(tag)):
f.write(" tcg_temp_free_ptr(%s%sV);\n" % \
(regtype, regid))
else:
print("Bad register parse: ", regtype, regid)
elif (regtype == "Q"):
if (regid in {"d", "e", "s", "t", "u", "v", "x"}):
if (not hex_common.skip_qemu_helper(tag)):
f.write(" tcg_temp_free_ptr(%s%sV);\n" % \
(regtype, regid))
else:
print("Bad register parse: ", regtype, regid)
else:
print("Bad register parse: ", regtype, regid)
def genptr_free_new(f, tag, regtype, regid, regno):
if (regtype == "N"):
if (regid not in {"s", "t"}):
print("Bad register parse: ", regtype, regid)
elif (regtype == "P"):
if (regid not in {"t", "u", "v"}):
print("Bad register parse: ", regtype, regid)
elif (regtype == "O"):
if (regid != "s"):
print("Bad register parse: ", regtype, regid)
else:
print("Bad register parse: ", regtype, regid)
def genptr_free_opn(f,regtype,regid,i,tag):
if (hex_common.is_pair(regid)):
genptr_free(f, tag, regtype, regid, i)
elif (hex_common.is_single(regid)):
if hex_common.is_old_val(regtype, regid, tag):
genptr_free(f, tag, regtype, regid, i)
elif hex_common.is_new_val(regtype, regid, tag):
genptr_free_new(f, tag, regtype, regid, i)
else:
print("Bad register parse: ",regtype,regid,toss,numregs)
else:
print("Bad register parse: ",regtype,regid,toss,numregs)
def genptr_src_read(f, tag, regtype, regid):
if (regtype == "R"):
if (regid in {"ss", "tt", "xx", "yy"}):
f.write(" tcg_gen_concat_i32_i64(%s%sV, hex_gpr[%s%sN],\n" % \
(regtype, regid, regtype, regid))
f.write(" hex_gpr[%s%sN + 1]);\n" % \
(regtype, regid))
elif (regid in {"x", "y"}):
f.write(" tcg_gen_mov_tl(%s%sV, hex_gpr[%s%sN]);\n" % \
(regtype,regid,regtype,regid))
elif (regid not in {"s", "t", "u", "v"}):
print("Bad register parse: ", regtype, regid)
elif (regtype == "P"):
if (regid == "x"):
f.write(" tcg_gen_mov_tl(%s%sV, hex_pred[%s%sN]);\n" % \
(regtype, regid, regtype, regid))
elif (regid not in {"s", "t", "u", "v"}):
print("Bad register parse: ", regtype, regid)
elif (regtype == "C"):
if (regid == "ss"):
f.write(" gen_read_ctrl_reg_pair(ctx, %s%sN, %s%sV);\n" % \
(regtype, regid, regtype, regid))
elif (regid == "s"):
f.write(" gen_read_ctrl_reg(ctx, %s%sN, %s%sV);\n" % \
(regtype, regid, regtype, regid))
else:
print("Bad register parse: ", regtype, regid)
elif (regtype == "M"):
if (regid != "u"):
print("Bad register parse: ", regtype, regid)
elif (regtype == "V"):
if (regid in {"uu", "vv", "xx"}):
f.write(" tcg_gen_gvec_mov(MO_64, %s%sV_off,\n" % \
(regtype, regid))
f.write(" vreg_src_off(ctx, %s%sN),\n" % \
(regtype, regid))
f.write(" sizeof(MMVector), sizeof(MMVector));\n")
f.write(" tcg_gen_gvec_mov(MO_64,\n")
f.write(" %s%sV_off + sizeof(MMVector),\n" % \
(regtype, regid))
f.write(" vreg_src_off(ctx, %s%sN ^ 1),\n" % \
(regtype, regid))
f.write(" sizeof(MMVector), sizeof(MMVector));\n")
elif (regid in {"s", "u", "v", "w"}):
if (not hex_common.skip_qemu_helper(tag)):
f.write(" tcg_gen_addi_ptr(%s%sV, cpu_env, %s%sV_off);\n" % \
(regtype, regid, regtype, regid))
elif (regid in {"x", "y"}):
f.write(" tcg_gen_gvec_mov(MO_64, %s%sV_off,\n" % \
(regtype, regid))
f.write(" vreg_src_off(ctx, %s%sN),\n" % \
(regtype, regid))
f.write(" sizeof(MMVector), sizeof(MMVector));\n")
else:
print("Bad register parse: ", regtype, regid)
elif (regtype == "Q"):
if (regid in {"s", "t", "u", "v"}):
if (not hex_common.skip_qemu_helper(tag)):
f.write(" tcg_gen_addi_ptr(%s%sV, cpu_env, %s%sV_off);\n" % \
(regtype, regid, regtype, regid))
elif (regid in {"x"}):
f.write(" tcg_gen_gvec_mov(MO_64, %s%sV_off,\n" % \
(regtype, regid))
f.write(" offsetof(CPUHexagonState, QRegs[%s%sN]),\n" % \
(regtype, regid))
f.write(" sizeof(MMQReg), sizeof(MMQReg));\n")
else:
print("Bad register parse: ", regtype, regid)
else:
print("Bad register parse: ", regtype, regid)
def genptr_src_read_new(f,regtype,regid):
if (regtype == "N"):
if (regid not in {"s", "t"}):
print("Bad register parse: ", regtype, regid)
elif (regtype == "P"):
if (regid not in {"t", "u", "v"}):
print("Bad register parse: ", regtype, regid)
elif (regtype == "O"):
if (regid != "s"):
print("Bad register parse: ", regtype, regid)
else:
print("Bad register parse: ", regtype, regid)
def genptr_src_read_opn(f,regtype,regid,tag):
if (hex_common.is_pair(regid)):
genptr_src_read(f, tag, regtype, regid)
elif (hex_common.is_single(regid)):
if hex_common.is_old_val(regtype, regid, tag):
genptr_src_read(f, tag, regtype, regid)
elif hex_common.is_new_val(regtype, regid, tag):
genptr_src_read_new(f,regtype,regid)
else:
print("Bad register parse: ",regtype,regid,toss,numregs)
else:
print("Bad register parse: ",regtype,regid,toss,numregs)
def gen_helper_call_opn(f, tag, regtype, regid, toss, numregs, i):
if (i > 0): f.write(", ")
if (hex_common.is_pair(regid)):
f.write("%s%sV" % (regtype,regid))
elif (hex_common.is_single(regid)):
if hex_common.is_old_val(regtype, regid, tag):
f.write("%s%sV" % (regtype,regid))
elif hex_common.is_new_val(regtype, regid, tag):
f.write("%s%sN" % (regtype,regid))
else:
print("Bad register parse: ",regtype,regid,toss,numregs)
else:
print("Bad register parse: ",regtype,regid,toss,numregs)
def gen_helper_decl_imm(f,immlett):
f.write(" TCGv tcgv_%s = tcg_constant_tl(%s);\n" % \
(hex_common.imm_name(immlett), hex_common.imm_name(immlett)))
def gen_helper_call_imm(f,immlett):
f.write(", tcgv_%s" % hex_common.imm_name(immlett))
def genptr_dst_write_pair(f, tag, regtype, regid):
if ('A_CONDEXEC' in hex_common.attribdict[tag]):
f.write(" gen_log_predicated_reg_write_pair(%s%sN, %s%sV, insn->slot);\n" % \
(regtype, regid, regtype, regid))
else:
f.write(" gen_log_reg_write_pair(%s%sN, %s%sV);\n" % \
(regtype, regid, regtype, regid))
f.write(" ctx_log_reg_write_pair(ctx, %s%sN);\n" % \
(regtype, regid))
def genptr_dst_write(f, tag, regtype, regid):
if (regtype == "R"):
if (regid in {"dd", "xx", "yy"}):
genptr_dst_write_pair(f, tag, regtype, regid)
elif (regid in {"d", "e", "x", "y"}):
if ('A_CONDEXEC' in hex_common.attribdict[tag]):
f.write(" gen_log_predicated_reg_write(%s%sN, %s%sV,\n" % \
(regtype, regid, regtype, regid))
f.write(" insn->slot);\n")
else:
f.write(" gen_log_reg_write(%s%sN, %s%sV);\n" % \
(regtype, regid, regtype, regid))
f.write(" ctx_log_reg_write(ctx, %s%sN);\n" % \
(regtype, regid))
else:
print("Bad register parse: ", regtype, regid)
elif (regtype == "P"):
if (regid in {"d", "e", "x"}):
f.write(" gen_log_pred_write(ctx, %s%sN, %s%sV);\n" % \
(regtype, regid, regtype, regid))
f.write(" ctx_log_pred_write(ctx, %s%sN);\n" % \
(regtype, regid))
else:
print("Bad register parse: ", regtype, regid)
elif (regtype == "C"):
if (regid == "dd"):
f.write(" gen_write_ctrl_reg_pair(ctx, %s%sN, %s%sV);\n" % \
(regtype, regid, regtype, regid))
elif (regid == "d"):
f.write(" gen_write_ctrl_reg(ctx, %s%sN, %s%sV);\n" % \
(regtype, regid, regtype, regid))
else:
print("Bad register parse: ", regtype, regid)
else:
print("Bad register parse: ", regtype, regid)
def genptr_dst_write_ext(f, tag, regtype, regid, newv="EXT_DFL"):
if (regtype == "V"):
if (regid in {"dd", "xx", "yy"}):
if ('A_CONDEXEC' in hex_common.attribdict[tag]):
is_predicated = "true"
else:
is_predicated = "false"
f.write(" gen_log_vreg_write_pair(ctx, %s%sV_off, %s%sN, " % \
(regtype, regid, regtype, regid))
f.write("%s, insn->slot, %s);\n" % \
(newv, is_predicated))
f.write(" ctx_log_vreg_write_pair(ctx, %s%sN, %s,\n" % \
(regtype, regid, newv))
f.write(" %s);\n" % (is_predicated))
elif (regid in {"d", "x", "y"}):
if ('A_CONDEXEC' in hex_common.attribdict[tag]):
is_predicated = "true"
else:
is_predicated = "false"
f.write(" gen_log_vreg_write(ctx, %s%sV_off, %s%sN, %s, " % \
(regtype, regid, regtype, regid, newv))
f.write("insn->slot, %s);\n" % \
(is_predicated))
f.write(" ctx_log_vreg_write(ctx, %s%sN, %s, %s);\n" % \
(regtype, regid, newv, is_predicated))
else:
print("Bad register parse: ", regtype, regid)
elif (regtype == "Q"):
if (regid in {"d", "e", "x"}):
if ('A_CONDEXEC' in hex_common.attribdict[tag]):
is_predicated = "true"
else:
is_predicated = "false"
f.write(" gen_log_qreg_write(%s%sV_off, %s%sN, %s, " % \
(regtype, regid, regtype, regid, newv))
f.write("insn->slot, %s);\n" % (is_predicated))
f.write(" ctx_log_qreg_write(ctx, %s%sN, %s);\n" % \
(regtype, regid, is_predicated))
else:
print("Bad register parse: ", regtype, regid)
else:
print("Bad register parse: ", regtype, regid)
def genptr_dst_write_opn(f,regtype, regid, tag):
if (hex_common.is_pair(regid)):
if (hex_common.is_hvx_reg(regtype)):
if (hex_common.is_tmp_result(tag)):
genptr_dst_write_ext(f, tag, regtype, regid, "EXT_TMP")
else:
genptr_dst_write_ext(f, tag, regtype, regid)
else:
genptr_dst_write(f, tag, regtype, regid)
elif (hex_common.is_single(regid)):
if (hex_common.is_hvx_reg(regtype)):
if (hex_common.is_new_result(tag)):
genptr_dst_write_ext(f, tag, regtype, regid, "EXT_NEW")
elif (hex_common.is_tmp_result(tag)):
genptr_dst_write_ext(f, tag, regtype, regid, "EXT_TMP")
else:
genptr_dst_write_ext(f, tag, regtype, regid, "EXT_DFL")
else:
genptr_dst_write(f, tag, regtype, regid)
else:
print("Bad register parse: ",regtype,regid,toss,numregs)
##
## Generate the TCG code to call the helper
## For A2_add: Rd32=add(Rs32,Rt32), { RdV=RsV+RtV;}
## We produce:
## static void generate_A2_add()
## CPUHexagonState *env
## DisasContext *ctx,
## Insn *insn,
## Packet *pkt)
## {
## TCGv RdV = tcg_temp_local_new();
## const int RdN = insn->regno[0];
## TCGv RsV = hex_gpr[insn->regno[1]];
## TCGv RtV = hex_gpr[insn->regno[2]];
## <GEN>
## gen_log_reg_write(RdN, RdV);
## ctx_log_reg_write(ctx, RdN);
## tcg_temp_free(RdV);
## }
##
## where <GEN> depends on hex_common.skip_qemu_helper(tag)
## if hex_common.skip_qemu_helper(tag) is True
## <GEN> is fGEN_TCG_A2_add({ RdV=RsV+RtV;});
## if hex_common.skip_qemu_helper(tag) is False
## <GEN> is gen_helper_A2_add(RdV, cpu_env, RsV, RtV);
##
def gen_tcg_func(f, tag, regs, imms):
f.write("static void generate_%s(\n" %tag)
f.write(" CPUHexagonState *env,\n")
f.write(" DisasContext *ctx,\n")
f.write(" Insn *insn,\n")
f.write(" Packet *pkt)\n")
f.write('{\n')
if hex_common.need_ea(tag): gen_decl_ea_tcg(f, tag)
i=0
## Declare all the operands (regs and immediates)
for regtype,regid,toss,numregs in regs:
genptr_decl_opn(f, tag, regtype, regid, toss, numregs, i)
i += 1
for immlett,bits,immshift in imms:
genptr_decl_imm(f,immlett)
if 'A_PRIV' in hex_common.attribdict[tag]:
f.write(' fCHECKFORPRIV();\n')
if 'A_GUEST' in hex_common.attribdict[tag]:
f.write(' fCHECKFORGUEST();\n')
## Read all the inputs
for regtype,regid,toss,numregs in regs:
if (hex_common.is_read(regid)):
genptr_src_read_opn(f,regtype,regid,tag)
if ( hex_common.skip_qemu_helper(tag) ):
f.write(" fGEN_TCG_%s(%s);\n" % (tag, hex_common.semdict[tag]))
else:
## Generate the call to the helper
for immlett,bits,immshift in imms:
gen_helper_decl_imm(f,immlett)
if hex_common.need_part1(tag):
f.write(" TCGv part1 = tcg_constant_tl(insn->part1);\n")
if hex_common.need_slot(tag):
f.write(" TCGv slot = tcg_constant_tl(insn->slot);\n")
f.write(" gen_helper_%s(" % (tag))
i=0
## If there is a scalar result, it is the return type
for regtype,regid,toss,numregs in regs:
if (hex_common.is_written(regid)):
if (hex_common.is_hvx_reg(regtype)):
continue
gen_helper_call_opn(f, tag, regtype, regid, toss, numregs, i)
i += 1
if (i > 0): f.write(", ")
f.write("cpu_env")
i=1
for regtype,regid,toss,numregs in regs:
if (hex_common.is_written(regid)):
if (not hex_common.is_hvx_reg(regtype)):
continue
gen_helper_call_opn(f, tag, regtype, regid, toss, numregs, i)
i += 1
for regtype,regid,toss,numregs in regs:
if (hex_common.is_read(regid)):
if (hex_common.is_hvx_reg(regtype) and
hex_common.is_readwrite(regid)):
continue
gen_helper_call_opn(f, tag, regtype, regid, toss, numregs, i)
i += 1
for immlett,bits,immshift in imms:
gen_helper_call_imm(f,immlett)
if hex_common.need_slot(tag): f.write(", slot")
if hex_common.need_part1(tag): f.write(", part1" )
f.write(");\n")
## Write all the outputs
for regtype,regid,toss,numregs in regs:
if (hex_common.is_written(regid)):
genptr_dst_write_opn(f,regtype, regid, tag)
## Free all the operands (regs and immediates)
if hex_common.need_ea(tag): gen_free_ea_tcg(f)
for regtype,regid,toss,numregs in regs:
genptr_free_opn(f,regtype,regid,i,tag)
i += 1
f.write("}\n\n")
def gen_def_tcg_func(f, tag, tagregs, tagimms):
regs = tagregs[tag]
imms = tagimms[tag]
gen_tcg_func(f, tag, regs, imms)
def main():
hex_common.read_semantics_file(sys.argv[1])
hex_common.read_attribs_file(sys.argv[2])
hex_common.read_overrides_file(sys.argv[3])
hex_common.read_overrides_file(sys.argv[4])
hex_common.calculate_attribs()
tagregs = hex_common.get_tagregs()
tagimms = hex_common.get_tagimms()
with open(sys.argv[5], 'w') as f:
f.write("#ifndef HEXAGON_TCG_FUNCS_H\n")
f.write("#define HEXAGON_TCG_FUNCS_H\n\n")
for tag in hex_common.tags:
## Skip the priv instructions
if ( "A_PRIV" in hex_common.attribdict[tag] ) :
continue
## Skip the guest instructions
if ( "A_GUEST" in hex_common.attribdict[tag] ) :
continue
## Skip the diag instructions
if ( tag == "Y6_diag" ) :
continue
if ( tag == "Y6_diag0" ) :
continue
if ( tag == "Y6_diag1" ) :
continue
gen_def_tcg_func(f, tag, tagregs, tagimms)
f.write("#endif /* HEXAGON_TCG_FUNCS_H */\n")
if __name__ == "__main__":
main()
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