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target/hexagon: prepare input for the idef-parser

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Introduce infrastructure necessary to produce a file suitable for being
parsed by the idef-parser. A build option is also added to fully disable
the output of idef-parser, which is useful for debugging.

Signed-off-by: Alessandro Di Federico <ale@rev.ng>
Signed-off-by: Anton Johansson <anjo@rev.ng>
Signed-off-by: Taylor Simpson <tsimpson@quicinc.com>
Reviewed-by: Taylor Simpson <tsimpson@quicinc.com>
Message-Id: <20220923173831.227551-8-anjo@rev.ng>
This commit is contained in:
Alessandro Di Federico 2022-09-23 19:38:27 +02:00 committed by Taylor Simpson
parent 42659e046f
commit 7c19dcc564
5 changed files with 317 additions and 0 deletions
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3
meson_options.txt
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@ -321,3 +321,6 @@ option('profiler', type: 'boolean', value: false,
description: 'profiler support')
option('slirp_smbd', type : 'feature', value : 'auto',
description: 'use smbd (at path --smbd=*) in slirp networking')
option('hexagon_idef_parser', type : 'boolean', value : true,
description: 'use idef-parser to automatically generate TCG code for the Hexagon frontend')

130
target/hexagon/gen_idef_parser_funcs.py Normal file
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@ -0,0 +1,130 @@
#!/usr/bin/env python3
##
## Copyright(c) 2019-2022 rev.ng Labs Srl. 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
from io import StringIO
import hex_common
##
## Generate code to be fed to the idef_parser
##
## Consider A2_add:
##
## Rd32=add(Rs32,Rt32), { RdV=RsV+RtV;}
##
## We produce:
##
## A2_add(RdV, in RsV, in RtV) {
## { RdV=RsV+RtV;}
## }
##
## A2_add represents the instruction tag. Then we have a list of TCGv
## that the code generated by the parser can expect in input. Some of
## them are inputs ("in" prefix), while some others are outputs.
##
def main():
hex_common.read_semantics_file(sys.argv[1])
hex_common.read_attribs_file(sys.argv[2])
hex_common.calculate_attribs()
tagregs = hex_common.get_tagregs()
tagimms = hex_common.get_tagimms()
with open(sys.argv[3], 'w') as f:
f.write('#include "macros.inc"\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 instructions that saturate in a ternary expression
if ( tag in {'S2_asr_r_r_sat', 'S2_asl_r_r_sat'} ) :
continue
## Skip instructions using switch
if ( tag in {'S4_vrcrotate_acc', 'S4_vrcrotate'} ) :
continue
## Skip trap instructions
if ( tag in {'J2_trap0', 'J2_trap1'} ) :
continue
## Skip 128-bit instructions
if ( tag in {'A7_croundd_ri', 'A7_croundd_rr'} ) :
continue
if ( tag in {'M7_wcmpyrw', 'M7_wcmpyrwc',
'M7_wcmpyiw', 'M7_wcmpyiwc',
'M7_wcmpyrw_rnd', 'M7_wcmpyrwc_rnd',
'M7_wcmpyiw_rnd', 'M7_wcmpyiwc_rnd'} ) :
continue
## Skip interleave/deinterleave instructions
if ( tag in {'S2_interleave', 'S2_deinterleave'} ) :
continue
## Skip instructions using bit reverse
if ( tag in {'S2_brev', 'S2_brevp', 'S2_ct0', 'S2_ct1',
'S2_ct0p', 'S2_ct1p', 'A4_tlbmatch'} ) :
continue
## Skip other unsupported instructions
if ( tag == 'S2_cabacdecbin' or tag == 'A5_ACS' ) :
continue
if ( tag.startswith('Y') ) :
continue
if ( tag.startswith('V6_') ) :
continue
if ( tag.startswith('F') ) :
continue
if ( tag.endswith('_locked') ) :
continue
if ( "A_COF" in hex_common.attribdict[tag] ) :
continue
regs = tagregs[tag]
imms = tagimms[tag]
arguments = []
for regtype,regid,toss,numregs in regs:
prefix = "in " if hex_common.is_read(regid) else ""
is_pair = hex_common.is_pair(regid)
is_single_old = (hex_common.is_single(regid)
and hex_common.is_old_val(regtype, regid, tag))
is_single_new = (hex_common.is_single(regid)
and hex_common.is_new_val(regtype, regid, tag))
if is_pair or is_single_old:
arguments.append("%s%s%sV" % (prefix, regtype, regid))
elif is_single_new:
arguments.append("%s%s%sN" % (prefix, regtype, regid))
else:
print("Bad register parse: ",regtype,regid,toss,numregs)
for immlett,bits,immshift in imms:
arguments.append(hex_common.imm_name(immlett))
f.write("%s(%s) {\n" % (tag, ", ".join(arguments)))
f.write(" ");
if hex_common.need_ea(tag):
f.write("size4u_t EA; ");
f.write("%s\n" % hex_common.semdict[tag])
f.write("}\n\n")
if __name__ == "__main__":
main()

140
target/hexagon/idef-parser/macros.inc Normal file
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@ -0,0 +1,140 @@
/*
* Copyright(c) 2019-2022 rev.ng Labs Srl. 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/>.
*/
/* Copy rules */
#define fLSBOLD(VAL) (fGETBIT(0, VAL))
#define fSATH(VAL) fSATN(16, VAL)
#define fSATUH(VAL) fSATUN(16, VAL)
#define fVSATH(VAL) fVSATN(16, VAL)
#define fVSATUH(VAL) fVSATUN(16, VAL)
#define fSATUB(VAL) fSATUN(8, VAL)
#define fSATB(VAL) fSATN(8, VAL)
#define fVSATUB(VAL) fVSATUN(8, VAL)
#define fVSATB(VAL) fVSATN(8, VAL)
#define fCALL(A) fWRITE_LR(fREAD_NPC()); fWRITE_NPC(A);
#define fCALLR(A) fWRITE_LR(fREAD_NPC()); fWRITE_NPC(A);
#define fCAST2_8s(A) fSXTN(16, 64, A)
#define fCAST2_8u(A) fZXTN(16, 64, A)
#define fVSATW(A) fVSATN(32, fCAST8_8s(A))
#define fSATW(A) fSATN(32, fCAST8_8s(A))
#define fVSAT(A) fVSATN(32, A)
#define fSAT(A) fSATN(32, A)
/* Ease parsing */
#define f8BITSOF(VAL) ((VAL) ? 0xff : 0x00)
#define fREAD_GP() (Constant_extended ? (0) : GP)
#define fCLIP(DST, SRC, U) (DST = fMIN((1 << U) - 1, fMAX(SRC, -(1 << U))))
#define fBIDIR_ASHIFTL(SRC, SHAMT, REGSTYPE) \
((SHAMT > 0) ? \
(fCAST##REGSTYPE##s(SRC) << SHAMT) : \
(fCAST##REGSTYPE##s(SRC) >> -SHAMT))
#define fBIDIR_LSHIFTL(SRC, SHAMT, REGSTYPE) \
((SHAMT > 0) ? \
(fCAST##REGSTYPE##u(SRC) << SHAMT) : \
(fCAST##REGSTYPE##u(SRC) >>> -SHAMT))
#define fBIDIR_ASHIFTR(SRC, SHAMT, REGSTYPE) \
((SHAMT > 0) ? \
(fCAST##REGSTYPE##s(SRC) >> SHAMT) : \
(fCAST##REGSTYPE##s(SRC) << -SHAMT))
#define fBIDIR_SHIFTR(SRC, SHAMT, REGSTYPE) \
(((SHAMT) < 0) ? ((fCAST##REGSTYPE(SRC) << ((-(SHAMT)) - 1)) << 1) \
: (fCAST##REGSTYPE(SRC) >> (SHAMT)))
#define fBIDIR_LSHIFTR(SRC, SHAMT, REGSTYPE) \
fBIDIR_SHIFTR(SRC, SHAMT, REGSTYPE##u)
#define fSATVALN(N, VAL) \
fSET_OVERFLOW( \
((VAL) < 0) ? (-(1LL << ((N) - 1))) : ((1LL << ((N) - 1)) - 1) \
)
#define fSAT_ORIG_SHL(A, ORIG_REG) \
(((fCAST4s((fSAT(A)) ^ (fCAST4s(ORIG_REG)))) < 0) \
? fSATVALN(32, (fCAST4s(ORIG_REG))) \
: ((((ORIG_REG) > 0) && ((A) == 0)) ? fSATVALN(32, (ORIG_REG)) \
: fSAT(A)))
#define fBIDIR_ASHIFTR_SAT(SRC, SHAMT, REGSTYPE) \
(((SHAMT) < 0) ? fSAT_ORIG_SHL((fCAST##REGSTYPE##s(SRC) \
<< ((-(SHAMT)) - 1)) << 1, (SRC)) \
: (fCAST##REGSTYPE##s(SRC) >> (SHAMT)))
#define fBIDIR_ASHIFTL_SAT(SRC, SHAMT, REGSTYPE) \
(((SHAMT) < 0) \
? ((fCAST##REGSTYPE##s(SRC) >> ((-(SHAMT)) - 1)) >> 1) \
: fSAT_ORIG_SHL(fCAST##REGSTYPE##s(SRC) << (SHAMT), (SRC)))
#define fEXTRACTU_BIDIR(INREG, WIDTH, OFFSET) \
(fZXTN(WIDTH, 32, fBIDIR_LSHIFTR((INREG), (OFFSET), 4_8)))
/* Least significant bit operations */
#define fLSBNEW0 fLSBNEW(P0N)
#define fLSBNEW1 fLSBNEW(P1N)
#define fLSBOLDNOT(VAL) fGETBIT(0, ~VAL)
#define fLSBNEWNOT(PRED) (fLSBNEW(~PRED))
#define fLSBNEW0NOT fLSBNEW(~P0N)
#define fLSBNEW1NOT fLSBNEW(~P1N)
/* Assignments */
#define fPCALIGN(IMM) (IMM = IMM & ~3)
#define fWRITE_LR(A) (LR = A)
#define fWRITE_FP(A) (FP = A)
#define fWRITE_SP(A) (SP = A)
/*
* Note: There is a rule in the parser that matches `PC = ...` and emits
* a call to `gen_write_new_pc`. We need to call `gen_write_new_pc` to
* get the correct semantics when there are multiple stores in a packet.
*/
#define fBRANCH(LOC, TYPE) (PC = LOC)
#define fJUMPR(REGNO, TARGET, TYPE) (PC = TARGET)
#define fWRITE_LOOP_REGS0(START, COUNT) SA0 = START; (LC0 = COUNT)
#define fWRITE_LOOP_REGS1(START, COUNT) SA1 = START; (LC1 = COUNT)
#define fWRITE_LC0(VAL) (LC0 = VAL)
#define fWRITE_LC1(VAL) (LC1 = VAL)
#define fSET_LPCFG(VAL) (USR.LPCFG = VAL)
#define fWRITE_P0(VAL) P0 = VAL;
#define fWRITE_P1(VAL) P1 = VAL;
#define fWRITE_P3(VAL) P3 = VAL;
#define fEA_RI(REG, IMM) (EA = REG + IMM)
#define fEA_RRs(REG, REG2, SCALE) (EA = REG + (REG2 << SCALE))
#define fEA_IRs(IMM, REG, SCALE) (EA = IMM + (REG << SCALE))
#define fEA_IMM(IMM) (EA = IMM)
#define fEA_REG(REG) (EA = REG)
#define fEA_BREVR(REG) (EA = fbrev(REG))
#define fEA_GPI(IMM) (EA = fREAD_GP() + IMM)
#define fPM_I(REG, IMM) (REG = REG + IMM)
#define fPM_M(REG, MVAL) (REG = REG + MVAL)
#define fWRITE_NPC(VAL) (PC = VAL)
/* Unary operators */
#define fROUND(A) (A + 0x8000)
/* Binary operators */
#define fSCALE(N, A) (A << N)
#define fASHIFTR(SRC, SHAMT, REGSTYPE) (fCAST##REGSTYPE##s(SRC) >> SHAMT)
#define fLSHIFTR(SRC, SHAMT, REGSTYPE) (SRC >>> SHAMT)
#define fROTL(SRC, SHAMT, REGSTYPE) fROTL(SRC, SHAMT)
#define fASHIFTL(SRC, SHAMT, REGSTYPE) (fCAST##REGSTYPE##s(SRC) << SHAMT)
/* Include fHIDE macros which hide type declarations */
#define fHIDE(A) A
/* Purge non-relavant parts */
#define fBRANCH_SPECULATE_STALL(A, B, C, D, E)

24
target/hexagon/idef-parser/prepare Executable file
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@ -0,0 +1,24 @@
#!/bin/bash
#
# Copyright(c) 2019-2021 rev.ng Labs Srl. 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/>.
#
set -e
set -o pipefail
# Run the preprocessor and drop comments
cpp "$@"

20
target/hexagon/meson.build
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@ -21,6 +21,7 @@ hex_common_py = 'hex_common.py'
attribs_def = meson.current_source_dir() / 'attribs_def.h.inc'
gen_tcg_h = meson.current_source_dir() / 'gen_tcg.h'
gen_tcg_hvx_h = meson.current_source_dir() / 'gen_tcg_hvx.h'
idef_parser_dir = meson.current_source_dir() / 'idef-parser'
#
# Step 1
@ -179,4 +180,23 @@ hexagon_ss.add(files(
'mmvec/system_ext_mmvec.c',
))
idef_parser_enabled = get_option('hexagon_idef_parser')
if idef_parser_enabled and 'hexagon-linux-user' in target_dirs
idef_parser_input_generated = custom_target(
'idef_parser_input.h.inc',
output: 'idef_parser_input.h.inc',
depends: [semantics_generated],
depend_files: [hex_common_py],
command: [python, files('gen_idef_parser_funcs.py'), semantics_generated, attribs_def, '@OUTPUT@'],
)
preprocessed_idef_parser_input_generated = custom_target(
'idef_parser_input.preprocessed.h.inc',
output: 'idef_parser_input.preprocessed.h.inc',
input: idef_parser_input_generated,
depend_files: [idef_parser_dir / 'macros.inc'],
command: [idef_parser_dir / 'prepare', '@INPUT@', '-I' + idef_parser_dir, '-o', '@OUTPUT@'],
)
endif
target_arch += {'hexagon': hexagon_ss}