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Hexagon (target/hexagon) generator phase 3 - C preprocessor for decode tree 

Run the C preprocessor across the instruction definition and encoding
files to expand macros and prepare the iset.py file.  The resulting
fill contains python data structures used to build the decode tree.

Signed-off-by: Taylor Simpson <tsimpson@quicinc.com>
Reviewed-by: Philippe Mathieu-Daudé <f4bug@amsat.org>
Reviewed-by: Richard Henderson <richard.henderson@linaro.org>
Message-Id: <1612763186-18161-22-git-send-email-tsimpson@quicinc.com>
Signed-off-by: Richard Henderson <richard.henderson@linaro.org>
This commit is contained in:
Taylor Simpson 2021-02-07 23:46:11 -06:00 committed by Richard Henderson
parent 793958c93a
commit ece6cd1e42
1 changed files with 188 additions and 0 deletions
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188
target/hexagon/gen_dectree_import.c Normal file
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/*
* Copyright(c) 2019-2021 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/>.
*/
/*
* This program generates the encodings file that is processed by
* the dectree.py script to produce the decoding tree. We use the C
* preprocessor to manipulate the files imported from the Hexagon
* architecture library.
*/
#include <stdio.h>
#include <string.h>
#include "opcodes.h"
#define STRINGIZE(X) #X
const char * const opcode_names[] = {
#define OPCODE(IID) STRINGIZE(IID)
#include "opcodes_def_generated.h.inc"
NULL
#undef OPCODE
};
/*
* Process the instruction definitions
* Scalar core instructions have the following form
* Q6INSN(A2_add,"Rd32=add(Rs32,Rt32)",ATTRIBS(),
* "Add 32-bit registers",
* { RdV=RsV+RtV;})
*/
const char * const opcode_syntax[XX_LAST_OPCODE] = {
#define Q6INSN(TAG, BEH, ATTRIBS, DESCR, SEM) \
[TAG] = BEH,
#define EXTINSN(TAG, BEH, ATTRIBS, DESCR, SEM) \
[TAG] = BEH,
#include "imported/allidefs.def"
#undef Q6INSN
#undef EXTINSN
};
const char * const opcode_rregs[] = {
#define REGINFO(TAG, REGINFO, RREGS, WREGS) RREGS,
#define IMMINFO(TAG, SIGN, SIZE, SHAMT, SIGN2, SIZE2, SHAMT2) /* nothing */
#include "op_regs_generated.h.inc"
NULL
#undef REGINFO
#undef IMMINFO
};
const char * const opcode_wregs[] = {
#define REGINFO(TAG, REGINFO, RREGS, WREGS) WREGS,
#define IMMINFO(TAG, SIGN, SIZE, SHAMT, SIGN2, SIZE2, SHAMT2) /* nothing */
#include "op_regs_generated.h.inc"
NULL
#undef REGINFO
#undef IMMINFO
};
const OpcodeEncoding opcode_encodings[] = {
#define DEF_ENC32(TAG, ENCSTR) \
[TAG] = { .encoding = ENCSTR },
#define DEF_ENC_SUBINSN(TAG, CLASS, ENCSTR) \
[TAG] = { .encoding = ENCSTR, .enc_class = CLASS },
#define DEF_EXT_ENC(TAG, CLASS, ENCSTR) \
[TAG] = { .encoding = ENCSTR, .enc_class = CLASS },
#include "imported/encode.def"
#undef DEF_ENC32
#undef DEF_ENC_SUBINSN
#undef DEF_EXT_ENC
};
static const char * const opcode_enc_class_names[XX_LAST_ENC_CLASS] = {
"NORMAL",
"16BIT",
"SUBINSN_A",
"SUBINSN_L1",
"SUBINSN_L2",
"SUBINSN_S1",
"SUBINSN_S2",
"EXT_noext",
"EXT_mmvec",
};
static const char *get_opcode_enc(int opcode)
{
const char *tmp = opcode_encodings[opcode].encoding;
if (tmp == NULL) {
tmp = "MISSING ENCODING";
}
return tmp;
}
static const char *get_opcode_enc_class(int opcode)
{
return opcode_enc_class_names[opcode_encodings[opcode].enc_class];
}
static void gen_iset_table(FILE *out)
{
int i;
fprintf(out, "iset = {\n");
for (i = 0; i < XX_LAST_OPCODE; i++) {
fprintf(out, "\t\'%s\' : {\n", opcode_names[i]);
fprintf(out, "\t\t\'tag\' : \'%s\',\n", opcode_names[i]);
fprintf(out, "\t\t\'syntax\' : \'%s\',\n", opcode_syntax[i]);
fprintf(out, "\t\t\'rregs\' : \'%s\',\n", opcode_rregs[i]);
fprintf(out, "\t\t\'wregs\' : \'%s\',\n", opcode_wregs[i]);
fprintf(out, "\t\t\'enc\' : \'%s\',\n", get_opcode_enc(i));
fprintf(out, "\t\t\'enc_class\' : \'%s\',\n", get_opcode_enc_class(i));
fprintf(out, "\t},\n");
}
fprintf(out, "};\n\n");
}
static void gen_tags_list(FILE *out)
{
int i;
fprintf(out, "tags = [\n");
for (i = 0; i < XX_LAST_OPCODE; i++) {
fprintf(out, "\t\'%s\',\n", opcode_names[i]);
}
fprintf(out, "];\n\n");
}
static void gen_enc_ext_spaces_table(FILE *out)
{
fprintf(out, "enc_ext_spaces = {\n");
#define DEF_EXT_SPACE(SPACEID, ENCSTR) \
fprintf(out, "\t\'%s\' : \'%s\',\n", #SPACEID, ENCSTR);
#include "imported/encode.def"
#undef DEF_EXT_SPACE
fprintf(out, "};\n\n");
}
static void gen_subinsn_groupings_table(FILE *out)
{
fprintf(out, "subinsn_groupings = {\n");
#define DEF_PACKED32(TAG, TYPEA, TYPEB, ENCSTR) \
do { \
fprintf(out, "\t\'%s\' : {\n", #TAG); \
fprintf(out, "\t\t\'name\' : \'%s\',\n", #TAG); \
fprintf(out, "\t\t\'class_a\' : \'%s\',\n", #TYPEA); \
fprintf(out, "\t\t\'class_b\' : \'%s\',\n", #TYPEB); \
fprintf(out, "\t\t\'enc\' : \'%s\',\n", ENCSTR); \
fprintf(out, "\t},\n"); \
} while (0);
#include "imported/encode.def"
#undef DEF_PACKED32
fprintf(out, "};\n\n");
}
int main(int argc, char *argv[])
{
FILE *outfile;
if (argc != 2) {
fprintf(stderr, "Usage: gen_dectree_import ouptputfile\n");
return 1;
}
outfile = fopen(argv[1], "w");
if (outfile == NULL) {
fprintf(stderr, "Cannot open %s for writing\n", argv[1]);
return 1;
}
gen_iset_table(outfile);
gen_tags_list(outfile);
gen_enc_ext_spaces_table(outfile);
gen_subinsn_groupings_table(outfile);
fclose(outfile);
return 0;
}