Hexagon (target/hexagon) generator phase 2 - generate header files

Python scripts generate the following files
    helper_protos_generated.h.inc
        For each instruction we create DEF_HELPER function prototype
    helper_funcs_generated.c.inc
        For each instruction we create the helper function definition
    tcg_funcs_generated.c.inc
        For each instruction we create TCG code to generate call to helper
    tcg_func_table_generated.c.inc
        Table of function pointers indexed by opcode
    shortcode_generated.h.inc
        Generate a table of instruction "shortcode" semantics
    opcodes_def_generated.h.inc
        Gives a list of all the opcodes
    op_attribs_generated.h.inc
        Lists all the attributes associated with each instruction
    op_regs_generated.h.inc
        Lists the register and immediate operands for each instruction
    printinsn_generated.h.inc
        Data for printing (disassembling) each instruction (format
        string + operands)

Signed-off-by: Taylor Simpson <tsimpson@quicinc.com>
Reviewed-by: Richard Henderson <richard.henderson@linaro.org>
Message-Id: <1612763186-18161-21-git-send-email-tsimpson@quicinc.com>
Signed-off-by: Richard Henderson <richard.henderson@linaro.org>

1 files changed, 110 insertions, 0 deletions

diff --git a/target/hexagon/gen_op_regs.py b/target/hexagon/gen_op_regs.py
new file mode 100755
index 0000000000..e8137d4a12
--- /dev/null
+++ b/target/hexagon/gen_op_regs.py
@@ -0,0 +1,110 @@
+#!/usr/bin/env python3
+
+##
+##  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/>.
+##
+
+import sys
+import re
+import string
+import hex_common
+
+##
+##     Generate the register and immediate operands for each instruction
+##
+def calculate_regid_reg(tag):
+    def letter_inc(x): return chr(ord(x)+1)
+    ordered_implregs = [ 'SP','FP','LR' ]
+    srcdst_lett = 'X'
+    src_lett = 'S'
+    dst_lett = 'D'
+    retstr = ""
+    mapdict = {}
+    for reg in ordered_implregs:
+        reg_rd = 0
+        reg_wr = 0
+        if ('A_IMPLICIT_WRITES_'+reg) in hex_common.attribdict[tag]: reg_wr = 1
+        if reg_rd and reg_wr:
+            retstr += srcdst_lett
+            mapdict[srcdst_lett] = reg
+            srcdst_lett = letter_inc(srcdst_lett)
+        elif reg_rd:
+            retstr += src_lett
+            mapdict[src_lett] = reg
+            src_lett = letter_inc(src_lett)
+        elif reg_wr:
+            retstr += dst_lett
+            mapdict[dst_lett] = reg
+            dst_lett = letter_inc(dst_lett)
+    return retstr,mapdict
+
+def calculate_regid_letters(tag):
+    retstr,mapdict = calculate_regid_reg(tag)
+    return retstr
+
+def strip_reg_prefix(x):
+    y=x.replace('UREG.','')
+    y=y.replace('MREG.','')
+    return y.replace('GREG.','')
+
+def main():
+    hex_common.read_semantics_file(sys.argv[1])
+    hex_common.read_attribs_file(sys.argv[2])
+    tagregs = hex_common.get_tagregs()
+    tagimms = hex_common.get_tagimms()
+
+    with open(sys.argv[3], 'w') as f:
+        for tag in hex_common.tags:
+            regs = tagregs[tag]
+            rregs = []
+            wregs = []
+            regids = ""
+            for regtype,regid,toss,numregs in regs:
+                if hex_common.is_read(regid):
+                    if regid[0] not in regids: regids += regid[0]
+                    rregs.append(regtype+regid+numregs)
+                if hex_common.is_written(regid):
+                    wregs.append(regtype+regid+numregs)
+                    if regid[0] not in regids: regids += regid[0]
+            for attrib in hex_common.attribdict[tag]:
+                if hex_common.attribinfo[attrib]['rreg']:
+                    rregs.append(strip_reg_prefix(attribinfo[attrib]['rreg']))
+                if hex_common.attribinfo[attrib]['wreg']:
+                    wregs.append(strip_reg_prefix(attribinfo[attrib]['wreg']))
+            regids += calculate_regid_letters(tag)
+            f.write('REGINFO(%s,"%s",\t/*RD:*/\t"%s",\t/*WR:*/\t"%s")\n' % \
+                (tag,regids,",".join(rregs),",".join(wregs)))
+
+        for tag in hex_common.tags:
+            imms = tagimms[tag]
+            f.write( 'IMMINFO(%s' % tag)
+            if not imms:
+                f.write(''','u',0,0,'U',0,0''')
+            for sign,size,shamt in imms:
+                if sign == 'r': sign = 's'
+                if not shamt:
+                    shamt = "0"
+                f.write(''','%s',%s,%s''' % (sign,size,shamt))
+            if len(imms) == 1:
+                if sign.isupper():
+                    myu = 'u'
+                else:
+                    myu = 'U'
+                f.write(''','%s',0,0''' % myu)
+            f.write(')\n')
+
+if __name__ == "__main__":
+    main()