target/hexagon: call idef-parser functions

Extend gen_tcg_funcs.py in order to emit calls to the functions emitted
by the idef-parser, if available.

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: <20220923173831.227551-11-anjo@rev.ng>

5 files changed, 154 insertions, 34 deletions

diff --git a/target/hexagon/gen_helper_funcs.py b/target/hexagon/gen_helper_funcs.py
index 00ee58f..19e9883 100755
--- a/target/hexagon/gen_helper_funcs.py
+++ b/target/hexagon/gen_helper_funcs.py
@@ -298,11 +298,24 @@ def main():
     hex_common.read_attribs_file(sys.argv[2])
     hex_common.read_overrides_file(sys.argv[3])
     hex_common.read_overrides_file(sys.argv[4])
+    ## Whether or not idef-parser is enabled is
+    ## determined by the number of arguments to
+    ## this script:
+    ##
+    ##   5 args. -> not enabled,
+    ##   6 args. -> idef-parser enabled.
+    ##
+    ## The 6:th arg. then holds a list of the successfully
+    ## parsed instructions.
+    is_idef_parser_enabled = len(sys.argv) > 6
+    if is_idef_parser_enabled:
+        hex_common.read_idef_parser_enabled_file(sys.argv[5])
     hex_common.calculate_attribs()
     tagregs = hex_common.get_tagregs()
     tagimms = hex_common.get_tagimms()
 
-    with open(sys.argv[5], 'w') as f:
+    output_file = sys.argv[-1]
+    with open(output_file, 'w') as f:
         for tag in hex_common.tags:
             ## Skip the priv instructions
             if ( "A_PRIV" in hex_common.attribdict[tag] ) :
@@ -319,6 +332,8 @@ def main():
                 continue
             if ( hex_common.skip_qemu_helper(tag) ):
                 continue
+            if ( hex_common.is_idef_parser_enabled(tag) ):
+                continue
 
             gen_helper_function(f, tag, tagregs, tagimms)
 
diff --git a/target/hexagon/gen_helper_protos.py b/target/hexagon/gen_helper_protos.py
index ed4b9cf..674bf37 100755
--- a/target/hexagon/gen_helper_protos.py
+++ b/target/hexagon/gen_helper_protos.py
@@ -146,11 +146,24 @@ def main():
     hex_common.read_attribs_file(sys.argv[2])
     hex_common.read_overrides_file(sys.argv[3])
     hex_common.read_overrides_file(sys.argv[4])
+    ## Whether or not idef-parser is enabled is
+    ## determined by the number of arguments to
+    ## this script:
+    ##
+    ##   5 args. -> not enabled,
+    ##   6 args. -> idef-parser enabled.
+    ##
+    ## The 6:th arg. then holds a list of the successfully
+    ## parsed instructions.
+    is_idef_parser_enabled = len(sys.argv) > 6
+    if is_idef_parser_enabled:
+        hex_common.read_idef_parser_enabled_file(sys.argv[5])
     hex_common.calculate_attribs()
     tagregs = hex_common.get_tagregs()
     tagimms = hex_common.get_tagimms()
 
-    with open(sys.argv[5], 'w') as f:
+    output_file = sys.argv[-1]
+    with open(output_file, 'w') as f:
         for tag in hex_common.tags:
             ## Skip the priv instructions
             if ( "A_PRIV" in hex_common.attribdict[tag] ) :
@@ -168,6 +181,8 @@ def main():
 
             if ( hex_common.skip_qemu_helper(tag) ):
                 continue
+            if ( hex_common.is_idef_parser_enabled(tag) ):
+                continue
 
             gen_helper_prototype(f, tag, tagregs, tagimms)
 
diff --git a/target/hexagon/gen_tcg_funcs.py b/target/hexagon/gen_tcg_funcs.py
index f4cea6d..7e8ba17 100755
--- a/target/hexagon/gen_tcg_funcs.py
+++ b/target/hexagon/gen_tcg_funcs.py
@@ -616,7 +616,29 @@ def gen_tcg_func(f, tag, regs, imms):
         if (hex_common.is_read(regid)):
             genptr_src_read_opn(f,regtype,regid,tag)
 
-    if ( hex_common.skip_qemu_helper(tag) ):
+    if hex_common.is_idef_parser_enabled(tag):
+        declared = []
+        ## Handle registers
+        for regtype,regid,toss,numregs in regs:
+            if (hex_common.is_pair(regid)
+                or (hex_common.is_single(regid)
+                    and hex_common.is_old_val(regtype, regid, tag))):
+                declared.append("%s%sV" % (regtype, regid))
+                if regtype == "M":
+                    declared.append("%s%sN" % (regtype, regid))
+            elif hex_common.is_new_val(regtype, regid, tag):
+                declared.append("%s%sN" % (regtype,regid))
+            else:
+                print("Bad register parse: ",regtype,regid,toss,numregs)
+
+        ## Handle immediates
+        for immlett,bits,immshift in imms:
+            declared.append(hex_common.imm_name(immlett))
+
+        arguments = ", ".join(["ctx", "ctx->insn", "ctx->pkt"] + declared)
+        f.write("    emit_%s(%s);\n" % (tag, arguments))
+
+    elif ( 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
@@ -694,12 +716,27 @@ def main():
     hex_common.read_overrides_file(sys.argv[3])
     hex_common.read_overrides_file(sys.argv[4])
     hex_common.calculate_attribs()
+    ## Whether or not idef-parser is enabled is
+    ## determined by the number of arguments to
+    ## this script:
+    ##
+    ##   5 args. -> not enabled,
+    ##   6 args. -> idef-parser enabled.
+    ##
+    ## The 6:th arg. then holds a list of the successfully
+    ## parsed instructions.
+    is_idef_parser_enabled = len(sys.argv) > 6
+    if is_idef_parser_enabled:
+        hex_common.read_idef_parser_enabled_file(sys.argv[5])
     tagregs = hex_common.get_tagregs()
     tagimms = hex_common.get_tagimms()
 
-    with open(sys.argv[5], 'w') as f:
+    output_file = sys.argv[-1]
+    with open(output_file, 'w') as f:
         f.write("#ifndef HEXAGON_TCG_FUNCS_H\n")
         f.write("#define HEXAGON_TCG_FUNCS_H\n\n")
+        if is_idef_parser_enabled:
+            f.write("#include \"idef-generated-emitter.h.inc\"\n\n")
 
         for tag in hex_common.tags:
             ## Skip the priv instructions
diff --git a/target/hexagon/hex_common.py b/target/hexagon/hex_common.py
index 8e631b4..a29f61b 100755
--- a/target/hexagon/hex_common.py
+++ b/target/hexagon/hex_common.py
@@ -28,6 +28,7 @@ macros = {}           # macro -> macro information...
 attribinfo = {}       # Register information and misc
 tags = []             # list of all tags
 overrides = {}        # tags with helper overrides
+idef_parser_enabled = {} # tags enabled for idef-parser
 
 # We should do this as a hash for performance,
 # but to keep order let's keep it as a list.
@@ -245,6 +246,9 @@ def is_tmp_result(tag):
 def is_new_result(tag):
     return ('A_CVI_NEW' in attribdict[tag])
 
+def is_idef_parser_enabled(tag):
+    return tag in idef_parser_enabled
+
 def imm_name(immlett):
     return "%siV" % immlett
 
@@ -276,3 +280,9 @@ def read_overrides_file(name):
             continue
         tag = overridere.findall(line)[0]
         overrides[tag] = True
+
+def read_idef_parser_enabled_file(name):
+    global idef_parser_enabled
+    with open(name, "r") as idef_parser_enabled_file:
+        lines = idef_parser_enabled_file.read().strip().split("\n")
+        idef_parser_enabled = set(lines)
diff --git a/target/hexagon/meson.build b/target/hexagon/meson.build
index d782041..e8f250f 100644
--- a/target/hexagon/meson.build
+++ b/target/hexagon/meson.build
@@ -43,10 +43,7 @@ hexagon_ss.add(semantics_generated)
 # Step 2
 # We use Python scripts to generate the following files
 #     shortcode_generated.h.inc
-#     helper_protos_generated.h.inc
-#     tcg_funcs_generated.c.inc
 #     tcg_func_table_generated.c.inc
-#     helper_funcs_generated.c.inc
 #     printinsn_generated.h.inc
 #     op_regs_generated.h.inc
 #     op_attribs_generated.h.inc
@@ -61,24 +58,6 @@ shortcode_generated = custom_target(
 )
 hexagon_ss.add(shortcode_generated)
 
-helper_protos_generated = custom_target(
-    'helper_protos_generated.h.inc',
-    output: 'helper_protos_generated.h.inc',
-    depends: [semantics_generated],
-    depend_files: [hex_common_py, attribs_def, gen_tcg_h, gen_tcg_hvx_h],
-    command: [python, files('gen_helper_protos.py'), semantics_generated, attribs_def, gen_tcg_h, gen_tcg_hvx_h, '@OUTPUT@'],
-)
-hexagon_ss.add(helper_protos_generated)
-
-tcg_funcs_generated = custom_target(
-    'tcg_funcs_generated.c.inc',
-    output: 'tcg_funcs_generated.c.inc',
-    depends: [semantics_generated],
-    depend_files: [hex_common_py, attribs_def, gen_tcg_h, gen_tcg_hvx_h],
-    command: [python, files('gen_tcg_funcs.py'), semantics_generated, attribs_def, gen_tcg_h, gen_tcg_hvx_h, '@OUTPUT@'],
-)
-hexagon_ss.add(tcg_funcs_generated)
-
 tcg_func_table_generated = custom_target(
     'tcg_func_table_generated.c.inc',
     output: 'tcg_func_table_generated.c.inc',
@@ -88,15 +67,6 @@ tcg_func_table_generated = custom_target(
 )
 hexagon_ss.add(tcg_func_table_generated)
 
-helper_funcs_generated = custom_target(
-    'helper_funcs_generated.c.inc',
-    output: 'helper_funcs_generated.c.inc',
-    depends: [semantics_generated],
-    depend_files: [hex_common_py, attribs_def, gen_tcg_h, gen_tcg_hvx_h],
-    command: [python, files('gen_helper_funcs.py'), semantics_generated, attribs_def, gen_tcg_h, gen_tcg_hvx_h, '@OUTPUT@'],
-)
-hexagon_ss.add(helper_funcs_generated)
-
 printinsn_generated = custom_target(
     'printinsn_generated.h.inc',
     output: 'printinsn_generated.h.inc',
@@ -180,6 +150,14 @@ hexagon_ss.add(files(
     'mmvec/system_ext_mmvec.c',
 ))
 
+#
+# Step 4.5
+# We use flex/bison based idef-parser to generate TCG code for a lot
+# of instructions. idef-parser outputs
+#     idef-generated-emitter.c
+#     idef-generated-emitter.h.inc
+#     idef-generated-enabled-instructions
+#
 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(
@@ -232,6 +210,71 @@ if idef_parser_enabled and 'hexagon-linux-user' in target_dirs
         depend_files: [hex_common_py],
         command: [idef_parser, '@INPUT@', '@OUTPUT0@', '@OUTPUT1@', '@OUTPUT2@']
     )
+
+    indent = find_program('indent', required: false)
+    if indent.found()
+        idef_generated_tcg_c = custom_target(
+            'indent',
+            input: idef_generated_tcg[0],
+            output: 'idef-generated-emitter.indented.c',
+            command: [indent, '-linux', '@INPUT@', '-o', '@OUTPUT@']
+        )
+    else
+        idef_generated_tcg_c = custom_target(
+            'copy',
+            input: idef_generated_tcg[0],
+            output: 'idef-generated-emitter.indented.c',
+            command: ['cp', '@INPUT@', '@OUTPUT@']
+        )
+    endif
+
+    idef_generated_list = idef_generated_tcg[2].full_path()
+
+    hexagon_ss.add(idef_generated_tcg_c)
+
+    # Setup input and dependencies for the next step, this depends on whether or
+    # not idef-parser is enabled
+    helper_dep = [semantics_generated, idef_generated_tcg_c, idef_generated_tcg]
+    helper_in = [semantics_generated, attribs_def, gen_tcg_h, gen_tcg_hvx_h, idef_generated_list]
+else
+    # Setup input and dependencies for the next step, this depends on whether or
+    # not idef-parser is enabled
+    helper_dep = [semantics_generated]
+    helper_in = [semantics_generated, attribs_def, gen_tcg_h, gen_tcg_hvx_h]
 endif
 
+#
+# Step 5
+# We use Python scripts to generate the following files
+#     helper_protos_generated.h.inc
+#     helper_funcs_generated.c.inc
+#     tcg_funcs_generated.c.inc
+#
+helper_protos_generated = custom_target(
+    'helper_protos_generated.h.inc',
+    output: 'helper_protos_generated.h.inc',
+    depends: helper_dep,
+    depend_files: [hex_common_py, attribs_def, gen_tcg_h, gen_tcg_hvx_h],
+    command: [python, files('gen_helper_protos.py'), helper_in, '@OUTPUT@'],
+)
+hexagon_ss.add(helper_protos_generated)
+
+helper_funcs_generated = custom_target(
+    'helper_funcs_generated.c.inc',
+    output: 'helper_funcs_generated.c.inc',
+    depends: helper_dep,
+    depend_files: [hex_common_py, attribs_def, gen_tcg_h, gen_tcg_hvx_h],
+    command: [python, files('gen_helper_funcs.py'), helper_in, '@OUTPUT@'],
+)
+hexagon_ss.add(helper_funcs_generated)
+
+tcg_funcs_generated = custom_target(
+    'tcg_funcs_generated.c.inc',
+    output: 'tcg_funcs_generated.c.inc',
+    depends: helper_dep,
+    depend_files: [hex_common_py, attribs_def, gen_tcg_h, gen_tcg_hvx_h],
+    command: [python, files('gen_tcg_funcs.py'), helper_in, '@OUTPUT@'],
+)
+hexagon_ss.add(tcg_funcs_generated)
+
 target_arch += {'hexagon': hexagon_ss}