Add X32 port into V8

tools/generate-x32-sources.py

Index: tools/generate-x32-sources.py
===================================================================
--- tools/generate-x32-sources.py	(revision 0)
+++ tools/generate-x32-sources.py	(revision 0)
@@ -0,0 +1,371 @@
+#!/usr/bin/env python
+#

[danno, 2013/07/17 13:33:21]

As discussed offline, this file shouldn't be added to the repository, instead
for now the entire x32 directory should be checked in as a completely separate
port and you should incrementally work on sharing more code with x64 going
forward and fixing the shared implementation to support the features you needs,
like either 31- or 32-bit smis.

+# Copyright 2012 the V8 project authors. All rights reserved.
+# Redistribution and use in source and binary forms, with or without
+# modification, are permitted provided that the following conditions are
+# met:
+#
+#     * Redistributions of source code must retain the above copyright
+#       notice, this list of conditions and the following disclaimer.
+#     * Redistributions in binary form must reproduce the above
+#       copyright notice, this list of conditions and the following
+#       disclaimer in the documentation and/or other materials provided
+#       with the distribution.
+#     * Neither the name of Google Inc. nor the names of its
+#       contributors may be used to endorse or promote products derived
+#       from this software without specific prior written permission.
+#
+# THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
+# "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
+# LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
+# A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
+# OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
+# SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
+# LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
+# DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
+# THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
+# (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
+# OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
+
+import sys
+import os
+
+# This script generates the x32 sources from annoated x64 codes.
+# <Usage>:
+#   ./generate-x32-source.py {debug|release} output_file_names input_file_names
+#
+# The annotations include:
+#   __a (argument) : Replace (n + 1) * kPointerSize with 1 * kHWRegSize +
+#                    n * kPointerSize and __a with __ or remove "__a ".
+#   The size of return address is kHWRegSize for X32, the current X64 codes
+#   assume return address size is kPointerSize, so we replace the argument
+#   access offset with the right value.
+#
+#   __k (keep) : Keep the current line unchanged and replace __k with __
+#                or remove "__k ".
+#   We need to use 64-bit instructions for X32 when:
+#     1) Load/Store 64-bit value.
+#     2) Load/Store double into heap number field
+#     3) Use push/pop for return address and FP register
+#     4) Get signed index register for SIB access
+#
+#   __q (quad) : Replace kPointerSize with kHWRegSize and __q with __
+#                or remove "__q ".
+#   We need to use quadword for X32 when:
+#     1) Pass arguments to the C++ runtime, we need 8-byte in the stack
+#         according to X32 ABI (https://sites.google.com/site/x32abi/)
+#     2) Access a stack slot when skipping return address or FP
+#     3) Compute size of state in the deoptimization process as we store state
+#        as quadword in the stack
+#
+#   __n : Replace RelocInfo::NONE64 with RelocInfo::NONE32.
+#
+#   __s (quad, keep) : Combine __k and __q. It is used when storing a register
+#     to the runtime stack for RegExp.
+#
+# After handling the annotations, if not __k or __s, the rest of the line will
+# be processed according to the operator_handlers (see below).
+
+argument_replacements = {
+  "1 * kPointerSize" : "1 * kHWRegSize",
+  "2 * kPointerSize" : "1 * kHWRegSize + 1 * kPointerSize",
+  "3 * kPointerSize" : "1 * kHWRegSize + 2 * kPointerSize",
+  "4 * kPointerSize" : "1 * kHWRegSize + 3 * kPointerSize",
+  "5 * kPointerSize" : "1 * kHWRegSize + 4 * kPointerSize",
+  "6 * kPointerSize" : "1 * kHWRegSize + 5 * kPointerSize",
+  "i * kPointerSize" : "1 * kHWRegSize + (i - 1) * kPointerSize",
+  "argc * kPointerSize" : "1 * kHWRegSize + (argc - 1) * kPointerSize",
+  "(argc - 0) * kPointerSize"  : "1 * kHWRegSize + (argc - 1) * kPointerSize",
+  "(argc + 1) * kPointerSize"  : "1 * kHWRegSize + argc * kPointerSize",
+  "(argc_ + 1) * kPointerSize" : "1 * kHWRegSize + argc_ * kPointerSize",
+}
+
+def HandleArgument(line):
+  result = line
+  if result.find("times_pointer_size, 0)") != -1:
+    result = result.replace("times_pointer_size, 0)", \
+                            "times_pointer_size, kPointerSize)")
+  else:
+    for argument in argument_replacements:
+      if result.find(argument) != -1:
+        result = result.replace(argument, argument_replacements[argument])
+        break
+
+  return (True, result)
+
+def HandleKeep(line):
+  return (False, line)
+
+def HandleQuad(line):
+  result = line
+  result = result.replace("kPointerSize", "kHWRegSize")
+  return (True, result)
+
+def HandleNone64(line):
+  result = line
+  result = result.replace("RelocInfo::NONE64", "RelocInfo::NONE32")
+  return (True, result)
+
+def HandleQuadKeep(line):
+  (cont, result) = HandleQuad(line)
+  return HandleKeep(result)
+
+annotation_handlers = {
+  " __a" : [" ", HandleArgument],
+  " __k" : [" ", HandleKeep],
+  " __q" : [" ", HandleQuad],
+  " __n" : [" ", HandleNone64],
+  " __s" : [" ", HandleQuadKeep],
+}
+
+def Replace(line, key):
+  return line.replace(key, operator_handlers[key][0])
+
+def HandlePushPop(line, key):
+  if line.find("push(rbp)") == -1 and line.find("pop(rbp)") == -1:
+    return Replace(line, key)
+  else:
+    return line
+
+def HandleMovQ(line, key):
+  result = line
+  if result.find("xmm") == -1 and result.find("double_scratch") == -1 and \
+     result.find("V8_UINT64_C") == -1 and result.find("V8_INT64_C") == -1:
+    result = Replace(result, key)
+    if result.find("kZapValue") != -1 and result.find("NONE64") != -1:
+      result = result.replace("int64_t", "int32_t")
+      result = result.replace("NONE64", "NONE32")
+  return result
+
+operator_handlers = {
+  "movq("       : ("movl(",     HandleMovQ),
+  "push("       : ("Push(",  HandlePushPop),
+  "pop("        : ("Pop(",   HandlePushPop),
+  "push_imm32(" : ("Push_imm32(",  Replace),
+  " cmovq("     : (" cmovl(",      Replace),
+  " xchg("      : (" xchgl(",      Replace),
+  " addq("      : (" addl(",       Replace),
+  " sbbq("      : (" sbbl(",       Replace),
+  " cmpq("      : (" cmpl(",       Replace),
+  " and_("      : (" andl(",       Replace),
+  " decq("      : (" decl(",       Replace),
+  " cqo("       : (" cdq(",        Replace),
+  " idivq("     : (" idivl(",      Replace),
+  " imul("      : (" imull(",      Replace),
+  " incq("      : (" incl(",       Replace),
+  " lea("       : (" leal(",       Replace),
+  " neg("       : (" negl(",       Replace),
+  " not_("      : (" notl(",       Replace),
+  " or_("       : (" orl(",        Replace),
+  " rol("       : (" roll(",       Replace),
+  " ror("       : (" rorl(",       Replace),
+  " sar("       : (" sarl(",       Replace),
+  " sar_cl("    : (" sarl_cl(",    Replace),
+  " shl("       : (" shll(",       Replace),
+  " shl_cl("    : (" shll_cl(",    Replace),
+  " shr("       : (" shrl(",       Replace),
+  " shr_cl("    : (" shrl_cl(",    Replace),
+  " subq("      : (" subl(",       Replace),
+  " testq("     : (" testl(",      Replace),
+  " xor_("      : (" xorl(",       Replace),
+  " movzxbq("   : (" movzxbl(",    Replace),
+  " repmovsq("  : (" repmovsl(",   Replace),
+}
+
+def HandleAnnotations(line, debug):
+  cont   = True
+  result = line
+  for annotation in annotation_handlers:
+    if result.find(annotation) != -1:
+      if result.find(annotation + " ") != -1:
+        if result.find("#define" + annotation + " __") != -1:
+          # Add a new line to keep debugging easier if debug
+          result = "\n" if debug else ""
+          annotation_handlers[annotation][0] = " __"
+        else:
+          (cont, result) = annotation_handlers[annotation][1](result)
+          if annotation_handlers[annotation][0] == " ":
+            result = result.replace(annotation + " ", \
+                                    annotation_handlers[annotation][0])
+          else:
+            result = result.replace(annotation, \
+                                    annotation_handlers[annotation][0])
+      else:
+        if result.find("#define") != -1 or result.find("#undef") != -1:
+          # Add a new line to keep debugging easier if debug
+          result = "\n" if debug else ""
+          annotation_handlers[annotation][0] = " "
+      break
+
+  return (cont, result)
+
+comment_replacements = {
+  "rbp[24]"   : "rbp[20]",
+  "rbp[32]"   : "rbp[24]",
+  "rbp[-n-8]" : "rbp[-n-4]",
+  "rsp[16]"   : "rsp[12]",
+  "rsp[24]"   : "rsp[16]",
+  "rsp[32]"   : "rsp[20]",
+  "rsp[40]"   : "rsp[24]",
+  "rsp[48]"   : "rsp[28]",
+  "rsp[56]"   : "rsp[32]",
+  "rsp[argc * 8]          "  : "rsp[(argc - 1) * 4 + 8]",
+  "rsp[kFastApiCallArguments * 8]          "  : \
+              "rsp[(kFastApiCallArguments - 1) * 4 + 8]",
+  "rsp[8 * argc]          "  : "rsp[(argc - 1) * 4 + 8]",
+  "rsp[8 * n]          "     : "rsp[(n - 1) * 4 + 8]",
+  "rsp[8 * num_arguments]          "  : "rsp[(num_arguments - 1) * 4 + 8]",
+  "rsp[8 * (argc + 1)]" : "rsp[argc * 4 + 8]  ",
+  "rsp[kFastApiCallArguments * 8 + 8]" : "rsp[kFastApiCallArguments * 4 + 8]  ",
+  "rsp[8 * (n + 1)]"               : "rsp[n * 4 + 8]  ",
+  "rsp[(argc + 1) * 8]"            : "rsp[argc * 4 + 8]  ",
+  "rsp[(argc + 6) * 8]    "        : "rsp[(argc + 5) * 4 + 8]",
+  "rsp[(argc + 7) * 8]    "        : "rsp[(argc + 6) * 4 + 8]",
+  "rsp[(argc - n) * 8]          "  : "rsp[(argc - n - 1) * 4 + 8]",
+}
+
+def HandleComment(line):
+  result = line
+  return result
+  ####### Temporarily disable the comment handling##################
+  for comment in comment_replacements:
+    if result.find(comment) != -1:
+      result = result.replace(comment, comment_replacements[comment])
+      break
+
+  return result
+
+def ProcessLine(line, is_assembler, debug):
+  if line.find("#include") != -1:
+    result = line.replace("x64", "x32")
+  else:
+    result = line.replace("X64", "X32")
+    if not is_assembler:
+      (cont, result) = HandleAnnotations(result, debug)
+      if cont:
+        for key in operator_handlers:
+          if result.find(key) != -1:
+            handler = operator_handlers[key][1]
+            result  = handler(result, key)
+            break
+
+  return result
+
+
+def ProcessLines(lines_in, lines_out, line_number, is_assembler, debug):
+  line_in  = lines_in[line_number]
+
+  if line_in.find("#ifdef V8_TARGET_ARCH_X32") != -1:
+    # Process codes inside #ifdef V8_TARGET_ARCH_X32 lines #endif
+    # If debug, keep the #ifdef and #endif, otherwise remove them
+    begin = line_number
+    if debug:
+      lines_out.append(line_in)
+
+    line_number += 1;
+    line_in = lines_in[line_number]
+    while (line_in.find("#endif")) == -1:
+      lines_out.append(line_in)
+      line_number += 1;
+      line_in = lines_in[line_number]
+
+    if debug:
+      lines_out.append(line_in)
+
+    return line_number - begin + 1
+  elif line_in.find("#ifndef V8_TARGET_ARCH_X32") != -1:
+    # Process codes inside #ifndef V8_TARGET_ARCH_X32 x64_lines #endif or
+    # #ifndef V8_TARGET_ARCH_X32 x64_lines #else x32_lines #endif
+    # If debug, keep all, otherwise remove #ifdef, x64_lines, #else and #endif
+    begin = line_number
+    if debug:
+      lines_out.append(line_in)
+
+    line_number += 1;
+    line_in = lines_in[line_number]
+    while (line_in.find("#else")) == -1 and (line_in.find("#endif")) == -1:
+      if debug:
+        lines_out.append(line_in)
+      line_number += 1;
+      line_in = lines_in[line_number]
+    if (line_in.find("#else")) != -1:
+      if debug:
+        lines_out.append(line_in)
+      line_number += 1;
+      line_in = lines_in[line_number]
+      while (line_in.find("#endif")) == -1:
+        lines_out.append(line_in)
+        line_number += 1;
+        line_in = lines_in[line_number]
+    if debug:
+      lines_out.append(line_in)
+
+    return line_number - begin + 1
+  elif (line_in.find("rsp[") != -1 or line_in.find("rbp[") != -1) \
+        and line_in.find("//") !=-1:
+    line_out = HandleComment(line_in)
+    lines_out.append(line_out)
+    return 1
+  else:
+    line_out = ProcessLine(line_in, is_assembler, debug)
+    lines_out.append(line_out)
+    return 1
+
+def ProcessFile(name, debug):
+  f_in = open(name, "r")
+  lines_in = f_in.readlines()
+  f_in.close()
+
+# Replace x64 with x32 to form the name "../../src/x32/code-stubs-x32.[h|cc]"
+# Create x32 folder if it does not exist
+  out_filename = name.replace("x64", "x32")
+  if not os.path.exists(os.path.dirname(out_filename)):
+    os.makedirs(os.path.dirname(out_filename))
+
+# Process lines of the input file
+  is_assembler = name.find("assembler-x64") == 14
+  lines_out = []
+  line_number = 0
+  total_lines = len(lines_in)
+  while line_number < total_lines:
+    line_number += ProcessLines(lines_in, lines_out, line_number, \
+                                is_assembler, debug)
+
+# Write generated contents into output file
+  f_out = open(out_filename, "w")
+  for item in lines_out:
+    f_out.write(item)
+  f_out.close()
+
+  return 0
+
+def Main():
+  argc = len(sys.argv)
+  if (argc == 1):
+    print("Usage: %s {debug|release} output_file_names input_file_names" % \
+           sys.argv[0])
+    return 1
+
+  mode = sys.argv[1].lower()
+  if mode != "debug" and mode != 'release':
+    print("{debug|release} mode is expected")
+    return 1
+  debug = True if mode == "debug" else False
+
+  if (argc == 2):
+    print("%s: No output file names and input file names" % sys.argv[0])
+    return 1
+
+  if (argc % 2 == 1):
+    print("%s: The number of output files should be equal with input files" % \
+           sys.argv[0])
+    return 1
+
+  input_start = argc/2 + 1
+  x64_source_lists = sys.argv[input_start:]
+
+  for item in x64_source_lists:
+    ProcessFile(item, debug)
+
+if __name__ == '__main__':
+  sys.exit(Main())