diff options
Diffstat (limited to 'third_party/aom/build/make/ads2gas_apple.pl')
| -rwxr-xr-x | third_party/aom/build/make/ads2gas_apple.pl | 235 |
1 files changed, 235 insertions, 0 deletions
diff --git a/third_party/aom/build/make/ads2gas_apple.pl b/third_party/aom/build/make/ads2gas_apple.pl new file mode 100755 index 000000000..31ec91d56 --- /dev/null +++ b/third_party/aom/build/make/ads2gas_apple.pl @@ -0,0 +1,235 @@ +#!/usr/bin/env perl +## Copyright (c) 2016, Alliance for Open Media. All rights reserved +## +## This source code is subject to the terms of the BSD 2 Clause License and +## the Alliance for Open Media Patent License 1.0. If the BSD 2 Clause License +## was not distributed with this source code in the LICENSE file, you can +## obtain it at www.aomedia.org/license/software. If the Alliance for Open +## Media Patent License 1.0 was not distributed with this source code in the +## PATENTS file, you can obtain it at www.aomedia.org/license/patent. +## + + +# ads2gas_apple.pl +# Author: Eric Fung (efung (at) acm.org) +# +# Convert ARM Developer Suite 1.0.1 syntax assembly source to GNU as format +# +# Usage: cat inputfile | perl ads2gas_apple.pl > outputfile +# + +my $chromium = 0; + +foreach my $arg (@ARGV) { + $chromium = 1 if ($arg eq "-chromium"); +} + +print "@ This file was created from a .asm file\n"; +print "@ using the ads2gas_apple.pl script.\n\n"; +print "\t.set WIDE_REFERENCE, 0\n"; +print "\t.set ARCHITECTURE, 5\n"; +print "\t.set DO1STROUNDING, 0\n"; + +my %register_aliases; +my %macro_aliases; + +my @mapping_list = ("\$0", "\$1", "\$2", "\$3", "\$4", "\$5", "\$6", "\$7", "\$8", "\$9"); + +my @incoming_array; + +my @imported_functions; + +# Perl trim function to remove whitespace from the start and end of the string +sub trim($) +{ + my $string = shift; + $string =~ s/^\s+//; + $string =~ s/\s+$//; + return $string; +} + +while (<STDIN>) +{ + # Load and store alignment + s/@/,:/g; + + # Comment character + s/;/ @/g; + + # Hexadecimal constants prefaced by 0x + s/#&/#0x/g; + + # Convert :OR: to | + s/:OR:/ | /g; + + # Convert :AND: to & + s/:AND:/ & /g; + + # Convert :NOT: to ~ + s/:NOT:/ ~ /g; + + # Convert :SHL: to << + s/:SHL:/ << /g; + + # Convert :SHR: to >> + s/:SHR:/ >> /g; + + # Convert ELSE to .else + s/\bELSE\b/.else/g; + + # Convert ENDIF to .endif + s/\bENDIF\b/.endif/g; + + # Convert ELSEIF to .elseif + s/\bELSEIF\b/.elseif/g; + + # Convert LTORG to .ltorg + s/\bLTORG\b/.ltorg/g; + + # Convert IF :DEF:to .if + # gcc doesn't have the ability to do a conditional + # if defined variable that is set by IF :DEF: on + # armasm, so convert it to a normal .if and then + # make sure to define a value elesewhere + if (s/\bIF :DEF:\b/.if /g) + { + s/=/==/g; + } + + # Convert IF to .if + if (s/\bIF\b/.if/g) + { + s/=/==/g; + } + + # Convert INCLUDE to .INCLUDE "file" + s/INCLUDE(\s*)(.*)$/.include $1\"$2\"/; + + # Code directive (ARM vs Thumb) + s/CODE([0-9][0-9])/.code $1/; + + # No AREA required + # But ALIGNs in AREA must be obeyed + s/^\s*AREA.*ALIGN=([0-9])$/.text\n.p2align $1/; + # If no ALIGN, strip the AREA and align to 4 bytes + s/^\s*AREA.*$/.text\n.p2align 2/; + + # DCD to .word + # This one is for incoming symbols + s/DCD\s+\|(\w*)\|/.long $1/; + + # DCW to .short + s/DCW\s+\|(\w*)\|/.short $1/; + s/DCW(.*)/.short $1/; + + # Constants defined in scope + s/DCD(.*)/.long $1/; + s/DCB(.*)/.byte $1/; + + # Build a hash of all the register - alias pairs. + if (s/(.*)RN(.*)/$1 .req $2/g) + { + $register_aliases{trim($1)} = trim($2); + next; + } + + while (($key, $value) = each(%register_aliases)) + { + s/\b$key\b/$value/g; + } + + # Make function visible to linker, and make additional symbol with + # prepended underscore + s/EXPORT\s+\|([\$\w]*)\|/.globl _$1\n\t.globl $1/; + + # Prepend imported functions with _ + if (s/IMPORT\s+\|([\$\w]*)\|/.globl $1/) + { + $function = trim($1); + push(@imported_functions, $function); + } + + foreach $function (@imported_functions) + { + s/$function/_$function/; + } + + # No vertical bars required; make additional symbol with prepended + # underscore + s/^\|(\$?\w+)\|/_$1\n\t$1:/g; + + # Labels need trailing colon +# s/^(\w+)/$1:/ if !/EQU/; + # put the colon at the end of the line in the macro + s/^([a-zA-Z_0-9\$]+)/$1:/ if !/EQU/; + + # ALIGN directive + s/\bALIGN\b/.balign/g; + + # Strip ARM + s/\sARM/@ ARM/g; + + # Strip REQUIRE8 + #s/\sREQUIRE8/@ REQUIRE8/g; + s/\sREQUIRE8/@ /g; + + # Strip PRESERVE8 + s/\sPRESERVE8/@ PRESERVE8/g; + + # Strip PROC and ENDPROC + s/\bPROC\b/@/g; + s/\bENDP\b/@/g; + + # EQU directive + s/(.*)EQU(.*)/.set $1, $2/; + + # Begin macro definition + if (/\bMACRO\b/) + { + # Process next line down, which will be the macro definition + $_ = <STDIN>; + + $trimmed = trim($_); + + # remove commas that are separating list + $trimmed =~ s/,//g; + + # string to array + @incoming_array = split(/\s+/, $trimmed); + + print ".macro @incoming_array[0]\n"; + + # remove the first element, as that is the name of the macro + shift (@incoming_array); + + @macro_aliases{@incoming_array} = @mapping_list; + + next; + } + + while (($key, $value) = each(%macro_aliases)) + { + $key =~ s/\$/\\\$/; + s/$key\b/$value/g; + } + + # For macros, use \ to reference formal params +# s/\$/\\/g; # End macro definition + s/\bMEND\b/.endm/; # No need to tell it where to stop assembling + next if /^\s*END\s*$/; + + # Clang used by Chromium differs slightly from clang in XCode in what it + # will accept in the assembly. + if ($chromium) { + s/qsubaddx/qsax/i; + s/qaddsubx/qasx/i; + s/ldrneb/ldrbne/i; + s/ldrneh/ldrhne/i; + s/(vqshrun\.s16 .*, \#)0$/${1}8/i; + + # http://llvm.org/bugs/show_bug.cgi?id=16022 + s/\.include/#include/; + } + + print; +} |