4 # &asm_init(<flavor>,"des-586.pl"[,$i386only]);
5 # &function_begin("foo");
7 # &function_end("foo");
13 # AUTOLOAD is this context has quite unpleasant side effect, namely
14 # that typos in function calls effectively go to assembler output,
15 # but on the pros side we don't have to implement one subroutine per
18 { my $opcode = $AUTOLOAD;
20 die "more than 4 arguments passed to $opcode" if ($#_>3);
23 if ($opcode =~ /^push/) { $stack+=4; }
24 elsif ($opcode =~ /^pop/) { $stack-=4; }
26 &generic($opcode,@_) or die "undefined subroutine \&$AUTOLOAD";
32 if ($#_==-1) { push(@out,"\t$opcode\n"); }
33 else { push(@out,"\t$opcode\t".join(',',@_)."\n"); }
37 { $_[0] =~ m/^e?([a-d])x$/o or die "$_[0] does not have a 'low byte'";
41 { $_[0] =~ m/^e?([a-d])x$/o or die "$_[0] does not have a 'high byte'";
44 sub ::stack_push{ my $num=$_[0]*4; $stack+=$num; &sub("esp",$num); }
45 sub ::stack_pop { my $num=$_[0]*4; $stack-=$num; &add("esp",$num); }
46 sub ::blindpop { &pop($_[0]); $stack+=4; }
47 sub ::wparam { &DWP($stack+4*$_[0],"esp"); }
48 sub ::swtmp { &DWP(4*$_[0],"esp"); }
51 { if ($i386) # emulate bswap for i386
52 { &comment("bswap @_");
53 &xchg(&HB(@_),&LB(@_));
55 &xchg(&HB(@_),&LB(@_));
58 { &generic("bswap",@_); }
60 # These are made-up opcodes introduced over the years essentially
61 # by ignorance, just alias them to real ones...
62 sub ::movb { &mov(@_); }
63 sub ::xorb { &xor(@_); }
64 sub ::rotl { &rol(@_); }
65 sub ::rotr { &ror(@_); }
66 sub ::exch { &xchg(@_); }
68 sub ::movz { &movzx(@_); }
69 sub ::pushf { &pushfd; }
70 sub ::popf { &popfd; }
72 # 3 argument instructions
74 { my($p1,$p2,$optimize)=@_;
76 if ($optimize && $p1=~/^mm[0-7]$/ && $p2=~/^mm[0-7]$/)
77 # movq between mmx registers can sink Intel CPUs
78 { &::pshufw($p1,$p2,0xe4); }
80 { &::generic("movq",@_); }
84 my %regrm = ( "eax"=>0, "ecx"=>1, "edx"=>2, "ebx"=>3,
85 "esp"=>4, "ebp"=>5, "esi"=>6, "edi"=>7 );
87 { my($dst,$src,$imm)=@_;
88 if ("$dst:$src" =~ /(e[a-dsd][ixp]):xmm([0-7])/)
89 { &data_byte(0x66,0x0f,0x3a,0x16,0xc0|($2<<3)|$regrm{$1},$imm); }
93 { my($dst,$src,$imm)=@_;
94 if ("$dst:$src" =~ /xmm([0-7]):(e[a-dsd][ixp])/)
95 { &data_byte(0x66,0x0f,0x3a,0x22,0xc0|($1<<3)|$regrm{$2},$imm); }
100 if ("$dst:$src" =~ /xmm([0-7]):xmm([0-7])/)
101 { &data_byte(0x66,0x0f,0x38,0x00,0xc0|($1<<3)|$2); }
105 sub ::aeskeygenassist
106 { my($dst,$src,$imm)=@_;
107 if ("$dst:$src" =~ /xmm([0-7]):xmm([0-7])/)
108 { &data_byte(0x66,0x0f,0x3a,0xdf,0xc0|($1<<3)|$2,$imm); }
111 { my($opcodelet,$dst,$src)=@_;
112 if ("$dst:$src" =~ /xmm([0-7]):xmm([0-7])/)
113 { &data_byte(0x66,0x0f,0x38,$opcodelet,0xc0|($1<<3)|$2); }
115 sub ::aesimc { ::aescommon(0xdb,@_); }
116 sub ::aesenc { ::aescommon(0xdc,@_); }
117 sub ::aesenclast { ::aescommon(0xdd,@_); }
118 sub ::aesdec { ::aescommon(0xde,@_); }
119 sub ::aesdeclast { ::aescommon(0xdf,@_); }
122 { my($dst,$src,$imm)=@_;
123 if ("$dst:$src" =~ /xmm([0-7]):xmm([0-7])/)
124 { &data_byte(0x66,0x0f,0x3a,0x44,0xc0|($1<<3)|$2,$imm); }
128 $lbdecor="L"; # local label decoration, set by package
131 sub ::islabel # see is argument is a known label
133 foreach $i (values %label) { return $i if ($i eq $_[0]); }
134 $label{$_[0]}; # can be undef
137 sub ::label # instantiate a function-scope label
138 { if (!defined($label{$_[0]}))
139 { $label{$_[0]}="${lbdecor}${label}${_[0]}"; $label++; }
143 sub ::LABEL # instantiate a file-scope label
144 { $label{$_[0]}=$_[1] if (!defined($label{$_[0]}));
148 sub ::static_label { &::LABEL($_[0],$lbdecor.$_[0]); }
150 sub ::set_label_B { push(@out,"@_:\n"); }
152 { my $label=&::label($_[0]);
153 &::align($_[1]) if ($_[1]>1);
154 &::set_label_B($label);
158 sub ::wipe_labels # wipes function-scope labels
159 { foreach $i (keys %label)
160 { delete $label{$i} if ($label{$i} =~ /^\Q${lbdecor}\E[0-9]{3}/); }
163 # subroutine management
165 { &function_begin_B(@_);
190 $stack+=16; # readjust esp as if we didn't pop anything
194 { my @str=unpack("C*",shift);
197 &data_byte(@str[0..15]);
198 foreach (0..15) { shift @str; }
200 &data_byte(@str) if (@str);
209 { my ($type,$fn,$cpu)=@_;
214 $elf=$cpp=$coff=$aout=$macosx=$win32=$netware=$mwerks=0;
215 if (($type eq "elf"))
216 { $elf=1; require "x86gas.pl"; }
217 elsif (($type eq "a\.out"))
218 { $aout=1; require "x86gas.pl"; }
219 elsif (($type eq "coff" or $type eq "gaswin"))
220 { $coff=1; require "x86gas.pl"; }
221 elsif (($type eq "win32n"))
222 { $win32=1; require "x86nasm.pl"; }
223 elsif (($type eq "nw-nasm"))
224 { $netware=1; require "x86nasm.pl"; }
225 #elsif (($type eq "nw-mwasm"))
226 #{ $netware=1; $mwerks=1; require "x86nasm.pl"; }
227 elsif (($type eq "win32"))
228 { $win32=1; require "x86masm.pl"; }
229 elsif (($type eq "macosx"))
230 { $aout=1; $macosx=1; require "x86gas.pl"; }
232 { print STDERR <<"EOF";
233 Pick one target type from
234 elf - Linux, FreeBSD, Solaris x86, etc.
235 a.out - DJGPP, elder OpenBSD, etc.
236 coff - GAS/COFF such as Win32 targets
237 win32n - Windows 95/Windows NT NASM format
238 nw-nasm - NetWare NASM format
245 for (@ARGV) { $pic=1 if (/\-[fK]PIC/i); }
247 $filename =~ s/\.pl$//;