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1#!/usr/local/bin/perl
2
3package x86nasm;
4
5$label="L000";
6$under=($main'netware)?'':'_';
7
8%lb=(	'eax',	'al',
9	'ebx',	'bl',
10	'ecx',	'cl',
11	'edx',	'dl',
12	'ax',	'al',
13	'bx',	'bl',
14	'cx',	'cl',
15	'dx',	'dl',
16	);
17
18%hb=(	'eax',	'ah',
19	'ebx',	'bh',
20	'ecx',	'ch',
21	'edx',	'dh',
22	'ax',	'ah',
23	'bx',	'bh',
24	'cx',	'ch',
25	'dx',	'dh',
26	);
27
28sub main'asm_init_output { @out=(); }
29sub main'asm_get_output { return(@out); }
30sub main'get_labels { return(@labels); }
31
32sub main'external_label
33{
34	push(@labels,@_);
35	foreach (@_) {
36		push(@out,".") if ($main'mwerks);
37		push(@out, "extern\t${under}$_\n");
38	}
39}
40
41sub main'LB
42	{
43	(defined($lb{$_[0]})) || die "$_[0] does not have a 'low byte'\n";
44	return($lb{$_[0]});
45	}
46
47sub main'HB
48	{
49	(defined($hb{$_[0]})) || die "$_[0] does not have a 'high byte'\n";
50	return($hb{$_[0]});
51	}
52
53sub main'BP
54	{
55	&get_mem("BYTE",@_);
56	}
57
58sub main'DWP
59	{
60	&get_mem("DWORD",@_);
61	}
62
63sub main'QWP
64	{
65	&get_mem("",@_);
66	}
67
68sub main'BC
69	{
70	return (($main'mwerks)?"":"BYTE ")."@_";
71	}
72
73sub main'DWC
74	{
75	return (($main'mwerks)?"":"DWORD ")."@_";
76	}
77
78sub main'stack_push
79	{
80	my($num)=@_;
81	$stack+=$num*4;
82	&main'sub("esp",$num*4);
83	}
84
85sub main'stack_pop
86	{
87	my($num)=@_;
88	$stack-=$num*4;
89	&main'add("esp",$num*4);
90	}
91
92sub get_mem
93	{
94	my($size,$addr,$reg1,$reg2,$idx)=@_;
95	my($t,$post);
96	my($ret)=$size;
97	if ($ret ne "")
98		{
99		$ret .= " PTR" if ($main'mwerks);
100		$ret .= " ";
101		}
102	$ret .= "[";
103	$addr =~ s/^\s+//;
104	if ($addr =~ /^(.+)\+(.+)$/)
105		{
106		$reg2=&conv($1);
107		$addr="$under$2";
108		}
109	elsif ($addr =~ /^[_a-z][_a-z0-9]*$/i)
110		{
111		$addr="$under$addr";
112		}
113
114	if ($addr =~ /^.+\-.+$/) { $addr="($addr)"; }
115
116	$reg1="$regs{$reg1}" if defined($regs{$reg1});
117	$reg2="$regs{$reg2}" if defined($regs{$reg2});
118	if (($addr ne "") && ($addr ne 0))
119		{
120		if ($addr !~ /^-/)
121			{ $ret.="${addr}+"; }
122		else	{ $post=$addr; }
123		}
124	if ($reg2 ne "")
125		{
126		$t="";
127		$t="*$idx" if ($idx != 0);
128		$reg1="+".$reg1 if ("$reg1$post" ne "");
129		$ret.="$reg2$t$reg1$post]";
130		}
131	else
132		{
133		$ret.="$reg1$post]"
134		}
135	$ret =~ s/\+\]/]/; # in case $addr was the only argument
136	return($ret);
137	}
138
139sub main'mov	{ &out2("mov",@_); }
140sub main'movb	{ &out2("mov",@_); }
141sub main'and	{ &out2("and",@_); }
142sub main'or	{ &out2("or",@_); }
143sub main'shl	{ &out2("shl",@_); }
144sub main'shr	{ &out2("shr",@_); }
145sub main'xor	{ &out2("xor",@_); }
146sub main'xorb	{ &out2("xor",@_); }
147sub main'add	{ &out2("add",@_); }
148sub main'adc	{ &out2("adc",@_); }
149sub main'sub	{ &out2("sub",@_); }
150sub main'sbb	{ &out2("sbb",@_); }
151sub main'rotl	{ &out2("rol",@_); }
152sub main'rotr	{ &out2("ror",@_); }
153sub main'exch	{ &out2("xchg",@_); }
154sub main'cmp	{ &out2("cmp",@_); }
155sub main'lea	{ &out2("lea",@_); }
156sub main'mul	{ &out1("mul",@_); }
157sub main'imul	{ &out2("imul",@_); }
158sub main'div	{ &out1("div",@_); }
159sub main'dec	{ &out1("dec",@_); }
160sub main'inc	{ &out1("inc",@_); }
161sub main'jmp	{ &out1("jmp",@_); }
162sub main'jmp_ptr { &out1p("jmp",@_); }
163
164# This is a bit of a kludge: declare all branches as NEAR.
165$near=($main'mwerks)?'':'NEAR';
166sub main'je	{ &out1("je $near",@_); }
167sub main'jle	{ &out1("jle $near",@_); }
168sub main'jz	{ &out1("jz $near",@_); }
169sub main'jge	{ &out1("jge $near",@_); }
170sub main'jl	{ &out1("jl $near",@_); }
171sub main'ja	{ &out1("ja $near",@_); }
172sub main'jae	{ &out1("jae $near",@_); }
173sub main'jb	{ &out1("jb $near",@_); }
174sub main'jbe	{ &out1("jbe $near",@_); }
175sub main'jc	{ &out1("jc $near",@_); }
176sub main'jnc	{ &out1("jnc $near",@_); }
177sub main'jnz	{ &out1("jnz $near",@_); }
178sub main'jne	{ &out1("jne $near",@_); }
179sub main'jno	{ &out1("jno $near",@_); }
180
181sub main'push	{ &out1("push",@_); $stack+=4; }
182sub main'pop	{ &out1("pop",@_); $stack-=4; }
183sub main'pushf	{ &out0("pushfd"); $stack+=4; }
184sub main'popf	{ &out0("popfd"); $stack-=4; }
185sub main'bswap	{ &out1("bswap",@_); &using486(); }
186sub main'not	{ &out1("not",@_); }
187sub main'call	{ &out1("call",($_[0]=~/^\@L/?'':$under).$_[0]); }
188sub main'call_ptr { &out1p("call",@_); }
189sub main'ret	{ &out0("ret"); }
190sub main'nop	{ &out0("nop"); }
191sub main'test	{ &out2("test",@_); }
192sub main'bt	{ &out2("bt",@_); }
193sub main'leave	{ &out0("leave"); }
194sub main'cpuid	{ &out0("cpuid"); }
195sub main'rdtsc	{ &out0("rdtsc"); }
196sub main'halt	{ &out0("hlt"); }
197sub main'movz	{ &out2("movzx",@_); }
198sub main'neg	{ &out1("neg",@_); }
199sub main'cld	{ &out0("cld"); }
200
201# SSE2
202sub main'emms	{ &out0("emms"); }
203sub main'movd	{ &out2("movd",@_); }
204sub main'movq	{ &out2("movq",@_); }
205sub main'movdqu	{ &out2("movdqu",@_); }
206sub main'movdqa	{ &out2("movdqa",@_); }
207sub main'movdq2q{ &out2("movdq2q",@_); }
208sub main'movq2dq{ &out2("movq2dq",@_); }
209sub main'paddq	{ &out2("paddq",@_); }
210sub main'pmuludq{ &out2("pmuludq",@_); }
211sub main'psrlq	{ &out2("psrlq",@_); }
212sub main'psllq	{ &out2("psllq",@_); }
213sub main'pxor	{ &out2("pxor",@_); }
214sub main'por	{ &out2("por",@_); }
215sub main'pand	{ &out2("pand",@_); }
216
217sub out2
218	{
219	my($name,$p1,$p2)=@_;
220	my($l,$t);
221
222	push(@out,"\t$name\t");
223	if (!$main'mwerks and $name eq "lea")
224		{
225		$p1 =~ s/^[^\[]*\[/\[/;
226		$p2 =~ s/^[^\[]*\[/\[/;
227		}
228	$t=&conv($p1).",";
229	$l=length($t);
230	push(@out,$t);
231	$l=4-($l+9)/8;
232	push(@out,"\t" x $l);
233	push(@out,&conv($p2));
234	push(@out,"\n");
235	}
236
237sub out0
238	{
239	my($name)=@_;
240
241	push(@out,"\t$name\n");
242	}
243
244sub out1
245	{
246	my($name,$p1)=@_;
247	my($l,$t);
248	push(@out,"\t$name\t".&conv($p1)."\n");
249	}
250
251sub conv
252	{
253	my($p)=@_;
254	$p =~ s/0x([0-9A-Fa-f]+)/0$1h/;
255	return $p;
256	}
257
258sub using486
259	{
260	return if $using486;
261	$using486++;
262	grep(s/\.386/\.486/,@out);
263	}
264
265sub main'file
266	{
267	if ($main'mwerks)	{ push(@out,".section\t.text\n"); }
268	else	{
269		local $tmp=<<___;
270%ifdef __omf__
271section	code	use32 class=code
272%else
273section	.text
274%endif
275___
276		push(@out,$tmp);
277		}
278	}
279
280sub main'function_begin
281	{
282	my($func,$extra)=@_;
283
284	push(@labels,$func);
285	push(@out,".") if ($main'mwerks);
286	my($tmp)=<<"EOF";
287global	$under$func
288$under$func:
289	push	ebp
290	push	ebx
291	push	esi
292	push	edi
293EOF
294	push(@out,$tmp);
295	$stack=20;
296	}
297
298sub main'function_begin_B
299	{
300	my($func,$extra)=@_;
301	push(@out,".") if ($main'mwerks);
302	my($tmp)=<<"EOF";
303global	$under$func
304$under$func:
305EOF
306	push(@out,$tmp);
307	$stack=4;
308	}
309
310sub main'function_end
311	{
312	my($func)=@_;
313
314	my($tmp)=<<"EOF";
315	pop	edi
316	pop	esi
317	pop	ebx
318	pop	ebp
319	ret
320EOF
321	push(@out,$tmp);
322	$stack=0;
323	%label=();
324	}
325
326sub main'function_end_B
327	{
328	$stack=0;
329	%label=();
330	}
331
332sub main'function_end_A
333	{
334	my($func)=@_;
335
336	my($tmp)=<<"EOF";
337	pop	edi
338	pop	esi
339	pop	ebx
340	pop	ebp
341	ret
342EOF
343	push(@out,$tmp);
344	}
345
346sub main'file_end
347	{
348	}
349
350sub main'wparam
351	{
352	my($num)=@_;
353
354	return(&main'DWP($stack+$num*4,"esp","",0));
355	}
356
357sub main'swtmp
358	{
359	return(&main'DWP($_[0]*4,"esp","",0));
360	}
361
362# Should use swtmp, which is above esp.  Linix can trash the stack above esp
363#sub main'wtmp
364#	{
365#	my($num)=@_;
366#
367#	return(&main'DWP(-(($num+1)*4),"esp","",0));
368#	}
369
370sub main'comment
371	{
372	foreach (@_)
373		{
374		push(@out,"\t; $_\n");
375		}
376	}
377
378sub main'public_label
379	{
380	$label{$_[0]}="${under}${_[0]}"	if (!defined($label{$_[0]}));
381	push(@out,".") if ($main'mwerks);
382	push(@out,"global\t$label{$_[0]}\n");
383	}
384
385sub main'label
386	{
387	if (!defined($label{$_[0]}))
388		{
389		$label{$_[0]}="\@${label}${_[0]}";
390		$label++;
391		}
392	return($label{$_[0]});
393	}
394
395sub main'set_label
396	{
397	if (!defined($label{$_[0]}))
398		{
399		$label{$_[0]}="\@${label}${_[0]}";
400		$label++;
401		}
402	if ($_[1]!=0 && $_[1]>1)
403		{
404		main'align($_[1]);
405		}
406	push(@out,"$label{$_[0]}:\n");
407	}
408
409sub main'data_byte
410	{
411	push(@out,(($main'mwerks)?".byte\t":"DB\t").join(',',@_)."\n");
412	}
413
414sub main'data_word
415	{
416	push(@out,(($main'mwerks)?".long\t":"DD\t").join(',',@_)."\n");
417	}
418
419sub main'align
420	{
421	push(@out,".") if ($main'mwerks);
422	push(@out,"align\t$_[0]\n");
423	}
424
425sub out1p
426	{
427	my($name,$p1)=@_;
428	my($l,$t);
429
430	push(@out,"\t$name\t".&conv($p1)."\n");
431	}
432
433sub main'picmeup
434	{
435	local($dst,$sym)=@_;
436	&main'lea($dst,&main'DWP($sym));
437	}
438
439sub main'blindpop { &out1("pop",@_); }
440
441sub main'initseg
442	{
443	local($f)=@_;
444	if ($main'win32)
445		{
446		local($tmp)=<<___;
447segment	.CRT\$XCU data
448extern	$under$f
449DD	$under$f
450___
451		push(@out,$tmp);
452		}
453	}
454
4551;
456