1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
|
{
Copyright (c) 2002 by Florian Klaempfl
Implements the x86-64 specific part of call nodes
This program is free software; you can redistribute it and/or modify
it under the terms of the GNU General Public License as published by
the Free Software Foundation; either version 2 of the License, or
(at your option) any later version.
This program is distributed in the hope that it will be useful,
but WITHOUT ANY WARRANTY; without even the implied warranty of
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
GNU General Public License for more details.
You should have received a copy of the GNU General Public License
along with this program; if not, write to the Free Software
Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
****************************************************************************
}
unit nx64cal;
{$i fpcdefs.inc}
interface
uses
symdef,
ncal,ncgcal;
type
tx8664callnode = class(tcgcallnode)
protected
procedure extra_call_code;override;
procedure set_result_location(realresdef: tstoreddef);override;
end;
implementation
uses
globtype,
systems,
cpubase,cgbase,cgutils,cgobj,
aasmtai,aasmdata,aasmcpu;
procedure tx8664callnode.extra_call_code;
var
mmregs : aint;
begin
{ x86_64 requires %al to contain the no. SSE regs passed }
if (cnf_uses_varargs in callnodeflags) and (target_info.system<>system_x86_64_win64) then
begin
if assigned(varargsparas) then
mmregs:=varargsparas.mmregsused
else
mmregs:=0;
current_asmdata.CurrAsmList.concat(taicpu.op_const_reg(A_MOV,S_Q,mmregs,NR_RAX))
end;
end;
procedure tx8664callnode.set_result_location(realresdef: tstoreddef);
begin
{ avoid useless "movq %xmm0,%rax" and "movq %rax,%xmm0" instructions
(which moreover for some reason are not supported by the Darwin
x86-64 assembler) }
if assigned(retloc.location) and
not assigned(retloc.location^.next) and
(retloc.location^.loc in [LOC_MMREGISTER,LOC_CMMREGISTER]) then
begin
location_reset(location,LOC_MMREGISTER,retloc.location^.size);
location.register:=cg.getmmregister(current_asmdata.CurrAsmList,retloc.location^.size);
end
else
inherited
end;
begin
ccallnode:=tx8664callnode;
end.
|
