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{
This file is part of the Free Pascal run time library.
Copyright (c) 1999-2000 by Florian Klaempfl
This unit contains some routines to get informations about the
processor
See the file COPYING.FPC, included in this distribution,
for details about the copyright.
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.
**********************************************************************}
{$mode objfpc}
unit cpu;
interface
{$ifdef freebsd} // FreeBSD 7/8 have binutils version that don't support cmpxchg16b
// Unless overridebinutils is defined (for ports usage), use db instead of the instruction
{$ifndef overridebinutils}
{$define oldbinutils}
{$endif}
{$endif}
uses
sysutils;
function InterlockedCompareExchange128Support : boolean;inline;
function AESSupport : boolean;inline;
function AVXSupport : boolean;inline;
function AVX2Support: boolean;inline;
function FMASupport: boolean;inline;
function POPCNTSupport: boolean;inline;
function SSE41Support: boolean;inline;
function SSE42Support: boolean;inline;
function MOVBESupport: boolean;inline;
function F16CSupport: boolean;inline;
function RDRANDSupport: boolean;inline;
function RTMSupport: boolean;inline;
var
is_sse3_cpu : boolean = false;
function InterlockedCompareExchange128(var Target: Int128Rec; NewValue: Int128Rec; Comperand: Int128Rec): Int128Rec;
implementation
{$asmmode att}
var
_AESSupport,
_AVXSupport,
_InterlockedCompareExchange128Support,
_AVX2Support,
_FMASupport,
_POPCNTSupport,
_SSE41Support,
_SSE42Support,
_MOVBESupport,
_F16CSupport,
_RDRANDSupport,
_RTMSupport: boolean;
function InterlockedCompareExchange128(var Target: Int128Rec; NewValue: Int128Rec; Comperand: Int128Rec): Int128Rec; assembler;
{
win64:
rcx ... pointer to result
rdx ... target
r8 ... NewValue
r9 ... Comperand
}
{$ifdef win64}
asm
pushq %rbx
{ store result pointer for later use }
pushq %rcx
{ load new value }
movq (%r8),%rbx
movq 8(%r8),%rcx
{ save target pointer for later use }
movq %rdx,%r8
{ load comperand }
movq (%r9),%rax
movq 8(%r9),%rdx
{$ifdef oldbinutils}
.byte 0xF0,0x49,0x0F,0xC7,0x08
{$else}
lock cmpxchg16b (%r8)
{$endif}
{ restore result pointer }
popq %rcx
{ store result }
movq %rax,(%rcx)
movq %rdx,8(%rcx)
popq %rbx
end;
{$else win64}
{
linux:
rdi ... target
[rsi:rdx] ... NewValue
[rcx:r8] ... Comperand
[rdx:rax] ... result
}
asm
pushq %rbx
movq %rsi,%rbx // new value low
movq %rcx,%rax // comperand low
movq %rdx,%rcx // new value high
movq %r8,%rdx // comperand high
{$ifdef oldbinutils}
.byte 0xF0,0x48,0x0F,0xC7,0x0F
{$else}
lock cmpxchg16b (%rdi)
{$endif}
popq %rbx
end;
{$endif win64}
function XGETBV(i : dword) : int64;assembler;
asm
{$ifndef win64}
movq %rdi,%rcx
{$endif win64}
// older FPCs don't know the xgetbv opcode
.byte 0x0f,0x01,0xd0
andl $0xffffffff,%eax
shlq $32,%rdx
orq %rdx,%rax
end;
procedure SetupSupport;
var
_ecx,
_ebx : longint;
begin
asm
movl $0x00000001,%eax
cpuid
movl %ecx,_ecx
end ['rax','rbx','rcx','rdx'];
_InterlockedCompareExchange128Support:=(_ecx and $2000)<>0;
_AESSupport:=(_ecx and $2000000)<>0;
_POPCNTSupport:=(_ecx and $800000)<>0;
_SSE41Support:=(_ecx and $80000)<>0;
_SSE42Support:=(_ecx and $100000)<>0;
_MOVBESupport:=(_ecx and $400000)<>0;
_F16CSupport:=(_ecx and $20000000)<>0;
_RDRANDSupport:=(_ecx and $40000000)<>0;
_AVXSupport:=
{ XGETBV suspport? }
((_ecx and $08000000)<>0) and
{ xmm and ymm state enabled? }
((XGETBV(0) and %110)=%110) and
{ avx supported? }
((_ecx and $10000000)<>0);
is_sse3_cpu:=(_ecx and $1)<>0;
_FMASupport:=_AVXSupport and ((_ecx and $1000)<>0);
asm
movl $7,%eax
movl $0,%ecx
cpuid
movl %ebx,_ebx
end ['rax','rbx','rcx','rdx'];
_AVX2Support:=_AVXSupport and ((_ebx and $20)<>0);
_RTMSupport:=((_ebx and $800)<>0);
end;
function InterlockedCompareExchange128Support : boolean;inline;
begin
result:=_InterlockedCompareExchange128Support;
end;
function AESSupport : boolean;inline;
begin
result:=_AESSupport;
end;
function AVXSupport: boolean;inline;
begin
result:=_AVXSupport;
end;
function AVX2Support: boolean;inline;
begin
result:=_AVX2Support;
end;
function FMASupport: boolean;inline;
begin
result:=_FMASupport;
end;
function POPCNTSupport: boolean;inline;
begin
result:=_POPCNTSupport;
end;
function SSE41Support: boolean;inline;
begin
result:=_SSE41Support;
end;
function SSE42Support: boolean;inline;
begin
result:=_SSE42Support;
end;
function MOVBESupport: boolean;inline;
begin
result:=_MOVBESupport;
end;
function F16CSupport: boolean;inline;
begin
result:=_F16CSupport;
end;
function RDRANDSupport: boolean;inline;
begin
result:=_RDRANDSupport;
end;
function RTMSupport: boolean;inline;
begin
result:=_RTMSupport;
end;
begin
SetupSupport;
end.
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