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Optimize.Move.pas
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Optimize.Move.pas
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(*
Optimize.Move -- optimizing System.Move routine for SIMD
instruction sets at runtime.
Copyright (C) 2008 Ciobanu Alexandru, MMX/SSE/SSE2/SSE3 versions
of Move routine originally written by Seth and taken from
YAWE project: http://code.google.com/p/yawe-mmorpg/
This library is free software; you can redistribute it and/or
modify it under the terms of the GNU Lesser General Public
License as published by the Free Software Foundation; either
version 2.1 of the License, or (at your option) any later version.
This library 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
Lesser General Public License for more details.
You should have received a copy of the GNU Lesser General Public
License along with this library; if not, write to the Free Software
Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
*)
unit Optimize.Move;
interface
implementation
uses
smmFunctions;
//uses
// Windows, SysUtils;
{ SIMD Detection code }
type
TSimdInstructionSupport = (sisMMX, sisSSE, sisSSE2, sisSSE3);
TSimdInstructionSupportSet = set of TSimdInstructionSupport;
TCPUIDRegs = record
rEAX, rEBX, rECX, rEDX : Cardinal;
end;
var
SimdSupported : TSimdInstructionSupportSet;
CacheLimit : Integer;
NbrOfCPUs : Cardinal;
function CPUID(const FuncId : Cardinal) : TCPUIDRegs;
var
Regs : TCPUIDRegs;
begin
{ Request the opcode support }
asm
{ Save registers }
PUSH EAX
PUSH EBX
PUSH ECX
PUSH EDX
{ Set the function 1 and clear others }
MOV EAX, [FuncId]
XOR EBX, EBX
XOR ECX, ECX
XOR EDX, EDX
{ Call CPUID }
CPUID
{ Store the registers we need }
MOV [Regs.rEAX], EAX
MOV [Regs.rEBX], EBX
MOV [Regs.rECX], ECX
MOV [Regs.rEDX], EDX
{ Restore registers }
POP EDX
POP ECX
POP EBX
POP EAX
end;
Result := Regs;
end;
function CPUIIDSupports(const FuncId : Cardinal; const Extended : Boolean = false) : Boolean;
begin
if Extended then
Result := CPUID($80000000).rEAX >= FuncId
else
Result := CPUID($00000000).rEAX >= FuncId;
end;
function GetSupportedSimdInstructionSets : TSimdInstructionSupportSet;
var
Regs : TCPUIDRegs;
begin
Result := [];
{ Check for iset support }
if not CPUIIDSupports($00000001) then
Exit;
{ Request SIMD support }
Regs := CPUID($00000001);
if ((Regs.rECX and 1) <> 0) then
Result := Result + [sisSSE3];
if ((Regs.rEDX and (1 shl 23)) <> 0) then
Result := Result + [sisMMX];
if ((Regs.rEDX and (1 shl 25)) <> 0) then
Result := Result + [sisSSE];
if ((Regs.rEDX and (1 shl 26)) <> 0) then
Result := Result + [sisSSE2];
{
Check if Windows supports XMM registers - run an instruction and check
for exceptions.
}
try
asm
ORPS XMM0, XMM0
end
except
begin
{ Exclude SSE instructions! }
Result := Result - [sisSSE, sisSSE2, sisSSE3];
end;
end;
end;
function GetL2CacheSize : Integer;
var
{ Variables used for config description }
Regs: TCPUIDRegs;
CfgD: packed array[0..15] of Byte absolute Regs;
I, J: Integer;
QueryCount: Byte;
begin
{ Unknown cache size }
Result := 0;
{ Check for cache support }
if not CPUIIDSupports($00000002) then
Exit;
{ Request cache support }
Regs := CPUID($00000002);
{ Query count }
QueryCount := Regs.rEAX and $FF;
for I := 1 to QueryCount do
begin
for J := 1 to 15 do
begin
case CfgD[J] of
$39: Result := 128;
$3B: Result := 128;
$3C: Result := 256;
$41: Result := 128;
$42: Result := 256;
$43: Result := 512;
$44: Result := 1024;
$45: Result := 2048;
$78: Result := 1024;
$79: Result := 128;
$7A: Result := 256;
$7B: Result := 512;
$7C: Result := 1024;
$7D: Result := 2048;
$7F: Result := 512;
$82: Result := 256;
$83: Result := 512;
$84: Result := 1024;
$85: Result := 2048;
$86: Result := 512;
$87: Result := 1024;
end;
end;
{ Re-Request cache support }
if I < QueryCount then
Regs := CPUID($00000002);
end;
end;
function GetExtendedL2CacheSize : Integer;
var
Regs: TCPUIDRegs;
begin
Result := 0;
{ Check for cache support }
if not CPUIIDSupports($80000006, true) then
Exit;
{ CPUID: $80000005 }
Regs := CPUID($80000006);
{ L2 Cache size }
Result := Regs.rECX shr 16;
end;
procedure GetCPUInfo();
var
CacheSize1, CacheSize2 : Integer;
SysInfo : TSystemInfo;
begin
{ Detect supported SIMD sets }
SimdSupported := GetSupportedSimdInstructionSets();
CacheSize1 := GetL2CacheSize();
CacheSize2 := GetExtendedL2CacheSize();
{ Get the cache limit }
if CacheSize2 > 0 then
CacheLimit := CacheSize2 * -512
else
CacheLimit := CacheSize1 * -512;
{ If the cache size is unknown use a hack }
if CacheLimit = 0 then
CacheLimit := -$7FFFFFFF;
{ Get core count }
GetSystemInfo(SysInfo);
NbrOfCPUs := SysInfo.dwNumberOfProcessors;
end;
function PatchMethod(OldMethod, NewMethod : Pointer) : Boolean;
const
SizeOfJump = 5;
var
OldFlags : Cardinal;
__Jump : ^Byte;
__Addr : ^Integer;
begin
Result := False;
try
{ Change the code protection to write }
VirtualProtect(OldMethod, SizeOfJump, PAGE_READWRITE, OldFlags);
except
begin Exit; end;
end;
try
{ Insert the jump instruction }
__Jump := OldMethod;
__Jump^ := $E9;
{ Insert the jump address = (OLD - NEW - SIZEOFJUMP)}
__Addr := Ptr(Integer(OldMethod) + 1);
__Addr^ := Integer(NewMethod) - Integer(OldMethod) - SizeOfJump;
finally
{ Change the protection back to what it was }
VirtualProtect(OldMethod, SizeOfJump, OldFlags, OldFlags);
end;
{ Set status to success }
Result := True;
end;
const
TINYSIZE = 36;
procedure SmallForwardMove;
asm
jmp dword ptr [@@FwdJumpTable+ecx*4]
nop {Align Jump Table}
@@FwdJumpTable:
dd @@Done {Removes need to test for zero size move}
dd @@Fwd01, @@Fwd02, @@Fwd03, @@Fwd04, @@Fwd05, @@Fwd06, @@Fwd07, @@Fwd08
dd @@Fwd09, @@Fwd10, @@Fwd11, @@Fwd12, @@Fwd13, @@Fwd14, @@Fwd15, @@Fwd16
dd @@Fwd17, @@Fwd18, @@Fwd19, @@Fwd20, @@Fwd21, @@Fwd22, @@Fwd23, @@Fwd24
dd @@Fwd25, @@Fwd26, @@Fwd27, @@Fwd28, @@Fwd29, @@Fwd30, @@Fwd31, @@Fwd32
dd @@Fwd33, @@Fwd34, @@Fwd35, @@Fwd36
@@Fwd36:
mov ecx, [eax-36]
mov [edx-36], ecx
@@Fwd32:
mov ecx, [eax-32]
mov [edx-32], ecx
@@Fwd28:
mov ecx, [eax-28]
mov [edx-28], ecx
@@Fwd24:
mov ecx, [eax-24]
mov [edx-24], ecx
@@Fwd20:
mov ecx, [eax-20]
mov [edx-20], ecx
@@Fwd16:
mov ecx, [eax-16]
mov [edx-16], ecx
@@Fwd12:
mov ecx, [eax-12]
mov [edx-12], ecx
@@Fwd08:
mov ecx, [eax-8]
mov [edx-8], ecx
@@Fwd04:
mov ecx, [eax-4]
mov [edx-4], ecx
ret
nop
@@Fwd35:
mov ecx, [eax-35]
mov [edx-35], ecx
@@Fwd31:
mov ecx, [eax-31]
mov [edx-31], ecx
@@Fwd27:
mov ecx, [eax-27]
mov [edx-27], ecx
@@Fwd23:
mov ecx, [eax-23]
mov [edx-23], ecx
@@Fwd19:
mov ecx, [eax-19]
mov [edx-19], ecx
@@Fwd15:
mov ecx, [eax-15]
mov [edx-15], ecx
@@Fwd11:
mov ecx, [eax-11]
mov [edx-11], ecx
@@Fwd07:
mov ecx, [eax-7]
mov [edx-7], ecx
mov ecx, [eax-4]
mov [edx-4], ecx
ret
nop
@@Fwd03:
movzx ecx, word ptr [eax-3]
mov [edx-3], cx
movzx ecx, byte ptr [eax-1]
mov [edx-1], cl
ret
@@Fwd34:
mov ecx, [eax-34]
mov [edx-34], ecx
@@Fwd30:
mov ecx, [eax-30]
mov [edx-30], ecx
@@Fwd26:
mov ecx, [eax-26]
mov [edx-26], ecx
@@Fwd22:
mov ecx, [eax-22]
mov [edx-22], ecx
@@Fwd18:
mov ecx, [eax-18]
mov [edx-18], ecx
@@Fwd14:
mov ecx, [eax-14]
mov [edx-14], ecx
@@Fwd10:
mov ecx, [eax-10]
mov [edx-10], ecx
@@Fwd06:
mov ecx, [eax-6]
mov [edx-6], ecx
@@Fwd02:
movzx ecx, word ptr [eax-2]
mov [edx-2], cx
ret
nop
nop
nop
@@Fwd33:
mov ecx, [eax-33]
mov [edx-33], ecx
@@Fwd29:
mov ecx, [eax-29]
mov [edx-29], ecx
@@Fwd25:
mov ecx, [eax-25]
mov [edx-25], ecx
@@Fwd21:
mov ecx, [eax-21]
mov [edx-21], ecx
@@Fwd17:
mov ecx, [eax-17]
mov [edx-17], ecx
@@Fwd13:
mov ecx, [eax-13]
mov [edx-13], ecx
@@Fwd09:
mov ecx, [eax-9]
mov [edx-9], ecx
@@Fwd05:
mov ecx, [eax-5]
mov [edx-5], ecx
@@Fwd01:
movzx ecx, byte ptr [eax-1]
mov [edx-1], cl
ret
@@Done:
end;
{-------------------------------------------------------------------------}
{Perform Backward Move of 0..36 Bytes}
{On Entry, ECX = Count, EAX = Source, EDX = Dest. Destroys ECX}
procedure SmallBackwardMove;
asm
jmp dword ptr [@@BwdJumpTable+ecx*4]
nop {Align Jump Table}
@@BwdJumpTable:
dd @@Done {Removes need to test for zero size move}
dd @@Bwd01, @@Bwd02, @@Bwd03, @@Bwd04, @@Bwd05, @@Bwd06, @@Bwd07, @@Bwd08
dd @@Bwd09, @@Bwd10, @@Bwd11, @@Bwd12, @@Bwd13, @@Bwd14, @@Bwd15, @@Bwd16
dd @@Bwd17, @@Bwd18, @@Bwd19, @@Bwd20, @@Bwd21, @@Bwd22, @@Bwd23, @@Bwd24
dd @@Bwd25, @@Bwd26, @@Bwd27, @@Bwd28, @@Bwd29, @@Bwd30, @@Bwd31, @@Bwd32
dd @@Bwd33, @@Bwd34, @@Bwd35, @@Bwd36
@@Bwd36:
mov ecx, [eax+32]
mov [edx+32], ecx
@@Bwd32:
mov ecx, [eax+28]
mov [edx+28], ecx
@@Bwd28:
mov ecx, [eax+24]
mov [edx+24], ecx
@@Bwd24:
mov ecx, [eax+20]
mov [edx+20], ecx
@@Bwd20:
mov ecx, [eax+16]
mov [edx+16], ecx
@@Bwd16:
mov ecx, [eax+12]
mov [edx+12], ecx
@@Bwd12:
mov ecx, [eax+8]
mov [edx+8], ecx
@@Bwd08:
mov ecx, [eax+4]
mov [edx+4], ecx
@@Bwd04:
mov ecx, [eax]
mov [edx], ecx
ret
nop
nop
nop
@@Bwd35:
mov ecx, [eax+31]
mov [edx+31], ecx
@@Bwd31:
mov ecx, [eax+27]
mov [edx+27], ecx
@@Bwd27:
mov ecx, [eax+23]
mov [edx+23], ecx
@@Bwd23:
mov ecx, [eax+19]
mov [edx+19], ecx
@@Bwd19:
mov ecx, [eax+15]
mov [edx+15], ecx
@@Bwd15:
mov ecx, [eax+11]
mov [edx+11], ecx
@@Bwd11:
mov ecx, [eax+7]
mov [edx+7], ecx
@@Bwd07:
mov ecx, [eax+3]
mov [edx+3], ecx
mov ecx, [eax]
mov [edx], ecx
ret
nop
nop
nop
@@Bwd03:
movzx ecx, word ptr [eax+1]
mov [edx+1], cx
movzx ecx, byte ptr [eax]
mov [edx], cl
ret
nop
nop
@@Bwd34:
mov ecx, [eax+30]
mov [edx+30], ecx
@@Bwd30:
mov ecx, [eax+26]
mov [edx+26], ecx
@@Bwd26:
mov ecx, [eax+22]
mov [edx+22], ecx
@@Bwd22:
mov ecx, [eax+18]
mov [edx+18], ecx
@@Bwd18:
mov ecx, [eax+14]
mov [edx+14], ecx
@@Bwd14:
mov ecx, [eax+10]
mov [edx+10], ecx
@@Bwd10:
mov ecx, [eax+6]
mov [edx+6], ecx
@@Bwd06:
mov ecx, [eax+2]
mov [edx+2], ecx
@@Bwd02:
movzx ecx, word ptr [eax]
mov [edx], cx
ret
nop
@@Bwd33:
mov ecx, [eax+29]
mov [edx+29], ecx
@@Bwd29:
mov ecx, [eax+25]
mov [edx+25], ecx
@@Bwd25:
mov ecx, [eax+21]
mov [edx+21], ecx
@@Bwd21:
mov ecx, [eax+17]
mov [edx+17], ecx
@@Bwd17:
mov ecx, [eax+13]
mov [edx+13], ecx
@@Bwd13:
mov ecx, [eax+9]
mov [edx+9], ecx
@@Bwd09:
mov ecx, [eax+5]
mov [edx+5], ecx
@@Bwd05:
mov ecx, [eax+1]
mov [edx+1], ecx
@@Bwd01:
movzx ecx, byte ptr[eax]
mov [edx], cl
ret
@@Done:
end;
{-------------------------------------------------------------------------}
{Move ECX Bytes from EAX to EDX, where EAX > EDX and ECX > 36 (TINYSIZE)}
procedure Forwards_IA32;
asm
fild qword ptr [eax] {First 8}
lea eax, [eax+ecx-8]
lea ecx, [edx+ecx-8]
push edx
push ecx
fild qword ptr [eax] {Last 8}
neg ecx {QWORD Align Writes}
and edx, -8
lea ecx, [ecx+edx+8]
pop edx
@@Loop:
fild qword ptr [eax+ecx]
fistp qword ptr [edx+ecx]
add ecx, 8
jl @@Loop
pop eax
fistp qword ptr [edx] {Last 8}
fistp qword ptr [eax] {First 8}
end;
{-------------------------------------------------------------------------}
{Move ECX Bytes from EAX to EDX, where EAX < EDX and ECX > 36 (TINYSIZE)}
procedure Backwards_IA32;
asm
sub ecx, 8
fild qword ptr [eax+ecx] {Last 8}
fild qword ptr [eax] {First 8}
add ecx, edx {QWORD Align Writes}
push ecx
and ecx, -8
sub ecx, edx
@@Loop:
fild qword ptr [eax+ecx]
fistp qword ptr [edx+ecx]
sub ecx, 8
jg @@Loop
pop eax
fistp qword ptr [edx] {First 8}
fistp qword ptr [eax] {Last 8}
end;
{-------------------------------------------------------------------------}
{Move ECX Bytes from EAX to EDX, where EAX > EDX and ECX > 36 (TINYSIZE)}
procedure Forwards_MMX;
const
SMALLSIZE = 64;
LARGESIZE = 2048;
asm
cmp ecx, SMALLSIZE {Size at which using MMX becomes worthwhile}
jl Forwards_IA32
cmp ecx, LARGESIZE
jge @@FwdLargeMove
push ebx
mov ebx, edx
movq mm0, [eax] {First 8 Bytes}
add eax, ecx {QWORD Align Writes}
add ecx, edx
and edx, -8
add edx, 40
sub ecx, edx
add edx, ecx
neg ecx
nop {Align Loop}
@@FwdLoopMMX:
movq mm1, [eax+ecx-32]
movq mm2, [eax+ecx-24]
movq mm3, [eax+ecx-16]
movq mm4, [eax+ecx- 8]
movq [edx+ecx-32], mm1
movq [edx+ecx-24], mm2
movq [edx+ecx-16], mm3
movq [edx+ecx- 8], mm4
add ecx, 32
jle @@FwdLoopMMX
movq [ebx], mm0 {First 8 Bytes}
emms
pop ebx
neg ecx
add ecx, 32
jmp SmallForwardMove
nop {Align Loop}
nop
@@FwdLargeMove:
push ebx
mov ebx, ecx
test edx, 15
jz @@FwdAligned
lea ecx, [edx+15] {16 byte Align Destination}
and ecx, -16
sub ecx, edx
add eax, ecx
add edx, ecx
sub ebx, ecx
call SmallForwardMove
@@FwdAligned:
mov ecx, ebx
and ecx, -16
sub ebx, ecx {EBX = Remainder}
push esi
push edi
mov esi, eax {ESI = Source}
mov edi, edx {EDI = Dest}
mov eax, ecx {EAX = Count}
and eax, -64 {EAX = No of Bytes to Blocks Moves}
and ecx, $3F {ECX = Remaining Bytes to Move (0..63)}
add esi, eax
add edi, eax
neg eax
@@MMXcopyloop:
movq mm0, [esi+eax ]
movq mm1, [esi+eax+ 8]
movq mm2, [esi+eax+16]
movq mm3, [esi+eax+24]
movq mm4, [esi+eax+32]
movq mm5, [esi+eax+40]
movq mm6, [esi+eax+48]
movq mm7, [esi+eax+56]
movq [edi+eax ], mm0
movq [edi+eax+ 8], mm1
movq [edi+eax+16], mm2
movq [edi+eax+24], mm3
movq [edi+eax+32], mm4
movq [edi+eax+40], mm5
movq [edi+eax+48], mm6
movq [edi+eax+56], mm7
add eax, 64
jnz @@MMXcopyloop
emms {Empty MMX State}
add ecx, ebx
shr ecx, 2
rep movsd
mov ecx, ebx
and ecx, 3
rep movsb
pop edi
pop esi
pop ebx
end;
{-------------------------------------------------------------------------}
{Move ECX Bytes from EAX to EDX, where EAX < EDX and ECX > 36 (TINYSIZE)}
procedure Backwards_MMX;
const
SMALLSIZE = 64;
asm
cmp ecx, SMALLSIZE {Size at which using MMX becomes worthwhile}
jl Backwards_IA32
push ebx
movq mm0, [eax+ecx-8] {Get Last QWORD}
lea ebx, [edx+ecx] {QWORD Align Writes}
and ebx, 7
sub ecx, ebx
add ebx, ecx
sub ecx, 32
@@BwdLoopMMX:
movq mm1, [eax+ecx ]
movq mm2, [eax+ecx+ 8]
movq mm3, [eax+ecx+16]
movq mm4, [eax+ecx+24]
movq [edx+ecx+24], mm4
movq [edx+ecx+16], mm3
movq [edx+ecx+ 8], mm2
movq [edx+ecx ], mm1
sub ecx, 32
jge @@BwdLoopMMX
movq [edx+ebx-8], mm0 {Last QWORD}
emms
add ecx, 32
pop ebx
jmp SmallBackwardMove
end;
{-------------------------------------------------------------------------}
procedure LargeAlignedSSEMove;
asm
@@Loop:
movaps xmm0, [eax+ecx]
movaps xmm1, [eax+ecx+16]
movaps xmm2, [eax+ecx+32]
movaps xmm3, [eax+ecx+48]
movaps [edx+ecx], xmm0
movaps [edx+ecx+16], xmm1
movaps [edx+ecx+32], xmm2
movaps [edx+ecx+48], xmm3
movaps xmm4, [eax+ecx+64]
movaps xmm5, [eax+ecx+80]
movaps xmm6, [eax+ecx+96]
movaps xmm7, [eax+ecx+112]
movaps [edx+ecx+64], xmm4
movaps [edx+ecx+80], xmm5
movaps [edx+ecx+96], xmm6
movaps [edx+ecx+112], xmm7
add ecx, 128
js @@Loop
end;
{-------------------------------------------------------------------------}
procedure LargeUnalignedSSEMove;
asm
@@Loop:
movups xmm0, [eax+ecx]
movups xmm1, [eax+ecx+16]
movups xmm2, [eax+ecx+32]
movups xmm3, [eax+ecx+48]
movaps [edx+ecx], xmm0
movaps [edx+ecx+16], xmm1
movaps [edx+ecx+32], xmm2
movaps [edx+ecx+48], xmm3
movups xmm4, [eax+ecx+64]
movups xmm5, [eax+ecx+80]
movups xmm6, [eax+ecx+96]
movups xmm7, [eax+ecx+112]
movaps [edx+ecx+64], xmm4
movaps [edx+ecx+80], xmm5
movaps [edx+ecx+96], xmm6
movaps [edx+ecx+112], xmm7
add ecx, 128
js @@Loop
end;
{-------------------------------------------------------------------------}
procedure HugeAlignedSSEMove;
const
Prefetch = 512;
asm
@@Loop:
prefetchnta [eax+ecx+Prefetch]
prefetchnta [eax+ecx+Prefetch+64]
movaps xmm0, [eax+ecx]
movaps xmm1, [eax+ecx+16]
movaps xmm2, [eax+ecx+32]
movaps xmm3, [eax+ecx+48]
movntps [edx+ecx], xmm0
movntps [edx+ecx+16], xmm1
movntps [edx+ecx+32], xmm2
movntps [edx+ecx+48], xmm3
movaps xmm4, [eax+ecx+64]
movaps xmm5, [eax+ecx+80]
movaps xmm6, [eax+ecx+96]
movaps xmm7, [eax+ecx+112]
movntps [edx+ecx+64], xmm4
movntps [edx+ecx+80], xmm5
movntps [edx+ecx+96], xmm6
movntps [edx+ecx+112], xmm7
add ecx, 128
js @@Loop
sfence
end;
{-------------------------------------------------------------------------}
procedure HugeUnalignedSSEMove;
const
Prefetch = 512;
asm
@@Loop:
prefetchnta [eax+ecx+Prefetch]
prefetchnta [eax+ecx+Prefetch+64]
movups xmm0, [eax+ecx]
movups xmm1, [eax+ecx+16]
movups xmm2, [eax+ecx+32]
movups xmm3, [eax+ecx+48]
movntps [edx+ecx], xmm0
movntps [edx+ecx+16], xmm1
movntps [edx+ecx+32], xmm2
movntps [edx+ecx+48], xmm3
movups xmm4, [eax+ecx+64]
movups xmm5, [eax+ecx+80]
movups xmm6, [eax+ecx+96]
movups xmm7, [eax+ecx+112]
movntps [edx+ecx+64], xmm4
movntps [edx+ecx+80], xmm5
movntps [edx+ecx+96], xmm6
movntps [edx+ecx+112], xmm7
add ecx, 128
js @@Loop
sfence
end;
{-------------------------------------------------------------------------}
{Dest MUST be 16-Byes Aligned, Count MUST be multiple of 16 }
procedure LargeSSEMove;
asm
push ebx
mov ebx, ecx
and ecx, -128 {No of Bytes to Block Move (Multiple of 128)}
add eax, ecx {End of Source Blocks}
add edx, ecx {End of Dest Blocks}
neg ecx
cmp ecx, CacheLimit {Count > Limit - Use Prefetch}
jl @@Huge
test eax, 15 {Check if Both Source/Dest are Aligned}
jnz @@LargeUnaligned
call LargeAlignedSSEMove {Both Source and Dest 16-Byte Aligned}
jmp @@Remainder
@@LargeUnaligned: {Source Not 16-Byte Aligned}
call LargeUnalignedSSEMove
jmp @@Remainder
@@Huge:
test eax, 15 {Check if Both Source/Dest Aligned}
jnz @@HugeUnaligned
call HugeAlignedSSEMove {Both Source and Dest 16-Byte Aligned}
jmp @@Remainder
@@HugeUnaligned: {Source Not 16-Byte Aligned}
call HugeUnalignedSSEMove
@@Remainder:
and ebx, $7F {Remainder (0..112 - Multiple of 16)}
jz @@Done
add eax, ebx
add edx, ebx
neg ebx
@@RemainderLoop:
movups xmm0, [eax+ebx]
movaps [edx+ebx], xmm0
add ebx, 16
jnz @@RemainderLoop
@@Done:
pop ebx
end;
{-------------------------------------------------------------------------}
{Move ECX Bytes from EAX to EDX, where EAX > EDX and ECX > 36 (TINYSIZE)}
procedure Forwards_SSE;
const
SMALLSIZE = 64;
LARGESIZE = 2048;
asm
cmp ecx, SMALLSIZE
jle Forwards_IA32
push ebx
cmp ecx, LARGESIZE
jge @@FwdLargeMove
movups xmm0, [eax] {First 16 Bytes}
mov ebx, edx
add eax, ecx {Align Writes}
add ecx, edx
and edx, -16
add edx, 48
sub ecx, edx
add edx, ecx
neg ecx
nop {Align Loop}
@@FwdLoopSSE:
movups xmm1, [eax+ecx-32]
movups xmm2, [eax+ecx-16]
movaps [edx+ecx-32], xmm1
movaps [edx+ecx-16], xmm2
add ecx, 32
jle @@FwdLoopSSE
movups [ebx], xmm0 {First 16 Bytes}
neg ecx
add ecx, 32
pop ebx
jmp SmallForwardMove
@@FwdLargeMove:
mov ebx, ecx
test edx, 15
jz @@FwdLargeAligned
lea ecx, [edx+15] {16 byte Align Destination}
and ecx, -16
sub ecx, edx
add eax, ecx
add edx, ecx
sub ebx, ecx
call SmallForwardMove
mov ecx, ebx
@@FwdLargeAligned:
and ecx, -16
sub ebx, ecx {EBX = Remainder}
push edx
push eax
push ecx
call LargeSSEMove
pop ecx
pop eax
pop edx
add ecx, ebx
add eax, ecx
add edx, ecx
mov ecx, ebx
pop ebx
jmp SmallForwardMove
end;
{-------------------------------------------------------------------------}
{Move ECX Bytes from EAX to EDX, where EAX < EDX and ECX > 36 (TINYSIZE)}
procedure Backwards_SSE;
const
SMALLSIZE = 64;
asm
cmp ecx, SMALLSIZE
jle Backwards_IA32
push ebx
movups xmm0, [eax+ecx-16] {Last 16 Bytes}
lea ebx, [edx+ecx] {Align Writes}
and ebx, 15
sub ecx, ebx
add ebx, ecx
sub ecx, 32
@@BwdLoop:
movups xmm1, [eax+ecx]
movups xmm2, [eax+ecx+16]
movaps [edx+ecx], xmm1
movaps [edx+ecx+16], xmm2
sub ecx, 32
jge @@BwdLoop
movups [edx+ebx-16], xmm0 {Last 16 Bytes}
add ecx, 32
pop ebx
jmp SmallBackwardMove
end;
{-------------------------------------------------------------------------}
procedure LargeAlignedSSE2Move; {Also used in SSE3 Move}
asm
@@Loop:
movdqa xmm0, [eax+ecx]
movdqa xmm1, [eax+ecx+16]
movdqa xmm2, [eax+ecx+32]
movdqa xmm3, [eax+ecx+48]
movdqa [edx+ecx], xmm0
movdqa [edx+ecx+16], xmm1
movdqa [edx+ecx+32], xmm2
movdqa [edx+ecx+48], xmm3
movdqa xmm4, [eax+ecx+64]
movdqa xmm5, [eax+ecx+80]
movdqa xmm6, [eax+ecx+96]
movdqa xmm7, [eax+ecx+112]
movdqa [edx+ecx+64], xmm4
movdqa [edx+ecx+80], xmm5
movdqa [edx+ecx+96], xmm6
movdqa [edx+ecx+112], xmm7
add ecx, 128
js @@Loop
end;
{-------------------------------------------------------------------------}
procedure LargeUnalignedSSE2Move;