// Copyright (c) 1995-2009 Nokia Corporation and/or its subsidiary(-ies).
// All rights reserved.
// This component and the accompanying materials are made available
// under the terms of the License "Eclipse Public License v1.0"
// which accompanies this distribution, and is available
// at the URL "http://www.eclipse.org/legal/epl-v10.html".
//
// Initial Contributors:
// Nokia Corporation - initial contribution.
//
// Contributors:
//
// Description:
// e32test\mmu\t_mwait.cia
//
//
#include <e32test.h>
#include <u32std.h>
#include "d_shadow.h"
#if defined(__CPU_ARM)
#define INS8 asm(".word 0xe1a00000,0xe1a01001,0xe1a02002,0xe1a03003,0xe1a00000,0xe1a01001,0xe1a02002,0xe1a03003 ")
#define INS16 INS8 ; INS8
#define INS32 INS16 ; INS16
#define INS64 INS32 ; INS32
#define INS128 INS64 ; INS64
#elif defined(__CPU_X86)
#ifdef __GCC32__
#define INC_EAX asm("inc eax");
#else
#define INC_EAX __asm inc eax
#endif
#define INS4 INC_EAX \
INC_EAX \
INC_EAX \
INC_EAX
#define INS8 INS4 INS4
#define INS16 INS8 INS8
#define INS32 INS16 INS16
#define INS64 INS32 INS32
#define INS128 INS64 INS64
#define INS256 INS128 INS128
#define INS512 INS256 INS256
#endif
__NAKED__ TLinAddr MemSpeedTest(TInt /*aLoopSize*/, TInt& /*aCount*/)
{
#if defined(__CPU_ARM)
asm("memspeedtest: ");
__SWITCH_TO_ARM;
asm("movs r0, r0 ");
asm("beq get_function_end "); // if loopsize=0, return end address of this function
asm("mov r3, r3 ");
asm("mov r3, #0 "); // count of how many loops done
asm("adr r2, loopend ");
asm("sub r2, r2, r0 "); // r2=point to branch back to in loop
asm("loopstart: "); // from here to loopend must be 64k bytes
INS128;
INS128;
INS128;
INS128;
INS128;
INS128;
INS128;
INS128;
INS128;
INS128;
INS128;
INS128;
INS128;
INS128;
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INS128;
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INS128;
INS128;
INS128;
INS128;
INS128;
INS128;
INS128;
INS128;
INS128;
INS128;
INS128;
INS128;
INS128;
INS128;
INS128;
INS128;
INS128;
INS64;
INS32;
INS16;
INS8;
asm(".word 0xe1a00000,0xe1a01001,0xe1a02002 ");
asm("add r3, r3, #1 "); // increment counter
asm("str r3, [r1] "); // and store in aCount
__JUMP(,r2); // branch back to start of loop
asm("mov r0, r0 "); // two NOPs because of prefetch
asm("mov r0, r0 ");
asm("loopend: ");
asm("get_function_end: ");
asm("adr r0, memspeedtest_end ");
__END_ARM;
__JUMP(,lr);
asm("memspeedtest_end: ");
#elif defined(__CPU_X86)
asm("mov ecx, [esp+4]"); // ecx=loop size
asm("test ecx, ecx");
asm("jz get_function_end"); // if zero, return function end address
asm("mov edx, [esp+8]"); // edx=&aCount
asm("lea ebx, loopend");
asm("sub ebx, ecx"); // ebx=point to jump back to in loop
asm("xor ecx, ecx"); // count of loops done
asm("loopstart:"); // from here to loopend must be 64k bytes
INS512;
INS512;
INS512;
INS512;
INS512;
INS512;
INS512;
INS512;
INS512;
INS512;
INS512;
INS512;
INS512;
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INS512;
INS512;
INS512;
INS512;
INS512;
INS512;
INS512;
INS512;
INS512;
INS512;
INS256;
INS128;
INS64;
INS32;
INS16;
INS8;
asm("inc ecx"); // increment loop counter
asm("mov [edx], ecx"); // update aCount
asm("jmp ebx"); // jump back
asm("nop");
asm("nop");
asm("nop");
asm("loopend:");
asm("get_function_end:");
asm("lea eax, memspeedtest_end");
asm("ret");
asm("memspeedtest_end:");
#endif
}