// Copyright (c) 2007-2009 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:

 // e32\euser\epoc\x86\uc_realx.cia

 // 

 //

 #include "u32std.h"

 #include <e32math.h>

 void TRealXPanic(TInt aErr);

 LOCAL_C __NAKED__ void TRealXPanicEax(void)

 	{

 	asm("push eax");

 	asm("call %a0": : "i"(&TRealXPanic));

 	}

 LOCAL_C __NAKED__ void TRealXRealIndefinite(void)

 	{

 	// return 'real indefinite' NaN in ecx,edx:ebx

 	asm("mov ecx, 0xFFFF0001");	// exponent=FFFF, sign negative

 	asm("mov edx, 0xC0000000"); // mantissa=C0000000 00000000

 	asm("xor ebx, ebx");

 	asm("mov eax, -6"); // return KErrArgument

 	asm("ret");

 	}

 LOCAL_C __NAKED__ void TRealXBinOpNaN(void)

 	{

 	// generic routine to process NaN's in binary operations

 	// destination operand in ecx,edx:eax

 	// source operand at [esi]

 	asm("mov eax, [esi+8]");			// source operand into eax,edi:ebp

 	asm("mov edi, [esi+4]");

 	asm("mov ebp, [esi]");

 	asm("cmp ecx, 0xFFFF0000");			// check if dest is a NaN

 	asm("jb short TRealXBinOpNaN1");	// if not, swap them

 	asm("cmp edx, 0x80000000");

 	asm("jne short TRealXBinOpNaN2");

 	asm("test ebx, ebx");

 	asm("jne short TRealXBinOpNaN2");

 	asm("TRealXBinOpNaN1:");			// swap the operands

 	asm("xchg ecx, eax");

 	asm("xchg edx, edi");

 	asm("xchg ebx, ebp");

 	asm("TRealXBinOpNaN2:");

 	asm("cmp eax, 0xFFFF0000");			// check if both operands are NaNs

 	asm("jb short TRealXBinOpNaN4");	// if not, ignore non-NaN operand

 	asm("cmp edi, 0x80000000");

 	asm("jne short TRealXBinOpNaN3");

 	asm("test ebp, ebp");

 	asm("je short TRealXBinOpNaN4");

 	asm("TRealXBinOpNaN3:");			// if both operands are NaN's, compare significands

 	asm("cmp edx, edi");

 	asm("ja short TRealXBinOpNaN4");

 	asm("jb short TRealXBinOpNaN5");

 	asm("cmp ebx, ebp");

 	asm("jae short TRealXBinOpNaN4");

 	asm("TRealXBinOpNaN5:");			// come here if dest is smaller - copy source to dest

 	asm("mov ecx, eax");

 	asm("mov edx, edi");

 	asm("mov ebx, ebp");

 	asm("TRealXBinOpNaN4:");			// NaN with larger significand is in ecx,edx:ebx

 	asm("or edx, 0x40000000");			// convert an SNaN to a QNaN

 	asm("mov eax, -6");					// return KErrArgument

 	asm("ret");

 	}

 // Add TRealX at [esi] + ecx,edx:ebx

 // Result in ecx,edx:ebx

 // Error code in eax

 // Note:	+0 + +0 = +0, -0 + -0 = -0, +0 + -0 = -0 + +0 = +0,

 //			+/-0 + X = X + +/-0 = X, X + -X = -X + X = +0

 LOCAL_C __NAKED__ void TRealXAdd()

 	{

 	asm("xor ch, ch");				// clear rounding flags

 	asm("cmp ecx, 0xFFFF0000");		// check if dest=NaN or infinity

 	asm("jnc addfpsd");				// branch if it is

 	asm("mov eax, [esi+8]");		// fetch sign/exponent of source

 	asm("cmp eax, 0xFFFF0000");		// check if source=NaN or infinity

 	asm("jnc addfpss");				// branch if it is

 	asm("cmp eax, 0x10000");		// check if source=0

 	asm("jc addfp0s");				// branch if it is

 	asm("cmp ecx, 0x10000");		// check if dest=0

 	asm("jc addfp0d");				// branch if it is

 	asm("and cl, 1");				// clear bits 1-7 of ecx

 	asm("and al, 1");				// clear bits 1-7 of eax

 	asm("mov ch, cl");

 	asm("xor ch, al");				// xor of signs into ch bit 0

 	asm("add ch, ch");

 	asm("or cl, ch");				// and into cl bit 1

 	asm("or al, ch");				// and al bit 1

 	asm("xor ch, ch");				// clear rounding flags

 	asm("mov ebp, [esi]");			// fetch source mantissa 0-31

 	asm("mov edi, [esi+4]");		// fetch source mantissa 32-63

 	asm("ror ecx, 16");				// dest exponent into cx

 	asm("ror eax, 16");				// source exponent into ax

 	asm("push ecx");				// push dest exponent/sign

 	asm("sub cx, ax");				// cx = dest exponent - source exponent

 	asm("je short addfp3b");		// if equal, no shifting required

 	asm("ja short addfp1");			// branch if dest exponent >= source exponent

 	asm("xchg ebx, ebp");			// make sure edi:ebp contains the mantissa to be shifted

 	asm("xchg edx, edi");			

 	asm("xchg eax, [esp]");			// and larger exponent and corresponding sign is on the stack

 	asm("neg cx");					// make cx positive = number of right shifts needed

 	asm("addfp1:");

 	asm("cmp cx, 64");				// if more than 64 shifts needed

 	asm("ja addfp2");				// branch to output larger number

 	asm("jb addfp3");				// branch if <64 shifts

 	asm("mov eax, edi");			// exactly 64 shifts needed - rounding word=mant high

 	asm("test ebp, ebp");			// check bits lost

 	asm("jz short addfp3a");

 	asm("or ch, 1");				// if not all zero, set rounded-down flag

 	asm("addfp3a:");

 	asm("xor edi, edi");			// clear edx:ebx

 	asm("xor ebp, ebp");			

 	asm("jmp short addfp5");		// finished shifting

 	asm("addfp3b:");				// exponents equal

 	asm("xor eax, eax");			// set rounding word=0

 	asm("jmp short addfp5");

 	asm("addfp3:");

 	asm("cmp cl, 32");				// 32 or more shifts needed ?

 	asm("jb short addfp4");			// skip if <32

 	asm("mov eax, ebp");			// rounding word=mant low

 	asm("mov ebp, edi");			// mant low=mant high

 	asm("xor edi, edi");			// mant high=0

 	asm("sub cl, 32");				// reduce count by 32

 	asm("jz short addfp5");			// if now zero, finished shifting

 	asm("shrd edi, eax, cl");		// shift ebp:eax:edi right by cl bits

 	asm("shrd eax, ebp, cl");		//

 	asm("shr ebp, cl");				//

 	asm("test edi, edi");			// check bits lost in shift

 	asm("jz short addfp5");			// if all zero, finished

 	asm("or ch, 1");				// else set rounded-down flag

 	asm("xor edi, edi");			// clear edx again

 	asm("jmp short addfp5");		// finished shifting

 	asm("addfp4:");					// <32 shifts needed now

 	asm("xor eax, eax");			// clear rounding word initially

 	asm("shrd eax, ebp, cl");		// shift edi:ebp:eax right by cl bits

 	asm("shrd ebp, edi, cl");		//

 	asm("shr edi, cl");				//

 	asm("addfp5:");

 	asm("mov [esp+3], ch");			// rounding flag into ch image on stack

 	asm("pop ecx");					// recover sign and exponent into ecx, with rounding flag

 	asm("ror ecx, 16");				// into normal position

 	asm("test cl, 2");				// addition or subtraction needed ?

 	asm("jnz short subfp1");		// branch if subtraction

 	asm("add ebx,ebp");				// addition required - add mantissas

 	asm("adc edx,edi");				//

 	asm("jnc short roundfp");		// branch if no carry

 	asm("rcr edx,1");				// shift carry right into mantissa

 	asm("rcr ebx,1");				//

 	asm("rcr eax,1");				// and into rounding word

 	asm("jnc short addfp5a");

 	asm("or ch, 1");				// if 1 shifted out, set rounded-down flag

 	asm("addfp5a:");

 	asm("add ecx, 0x10000");		// and increment exponent

 	// perform rounding based on rounding word in eax and rounding flag in ch

 	asm("roundfp:");

 	asm("cmp eax, 0x80000000");		

 	asm("jc roundfp0");				// if rounding word<80000000, round down

 	asm("ja roundfp1");				// if >80000000, round up

 	asm("test ch, 1");

 	asm("jnz short roundfp1");		// if rounded-down flag set, round up

 	asm("test ch, 2");

 	asm("jnz short roundfp0");		// if rounded-up flag set, round down

 	asm("test bl, 1");				// else test mantissa lsb

 	asm("jz short roundfp0");		// round down if 0, up if 1 [round to even]

 	asm("roundfp1:");				// Come here to round up

 	asm("add ebx, 1");				// increment mantissa

 	asm("adc edx,0");				//

 	asm("jnc roundfp1a");			// if no carry OK

 	asm("rcr edx,1");				// else shift carry into mantissa [edx:ebx=0 here]

 	asm("add ecx, 0x10000");		// and increment exponent

 	asm("roundfp1a:");

 	asm("cmp ecx, 0xFFFF0000");		// check for overflow

 	asm("jae short addfpovfw");		// jump if overflow

 	asm("mov ch, 2");				// else set rounded-up flag

 	asm("xor eax, eax");			// return KErrNone

 	asm("ret");

 	asm("roundfp0:");				// Come here to round down

 	asm("cmp ecx, 0xFFFF0000");		// check for overflow

 	asm("jae short addfpovfw");		// jump if overflow

 	asm("test eax, eax");			// else check if rounding word zero

 	asm("jz short roundfp0a");		// if so, leave rounding flags as they are

 	asm("mov ch, 1");				// else set rounded-down flag

 	asm("roundfp0a:");				

 	asm("xor eax, eax");			// return KErrNone

 	asm("ret");

 	asm("addfpovfw:");				// Come here if overflow occurs

 	asm("xor ch, ch");				// clear rounding flags, exponent=FFFF

 	asm("xor ebx, ebx");

 	asm("mov edx, 0x80000000");		// mantissa=80000000 00000000 for infinity

 	asm("mov eax, -9");				// return KErrOverflow

 	asm("ret");

 	// exponents differ by more than 64 - output larger number

 	asm("addfp2:");					

 	asm("pop ecx");					// recover exponent and sign

 	asm("ror ecx, 16");				// into normal position

 	asm("or ch, 1");				// set rounded-down flag

 	asm("test cl, 2");				// check if signs the same

 	asm("jz addfp2a");

 	asm("xor ch, 3");				// if not, set rounded-up flag

 	asm("addfp2a:");

 	asm("xor eax, eax");			// return KErrNone

 	asm("ret");

 	// signs differ, so must subtract mantissas

 	asm("subfp1:");

 	asm("add ch, ch");				// if rounded-down flag set, change it to rounded-up

 	asm("neg eax");					// subtract rounding word from 0

 	asm("sbb ebx, ebp");			// and subtract mantissas with borrow

 	asm("sbb edx, edi");			//

 	asm("jnc short subfp2");		// if no borrow, sign is correct

 	asm("xor cl, 1");				// else change sign of result

 	asm("shr ch, 1");				// change rounding back to rounded-down

 	asm("not eax");					// negate rounding word

 	asm("not ebx");					// and mantissa

 	asm("not edx");					//

 	asm("add eax,1");				// two's complement negation

 	asm("adc ebx,0");				//

 	asm("adc edx,0");				//

 	asm("subfp2:");

 	asm("jnz short subfp3");		// branch if edx non-zero at this point

 	asm("mov edx, ebx");			// else shift ebx into edx

 	asm("or edx, edx");				//

 	asm("jz short subfp4");			// if still zero, branch

 	asm("mov ebx, eax");			// else shift rounding word into ebx

 	asm("xor eax, eax");			// and zero rounding word

 	asm("sub ecx, 0x200000");		// decrease exponent by 32 due to shift

 	asm("jnc short subfp3");		// if no borrow, carry on

 	asm("jmp short subfpundflw");	// if borrow here, underflow

 	asm("subfp4:");

 	asm("mov edx, eax");			// move rounding word into edx

 	asm("or edx, edx");				// is edx still zero ?

 	asm("jz short subfp0");			// if so, result is precisely zero

 	asm("xor ebx, ebx");			// else zero ebx and rounding word

 	asm("xor eax, eax");			//

 	asm("sub ecx, 0x400000");		// and decrease exponent by 64 due to shift

 	asm("jc short subfpundflw");	// if borrow, underflow

 	asm("subfp3:");

 	asm("mov edi, ecx");			// preserve sign and exponent

 	asm("bsr ecx, edx");			// position of most significant 1 into ecx

 	asm("neg ecx");					//

 	asm("add ecx, 31");				// cl = 31-position of MS 1 = number of shifts to normalise

 	asm("shld edx, ebx, cl");		// shift edx:ebx:eax left by cl bits

 	asm("shld ebx, eax, cl");		//

 	asm("shl eax, cl");				//

 	asm("mov ebp, ecx");			// bit count into ebp for subtraction

 	asm("shl ebp, 16");				// shift left by 16 to align with exponent

 	asm("mov ecx, edi");			// exponent, sign, rounding flags back into ecx

 	asm("sub ecx, ebp");			// subtract shift count from exponent

 	asm("jc short subfpundflw");	// if borrow, underflow

 	asm("cmp ecx, 0x10000");		// check if exponent 0

 	asm("jnc roundfp");				// if not, jump to round result, else underflow

 	// come here if underflow

 	asm("subfpundflw:");			

 	asm("and ecx, 1");				// set exponent to zero, leave sign

 	asm("xor edx, edx");

 	asm("xor ebx, ebx");

 	asm("mov eax, -10");			// return KErrUnderflow

 	asm("ret");

 	// come here to return zero result

 	asm("subfp0:");

 	asm("xor ecx, ecx");			// set exponent to zero, positive sign

 	asm("xor edx, edx");

 	asm("xor ebx, ebx");

 	asm("addfp0snzd:");

 	asm("xor eax, eax");			// return KErrNone

 	asm("ret");

 	// come here if source=0 - eax=source exponent/sign

 	asm("addfp0s:");

 	asm("cmp ecx, 0x10000");		// check if dest=0

 	asm("jnc addfp0snzd");			// if not, return dest unaltered

 	asm("and ecx, eax");			// else both zero, result negative iff both zeros negative

 	asm("and ecx, 1");

 	asm("xor eax, eax");			// return KErrNone

 	asm("ret");

 	// come here if dest=0, source nonzero

 	asm("addfp0d:");

 	asm("mov ebx, [esi]");			// return source unaltered

 	asm("mov edx, [esi+4]");

 	asm("mov ecx, [esi+8]");

 	asm("xor eax, eax");			// return KErrNone

 	asm("ret");

 	// come here if dest=NaN or infinity

 	asm("addfpsd:");

 	asm("cmp edx, 0x80000000");		// check for infinity

 	_ASM_jn(e,TRealXBinOpNaN)		// branch if NaN

 	asm("test ebx, ebx");

 	_ASM_jn(e,TRealXBinOpNaN)

 	asm("mov eax, [esi+8]");		// eax=second operand exponent

 	asm("cmp eax, 0xFFFF0000");		// check second operand for NaN or infinity

 	asm("jae short addfpsd1");		// branch if NaN or infinity

 	asm("addfpsd2:");

 	asm("mov eax, -9");				// else return dest unaltered [infinity] and KErrOverflow

 	asm("ret");

 	asm("addfpsd1:");

 	asm("mov ebp, [esi]");			// source mantissa into edi:ebp

 	asm("mov edi, [esi+4]");

 	asm("cmp edi, 0x80000000");		// check for infinity

 	_ASM_jn(e,TRealXBinOpNaN)		// branch if NaN

 	asm("test ebp, ebp");

 	_ASM_jn(e,TRealXBinOpNaN)

 	asm("xor al, cl");				// both operands are infinity - check signs

 	asm("test al, 1");

 	asm("jz short addfpsd2");		// if both the same, return KErrOverflow

 	asm("jmp %a0": : "i"(&TRealXRealIndefinite));		// else return 'real indefinite'

 	// come here if source=NaN or infinity, dest finite

 	asm("addfpss:");

 	asm("mov ebp, [esi]");			// source mantissa into edi:ebp

 	asm("mov edi, [esi+4]");

 	asm("cmp edi, 0x80000000");		// check for infinity

 	_ASM_jn(e,TRealXBinOpNaN)		// branch if NaN

 	asm("test ebp, ebp");

 	_ASM_jn(e,TRealXBinOpNaN)

 	asm("mov ecx, eax");			// if source=infinity, return source unaltered

 	asm("mov edx, edi");

 	asm("mov ebx, ebp");

 	asm("mov eax, -9");				// return KErrOverflow

 	asm("ret");

 	}

 // Subtract TRealX at [esi] - ecx,edx:ebx

 // Result in ecx,edx:ebx

 // Error code in eax

 LOCAL_C __NAKED__ void TRealXSubtract()

 	{

 	asm("xor cl, 1");				// negate subtrahend

 	asm("jmp %a0": :"i"(&TRealXAdd));

 	}

 // Multiply TRealX at [esi] * ecx,edx:ebx

 // Result in ecx,edx:ebx

 // Error code in eax

 LOCAL_C __NAKED__ void TRealXMultiply()

 	{

 	asm("xor ch, ch");				// clear rounding flags

 	asm("mov eax, [esi+8]");		// fetch sign/exponent of source

 	asm("xor cl, al");				// xor signs

 	asm("cmp ecx, 0xFFFF0000");		// check if dest=NaN or infinity

 	asm("jnc mulfpsd");				// branch if it is

 	asm("cmp eax, 0xFFFF0000");		// check if source=NaN or infinity

 	asm("jnc mulfpss");				// branch if it is

 	asm("cmp eax, 0x10000");		// check if source=0

 	asm("jc mulfp0");				// branch if it is

 	asm("cmp ecx, 0x10000");		// check if dest=0

 	asm("jc mulfp0");				// branch if it is

 	asm("push ecx");				// save result sign

 	asm("shr ecx, 16");				// dest exponent into cx

 	asm("shr eax, 16");				// source exponent into ax

 	asm("add eax, ecx");			// add exponents

 	asm("sub eax, 0x7FFE");			// eax now contains result exponent

 	asm("push eax");				// save it

 	asm("mov edi, edx");			// save dest mantissa high

 	asm("mov eax, ebx");			// dest mantissa low -> eax

 	asm("mul dword ptr [esi]");		// dest mantissa low * source mantissa low -> edx:eax

 	asm("xchg ebx, eax");			// result dword 0 -> ebx, dest mant low -> eax

 	asm("mov ebp, edx");			// result dword 1 -> ebp

 	asm("mul dword ptr [esi+4]");	// dest mant low * src mant high -> edx:eax

 	asm("add ebp, eax");			// add in partial product to dwords 1 and 2

 	asm("adc edx, 0");				//

 	asm("mov ecx, edx");			// result dword 2 -> ecx

 	asm("mov eax, edi");			// dest mant high -> eax

 	asm("mul dword ptr [esi+4]");	// dest mant high * src mant high -> edx:eax

 	asm("add ecx, eax");			// add in partial product to dwords 2, 3

 	asm("adc edx, 0");				//

 	asm("mov eax, edi");			// dest mant high -> eax

 	asm("mov edi, edx");			// result dword 3 -> edi

 	asm("mul dword ptr [esi]");		// dest mant high * src mant low -> edx:eax

 	asm("add ebp, eax");			// add in partial product to dwords 1, 2

 	asm("adc ecx, edx");			//

 	asm("adc edi, 0");				// 128-bit mantissa product is now in edi:ecx:ebp:ebx

 	asm("mov edx, edi");			// top 64 bits into edx:ebx

 	asm("mov edi, ebx");			

 	asm("mov ebx, ecx");			// bottom 64 bits now in ebp:edi

 	asm("pop ecx");					// recover exponent

 	asm("js short mulfp1");			// skip if mantissa normalised

 	asm("add edi, edi");			// else shift left [only one shift will be needed]

 	asm("adc ebp, ebp");

 	asm("adc ebx, ebx");

 	asm("adc edx, edx");

 	asm("dec ecx");					// and decrement exponent

 	asm("mulfp1:");

 	asm("cmp ebp, 0x80000000");		// compare bottom 64 bits with 80000000 00000000 for rounding

 	asm("ja short mulfp2");			// branch to round up

 	asm("jb short mulfp3");			// branch to round down

 	asm("test edi, edi");

 	asm("jnz short mulfp2");		// branch to round up

 	asm("test bl, 1");				// if exactly half-way, test LSB of result mantissa

 	asm("jz short mulfp4");			// if LSB=0, round down [round to even]

 	asm("mulfp2:");

 	asm("add ebx, 1");				// round up - increment mantissa

 	asm("adc edx, 0");

 	asm("jnc short mulfp2a");

 	asm("rcr edx, 1");

 	asm("inc ecx");	

 	asm("mulfp2a:");

 	asm("mov al, 2");				// set rounded-up flag

 	asm("jmp short mulfp5");

 	asm("mulfp3:");					// round down

 	asm("xor al, al");				// clear rounding flags

 	asm("or ebp, edi");				// check for exact result

 	asm("jz short mulfp5");			// skip if exact

 	asm("mulfp4:");					// come here to round down when we know result inexact

 	asm("mov al, 1");				// else set rounded-down flag

 	asm("mulfp5:");					// final mantissa now in edx:ebx, exponent in ecx

 	asm("cmp ecx, 0xFFFF");			// check for overflow

 	asm("jge short mulfp6");		// branch if overflow

 	asm("cmp ecx, 0");				// check for underflow

 	asm("jle short mulfp7");		// branch if underflow

 	asm("shl ecx, 16");				// else exponent up to top end of ecx

 	asm("mov ch, al");				// rounding flags into ch

 	asm("pop eax");					// recover result sign

 	asm("mov cl, al");				// into cl

 	asm("xor eax, eax");			// return KErrNone

 	asm("ret");

 	// come here if overflow

 	asm("mulfp6:");					

 	asm("pop eax");					// recover result sign

 	asm("mov ecx, 0xFFFF0000");		// exponent=FFFF

 	asm("mov cl, al");				// sign into cl

 	asm("mov edx, 0x80000000");		// set mantissa to 80000000 00000000 for infinity

 	asm("xor ebx, ebx");

 	asm("mov eax, -9");				// return KErrOverflow

 	asm("ret");

 	// come here if underflow

 	asm("mulfp7:");				

 	asm("pop eax");					// recover result sign

 	asm("xor ecx, ecx");			// exponent=0

 	asm("mov cl, al");				// sign into cl

 	asm("xor edx, edx");

 	asm("xor ebx, ebx");

 	asm("mov eax, -10");			// return KErrUnderflow

 	asm("ret");

 	// come here if either operand zero

 	asm("mulfp0:");

 	asm("and ecx, 1");				// set exponent=0, keep sign

 	asm("xor edx, edx");

 	asm("xor ebx, ebx");

 	asm("xor eax, eax");			// return KErrNone

 	asm("ret");

 	// come here if destination operand NaN or infinity

 	asm("mulfpsd:");

 	asm("cmp edx, 0x80000000");		// check for infinity

 	_ASM_jn(e,TRealXBinOpNaN)		// branch if NaN

 	asm("test ebx, ebx");

 	_ASM_jn(e,TRealXBinOpNaN)

 	asm("cmp eax, 0xFFFF0000");		// check second operand for NaN or infinity

 	asm("jae short mulfpsd1");		// branch if NaN or infinity

 	asm("cmp eax, 0x10000");		// check if second operand zero

 	_ASM_j(c,TRealXRealIndefinite)	// if so, return 'real indefinite'

 	asm("mov eax, -9");				// else return dest [infinity] with xor sign and KErrOverflow

 	asm("ret");

 	asm("mulfpsd1:");

 	asm("mov ebp, [esi]");			// source mantissa into edi:ebp

 	asm("mov edi, [esi+4]");		

 	asm("cmp edi, 0x80000000");		// check for infinity

 	_ASM_jn(e,TRealXBinOpNaN)		// branch if NaN

 	asm("test ebp, ebp");

 	_ASM_jn(e,TRealXBinOpNaN)

 	asm("mov eax, -9");				// both operands infinity - return infinity with xor sign

 	asm("ret");						// and KErrOverflow

 	// come here if source operand NaN or infinity, destination finite

 	asm("mulfpss:");

 	asm("mov ebp, [esi]");			// source mantissa into edi:ebp

 	asm("mov edi, [esi+4]");

 	asm("cmp edi, 0x80000000");		// check for infinity

 	_ASM_jn(e,TRealXBinOpNaN)		// branch if NaN

 	asm("test ebp, ebp");

 	_ASM_jn(e,TRealXBinOpNaN)

 	asm("cmp ecx, 0x10000");		// source=infinity, check if dest=0

 	_ASM_j(c,TRealXRealIndefinite)	// if so, return 'real indefinite'

 	asm("or ecx, 0xFFFF0000");		// set exp=FFFF, leave xor sign in cl

 	asm("mov edx, edi");			// set mantissa for infinity

 	asm("mov ebx, ebp");

 	asm("mov eax, -9");				// return KErrOverflow

 	asm("ret");

 	}

 // Divide 96-bit unsigned dividend EDX:EAX:0 by 64-bit unsigned divisor ECX:EBX

 // Assume ECX bit 31 = 1, ie 2^63 <= divisor < 2^64

 // Assume the quotient fits in 32 bits

 // Return 32 bit quotient in EDI

 // Return 64 bit remainder in EBP:ESI

 LOCAL_C __NAKED__ void LongDivide(void)

 	{

 	asm("push edx");				// save dividend

 	asm("push eax");				//

 	asm("cmp edx, ecx");			// check if truncation of divisor will overflow DIV instruction

 	asm("jb short longdiv1");		// skip if not

 	asm("xor eax, eax");			// else return quotient of 0xFFFFFFFF

 	asm("dec eax");					//

 	asm("jmp short longdiv2");		//

 	asm("longdiv1:");

 	asm("div ecx");					// divide EDX:EAX by ECX to give approximate quotient in EAX

 	asm("longdiv2:");

 	asm("mov edi, eax");			// save approx quotient

 	asm("mul ebx");					// multiply approx quotient by full divisor ECX:EBX

 	asm("mov esi, eax");			// first partial product into EBP:ESI

 	asm("mov ebp, edx");			//

 	asm("mov eax, edi");			// approx quotient back into eax

 	asm("mul ecx");					// upper partial product now in EDX:EAX

 	asm("add eax, ebp");			// add to form 96-bit product in EDX:EAX:ESI

 	asm("adc edx, 0");				//

 	asm("neg esi");					// remainder = dividend - approx quotient * divisor

 	asm("mov ebp, [esp]");			// fetch dividend bits 32-63

 	asm("sbb ebp, eax");			//

 	asm("mov eax, [esp+4]");		// fetch dividend bits 64-95

 	asm("sbb eax, edx");			// remainder is now in EAX:EBP:ESI

 	asm("jns short longdiv4");		// if remainder positive, quotient is correct, so exit

 	asm("longdiv3:");

 	asm("dec edi");					// else quotient is too big, so decrement it

 	asm("add esi, ebx");			// and add divisor to remainder

 	asm("adc ebp, ecx");			//

 	asm("adc eax, 0");				//

 	asm("js short longdiv3");		// if still negative, repeat [requires <4 iterations]

 	asm("longdiv4:");

 	asm("add esp, 8");				// remove dividend from stack

 	asm("ret");						// return with quotient in EDI, remainder in EBP:ESI

 	}

 // Divide TRealX at [esi] / ecx,edx:ebx

 // Result in ecx,edx:ebx

 // Error code in eax

 LOCAL_C __NAKED__ void TRealXDivide(void)

 	{

 	asm("xor ch, ch");				// clear rounding flags

 	asm("mov eax, [esi+8]");		// fetch sign/exponent of dividend

 	asm("xor cl, al");				// xor signs

 	asm("cmp eax, 0xFFFF0000");		// check if dividend=NaN or infinity

 	asm("jnc divfpss");				// branch if it is

 	asm("cmp ecx, 0xFFFF0000");		// check if divisor=NaN or infinity

 	asm("jnc divfpsd");				// branch if it is

 	asm("cmp ecx, 0x10000");		// check if divisor=0

 	asm("jc divfpdv0");				// branch if it is

 	asm("cmp eax, 0x10000");		// check if dividend=0

 	asm("jc divfpdd0");				// branch if it is

 	asm("push esi");				// save pointer to dividend

 	asm("push ecx");				// save result sign

 	asm("shr ecx, 16");				// divisor exponent into cx

 	asm("shr eax, 16");				// dividend exponent into ax

 	asm("sub eax, ecx");			// subtract exponents

 	asm("add eax, 0x7FFE");			// eax now contains result exponent

 	asm("push eax");				// save it

 	asm("mov ecx, edx");			// divisor mantissa into ecx:ebx

 	asm("mov edx, [esi+4]");		// dividend mantissa into edx:eax

 	asm("mov eax, [esi]");			

 	asm("xor edi, edi");			// clear edi initially

 	asm("cmp edx, ecx");			// compare EDX:EAX with ECX:EBX

 	asm("jb short divfp1");			// if EDX:EAX < ECX:EBX, leave everything as is

 	asm("ja short divfp2");			//

 	asm("cmp eax, ebx");			// if EDX=ECX, then compare ls dwords

 	asm("jb short divfp1");			// if dividend mant < divisor mant, leave everything as is

 	asm("divfp2:");

 	asm("sub eax, ebx");			// else dividend mant -= divisor mant

 	asm("sbb edx, ecx");			//

 	asm("inc edi");					// and EDI=1 [bit 0 of EDI is the integer part of the result]

 	asm("inc dword ptr [esp]");		// also increment result exponent

 	asm("divfp1:");

 	asm("push edi");				// save top bit of result

 	asm("call %a0": : "i"(&LongDivide));	// divide EDX:EAX:0 by ECX:EBX to give next 32 bits of result in EDI

 	asm("push edi");				// save next 32 bits of result

 	asm("mov edx, ebp");			// remainder from EBP:ESI into EDX:EAX

 	asm("mov eax, esi");			//

 	asm("call %a0": : "i"(&LongDivide));	// divide EDX:EAX:0 by ECX:EBX to give next 32 bits of result in EDI

 	asm("test byte ptr [esp+4], 1");	// test integer bit of result

 	asm("jnz short divfp4");		// if set, no need to calculate another bit

 	asm("xor eax, eax");			//

 	asm("add esi, esi");			// 2*remainder into EAX:EBP:ESI

 	asm("adc ebp, ebp");			//

 	asm("adc eax, eax");			//

 	asm("sub esi, ebx");			// subtract divisor to generate final quotient bit

 	asm("sbb ebp, ecx");			//

 	asm("sbb eax, 0");				//

 	asm("jnc short divfp3");		// skip if no borrow - in this case eax=0

 	asm("add esi, ebx");			// if borrow add back - final remainder now in EBP:ESI

 	asm("adc ebp, ecx");			//

 	asm("adc eax, 0");				// eax will be zero after this and carry will be set

 	asm("divfp3:");

 	asm("cmc");						// final bit = 1-C

 	asm("rcr eax, 1");				// shift it into eax bit 31

 	asm("mov ebx, edi");			// result into EDX:EBX:EAX, remainder in EBP:ESI

 	asm("pop edx");

 	asm("add esp, 4");				// discard integer bit [zero]

 	asm("jmp short divfp5");		// branch to round

 	asm("divfp4:");					// integer bit was set

 	asm("mov ebx, edi");			// result into EDX:EBX:EAX

 	asm("pop edx");					//

 	asm("pop eax");					// integer part of result into eax [=1]

 	asm("stc");						// shift a 1 into top end of mantissa

 	asm("rcr edx,1");				//

 	asm("rcr ebx,1");				//

 	asm("rcr eax,1");				// bottom bit into eax bit 31

 	// when we get to here we have 65 bits of quotient mantissa in

 	// EDX:EBX:EAX (bottom bit in eax bit 31)

 	// and the remainder is in EBP:ESI

 	asm("divfp5:");

 	asm("pop ecx");					// recover result exponent

 	asm("add eax, eax");			// test rounding bit

 	asm("jnc short divfp6");		// branch to round down

 	asm("or ebp, esi");				// test remainder to see if we are exactly half-way

 	asm("jnz short divfp7");		// if not, round up

 	asm("test bl, 1");				// exactly halfway - test LSB of mantissa

 	asm("jz short divfp8");			// round down if LSB=0 [round to even]

 	asm("divfp7:");

 	asm("add ebx, 1");				// round up - increment mantissa

 	asm("adc edx, 0");

 	asm("jnc short divfp7a");

 	asm("rcr edx, 1");				// if carry, shift 1 into mantissa MSB

 	asm("inc ecx");					// and increment exponent

 	asm("divfp7a:");

 	asm("mov al, 2");				// set rounded-up flag

 	asm("jmp short divfp9");

 	asm("divfp6:");

 	asm("xor al, al");				// round down - first clear rounding flags

 	asm("or ebp, esi");				// test if result exact

 	asm("jz short divfp9");			// skip if exact

 	asm("divfp8:");					// come here to round down when we know result is inexact

 	asm("mov al, 1");				// set rounded-down flag

 	asm("divfp9:");					// final mantissa now in edx:ebx, exponent in ecx

 	asm("cmp ecx, 0xFFFF");			// check for overflow

 	asm("jge short divfp10");		// branch if overflow

 	asm("cmp ecx, 0");				// check for underflow

 	asm("jle short divfp11");		// branch if underflow

 	asm("shl ecx, 16");				// else exponent up to top end of ecx

 	asm("mov ch, al");				// rounding flags into ch

 	asm("pop eax");					// recover result sign

 	asm("mov cl, al");				// into cl

 	asm("pop esi");					// recover dividend pointer

 	asm("xor eax, eax");			// return KErrNone

 	asm("ret");

 	// come here if overflow

 	asm("divfp10:");

 	asm("pop eax");					// recover result sign

 	asm("mov ecx, 0xFFFF0000");		// exponent=FFFF

 	asm("mov cl, al");				// sign into cl

 	asm("mov edx, 0x80000000");		// set mantissa to 80000000 00000000 for infinity

 	asm("xor ebx, ebx");

 	asm("mov eax, -9");				// return KErrOverflow

 	asm("pop esi");					// recover dividend pointer

 	asm("ret");

 	// come here if underflow

 	asm("divfp11:");	

 	asm("pop eax");					// recover result sign

 	asm("xor ecx, ecx");			// exponent=0

 	asm("mov cl, al");				// sign into cl

 	asm("xor edx, edx");

 	asm("xor ebx, ebx");

 	asm("mov eax, -10");			// return KErrUnderflow

 	asm("pop esi");					// recover dividend pointer

 	asm("ret");

 	// come here if divisor=0, dividend finite

 	asm("divfpdv0:");

 	asm("cmp eax, 0x10000");		// check if dividend also zero

 	_ASM_j(c,TRealXRealIndefinite)	// if so, return 'real indefinite'

 	asm("or ecx, 0xFFFF0000");		// else set exponent=FFFF, leave xor sign in cl

 	asm("mov edx, 0x80000000");		// set mantissa for infinity

 	asm("xor ebx, ebx");

 	asm("mov eax, -41");			// return KErrDivideByZero

 	asm("ret");

 	// come here if dividend=0, divisor finite and nonzero

 	asm("divfpdd0:");

 	asm("and ecx, 1");				// exponent=0, leave xor sign in cl

 	asm("xor eax, eax");			// return KErrNone

 	asm("ret");

 	// come here if dividend is a NaN or infinity

 	asm("divfpss:");

 	asm("mov ebp, [esi]");			// dividend mantissa into edi:ebp

 	asm("mov edi, [esi+4]");

 	asm("cmp edi, 0x80000000");		// check for infinity

 	_ASM_jn(e,TRealXBinOpNaN)		// branch if NaN

 	asm("test ebp, ebp");

 	_ASM_jn(e,TRealXBinOpNaN)

 	asm("cmp ecx, 0xFFFF0000");		// check divisor for NaN or infinity

 	asm("jae short divfpss1");		// branch if NaN or infinity

 	asm("or ecx, 0xFFFF0000");		// infinity/finite - return infinity with xor sign

 	asm("mov edx, 0x80000000");

 	asm("xor ebx, ebx");

 	asm("mov eax, -9");				// return KErrOverflow

 	asm("ret");

 	asm("divfpss1:");

 	asm("cmp edx, 0x80000000");		// check for infinity

 	_ASM_jn(e,TRealXBinOpNaN)		// branch if NaN

 	asm("test ebx, ebx");

 	_ASM_jn(e,TRealXBinOpNaN)

 	asm("jmp %a0": : "i"(&TRealXRealIndefinite)); // if both operands infinite, return 'real indefinite'

 	// come here if divisor is a NaN or infinity, dividend finite

 	asm("divfpsd:");

 	asm("cmp edx, 0x80000000");		// check for infinity

 	_ASM_jn(e,TRealXBinOpNaN)		// branch if NaN

 	asm("test ebx, ebx");

 	_ASM_jn(e,TRealXBinOpNaN)

 	asm("and ecx, 1");				// dividend is finite, divisor=infinity, so return 0 with xor sign

 	asm("xor edx, edx");

 	asm("xor ebx, ebx");

 	asm("xor eax, eax");			// return KErrNone

 	asm("ret");

 	}

 // TRealX modulo - dividend at [esi], divisor in ecx,edx:ebx

 // Result in ecx,edx:ebx

 // Error code in eax

 LOCAL_C __NAKED__ void TRealXModulo(void)

 	{

 	asm("mov eax, [esi+8]");		// fetch sign/exponent of dividend

 	asm("mov cl, al");				// result sign=dividend sign

 	asm("xor ch, ch");				// clear rounding flags

 	asm("cmp eax, 0xFFFF0000");		// check if dividend=NaN or infinity

 	asm("jnc short modfpss");		// branch if it is

 	asm("cmp ecx, 0xFFFF0000");		// check if divisor=NaN or infinity

 	asm("jnc short modfpsd");		// branch if it is

 	asm("cmp ecx, 0x10000");		// check if divisor=0

 	_ASM_j(c,TRealXRealIndefinite)	// if so, return 'real indefinite'

 	asm("shr eax, 16");				// ax=dividend exponent

 	asm("ror ecx, 16");				// cx=divisor exponent

 	asm("sub ax, cx");				// ax=dividend exponent-divisor exponent

 	asm("jc short modfpdd0");		// if dividend exponent is smaller, return dividend

 	asm("cmp ax, 64");				// check if exponents differ by >= 64 bits

 	asm("jnc short modfplp");		// if so, underflow

 	asm("mov ah, 0");				// ah bit 0 acts as 65th accumulator bit

 	asm("mov ebp, [esi]");			// edi:ebp=dividend mantissa

 	asm("mov edi, [esi+4]");		//

 	asm("jmp short modfp2");		// skip left shift on first iteration

 	asm("modfp1:");

 	asm("add ebp, ebp");			// shift accumulator left [65 bits]

 	asm("adc edi, edi");

 	asm("adc ah, ah");

 	asm("modfp2:");

 	asm("sub ebp, ebx");			// subtract divisor from dividend

 	asm("sbb edi, edx");

 	asm("sbb ah, 0");

 	asm("jnc short modfp3");		// skip if no borrow

 	asm("add ebp, ebx");			// else add back

 	asm("adc edi, edx");

 	asm("adc ah, 0");

 	asm("modfp3:");

 	asm("dec al");					// any more bits to do?

 	asm("jns short modfp1");		// loop if there are

 	asm("mov edx, edi");			// result mantissa [not yet normalised] into edx:ebx

 	asm("mov ebx, ebp");

 	asm("or edi, ebx");				// check for zero

 	asm("jz short modfp0");			// jump if result zero

 	asm("or edx, edx");				// check if ms dword zero

 	asm("jnz short modfp4");

 	asm("mov edx, ebx");			// if so, shift left by 32

 	asm("xor ebx, ebx");

 	asm("sub cx, 32");				// and decrement exponent by 32

 	asm("jbe short modfpund");		// if borrow or exponent zero, underflow

 	asm("modfp4:");

 	asm("mov edi, ecx");			// preserve sign and exponent

 	asm("bsr ecx, edx");			// position of most significant 1 into ecx

 	asm("neg ecx");					//

 	asm("add ecx, 31");				// cl = 31-position of MS 1 = number of shifts to normalise

 	asm("shld edx, ebx, cl");		// shift edx:ebx left by cl bits

 	asm("shl ebx, cl");				//

 	asm("mov ebp, ecx");			// bit count into ebp for subtraction

 	asm("mov ecx, edi");			// exponent & sign back into ecx

 	asm("sub cx, bp");				// subtract shift count from exponent

 	asm("jbe short modfpund");		// if borrow or exponent 0, underflow

 	asm("rol ecx, 16");				// else ecx=exponent:sign

 	asm("xor eax, eax");			// normal exit, result in ecx,edx:ebx

 	asm("ret");

 	// dividend=NaN or infinity

 	asm("modfpss:");

 	asm("mov ebp, [esi]");			// dividend mantissa into edi:ebp

 	asm("mov edi, [esi+4]");

 	asm("cmp edi, 0x80000000");		// check for infinity

 	_ASM_jn(e,TRealXBinOpNaN)		// branch if NaN

 	asm("test ebp, ebp");

 	_ASM_jn(e,TRealXBinOpNaN)

 	asm("cmp ecx, 0xFFFF0000");		// check divisor for NaN or infinity

 	_ASM_j(b,TRealXRealIndefinite)	// infinity%finite - return 'real indefinite'

 	asm("cmp edx, 0x80000000");		// check for divisor=infinity

 	_ASM_jn(e,TRealXBinOpNaN)		// branch if NaN

 	asm("test ebx, ebx");

 	_ASM_jn(e,TRealXBinOpNaN)

 	asm("jmp %a0": : "i"(&TRealXRealIndefinite));	// if both operands infinite, return 'real indefinite'

 	// divisor=NaN or infinity, dividend finite

 	asm("modfpsd:");

 	asm("cmp edx, 0x80000000");		// check for infinity

 	_ASM_jn(e,TRealXBinOpNaN)		// branch if NaN

 	asm("test ebx, ebx");

 	_ASM_jn(e,TRealXBinOpNaN)

 	// finite%infinity - return dividend unaltered

 	asm("modfpdd0:");

 	asm("mov ebx, [esi]");			// normal exit, return dividend unaltered

 	asm("mov edx, [esi+4]");

 	asm("mov ecx, [esi+8]");

 	asm("xor eax, eax");

 	asm("ret");

 	asm("modfp0:");

 	asm("shr ecx, 16");				// normal exit, result 0

 	asm("xor eax, eax");

 	asm("ret");

 	asm("modfpund:");

 	asm("shr ecx, 16");				// underflow, result 0

 	asm("mov eax, -10");			// return KErrUnderflow

 	asm("ret");

 	asm("modfplp:");

 	asm("shr ecx, 16");				// loss of precision, result 0

 	asm("mov eax, -7");				// return KErrTotalLossOfPrecision

 	asm("ret");

 	}

 __NAKED__ EXPORT_C TRealX::TRealX()

 /**

 Constructs a default extended precision object.

 This sets the value to zero.

 */

 	{

 	THISCALL_PROLOG0()

 	asm("xor eax, eax");

 	asm("mov [ecx], eax");				// set value to zero

 	asm("mov [ecx+4], eax");

 	asm("mov [ecx+8], eax");

 	asm("mov eax, ecx");				// must return this

 	THISCALL_EPILOG0()

 	}

 __NAKED__ EXPORT_C TRealX::TRealX(TUint /*aExp*/, TUint /*aMantHi*/, TUint /*aMantLo*/)

 /**

 Constructs an extended precision object from an explicit exponent and

 a 64 bit mantissa.

 @param aExp    The exponent

 @param aMantHi The high order 32 bits of the 64 bit mantissa

 @param aMantLo The low order 32 bits of the 64 bit mantissa

 */

 	{

 	THISCALL_PROLOG3()

 	asm("mov eax, [esp+4]");			// eax=aExp

 	asm("mov [ecx+8], eax");

 	asm("mov eax, [esp+8]");			// eax=aMantHi

 	asm("mov [ecx+4], eax");

 	asm("mov eax, [esp+12]");			// eax=aMantLo

 	asm("mov [ecx], eax");

 	asm("mov eax, ecx");				// must return this

 	THISCALL_EPILOG3()

 	}

 __NAKED__ EXPORT_C TInt TRealX::Set(TInt /*aInt*/)

 /**

 Gives this extended precision object a new value taken

 from a signed integer.

 @param aInt The signed integer value.

 @return KErrNone, always.

 */

 	{

 	THISCALL_PROLOG1()

 	// on entry ecx=this, [esp+4]=aInt, return code in eax

 	asm("mov edx, [esp+4]");	// edx=aInt

 	asm("or edx, edx");			// test sign/zero

 	asm("mov eax, 0x7FFF");

 	asm("jz short trealxfromint0_2");	// branch if 0

 	asm("jns short trealxfromint1_2");// skip if positive

 	asm("neg edx");					// take absolute value

 	asm("add eax, 0x10000");		// sign bit in eax bit 16

 	asm("trealxfromint1_2:");

 	asm("push ecx");				// save this

 	asm("bsr ecx, edx");			// bit number of edx MSB into ecx

 	asm("add eax, ecx");			// add to eax to form result exponent

 	asm("neg cl");

 	asm("add cl, 31");				// 31-bit number = number of shifts to normalise edx

 	asm("shl edx, cl");				// normalise edx

 	asm("pop ecx");					// this back into ecx

 	asm("ror eax, 16");				// sign/exponent into normal positions

 	asm("mov [ecx+4], edx");		// store mantissa high word

 	asm("mov [ecx+8], eax");		// store sign/exponent

 	asm("xor eax, eax");

 	asm("mov [ecx], eax");			// zero mantissa low word

 	THISCALL_EPILOG1()					// return KErrNone

 	asm("trealxfromint0_2:");

 	asm("mov [ecx], edx");

 	asm("mov [ecx+4], edx");		// store mantissa high word=0

 	asm("mov [ecx+8], edx");		// store sign/exponent=0

 	asm("xor eax, eax");			// return KErrNone

 	THISCALL_EPILOG1()

 	}

 __NAKED__ EXPORT_C TInt TRealX::Set(TUint /*aInt*/)

 /**

 Gives this extended precision object a new value taken from

 an unsigned integer.

 @param aInt The unsigned integer value.

 @return KErrNone, always.

 */

 	{

 	THISCALL_PROLOG1()

 	asm("mov edx, [esp+4]");		// edx=aInt

 	asm("mov eax, 0x7FFF");

 	asm("or edx, edx");				// test for 0

 	asm("jz short trealxfromuint0_");// branch if 0

 	asm("push ecx");				// save this

 	asm("bsr ecx, edx");			// bit number of edx MSB into ecx

 	asm("add eax, ecx");			// add to eax to form result exponent

 	asm("neg cl");

 	asm("add cl, 31");				// 31-bit number = number of shifts to normalise edx

 	asm("shl edx, cl");				// normalise edx

 	asm("pop ecx");					// this back into ecx

 	asm("shl eax, 16");				// exponent into normal position

 	asm("mov [ecx+4], edx");		// store mantissa high word

 	asm("mov [ecx+8], eax");		// store exponent

 	asm("xor eax, eax");

 	asm("mov [ecx], eax");			// zero mantissa low word

 	THISCALL_EPILOG1()				// return KErrNone

 	asm("trealxfromuint0_:");

 	asm("mov [ecx], edx");

 	asm("mov [ecx+4], edx");		// store mantissa high word=0

 	asm("mov [ecx+8], edx");		// store sign/exponent=0

 	asm("xor eax, eax");			// return KErrNone

 	THISCALL_EPILOG1()

 	}

 LOCAL_C __NAKED__ void TRealXFromTInt64(void)

 	{

 	// Convert TInt64 in edx:ebx to TRealX in ecx,edx:ebx

 	asm("mov eax, 0x7FFF");

 	asm("or edx, edx");					// test sign/zero

 	asm("jz short trealxfromtint64a");	// branch if top word zero

 	asm("jns short trealxfromtint64b");

 	asm("add eax, 0x10000");			// sign bit into eax bit 16

 	asm("neg edx");						// take absolute value

 	asm("neg ebx");

 	asm("sbb edx, 0");

 	asm("jz short trealxfromtint64d");	// branch if top word zero

 	asm("trealxfromtint64b:");

 	asm("bsr ecx, edx");				// ecx=bit number of edx MSB

 	asm("add eax, ecx");				// add to exponent in eax

 	asm("add eax, 32");

 	asm("neg cl");

 	asm("add cl, 31");					// 31-bit number = number of left shifts to normalise

 	asm("shld edx, ebx, cl");			// shift left to normalise edx:ebx

 	asm("shl ebx, cl");

 	asm("mov ecx, eax");				// sign/exponent into ecx

 	asm("ror ecx, 16");					// and into normal positions

 	asm("ret");

 	asm("trealxfromtint64a:");			// come here if top word zero

 	asm("or ebx, ebx");					// test for bottom word also zero

 	asm("jz short trealxfromtint64c");	// branch if it is

 	asm("trealxfromtint64d:");			// come here if top word zero, bottom word not

 	asm("mov edx, ebx");				// shift edx:ebx left 32

 	asm("xor ebx, ebx");

 	asm("bsr ecx, edx");				// ecx=bit number of edx MSB

 	asm("add eax, ecx");				// add to exponent in eax

 	asm("neg cl");

 	asm("add cl, 31");					// 31-bit number = number of left shifts to normalise

 	asm("shl edx, cl");					// normalise

 	asm("mov ecx, eax");				// sign/exponent into ecx

 	asm("ror ecx, 16");					// and into normal positions

 	asm("ret");

 	asm("trealxfromtint64c:");			// entire number is zero

 	asm("xor ecx, ecx");

 	asm("ret");

 	}

 __NAKED__ EXPORT_C TInt TRealX::Set(const TInt64& /*aInt*/)

 /**

 Gives this extended precision object a new value taken from

 a 64 bit integer.

 @param aInt The 64 bit integer value.

 @return KErrNone, always.

 */

 	{

 	// on entry ecx=this, [esp+4]=address of aInt, return code in eax

 	THISCALL_PROLOG1()

 	asm("push ebx");

 	asm("push ecx");

 	asm("mov edx, [esp+12]");			// edx=address of aInt

 	asm("mov ebx, [edx]");

 	asm("mov edx, [edx+4]");			// edx:ebx=aInt

 	asm("call %a0": : "i"(&TRealXFromTInt64)); // convert to TRealX in ecx,edx:ebx

 	asm("pop eax");						// eax=this

 	asm("mov [eax], ebx");				// store result

 	asm("mov [eax+4], edx");

 	asm("mov [eax+8], ecx");

 	asm("xor eax, eax");				// return KErrNone

 	asm("pop ebx");

 	THISCALL_EPILOG1()

 	}

 LOCAL_C __NAKED__ void __6TRealXi()

 	{

 	// common function for int to TRealX

 	THISCALL_PROLOG1()

 	asm("mov edx, [esp+4]");			// edx=aInt

 	asm("or edx, edx");					// test sign/zero

 	asm("mov eax, 0x7FFF");

 	asm("jz short trealxfromint0");		// branch if 0

 	asm("jns short trealxfromint1");	// skip if positive

 	asm("neg edx");						// take absolute value

 	asm("add eax, 0x10000");			// sign bit in eax bit 16

 	asm("trealxfromint1:");

 	asm("push ecx");					// save this

 	asm("bsr ecx, edx");				// bit number of edx MSB into ecx

 	asm("add eax, ecx");				// add to eax to form result exponent

 	asm("neg cl");

 	asm("add cl, 31");					// 31-bit number = number of shifts to normalise edx

 	asm("shl edx, cl");					// normalise edx

 	asm("pop ecx");						// this back into ecx

 	asm("ror eax, 16");					// sign/exponent into normal positions

 	asm("mov [ecx+4], edx");			// store mantissa high word

 	asm("mov [ecx+8], eax");			// store sign/exponent

 	asm("xor eax, eax");

 	asm("mov [ecx], eax");				// zero mantissa low word

 	asm("mov eax, ecx");				// return eax=this

 	THISCALL_EPILOG1()

 	asm("trealxfromint0:");

 	asm("mov [ecx], edx");

 	asm("mov [ecx+4], edx");			// store mantissa high word=0

 	asm("mov [ecx+8], edx");			// store sign/exponent=0

 	asm("mov eax, ecx");				// return eax=this

 	THISCALL_EPILOG1()

 	}

 __NAKED__ EXPORT_C TRealX::TRealX(TInt /*aInt*/)

 /**

 Constructs an extended precision object from a signed integer value.

 @param aInt The signed integer value.

 */

 	{

 	// on entry ecx=this, [esp+4]=aInt, return eax=this

 	asm("jmp %a0": : "i"(&__6TRealXi));

 	}

 __NAKED__ EXPORT_C TRealX& TRealX::operator=(TInt /*aInt*/)

 /**

 Assigns the specified signed integer value to this extended precision object.

 @param aInt The signed integer value.

 @return A reference to this extended precision object.

 */

 	{

 	// on entry ecx=this, [esp+4]=aInt, return eax=this

 	asm("jmp %a0": : "i"(&__6TRealXi));

 	}

 LOCAL_C __NAKED__ void __6TRealXui()

 	{

 	// common function for unsigned int to TRealX

 	THISCALL_PROLOG1()

 	asm("mov edx, [esp+4]");			// edx=aInt

 	asm("mov eax, 0x7FFF");

 	asm("or edx, edx");					// test for zero

 	asm("jz short trealxfromuint0");	// branch if 0

 	asm("push ecx");					// save this

 	asm("bsr ecx, edx");				// bit number of edx MSB into ecx

 	asm("add eax, ecx");				// add to eax to form result exponent

 	asm("neg cl");

 	asm("add cl, 31");					// 31-bit number = number of shifts to normalise edx

 	asm("shl edx, cl");					// normalise edx

 	asm("pop ecx");						// this back into ecx

 	asm("shl eax, 16");					// exponent into normal position

 	asm("mov [ecx+4], edx");			// store mantissa high word

 	asm("mov [ecx+8], eax");			// store exponent

 	asm("xor eax, eax");

 	asm("mov [ecx], eax");				// zero mantissa low word

 	asm("mov eax, ecx");				// return eax=this

 	THISCALL_EPILOG1()

 	asm("trealxfromuint0:");

 	asm("mov [ecx], edx");				

 	asm("mov [ecx+4], edx");			// store mantissa high word=0

 	asm("mov [ecx+8], edx");			// store sign/exponent=0

 	asm("mov eax, ecx");				// return eax=this

 	THISCALL_EPILOG1()

 	}

 __NAKED__ EXPORT_C TRealX::TRealX(TUint /*aInt*/)

 /**

 Constructs an extended precision object from an unsigned integer value.

 @param aInt The unsigned integer value.

 */

 	{

 	// on entry ecx=this, [esp+4]=aInt, return eax=this

 	asm("jmp %a0": : "i"(&__6TRealXui));

 	}

 __NAKED__ EXPORT_C TRealX& TRealX::operator=(TUint /*aInt*/)

 /**

 Assigns the specified unsigned integer value to this extended precision object.

 @param aInt The unsigned integer value.

 @return A reference to this extended precision object.

 */

 	{

 	// on entry ecx=this, [esp+4]=aInt, return eax=this

 	asm("jmp %a0": : "i"(&__6TRealXui));

 	}

 LOCAL_C __NAKED__ void __6TRealXRC6TInt64()

 	{

 	// common function for TInt64 to TRealX

 	THISCALL_PROLOG1()

 	asm("push ebx");					// preserve ebx

 	asm("push ecx");					// save this

 	asm("mov edx, [esp+12]");			// edx=address of aInt

 	asm("mov ebx, [edx]");

 	asm("mov edx, [edx+4]");			// edx:ebx=aInt

 	asm("call %a0": : "i"(&TRealXFromTInt64));	// convert to TRealX in ecx,edx:ebx

 	asm("pop eax");						// eax=this

 	asm("mov [eax], ebx");				// store result

 	asm("mov [eax+4], edx");

 	asm("mov [eax+8], ecx");

 	asm("mov ecx, eax");				// restore this ptr

 	asm("pop ebx");						// restore ebx

 	THISCALL_EPILOG1()

 	}

 __NAKED__ EXPORT_C TRealX::TRealX(const TInt64& /*aInt*/)

 /**

 Constructs an extended precision object from a 64 bit integer.

 @param aInt A reference to a 64 bit integer.

 */

 	{

 	// on entry ecx=this, [esp+4]=address of aInt, return eax=this

 	asm("jmp %a0": : "i"(&__6TRealXRC6TInt64));

 	}

 __NAKED__ EXPORT_C TRealX& TRealX::operator=(const TInt64& /*aInt*/)

 /**

 Assigns the specified 64 bit integer value to this extended precision object.

 @param aInt A reference to a 64 bit integer.

 @return A reference to this extended precision object.

 */

 	{

 	// on entry ecx=this, [esp+4]=address of aInt, return eax=this

 	asm("jmp %a0": : "i"(&__6TRealXRC6TInt64));

 	}

 LOCAL_C __NAKED__ void ConvertTReal32ToTRealX(void)

 	{

 	// Convert TReal32 in edx to TRealX in ecx:edx,ebx

 	asm("xor ebx, ebx");				// mant low always zero

 	asm("mov eax, edx");

 	asm("shr eax, 23");					// exponent now in al, sign in ah bit 0

 	asm("test al, al");					// check for denormal/zero

 	asm("jz short treal32totrealx2");	// branch if denormal/zero

 	asm("xor ecx, ecx");

 	asm("mov cl, al");

 	asm("add ecx, 0x7F80");				// bias exponent correctly for TRealX

 	asm("cmp al, 0xFF");				// check for infinity/NaN

 	asm("jnz short treal32totrealx1");	// skip if neither

 	asm("mov cl, al");					// else set TRealX exponent to FFFF

 	asm("mov ch, al");

 	asm("treal32totrealx1:");

 	asm("shl edx, 8");					// left-justify mantissa in edx

 	asm("or edx, 0x80000000");			// put in implied integer bit

 	asm("shl ecx, 16");					// exponent into ecx bits 16-31

 	asm("mov cl, ah");					// sign into ecx bit 0

 	asm("ret");

 	asm("treal32totrealx2:");			// come here if exponent 0

 	asm("shl edx, 9");					// left-justify mantissa in edx [shift out integer bit as well]

 	asm("jnz short treal32totrealx3");	// jump if denormal

 	asm("xor ecx, ecx");				// else return 0

 	asm("mov cl, ah");					// with same sign as input value

 	asm("ret");

 	asm("treal32totrealx3:");			// come here if denormal

 	asm("bsr ecx, edx");				// ecx=bit number of MSB of edx

 	asm("neg ecx");

 	asm("add ecx, 31");					// ecx=number of left shifts to normalise edx

 	asm("shl edx, cl");					// normalise

 	asm("neg ecx");

 	asm("add ecx, 0x7F80");				// exponent=7F80-number of shifts

 	asm("shl ecx, 16");					// exponent into ecx bits 16-31

 	asm("mov cl, ah");					// sign into ecx bit 0

 	asm("ret");

 	}

 LOCAL_C __NAKED__ void ConvertTReal64ToTRealX(void)

 	{

 	// Convert TReal64 in edx:ebx to TRealX in ecx:edx,ebx

 	asm("mov eax, edx");

 	asm("shr eax, 20");

 	asm("mov ecx, 0x7FF");

 	asm("and ecx, eax");				// ecx=exponent

 	asm("jz short treal64totrealx1");	// branch if zero/denormal

 	asm("add ecx, 0x7C00");				// else bias exponent correctly for TRealX

 	asm("cmp ecx, 0x83FF");				// check for infinity/NaN

 	asm("jnz short treal64totrealx2");

 	asm("mov ch, cl");					// if so, set exponent to FFFF

 	asm("treal64totrealx2:");		

 	asm("shl ecx, 16");					// exponent into ecx bits 16-31

 	asm("mov cl, 11");					// number of shifts needed to justify mantissa correctly

 	asm("shld edx, ebx, cl");			// shift mantissa left

 	asm("shl ebx, cl");

 	asm("or edx, 0x80000000");			// put in implied integer bit

 	asm("shr eax, 11");					// sign bit into al bit 0

 	asm("mov cl, al");					// into ecx bit 0

 	asm("ret");

 	asm("treal64totrealx1:");			// come here if zero/denormal

 	asm("mov cl, 12");					// number of shifts needed to justify mantissa correctly

 	asm("shld edx, ebx, cl");			// shift mantissa left

 	asm("shl ebx, cl");

 	asm("test edx, edx");				// check for zero

 	asm("jnz short treal64totrealx3");

 	asm("test ebx, ebx");

 	asm("jnz short treal64totrealx4");

 	asm("shr eax, 11");					// sign bit into eax bit 0, rest of eax=0

 	asm("mov ecx, eax");				// return 0 result with correct sign

 	asm("ret");

 	asm("treal64totrealx4:");			// come here if denormal, edx=0

 	asm("mov edx, ebx");				// shift mantissa left 32

 	asm("xor ebx, ebx");

 	asm("bsr ecx, edx");				// ecx=bit number of MSB of edx

 	asm("neg ecx");

 	asm("add ecx, 31");					// ecx=number of left shifts to normalise edx

 	asm("shl edx, cl");					// normalise

 	asm("neg ecx");

 	asm("add ecx, 0x7BE0");				// exponent=7BE0-number of shifts	

 	asm("shl ecx, 16");					// exponent into bits 16-31 of ecx

 	asm("shr eax, 11");

 	asm("mov cl, al");					// sign into bit 0 of ecx

 	asm("ret");

 	asm("treal64totrealx3:");			// come here if denormal, edx nonzero

 	asm("bsr ecx, edx");				// ecx=bit number of MSB of edx

 	asm("neg ecx");

 	asm("add ecx, 31");					// ecx=number of left shifts to normalise edx:ebx

 	asm("shld edx, ebx, cl");			// normalise

 	asm("shl ebx, cl");

 	asm("neg ecx");

 	asm("add ecx, 0x7C00");				// exponent=7C00-number of shifts

 	asm("shl ecx, 16");					// exponent into bits 16-31 of ecx

 	asm("shr eax, 11");

 	asm("mov cl, al");					// sign into bit 0 of ecx

 	asm("ret");

 	}

 __NAKED__ EXPORT_C TInt TRealX::Set(TReal32 /*aReal*/)

 /**

 Gives this extended precision object a new value taken from

 a single precision floating point number.

 @param aReal The single precision floating point value.

 @return KErrNone, if a valid number;

 KErrOverflow, if the number is infinite;

 KErrArgument, if not a number.

 */

 	{

 	// on entry, ecx=this and aReal is in [esp+4]

 	// on exit, error code in eax

 	THISCALL_PROLOG1()

 	asm("push ecx");

 	asm("push ebx");					// save ebx

 	asm("push ecx");					// save this

 	asm("mov edx, [esp+16]");			// aReal into edx

 	asm("call %a0": : "i"(&ConvertTReal32ToTRealX));

 	asm("pop eax");						// eax=this

 	asm("mov [eax], ebx");				// store result

 	asm("mov [eax+4], edx");

 	asm("mov [eax+8], ecx");

 	asm("xor eax, eax");				// error code=KErrNone initially

 	asm("cmp ecx, 0xFFFF0000");			// check for infinity/NaN

 	asm("jb short trealxsettreal32a");	// if neither, return KErrNone

 	asm("mov eax, -9");					// eax=KErrOverflow

 	asm("cmp edx, 0x80000000");			// check for infinity

 	asm("je short trealxsettreal32a");	// if infinity, return KErrOverflow

 	asm("mov eax, -6");					// if NaN, return KErrArgument

 	asm("trealxsettreal32a:");

 	asm("pop ebx");

 	asm("pop ecx");

 	THISCALL_EPILOG1()

 	}

 __NAKED__ EXPORT_C TInt TRealX::Set(TReal64 /*aReal*/)

 /**

 Gives this extended precision object a new value taken from

 a double precision floating point number.

 @param aReal The double precision floating point value.

 @return KErrNone, if a valid number;

 KErrOverflow, if the number is infinite;

 KErrArgument, if not a number.

 */

 	{

 	// on entry, ecx=this and aReal is in [esp+4] (mant low) and [esp+8] (sign/exp/mant high)

 	// on exit, error code in eax

 	THISCALL_PROLOG2()

 	asm("push ecx");

 	asm("push ebx");				// save ebx

 	asm("push ecx");				// save this

 	asm("mov ebx, [esp+16]");		// aReal into edx:ebx

 	asm("mov edx, [esp+20]");

 	asm("call %a0": : "i"(&ConvertTReal64ToTRealX));

 	asm("pop eax");					// eax=this

 	asm("mov [eax], ebx");			// store result

 	asm("mov [eax+4], edx");

 	asm("mov [eax+8], ecx");

 	asm("xor eax, eax");			// error code=KErrNone initially

 	asm("cmp ecx, 0xFFFF0000");		// check for infinity/NaN

 	asm("jb short trealxsettreal64a");	// if neither, return KErrNone

 	asm("mov eax, -9");				// eax=KErrOverflow

 	asm("cmp edx, 0x80000000");		// check for infinity

 	asm("jne short trealxsettreal64b");	// branch if NaN

 	asm("test ebx, ebx");

 	asm("je short trealxsettreal64a");	// if infinity, return KErrOverflow

 	asm("trealxsettreal64b:");

 	asm("mov eax, -6");				// if NaN, return KErrArgument

 	asm("trealxsettreal64a:");

 	asm("pop ebx");

 	asm("pop ecx");

 	THISCALL_EPILOG2()

 	}

 LOCAL_C __NAKED__ void __6TRealXf()

 	{

 	// common function for float to TRealX

 	THISCALL_PROLOG1()

 	asm("push ebx");					// save ebx

 	asm("push ecx");					// save this

 	asm("mov edx, [esp+12]");			// aReal into edx

 	asm("call %a0": : "i"(&ConvertTReal32ToTRealX));

 	asm("pop eax");						// eax=this

 	asm("mov [eax], ebx");				// store result

 	asm("mov [eax+4], edx");

 	asm("mov [eax+8], ecx");

 	asm("pop ebx");

 	asm("mov ecx,eax");

 	THISCALL_EPILOG1()

 	}

 __NAKED__ EXPORT_C TRealX::TRealX(TReal32 /*aReal*/)

 /**

 Constructs an extended precision object from

 a single precision floating point number.

 @param aReal The single precision floating point value.

 */

 	{

 	// on entry, ecx=this and aReal is in [esp+4]

 	// on exit, eax=this

 	asm("jmp %a0": : "i"(&__6TRealXf));

 	}

 __NAKED__ EXPORT_C TRealX& TRealX::operator=(TReal32 /*aReal*/)

 /**

 Assigns the specified single precision floating point number to

 this extended precision object.

 @param aReal The single precision floating point value.

 @return A reference to this extended precision object.

 */

 	{

 	// on entry, ecx=this and aReal is in [esp+4]

 	// on exit, eax=this

 	asm("jmp %a0": : "i"(&__6TRealXf));

 	}

 LOCAL_C __NAKED__ void __6TRealXd()

 	{

 	// common function for double to TRealX

 	THISCALL_PROLOG2()

 	asm("push ebx");				// save ebx

 	asm("push ecx");				// save this

 	asm("mov ebx, [esp+12]");		// aReal into edx:ebx

 	asm("mov edx, [esp+16]");

 	asm("call %a0": : "i"(&ConvertTReal64ToTRealX));

 	asm("pop eax");					// eax=this

 	asm("mov [eax], ebx");			// store result

 	asm("mov [eax+4], edx");

 	asm("mov [eax+8], ecx");

 	asm("pop ebx");

 	asm("mov ecx,eax");

 	THISCALL_EPILOG2()

 	}

 __NAKED__ EXPORT_C TRealX::TRealX(TReal64 /*aReal*/)

 /**

 Constructs an extended precision object from

 a double precision floating point number.

 @param aReal The double precision floating point value.

 */

 	{

 	// on entry, ecx=this and aReal is in [esp+4] (mant low) and [esp+8] (sign/exp/mant high)

 	// on exit, eax=this

 	asm("jmp %a0": : "i"(&__6TRealXd));

 	}

 __NAKED__ EXPORT_C TRealX& TRealX::operator=(TReal64 /*aReal*/)

 /**

 Assigns the specified double precision floating point number to

 this extended precision object.

 @param aReal The double precision floating point value.

 @return A reference to this extended precision object.

 */

 	{

 	// on entry, ecx=this and aReal is in [esp+4] (mant low) and [esp+8] (sign/exp/mant high)

 	// on exit, eax=this

 	asm("jmp %a0": : "i"(&__6TRealXd));

 	}

 __NAKED__ EXPORT_C TRealX::operator TInt() const

 /**

 Gets the extended precision value as a signed integer value.

 The operator asm("returns:");

 1. zero , if the extended precision value is not a number

 2. 0x7FFFFFFF, if the value is positive and too big to fit into a TInt.

 3. 0x80000000, if the value is negative and too big to fit into a TInt.

 */

 	{

 	// on entry ecx=this, return value in eax

 	THISCALL_PROLOG0()

 	asm("push ecx");

 	asm("mov edx, [ecx]");			// edx=mantissa low

 	asm("mov eax, [ecx+4]");		// eax=mantissa high

 	asm("mov ecx, [ecx+8]");		// ecx=exponent/sign

 	asm("ror ecx, 16");				// exponent into cx

 	asm("cmp cx, 0xFFFF");

 	asm("jz short trealxtoint1");	// branch if exp=FFFF

 	asm("mov dx, cx");

 	asm("mov cx, 0x801E");

 	asm("sub cx, dx");				// cx=number of right shifts needed to convert mantissa to int

 	asm("jbe short trealxtoint2");	// if exp>=801E, saturate result

 	asm("cmp cx, 31");				// more than 31 shifts needed?

 	asm("ja short trealxtoint0");	// if so, underflow to zero

 	asm("shr eax, cl");				// else ABS[result]=eax>>cl

 	asm("test ecx, 0x10000");		// test sign

 	asm("jz short trealxtoint3");	// skip if +

 	asm("neg eax");

 	asm("trealxtoint3:");

 	asm("pop ecx");

 	THISCALL_EPILOG0()

 	asm("trealxtoint1:");			// come here if exponent=FFFF

 	asm("cmp eax, 0x80000000");		// check for infinity

 	asm("jnz short trealxtoint0");	// if NaN, return 0

 	asm("test edx, edx");

 	asm("jnz short trealxtoint0");	// if NaN, return 0

 	asm("trealxtoint2:");			// come here if argument too big for 32-bit integer

 	asm("mov eax, 0x7FFFFFFF");

 	asm("shr ecx, 17");				// sign bit into carry flag

 	asm("adc eax, 0");				// eax=7FFFFFFF if +, 80000000 if -

 	asm("pop ecx");					

 	THISCALL_EPILOG0()				// return saturated value

 	asm("trealxtoint0:");			// come here if INT{argument}=0 or NaN

 	asm("xor eax, eax");			// return 0

 	asm("pop ecx");

 	THISCALL_EPILOG0()

 	}

 __NAKED__ EXPORT_C TRealX::operator TUint() const

 /**

 Returns the extended precision value as an unsigned signed integer value.

 The operator asm("returns:");

 1. zero, if the extended precision value is not a number

 2. 0xFFFFFFFF, if the value is positive and too big to fit into a TUint.

 3. zero, if the value is negative and too big to fit into a TUint.

 */

 	{

 	// on entry ecx=this, return value in eax

 	THISCALL_PROLOG0()

 	asm("push ecx");

 	asm("mov edx, [ecx]");				// edx=mantissa low

 	asm("mov eax, [ecx+4]");			// eax=mantissa high

 	asm("mov ecx, [ecx+8]");			// ecx=exponent/sign

 	asm("ror ecx, 16");					// exponent into cx

 	asm("cmp cx, 0xFFFF");

 	asm("jz short trealxtouint1");		// branch if exp=FFFF

 	asm("mov dx, cx");

 	asm("mov cx, 0x801E");

 	asm("sub cx, dx");					// cx=number of right shifts needed to convert mantissa to int

 	asm("jb short trealxtouint2");		// if exp>801E, saturate result

 	asm("cmp cx, 31");					// more than 31 shifts needed?

 	asm("ja short trealxtouint0");		// if so, underflow to zero

 	asm("test ecx, 0x10000");			// test sign

 	asm("jnz short trealxtouint0");		// if -, return 0

 	asm("shr eax, cl");					// else result=eax>>cl

 	asm("pop ecx");

 	THISCALL_EPILOG0()

 	asm("trealxtouint1:");				// come here if exponent=FFFF

 	asm("cmp eax, 0x80000000");			// check for infinity

 	asm("jnz short trealxtouint0");		// if NaN, return 0

 	asm("test edx, edx");

 	asm("jnz short trealxtouint0");		// if NaN, return 0

 	asm("trealxtouint2:");				// come here if argument too big for 32-bit integer

 	asm("mov eax, 0xFFFFFFFF");

 	asm("shr ecx, 17");					// sign bit into carry flag

 	asm("adc eax, 0");					// eax=FFFFFFFF if +, 0 if -

 	asm("pop ecx");			

 	THISCALL_EPILOG0()					// return saturated value

 	asm("trealxtouint0:");				// come here if INT{argument}=0 or NaN

 	asm("xor eax, eax");				// return 0

 	asm("pop ecx");

 	THISCALL_EPILOG0()

 	}

 LOCAL_C __NAKED__ void ConvertTRealXToTInt64(void)

 	{

 	// Convert TRealX in ecx,edx:ebx to TInt64 in edx:ebx

 	asm("ror ecx, 16");					// exponent into cx

 	asm("cmp cx, 0xFFFF");

 	asm("jz short trealxtoint64a");		// branch if exp=FFFF

 	asm("mov ax, cx");

 	asm("mov cx, 0x803E");

 	asm("sub cx, ax");					// cx=number of right shifts needed to convert mantissa to int

 	asm("jbe short trealxtoint64b");	// if exp>=803E, saturate result

 	asm("cmp cx, 63");					// more than 63 shifts needed?

 	asm("ja short trealxtoint64z");		// if so, underflow to zero

 	asm("cmp cl, 31");					// more than 31 shifts needed?

 	asm("jbe short trealxtoint64d");	// branch if not

 	asm("sub cl, 32");					// cl=shift count - 32

 	asm("mov ebx, edx");				// shift right by 32

 	asm("xor edx, edx");

 	asm("trealxtoint64d:");

 	asm("shrd ebx, edx, cl");			// shift edx:ebx right by cl to give ABS{result}

 	asm("shr edx, cl");

 	asm("test ecx, 0x10000");			// test sign

 	asm("jz short trealxtoint64c");		// skip if +

 	asm("neg edx");						// if -, negate

 	asm("neg ebx");

 	asm("sbb edx, 0");

 	asm("trealxtoint64c:");

 	asm("ret");

 	asm("trealxtoint64a:");				// come here if exponent=FFFF

 	asm("cmp edx, 0x80000000");			// check for infinity

 	asm("jnz short trealxtoint64z");	// if NaN, return 0

 	asm("test ebx, ebx");			

 	asm("jnz short trealxtoint64z");	// if NaN, return 0

 	asm("trealxtoint64b:");				// come here if argument too big for 32-bit integer

 	asm("mov edx, 0x7FFFFFFF");

 	asm("mov ebx, 0xFFFFFFFF");

 	asm("shr ecx, 17");					// sign bit into carry flag

 	asm("adc ebx, 0");					// edx:ebx=7FFFFFFF FFFFFFFF if +,

 	asm("adc edx, 0");					// or 80000000 00000000 if -

 	asm("ret");							// return saturated value

 	asm("trealxtoint64z:");				// come here if INT{argument}=0 or NaN

 	asm("xor edx, edx");				// return 0

 	asm("xor ebx, ebx");

 	asm("ret");

 	}

 /**

 Returns the extended precision value as a 64 bit integer value.

 The operator asm("returns:");

 1. zero, if the extended precision value is not a number

 2. 0x7FFFFFFF FFFFFFFF, if the value is positive and too big to fit

 into a TInt64

 3. 0x80000000 00000000, if the value is negative and too big to fit

 into a TInt.

 */

 __NAKED__ EXPORT_C TRealX::operator TInt64() const

 	{

 	// on entry, ecx=this, return value in edx:eax

 	THISCALL_PROLOG0()

 	asm("push ecx");

 	asm("push ebx");

 	asm("mov ebx, [ecx]");				// get TRealX value into ecx,edx:ebx

 	asm("mov edx, [ecx+4]");

 	asm("mov ecx, [ecx+8]");

 	asm("call %a0": : "i"(&ConvertTRealXToTInt64));

 	asm("mov eax, ebx");				// result low into eax

 	asm("pop ebx");

 	asm("pop ecx");

 	THISCALL_EPILOG0()

 	}

 LOCAL_C __NAKED__ void TRealXGetTReal32(void)

 	{

 	// Convert TRealX in ecx,edx:ebx to TReal32 in edx

 	// Return error code in eax

 	asm("cmp ecx, 0xFFFF0000");				// check for infinity/NaN

 	asm("jnc short trealxgettreal32a");

 	asm("xor eax, eax");

 	asm("ror ecx, 16");						// exponent into cx

 	asm("sub cx, 0x7F80");					// cx=result exponent if normalised

 	asm("jbe short trealxgettreal32b");		// jump if denormal, zero or underflow

 	asm("cmp cx, 0xFF");					// check if overflow

 	asm("jb short trealxgettreal32c");		// jump if not

 	asm("trealxgettreal32d:");				// come here if overflow

 	asm("xor edx, edx");					// set mantissa=0 to generate infinity

 	asm("ror ecx, 16");						// ecx back to normal format

 	asm("trealxgettreal32a:");				// come here if infinity or NaN

 	asm("shr edx, 7");

 	asm("or edx, 0xFF000000");				// set exponent to FF

 	asm("shr ecx, 1");						// sign bit -> carry

 	asm("rcr edx, 1");						// sign bit -> MSB of result

 	asm("mov eax, edx");

 	asm("shl eax, 9");						// test for infinity or NaN

 	asm("mov eax, -9");						// eax=KErrOverflow

 	asm("jz short trealxgettreal32e");

 	asm("mov eax, -6");						// if NaN, eax=KErrArgument

 	asm("trealxgettreal32e:");

 	asm("ret");

 	asm("trealxgettreal32b:");				// come here if exponent<=7F80

 	asm("cmp cx, -24");						// check for zero or total underflow

 	asm("jle short trealxgettreal32z");

 	asm("neg cl");

 	asm("inc cl");							// cl=number of right shifts to form denormal mantissa

 	asm("shrd eax, ebx, cl");				// shift mantissa right into eax

 	asm("shrd ebx, edx, cl");

 	asm("shr edx, cl");

 	asm("or edx, 0x80000000");				// set top bit to ensure correct rounding up

 	asm("xor cl, cl");						// cl=result exponent=0

 	asm("trealxgettreal32c:");				// come here if result normalised

 	asm("cmp dl, 0x80");					// check rounding bits

 	asm("ja short trealxgettreal32f");		// branch to round up

 	asm("jb short trealxgettreal32g");		// branch to round down

 	asm("test ebx, ebx");

 	asm("jnz short trealxgettreal32f");		// branch to round up

 	asm("test eax, eax");

 	asm("jnz short trealxgettreal32f");		// branch to round up

 	asm("test ecx, 0x01000000");			// check rounded-down flag

 	asm("jnz short trealxgettreal32f");		// branch to round up

 	asm("test ecx, 0x02000000");			// check rounded-up flag

 	asm("jnz short trealxgettreal32g");		// branch to round down

 	asm("test dh, 1");						// else round to even

 	asm("jz short trealxgettreal32g");		// branch to round down if LSB=0

 	asm("trealxgettreal32f:");				// come here to round up

 	asm("add edx, 0x100");					// increment mantissa

 	asm("jnc short trealxgettreal32g");

 	asm("rcr edx, 1");

 	asm("inc cl");							// if carry, increment exponent

 	asm("cmp cl, 0xFF");					// and check for overflow

 	asm("jz short trealxgettreal32d");		// branch out if overflow

 	asm("trealxgettreal32g:");				// come here to round down

 	asm("xor dl, dl");

 	asm("add edx, edx");					// shift out integer bit

 	asm("mov dl, cl");

 	asm("ror edx, 8");						// exponent->edx bits 24-31, mantissa in 23-1

 	asm("test edx, edx");					// check if underflow

 	asm("jz short trealxgettreal32h");		// branch out if underflow

 	asm("shr ecx, 17");						// sign bit->carry

 	asm("rcr edx, 1");						// ->edx bit 31, exp->edx bits 23-30, mant->edx bits 22-0

 	asm("xor eax, eax");					// return KErrNone

 	asm("ret");

 	asm("trealxgettreal32z:");				// come here if zero or underflow

 	asm("xor eax, eax");

 	asm("cmp cx, 0x8080");					// check for zero

 	asm("jz short trealxgettreal32y");		// if zero, return KErrNone

 	asm("trealxgettreal32h:");				// come here if underflow after rounding

 	asm("mov eax, -10");					// eax=KErrUnderflow

 	asm("trealxgettreal32y:");

 	asm("xor edx, edx");

 	asm("shr ecx, 17");

 	asm("rcr edx, 1");						// sign bit into edx bit 31, rest of edx=0

 	asm("ret");

 	}

 LOCAL_C __NAKED__ void TRealXGetTReal64(void)

 	{

 	// Convert TRealX in ecx,edx:ebx to TReal64 in edx:ebx

 	// Return error code in eax

 	// edi, esi also modified

 	asm("ror ecx, 16");						// exponent into cx

 	asm("cmp cx, 0xFFFF");					// check for infinity/NaN

 	asm("jnc short trealxgettreal64a");

 	asm("xor eax, eax");

 	asm("xor edi, edi");

 	asm("sub cx, 0x7C00");					// cx=result exponent if normalised

 	asm("jbe short trealxgettreal64b");		// jump if denormal, zero or underflow

 	asm("cmp cx, 0x07FF");					// check if overflow

 	asm("jb short trealxgettreal64c");		// jump if not

 	asm("trealxgettreal64d:");				// come here if overflow

 	asm("xor edx, edx");					// set mantissa=0 to generate infinity

 	asm("xor ebx, ebx");

 	asm("trealxgettreal64a:");				// come here if infinity or NaN

 	asm("mov cl, 10");

 	asm("shrd ebx, edx, cl");

 	asm("shr edx, cl");

 	asm("or edx, 0xFFE00000");				// set exponent to 7FF

 	asm("shr ecx, 17");						// sign bit -> carry

 	asm("rcr edx, 1");						// sign bit -> MSB of result

 	asm("rcr ebx, 1");

 	asm("mov eax, edx");

 	asm("shl eax, 12");						// test for infinity or NaN

 	asm("mov eax, -9");						// eax=KErrOverflow

 	asm("jnz short trealxgettreal64n");

 	asm("test ebx, ebx");

 	asm("jz short trealxgettreal64e");

 	asm("trealxgettreal64n:");

 	asm("mov eax, -6");						// if NaN, eax=KErrArgument

 	asm("trealxgettreal64e:");

 	asm("ret");

 	asm("trealxgettreal64b:");				// come here if exponent<=7C00

 	asm("cmp cx, -53");						// check for zero or total underflow

 	asm("jle short trealxgettreal64z");

 	asm("neg cl");

 	asm("inc cl");							// cl=number of right shifts to form denormal mantissa

 	asm("cmp cl, 32");

 	asm("jb trealxgettreal64x");

 	asm("mov eax, ebx");					// if >=32 shifts, do 32 shifts and decrement count by 32

 	asm("mov ebx, edx");

 	asm("xor edx, edx");

 	asm("trealxgettreal64x:");

 	asm("shrd edi, eax, cl");

 	asm("shrd eax, ebx, cl");				// shift mantissa right into eax

 	asm("shrd ebx, edx, cl");

 	asm("shr edx, cl");

 	asm("or edx, 0x80000000");				// set top bit to ensure correct rounding up

 	asm("xor cx, cx");						// cx=result exponent=0

 	asm("trealxgettreal64c:");				// come here if result normalised

 	asm("mov esi, ebx");

 	asm("and esi, 0x7FF");					// esi=rounding bits

 	asm("cmp esi, 0x400");					// check rounding bits

 	asm("ja short trealxgettreal64f");		// branch to round up

 	asm("jb short trealxgettreal64g");		// branch to round down

 	asm("test eax, eax");

 	asm("jnz short trealxgettreal64f");		// branch to round up

 	asm("test edi, edi");

 	asm("jnz short trealxgettreal64f");		// branch to round up

 	asm("test ecx, 0x01000000");			// check rounded-down flag

 	asm("jnz short trealxgettreal64f");		// branch to round up

 	asm("test ecx, 0x02000000");			// check rounded-up flag

 	asm("jnz short trealxgettreal64g");		// branch to round down

 	asm("test ebx, 0x800");					// else round to even

 	asm("jz short trealxgettreal64g");		// branch to round down if LSB=0

 	asm("trealxgettreal64f:");				// come here to round up

 	asm("add ebx, 0x800");					// increment mantissa

 	asm("adc edx, 0");

 	asm("jnc short trealxgettreal64g");

 	asm("rcr edx, 1");

 	asm("inc cx");							// if carry, increment exponent

 	asm("cmp cx, 0x7FF");					// and check for overflow

 	asm("jz short trealxgettreal64d");		// branch out if overflow

 	asm("trealxgettreal64g:");				// come here to round down

 	asm("xor bl, bl");						// clear rounding bits

 	asm("and bh, 0xF8");

 	asm("mov di, cx");						// save exponent

 	asm("mov cl, 10");

 	asm("and edx, 0x7FFFFFFF");				// clear integer bit

 	asm("shrd ebx, edx, cl");				// shift mantissa right by 10

 	asm("shr edx, cl");

 	asm("shl edi, 21");						// exponent into edi bits 21-31

 	asm("or edx, edi");						// into edx bits 21-31

 	asm("test edx, edx");					// check if underflow

 	asm("jnz short trealxgettreal64i");

 	asm("test ebx, ebx");

 	asm("jz short trealxgettreal64h");		// branch out if underflow

 	asm("trealxgettreal64i:");

 	asm("shr ecx, 17");						// sign bit->carry

 	asm("rcr edx, 1");						// ->edx bit 31, exp->edx bits 20-30, mant->edx bits 20-0

 	asm("rcr ebx, 1");

 	asm("xor eax, eax");					// return KErrNone

 	asm("ret");

 	asm("trealxgettreal64z:");				// come here if zero or underflow

 	asm("xor eax, eax");

 	asm("cmp cx, 0x8400");					// check for zero

 	asm("jz short trealxgettreal64y");		// if zero, return KErrNone

 	asm("trealxgettreal64h:");				// come here if underflow after rounding

 	asm("mov eax, -10");					// eax=KErrUnderflow

 	asm("trealxgettreal64y:");

 	asm("xor edx, edx");

 	asm("xor ebx, ebx");

 	asm("shr ecx, 17");

 	asm("rcr edx, 1");						// sign bit into edx bit 31, rest of edx=0, ebx=0

 	asm("ret");

 	}

 __NAKED__ EXPORT_C TRealX::operator TReal32() const

 /**

 Returns the extended precision value as

 a single precision floating point value.

 */

 	{

 	// On entry, ecx=this

 	// On exit, TReal32 value on top of FPU stack

 	THISCALL_PROLOG0()

 	asm("push ecx");

 	asm("push ebx");

 	asm("mov ebx, [ecx]");					// *this into ecx,edx:ebx

 	asm("mov edx, [ecx+4]");

 	asm("mov ecx, [ecx+8]");

 	asm("call %a0": : "i"(&TRealXGetTReal32));	// Convert to TReal32 in edx

 	asm("push edx");						// push TReal32 onto stack

 	asm("fld dword ptr [esp]");				// push TReal32 onto FPU stack

 	asm("pop edx");

 	asm("pop ebx");

 	asm("pop ecx");

 	THISCALL_EPILOG0()

 	}

 __NAKED__ EXPORT_C TRealX::operator TReal64() const

 /**

 Returns the extended precision value as

 a double precision floating point value.

 */

 	{

 	// On entry, ecx=this

 	// On exit, TReal64 value on top of FPU stack

 	THISCALL_PROLOG0()

 	asm("push ecx");

 	asm("push ebx");

 	asm("push esi");

 	asm("push edi");

 	asm("mov ebx, [ecx]");						// *this into ecx,edx:ebx

 	asm("mov edx, [ecx+4]");

 	asm("mov ecx, [ecx+8]");

 	asm("call %a0": : "i"(&TRealXGetTReal64));	// Convert to TReal32 in edx:ebx

 	asm("push edx");							// push TReal64 onto stack

 	asm("push ebx");

 	asm("fld qword ptr [esp]");					// push TReal64 onto FPU stack

 	asm("add esp, 8");

 	asm("pop edi");

 	asm("pop esi");

 	asm("pop ebx");

 	asm("pop ecx");

 	THISCALL_EPILOG0()

 	}

 __NAKED__ EXPORT_C TInt TRealX::GetTReal(TReal32& /*aVal*/) const

 /**

 Extracts the extended precision value as

 a single precision floating point value.

 @param aVal A reference to a single precision object which contains

 the result of the operation.

 @return KErrNone, if the operation is successful;

 KErrOverflow, if the operation results in overflow;

 KErrUnderflow, if the operation results in underflow.

 */

 	{

 	// On entry, ecx=this, [esp+4]=address of aVal

 	// On exit, eax=return code

 	THISCALL_PROLOG1()

 	asm("push ecx");

 	asm("push ebx");

 	asm("mov ebx, [ecx]");						// *this into ecx,edx:ebx

 	asm("mov edx, [ecx+4]");

 	asm("mov ecx, [ecx+8]");

 	asm("call %a0": : "i"(&TRealXGetTReal32));

 	asm("mov ecx, [esp+12]");					// ecx=address of aVal

 	asm("mov [ecx], edx");						// store result

 	asm("pop ebx");

 	asm("pop ecx");

 	THISCALL_EPILOG1()							// return with error code in eax

 	}

 __NAKED__ EXPORT_C TInt TRealX::GetTReal(TReal64& /*aVal*/) const

 /**

 Extracts the extended precision value as

 a double precision floating point value.

 @param aVal A reference to a double precision object which

 contains the result of the operation.

 @return KErrNone, if the operation is successful;

 KErrOverflow, if the operation results in overflow;

 KErrUnderflow, if the operation results in underflow.

 */

 	{

 	// On entry, ecx=this, [esp+4]=address of aVal

 	// On exit, eax=return code

 	THISCALL_PROLOG1()

 	asm("push ecx");

 	asm("push ebx");

 	asm("push esi");

 	asm("push edi");

 	asm("mov ebx, [ecx]");						// *this into ecx,edx:ebx

 	asm("mov edx, [ecx+4]");

 	asm("mov ecx, [ecx+8]");

 	asm("call %a0": : "i"(&TRealXGetTReal64));

 	asm("mov ecx, [esp+20]");					// ecx=address of aVal

 	asm("mov [ecx], ebx");						// store result

 	asm("mov [ecx+4], edx");

 	asm("pop edi");

 	asm("pop esi");

 	asm("pop ebx");

 	asm("pop ecx");

 	THISCALL_EPILOG1()							// return with error code in eax

 	}

 __NAKED__ EXPORT_C void TRealX::SetZero(TBool /*aNegative*/)

 /**

 Sets the value of this extended precision object to zero.

 @param aNegative ETrue, the value is a negative zero;

 EFalse, the value is a positive zero, this is the default.

 */

 	{

 	THISCALL_PROLOG1()

 	asm("mov edx, [esp+4]");		// aNegative into edx

 	asm("xor eax, eax");			// eax=0

 	asm("mov [ecx], eax");

 	asm("mov [ecx+4], eax");

 	asm("test edx, edx");

 	asm("jz short setzero1");

 	asm("inc eax");					// eax=1 if aNegative!=0

 	asm("setzero1:");

 	asm("mov [ecx+8], eax");		// generate positive or negative zero

 	THISCALL_EPILOG1()

 	}

 __NAKED__ EXPORT_C void TRealX::SetNaN()

 /**

 Sets the value of this extended precision object to 'not a number'.

 */

 	{

 	THISCALL_PROLOG0()

 	asm("xor eax, eax");			// set *this to 'real indefinite'

 	asm("mov [ecx], eax");

 	asm("mov eax, 0xC0000000");

 	asm("mov [ecx+4], eax");

 	asm("mov eax, 0xFFFF0001");

 	asm("mov [ecx+8], eax");

 	THISCALL_EPILOG0()

 	}

 __NAKED__ EXPORT_C void TRealX::SetInfinite(TBool /*aNegative*/)

 /**

 Sets the value of this extended precision object to infinity.

 @param aNegative ETrue, the value is a negative zero;

 EFalse, the value is a positive zero.

 */

 	{

 	THISCALL_PROLOG1()

 	asm("mov edx, [esp+4]");			// aNegative into edx

 	asm("mov eax, 0xFFFF0000");			// exponent=FFFF, sign=0 initially

 	asm("test edx, edx");

 	asm("jz short setinf1");

 	asm("inc eax");						// sign=1 if aNegative!=0

 	asm("setinf1:");

 	asm("mov [ecx+8], eax");

 	asm("mov eax, 0x80000000");			// generate positive or negative infinity

 	asm("mov [ecx+4], eax");

 	asm("xor eax, eax");

 	asm("mov [ecx], eax");

 	THISCALL_EPILOG1()

 	}

 __NAKED__ EXPORT_C TBool TRealX::IsZero() const

 /**

 Determines whether the extended precision value is zero.

 @return True, if the extended precision value is zero, false, otherwise.

 */

 	{

 	THISCALL_PROLOG0()

 	asm("mov eax, [ecx+8]");		// check exponent

 	asm("shr eax, 16");				// move exponent into ax

 	asm("jz short iszero1");		// branch if zero

 	asm("xor eax, eax");			// else return 0

 	THISCALL_EPILOG0()

 	asm("iszero1:");

 	asm("inc eax");					// if zero, return 1

 	THISCALL_EPILOG0()

 	}

 __NAKED__ EXPORT_C TBool TRealX::IsNaN() const

 /**

 Determines whether the extended precision value is 'not a number'.

 @return True, if the extended precision value is 'not a number',

 false, otherwise.

 */

 	{

 	THISCALL_PROLOG0()

 	asm("mov eax, [ecx+8]");		// check exponent

 	asm("cmp eax, 0xFFFF0000");

 	asm("jc short isnan0");			// branch if not FFFF

 	asm("mov eax, [ecx+4]");

 	asm("cmp eax, 0x80000000");		// check for infinity

 	asm("jne short isnan1");

 	asm("mov eax, [ecx]");

 	asm("test eax, eax");

 	asm("jne short isnan1");

 	asm("isnan0:");

 	asm("xor eax, eax");			// return 0 if not NaN

 	THISCALL_EPILOG0()

 	asm("isnan1:");

 	asm("mov eax, 1");				// return 1 if NaN

 	THISCALL_EPILOG0()

 	}

 __NAKED__ EXPORT_C TBool TRealX::IsInfinite() const

 /**

 Determines whether the extended precision value has a finite value.

 @return True, if the extended precision value is finite,

 false, if the value is 'not a number' or is infinite,

 */

 	{

 	THISCALL_PROLOG0()

 	asm("mov eax, [ecx+8]");			// check exponent

 	asm("cmp eax, 0xFFFF0000");

 	asm("jc short isinf0");				// branch if not FFFF

 	asm("mov eax, [ecx+4]");

 	asm("cmp eax, 0x80000000");			// check for infinity

 	asm("jne short isinf0");

 	asm("mov eax, [ecx]");

 	asm("test eax, eax");

 	asm("jne short isinf0");

 	asm("inc eax");						// return 1 if infinity

 	THISCALL_EPILOG0()

 	asm("isinf0:");

 	asm("xor eax, eax");				// return 0 if not infinity

 	THISCALL_EPILOG0()

 	}

 __NAKED__ EXPORT_C TBool TRealX::IsFinite() const

 /**

 Determines whether the extended precision value has a finite value.

 @return True, if the extended precision value is finite,

 false, if the value is 'not a number' or is infinite,

 */

 	{

 	THISCALL_PROLOG0()

 	asm("mov eax, [ecx+8]");			// check exponent

 	asm("cmp eax, 0xFFFF0000");			// check for NaN or infinity

 	asm("jnc short isfinite0");			// branch if NaN or infinity

 	asm("mov eax, 1");					// return 1 if finite

 	THISCALL_EPILOG0()

 	asm("isfinite0:");

 	asm("xor eax, eax");				// return 0 if NaN or infinity

 	THISCALL_EPILOG0()

 	}

 __NAKED__ EXPORT_C const TRealX& TRealX::operator+=(const TRealX& /*aVal*/)

 /**

 Adds an extended precision value to this extended precision number.

 @param aVal The extended precision value to be added.

 @return A reference to this object.

 @panic MATHX KErrOverflow if the operation results in overflow.

 @panic MATHX KErrUnderflow if  the operation results in underflow.

 */

 	{

 	// on entry ecx=this, [esp+4]=address of aVal

 	THISCALL_PROLOG1()

 	asm("push ebx");					// save registers

 	asm("push ebp");

 	asm("push esi");

 	asm("push edi");

 	asm("mov esi, ecx");				// this into esi

 	asm("mov ecx, [esp+20]");			// address of aVal into ecx

 	asm("mov ebx, [ecx]");				// aVal into ecx,edx:ebx

 	asm("mov edx, [ecx+4]");

 	asm("mov ecx, [ecx+8]");

 	asm("call %a0": :"i"(&TRealXAdd));	// do addition, result in ecx,edx:ebx, error code in eax

 	asm("mov [esi], ebx");				// store result in *this

 	asm("mov [esi+4], edx");

 	asm("mov [esi+8], ecx");

 	asm("test eax, eax");

 	_ASM_jn(z,TRealXPanicEax)			// panic if error

 	asm("mov eax, esi");				// return this in eax

 	asm("mov ecx, esi");				// restore registers

 	asm("pop edi");

 	asm("pop esi");

 	asm("pop ebp");

 	asm("pop ebx");

 	THISCALL_EPILOG1()

 	}

 __NAKED__ EXPORT_C const TRealX& TRealX::operator-=(const TRealX& /*aVal*/)

 /**

 Subtracts an extended precision value from this extended precision number.

 @param aVal The extended precision value to be subtracted.

 @return A reference to this object.

 @panic MATHX KErrOverflow if the operation results in overflow.

 @panic MATHX KErrUnderflow if  the operation results in underflow.

 */

 	{

 	// on entry ecx=this, [esp+4]=address of aVal

 	THISCALL_PROLOG1()

 	asm("push ebx");						// save registers

 	asm("push ebp");

 	asm("push esi");

 	asm("push edi");

 	asm("mov esi, ecx");					// this into esi

 	asm("mov ecx, [esp+20]");				// address of aVal into ecx

 	asm("mov ebx, [ecx]");					// aVal into ecx,edx:ebx

 	asm("mov edx, [ecx+4]");

 	asm("mov ecx, [ecx+8]");

 	asm("call %a0": : "i"(&TRealXSubtract));	// do subtraction, result in ecx,edx:ebx, error code in eax

 	asm("mov [esi], ebx");					// store result in *this

 	asm("mov [esi+4], edx");

 	asm("mov [esi+8], ecx");

 	asm("test eax, eax");

 	_ASM_jn(z,TRealXPanicEax)				// panic if error

 	asm("mov eax, esi");					// return this in eax

 	asm("mov ecx, esi");					// restore registers

 	asm("pop edi");

 	asm("pop esi");

 	asm("pop ebp");

 	asm("pop ebx");

 	THISCALL_EPILOG1()

 	}

 __NAKED__ EXPORT_C const TRealX& TRealX::operator*=(const TRealX& /*aVal*/)

 /**

 Multiplies this extended precision number by an extended precision value.

 @param aVal The extended precision value to be subtracted.

 @return A reference to this object.

 @panic MATHX KErrOverflow if the operation results in overflow.

 @panic MATHX KErrUnderflow if  the operation results in underflow.

 */

 	{

 	// on entry ecx=this, [esp+4]=address of aVal

 	THISCALL_PROLOG1()

 	asm("push ebx");					// save registers

 	asm("push ebp");

 	asm("push esi");

 	asm("push edi");

 	asm("mov esi, ecx");				// esi = this

 	asm("mov ecx, [esp+20]");			// address of aVal into ecx

 	asm("mov ebx, [ecx]");				// aVal into ecx,edx:ebx

 	asm("mov edx, [ecx+4]");

 	asm("mov ecx, [ecx+8]");

 	asm("call %a0": : "i"(&TRealXMultiply)); // do multiplication, result in ecx,edx:ebx, error code in eax

 	asm("mov [esi], ebx");				// store result in *this

 	asm("mov [esi+4], edx");

 	asm("mov [esi+8], ecx");

 	asm("test eax, eax");

 	_ASM_jn(z,TRealXPanicEax)			// panic if error

 	asm("mov eax, esi");				// return this in eax

 	asm("mov ecx, esi");				// restore registers

 	asm("pop edi");

 	asm("pop esi");

 	asm("pop ebp");

 	asm("pop ebx");

 	THISCALL_EPILOG1()

 	}

 __NAKED__ EXPORT_C const TRealX& TRealX::operator/=(const TRealX& /*aVal*/)

 /**

 Divides this extended precision number by an extended precision value.

 @param aVal The extended precision value to be used as the divisor.

 @return A reference to this object.

 @panic MATHX KErrOverflow if the operation results in overflow.

 @panic MATHX KErrUnderflow if  the operation results in underflow.

 @panic MATHX KErrDivideByZero if the divisor is zero.

 */

 	{

 	// on entry ecx=this, [esp+4]=address of aVal

 	THISCALL_PROLOG1()

 	asm("push ebx");

 	asm("push ebp");

 	asm("push esi");

 	asm("push edi");

 	asm("mov esi, ecx");				// this into esi

 	asm("mov ecx, [esp+20]");			// address of aVal into ecx

 	asm("mov ebx, [ecx]");				// aVal into ecx,edx:ebx

 	asm("mov edx, [ecx+4]");

 	asm("mov ecx, [ecx+8]");

 	asm("call %a0": : "i"(&TRealXDivide));	// do division, result in ecx,edx:ebx, error code in eax

 	asm("mov [esi], ebx");				// store result in *this

 	asm("mov [esi+4], edx");

 	asm("mov [esi+8], ecx");

 	asm("test eax, eax");

 	_ASM_jn(z,TRealXPanicEax)			// panic if error

 	asm("mov eax, esi");				// return this in eax

 	asm("mov ecx, esi");				// restore registers

 	asm("pop edi");

 	asm("pop esi");

 	asm("pop ebp");

 	asm("pop ebx");

 	THISCALL_EPILOG1()

 	}

 __NAKED__ EXPORT_C const TRealX& TRealX::operator%=(const TRealX& /*aVal*/)

 /**

 Modulo-divides this extended precision number by an extended precision value.

 @param aVal The extended precision value to be used as the divisor.

 @return A reference to this object.

 @panic MATHX KErrTotalLossOfPrecision panic if precision is lost.

 @panic MATHX KErrUnderflow if  the operation results in underflow.

 */

 	{

 	// on entry ecx=this, [esp+4]=address of aVal

 	THISCALL_PROLOG1()

 	asm("push ebx");

 	asm("push ebp");

 	asm("push esi");

 	asm("push edi");

 	asm("mov esi, ecx");				// this into esi

 	asm("mov ecx, [esp+20]");			// address of aVal into ecx

 	asm("mov ebx, [ecx]");				// aVal into ecx,edx:ebx

 	asm("mov edx, [ecx+4]");

 	asm("mov ecx, [ecx+8]");

 	asm("call %a0": : "i"(&TRealXModulo));	// do modulo, result in ecx,edx:ebx, error code in eax

 	asm("mov [esi], ebx");				// store result in *this

 	asm("mov [esi+4], edx");

 	asm("mov [esi+8], ecx");

 	asm("test eax, eax");

 	_ASM_jn(z,TRealXPanicEax)			// panic if error

 	asm("mov eax, esi");				// return this in eax

 	asm("mov ecx, esi");				// restore registers

 	asm("pop edi");

 	asm("pop esi");

 	asm("pop ebp");

 	asm("pop ebx");

 	THISCALL_EPILOG1()

 	}

 __NAKED__ EXPORT_C TInt TRealX::AddEq(const TRealX& /*aVal*/)

 /**

 Adds an extended precision value to this extended precision number.

 @param aVal The extended precision value to be added.

 @return KErrNone, if the operation is successful;

 KErrOverflow,if the operation results in overflow;

 KErrUnderflow, if the operation results in underflow.

 */

 	{

 	// on entry ecx=this, [esp+4]=address of aVal

 	THISCALL_PROLOG1()

 	asm("push ebx");					// save registers

 	asm("push ebp");

 	asm("push esi");

 	asm("push edi");

 	asm("mov esi, ecx");				// this into esi

 	asm("mov ecx, [esp+20]");			// address of aVal into ecx

 	asm("mov ebx, [ecx]");				// aVal into ecx,edx:ebx

 	asm("mov edx, [ecx+4]");

 	asm("mov ecx, [ecx+8]");

 	asm("call %a0": :"i"(&TRealXAdd));	// do addition, result in ecx,edx:ebx, error code in eax

 	asm("mov [esi], ebx");				// store result

 	asm("mov [esi+4], edx");

 	asm("mov [esi+8], ecx");

 	asm("mov ecx, esi");				// restore registers

 	asm("pop edi");

 	asm("pop esi");

 	asm("pop ebp");

 	asm("pop ebx");

 	THISCALL_EPILOG1()					// return with error code in eax

 	}

 __NAKED__ EXPORT_C TInt TRealX::SubEq(const TRealX& /*aVal*/)

 /**

 Subtracts an extended precision value from this extended precision number.

 @param aVal The extended precision value to be subtracted.

 @return KErrNone, if the operation is successful;

 KErrOverflow, if the operation results in overflow;

 KErrUnderflow, if the operation results in underflow.

 */

 	{

 	// on entry ecx=this, [esp+4]=address of aVal

 	THISCALL_PROLOG1()

 	asm("push ebx");					// save registers

 	asm("push ebp");

 	asm("push esi");

 	asm("push edi");

 	asm("mov esi, ecx");				// this into esi

 	asm("mov ecx, [esp+20]");			// address of aVal into ecx

 	asm("mov ebx, [ecx]");				// aVal into ecx,edx:ebx

 	asm("mov edx, [ecx+4]");

 	asm("mov ecx, [ecx+8]");

 	asm("call %a0": : "i"(&TRealXSubtract));	// do subtraction, result in ecx,edx:ebx, error code in eax

 	asm("mov [esi], ebx");				// store result

 	asm("mov [esi+4], edx");

 	asm("mov [esi+8], ecx");

 	asm("mov ecx, esi");				// restore registers

 	asm("pop edi");

 	asm("pop esi");

 	asm("pop ebp");

 	asm("pop ebx");

 	THISCALL_EPILOG1()					// return with error code in eax

 	}

 __NAKED__ EXPORT_C TInt TRealX::MultEq(const TRealX& /*aVal*/)

 /**

 Multiplies this extended precision number by an extended precision value.

 @param aVal The extended precision value to be used as the multiplier.

 @return KErrNone, if the operation is successful;

 KErrOverflow, if the operation results in overflow;

 KErrUnderflow, if the operation results in underflow

 */

 	{

 	// on entry ecx=this, [esp+4]=address of aVal

 	THISCALL_PROLOG1()

 	asm("push ebx");					// save registers

 	asm("push ebp");

 	asm("push esi");

 	asm("push edi");

 	asm("mov esi, ecx");				// this into esi

 	asm("mov ecx, [esp+20]");			// address of aVal into ecx

 	asm("mov ebx, [ecx]");				// aVal into ecx,edx:ebx

 	asm("mov edx, [ecx+4]");

 	asm("mov ecx, [ecx+8]");

 	asm("call %a0": : "i"(&TRealXMultiply));	// do multiplication, result in ecx,edx:ebx, error code in eax

 	asm("mov [esi], ebx");				// store result

 	asm("mov [esi+4], edx");

 	asm("mov [esi+8], ecx");

 	asm("mov ecx, esi");				// restore registers

 	asm("pop edi");

 	asm("pop esi");

 	asm("pop ebp");

 	asm("pop ebx");

 	THISCALL_EPILOG1()					// return with error code in eax

 	}

 __NAKED__ EXPORT_C TInt TRealX::DivEq(const TRealX& /*aVal*/)

 /**

 Divides this extended precision number by an extended precision value.

 @param aVal The extended precision value to be used as the divisor.

 @return KErrNone, if the operation is successful;

 KErrOverflow, if the operation results in overflow;

 KErrUnderflow, if the operation results in underflow;

 KErrDivideByZero, if the divisor is zero.

 */

 	{

 	// on entry ecx=this, [esp+4]=address of aVal

 	THISCALL_PROLOG1()

 	asm("push ebx");						// save registers

 	asm("push ebp");

 	asm("push esi");

 	asm("push edi");

 	asm("mov esi, ecx");					// this into esi

 	asm("mov ecx, [esp+20]");				// address of aVal into ecx

 	asm("mov ebx, [ecx]");					// aVal into ecx,edx:ebx

 	asm("mov edx, [ecx+4]");

 	asm("mov ecx, [ecx+8]");

 	asm("call %a0": : "i"(&TRealXDivide));	// do division, result in ecx,edx:ebx, error code in eax

 	asm("mov [esi], ebx");					// store result

 	asm("mov [esi+4], edx");

 	asm("mov [esi+8], ecx");

 	asm("mov ecx, esi");					// restore registers

 	asm("pop edi");

 	asm("pop esi");

 	asm("pop ebp");

 	asm("pop ebx");

 	THISCALL_EPILOG1()						// return with error code in eax

 	}

 __NAKED__ EXPORT_C TInt TRealX::ModEq(const TRealX& /*aVal*/)

 /**

 Modulo-divides this extended precision number by an extended precision value.

 @param aVal The extended precision value to be used as the divisor.

 @return KErrNone, if the operation is successful;

 KErrTotalLossOfPrecision, if precision is lost;

 KErrUnderflow, if the operation results in underflow.

 */

 	{

 	// on entry ecx=this, [esp+4]=address of aVal

 	THISCALL_PROLOG1()

 	asm("push ebx");					// save registers

 	asm("push ebp");

 	asm("push esi");

 	asm("push edi");

 	asm("mov esi, ecx");				// this into esi

 	asm("mov ecx, [esp+20]");			// address of aVal into ecx

 	asm("mov ebx, [ecx]");				// aVal into ecx,edx:ebx

 	asm("mov edx, [ecx+4]");

 	asm("mov ecx, [ecx+8]");

 	asm("call %a0": : "i"(&TRealXModulo));	// do modulo, result in ecx,edx:ebx, error code in eax

 	asm("mov [esi], ebx");				// store result

 	asm("mov [esi+4], edx");

 	asm("mov [esi+8], ecx");

 	asm("mov ecx, esi");				// restore registers

 	asm("pop edi");

 	asm("pop esi");

 	asm("pop ebp");

 	asm("pop ebx");

 	THISCALL_EPILOG1()					// return with error code in eax

 	}

 __NAKED__ EXPORT_C TRealX TRealX::operator+() const

 /**

 Returns this extended precision number unchanged.

 Note that this may also be referred to as a unary plus operator.

 @return The extended precision number.

 */

 	{

 	THISCALL_PROLOG0_BIGRETVAL()

 	asm("mov eax, [esp+4]");			// eax=address to write return value

 	asm("mov edx, [ecx]");

 	asm("mov [eax], edx");

 	asm("mov edx, [ecx+4]");

 	asm("mov [eax+4], edx");

 	asm("mov edx, [ecx+8]");

 	asm("mov [eax+8], edx");			// return address of return value in eax

 	THISCALL_EPILOG0_BIGRETVAL()

 	}

 __NAKED__ EXPORT_C TRealX TRealX::operator-() const

 /**

 Negates this extended precision number.

 This may also be referred to as a unary minus operator.

 @return The negative of the extended precision number.

 */

 	{

 	THISCALL_PROLOG0_BIGRETVAL()		

 	asm("mov eax, [esp+4]");			// eax=address to write return value

 	asm("mov edx, [ecx]");

 	asm("mov [eax], edx");

 	asm("mov edx, [ecx+4]");

 	asm("mov [eax+4], edx");

 	asm("mov edx, [ecx+8]");

 	asm("xor dl, 1");					// change sign bit

 	asm("mov [eax+8], edx");			

 	THISCALL_EPILOG0_BIGRETVAL()		// return address of return value in eax

 	}

 __NAKED__ EXPORT_C TRealX& TRealX::operator++()

 /**

 Increments this extended precision number by one,

 and then returns a reference to it.

 This is also referred to as a prefix operator.

 @return A reference to this object.