Algorithms
This web page contains algorithms that I had been developing over the years and
that were publishes in my book mentioned on the C.V. page. The algorithms belong to the domain of
Computer Raster Graphics, Integer Computations and Numerical Analysis.
The algorithms from the area of the Computer Raster Graphics and Integer Computations are based
on the theorem of eushaustia (i.e. searching) in quantum field that claims that we can find target
quantum position in the quantum domain in the finite number of iterations with the binary search
approach.
These algorithms are especially suitable for implementation in silicon.
Further in the text it will be shown that the quantum algorithm can compute the cosines, logarithm
and exponent. Although the approach is not fast it is very accurate.
Quantum Dividing Algorithm
Dividing algorithm is very simple and yet really effective. Usage of the algorithm is demonstrated in the program BigNum freely available for download on the site.
Quantum Dividing Algorithm
DECLARE SUB QDIV (c%, a%, b%)
DECLARE SUB PUSH (a%)
DECLARE SUB POP (a%)
CLS
DIM SHARED STCK(1000) AS INTEGER, SP AS INTEGER
SP = 0
INPUT "A = ", a%
INPUT "B = ", b%
PRINT a%; "\"; b%; "=";
QDIV c%, a%, b%
PRINT c%, a%
END
SUB QDIV (DX%, AX%, CX%)
DX% = 1
DX% = AX%
DO
CX% = -DX%
CX% = DX% AND CX%
DX% = DX% - CX%
LOOP WHILE DX%
SWAP CX%, DX%
SI% = DX%
DO
DX% = DX% \ 2
CX% = CX% + 1
LOOP WHILE DX%
CX% = CX% - 1
DX% = SI%
DI% = CX%
SI% = SI% \ 2
DO
DI% = DI% \ 2
IF DX% + SI% <= AX% THEN
DX% = DX% + SI%
CX% = CX% + DI%
END IF
SI% = SI% \ 2
LOOP WHILE SI%
END SUB
Demonstration of the quantum integer-dividing algorithm is available in the source of the calculator’s program “BigNum” available on the site.
This algorithm is neither public domain nor freeware. If you charge money using it within a product you sell, you require a commercial license.
Quantum Integer Square Rooting
The algorithm uses only simple processor arithmetic instructions like addition, subtraction, shifting and comparation. Furthermore, the algorithm is scalable and it can be applied on the input argument of arbitrary size. It has fixed number of iterations. The number of iterations that are necessary to reach correct result is equal to the half number of bits of input argument or the number of bits in output argument that holds the result, not the other one that holds remainder. All the variables in the routine have the same size in bits as the input parameter.
The algorithm yields the results and remainder too. It uses only addition, subtraction and shifting and thus it is very suitable to be utilized into chips.
It is completely based on the theory of dividing of the interval based on the formula:
(1)
(x ± Δx)^{2} = x^{2} ± 2 · x · Δx + Δx^{2}
So we have the basic idea described by the routine:
FUNCTION SQRI (IN)
DX = 128
DX2 = 16384
X = 0
DO
X21 = X2 + 2 * X * DX + DX2
DO WHILE X21 > IN
DX = DX / 2
DX2 = DX2 / 4
X21 = X2 + 2 * X * DX + DX2
LOOP
X2 = X21
X = X + DX
DX = DX / 2
DX2 = DX2 / 4
LOOP WHILE DX
SQRI = X
END FUNCTION
After a few rudimental optimizations we have:
Quantum Square Rooting Algorithm
DECLARE FUNCTION ISQR% (DI%)
DEFINT A-Z
INPUT "X = ", DI
PRINT ISQR(DI)
END
FUNCTION ISQR% (DI)
SI = 0
DX = 0
AL = 0
AH = 128
BX = 16384
DO
CX = SI + DX + BX
DX = DX \ 2
IF DI >= CX THEN
SI = CX
AL = AL + AH
DX = DX + BX
END IF
BX = BX \ 4
AH = AH \ 2
LOOP WHILE AH
ISQR% = AL
END FUNCTION
The above algorithm could be more optimized and then it becomes:
‘AX = Input
‘DX = Output
‘BX = Remainder
Sub SQRT(AX As Long, DX As Long, BX As Long)
Dim SI As Long, DI As Long
BX = 0
DX = 0
DI = 1073741824 'I.e. 2n-2
Do
SI = BX + DX + DI
DX = DX \ 2
If AX >= SI Then
BX = SI
DX = DX + DI
End If
DI = DI \ 4
Loop While DI
BX = AX - BX
End Sub
The basic demonstration of the routine is given by the following DOS program in I80286 assembly language that computes square root from the users’ input:
;Author of program & algorithm:
;Andrija Radovic
;E-mail: andrija_radovic@andrijar.com
;Web: http:www.andrijar.com
;Adress:
;Nike Strugara 13a
;11030 Beograd,
;Yugoslavia
;Copyright C1990-2003
.MODEL TINY
.386C
.CODE
ORG 100H
SQRTD3_4:
PUSH CS
PUSH CS
POP DS
POP ES
M_DO:
LEA SI, WC
LEA DI, W8
CALL COPYSTD
CALL PUT_WL
CALL TSPACE
LEA SI, WC
LEA DI, W8
CALL COPYSTD
CALL SQRT_WX
CALL PUT_WL
CALL TSPACE
LEA SI, W9
LEA DI, W8
CALL COPYSTD
CALL PUT_WL
CALL NEW_ROW
LEA DI, WC
;LEA SI, WADD
LEA SI, W9
CALL ADD_DS
MOV AH, 6
MOV DL, 0FFH
INT 21H
CMP AL, 27
JNZ M_DO
RET
CELLS EQU 6
STEP EQU 4
TOTAL EQU STEP * CELLS
COUNT EQU TOTAL - STEP
TSPACE PROC
LEA DX, SPCL
MOV AH, 9
INT 21H
RET
TSPACE ENDP
NEW_ROW PROC
LEA DX, NEWROWL
MOV AH, 9
INT 21H
RET
NEW_ROW ENDP
ADD_DS PROC
STD
MOV ECX, CELLS
ADD SI, COUNT
SUB DI, STEP
CLC
ADD_DS_D0:
LODSD
ADC [EDI + STEP * ECX], EAX
LOOP ADD_DS_D0
RET
ADD_DS ENDP
SUB_DS PROC
STD
MOV ECX, CELLS
ADD SI, COUNT
SUB DI, STEP
CLC
SUB_DS_D0:
LODSD
SBB [EDI + STEP * ECX], EAX
LOOP SUB_DS_D0
RET
SUB_DS ENDP
CMP_DS PROC
STD
MOV ECX, CELLS
ADD SI, COUNT
SUB DI, STEP
CLC
CMP_DS_D0:
LODSD
SBB EAX, [EDI + STEP * ECX]
LOOP CMP_DS_D0
RET
CMP_DS ENDP
SHR_D PROC
XOR EBX, EBX
MOV ECX, CELLS
SHR_D_D0:
RCR DWORD PTR [EDI + STEP * EBX], 1
INC EBX
LOOP SHR_D_D0
RET
SHR_D ENDP
IS_ZERO PROC
MOV ECX, CELLS
SUB EDI, STEP
XOR EBX, EBX
IS_ZERO_DO:
OR EBX, [EDI + STEP * ECX]
LOOP IS_ZERO_DO
RET
IS_ZERO ENDP
SETZD PROC
CLD
XOR EAX, EAX
MOV ECX, CELLS
REP STOSD
RET
SETZD ENDP
COPYSTD PROC
CLD
MOV ECX, CELLS
REP MOVSD
RET
COPYSTD ENDP
SQRT_WX PROC
LEA DI, QSI
CALL SETZD
LEA DI, QDX
CALL SETZD
LEA SI, QV1
LEA DI, QBX
CALL COPYSTD
START_DO:
LEA SI, QSI
LEA DI, QCX
CALL COPYSTD
LEA SI, QDX
LEA DI, QCX
CALL ADD_DS
LEA SI, QBX
LEA DI, QCX
CALL ADD_DS
LEA DI, QDX
CALL SHR_D
LEA SI, W8
LEA DI, QCX
CALL CMP_DS
JC END_IF
LEA SI, QCX
LEA DI, QSI
CALL COPYSTD
LEA DI, QDX
LEA SI, QBX
CALL ADD_DS
END_IF:
LEA DI, QBX
CALL SHR_D
CALL SHR_D
CALL IS_ZERO
JNZ START_DO
LEA SI, W8
LEA DI, W9
CALL COPYSTD
LEA DI, W9
LEA SI, QSI
CALL SUB_DS
LEA SI, QDX
LEA DI, W8
CALL COPYSTD
RET
SQRT_WX ENDP
PUT_WL PROC
LEA SI, RESULT
CLD
MOV EBP, 10
W8_DO0:
LEA DI, W8
XOR EDX, EDX
MOV EBX, EDX
MOV CX, CELLS - 1
W8_DO1:
MOV EAX, [DI]
DIV EBP
STOSD
OR BX, AX
LOOP W8_DO1
MOV EAX, [DI]
DIV EBP
MOV [DI], EAX
DEC SI
ADD DL, 48
MOV [SI], DL
OR EBX, EAX
JNZ W8_DO0
MOV DX, SI
MOV AH, 9
INT 21H
RET
PUT_WL ENDP
INTRES DB 60 DUP(?)
RESULT DB '$'
SPCL DB ' $'
NEWROWL DB 13, 10, '$'
WADD DD 0, 0, 1, 431E0FAEH, 6D7217CAH, 0A0000000H
WC DD 28C87CB5H, 0C89A2571H, 0EBFDCB54H, 864ADA83H, 4A000000H, 0
QV1 DD 40000000H, (CELLS - 1) DUP(0)
W8 DD CELLS DUP(?)
W9 DD CELLS DUP(?)
QSI DD CELLS DUP(?)
QDX DD CELLS DUP(?)
QBX DD CELLS DUP(?)
QCX DD CELLS DUP(?)
QAH DD CELLS DUP(?)
QDI DD CELLS DUP(?)
END SQRTD3_4
This algorithm is protected by copyright low and thus it can be distributed under
certain conditions only: the algorithm is free for non-commercial use. |
Source code is availabe below:
This algorithm is protected by copyright low and thus it can be distributed under
certain conditions only: the algorithm is free for non-commercial use. |
Demo routine given in ASM that demonstrate the integer square rooting of the 24
byte long input arguments and the biggest number that has to be sent to the routine is
6277101735386680763835789423207666416102355444464034512895. The routine is quite scalable and its precision can be easily expanded.
Its output is shown on the picture below:
You can download demo program by pressing the button below:
This algorithm is protected by copyright low and thus it can be distributed under
certain conditions only: the algorithm is free for non-commercial use. |
You can download its source code in Masm assembly language by pressing the button below:
This algorithm is protected by copyright low and thus it can be distributed under
certain conditions only: the algorithm is free for non-commercial use. |
These routine should work from DOS or DOS Windows.
Quantum Line Drawing algorithm
There are several algorithms for line drawing too. These algorithms have only
one question per break and one integer dividing on the beginning. The algorithms are extremely
fast and suitable for silicon’s implementation.
The algorithm is based on the quite different premises than the Bresenham’s one.
The algorithm is especially optimized to work with the bit-planes and black/white images and
thus it is suitable to be utilized in laser printers.
The main characteristic of the algorithm is equal widths of middle-breaks of line as it is
shown on the picture right of the text.
Basic demonstration of the algorithm is given on the following listing:
SCREEN 12
FOR i% = 0 TO 639 STEP 10
KOSLINE 0, 0, i%, 199
NEXT
FOR i% = 195 TO 0 STEP -5
KLINE 0, 0, 639, i%
NEXT
END
SUB HLINE (x1%, x2%, y%)
LINE (x1%, y%)-(x2%, y%)
END SUB
SUB KLINE (x1%, y1%, x2%, y2%)
dx% = ABS(x2% - x1%) + 1
dy% = ABS(y2% - y1%) + 1
b% = dy% - dx%
IF b% < 0 THEN
IF x1% > x2% THEN
SWAP x1%, x2%
SWAP y1%, y2%
END IF
IF y1% > y2% THEN
sign% = -1
ELSE
sign% = 1
END IF
c1% = dx% \ dy%
b% = b% + dx% - dx% MOD dy%
c1% = c1% + 1
xt% = x1%
e% = b% - 1
FOR y1% = y1% TO y2% STEP sign%
IF b% > 0 THEN
b% = b% - dy%
x1% = x1% - 1
END IF
b% = b% + e%
x1% = x1% + c1%
HLINE xt%, x1% - 1, y1%
xt% = x1%
NEXT
ELSE
IF y1% > y2% THEN
SWAP x1%, x2%
SWAP y1%, y2%
END IF
IF x1% > x2% THEN
sign% = -1
ELSE
sign% = 1
END IF
c1% = dy% \ dx%
b% = -b% + dy% - dy% MOD dx%
c1% = c1% + 1
e% = b% - 1
yt% = y1%
FOR x1% = x1% TO x2% STEP sign%
IF b% > 0 THEN
b% = b% - dx%
y1% = y1% - 1
END IF
b% = b% + e%
y1% = y1% + c1%
VLINE x1%, yt%, y1% - 1
yt% = y1%
NEXT
END IF
END SUB
SUB VLINE (x%, y1%, y2%)
LINE (x%, y1%)-(x%, y2%)
END SUB
Screen of the DEMOVGA assembly program:
For downloading demonstration code written for VGA DOS mode 12 in 80X86 assembler press the button (press any key for next stage):
This algorithm is protected by copyright low and thus it can be distributed under
certain conditions only: the algorithm is free for non-commercial use. |
For download of assembly source press button below:
This algorithm is protected by copyright low and thus it can be distributed under
certain conditions only: the algorithm is free for non-commercial use. |
Ega3d demo
For download of the algorithm that demonstrates the ability of its usage on the specific embedded weak hardware with monochrome video memory is demonstrated by the following program:
This algorithm is protected by copyright low and thus it can be distributed under
certain conditions only: the algorithm is free for non-commercial use. |
For download of assembly source press button below:
This algorithm is protected by copyright low and thus it can be distributed under
certain conditions only: the algorithm is free for non-commercial use. |
The routine designed to the True Color video devices is a different one and it
optimized to deal with the bigger piles of data dedicated to pixels consisted at least of byte
triplets.
Lines draw by the algorithm are shown on the right picture.
The essential of the algorithm is presented by the following listing in Basic:
SCREEN 13
DEF SEG = &HA000
CLS
FOR i% = 0 TO 319
kline1 0, 0, i%, 199, (i% MOD 254) + 1
NEXT
FOR i% = 199 TO 0 STEP -1
kline1 0, 0, 319, i%, (i% MOD 254) + 1
NEXT
END
SUB hline (a%, b%, c%)
LINE (a%, c%)-(b%, c%)
END SUB
SUB kline1 (x1%, y1%, x2%, y2%, col%)
dx% = ABS(x2% - x1%) + 1
dy% = ABS(y2% - y1%) + 1
IF dx% > dy% THEN
IF x1% > x2% THEN
SWAP x1%, x2%
SWAP y1%, y2%
END IF
IF y1% > y2% THEN dl% = -320 ELSE dl% = 320
c% = dy%
l% = dx% \ dy%
o% = 2 * (dx% MOD dy%)
a& = y1% * 320& + x1%
FOR i% = 1 TO dy%
k% = l%
c% = c% - o%
IF c% < 0 THEN
c% = c% + 2 * dy%
k% = k% + 1
END IF
FOR j% = 1 TO k%
POKE a&, col%
a& = a& + 1
NEXT
a& = a& + dl%
NEXT
ELSE
IF y1% > y2% THEN
SWAP x1%, x2%
SWAP y1%, y2%
END IF
IF x1% > x2% THEN dl% = -1 ELSE dl% = 1
c% = dx%
l% = dy% \ dx%
o% = 2 * (dy% MOD dx%)
a& = y1% * 320& + x1%
FOR i% = 1 TO dx%
k% = l%
c% = c% - o%
IF c% < 0 THEN
c% = c% + 2 * dx%
k% = k% + 1
END IF
FOR j% = 1 TO k%
POKE a&, col%
a& = a& + 320
NEXT
a& = a& + dl%
NEXT
END IF
END SUB
SUB vline (a%, b%, c%)
LINE (a%, b%)-(a%, c%)
END SUB
For download of the assembly-coded program that demonstrates the algorithm press the button below (press any key for next stage):
This algorithm is protected by copyright low and thus it can be distributed under
certain conditions only: the algorithm is free for non-commercial use. |
For download of assembly source press button below:
This algorithm is protected by copyright low and thus it can be distributed under
certain conditions only: the algorithm is free for non-commercial use. |
Ellipse Drawing Algorithm
The algorithm is based on the same premises as the Bresenham’s Circle drawing algorithm. The algorithm uses few multiplications on its start and it is able to draw ellipse with the addition and subtraction. Maximal width in bits of the registers used in the routine is twice of width of input parameters.
Algorithm is given by following listing:
DECLARE SUB elipse (xx%, yy%, r1%, r2%)
DECLARE SUB eplot (x%, y%, a%, b%)
SCREEN 11
elipse 320, 240, 310, 100
elipse 320, 240, 100, 230
END
SUB elipse (xx%, yy%, r1%, r2%)
rr1& = r1% * CLNG(r1%)
r21& = rr1& + rr1&
r41& = r21& + r21&
rr2& = r2% * CLNG(r2%)
r22& = rr2& + rr2&
r42& = r22& + r22&
k& = r2% * r21&
p& = r41& + r42&
cc& = r22& + rr1& - k&
k& = k& + k&
rf2& = -r41&
r22& = r22& + p&
x% = 0
y% = r2%
DO
eplot xx%, yy%, x%, y%
IF cc& >= 0 THEN
y% = y% - 1
k& = k& - r41&
cc& = cc& - k&
END IF
cc& = cc& + rf2& + r22&
rf2& = rf2& + r42&
x% = x% + 1
LOOP UNTIL rf2& > k&
r22& = r22& - p&
k& = r1% * r22&
cc& = r21& + rr2& - k&
k& = k& + k&
rf1& = -r42&
r21& = r21& + p&
x% = r1%
y% = 0
DO
eplot xx%, yy%, x%, y%
IF cc& >= 0 THEN
x% = x% - 1
k& = k& - r42&
cc& = cc& - k&
END IF
cc& = cc& + rf1& + r21&
rf1& = rf1& + r41&
y% = y% + 1
LOOP UNTIL rf1& > k&
END SUB
SUB eplot (x%, y%, a%, b%)
PSET (x% + a%, y% + b%)
PSET (x% + a%, y% - b%)
PSET (x% - a%, y% + b%)
PSET (x% - a%, y% - b%)
END SUB
All rights reserved. The algorithm is property of its author and it cannot be
incorporated in any chip or hardware without prior explicit author’s agreement.
If you charge money using it within a product you sell, you require a commercial license!
TRANSCEDENTAL FUNCTIONS AND QUANTUM SPACE
Quantum theory is able to compute the values of the classic transcendental
functions like sinus, cosines, exponential and logarithm although it is not recommended way of
computing these functions. These methods are important for theoretical aspects only. These all
show that formal mathematics is the most powerful on the analytical functions and its ability to
bring us computational solutions of arbitrary analytical function by Taylor’s actually feeds its
power from the analytical definitions of their derivations. It means that actually we are not able
to find the whole curve only by one its point and we are able to do this on the analytical curves:
we first find the values in the convergence radius away from the beginning point and so one.
Recursively we can reach every point on the curve on the way.
So, we can agree that the following relations are neither the magic nor the hoax because these rules
are applicable only on analytical functions.
LOGARITHM FUNCTION IN QUANTUM SPACE
The following relation defines logarithm function:
(2)
So we have:
(3)
And:
(4)
The following program computes the value of LOG_{n}(x) in the predefined interval:
DEFDBL A-Z
fa = 0#
fb = 10#
a = 1#
b = 1024#
e = 0#
DO
INPUT "k = ", k
IF k >= a AND k <= b THEN EXIT DO
PRINT "k must be between 1 & 1024."
PRINT
LOOP
DO
c = SQR(a * b)
fc = .5# * (fa + fb)
IF k < c THEN
b = c
fb = fc
ELSE
a = c
fa = fc
END IF
PRINT a; b; c, fc
LOOP UNTIL ABS(c - k) <= e
PRINT
PRINT
PRINT "LOG(" + STR$(k) + " ) ="; STR$(fc)
END
EXPONENTIAL FUNCTION IN QUANTUM SPACE
Exponential function is defined by the following relation:
(5)
The following program demonstrates computing of the exponential function:
DEFDBL A-Z
fa = 1#
fb = 1024#
a = 0#
b = 10#
e = 0#
DO
INPUT "k = ", k
IF k >= a AND k <= b THEN EXIT DO
PRINT "k must be between 0 & 10."
PRINT
LOOP
DO
c = .5# * (a + b)
fc = SQR(fa * fb)
IF k < c THEN
b = c
fb = fc
ELSE
a = c
fa = fc
END IF
PRINT a; b; c, fc
LOOP UNTIL ABS(c - k) <= e
PRINT
PRINT
PRINT "EXP(" + STR$(k) + " ) ="; STR$(fc)
END
SINE and COSINE
The following relation defines cosine function:
(6)
The following program demonstrates computing of the cosines function:
CLS
INPUT x#
r# = 3.1415926589793#
'r# = 180#
l# = 0#
cr# = -1
cl# = 1
a# = .5# * (r# + l#)
ca# = 0
'PRINT ca#: STOP
i% = 0
e# = .000000000000001#
DO
i% = i% + 1
PRINT "Pokusaj"; i%, a#, x#, ca#
IF x# < a# THEN
r# = a#
cr# = ca#
ELSE
l# = a#
cl# = ca#
END IF
a# = .5# * (l# + r#)
ca0# = ca#
ca# = .5# * (SQR((1# + cl#) * (1# + cr#)) - SQR((1# - cr#) * (1# - cl#)))
LOOP WHILE ABS(ca# - ca0#) > e#
PRINT
PRINT ca#, COS(x#)
END
Sine function is just π/2 translated Cosine function:
(7)
COS(x) = SIN(x + π / 2)
I.e.
(8)
SIN(x) = COS(x - π / 2)
These all are sufficient enough for computing of the Sine and Cosine functions.
DAY in Week
Following program computes day in week in wide range of dates using only integer arithmetic.
The algorithm is much better then classic one because it is not limited only to years after 1980. It covers whole AD range of time.
So, you can compute the day when the Newton or Shakespeare was born.
Program source:
DIM a$(6)
FOR i% = 0 TO 6
READ a$(i%)
NEXT
b$ = COMMAND$
IF b$ = "" THEN INPUT "Year-Month-Day: ", b$
IF LTRIM$(RTRIM$(b$)) = "" THEN END
i% = INSTR(b$, ".")
DO WHILE i%
MID$(b$, i%, 1) = "-"
i% = INSTR(i% + 1, b$, ".")
LOOP
i% = INSTR(b$, "-")
IF i% = 0 THEN END
j% = INSTR(i% + 1, b$, "-")
IF j% = 0 THEN END
g% = VAL(LEFT$(b$, i% - 1))
m% = VAL(MID$(b$, i% + 1, j% - i% - 1))
d% = VAL(MID$(b$, j% + 1, LEN(b$)))
IF m% < 1 OR m% > 12 THEN END
IF d% < 1 OR d% > 31 THEN END
a& = 1200& * g% + 100& * m% - 285&
b& = 100& * ((367& * a& \ 1200&) + d%) - 175& * (a& \ 1200&)
c& = 75& * (a& \ 120000)
dan% = (((b& - b& MOD 100& - c&) \ 100&) + 1721115) MOD 7&
PRINT "(C) Andrija Radovic"
PRINT "Day:"; d%
PRINT "Month:"; m%
PRINT "Year:"; g%
PRINT
PRINT "Day: "; a$(dan%)
END
DATA "Monday","Tuesday","Wednesday","Thursday","Friday","Saturday","Sunday"
All rights reserved. The algorithm is property of its author and it cannot be
incorporated in any chip or hardware without prior explicit author’s agreement.
If you charge money using it within a product you sell, you require a commercial license!
Assembly Haiku Poetry
And finally the abstract art of the haiku poetry in 80X86 assembly language: very short and very nice b/w plot routine for video mode 640x480x2:
PLOT
PROC ; DX = X, BX = Y
SHL
BX, 4
XOR
DX, 7
BTS
WORD PTR [EBX + 4 * EBX], DX
RET
PLOT ENDP
This routine demonstrates that the 80X86 processors’ architecture still could be very effective for use in laser printers as main graphic processor.
You can download the complete program that demonstrates implementation of the Bresenham circle by pressing the following button:
This algorithm is protected by copyright low and thus it can be distributed under
certain conditions only: the algorithm is free for non-commercial use. |
For download of assembly source press button below:
This algorithm is protected by copyright low and thus it can be distributed under
certain conditions only: the algorithm is free for non-commercial use. |
BINARY TO DECIMAL ASCII STRING
This text describes 6 methods for the conversion of binary value into the decimal ASCII string. Proper tutorial for such operation virtually does not exist on the Internet and all the proposed methods are AD-Hoc written ones mainly without appropriate theoretical background with the lack of experience in assembly language optimizations. Most of described method are quite unique in public publishing and often are rarely used despite their great quality. This is mainly caused by deterioration of programming skill and increase of coding efforts by assembling of routines from libraries in DLL-s existing on the market. The programmers essentially remains without the knowledge of operation of the basic knowledge of the routines they are assembling in the programs and therefore they hardly can guarantee the quality of their products. This article is one modest attempt to explain people that there are at least non trivial ways to convert binary content into corresponding ASCII string and that there is one trivial way for that to be done – by usage of the appropriate windows API call which is also tremendously slow:
;Author of the program and of all algorithms is Andrija Radovic, ;All Rights Reserved, ©2010. ;This code should be assembled with: ;\masm32\bin\ML.EXE /c /coff /Cp /nologo /I\Masm32\Include ASCIIwin.asm ;and linked with the following line: ;\masm32\bin\LINK.EXE /SUBSYSTEM:CONSOLE /RELEASE /VERSION:4.0 /LIBPATH:"\Masm32\Lib" /section:".text",ERW ASCIIwin.obj /OUT:ASCIIwin.exe .686 .MODEL flat, stdcall OPTION casemap :none ;case sensitive INCLUDE \masm32\include\windows.inc INCLUDE \masm32\include\kernel32.inc INCLUDELIB \masm32\lib\kernel32.lib INCLUDE \masm32\include\user32.inc INCLUDELIB \masm32\lib\user32.lib INCLUDE \masm32\include\masm32.inc INCLUDELIB \masm32\lib\masm32.lib ;--------------------------------------------------------------------------------------------------------- .DATA TESTS DB "This is the test...", 13, 10, 0 INTRES DB 0, 0, 0, 0, 0, 0, 0, 0, 0, 0 RESULT DB 0 ;--------------------------------------------------------------------------------------------------------- .STACK 20000 ;--------------------------------------------------------------------------------------------------------- .CODE ASCII: INVOKE StdOut, ADDR TESTS CALL TESTR INVOKE StdOut, ADDR TESTS CALL MAINN INVOKE StdOut, ADDR TESTS INVOKE ExitProcess, 0 ;--------------------------------------------------------------------------------------------------------- TESTV DD 0 TESTR PROC MOV TESTV, 3000000000 MOV EDX, TESTV CALL EDX2DEC CALL NEW_ROW MOV EAX, TESTV ADD EAX, 1 CALL EAX2SUB CALL NEW_ROW MOV ESI, TESTV ADD ESI, 2 CALL ESI2ASC CALL NEW_ROW MOV EAX, TESTV ADD EAX, 3 CALL EAX2ASC CALL NEW_ROW MOV EAX, TESTV ADD EAX, 4 CALL EAX2AST CALL NEW_ROW MOV EAX, TESTV ADD EAX, 5 CALL EAX2AFL CALL NEW_ROW MOV EAX, TESTV ADD EAX, 6 CALL EAX2DEC CALL NEW_ROW MOV EAX, TESTV ADD EAX, 7 CALL EAX2BTR CALL NEW_ROW MOV EAX, TESTV ADD EAX, 8 CALL EAXCMOV CALL NEW_ROW MOV EAX, TESTV ADD EAX, 9 CALL EAX2WIN CALL NEW_ROW MOV EAX, TESTV ADD EAX, 10 CALL EAX2BCD CALL NEW_ROW RET TESTR ENDP ;--------------------------------------------------------------------------------------------------------- MAINN PROC MOV TESTV, 1000000000 LL0: ;MOV EDX, TESTV ;CALL EDX2DEC MOV EAX, TESTV ;CALL EAX2ASC ;CALL EAX2DEC ;CALL EAX2AST ;CALL EAX2AFL ;CALL EAX2BTR ;CALL EAXCMOV CALL EAX2BCD CALL S_EQU MOV EAX, TESTV CALL EAX_SQR PUSH EDX ;CALL EAX2DEC ;CALL EAX2BTR ;CALL EAXCMOV CALL EAX2ASC ;CALL EAX2AST ;CALL EAX2AFL ;MOV ESI, EAX ;CALL ESI2ASC CALL S_PLUS ;POP EAX ;CALL EAX2SUB POP EAX ;CALL EAX2ASC CALL EAX2DEC ;CALL EAX2ASF ;CALL EAX2AST ;CALL EAX2AFL CALL NEW_ROW INC TESTV CMP TESTV, 1000000100 JLE LL0 RET MAINN ENDP ;--------------------------------------------------------------------------------------------------------- SPCL DB 9, 0 TSPACE PROC INVOKE StdOut, ADDR SPCL RET TSPACE ENDP ;--------------------------------------------------------------------------------------------------------- NEWROWL DB 13, 10, 0 NEW_ROW PROC INVOKE StdOut, ADDR NEWROWL RET NEW_ROW ENDP ;--------------------------------------------------------------------------------------------------------- EPE DB 253, " + ", 0 S_PLUS PROC INVOKE StdOut, ADDR EPE RET S_PLUS ENDP ;--------------------------------------------------------------------------------------------------------- EQE DB " = ", 0 S_EQU PROC INVOKE StdOut, ADDR EQE RET S_EQU ENDP ;--------------------------------------------------------------------------------------------------------- D00 DB 02, 1 D01 DB 02, 2 D02 DB 02, 4 D03 DB 03, 8, 0 D04 DB 03, 6, 1 D05 DB 03, 2, 3 D06 DB 04, 4, 6, 0 D07 DB 04, 8, 2, 1 D08 DB 04, 6, 5, 2 D09 DB 05, 2, 1, 5, 0 D10 DB 05, 4, 2, 0, 1 D11 DB 05, 8, 4, 0, 2 D12 DB 05, 6, 9, 0, 4 D13 DB 06, 2, 9, 1, 8, 0 D14 DB 06, 4, 8, 3, 6, 1 D15 DB 06, 8, 6, 7, 2, 3 D16 DB 07, 6, 3, 5, 5, 6, 0 D17 DB 07, 2, 7, 0, 1, 3, 1 D18 DB 07, 4, 4, 1, 2, 6, 2 D19 DB 08, 8, 8, 2, 4, 2, 5, 0 D20 DB 08, 6, 7, 5, 8, 4, 0, 1 D21 DB 08, 2, 5, 1, 7, 9, 0, 2 D22 DB 08, 4, 0, 3, 4, 9, 1, 4 D23 DB 09, 8, 0, 6, 8, 8, 3, 8, 0 D24 DB 09, 6, 1, 2, 7, 7, 7, 6, 1 D25 DB 09, 2, 3, 4, 4, 5, 5, 3, 3 D26 DB 10, 4, 6, 8, 8, 0, 1, 7, 6, 0 D27 DB 10, 8, 2, 7, 7, 1, 2, 4, 3, 1 D28 DB 10, 6, 5, 4, 5, 3, 4, 8, 6, 2 D29 DB 11, 2, 1, 9, 0, 7, 8, 6, 3, 5, 0 D30 DB 11, 4, 2, 8, 1, 4, 7, 3, 7, 0, 1 D31 DB 11, 8, 4, 6, 3, 8, 4, 7, 4, 1, 2 EDX2DEC PROC ;The routine prints ASCII STD ;decimal content of EDX register MOV DWORD PTR INTRES, 0 ;via BCD arithmetic AAA MOV DWORD PTR INTRES + 4, 0 ;instruction. MOV WORD PTR INTRES + 8, 0 ;Author: Andrija Radovic, ©2011 LEA EBX, D00 LEA EDI, 9 + INTRES PUT_I_DO: MOVZX ECX, BYTE PTR [EBX] SHR EDX, 1 JNC PUT_I_END_IF INC EBX DEC ECX XOR AX, AX LEA EDI, 9 + INTRES PUT_I_DO1: MOVZX AX, AH ADD AL, BYTE PTR [EDI] ADD AL, BYTE PTR [EBX] AAA STOSB INC EBX LOOPD PUT_I_DO1 PUT_I_END_IF: ADD EBX, ECX TEST EDX, EDX JNZ PUT_I_DO INC EDI OR DWORD PTR INTRES, "0000" OR DWORD PTR INTRES + 4, "0000" OR WORD PTR INTRES + 8, "00" XOR EDX, EDX CMP BYTE PTR [EDI], "0" SETZ DL ADD EDX, EDI CMP EDX, OFFSET RESULT SETZ CL SUB EDX, ECX CLD INVOKE StdOut, EDX RET EDX2DEC ENDP ;--------------------------------------------------------------------------------------------------------- ADDIT DW "00", "01", "02", "03", "04", "05", "06", "07", "08" DW "09", "10", "11", "12", "13", "14", "15", "16", "17" DW "18", "19", "20", "21", "22", "23", "24", "25", "26" DW "27", "28", "29", "30" WC DB 02, "1" DB 02, "2" DB 02, "4" DB 03, "8", "0" DB 03, "6", "1" DB 03, "2", "3" DB 04, "4", "6", "0" DB 04, "8", "2", "1" DB 04, "6", "5", "2" DB 05, "2", "1", "5", "0" DB 05, "4", "2", "0", "1" DB 05, "8", "4", "0", "2" DB 05, "6", "9", "0", "4" DB 06, "2", "9", "1", "8", "0" DB 06, "4", "8", "3", "6", "1" DB 06, "8", "6", "7", "2", "3" DB 07, "6", "3", "5", "5", "6", "0" DB 07, "2", "7", "0", "1", "3", "1" DB 07, "4", "4", "1", "2", "6", "2" DB 08, "8", "8", "2", "4", "2", "5", "0" DB 08, "6", "7", "5", "8", "4", "0", "1" DB 08, "2", "5", "1", "7", "9", "0", "2" DB 08, "4", "0", "3", "4", "9", "1", "4" DB 09, "8", "0", "6", "8", "8", "3", "8", "0" DB 09, "6", "1", "2", "7", "7", "7", "6", "1" DB 09, "2", "3", "4", "4", "5", "5", "3", "3" DB 10, "4", "6", "8", "8", "0", "1", "7", "6", "0" DB 10, "8", "2", "7", "7", "1", "2", "4", "3", "1" DB 10, "6", "5", "4", "5", "3", "4", "8", "6", "2" DB 11, "2", "1", "9", "0", "7", "8", "6", "3", "5", "0" DB 11, "4", "2", "8", "1", "4", "7", "3", "7", "0", "1" DB 11, "8", "4", "6", "3", "8", "4", "7", "4", "1", "2" EAX2BCD PROC ;The routine prints ASCII MOV DWORD PTR INTRES, "0000" ;decimal content of EDX register MOV DWORD PTR INTRES + 4, "0000" ;via BCD arithmetics on the MOV WORD PTR INTRES + 8, "00" ;ADDIT array. LEA EBX, WC ;No specific instruction is used. LEA EDI, 9 + INTRES ;Author: Andrija Radovic, ©2011 EAX2BCD_DO: MOVZX ECX, BYTE PTR [EBX] SHR EAX, 1 JNC EAX2BCD_END_IF INC EBX DEC ECX MOV DH, "0" LEA EDI, 9 + INTRES SUB EDI, ECX EAX2BCD_DO1: MOVZX EDX, DH ADD DL, BYTE PTR [EDI + ECX] ADD DL, BYTE PTR [EBX] MOV DX, WORD PTR [2 * EDX + OFFSET ADDIT - 6 * "0"] MOV BYTE PTR [EDI + ECX], DL INC EBX LOOPD EAX2BCD_DO1 EAX2BCD_END_IF: ADD EBX, ECX TEST EAX, EAX JNZ EAX2BCD_DO INC EDI XOR EDX, EDX CMP BYTE PTR [EDI], "0" SETZ DL ADD EDX, EDI CMP EDX, OFFSET RESULT SETZ CL SUB EDX, ECX INVOKE StdOut, EDX RET EAX2BCD ENDP ;--------------------------------------------------------------------------------------------------------- BASES DD 1000000000, 100000000, 10000000, 1000000, 100000, 10000, 1000, 100, 10, 1 NUMDIG DB 9, 9, 9, 8, 8, 8, 7, 7, 7, 6, 6, 6, 6, 5, 5, 5, 4, 4, 4, 3, 3, 3, 3, 2, 2, 2 DB 1, 1, 1, 0, 0, 0 EAX2SUB PROC ;The routine prints ASCII MOV DX, "00" - 101H ;decimal content of EAX register BSR EDI, EAX ;by repetitive subtractions CMOVZ EDI, EAX ;with coefficients pulled from MOVZX EDI, BYTE PTR [EDI + OFFSET NUMDIG] ;array with reducted number PUSH EDI ;of iteration. EAX2SUB_DO1: ;Author: Andrija Radovic, ©2011 MOV EBX, DWORD PTR [4 * EDI + OFFSET BASES] EBX_DO2: INC DL SUB EAX, EBX JNC EBX_DO2 MOV BYTE PTR [EDI + OFFSET INTRES], DL INC EDI MOV DL, DH ADD EAX, EBX JNZ EAX2SUB_DO1 POP EDI CMP BYTE PTR [EDI + OFFSET INTRES], "0" SETZ AL LEA EDI, [EDI + EAX + OFFSET INTRES] CMP EDI, OFFSET INTRES + 10 SETZ AL SUB EDI, EAX INVOKE StdOut, EDI RET EAX2SUB ENDP ;--------------------------------------------------------------------------------------------------------- ESI2ASC PROC ;The routine prints ASCII LEA EDI, INTRES ;decimal content of ESI register MOV AX, "00" - 101H ;by repetitive subtractions PUSH DWORD PTR 0 ;with coefficients pulled from PUSH DWORD PTR 1 ;stack without counter. PUSH DWORD PTR 10 ;Author: Andrija Radovic, ©2011 PUSH DWORD PTR 100 PUSH DWORD PTR 1000 PUSH DWORD PTR 10000 PUSH DWORD PTR 100000 PUSH DWORD PTR 1000000 PUSH DWORD PTR 10000000 PUSH DWORD PTR 100000000 MOV EBX, 1000000000 CLD EAS_DO1: EAS_DO2: INC AX SUB ESI, EBX JNC EAS_DO2 ADD ESI, EBX STOSB MOV AL, AH POP EBX TEST EBX, EBX JNZ EAS_DO1 MOV AL, "0" MOV ECX, 10 LEA EDI, INTRES REPE SCASB DEC EDI INVOKE StdOut, EDI RET ESI2ASC ENDP ;--------------------------------------------------------------------------------------------------------- ASCII_TABLE DW "00", "10", "20", "30", "40", "50", "60", "70", "80", "90", "00", "00" DW "00", "00", "00", "00", "01", "11", "21", "31", "41", "51", "61", "71" DW "81", "91", "00", "00", "00", "00", "00", "00", "02", "12", "22", "32" DW "42", "52", "62", "72", "82", "92", "00", "00", "00", "00", "00", "00" DW "03", "13", "23", "33", "43", "53", "63", "73", "83", "93", "00", "00" DW "00", "00", "00", "00", "04", "14", "24", "34", "44", "54", "64", "74" DW "84", "94", "00", "00", "00", "00", "00", "00", "05", "15", "25", "35" DW "45", "55", "65", "75", "85", "95", "00", "00", "00", "00", "00", "00" DW "06", "16", "26", "36", "46", "56", "66", "76", "86", "96", "00", "00" DW "00", "00", "00", "00", "07", "17", "27", "37", "47", "57", "67", "77" DW "87", "97", "00", "00", "00", "00", "00", "00", "08", "18", "28", "38" DW "48", "58", "68", "78", "88", "98", "00", "00", "00", "00", "00", "00" DW "09", "19", "29", "39", "49", "59", "69", "79", "89", "99", "00", "00" BCRESUL DT 0 EAX2AST PROC ;The routine prints ASCII MOV DWORD PTR BCRESUL, EAX ;decimal content of EAX register MOV DWORD PTR BCRESUL + 4, 0 ;by usage of coprocessor FBSTP FILD QWORD PTR BCRESUL ;instruction which converts FBSTP BCRESUL ;number into the packed BCD. LEA EDI, INTRES ;Unpacking of BCD is done via MOV ECX, 5 ;the table of unpacked values. CLD ;Author: Andrija Radovic, ©2011 EAX2AST_DO: MOVZX EAX, BYTE PTR [ECX + OFFSET BCRESUL - 1] MOV AX, WORD PTR [2 * EAX + OFFSET ASCII_TABLE] STOSW LOOPD EAX2AST_DO MOV AL, "0" MOV ECX, 10 LEA EDI, INTRES REPE SCASB DEC EDI INVOKE StdOut, EDI RET EAX2AST ENDP ;--------------------------------------------------------------------------------------------------------- BCDEX DT 0 EAX2AFL PROC ;The routine prints ASCII STD ;decimal content of EAX register MOV DWORD PTR BCDEX, EAX ;by usage of coprocessor FBSTP MOV DWORD PTR BCDEX + 4, 0 ;instruction which converts FILD QWORD PTR BCDEX ;number into the packed BCD. FBSTP BCDEX ;Unpacking of BCD is done via MOV EDX, DWORD PTR BCDEX ;SHR and SHRD instructions. MOVZX EBX, WORD PTR BCDEX + 4 ;Author: Andrija Radovic, ©2011 LEA EDI, 9 + INTRES EAX2AFL_DO: MOV EAX, EDX AND EAX, 15 OR AL, "0" STOSB SHRD EDX, EBX, 4 SHR EBX, 4 MOV EAX, EDX OR EAX, EBX JNZ EAX2AFL_DO LEA EDX, [EDI + 1] CLD INVOKE StdOut, EDX RET EAX2AFL ENDP ;--------------------------------------------------------------------------------------------------------- EAX2DEC PROC ;This routine prints ASCII LEA ECX, INTRES + 9 ;decimal content of EAX register MOV EBX, 10 ;by its repetitive dividing by EAX2DEC_DO: ;10 using DIV instruction that XOR EDX, EDX ;simultaneously yields result DIV EBX ;and remainder which denotes OR EDX, "0" ;current decimal digit. MOV BYTE PTR [ECX], DL ;Author: Andrija Radovic, ©2011 TEST EAX, EAX LOOPNZD EAX2DEC_DO LEA EDX, [ECX + 1] INVOKE StdOut, EDX RET EAX2DEC ENDP ;--------------------------------------------------------------------------------------------------------- EAX2ASC PROC ;This routine prints ASCII LEA ECX, INTRES + 9 ;decimal content of EAX register MOV EDI, 858993459 ;by its repetitive dividing by MOV EBX, EAX ;10 using MUL instruction to AX2ASC_DO: ;divide by 10 via multiplication LEA EAX, [EBX + 1] ;with the appropriate constant. MUL EDI ;Author: Andrija Radovic, ©2011 SHR EDX, 1 LEA EAX, [4 * EDX + EDX] NEG EAX LEA EAX, [EBX + 2 * EAX + "0"] MOV BYTE PTR [ECX], AL MOV EBX, EDX LOOPNZD AX2ASC_DO LEA EDX, [ECX + 1] INVOKE StdOut, EDX RET EAX2ASC ENDP ;--------------------------------------------------------------------------------------------------------- LB DB 0F0H,0F1H, 1,3, 0F2H,4, 0F3H,0F4H, 2,7, 0F5H,0F6H, 6,8, 0F7H,9, 0F8H,0F9H D DD 0,1,2,3,4,5,6,7,8,9 DD 00,10,20,30,40,50,60,70,80,90 DD 000,100,200,300,400,500,600,700,800,900 DD 0000,1000,2000,3000,4000,5000,6000,7000,8000,9000 DD 00000,10000,20000,30000,40000,50000,60000,70000,80000,90000 DD 000000,100000,200000,300000,400000,500000,600000,700000,800000,900000 DD 0000000,1000000,2000000,3000000,4000000,5000000,6000000,7000000,8000000,9000000 DD 00000000,10000000,20000000,30000000,40000000,50000000,60000000,70000000,80000000,90000000 DD 000000000,100000000,200000000,300000000,400000000,500000000,600000000,700000000,800000000 DD 900000000 DD 0000000000,1000000000,2000000000,3000000000,4000000000,4294967295,4294967295,4294967295 DD 4294967295,4294967295 DD 1,10,100,1000,10000,100000,1000000,10000000,100000000,1000000000 EAX2BTR PROC ;This routine prints ASCII CLD ;decimal content of EAX register MOV ESI, 400 ;by binary tree digits MOV EBX, EAX ;extraction. MOV EAX, 5 ;No specific instruction is used. EAX2BTR_DO1: ;Author: Andrija Radovic, ©2011 CMP EBX, DWORD PTR [4 * EAX + ESI + OFFSET D] SBB EDX, EDX MOV AL, BYTE PTR [2 * EAX + EDX + (OFFSET LB - 1)] TEST AL, AL JNS EAX2BTR_DO1 AND AX, 15 LEA EDI, 9 + INTRES SUB EDI, EAX PUSH EDI LEA ESI, [EAX + 4 * EAX] MOV EAX, 5 SHL ESI, 3 EAX2BTR_DO3: CMP EBX, DWORD PTR [4 * EAX + ESI + OFFSET D] SBB EDX, EDX MOV AL, BYTE PTR [2 * EAX + EDX + (OFFSET LB - 1)] TEST AL, AL JNS EAX2BTR_DO3 AND EAX, 15 SUB EBX, DWORD PTR [4 * EAX + ESI + OFFSET D] OR AL, "0" STOSB MOV EAX, 5 SUB ESI, 40 JNC EAX2BTR_DO3 POP EDX INVOKE StdOut, EDX RET EAX2BTR ENDP ;--------------------------------------------------------------------------------------------------------- LC DW 0FF00H,0FF01H, 1,3, 0FF02H,4, 0FF03H,0FF04H, 2,7, 0FF05H,0FF06H, 6,8, 0FF07H,9 DW 0FF08H,0FF09H DC DD 0,1,2,3,4,5,6,7,8,9 DD 00,10,20,30,40,50,60,70,80,90 DD 000,100,200,300,400,500,600,700,800,900 DD 0000,1000,2000,3000,4000,5000,6000,7000,8000,9000 DD 00000,10000,20000,30000,40000,50000,60000,70000,80000,90000 DD 000000,100000,200000,300000,400000,500000,600000,700000,800000,900000 DD 0000000,1000000,2000000,3000000,4000000,5000000,6000000,7000000,8000000,9000000 DD 00000000,10000000,20000000,30000000,40000000,50000000,60000000,70000000,80000000,90000000 DD 000000000,100000000,200000000,300000000,400000000,500000000,600000000,700000000,800000000 DD 900000000 DD 0000000000,1000000000,2000000000,3000000000,4000000000,4294967295,4294967295,4294967295 DD 4294967295,4294967295 DD 1,10,100,1000,10000,100000,1000000,10000000,100000000,1000000000 EAXCMOV PROC ;This routine prints ASCII CLD ;decimal content of EAX register MOV ESI, 400 ;by binary tree digits MOV EBX, EAX ;extraction. MOV EAX, 5 ;CMOV instruction is used. EAXCMOV_DO1: ;Author: Andrija Radovic, ©2011 CMP EBX, DWORD PTR [4 * EAX + ESI + OFFSET DC] ;CMOVC AX, WORD PTR [4 * EAX + (OFFSET LC - 4)] ;These two instructions ;CMOVNC AX, WORD PTR [4 * EAX + (OFFSET LC - 2)] ;work on some processors... CMOVC DX, WORD PTR [4 * EAX + (OFFSET LC - 4)] ;Malfunction of x86 CMOV CMOVNC DX, WORD PTR [4 * EAX + (OFFSET LC - 2)] ;requires these ones instead MOV AX, DX ;of above two instructions. TEST AX, AX JNS EAXCMOV_DO1 MOVZX EAX, AL LEA EDI, 9 + INTRES SUB EDI, EAX PUSH EDI LEA ESI, [EAX + 4 * EAX] MOV EAX, 5 SHL ESI, 3 EAXCMOV_DO3: CMP EBX, DWORD PTR [4 * EAX + ESI + OFFSET DC] ;CMOVC AX, WORD PTR [4 * EAX + (OFFSET LC - 4)] ;These two instructions ;CMOVNC AX, WORD PTR [4 * EAX + (OFFSET LC - 2)] ;work on some processors... CMOVC DX, WORD PTR [4 * EAX + (OFFSET LC - 4)] ;Malfunction of x86 CMOV CMOVNC DX, WORD PTR [4 * EAX + (OFFSET LC - 2)] ;requires these ones instead MOV AX, DX ;of above two instructions. TEST AX, AX JNS EAXCMOV_DO3 MOVZX EAX, AL SUB EBX, DWORD PTR [4 * EAX + ESI + OFFSET DC] OR AL, "0" STOSB MOV EAX, 5 SUB ESI, 40 JNC EAXCMOV_DO3 POP EDX INVOKE StdOut, EDX RET EAXCMOV ENDP ;--------------------------------------------------------------------------------------------------------- NumFormat DB "%u",0 BufferW DB 32 DUP(0) EAX2WIN PROC ;This routine prints ASCII EAX. INVOKE wsprintf, ADDR BufferW, ADDR NumFormat, EAX ;It utilizes native Windows NT INVOKE StdOut, ADDR BufferW ;subroutine. RET EAX2WIN ENDP ;--------------------------------------------------------------------------------------------------------- EAX_SQR PROC ;EAX = SQR(EAX), square rooting XOR ESI, ESI ;routine. XOR EDX, EDX ;EDX is remainder. MOV EBX, 1073741824 ;Author: Andrija Radovic, ©2011 SQRT_DO: LEA EDI, [EBX + ESI] ADD EDI, EDX SHR EDX, 1 CMP EAX, EDI JC SQRT_END_IF MOV ESI, EDI ADD EDX, EBX SQRT_END_IF: SHR EBX, 2 JNZ SQRT_DO SUB EAX, ESI XCHG EAX, EDX RET EAX_SQR ENDP ;--------------------------------------------------------------------------------------------------------- END ASCII
The Command Prompt windows of the program:
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