I am writing in assembly, technically HLA(High Level Assembly) and am having tro

Question

I am writing in assembly, technically HLA(High Level Assembly) and am having trouble with an assignment. Here is the assignment:

Below are some sample program dialogues that demonstrate these ideas.
(Hint: Do this in small steps, bit-by-bit. There's alot to it... )
(Further Hint: The most important part of this assignment is to worked with the packed data field entered by the user to extract the sub-parts out of it. The overlapping design of the Intel registers helps you parse this kind of data field and you can shift the bits around to get the right part into BH or BL, for example... )
(Further Hint: You can read hex numbers by reading directly into a register.)
(Final Hint: Since we haven't learned how to do multiplication yet, although it's kinda painful, I was expecting that you would perform the multiplication by a looping set of addition instructions)

Feed me(2 hex digits with the bits prsseeee): CC
Fall Semester
12 units
CA Resident
Parking
Total Fees = $ 688

Feed me(2 hex digits with the bits prsseeee): 4C
Fall Semester
12 units
CA Resident
No Parking
Total Fees = $ 603

Feed me(2 hex digits with the bits prsseeee): 8C
Fall Semester
12 units
Non-Resident
Parking
Total Fees = $ 4576

Feed me(2 hex digits with the bits prsseeee): 0C
Fall Semester
12 units
Non-Resident
No Parking
Total Fees = $ 4491

Feed me(2 hex digits with the bits prsseeee): D1
Winter Semester
1 unit
CA Resident
Parking
Total Fees = $ 139

Feed me(2 hex digits with the bits prsseeee): 91
Winter Semester
1 unit
Non-Resident
Parking
Total Fees = $ 463

Here is my code:

program SMCFee;

#include( "stdlib.hhf" );

static

iTotal: int32 := 0;

I: int8 := 0;

begin SMCFee;

stdout.put( "Feed me(2 hex digits with the bits prsseeee):" ); //Get info from user

stdin.get( BL ); //Store in the BL reg

mov( iTotal, EBX ); //Move the var iTotal to the EBX reg

mov( BL, AL ); //Move the contents of the BL reg to the AL reg

shr( 4, AL ); //Shift right 4 the contents of AL reg

and( %0000_0011, AL ); //Using AND to force the lower bits of AL to 0 and isolate bits 0 and 1

cmp( AL, %0000_0000 ); //Compare AL to 0

je Fall; //If equal jump to Fall

cmp( AL, %0000_0010 ); //Compare AL to 10

je Spring; //If equal jump to Spring

cmp( AL, %0000_0001 ); //Compare AL to 1

je Winter; //If equal jump to Winter

cmp( AL, %0000_0011 ); //Compare AL to 11

je Summer; //If equal jump to Summer

Fall:

stdout.put( "Fall Semester", nl );

//Determine # of credits

mov( BL, AL ); //Move original contents of BL to AL thereby overwriting AL

and( %0000_1111, AL ); //Using AND to force the lower bits of AL to 0 and isolate bits 0 through 3

mov( AL, CH ); //Move AL (credits) to CH

stdout.puti8( CH ); //Print to number of units in decimal format

stdout.put( " units", nl);

  

//Determine CA Residency Status

mov( BL, AL ); //Move original contents of BL to AL thereby overwriting AL

shr( 6, AL ); //Shift right 6 the contents of AL reg

and( %0000_0001, AL ); //Using AND to force the lower bits of AL to 0 and isolate bit 0

cmp( AL, 1 ); //Compare AL to 1

je CARes; //If equal jump to CA Res

jne NonRes; //If not equal jump to Non Res

Spring:

stdout.put( "Spring Semester", nl );

//Determine # of credits

mov( BL, AL ); //Move original contents of BL to AL thereby overwriting AL

and( %0000_1111, AL ); //Using AND to force the lower bits of AL to 0 and isolate bits 0 through 3

mov( AL, CH ); //Move AL (credits) to CH

stdout.puti8( CH ); //Print to number of units in decimal format

stdout.put( " units", nl);

  

//Determine CA Residency Status

mov( BL, AL ); //Move original contents of BL to AL thereby overwriting AL

shr( 6, AL ); //Shift right 6 the contents of AL reg

and( %0000_0001, AL ); //Using AND to force the lower bits of AL to 0 and isolate bit 0

cmp( AL, 1 ); //Compare AL to 1

je CARes; //If equal jump to CA Res

jne NonRes; //If not equal jump to Non Res

Winter:

stdout.put( "Winter Semester", nl );

//Determine # of credits

mov( BL, AL ); //Move original contents of BL to AL thereby overwriting AL

and( %0000_1111, AL ); //Using AND to force the lower bits of AL to 0 and isolate bits 0 through 3

mov( AL, CH ); //Move AL (credits) to CH

stdout.puti8( CH ); //Print to number of units in decimal format

stdout.put( " units", nl);

  

//Determine CA Residency Status

mov( BL, AL ); //Move original contents of BL to AL thereby overwriting AL

shr( 6, AL ); //Shift right 6 the contents of AL reg

and( %0000_0001, AL ); //Using AND to force the lower bits of AL to 0 and isolate bit 0

cmp( AL, 1 ); //Compare AL to 1

je CARes; //If equal jump to CA Res

jne NonRes; //If not equal jump to Non Res

Summer:

stdout.put( "Summer Semester", nl );

//Determine # of credits

mov( BL, AL ); //Move original contents of BL to AL thereby overwriting AL

and( %0000_1111, AL ); //Using AND to force the lower bits of AL to 0 and isolate bits 0 through 3

mov( AL, CH ); //Move AL (credits) to CH

stdout.puti8( CH ); //Print to number of units in decimal format

stdout.put( " units", nl);

  

//Determine CA Residency Status

mov( BL, AL ); //Move original contents of BL to AL thereby overwriting AL

shr( 6, AL ); //Shift right 6 the contents of AL reg

and( %0000_0001, AL ); //Using AND to force the lower bits of AL to 0 and isolate bit 0

cmp( AL, 1 ); //Compare AL to 1

je CARes; //If equal jump to CA Res

jne NonRes; //If not equal jump to Non Res

CARes:

stdout.put( "CA Resident", nl );

jmp CAResFees; //Jump to CA Res Fees

  

NonRes:

stdout.put( "Non-Resident", nl );

jmp NonResFees; //Jump to Non Res Fees

CAResFees:

mov( 46, ECX ); //Move $46 to ECX reg

add( ECX, EBX ); //Add $46 to total (EBX)

CAForLp: //Begin For Loop

InitializeCAForLp: //I = 0

mov( 0, I );

CAForLpTerminationTest: //Is I >= number of units (CH)? Then terminate

cmp( I, CH );

jnl CAForLpDone;

CAForLpBody:

add( ECX, EBX ); //Add $46 to total (EBX)

CAForLpIncrement:

inc( I );

jmp CAForLpTerminationTest;

CAForLpDone:

jmp Parking; //Jump to Parking

NonResFees:

mov( 370, ECX ); //Move $370 to ECX reg

add( ECX, EBX ); //Add $370 to total (EBX)

ForLp: //Begin For Loop

InitializeForLp: //I = 0

mov( 0, I );

ForLpTerminationTest: //Is I >= number of units (CH)? Then terminate

cmp( I, CH );

jnl ForLpDone;

ForLpBody:

add( ECX, EBX ); //Add $370 to total (EBX)

ForLpIncrement:

inc( I );

jmp ForLpTerminationTest;

ForLpDone:

jmp Parking; //Jump to Parking  

Parking:

mov( BL, AL ); //Move the contents of the BL reg to the AL reg

shr( 4, AL ); //Shift right 4 the contents of AL reg

and( %0000_0011, AL ); //Using AND to force the lower bits of AL to 0 and isolate bits 0 and 1

cmp( AL, 0 ); //Compare AL to 0

je FallSpringParking; //If equal jump to Fall Spring Parking

cmp( AL, 10 ); //Compare AL to 10

je FallSpringParking; //If equal jump to Fall Spring Parking

cmp( AL, 1 ); //Compare AL to 1

je WinterSummerParking; //If equal jump to Winter SummerParking

cmp( AL, 11 ); //Compare AL to 11

je WinterSummerParking; //If equal jump to Winter Summer Parking

FallSpringParking:

mov( BL, AL ); //Move original contents of BL to AL thereby overwriting AL

shr( 7, AL ); //Shift right 7 the contents of AL reg

and( %0000_0001, AL ); //Using AND to force the lower bits of AL to 0 and isolate bit 0

cmp( AL, 1 ); //Compare AL to 1

je FSYesParking; //If equal jump to YesParking

jne FSNoParking; //If not equal jump to NoParking

WinterSummerParking:

mov( BL, AL ); //Move original contents of BL to AL thereby overwriting AL

shr( 7, AL ); //Shift right 7 the contents of AL reg

and( %0000_0001, AL ); //Using AND to force the lower bits of AL to 0 and isolate bit 0

cmp( AL, 1 ); //Compare AL to 1

je WSYesParking; //If equal jump to YesParking

jne WSNoParking; //If not equal jump to NoParking

FSYesParking:

stdout.put( "Parking", nl );

mov( 85, EDX ); //Move $85 to EDX

jmp TotalFees; //Jump to Total fees

FSNoParking:

stdout.put( "No Parking", nl );

mov( 0, EDX ); //Move $0 to EDX

jmp TotalFees; //Jump to Total fees

WSYesParking:

stdout.put( "Parking", nl );

mov( 45, EDX ); //Move $45 to EDX

jmp TotalFees; //Jump to Total fees

WSNoParking:

stdout.put( "No Parking", nl );

mov( 45, EDX ); //Move $45 to EDX

jmp TotalFees; //Jump to Total fees

StudentServices:

mov( BL, AL ); //Move the contents of the BL reg to the AL reg

shr( 4, AL ); //Shift right 4 the contents of AL reg

and( %0000_0011, AL ); //Using AND to force the lower bits of AL to 0 and isolate bits 0 and 1

cmp( AL, 0 ); //Compare AL to 0

je FallSpringSS; //If equal jump to Fall Spring Student Services

cmp( AL, 10 ); //Compare AL to 10

je FallSpringSS; //If equal jump to Fall Spring Student Services

cmp( AL, 1 ); //Compare AL to 1

je WinterSummerSS; //If equal jump to Winter Summer Student Services

cmp( AL, 11 ); //Compare AL to 11

je WinterSummerSS; //If equal jump to Winter Summer Student Services

FallSpringSS:

add ( 51, EBX ); //Add $51 to total (EBX)

jmp TotalFees; //Jump to Total Fees

WinterSummerSS:

add ( 48, EBX ); //Add $48 to total (EBX)

jmp TotalFees; //Jump to Total Fees

TotalFees:

stdout.put( "Total Fees = ");

stdout.puti32( EBX );

end SMCFee;

I must be having some logic issues because my code compiles but regardless of the hex number entered I get the same result Fall Semester, 0 units, Non-Resident, Parking, and $740 in fees. I'm guessing the problem is with my labels but I'm not sure. Any guidance would be helpful.

Semester Enrolled Units CA Resident? Parking Decal?

Explanation / Answer

#include( "stdlib.hhf" ); static totalfee : int32 := 0; begin Fee; stdout.put("Enter number(2 hex digits with the bits prsseeee):"); stdin.get(BL); mov(totalfee,ECX); mov(BL,AL); shr(4,AL); and( %0000_0011, AL ); cmp(AL, 00); je Fall; cmp(AL, 10); je Spring; jmp Win; Fall: stdout.put("Fall Semester", nl); mov(BL,AL); shr(7,AL); and( %0000_0001, AL ); cmp(AL,1); je SprFallPark; add(51, EAX); jmp ResCheck; Spring: stdout.put("Spring Semester", nl); mov(BL,AL); shr(7,AL); and( %0000_0001, AL ); cmp(AL,1); je SprFallPark; stdout.put("No parking", nl); add(51, EAX); jmp ResCheck; SprFallPark: stdout.put("Parking", nl); add(136, EAX); jmp ResCheck; Win: cmp(AL, 11); je Summer; stdout.put("Winter Semester", nl); mov(BL,AL); shr(7,AL); and( %0000_0001, AL ); cmp(AL,1); je WinSumPark; stdout.put("No Parking", nl); add(51, EAX); jmp ResCheck; Summer: stdout.put("Summer Semester", nl); mov(BL,AL); shr(7,AL); and( %0000_0001, AL ); cmp(AL,1); je WinSumPark; stdout.put("No parking"); add(51, EAX); jmp ResCheck; WinSumPark: stdout.put("Parking", nl); add(133, EAX); jmp ResCheck; ResCheck: mov(BL,AL); shr(6,AL); and( %0000_0001, AL ); cmp(AL,1); je Res; stdout.put("Non-Resident", nl); mov(335,EDX); jmp CalcUnits; Res: stdout.put("CA Resident", nl); mov(46,EDX); jmp CalcUnits; CalcUnits: ForLp: mov(BL, AL); and(%0000_1111, AL); stdout.puti8(AL); stdout.put(" units", nl); ForLpTerminationTest: cmp(AL, 0); jle ForLpDone; ForLpBody: add(EDX, EAX); ForLpDecrement: dec(AL); jmp ForLpTerminationTest; ForLpDone: stdout.put("Total Fees = $"); stdout.puti32(ECX); end Fee;

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