please write the remaining code( do not use push and pop)

please use MSP430 Assembler Code Template in TI Code Composer Studio

;------------------------------------------------------------------------------- ; MSP430 Assembler Code Template for use with TI Code Composer Studio ; ; ;------------------------------------------------------------------------------- .cdecls C,LIST,"msp430.h" ; Include device header file ;------------------------------------------------------------------------------- .def RESET ; Export program entry-point to ; make it known to linker. ;------------------------------------------------------------------------------- .text ; Assemble into program memory. .retain ; Override ELF conditional linking ; and retain current section. .retainrefs ; And retain any sections that have ; references to current section.

;------------------------------------------------------------------------------- RESET mov.w #__STACK_END,SP ; Initialize stackpointer StopWDT mov.w #WDTPW|WDTHOLD,&WDTCTL ; Stop watchdog timer

;------------------------------------------------------------------------------- ; Main loop here ;-------------------------------------------------------------------------------

Lab3 mov.w #5, R4 ;set up the initial a value in R4 clr.w R5 clr.w R6 clr.w R7 clr.w R8

Xcalc mov.w R4, R5 ;copy the a value into R5 call #ABSOL ;computer the absolute value of a in R5

Summation mov.w R5, R6 ;starting the upper limit with value a of the summation in R6 call #FACTO ;get the factorial value of R6 and save in R6 ;finish Xcalcby dobling the value and adding it to accumulator R8, ;repeat the loop with a-1, a-2 (in R5) till lower value a=0 ;save the Xcalc results in R5

Fcalc mov.w R5, R7 ;start F calculation ;finish Fcalc by adding the constant 50 and dividing by 4 (hint shift twice to the right with carry=0)

loop jmp loop ;loop in place

;Absolute subroutine take a value form R5 and converts it to its absolute value ABSOL: tst R5 jn twoscompl ret twoscompl inv R5 inc R5 ABSOLend ret

;Factorial subroutine takes number n form R6 and compute/save n! in R6 ;You need to replace the NOP with your actual n! calculation as given in class ;You must push/pop all registers FACTO: ;write the factorial subroutine ;you start with value n in R6, then multiply with n-1, n-2, ..1 ;use the MULT subroutine to multiply R5 to R6 registers FACTOend ret

;The multiplier subroutine based on shift and add ;It takes R5 as the multiplier and R6 as the multiplicand ;to avoid multiplication overflow, both R5 and R6 should be limited to one byte and thus ANDed with 0X00FF. ;but due to factorial calculation, we will not mask R6 to let it grow beyond 255 MULT: push.w R5; push.w R7; push.w R8; mov.w #8, R8 ;8 bit multiplication, so we loop 8 times clr.w R7 ;additive accumulator should start with zero and.w #0x00FF, R5 ;clear upper 8 bits of multiplier ;and.w #0x00FF, R6 ;clear upper 8 bits of multiplicand

nextbit rrc.w R5 ;shift multiplier bits one at a time to the carry jnc twice ;if no carry skip the add addmore add.w R6, R7 ;add a copy of the multiplicand to the accumulator twice add.w R6, R6 ;multiplicand times 2, (shifted 1 bit left) dec.w R8 ;dec loop counter jnz nextbit ;jump to check next bit of the multiplier mov.w R7, R6 ;save the result in R6

pop.w R8; pop.w R7; pop.w R5;

MULTend ret

;------------------------------------------------------------------------------- ; Stack Pointer definition ;------------------------------------------------------------------------------- .global __STACK_END .sect .stack ;------------------------------------------------------------------------------- ; Interrupt Vectors ;------------------------------------------------------------------------------- .sect ".reset" ; MSP430 RESET Vector .short RESET