Question

- sparc assembly -

*Write a program that takes four 32-bit integers (A,B,C,D) in hexadecimal form and calculates A*B + C*D.

(Assumption: User input is 32-bit 0 or positive. The result is expressed in 64 bits.)

[result example]

bash $ assm

Hex value? ffffffff

Hex value? 8

Hex value? ffffffff

Hex value? 8

Result is 0000000f fffffff0

Answer 1

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PROGRAM

.LC0:

        .ascii  "\012Result is :  \000"

.LC1:

        .ascii  " \000"

dectohex(long long):

        daddiu  $sp,$sp,-1088

        sd      $31,1080($sp)

        sd      $fp,1072($sp)

        sd      $28,1064($sp)

        move    $fp,$sp

        lui     $28,%hi(%neg(%gp_rel(dectohex(long long))))

        daddu   $28,$28,$25

        daddiu  $28,$28,%lo(%neg(%gp_rel(dectohex(long long))))

        sd      $4,1040($fp)

        sd      $0,0($fp)

.L7:

        ld      $2,1040($fp)

        beq     $2,$0,.L2

        nop

        sw      $0,24($fp)

        ld      $3,1040($fp)

        li      $2,-1                 # 0xffffffffffffffff

        dsll    $2,$2,63

        ori     $2,$2,0xf

        and     $2,$3,$2

        bgez    $2,.L3

        nop

        daddiu  $2,$2,-1

        li      $3,-16                  # 0xfffffffffffffff0

        or      $2,$2,$3

        daddiu  $2,$2,1

.L3:

        sw      $2,24($fp)

        lw      $2,24($fp)

        slt     $2,$2,10

        beq     $2,$0,.L4

        nop

        lw      $2,24($fp)

        andi    $2,$2,0x00ff

        addiu   $2,$2,48

        andi    $2,$2,0x00ff

        seb     $3,$2

        ld      $2,0($fp)

        daddu   $2,$fp,$2

        sb      $3,32($2)

        ld      $2,0($fp)

        daddiu  $2,$2,1

        sd      $2,0($fp)

        b       .L5

        nop

.L4:

        lw      $2,24($fp)

        andi    $2,$2,0x00ff

        addiu   $2,$2,55

        andi    $2,$2,0x00ff

        seb     $3,$2

        ld      $2,0($fp)

        daddu   $2,$fp,$2

        sb      $3,32($2)

        ld      $2,0($fp)

        daddiu  $2,$2,1

        sd      $2,0($fp)

.L5:

        ld      $2,1040($fp)

        bgez    $2,.L6

        nop

        daddiu  $2,$2,15

.L6:

        dsra    $2,$2,4

        sd      $2,1040($fp)

        b       .L7

        nop

.L2:

        ld      $2,%got_page(.LC0)($28)

        daddiu  $5,$2,%got_ofst(.LC0)

        ld      $4,%got_disp(_ZSt4cout)($28)

        ld      $2,%call16(_ZStlsISt11char_traitsIcEERSt13basic_ostreamIcT_ES5_PKc)($28)

        move    $25,$2

        nop

        lw      $2,4($fp)

        li      $3,16                 # 0x10

        subu    $2,$3,$2

        sw      $2,8($fp)

.L9:

        lw      $2,8($fp)

        blez    $2,.L8

        nop

        move    $5,$0

        ld      $4,%got_disp(_ZSt4cout)($28)

        ld      $2,%call16(_ZNSolsEi)($28)

        move    $25,$2

        nop

        lw      $2,8($fp)

        addiu   $2,$2,-1

        sw      $2,8($fp)

        b       .L9

        nop

.L8:

        ld      $2,0($fp)

        daddiu  $2,$2,-1

        sd      $2,16($fp)

.L12:

        ld      $2,16($fp)

        bltz    $2,.L13

        nop

        ld      $2,16($fp)

        daddu   $2,$fp,$2

        lb      $2,32($2)

        move    $5,$2

        ld      $4,%got_disp(_ZSt4cout)($28)

        ld      $2,%call16(_ZStlsISt11char_traitsIcEERSt13basic_ostreamIcT_ES5_c)($28)

        move    $25,$2

        nop

        ld      $2,0($fp)

        daddiu  $3,$2,-1

        ld      $2,16($fp)

        bne     $3,$2,.L11

        nop

        ld      $2,%got_page(.LC1)($28)

        daddiu  $5,$2,%got_ofst(.LC1)

        ld      $4,%got_disp(_ZSt4cout)($28)

        ld      $2,%call16(_ZStlsISt11char_traitsIcEERSt13basic_ostreamIcT_ES5_PKc)($28)

        move    $25,$2

        nop

.L11:

        ld      $2,16($fp)

        daddiu  $2,$2,-1

        sd      $2,16($fp)

        b       .L12

        nop

.L13:

        nop

        move    $sp,$fp

        ld      $31,1080($sp)

        ld      $fp,1072($sp)

        ld      $28,1064($sp)

        daddiu  $sp,$sp,1088

        j       $31

        nop

hextodec(std::__cxx11::basic_string<char, std::char_traits<char>, std::allocator<char> >):

        daddiu  $sp,$sp,-80

        sd      $31,72($sp)

        sd      $fp,64($sp)

        sd      $28,56($sp)

        move    $fp,$sp

        lui     $28,%hi(%neg(%gp_rel(hextodec(std::__cxx11::basic_string<char, std::char_traits<char>, std::allocator<char> >))))

        daddu   $28,$28,$25

        daddiu  $28,$28,%lo(%neg(%gp_rel(hextodec(std::__cxx11::basic_string<char, std::char_traits<char>, std::allocator<char> >))))

        sd      $4,32($fp)

        ld      $4,32($fp)

        ld      $2,%call16(_ZNKSt7__cxx1112basic_stringIcSt11char_traitsIcESaIcEE6lengthEv)($28)

        move    $25,$2

        nop

        sd      $2,24($fp)

        li      $2,1                        # 0x1

        sd      $2,0($fp)

        sd      $0,8($fp)

        lw      $2,28($fp)

        addiu   $2,$2,-1

        sw      $2,16($fp)

.L22:

        lw      $2,16($fp)

        bltz    $2,.L15

        nop

        lw      $2,16($fp)

        move    $5,$2

        ld      $4,32($fp)

        ld      $2,%call16(_ZNSt7__cxx1112basic_stringIcSt11char_traitsIcESaIcEEixEm)($28)

        move    $25,$2

        nop

        lb      $2,0($2)

        slt     $2,$2,48

        bne     $2,$0,.L16

        nop

        lw      $2,16($fp)

        move    $5,$2

        ld      $4,32($fp)

        ld      $2,%call16(_ZNSt7__cxx1112basic_stringIcSt11char_traitsIcESaIcEEixEm)($28)

        move    $25,$2

        nop

        lb      $2,0($2)

        slt     $2,$2,58

        beq     $2,$0,.L16

        nop

        li      $2,1                        # 0x1

        b       .L17

        nop

.L16:

        move    $2,$0

.L17:

        beq     $2,$0,.L18

        nop

        lw      $2,16($fp)

        move    $5,$2

        ld      $4,32($fp)

        ld      $2,%call16(_ZNSt7__cxx1112basic_stringIcSt11char_traitsIcESaIcEEixEm)($28)

        move    $25,$2

        nop

        lb      $2,0($2)

        addiu   $2,$2,-48

        move    $3,$2

        ld      $2,0($fp)

        dmult   $3,$2

        ld      $2,8($fp)

        mflo    $3

        daddu   $2,$2,$3

        sd      $2,8($fp)

        ld      $2,0($fp)

        dsll    $2,$2,4

        sd      $2,0($fp)

        b       .L19

        nop

.L18:

        lw      $2,16($fp)

        move    $5,$2

        ld      $4,32($fp)

        ld      $2,%call16(_ZNSt7__cxx1112basic_stringIcSt11char_traitsIcESaIcEEixEm)($28)

        move    $25,$2

        nop

        lb      $2,0($2)

        slt     $2,$2,65

        bne     $2,$0,.L20

        nop

        lw      $2,16($fp)

        move    $5,$2

        ld      $4,32($fp)

        ld      $2,%call16(_ZNSt7__cxx1112basic_stringIcSt11char_traitsIcESaIcEEixEm)($28)

        move    $25,$2

        nop

        lb      $2,0($2)

        slt     $2,$2,71

        beq     $2,$0,.L20

        nop

        li      $2,1                        # 0x1

        b       .L21

        nop

.L20:

        move    $2,$0

.L21:

        beq     $2,$0,.L19

        nop

        lw      $2,16($fp)

        move    $5,$2

        ld      $4,32($fp)

        ld      $2,%call16(_ZNSt7__cxx1112basic_stringIcSt11char_traitsIcESaIcEEixEm)($28)

        move    $25,$2

        nop

        lb      $2,0($2)

        addiu   $2,$2,-55

        move    $3,$2

        ld      $2,0($fp)

        dmult   $3,$2

        ld      $2,8($fp)

        mflo    $3

        daddu   $2,$2,$3

        sd      $2,8($fp)

        ld      $2,0($fp)

        dsll    $2,$2,4

        sd      $2,0($fp)

.L19:

        lw      $2,16($fp)

        addiu   $2,$2,-1

        sw      $2,16($fp)

        b       .L22

        nop

.L15:

        ld      $2,8($fp)

        move    $sp,$fp

        ld      $31,72($sp)

        ld      $fp,64($sp)

        ld      $28,56($sp)

        daddiu  $sp,$sp,80

        j       $31

        nop

.LC2:

        .ascii  "Hex value ? \000"

main:

        daddiu  $sp,$sp,-256

        sd      $31,248($sp)

        sd      $fp,240($sp)

        sd      $28,232($sp)

        sd      $18,224($sp)

        sd      $17,216($sp)

        sd      $16,208($sp)

        move    $fp,$sp

        lui     $28,%hi(%neg(%gp_rel(main)))

        daddu   $28,$28,$25

        daddiu  $28,$28,%lo(%neg(%gp_rel(main)))

        daddiu  $17,$fp,48

        li      $16,3                 # 0x3

        move    $18,$17

.L26:

        li      $2,-1                 # 0xffffffffffffffff

        beq     $16,$2,.L25

        nop

        move    $4,$18

        ld      $2,%call16(_ZNSt7__cxx1112basic_stringIcSt11char_traitsIcESaIcEEC1Ev)($28)

        move    $25,$2

        nop

        daddiu  $18,$18,32

        daddiu  $16,$16,-1

        b       .L26

        nop

.L25:

        sw      $0,0($fp)

.L28:

        lw      $2,0($fp)

        slt     $2,$2,4

        beq     $2,$0,.L27

        nop

        ld      $2,%got_page(.LC2)($28)

        daddiu  $5,$2,%got_ofst(.LC2)

        ld      $4,%got_disp(_ZSt4cout)($28)

        ld      $2,%call16(_ZStlsISt11char_traitsIcEERSt13basic_ostreamIcT_ES5_PKc)($28)

        move    $25,$2

        nop

        daddiu  $3,$fp,48

        lw      $2,0($fp)

        dsll    $2,$2,5

        daddu   $2,$3,$2

        move    $5,$2

        ld      $4,%got_disp(_ZSt3cin)($28)

        ld      $2,%call16(_ZStrsIcSt11char_traitsIcESaIcEERSt13basic_istreamIT_T0_ES7_RNSt7__cxx1112basic_stringIS4_S5_T1_EE)($28)

        move    $25,$2

        nop

        daddiu  $3,$fp,48

        lw      $2,0($fp)

        dsll    $2,$2,5

        daddu   $3,$3,$2

        daddiu  $2,$fp,16

        move    $5,$3

        move    $4,$2

        ld      $2,%call16(_ZNSt7__cxx1112basic_stringIcSt11char_traitsIcESaIcEEC1ERKS4_)($28)

        move    $25,$2

        nop

        daddiu  $2,$fp,16

        move    $4,$2

        ld      $2,%got_disp(hextodec(std::__cxx11::basic_string<char, std::char_traits<char>, std::allocator<char> >))($28)

        move    $25,$2

        nop

        move    $3,$2

        lw      $2,0($fp)

        dsll    $2,$2,3

        daddu   $2,$fp,$2

        sd      $3,176($2)

        daddiu  $2,$fp,16

        move    $4,$2

        ld      $2,%call16(_ZNSt7__cxx1112basic_stringIcSt11char_traitsIcESaIcEED1Ev)($28)

        move    $25,$2

        nop

        lw      $2,0($fp)

        addiu   $2,$2,1

        sw      $2,0($fp)

        b       .L28

        nop

.L27:

        ld      $3,176($fp)

        ld      $2,184($fp)

        dmult   $3,$2

        mflo    $2

        ld      $4,192($fp)

        ld      $3,200($fp)

        dmult   $4,$3

        mflo    $3

        daddu   $2,$2,$3

        sd      $2,8($fp)

        ld      $4,8($fp)

        ld      $2,%got_disp(dectohex(long long))($28)

        move    $25,$2

        nop

        move    $17,$0

        daddiu  $16,$fp,48

        daddiu  $16,$16,128

.L30:

        daddiu  $2,$fp,48

        beq     $16,$2,.L31

        nop

        daddiu  $16,$16,-32

        move    $4,$16

        ld      $2,%call16(_ZNSt7__cxx1112basic_stringIcSt11char_traitsIcESaIcEED1Ev)($28)

        move    $25,$2

        nop

        b       .L30

        nop

.L31:

        move    $2,$17

        b       .L42

        nop

        move    $18,$4

        beq     $17,$0,.L33

        nop

        li      $2,3                        # 0x3

        dsubu   $2,$2,$16

        dsll    $2,$2,5

        daddu   $16,$17,$2

.L34:

        beq     $16,$17,.L33

        nop

        daddiu  $16,$16,-32

        move    $4,$16

        ld      $2,%call16(_ZNSt7__cxx1112basic_stringIcSt11char_traitsIcESaIcEED1Ev)($28)

        move    $25,$2

        nop

        b       .L34

        nop

.L33:

        move    $2,$18

        move    $4,$2

        ld      $2,%call16(_Unwind_Resume)($28)

        move    $25,$2

        nop

        move    $16,$4

        daddiu  $2,$fp,16

        move    $4,$2

        ld      $2,%call16(_ZNSt7__cxx1112basic_stringIcSt11char_traitsIcESaIcEED1Ev)($28)

        move    $25,$2

        nop

        move    $17,$16

        b       .L36

        nop

        move    $17,$4

.L36:

        daddiu  $16,$fp,48

        daddiu  $16,$16,128

.L38:

        daddiu  $2,$fp,48

        beq     $16,$2,.L37

        nop

        daddiu  $16,$16,-32

        move    $4,$16

        ld      $2,%call16(_ZNSt7__cxx1112basic_stringIcSt11char_traitsIcESaIcEED1Ev)($28)

        move    $25,$2

        nop

        b       .L38

        nop

.L37:

        move    $2,$17

        move    $4,$2

        ld      $2,%call16(_Unwind_Resume)($28)

        move    $25,$2

        nop

.L42:

        move    $sp,$fp

        ld      $31,248($sp)

        ld      $fp,240($sp)

        ld      $28,232($sp)

        ld      $18,224($sp)

        ld      $17,216($sp)

        ld      $16,208($sp)

        daddiu  $sp,$sp,256

        j       $31

        nop

__static_initialization_and_destruction_0(int, int):

        daddiu  $sp,$sp,-48

        sd      $31,40($sp)

        sd      $fp,32($sp)

        sd      $28,24($sp)

        move    $fp,$sp

        lui     $28,%hi(%neg(%gp_rel(__static_initialization_and_destruction_0(int, int))))

        daddu   $28,$28,$25

        daddiu  $28,$28,%lo(%neg(%gp_rel(__static_initialization_and_destruction_0(int, int))))

        move    $3,$4

        move    $2,$5

        sll     $3,$3,0

        sw      $3,0($fp)

        sll     $2,$2,0

        sw      $2,4($fp)

        lw      $3,0($fp)

        li      $2,1                        # 0x1

        bne     $3,$2,.L45

        nop

        lw      $3,4($fp)

        li      $2,65535                    # 0xffff

        bne     $3,$2,.L45

        nop

        ld      $2,%got_page(_ZStL8__ioinit)($28)

        daddiu  $4,$2,%got_ofst(_ZStL8__ioinit)

        ld      $2,%call16(_ZNSt8ios_base4InitC1Ev)($28)

        move    $25,$2

        nop

        ld      $6,%got_disp(__dso_handle)($28)

        ld      $2,%got_page(_ZStL8__ioinit)($28)

        daddiu  $5,$2,%got_ofst(_ZStL8__ioinit)

        ld      $4,%got_disp(_ZNSt8ios_base4InitD1Ev)($28)

        ld      $2,%call16(__cxa_atexit)($28)

        move    $25,$2

        nop

.L45:

        nop

        move    $sp,$fp

        ld      $31,40($sp)

        ld      $fp,32($sp)

        ld      $28,24($sp)

        daddiu  $sp,$sp,48

        j       $31

        nop

_GLOBAL__sub_I_dectohex(long long):

        daddiu  $sp,$sp,-32

        sd      $31,24($sp)

        sd      $fp,16($sp)

        sd      $28,8($sp)

        move    $fp,$sp

        lui     $28,%hi(%neg(%gp_rel(_GLOBAL__sub_I_dectohex(long long))))

        daddu   $28,$28,$25

        daddiu  $28,$28,%lo(%neg(%gp_rel(_GLOBAL__sub_I_dectohex(long long))))

        li      $5,65535                    # 0xffff

        li      $4,1                        # 0x1

        ld      $2,%got_page(__static_initialization_and_destruction_0(int, int))($28)

        daddiu  $2,$2,%got_ofst(__static_initialization_and_destruction_0(int, int))

        move    $25,$2

        nop

        move    $sp,$fp

        ld      $31,24($sp)

        ld      $fp,16($sp)

        ld      $28,8($sp)

        daddiu  $sp,$sp,32

        j       $31

        nop

IMAGE OF OUTPUT