Question

int main()
{
float A[4] = { 0.51, 1.23, 7.4, 10.88};
float B[4] = { -11.1, 78.044, 12.009, -9.99};
float s = 0.0;

for (int i=0; i<4; i++)
{
s = s + A[i]*B[i];
}
}

change this c languange to arm assembly languange extension of vfp registor

Answer 1

here is the ARM gcc compliation

LC0:

        .word   1057132380

        .word   1067282596

        .word   1089260749

        .word   1093538939

.LC1:

        .word   3241253274

        .word   1117525639

        .word   1094722781

        .word   3240089354

main:

        push    {fp, lr}

        add     fp, sp, #4

        sub     sp, sp, #40

        ldr     r3, .L5

        sub     ip, fp, #28

        ldm     r3, {r0, r1, r2, r3}

        stm     ip, {r0, r1, r2, r3}

        ldr     r3, .L5+4

        sub     ip, fp, #44

        ldm     r3, {r0, r1, r2, r3}

        stm     ip, {r0, r1, r2, r3}

        mov     r3, #0

        str     r3, [fp, #-8]     @ float

        mov     r3, #0

        str     r3, [fp, #-12]

        b       .L2

.L3:

        ldr     r3, [fp, #-12]

        lsl     r3, r3, #2

        sub     r2, fp, #4

        add     r3, r2, r3

        ldr     r2, [r3, #-24]    @ float

        ldr     r3, [fp, #-12]

        lsl     r3, r3, #2

        sub     r1, fp, #4

        add     r3, r1, r3

        ldr     r3, [r3, #-40]    @ float

        mov     r1, r3

        mov     r0, r2

        bl      __aeabi_fmul

        mov     r3, r0

        mov     r1, r3

        ldr     r0, [fp, #-8]     @ float

        bl      __aeabi_fadd

        mov     r3, r0

        str     r3, [fp, #-8]     @ float

        ldr     r3, [fp, #-12]

        add     r3, r3, #1

        str     r3, [fp, #-12]

.L2:

        ldr     r3, [fp, #-12]

        cmp     r3, #3

        ble     .L3

        mov     r3, #0

        mov     r0, r3

        sub     sp, fp, #4

        pop     {fp, pc}

.L5:

        .word   .LC0

        .word   .LC1