TASKING VX-toolset for ARM User Guide

TASKING VX-toolset for ARM User GuideExample 4: using input and output parametersAdd two C variables and assign the result to a third C variable. Registers are used for the input and outputparameters (constraint r, %0 for out, %1 for in1, %2 for in2 in the instruction template). The compilergenerates code to move the input expressions into the input registers and to assign the result to the outputvariable.int in1, in2, out;void add32( void ){__asm( "add %0, %1, %2": "=r" (out): "r" (in1), "r" (in2) );}Generated assembly code:.L2:ldr r0,.L2ldr r1,[r0,#0]ldr r0,[r0,#4]add r0, r1, r0ldr r1,.L2str r0,[r1,#8]bx lr.size add32,$-add32.align 4.dw in1.section .bss.global in1.align 4in1: .type object.size in1,4.ds 4.global in2.align 4in2: .type object.size in2,4.ds 4.global out.align 4out: .type object.size out,4.ds 4.endsec8