How to take in multiple inputs from user in assembly -


i'm pretty new assembly. know how take in 1 value user, if want user input 3 numbers separated spaces.

i'm trying store each of them separate register, this.

push qword 0                        ;make space 8-byte number push qword 0                        ;make space 8-byte number push qword 0                        ;make space 8-byte number                                             mov qword  rdi, formatfloatinput                             mov qword  rsi, rsp                                          mov qword  rax, 0                                            call       scanf                                               pop qword r15                   ;pop value stack r15                             pop qword r14                   ;pop next value in stack r14? pop qword r13                   ;pop next value in stack r13?

sample input: 13 15 36

now r15 should contain 13, r14 contains 15 , r13 contains 36.

the c equivalent scanf("%ld %ld %ld", &r15, &r14, &r13). notice have pass 3 pointers, each of output variables. pass 1. also, formatfloatinput misleading, reading integer registers, need integer format. should work:

push qword 0                        ;make space 8-byte number push qword 0                        ;make space 8-byte number push qword 0                        ;make space 8-byte number mov qword  rdi, format mov qword  rsi, rsp                 ; &r15 lea rdx, [rsp+8]                    ; &r14 lea rcx, [rsp+16]                   ; &r13 mov qword  rax, 0 call       scanf pop qword r15                   ;pop value stack r15 pop qword r14                   ;pop next value in stack r14? pop qword r13                   ;pop next value in stack r13? .... format: db "%ld %ld %ld", 0

pushing , popping not usual way write this, isn't wrong such. remember keep stack aligned if calling convention requires that.


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