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Ingy döt Net 2026-04-30 12:34:36 -04:00
parent 4bb20c9b71
commit cbaf4c4b64
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Task/String-append/RISC-V-Assembly/string-append.asm Normal file
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# riscv assembly raspberry pico2 rp2350
# program appstring.s
# connexion putty com3
/*********************************************/
/* CONSTANTES */
/********************************************/
/* for this file see risc-v task include a file */
.include "../../constantesRiscv.inc"
.equ BUFFERSIZE, 100
/*******************************************/
/* INITIALED DATAS */
/*******************************************/
.data
szMessStart: .asciz "Program riscv start.\r\n"
szMessEndOk: .asciz "Program riscv end OK.\r\n"
szCariageReturn: .asciz "\r\n"
szMessString: .asciz "String :\n"
szString1: .asciz "Alphabet : "
sComplement: .fill BUFFERSIZE,1,0
szString2: .asciz "abcdefghijklmnopqrstuvwxyz"
.align 2
/*******************************************/
/* UNINITIALED DATA */
/*******************************************/
.bss
.align 2
/**********************************************/
/* SECTION CODE */
/**********************************************/
.text
.global main
main:
call stdio_init_all # général init
1: # start loop connexion
li a0,0 # raz argument register
call tud_cdc_n_connected # waiting for USB connection
beqz a0,1b # return code = zero ?
la a0,szMessStart # message address
call writeString # display message
la a0,szMessString # message address
call writeString # display message
la a0,szString1 # message address
call writeString # display message
la a0,szCariageReturn # message address
call writeString # display message
la a0,szMessString # message address
call writeString # display message
la a0,szString2 # message address
call writeString # display message
la a0,szCariageReturn # message address
call writeString # display message
la a0,szString1
la a1,szString2
call append
la a0,szMessString # message address
call writeString # display message
la a0,szString1 # message address
call writeString # display message
la a0,szCariageReturn # message address
call writeString # display message
la a0,szMessEndOk # message address
call writeString # display message
call getchar
100: # final loop
j 100b
/*********************************************/
/* add string to string */
/*********************************************/
/* no verfication size complement buffer */
/* a0 contains address String 1 */
/* a1 contains address String 2 */
append:
addi sp, sp, -4
sw ra, 0(sp)
li t0,0 # counter byte string 1
1:
add t1,a0,t0
lbu t2,(t1) # load byte string 1
beqz t2,2f # zero final ?
addi t0,t0,1 # no -> increment counter
j 1b # loop
2:
li t3, 0 # counter byte string 2
3:
add t4,a1,t3
lbu t5,(t4) # load byte string 2
add t1,a0,t0
sb t5,(t1) # store byte string 1
beqz t5,100f # zero final ? -> end
addi t3,t3,1 # increment counter
addi t0,t0,1
j 3b # end loop
100:
lw ra, 0(sp)
addi sp, sp, 4
ret
/************************************/
/* file include Fonctions */
/***********************************/
/* for this file see risc-v task include a file */
.include "../../includeFunctions.s"