# Test for divmod

.org 0
# Provide program starting address to linker
.global _start

.extern div
.extern tohex

/* newlib system calls */
.set SYSEXIT,  93
.set SYSWRITE, 64

.section .rodata

inputs:
    .word 3
    .word 5

    .word 21
    .word 3

    .word 0xFFFF
    .word 100

    # Division of this one doesn't work yet
    # .word -7
    # .word 3
inputs_end:

.section .bss

buf: .skip 9

.text

_start:
    li a0, '\n'
    la a1, buf
    sb a0, 8(a1)        # append newline to buf

    la s0, inputs       # init loop variables
loop:
    lw a0, 0(s0)        # dividend
    lw a1, 4(s0)        # divisor
    jal divmod
    mv s1, a1           # save remainder

    # print quotient
    la a1, buf
    jal tohex
    li t0, SYSWRITE     # "write" syscall
    li a0, 1            # 1 = standard output (stdout)
    la a1, buf          # load address of output string
    li a2, 8            # length of output string
    ecall               # invoke syscall to print the string

    # print ,
    li t0, SYSWRITE     # "write" syscall
    li a0, 1            # 1 = standard output (stdout)
    la a1, buf          # load address of output string
    li a2, ','
    sb a2, 0(a1)
    li a2, 1            # length of output string
    ecall               # invoke syscall to print the string

    # print remainder
    mv a0, s1           # restore remainder
    la a1, buf
    jal tohex
    li t0, SYSWRITE     # "write" syscall
    li a0, 1            # 1 = standard output (stdout)
    la a1, buf          # load address of output string
    li a2, 9            # length of output string
    ecall               # invoke syscall to print the string

    addi s0, s0, 8      # increment input pointer to next pair of inputs
    la a0, inputs_end
    bltu s0, a0, loop   # if the input address is less than inputs_end, loop

    li t0, SYSEXIT      # "exit" syscall
    la a0, 0            # Use 0 return code
    ecall               # invoke syscall to terminate the program