Script started on Mon 17 Feb 2025 02:23:50 PM EST
[mweeks@gsuad.gsu.edu@snowball ~]$ cat example1b.s
# example1b.s
#
#   java -jar /home/mweeks/rars1_6.jar example1b.s
#
# This is different from example1.s because it uses "addi"
# instead of putting each value into registers.
#
# -MCW, 2025

.text
main:

    #  1. get these values into registers
    #     load the value 37 into x1
    li x1, 37
    #     load the value 24 into x2
    #     load the value 17 into x3
    #li x2, 24
    #li x3, 17

    #  2. add x1 to x2 
    #add x4, x1, x2
    #  2. add x1 to 24 
    addi x1, x1, 24

    #  3. sub x3 from (x1 + x2)
    #sub x4, x4, x3
    #  3. add -17 to sum
    addi x1, x1, -17


    # print x1
    mv    a0, x1
    li    a7, 1
    ecall

    # print NL
    li    a7, 11
    li    a0, 10
    ecall

    # Exit the program with a return code
    li     a7, 93
    li     a0, 0    # 0 for everything is OK
    ecall

.data 
helloworld:      .string "Hello World\n"


[mweeks@gsuad.gsu.edu@snowball ~]$  java -jar /home/mweeks/rars1_6.jar example1b.s
RARS 1.6  Copyright 2003-2019 Pete Sanderson and Kenneth Vollmar

44
[mweeks@gsuad.gsu.edu@snowball ~]$ cat example1c.s
# example1c.s
#
#   java -jar /home/mweeks/rars1_6.jar example1c.s
#
# This is different from example1.s because it gets all 3 values
# from the data section.
#
# -MCW, 2025

.text
main:

    #  1. get these values into registers
    #     load the value 37 into x1
    la  x2, myvalues
    lb  x1, 0(x2)
    #     load the value 24 into x2
    #     load the value 17 into x3
    #li x2, 24
    #li x3, 17

    #  2. add x1 to x2 
    #add x4, x1, x2
    #  2. add x1 to 24 
    #addi x1, x1, 24
    addi x2, x2, 1
    lb   x3, 0(x2)
    add  x1, x1, x3

    #  3. sub x3 from (x1 + x2)
    #sub x4, x4, x3
    #  3. add -17 to sum
    #addi x1, x1, -17
    addi x2, x2, 1
    lb   x3, 0(x2)
    add  x1, x1, x3


    # print x1
    mv    a0, x1
    li    a7, 1
    ecall

    # print NL
    li    a7, 11
    li    a0, 10
    ecall

    # Exit the program with a return code
    li     a7, 93
    li     a0, 0    # 0 for everything is OK
    ecall

.data 
helloworld:      .string "Hello World\n"
myvalues:        .byte 37, 24, -17

[mweeks@gsuad.gsu.edu@snowball ~]$  java -jar /home/mweeks/rars1_6.jar example1c.s
RARS 1.6  Copyright 2003-2019 Pete Sanderson and Kenneth Vollmar

44
[mweeks@gsuad.gsu.edu@snowball ~]$ cat example1_Venus.S 
# example1_Venus.s
#
#  Use VSCode/Venus for this
#
# -MCW, 2025

.text
main:

#  1. get these values into registers
#     load the value 37 into x1
#     load the value 24 into x2
#     load the value 17 into x3
        li x1, 37
        li x2, 24
        li x3, 17

#  2. add x1 to x2 
        add x4, x1, x2
#  3. sub x3 from (x1 + x2)
        sub x4, x4, x3


    # print x4
    mv    a1, x4
    li    a0, 1
    ecall

    # print NL
    li    a0, 11
    li    a1, 10
    ecall

        # Exit the program with a return code
        li     a0, 17
        li     a1, 0    # 0 for everything is OK
        ecall

.data 
helloworld:      .string "Hello World\n"

[mweeks@gsuad.gsu.edu@snowball ~]$ cat example2.s
# example2.s
#
#   java -jar /home/mweeks/rars1_6.jar example2.s
#
# This movie 2001 A Space Odyssey features a computer called "HAL".
# What do you get when you add 1 to each character code? This program
# does that.
#
# -MCW, 2025

.text
main:

    # Use s0 since it is "saved"
    # load the first char value into x1
    la  s0, mychars 
    lb  x1, 0(s0)

    # add 1 to it
    addi x1, x1, 1

    # print it out as a char
    mv   a0, x1
    li   a7, 11
    ecall

    # print space
    li    a7, 11
    li    a0, 32
    ecall

    ##############################
    # REPEAT with small change
    ##############################

    # load the next char value into x1
    lb  x1, 1(s0)

    # add 1 to it
    addi x1, x1, 1

    # print it out as a char
    mv   a0, x1
    li   a7, 11
    ecall

    # print space
    li    a7, 11
    li    a0, 32
    ecall

    ##############################
    # REPEAT with small changes
    ##############################

    # load the next char value into x1
    lb  x1, 2(s0)

    # add 1 to it
    addi x1, x1, 1

    # print it out as a char
    mv   a0, x1
    li   a7, 11
    ecall

    # print NL
    li    a7, 11
    li    a0, 10
    ecall



    # Exit the program with a return code
    li     a7, 93
    li     a0, 0    # 0 for everything is OK
    ecall

.data 
mychars:         .string "HAL"

[mweeks@gsuad.gsu.edu@snowball ~]$  java -jar /home/mweeks/rars1_6.jar example2.s
RARS 1.6  Copyright 2003-2019 Pete Sanderson and Kenneth Vollmar

I B M
[mweeks@gsuad.gsu.edu@snowball ~]$ exit
exit

Script done on Mon 17 Feb 2025 02:48:52 PM EST