Hello, this answer seems inconsistent with the Simulator used. The known commands in the simulator are lesser than the ones listed here in the answer. For example there are no $.$ commands meaning no $.$global$\_$start$.$

Below I will list the available commands:

"Here's a summary of the RISC$-$V instructions:

Ending the Program:

ebreak x$0,$ x$0,0$: Halts execution without an error indication.

Arithmetic Operations:

addi rd$,$ rs$1,$ imm: Adds an immediate value to a register.

add rd$,$ rs$1,$ rs$2$: Adds values from two registers.

sub rd$,$ rs$1,$ rs$2$: Subtracts values from two registers.

Environment Call:

ecall rd$,$ rs$,$ imm: Requests services from the operating system.

Shift Operations:

slli rd$,$ rs$1,$ imm: Shifts bits left, effectively multiplying by $2^$imm.

srli rd$,$ rs$1,$ imm: Shifts bits right logically$,$ dividing by $2^$imm.

srai rd$,$ rs$1,$ imm: Shifts bits right arithmetically, preserving sign.

Bitwise Logical Operations:

andi rd$,$ rs$1,$ imm: Bitwise AND with an immediate value.

and rd$,$ rs$1,$ rs$2$: Bitwise AND between two registers.

or rd$,$ rs$1,$ rs$2$: Bitwise OR between two registers.

xor rd$,$ rs$1,$ rs$2$: Bitwise XOR between two registers.

xori rd$,$ rs$1,$ imm: Bitwise XOR with an immediate value.

Loading a Large Immediate:

lui rd$,$ imm: Loads the upper $20$ bits of an immediate value.

Memory Operations:

ld rd$,$ imm$($rs$1)$: Loads a value from memory into a register.

sd rd$,$ imm$($rs$1)$: Stores a value from a register into memory.

Labels and Pseudo$-$Instructions:

labelName: DD $($value$)$: Stores an integer in memory.

labelName: DC $($string$)$: Stores a string in memory.

labelName: EQU value operation: Assigns a calculated value to a label.

labelName: DM value: Reserves a block of memory.

ORG value: Sets a starting memory address.

Branching:

bge rs$1,$ rs$2,$ labelName: Branches if rs$1>=$ rs$2.$

beq rs$1,$ rs$2,$ labelName: Branches if rs$1==$ rs$2.$

bne rs$1,$ rs$2,$ labelName: Branches if rs$1!=$ rs$2.$

blt rs$1,$ rs$2,$ labelName: Branches if rs$1$ rs$2.$

Function Return:

jalr x$0,0($ra$)$: Returns from a function.

Additional Notes:

rd$,$ rs$1,$ rs$2,$ and imm are placeholders for register names and immediate values.

RISC$-$V instructions typically follow a "three$-$register" format.

Memory operations often use offsets from base addresses in registers.

Branching instructions control program flow based on conditions.

Function calls and returns are essential for modular programming.