attempts at warmup exercises.

code/warmup/exercise_2.s

@@ -0,0 +1,47 @@
+.psx
+.create "exercise_2.bin", 0x80010000
+
+; Entry Point of Code
+.org 0x80010000
+
+; Constant declaration
+BASE_ADDR equ 0x0000
+
+; Symbol Alias Table
+
+; Instructions
+; Load
+load_imm   equ li ; dst_reg, immeidate value
+; Store
+store_word equ sw ; src_reg, dst_address 
+; Addition
+add_s  equ add   ; dst_reg, reg_a, reg_b (signed)
+add_u  equ add   ; dst_reg, reg_a, reg_b (unsigned)
+add_si equ addi  ; dst_reg, src_reg, immediate value (signed)
+add_ui equ addiu ; dst_reg, src_reg, immediate value (unsigned)
+; Branch
+branch_equal equ beq ; reg, value(reg, immediate), dst_label
+
+; Registers
+; Temporaries, may be changed by subroutines
+rtemp_0 equ $t0
+rtemp_1 equ $t1
+rtemp_2 equ $t2
+
+main:
+	; TODO:
+	;	1. Start $t0 with the value 1 and $t1 with the value 0
+	;	2. Loop, incrementing $t0 until it reaches the value 10
+	;	3. Keep adding and accumulating all values of $t0 inside $t1
+
+	; Attempt:
+	load_imm rtemp_0, 1
+	load_imm rtemp_1, 0
+loop:
+	add_s        rtemp_1, rtemp_1, rtemp_0
+	add_si       rtemp_0, rtemp_0, 1
+	branch_equal rtemp_0, 10, end
+	nop
+	j            loop
+end:
+.close