warmup

code/warmup/exercise1.s

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+.psx
+.create "exercise1.bin", 0x80010000
+
+; Entry Point of Code
+.org 0x80010000
+
+; Constant declaration
+BASE_ADDR equ 0x0000
+
+
+; Symbol Alias Table
+
+; Instructions
+load_imm equ li
+
+; Registers
+rtemp_0 equ $t0
+rtemp_1 equ $t1
+rtemp_2 equ $t2
+
+.macro test,dst_reg,value
+	li dst_reg,value
+.endmacro
+
+.macro test2,reg
+	li reg,0xA000
+.endmacro
+
+.macro myli,dest,value
+   .if value & ~0xFFFF
+      ori   dest,r0,value
+   .elseif (value & 0xFFFF8000) == 0xFFFF8000
+      addiu dest,r0,value & 0xFFFF
+   .elseif (value & 0xFFFF) == 0
+      lui   dest,value >> 16
+   .else
+      lui   dest,value >> 16 + (value & 0x8000 != 0)
+      addiu dest,dest,value & 0xFFFF
+   .endif
+.endmacro
+
+.macro store_word, src_reg, dst_address
+	sw src_reg, dst_address
+.endmacro
+
+Main:
+	myli $t0, 0xA000
+	li rtemp_1, 0xA100     ; $t1 = 0xA100
+	li rtemp_2, 0x11111111 ; $t2 = 0x11111111
+
+Loop:
+	sw   $t2, BASE_ADDR($t0) ; Store byte at 0x0000 + t0
+	addi $t0, $t0, 4         ; ++ t0
+	blt  $t0, $t1, Loop      ; while (t0 < t1) keep looping
+
+.close