software

10byteSwap.asm

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+PRESERVE8
+THUMB
+AREA |.text|, CODE, READONLY
+EXPORT __main
+
+__main
+    LDR R0, =0x20000000
+    LDR R1, =0x20000100
+    MOVS R2, #10
+swap_loop
+    LDRB R3, [R0]
+    LDRB R4, [R1]
+    STRB R4, [R0]
+    STRB R3, [R1]
+    ADDS R1,R1,#1
+    ADDS R0,R0,#1
+    SUBS R2,R2,#1
+    BNE swap_loop
+STOP
+    B STOP
+END    
+

bitExtractClear.asm

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+PRESERVE8
+THUMB
+AREA |.text|, CODE, READONLY
+EXPORT __main
+__main
+    LDR R0,=0xFFC0FFFF
+    LSLS R0,R0,(#32-8-16) ;(32-W-P)
+    LSRS R0,R0,(#32-W) ;(32-W)
+    
+    LDR R0,=0XFFC0FFFF
+    MOVS R1, #16 ; #P
+    MOVS R2, #8 ;W
+    MOVS R3, #(32-8-16) ;(32-W-P)
+
+    RORS R0,R0,R1
+    LSRS R0,R0,R2
+    RORS R0,R0,R3
+STOP
+    B STOP
+END
+

factorial.asm

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+PRESERVE8
+THUMB
+AREA |.text|, CODE, READONLY
+EXPORT main
+
+main
+    MOVS R6,#5
+    MOVS R4,R6
+    SUBS R4,R4,#1
+LOOP
+    MOVS R7,R4
+    MULS R7,R6,R7
+    MOVS R6,R7
+    SUBS R4,R4,#1
+    BNE LOOP
+STOP
+    B STOP
+END    

func.asm

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+PRESERVE8
+THUMB
+AREA |.text|, CODE, READONLY
+EXPORT func
+EXTERN func2
+__func
+    PUSH{LR}
+    MOVS R0, #5
+    BL func2
+    POP{PC}
+END

func2.asm

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+PRESERVE8
+THUMB
+AREA |.text|, CODE, READONLY
+EXPORT func2
+func2
+    MOVS R1, #5
+    BX LR
+END

main.asm

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+PRESERVE8
+THUMB
+AREA |.text|, CODE, READONLY
+EXPORT __main
+EXTERN func
+__main
+    BL func
+    MOVS R0, #40
+    NOP
+STOP
+    B STOP
+END

pushPop.asm

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+PRESERVE8
+THUMB 
+AREA |.text|, CODE, READONLY
+EXPORT __main
+
+__main
+    LDR R3,=0X20000100
+    LDR R0,=0X20000050
+    LDMIA R3!,{R1,R2}
+
+    MOV SP, R0
+    PUSH {R1,R2}
+    POP {R1,R2}
+STOP
+    B STOP
+END    
+

switchCase.asm

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+PRESERVE8
+THUMB
+AREA |.text|, CODE, READONLY
+EXPORT __main
+__main
+    LDR R0,= 0
+    CMP R0, #3
+    BHI default_case
+    MOVS R2, #4
+    MULS R0,R0,R2
+    LDR R1,= BranchTable
+    LDR R2, [R1,R0]
+    BX R2
+    ALIGN 4
+BranchTable
+    DCD Dest0
+    DCD Dest1
+    DCD Dest2
+    DCD Dest3
+default_case
+    stop
+        B stop
+Dest0 
+    LDR R0, =10
+    stop1
+        B stop1
+Dest1 
+    LDR R0, =20
+    stop2
+        B stop2  
+Dest2 
+    LDR R0, =30
+    stop3
+        B stop3   
+Dest3 
+    LDR R0, =40
+    stop4 
+        B stop4
+END