com_baud.s79

ARM入门的好帮手.包含了从简单到相对较复杂的程序.

        NAME com_baud

        RTMODEL "__code_model", "small"
        RTMODEL "__cpu_mode", "arm"
        RTMODEL "__data_model", "absolute"
        RTMODEL "__endian", "little"
        RTMODEL "__rt_version", "2"
        RTMODEL "__thumb_aware", "enabled"

        RSEG CSTACK:DATA:NOROOT(2)

        EXTERN ??divu32_a

        PUBLIC at91_baud_com
        FUNCTION at91_baud_com,0203H
        LOCFRAME CSTACK, 8, STACK
        PUBLIC at91_error_baud_com
        FUNCTION at91_error_baud_com,0203H
        LOCFRAME CSTACK, 16, STACK

        RSEG NEARFUNC_A:CODE:REORDER:NOROOT(2)
        
        CFI Names cfiNames0
        CFI StackFrame CFA SP HUGEDATA
        CFI Resource R0:32, R1:32, R2:32, R3:32, R4:32, R5:32, R6:32, R7:32
        CFI Resource R8:32, R9:32, R10:32, R11:32, R12:32, SP:32, LR:32
        CFI VirtualResource RET:32
        CFI EndNames cfiNames0
        
        CFI Common cfiCommon0 Using cfiNames0
        CFI CodeAlign 4
        CFI DataAlign 4
        CFI ReturnAddress RET CODE
        CFI CFA SP+0
        CFI R0 Undefined
        CFI R1 Undefined
        CFI R2 Undefined
        CFI R3 Undefined
        CFI R4 SameValue
        CFI R5 SameValue
        CFI R6 SameValue
        CFI R7 SameValue
        CFI R8 SameValue
        CFI R9 SameValue
        CFI R10 SameValue
        CFI R11 SameValue
        CFI R12 Undefined
        CFI LR Undefined
        CFI RET LR
        CFI EndCommon cfiCommon0
        
        CFI Block cfiBlock0 Using cfiCommon0
        CFI Function at91_baud_com
   CODE32   
at91_baud_com:
   STMDB    SP!,{R4,LR}        ;; Push
        CFI RET Frame(CFA, -4)
        CFI R4 Frame(CFA, -8)
        CFI CFA SP+8
   MOV      R3,#+0xA
   MUL      R2,R0,R3
   MOV      R0,R2
   MOV      R1,R1, LSL #+4
   BL       ??divu32_a
   MOV      R2,R1
   MOV      R0,R2
   MOV      R1,R3
   BL       ??divu32_a
   MOV      R0,R1, LSL #+16
   MOV      R0,R0, LSR #+16
   MUL      R4,R0,R3
   SUB      R1,R2,R4
   CMP      R1,#+0x5
   ADDCS    R0,R0,#+0x1
   MOV      R0,R0, LSL #+16
   MOV      R0,R0, LSR #+16
   LDMIA    SP!,{R4,PC}        ;; return
        CFI EndBlock cfiBlock0

        RSEG NEARFUNC_A:CODE:REORDER:NOROOT(2)
        CFI Block cfiBlock1 Using cfiCommon0
        CFI Function at91_error_baud_com
   CODE32   
at91_error_baud_com:
   STMDB    SP!,{R4-R6,LR}     ;; Push
        CFI RET Frame(CFA, -4)
        CFI R6 Frame(CFA, -8)
        CFI R5 Frame(CFA, -12)
        CFI R4 Frame(CFA, -16)
        CFI CFA SP+16
   MOV      R3,R0
   MOV      R2,R1
   MOV      R1,#+0xA
   MUL      R0,R1,R0
   MOV      R1,R2, LSL #+4
   BL       ??divu32_a
   MOV      R4,R1
   MOV      R0,R4
   MOV      R1,#+0xA
   BL       ??divu32_a
   MOV      R1,R1, LSL #+16
   MOV      R1,R1, LSR #+16
   MOV      R5,#+0xA
   MUL      R6,R1,R5
   SUB      R0,R4,R6
   CMP      R0,#+0x5
   ADDCS    R1,R1,#+0x1
   MOV      R0,R3
   MOV      R1,R1, LSL #+16
   MOV      R1,R1, LSR #+16
   MOV      R1,R1, LSL #+4
   BL       ??divu32_a
   CMP      R1,R2
   MOV      R3,#+0x64
   MULCC    R0,R1,R3
   MOVCC    R1,R2
   MULCS    R0,R2,R3
   BL       ??divu32_a
   MOV      R1,R1, LSL #+16
   MOV      R1,R1, LSR #+16
   RSB      R0,R1,#+0x64
   MOV      R0,R0, LSL #+16
   MOV      R0,R0, LSR #+16
   LDMIA    SP!,{R4-R6,PC}     ;; return
        CFI EndBlock cfiBlock1

        END
; 
; 216 bytes in segment NEARFUNC_A
; 
; 216 bytes of CODE memory
;
;Errors: none
;Warnings: none