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[/] [eco32/] [trunk/] [binutils/] [tests-2/] [hello/] [hello.s] - Blame information for rev 157

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Line No. Rev Author Line
1 7 hellwig
;
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; hello.s -- Hello, world!
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;
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; $11  I/O base address
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; $12  temporary value
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; $13  character
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; $14  pointer to string
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; $29 stack pointer
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; $31 return address
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        .set    tba,0xF0300000
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reset:  add     $29,$0,0xC0010000
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        jal     start
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reset1: j       reset1
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start:  sub     $29,$29,4       ; save return register
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        stw     $31,$29,0
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        add     $11,$0,tba       ; set I/O base address
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        add     $14,$0,hello     ; pointer to string
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        or      $14,$14,hello
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loop:   ldbu    $13,$14,0        ; get char
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        beq     $13,$0,stop      ; null - finished
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        jal     out             ; output char
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        add     $14,$14,1       ; bump pointer
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        j       loop            ; next char
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stop:   ldw     $31,$29,0        ; restore return register
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        add     $29,$29,4
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        jr      $31             ; return
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out:    ldw     $12,$11,8       ; get status
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        and     $12,$12,1       ; xmtr ready?
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        beq     $12,$0,out       ; no - wait
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        stw     $13,$11,12      ; send char
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        jr      $31             ; return
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hello:  .byte   "Hello, world!"
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        .byte   0x0D, 0x0A, 0

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