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annotate lib/alib/to_upprs.as @ 2784:2594295f9cc7 lwtools-port

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Merged Drencor's work
author Boisy Pitre <boisy.pitre@nuance.com>
date Sat, 26 Jan 2013 17:19:06 -0600
parents 03f26e88b809
children
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1 *******************************
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2
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3 * convert a null terminated string to all uppercase
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4
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5 * OTHER MODULES NEEDED: TO_UPPER
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6
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7 * ENTRY: X=start of string
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8
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9 * EXIT: all registers (except CC) preserved
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12 nam Convert String to Uppercase
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13 ttl Assembler Library Module
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aaba193af04f Updated code to use lwasm/lwlink
Boisy Pitre <boisy.pitre@nuance.com>
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16 section .text
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17
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18 TO_UPPRS:
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19 pshs cc,b,x
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21 loop
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22 ldb ,x get char to check
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23 beq exit exit if all done
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24 lbsr TO_UPPER convert to upper
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25 stb ,x+ put back in string
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26 bra loop
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27
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28 exit
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29 puls cc,b,x,pc
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31 endsect
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