Last change
on this file since 96 was
86,
checked in by krille_n_@…, 13 years ago
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Size optimizations in various files in the XTIDE BIOS.
Also added a new include file for generic macros (macros.inc).
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File size:
1.3 KB
|
Line | |
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1 | ; Project name : XTIDE Universal BIOS |
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2 | ; Description : This is the place to put various generic macros. |
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3 | ; Should be included immediately after emulate.inc |
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4 | |
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5 | ;-------------------------------------------------------------------- |
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6 | ; Skips the immediately following 2 byte instruction by using it |
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7 | ; as an immediate value to a dummy instruction. |
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8 | ; Destroys the contents of %1. |
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9 | ; |
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10 | ; SKIP2B |
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11 | ; Parameters: |
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12 | ; %1: Any 16 bit general purpose register or F for flags. |
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13 | ; Returns: |
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14 | ; Nothing |
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15 | ; Corrupts registers: |
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16 | ; %1 |
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17 | ;-------------------------------------------------------------------- |
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18 | %macro SKIP2B 1 |
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19 | %ifidni %1, f |
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20 | db 03Dh ; Opcode byte for CMP AX, <immed> |
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21 | ;db 0A9h ; Alt. version TEST AX, <immed> |
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22 | %elifidni %1, ax |
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23 | db 0B8h ; Opcode byte for MOV AX, <immed> |
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24 | %elifidni %1, cx |
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25 | db 0B9h ; Opcode byte for MOV CX, <immed> |
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26 | %elifidni %1, dx |
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27 | db 0BAh ; Opcode byte for MOV DX, <immed> |
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28 | %elifidni %1, bx |
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29 | db 0BBh ; Opcode byte for MOV BX, <immed> |
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30 | %elifidni %1, sp |
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31 | db 0BCh ; Opcode byte for MOV SP, <immed> |
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32 | %elifidni %1, bp |
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33 | db 0BDh ; Opcode byte for MOV BP, <immed> |
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34 | %elifidni %1, si |
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35 | db 0BEh ; Opcode byte for MOV SI, <immed> |
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36 | %elifidni %1, di |
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37 | db 0BFh ; Opcode byte for MOV DI, <immed> |
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38 | %else |
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39 | %error "Invalid parameter passed to SKIP2B" |
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40 | %endif |
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41 | %endmacro |
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