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Last change
on this file since 100 was 86, checked in by krille_n_@…, 14 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
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| Rev | Line | |
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| [86] | 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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