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Last change
on this file since 126 was 105, checked in by Tomi Tilli, 14 years ago |
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Changes to Assembly Library:
- More optimizations to reduce size.
- Removed some utility functions to reduce size.
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File size:
1.5 KB
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| 1 | ; Project name : Assembly Library
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| 2 | ; Description : Register related macros.
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| 3 | %ifndef REGISTERS_INC
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| 4 | %define REGISTERS_INC
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| 5 |
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| 6 | ;--------------------------------------------------------------------
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| 7 | ; NORMALIZE_FAR_POINTER
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| 8 | ; Parameters:
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| 9 | ; %1:%2: Far pointer to normalize
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| 10 | ; %3: Scratch register
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| 11 | ; %4: Scratch register
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| 12 | ; Returns:
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| 13 | ; %1:%2: Normalized far pointer
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| 14 | ; Corrupts registers:
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| 15 | ; %3, %4
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| 16 | ;--------------------------------------------------------------------
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| 17 | %macro NORMALIZE_FAR_POINTER 4
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| 18 | mov %4, %2 ; Copy offset to scratch reg
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| 19 | and %2, BYTE 0Fh ; Clear offset bits 15...4
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| 20 | eSHR_IM %4, 4 ; Divide offset by 16
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| 21 | mov %3, %1 ; Copy segment to scratch reg
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| 22 | add %3, %4 ; Add shifted offset to segment
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| 23 | mov %1, %3 ; Set normalized segment
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| 24 | %endmacro
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| 25 |
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| 26 |
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| 27 | ;--------------------------------------------------------------------
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| 28 | ; COPY_SSBP_TO_ESDI
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| 29 | ; COPY_SSBP_TO_DSSI
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| 30 | ; COPY_DSSI_TO_ESDI
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| 31 | ; COPY_ESDI_to_DSSI
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| 32 | ; Parameters
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| 33 | ; Nothing
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| 34 | ; Returns:
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| 35 | ; Copies farm pointer to different segment/pointer register pair
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| 36 | ; Corrupts registers:
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| 37 | ; Nothing
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| 38 | ;--------------------------------------------------------------------
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| 39 | %macro COPY_SSBP_TO_ESDI 0
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| 40 | push ss
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| 41 | pop es
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| 42 | mov di, bp
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| 43 | %endmacro
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| 44 |
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| 45 | %macro COPY_SSBP_TO_DSSI 0
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| 46 | push ss
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| 47 | pop ds
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| 48 | mov si, bp
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| 49 | %endmacro
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| 50 |
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| 51 | %macro COPY_DSSI_TO_ESDI 0
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| 52 | push ds
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| 53 | pop es
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| 54 | mov di, si
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| 55 | %endmacro
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| 56 |
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| 57 | %macro COPY_ESDI_to_DSSI 0
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| 58 | push es
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| 59 | pop ds
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| 60 | mov si, di
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| 61 | %endmacro
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| 62 |
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| 63 |
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| 64 |
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| 65 | %endif ; REGISTERS_INC
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