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Last change
on this file since 105 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:
1.7 KB
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| Rev | Line | |
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| [54] | 1 | ; Project name : Assembly Library
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| 2 | ; Description : Functions for register operations.
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| 3 |
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| [66] | 4 |
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| [54] | 5 | ; Section containing code
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| 6 | SECTION .text
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| 7 |
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| 8 | ;--------------------------------------------------------------------
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| 9 | ; Registers_ExchangeDSSIwithESDI
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| 10 | ; Parameters
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| 11 | ; Nothing
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| 12 | ; Returns:
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| 13 | ; DS:SI and ES:DI are exchanged.
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| 14 | ; Corrupts registers:
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| 15 | ; Nothing
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| 16 | ;--------------------------------------------------------------------
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| 17 | ALIGN JUMP_ALIGN
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| 18 | Registers_ExchangeDSSIwithESDI:
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| 19 | push ds
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| 20 | push es
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| 21 | pop ds
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| 22 | pop es
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| 23 | xchg si, di
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| 24 | ret
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| 25 |
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| 26 |
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| 27 | ;--------------------------------------------------------------------
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| 28 | ; Registers_CopySSBPtoESDI
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| [105] | 29 | ; Registers_CopySSBPtoDSSI (uncommented to save bytes)
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| 30 | ; Registers_CopyDSSItoESDI (uncommented to save bytes)
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| 31 | ; Registers_CopyESDItoDSSI (uncommented to save bytes)
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| [54] | 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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| [105] | 39 | ALIGN JUMP_ALIGN
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| 40 | Registers_CopySSBPtoESDI:
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| 41 | COPY_SSBP_TO_ESDI
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| 42 | ret
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| [54] | 43 |
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| [105] | 44 | ;ALIGN JUMP_ALIGN
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| 45 | ;Registers_CopySSBPtoDSSI:
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| 46 | ; COPY_SSBP_TO_DSSI
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| 47 | ; ret
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| [54] | 48 |
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| [105] | 49 | ;ALIGN JUMP_ALIGN
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| 50 | ;Registers_CopyDSSItoESDI:
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| 51 | ; COPY_DSSI_TO_ESDI
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| 52 | ; ret
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| [54] | 53 |
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| [105] | 54 | ;ALIGN JUMP_ALIGN
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| 55 | ;Registers_CopyESDItoDSSI:
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| 56 | ; COPY_ESDI_to_DSSI
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| 57 | ; ret
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| [54] | 58 |
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| 59 |
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| 60 | ;--------------------------------------------------------------------
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| [105] | 61 | ; Registers_SetZFifNullPointerInDSSI (uncommented to save bytes)
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| [54] | 62 | ; Parameters
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| 63 | ; DS:SI: Far pointer
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| 64 | ; Returns:
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| 65 | ; ZF: Set if NULL pointer in DS:SI
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| 66 | ; Corrupts registers:
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| 67 | ; Nothing
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| 68 | ;--------------------------------------------------------------------
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| [105] | 69 | ;ALIGN JUMP_ALIGN
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| 70 | ;Registers_SetZFifNullPointerInDSSI:
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| 71 | ; push ax
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| 72 | ; mov ax, ds
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| 73 | ; or ax, si
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| 74 | ; pop ax
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| 75 | ; ret
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