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Last change
on this file since 105 was
105,
checked in by aitotat, 13 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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