source: xtideuniversalbios/trunk/Assembly_Library/Inc/Registers.inc@ 146

Last change on this file since 146 was 146, checked in by Tomi Tilli, 14 years ago

Changes to Assembly Library:

  • Added INTPACK macros.
File size: 3.0 KB
Line 
1; Project name : Assembly Library
2; Description : Register related macros.
3%ifndef REGISTERS_INC
4%define REGISTERS_INC
5
6struc INTPACK
7%ifdef USE_386
8 .gs resb 2
9 .fs resb 2
10%endif
11 .es resb 2
12 .ds resb 2
13 .di resb 2
14 .si resb 2
15 .bp resb 2
16 .sp resb 2
17 .bx:
18 .bl resb 1
19 .bh resb 1
20 .dx:
21 .dl resb 1
22 .dh resb 1
23 .cx:
24 .cl resb 1
25 .ch resb 1
26 .ax:
27 .al resb 1
28 .ah resb 1
29 .ip resb 2
30 .cs resb 2
31 .flags resb 2
32endstruc
33
34; 8086/8088 FLAGS
35FLG_FLAGS_CF EQU (1<<0)
36FLG_FLAGS_PF EQU (1<<2)
37FLG_FLAGS_AF EQU (1<<4)
38FLG_FLAGS_ZF EQU (1<<6)
39FLG_FLAGS_SF EQU (1<<7)
40FLG_FLAGS_TF EQU (1<<8)
41FLG_FLAGS_IF EQU (1<<9)
42FLG_FLAGS_DF EQU (1<<10)
43FLG_FLAGS_OF EQU (1<<11)
44
45
46;--------------------------------------------------------------------
47; This macro must be the first thing to call on Interrupt Service Routine.
48;
49; SAVE_AND_GET_INTPACK_TO_SSBP
50; Parameters
51; Nothing
52; Returns:
53; SS:BP: Points to INTPACK
54; Corrupts registers:
55; Nothing
56;--------------------------------------------------------------------
57%macro SAVE_AND_GET_INTPACK_TO_SSBP 0
58 ePUSHA
59 push ds
60 push es
61%ifdef USE_386
62 push fs
63 push gs
64%endif
65 mov bp, sp
66%endmacro
67
68;--------------------------------------------------------------------
69; This macro must be the last thing to call on Interrupt Service Routine.
70;
71; RESTORE_INTPACK_FROM_SSBP
72; Parameters
73; SS:BP: Ptr to INTPACK
74; Returns:
75; All Registers will be loaded from INTPACK
76;--------------------------------------------------------------------
77%macro RESTORE_INTPACK_FROM_SSBP 0
78%ifdef USE_386
79 pop gs
80 pop fs
81%endif
82 pop es
83 pop ds
84 ePOPA
85 iret
86%endmacro
87
88
89;--------------------------------------------------------------------
90; NORMALIZE_FAR_POINTER
91; Parameters:
92; %1:%2: Far pointer to normalize
93; %3: Scratch register
94; %4: Scratch register
95; Returns:
96; %1:%2: Normalized far pointer
97; Corrupts registers:
98; %3, %4
99;--------------------------------------------------------------------
100%macro NORMALIZE_FAR_POINTER 4
101 mov %4, %2 ; Copy offset to scratch reg
102 and %2, BYTE 0Fh ; Clear offset bits 15...4
103 eSHR_IM %4, 4 ; Divide offset by 16
104 mov %3, %1 ; Copy segment to scratch reg
105 add %3, %4 ; Add shifted offset to segment
106 mov %1, %3 ; Set normalized segment
107%endmacro
108
109
110;--------------------------------------------------------------------
111; COPY_SSBP_TO_ESDI
112; COPY_SSBP_TO_DSSI
113; COPY_DSSI_TO_ESDI
114; COPY_ESDI_to_DSSI
115; Parameters
116; Nothing
117; Returns:
118; Copies farm pointer to different segment/pointer register pair
119; Corrupts registers:
120; Nothing
121;--------------------------------------------------------------------
122%macro COPY_SSBP_TO_ESDI 0
123 push ss
124 pop es
125 mov di, bp
126%endmacro
127
128%macro COPY_SSBP_TO_DSSI 0
129 push ss
130 pop ds
131 mov si, bp
132%endmacro
133
134%macro COPY_DSSI_TO_ESDI 0
135 push ds
136 pop es
137 mov di, si
138%endmacro
139
140%macro COPY_ESDI_to_DSSI 0
141 push es
142 pop ds
143 mov si, di
144%endmacro
145
146
147
148%endif ; REGISTERS_INC
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