source: xtideuniversalbios/trunk/Assembly_Library/Inc/Math.inc@ 167

Last change on this file since 167 was 41, checked in by Tomi Tilli, 14 years ago

Initial commit for Assembly Library.
File size: 1.5 KB
Line 
1; File name : Math.inc
2; Project name : Assembly Library
3; Created date : 12.8.2010
4; Last update : 12.8.2010
5; Author : Tomi Tilli
6; Description : Math related macros.
7%ifndef MATH_INC
8%define MATH_INC
9
10FALSE EQU 0
11TRUE EQU 1
12
13
14;--------------------------------------------------------------------
15; MIN_U Unsigned comparison
16; MIN_S Signed comparison
17; Parameters:
18; %1: Operand 1
19; %2: Operand 2
20; Returns:
21; %1: Lesser operand
22; Corrupts registers:
23; Nothing
24;--------------------------------------------------------------------
25%macro MIN_U 2
26 cmp %1, %2 ; Is %1 smaller?
27 jb %%Return ; If so, return
28 mov %1, %2 ; Copy %2 to %1
29ALIGN JUMP_ALIGN
30%%Return:
31%endmacro
32
33%macro MIN_S 2
34 cmp %1, %2 ; Is %1 smaller?
35 jl %%Return ; If so, return
36 mov %1, %2 ; Copy %2 to %1
37ALIGN JUMP_ALIGN
38%%Return:
39%endmacro
40
41
42;--------------------------------------------------------------------
43; MAX_U Unsigned comparison
44; MAX_S Signed comparison
45; Parameters:
46; %1: Operand 1
47; %2: Operand 2
48; Returns:
49; %1: Lesser operand
50; Corrupts registers:
51; Nothing
52;--------------------------------------------------------------------
53%macro MAX_U 2
54 cmp %1, %2 ; Is %1 greater?
55 ja %%Return ; If so, return
56 mov %1, %2 ; Copy %2 to %1
57ALIGN JUMP_ALIGN
58%%Return:
59%endmacro
60
61%macro MAX_S 2
62 cmp %1, %2 ; Is %1 greater?
63 jg %%Return ; If so, return
64 mov %1, %2 ; Copy %2 to %1
65ALIGN JUMP_ALIGN
66%%Return:
67%endmacro
68
69
70%endif ; MATH_INC
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