1/*
2 * Copyright (C) 2008 Advanced Micro Devices, Inc.
3 * Copyright (C) 2016 Bin Meng <bmeng.cn@gmail.com>
4 *
5 * Modified from coreboot src/arch/x86/acpi/globutil.asl
6 *
7 * SPDX-License-Identifier:	GPL-2.0+
8 */
9
10Method(MIN, 2)
11{
12	If (LLess(Arg0, Arg1)) {
13		Return (Arg0)
14	} Else {
15		Return (Arg1)
16	}
17}
18
19Method(SLEN, 1)
20{
21	Store(Arg0, Local0)
22	Return (Sizeof(Local0))
23}
24
25Method(S2BF, 1, Serialized)
26{
27	Add(SLEN(Arg0), One, Local0)
28	Name(BUFF, Buffer(Local0) {})
29	Store(Arg0, BUFF)
30	Return (BUFF)
31}
32
33/*
34 * SCMP - Strong string compare
35 *
36 * Checks both length and content
37 */
38Method(SCMP, 2)
39{
40	Store(S2BF(Arg0), Local0)
41	Store(S2BF(Arg1), Local1)
42	Store(Zero, Local4)
43	Store(SLEN(Arg0), Local5)
44	Store(SLEN(Arg1), Local6)
45	Store(MIN(Local5, Local6), Local7)
46
47	While (LLess(Local4, Local7)) {
48		Store(Derefof(Index(Local0, Local4)), Local2)
49		Store(Derefof(Index(Local1, Local4)), Local3)
50		If (LGreater(Local2, Local3)) {
51			Return (One)
52		} Else {
53			If (LLess(Local2, Local3)) {
54				Return (Ones)
55			}
56		}
57		Increment(Local4)
58	}
59
60	If (LLess(Local4, Local5)) {
61		Return (One)
62	} Else {
63		If (LLess(Local4, Local6)) {
64			Return (Ones)
65		} Else {
66			Return (Zero)
67		}
68	}
69}
70
71/*
72 * WCMP - Weak string compare
73 *
74 * Checks to find Arg1 at beginning of Arg0.
75 * Fails if length(Arg0) < length(Arg1).
76 * Returns 0 on fail, 1 on pass.
77 */
78Method(WCMP, 2)
79{
80	Store(S2BF(Arg0), Local0)
81	Store(S2BF(Arg1), Local1)
82	If (LLess(SLEN(Arg0), SLEN(Arg1))) {
83		Return (Zero)
84	}
85	Store(Zero, Local2)
86	Store(SLEN(Arg1), Local3)
87
88	While (LLess(Local2, Local3)) {
89		If (LNotEqual(Derefof(Index(Local0, Local2)),
90			Derefof(Index(Local1, Local2)))) {
91			Return (Zero)
92		}
93		Increment(Local2)
94	}
95
96	Return (One)
97}
98
99/*
100 * I2BM - Returns Bit Map
101 *
102 * Arg0 = IRQ Number (0-15)
103 */
104Method(I2BM, 1)
105{
106	Store(0, Local0)
107	If (LNotEqual(Arg0, 0)) {
108		Store(1, Local1)
109		ShiftLeft(Local1, Arg0, Local0)
110	}
111
112	Return (Local0)
113}
114