1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
|
/*************************************************
* Lowest Level MPI Algorithms Header File *
* (C) 1999-2008 Jack Lloyd *
* 2006 Luca Piccarreta *
*************************************************/
#ifndef BOTAN_MP_ASM_H__
#define BOTAN_MP_ASM_H__
#include <botan/mp_types.h>
#if (BOTAN_MP_WORD_BITS != 32)
#error The mp_ia32 module requires that BOTAN_MP_WORD_BITS == 32
#endif
namespace Botan {
extern "C" {
/*************************************************
* Helper Macros for x86 Assembly *
*************************************************/
#define ASM(x) x "\n\t"
/*************************************************
* Word Multiply *
*************************************************/
inline word word_madd2(word a, word b, word* c)
{
asm(
ASM("mull %[b]")
ASM("addl %[c],%[a]")
ASM("adcl $0,%[carry]")
: [a]"=a"(a), [b]"=rm"(b), [carry]"=&d"(*c)
: "0"(a), "1"(b), [c]"g"(*c) : "cc");
return a;
}
/*************************************************
* Word Multiply/Add *
*************************************************/
inline word word_madd3(word a, word b, word c, word* d)
{
asm(
ASM("mull %[b]")
ASM("addl %[c],%[a]")
ASM("adcl $0,%[carry]")
ASM("addl %[d],%[a]")
ASM("adcl $0,%[carry]")
: [a]"=a"(a), [b]"=rm"(b), [carry]"=&d"(*d)
: "0"(a), "1"(b), [c]"g"(c), [d]"g"(*d) : "cc");
return a;
}
}
}
#endif
|
