diff options
Diffstat (limited to 'botan/src/math/bigint/mp_amd64/mp_asm.h')
-rw-r--r-- | botan/src/math/bigint/mp_amd64/mp_asm.h | 69 |
1 files changed, 69 insertions, 0 deletions
diff --git a/botan/src/math/bigint/mp_amd64/mp_asm.h b/botan/src/math/bigint/mp_amd64/mp_asm.h new file mode 100644 index 0000000..fa66d04 --- /dev/null +++ b/botan/src/math/bigint/mp_amd64/mp_asm.h @@ -0,0 +1,69 @@ +/* +* Lowest Level MPI Algorithms +* (C) 1999-2008 Jack Lloyd +* 2006 Luca Piccarreta +* +* Distributed under the terms of the Botan license +*/ + +#ifndef BOTAN_MP_ASM_H__ +#define BOTAN_MP_ASM_H__ + +#include <botan/mp_types.h> + +#if (BOTAN_MP_WORD_BITS != 64) + #error The mp_amd64 module requires that BOTAN_MP_WORD_BITS == 64 +#endif + +namespace Botan { + +extern "C" { + +/* +* Helper Macros for amd64 Assembly +*/ +#define ASM(x) x "\n\t" + +/* +* Word Multiply +*/ +inline word word_madd2(word a, word b, word* c) + { + asm( + ASM("mulq %[b]") + ASM("addq %[c],%[a]") + ASM("adcq $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("mulq %[b]") + + ASM("addq %[c],%[a]") + ASM("adcq $0,%[carry]") + + ASM("addq %[d],%[a]") + ASM("adcq $0,%[carry]") + + : [a]"=a"(a), [b]"=rm"(b), [carry]"=&d"(*d) + : "0"(a), "1"(b), [c]"g"(c), [d]"g"(*d) : "cc"); + + return a; + } + +#undef ASM + +} + +} + +#endif |