Initial checkin1.5.6

1 files changed, 84 insertions, 0 deletions

diff --git a/modules/mp_amd64/mp_asm.h b/modules/mp_amd64/mp_asm.h
new file mode 100644
index 000000000..17f33224c
--- /dev/null
+++ b/modules/mp_amd64/mp_asm.h
@@ -0,0 +1,84 @@
+/*************************************************
+* Lowest Level MPI Algorithms Header File        *
+* (C) 1999-2006 The Botan Project                *
+*************************************************/
+
+#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" {
+
+/*************************************************
+* Word Multiply                                  *
+*************************************************/
+inline word word_madd2(word a, word b, word c, word* carry)
+   {
+   asm(
+      "mulq %1\n\t"        // a(in eax) * b(wherever) -> edx:eax
+      "addq %5,%0\n\t"     // add c to low word (eax)
+      "adcq $0,%2"         // add carry from previous to high word (edx)
+      : "=a"(a), "=rm"(b), "=&d"(*carry)
+      : "0"(a), "1"(b), "g"(c) : "cc");
+   return a;
+   }
+
+/*************************************************
+* Word Multiply/Add                              *
+*************************************************/
+inline word word_madd3(word a, word b, word c, word d, word* carry)
+   {
+   asm(
+      "mulq %1\n\t"        // a(in eax) * b(wherever) -> edx:eax
+      "addq %5,%0\n\t"     // add c to low word (eax)
+      "adcq $0,%2\n\t"     // add carry from previous to high word (edx)
+      "addq %6,%0\n\t"     // add d to low word (eax)
+      "adcq $0,%2"         // add carry from previous to high word (edx)
+      : "=a"(a), "=rm"(b), "=&d"(*carry)
+      : "0"(a), "1"(b), "g"(c), "g"(d) : "cc");
+   return a;
+   }
+
+/*************************************************
+* Multiply-Add Accumulator                       *
+*************************************************/
+inline void word3_muladd(word* w2, word* w1, word* w0, word a, word b)
+   {
+   asm("mulq %[b]\n\t"        // a(in eax) * b(wherever) -> edx:eax
+       "addq %3,%[w0]\n\t"     // add c to low word (eax)
+       "adcq %4,%[w1]\n\t"     // add carry from previous to high word (edx)
+       "adcq $0,%[w2]\n\t"     // add carry from previous to high word (edx)
+       : [w0]"=r"(*w0), [w1]"=r"(*w1), [w2]"=r"(*w2)
+       : "a"(a), [b]"d"(b), "0"(*w0), "1"(*w1), "2"(*w2)
+       : "cc");
+   }
+
+/*************************************************
+* Multiply-Add Accumulator                       *
+*************************************************/
+inline void word3_muladd_2(word* w2, word* w1, word* w0, word a, word b)
+   {
+   asm("mulq %[b]\n\t"        // a(in eax) * b(wherever) -> edx:eax
+       "addq %3,%[w0]\n\t"     // add c to low word (eax)
+       "adcq %4,%[w1]\n\t"     // add carry from previous to high word (edx)
+       "adcq $0,%[w2]\n\t"     // add carry from previous to high word (edx)
+       "addq %3,%[w0]\n\t"     // add c to low word (eax)
+       "adcq %4,%[w1]\n\t"     // add carry from previous to high word (edx)
+       "adcq $0,%[w2]\n\t"     // add carry from previous to high word (edx)
+       : [w0]"=r"(*w0), [w1]"=r"(*w1), [w2]"=r"(*w2)
+       : "a"(a), [b]"d"(b), "0"(*w0), "1"(*w1), "2"(*w2)
+       : "cc");
+      }
+
+}
+
+}
+
+#endif