1 files changed, 88 insertions, 0 deletions
diff --git a/modules/mp_ia32/mp_asm.h b/modules/mp_ia32/mp_asm.h
new file mode 100644
index 000000000..8fb4af8fb
--- /dev/null
+++ b/modules/mp_ia32/mp_asm.h
@@ -0,0 +1,88 @@
+/*************************************************
+* 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 != 32)
+   #error The mp_ia32 module requires that BOTAN_MP_WORD_BITS == 32
+#endif
+
+namespace Botan {
+
+extern "C" {
+
+/*************************************************
+* Word Multiply                                  *
+*************************************************/
+inline word word_madd2(word a, word b, word c, word* carry)
+   {
+   asm(
+      "mull %1\n\t"        // a (eax) * b (anywhere) -> edx:eax
+      "addl %5,%0\n\t"     // add c to low word (eax)
+      "adcl $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(
+      "mull %1\n\t"        // a (eax) * b (anywhere) -> edx:eax
+      "addl %5,%0\n\t"     // add c to low word (eax)
+      "adcl $0,%2\n\t"     // add carry from previous add to high word (edx)
+      "addl %6,%0\n\t"     // add d to low word (eax)
+      "adcl $0,%2"         // add carry from previous add 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 x, word y)
+   {
+   asm(
+      "mull %[y]\n\t"      // a (eax) * b (anywhere) -> edx:eax
+      "addl %3,%[w0]\n\t"  // add c to low word (eax)
+      "adcl %4,%[w1]\n\t"  // add carry from previous add to high word (edx)
+      "adcl $0,%[w2]\n\t"  // add carry from previous add to high word (edx)
+      : [w0]"=r"(*w0), [w1]"=r"(*w1), [w2]"=r"(*w2)
+      : "a"(x), [y]"d"(y), "0"(*w0), "1"(*w1), "2"(*w2)
+      : "cc");
+   }
+
+/*************************************************
+* Multiply-Add Accumulator                       *
+*************************************************/
+inline void word3_muladd_2(word* w2, word* w1, word* w0, word x, word y)
+   {
+   asm(
+      "mull %[y]\n\t"      // a (eax) * b (anywhere) -> edx:eax
+      "addl %3,%[w0]\n\t"  // add c to low word (eax)
+      "adcl %4,%[w1]\n\t"  // add carry from previous add to high word (edx)
+      "adcl $0,%[w2]\n\t"  // add carry from previous add to high word (edx)
+      "addl %3,%[w0]\n\t"  // add c to low word (eax)
+      "adcl %4,%[w1]\n\t"  // add carry from previous add to high word (edx)
+      "adcl $0,%[w2]\n\t"  // add carry from previous add to high word (edx)
+      : [w0]"=r"(*w0), [w1]"=r"(*w1), [w2]"=r"(*w2)
+      : "a"(x), [y]"d"(y), "0"(*w0), "1"(*w1), "2"(*w2)
+      : "cc");
+   }
+
+}
+
+}
+
+#endif