1 files changed, 119 insertions, 0 deletions
diff --git a/modules/mp_asm64/mp_asm.h b/modules/mp_asm64/mp_asm.h
new file mode 100644
index 000000000..8c6df078e
--- /dev/null
+++ b/modules/mp_asm64/mp_asm.h
@@ -0,0 +1,119 @@
+/*************************************************
+* MPI Multiply-Add Core Header File              *
+* (C) 1999-2006 The Botan Project                *
+*************************************************/
+
+#ifndef BOTAN_MP_MADD_H__
+#define BOTAN_MP_MADD_H__
+
+#include <botan/mp_types.h>
+
+#if (BOTAN_MP_WORD_BITS != 64)
+   #error The mp_asm64 module requires that BOTAN_MP_WORD_BITS == 64
+#endif
+
+#if defined(BOTAN_TARGET_ARCH_IS_AMD64)
+
+#define BOTAN_WORD_MUL(a,b,z1,z0) do {       \
+   asm("mulq %3" : "=d" (z0), "=a" (z1) :    \
+       "a" (a), "rm" (b) : "cc");            \
+} while(0);
+
+#elif defined(BOTAN_TARGET_ARCH_IS_ALPHA)
+
+#define BOTAN_WORD_MUL(a,b,z1,z0) do {                   \
+   asm("umulh %1,%2,%0" : "=r" (z0) : "r" (a), "r" (b)); \
+   z1 = a * b;                                           \
+} while(0);
+
+#elif defined(BOTAN_TARGET_ARCH_IS_IA64)
+
+#define BOTAN_WORD_MUL(a,b,z1,z0) do {                     \
+   asm("xmpy.hu %0=%1,%2" : "=f" (z0) : "f" (a), "f" (b)); \
+   z1 = a * b;                                             \
+} while(0);
+
+#elif defined(BOTAN_TARGET_ARCH_IS_PPC64)
+
+#define BOTAN_WORD_MUL(a,b,z1,z0) do {                           \
+   asm("mulhdu %0,%1,%2" : "=r" (z0) : "r" (a), "r" (b) : "cc"); \
+   z1 = a * b;                                                   \
+} while(0);
+
+#elif defined(BOTAN_TARGET_ARCH_IS_MIPS64)
+
+#define BOTAN_WORD_MUL(a,b,z1,z0) do {                            \
+   asm("dmultu %2,%3" : "=h" (z0), "=l" (z1) : "r" (a), "r" (b)); \
+} while(0);
+
+#else
+
+#include <botan/mp_core.h>
+
+#define BOTAN_WORD_MUL(a,b,z1,z0) \
+   do { bigint_wordmul(a, b, &z1, &z0); } while(0);
+
+#endif
+
+namespace Botan {
+
+/*************************************************
+* Word Multiply/Add                              *
+*************************************************/
+inline word word_madd2(word a, word b, word c, word* carry)
+   {
+   word z0 = 0, z1 = 0;
+
+   BOTAN_WORD_MUL(a, b, z1, z0);
+
+   z1 += c; if(z1 < c) z0++;
+
+   *carry = z0;
+   return z1;
+   }
+
+/*************************************************
+* Word Multiply/Add                              *
+*************************************************/
+inline word word_madd3(word a, word b, word c, word d, word* carry)
+   {
+   word z0 = 0, z1 = 0;
+
+   BOTAN_WORD_MUL(a, b, z1, z0);
+
+   z1 += c; if(z1 < c) z0++;
+   z1 += d; if(z1 < d) z0++;
+
+   *carry = z0;
+   return z1;
+   }
+
+/*************************************************
+* Multiply-Add Accumulator                       *
+*************************************************/
+inline void word3_muladd(word* w2, word* w1, word* w0, word a, word b)
+   {
+   *w0 = word_madd2(a, b, *w0, &a);
+   *w1 += a;
+   *w2 += (*w1 < a) ? 1 : 0;
+   }
+
+/*************************************************
+* Multiply-Add Accumulator                       *
+*************************************************/
+inline void word3_muladd_2(word* w2, word* w1, word* w0, word a, word b)
+   {
+   a = word_madd2(a, b, 0, &b);
+
+   *w0 += a;
+   *w1 += b + ((*w0 < a) ? 1 : 0);
+   *w2 += (*w1 < b) ? 1 : 0;
+
+   *w0 += a;
+   *w1 += b + ((*w0 < a) ? 1 : 0);
+   *w2 += (*w1 < b) ? 1 : 0;
+   }
+
+}
+
+#endif