1 files changed, 207 insertions, 0 deletions
diff --git a/src/math/mp/mp_generic/mp_asmi.h b/src/math/mp/mp_generic/mp_asmi.h
new file mode 100644
index 000000000..8225f372d
--- /dev/null
+++ b/src/math/mp/mp_generic/mp_asmi.h
@@ -0,0 +1,207 @@
+/*
+* Lowest Level MPI Algorithms
+* (C) 1999-2010 Jack Lloyd
+*     2006 Luca Piccarreta
+*
+* Distributed under the terms of the Botan license
+*/
+
+#ifndef BOTAN_MP_ASM_INTERNAL_H__
+#define BOTAN_MP_ASM_INTERNAL_H__
+
+#include <botan/internal/mp_asm.h>
+
+namespace Botan {
+
+extern "C" {
+
+/*
+* Word Addition
+*/
+inline word word_add(word x, word y, word* carry)
+   {
+   word z = x + y;
+   word c1 = (z < x);
+   z += *carry;
+   *carry = c1 | (z < *carry);
+   return z;
+   }
+
+/*
+* Eight Word Block Addition, Two Argument
+*/
+inline word word8_add2(word x[8], const word y[8], word carry)
+   {
+   x[0] = word_add(x[0], y[0], &carry);
+   x[1] = word_add(x[1], y[1], &carry);
+   x[2] = word_add(x[2], y[2], &carry);
+   x[3] = word_add(x[3], y[3], &carry);
+   x[4] = word_add(x[4], y[4], &carry);
+   x[5] = word_add(x[5], y[5], &carry);
+   x[6] = word_add(x[6], y[6], &carry);
+   x[7] = word_add(x[7], y[7], &carry);
+   return carry;
+   }
+
+/*
+* Eight Word Block Addition, Three Argument
+*/
+inline word word8_add3(word z[8], const word x[8],
+                       const word y[8], word carry)
+   {
+   z[0] = word_add(x[0], y[0], &carry);
+   z[1] = word_add(x[1], y[1], &carry);
+   z[2] = word_add(x[2], y[2], &carry);
+   z[3] = word_add(x[3], y[3], &carry);
+   z[4] = word_add(x[4], y[4], &carry);
+   z[5] = word_add(x[5], y[5], &carry);
+   z[6] = word_add(x[6], y[6], &carry);
+   z[7] = word_add(x[7], y[7], &carry);
+   return carry;
+   }
+
+/*
+* Word Subtraction
+*/
+inline word word_sub(word x, word y, word* carry)
+   {
+   word t0 = x - y;
+   word c1 = (t0 > x);
+   word z = t0 - *carry;
+   *carry = c1 | (z > t0);
+   return z;
+   }
+
+/*
+* Eight Word Block Subtraction, Two Argument
+*/
+inline word word8_sub2(word x[8], const word y[8], word carry)
+   {
+   x[0] = word_sub(x[0], y[0], &carry);
+   x[1] = word_sub(x[1], y[1], &carry);
+   x[2] = word_sub(x[2], y[2], &carry);
+   x[3] = word_sub(x[3], y[3], &carry);
+   x[4] = word_sub(x[4], y[4], &carry);
+   x[5] = word_sub(x[5], y[5], &carry);
+   x[6] = word_sub(x[6], y[6], &carry);
+   x[7] = word_sub(x[7], y[7], &carry);
+   return carry;
+   }
+
+/*
+* Eight Word Block Subtraction, Two Argument
+*/
+inline word word8_sub2_rev(word x[8], const word y[8], word carry)
+   {
+   x[0] = word_sub(y[0], x[0], &carry);
+   x[1] = word_sub(y[1], x[1], &carry);
+   x[2] = word_sub(y[2], x[2], &carry);
+   x[3] = word_sub(y[3], x[3], &carry);
+   x[4] = word_sub(y[4], x[4], &carry);
+   x[5] = word_sub(y[5], x[5], &carry);
+   x[6] = word_sub(y[6], x[6], &carry);
+   x[7] = word_sub(y[7], x[7], &carry);
+   return carry;
+   }
+
+/*
+* Eight Word Block Subtraction, Three Argument
+*/
+inline word word8_sub3(word z[8], const word x[8],
+                       const word y[8], word carry)
+   {
+   z[0] = word_sub(x[0], y[0], &carry);
+   z[1] = word_sub(x[1], y[1], &carry);
+   z[2] = word_sub(x[2], y[2], &carry);
+   z[3] = word_sub(x[3], y[3], &carry);
+   z[4] = word_sub(x[4], y[4], &carry);
+   z[5] = word_sub(x[5], y[5], &carry);
+   z[6] = word_sub(x[6], y[6], &carry);
+   z[7] = word_sub(x[7], y[7], &carry);
+   return carry;
+   }
+
+/*
+* Eight Word Block Linear Multiplication
+*/
+inline word word8_linmul2(word x[8], word y, word carry)
+   {
+   x[0] = word_madd2(x[0], y, &carry);
+   x[1] = word_madd2(x[1], y, &carry);
+   x[2] = word_madd2(x[2], y, &carry);
+   x[3] = word_madd2(x[3], y, &carry);
+   x[4] = word_madd2(x[4], y, &carry);
+   x[5] = word_madd2(x[5], y, &carry);
+   x[6] = word_madd2(x[6], y, &carry);
+   x[7] = word_madd2(x[7], y, &carry);
+   return carry;
+   }
+
+/*
+* Eight Word Block Linear Multiplication
+*/
+inline word word8_linmul3(word z[8], const word x[8], word y, word carry)
+   {
+   z[0] = word_madd2(x[0], y, &carry);
+   z[1] = word_madd2(x[1], y, &carry);
+   z[2] = word_madd2(x[2], y, &carry);
+   z[3] = word_madd2(x[3], y, &carry);
+   z[4] = word_madd2(x[4], y, &carry);
+   z[5] = word_madd2(x[5], y, &carry);
+   z[6] = word_madd2(x[6], y, &carry);
+   z[7] = word_madd2(x[7], y, &carry);
+   return carry;
+   }
+
+/*
+* Eight Word Block Multiply/Add
+*/
+inline word word8_madd3(word z[8], const word x[8], word y, word carry)
+   {
+   z[0] = word_madd3(x[0], y, z[0], &carry);
+   z[1] = word_madd3(x[1], y, z[1], &carry);
+   z[2] = word_madd3(x[2], y, z[2], &carry);
+   z[3] = word_madd3(x[3], y, z[3], &carry);
+   z[4] = word_madd3(x[4], y, z[4], &carry);
+   z[5] = word_madd3(x[5], y, z[5], &carry);
+   z[6] = word_madd3(x[6], y, z[6], &carry);
+   z[7] = word_madd3(x[7], y, z[7], &carry);
+   return carry;
+   }
+
+/*
+* Multiply-Add Accumulator
+*/
+inline void word3_muladd(word* w2, word* w1, word* w0, word a, word b)
+   {
+   word carry = *w0;
+   *w0 = word_madd2(a, b, &carry);
+   *w1 += carry;
+   *w2 += (*w1 < carry) ? 1 : 0;
+   }
+
+/*
+* Multiply-Add Accumulator
+*/
+inline void word3_muladd_2(word* w2, word* w1, word* w0, word a, word b)
+   {
+   word carry = 0;
+   a = word_madd2(a, b, &carry);
+   b = carry;
+
+   word top = (b >> (BOTAN_MP_WORD_BITS-1));
+   b <<= 1;
+   b |= (a >> (BOTAN_MP_WORD_BITS-1));
+   a <<= 1;
+
+   carry = 0;
+   *w0 = word_add(*w0, a, &carry);
+   *w1 = word_add(*w1, b, &carry);
+   *w2 = word_add(*w2, top, &carry);
+   }
+
+}
+
+}
+
+#endif