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-rw-r--r--src/math/mp/mp_generic/mp_asmi.h207
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diff --git a/src/math/mp/mp_generic/mp_asmi.h b/src/math/mp/mp_generic/mp_asmi.h
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-/*
-* 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_madd.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