mul_toom22.c 文件参考

#include "../../include/lammp/impl/tmp_alloc.h"
#include "../../include/lammp/lmmpn.h"

mul_toom22.c 的引用(Include)关系图:

浏览源代码.

宏定义
#define	a0   numa
#define	a1   (numa + n)
#define	asm1   dst
#define	b0   numb
#define	b1   (numb + n)
#define	bsm1   (dst + n)
#define	v0   dst
#define	vinf   (dst + 2 * n)

函数
void	lmmp_mul_toom22_ (mp_ptr restrict dst, mp_srcptr restrict numa, mp_size_t na, mp_srcptr restrict numb, mp_size_t nb)

宏定义说明

a0

#define a0   numa

a1

#define a1   (numa + n)

asm1

#define asm1   dst

b0

#define b0   numb

b1

#define b1   (numb + n)

bsm1

#define bsm1   (dst + n)

v0

#define v0   dst

vinf

#define vinf   (dst + 2 * n)

函数说明

lmmp_mul_toom22_()

void lmmp_mul_toom22_	(	mp_ptr restrict	dst,
		mp_srcptr restrict	numa,
		mp_size_t	na,
		mp_srcptr restrict	numb,
		mp_size_t	nb
	)

在文件 mul_toom22.c 第 23 行定义.

                                                                                                                         {
    lmmp_param_assert(nb >= 5);
    lmmp_param_assert(na >= nb);
    lmmp_param_assert(4 * na <= 5 * nb);
    TEMP_S_DECL;
    mp_size_t s = na >> 1, n = na - s, t = nb - n;
    mp_limb_t* restrict vm1 = SALLOC_TYPE(2 * n, mp_limb_t);
    int vm1_neg = 0;
    mp_slimb_t cy, cy2;
 
#define a0 numa
#define a1 (numa + n)
#define b0 numb
#define b1 (numb + n)
#define asm1 dst
#define bsm1 (dst + n)
 
    if (s == n) {
        if (lmmp_cmp_(a0, a1, n) < 0) {
            lmmp_sub_n_(asm1, a1, a0, n);
            vm1_neg = 1;
        } else
            lmmp_sub_n_(asm1, a0, a1, n);
    } else {  // s==n-1
        if (a0[s] == 0 && lmmp_cmp_(a0, a1, s) < 0) {
            lmmp_sub_n_(asm1, a1, a0, s);
            asm1[s] = 0;
            vm1_neg = 1;
        } else
            asm1[s] = a0[s] - lmmp_sub_n_(asm1, a0, a1, s);
    }
 
    if (t == n) {
        if (lmmp_cmp_(b0, b1, n) < 0) {
            lmmp_sub_n_(bsm1, b1, b0, n);
            vm1_neg ^= 1;
        } else
            lmmp_sub_n_(bsm1, b0, b1, n);
    } else {
        if (lmmp_zero_q_(b0 + t, n - t) && lmmp_cmp_(b0, b1, t) < 0) {
            lmmp_sub_n_(bsm1, b1, b0, t);
            lmmp_zero(bsm1 + t, n - t);
            vm1_neg ^= 1;
        } else
            lmmp_sub_(bsm1, b0, n, b1, t);
    }
 
    lmmp_mul_n_(vm1, asm1, bsm1, n);
 
#undef asm1
#undef bsm1
#define v0 dst
#define vinf (dst + 2 * n)
 
    lmmp_mul_n_(v0, a0, b0, n);
 
    lmmp_mul_(vinf, a1, s, b1, t);
 
    cy = lmmp_add_n_(dst + 2 * n, v0 + n, vinf, n);
    cy2 = cy + lmmp_add_n_(dst + n, dst + 2 * n, v0, n);
    cy += lmmp_add_(dst + 2 * n, dst + 2 * n, n, vinf + n, s + t - n);
 
    if (vm1_neg)
        cy += lmmp_add_n_(dst + n, dst + n, vm1, 2 * n);
    else
        cy -= lmmp_sub_n_(dst + n, dst + n, vm1, 2 * n);
 
    // no overflow, if s+t>n. proved.
    lmmp_inc_1(dst + 2 * n, cy2);
 
    if (cy < 0)
        lmmp_dec(dst + 3 * n);
    else
        lmmp_inc_1(dst + 3 * n, cy);
    TEMP_S_FREE;
}

引用了 a0, a1, asm1, b0, b1, bsm1, lmmp_add_(), lmmp_add_n_(), lmmp_cmp_(), lmmp_dec, lmmp_inc_1, lmmp_mul_(), lmmp_mul_n_(), lmmp_param_assert, lmmp_sub_(), lmmp_sub_n_(), lmmp_zero, lmmp_zero_q_(), SALLOC_TYPE, TEMP_S_DECL, TEMP_S_FREE, v0, vinf , 以及 vm1.

函数调用图: