/* * linux/kernel/math/mul.c * * (C) 1991 Linus Torvalds *//* * temporary real multiplication routine. */#include <linux/math_emu.h>static void shift(int * c){	__asm__("movl (%0),%%eax ; addl %%eax,(%0)\n\t"		"movl 4(%0),%%eax ; adcl %%eax,4(%0)\n\t"		"movl 8(%0),%%eax ; adcl %%eax,8(%0)\n\t"		"movl 12(%0),%%eax ; adcl %%eax,12(%0)"		::"r" ((long) c):"ax");}static void mul64(const temp_real * a, const temp_real * b, int * c){	__asm__("movl (%0),%%eax\n\t"		"mull (%1)\n\t"		"movl %%eax,(%2)\n\t"		"movl %%edx,4(%2)\n\t"		"movl 4(%0),%%eax\n\t"		"mull 4(%1)\n\t"		"movl %%eax,8(%2)\n\t"		"movl %%edx,12(%2)\n\t"		"movl (%0),%%eax\n\t"		"mull 4(%1)\n\t"		"addl %%eax,4(%2)\n\t"		"adcl %%edx,8(%2)\n\t"		"adcl $0,12(%2)\n\t"		"movl 4(%0),%%eax\n\t"		"mull (%1)\n\t"		"addl %%eax,4(%2)\n\t"		"adcl %%edx,8(%2)\n\t"		"adcl $0,12(%2)"		::"b" ((long) a),"c" ((long) b),"D" ((long) c)		:"ax","dx");}void fmul(const temp_real * src1, const temp_real * src2, temp_real * result){	int i,sign;	int tmp[4] = {0,0,0,0};	sign = (src1->exponent ^ src2->exponent) & 0x8000;	i = (src1->exponent & 0x7fff) + (src2->exponent & 0x7fff) - 16383 + 1;	if (i<0) {		result->exponent = sign;		result->a = result->b = 0;		return;	}	if (i>0x7fff) {		set_OE();		return;	}	mul64(src1,src2,tmp);	if (tmp[0] || tmp[1] || tmp[2] || tmp[3])		while (i && tmp[3] >= 0) {			i--;			shift(tmp);		}	else		i = 0;	result->exponent = i | sign;	result->a = tmp[2];	result->b = tmp[3];}