// SPDX-License-Identifier: GPL-2.0#include <linux/export.h> #include "libgcc.h" /* * GCC 7 & older can suboptimally generate __multi3 calls for mips64r6, so for * that specific case only we implement that intrinsic here. * * See https://gcc.gnu.org/bugzilla/show_bug.cgi?id=82981 */#if defined(CONFIG_64BIT) && defined(CONFIG_CPU_MIPSR6) && (__GNUC__ < 8) /* multiply 64-bit values, low 64-bits returned */static inline long long notrace dmulu(long long a, long long b){	long long res; 	asm ("dmulu %0,%1,%2" : "=r" (res) : "r" (a), "r" (b));	return res;} /* multiply 64-bit unsigned values, high 64-bits of 128-bit result returned */static inline long long notrace dmuhu(long long a, long long b){	long long res; 	asm ("dmuhu %0,%1,%2" : "=r" (res) : "r" (a), "r" (b));	return res;} /* multiply 128-bit values, low 128-bits returned */ti_type notrace __multi3(ti_type a, ti_type b){	TWunion res, aa, bb; 	aa.ti = a;	bb.ti = b; 	/*	 * a * b =           (a.lo * b.lo)	 *         + 2^64  * (a.hi * b.lo + a.lo * b.hi)	 *        [+ 2^128 * (a.hi * b.hi)]	 */	res.s.low = dmulu(aa.s.low, bb.s.low);	res.s.high = dmuhu(aa.s.low, bb.s.low);	res.s.high += dmulu(aa.s.high, bb.s.low);	res.s.high += dmulu(aa.s.low, bb.s.high); 	return res.ti;}EXPORT_SYMBOL(__multi3); #endif /* 64BIT && CPU_MIPSR6 && GCC7 */