VisionFive2 Linux kernel

StarFive Tech Linux Kernel for VisionFive (JH7110) boards (mirror)

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b24413180f560 (Greg Kroah-Hartman 2017-11-01 15:07:57 +0100  1) // SPDX-License-Identifier: GPL-2.0
a71a29de4c2f9 (Yoshinori Sato     2015-01-28 02:48:15 +0900  2) #include "libgcc.h"
a71a29de4c2f9 (Yoshinori Sato     2015-01-28 02:48:15 +0900  3) 
a71a29de4c2f9 (Yoshinori Sato     2015-01-28 02:48:15 +0900  4) #define __ll_B ((UWtype) 1 << (W_TYPE_SIZE / 2))
a71a29de4c2f9 (Yoshinori Sato     2015-01-28 02:48:15 +0900  5) #define __ll_lowpart(t) ((UWtype) (t) & (__ll_B - 1))
a71a29de4c2f9 (Yoshinori Sato     2015-01-28 02:48:15 +0900  6) #define __ll_highpart(t) ((UWtype) (t) >> (W_TYPE_SIZE / 2))
a71a29de4c2f9 (Yoshinori Sato     2015-01-28 02:48:15 +0900  7) 
a71a29de4c2f9 (Yoshinori Sato     2015-01-28 02:48:15 +0900  8) #define umul_ppmm(w1, w0, u, v) \
a71a29de4c2f9 (Yoshinori Sato     2015-01-28 02:48:15 +0900  9) 	do {			   \
a71a29de4c2f9 (Yoshinori Sato     2015-01-28 02:48:15 +0900 10) 		UWtype __x0, __x1, __x2, __x3;	\
a71a29de4c2f9 (Yoshinori Sato     2015-01-28 02:48:15 +0900 11) 		UHWtype __ul, __vl, __uh, __vh; \
a71a29de4c2f9 (Yoshinori Sato     2015-01-28 02:48:15 +0900 12) 		__ul = __ll_lowpart(u);	\
a71a29de4c2f9 (Yoshinori Sato     2015-01-28 02:48:15 +0900 13) 		__uh = __ll_highpart(u);	\
a71a29de4c2f9 (Yoshinori Sato     2015-01-28 02:48:15 +0900 14) 		__vl = __ll_lowpart(v);	\
a71a29de4c2f9 (Yoshinori Sato     2015-01-28 02:48:15 +0900 15) 		__vh = __ll_highpart(v);	\
a71a29de4c2f9 (Yoshinori Sato     2015-01-28 02:48:15 +0900 16) 		__x0 = (UWtype) __ul * __vl;	\
a71a29de4c2f9 (Yoshinori Sato     2015-01-28 02:48:15 +0900 17) 		__x1 = (UWtype) __ul * __vh;	\
a71a29de4c2f9 (Yoshinori Sato     2015-01-28 02:48:15 +0900 18) 		__x2 = (UWtype) __uh * __vl;	\
a71a29de4c2f9 (Yoshinori Sato     2015-01-28 02:48:15 +0900 19) 		__x3 = (UWtype) __uh * __vh;	\
a71a29de4c2f9 (Yoshinori Sato     2015-01-28 02:48:15 +0900 20) 		__x1 += __ll_highpart(__x0);	\
a71a29de4c2f9 (Yoshinori Sato     2015-01-28 02:48:15 +0900 21) 		__x1 += __x2;			\
a71a29de4c2f9 (Yoshinori Sato     2015-01-28 02:48:15 +0900 22) 		if (__x1 < __x2)		\
a71a29de4c2f9 (Yoshinori Sato     2015-01-28 02:48:15 +0900 23) 			__x3 += __ll_B;		\
a71a29de4c2f9 (Yoshinori Sato     2015-01-28 02:48:15 +0900 24) 		(w1) = __x3 + __ll_highpart(__x1);	       \
a71a29de4c2f9 (Yoshinori Sato     2015-01-28 02:48:15 +0900 25) 		(w0) = __ll_lowpart(__x1) * __ll_B + __ll_lowpart(__x0); \
a71a29de4c2f9 (Yoshinori Sato     2015-01-28 02:48:15 +0900 26) 	} while (0)
a71a29de4c2f9 (Yoshinori Sato     2015-01-28 02:48:15 +0900 27) 
a71a29de4c2f9 (Yoshinori Sato     2015-01-28 02:48:15 +0900 28) #define __umulsidi3(u, v) (			\
a71a29de4c2f9 (Yoshinori Sato     2015-01-28 02:48:15 +0900 29) 		{				\
a71a29de4c2f9 (Yoshinori Sato     2015-01-28 02:48:15 +0900 30) 			DWunion __w;		\
a71a29de4c2f9 (Yoshinori Sato     2015-01-28 02:48:15 +0900 31) 			umul_ppmm(__w.s.high, __w.s.low, u, v);	\
a71a29de4c2f9 (Yoshinori Sato     2015-01-28 02:48:15 +0900 32) 			__w.ll; }					\
a71a29de4c2f9 (Yoshinori Sato     2015-01-28 02:48:15 +0900 33) 		)
a71a29de4c2f9 (Yoshinori Sato     2015-01-28 02:48:15 +0900 34) 
a71a29de4c2f9 (Yoshinori Sato     2015-01-28 02:48:15 +0900 35) DWtype __muldi3(DWtype u, DWtype v)
a71a29de4c2f9 (Yoshinori Sato     2015-01-28 02:48:15 +0900 36) {
a71a29de4c2f9 (Yoshinori Sato     2015-01-28 02:48:15 +0900 37) 	const DWunion uu = {.ll = u};
a71a29de4c2f9 (Yoshinori Sato     2015-01-28 02:48:15 +0900 38) 	const DWunion vv = {.ll = v};
a71a29de4c2f9 (Yoshinori Sato     2015-01-28 02:48:15 +0900 39) 	DWunion w = {.ll = __umulsidi3(uu.s.low, vv.s.low)};
a71a29de4c2f9 (Yoshinori Sato     2015-01-28 02:48:15 +0900 40) 
a71a29de4c2f9 (Yoshinori Sato     2015-01-28 02:48:15 +0900 41) 	w.s.high += ((UWtype) uu.s.low * (UWtype) vv.s.high
a71a29de4c2f9 (Yoshinori Sato     2015-01-28 02:48:15 +0900 42) 		     + (UWtype) uu.s.high * (UWtype) vv.s.low);
a71a29de4c2f9 (Yoshinori Sato     2015-01-28 02:48:15 +0900 43) 
a71a29de4c2f9 (Yoshinori Sato     2015-01-28 02:48:15 +0900 44) 	return w.ll;
a71a29de4c2f9 (Yoshinori Sato     2015-01-28 02:48:15 +0900 45) }