Orange Pi5 kernel

^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  1) // SPDX-License-Identifier: GPL-2.0-only
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  2) /* IEEE754 floating point arithmetic
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  3)  * double precision: common utilities
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  4)  */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  5) /*
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  6)  * MIPS floating point support
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  7)  * Copyright (C) 1994-2000 Algorithmics Ltd.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  8)  */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  9) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 10) #include "ieee754dp.h"
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 11) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 12) union ieee754dp ieee754dp_neg(union ieee754dp x)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 13) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 14) 	union ieee754dp y;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 15) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 16) 	if (ieee754_csr.abs2008) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 17) 		y = x;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 18) 		DPSIGN(y) = !DPSIGN(x);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 19) 	} else {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 20) 		unsigned int oldrm;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 21) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 22) 		oldrm = ieee754_csr.rm;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 23) 		ieee754_csr.rm = FPU_CSR_RD;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 24) 		y = ieee754dp_sub(ieee754dp_zero(0), x);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 25) 		ieee754_csr.rm = oldrm;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 26) 	}
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 27) 	return y;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 28) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 29) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 30) union ieee754dp ieee754dp_abs(union ieee754dp x)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 31) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 32) 	union ieee754dp y;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 33) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 34) 	if (ieee754_csr.abs2008) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 35) 		y = x;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 36) 		DPSIGN(y) = 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 37) 	} else {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 38) 		unsigned int oldrm;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 39) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 40) 		oldrm = ieee754_csr.rm;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 41) 		ieee754_csr.rm = FPU_CSR_RD;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 42) 		if (DPSIGN(x))
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 43) 			y = ieee754dp_sub(ieee754dp_zero(0), x);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 44) 		else
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 45) 			y = ieee754dp_add(ieee754dp_zero(0), x);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 46) 		ieee754_csr.rm = oldrm;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 47) 	}
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 48) 	return y;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 49) }