1*ea65cc9bSThomas Gleixner // SPDX-License-Identifier: GPL-2.0-only 238db37baSMarkos Chandras /* 338db37baSMarkos Chandras * IEEE754 floating point arithmetic 438db37baSMarkos Chandras * single precision: CLASS.f 538db37baSMarkos Chandras * FPR[fd] = class(FPR[fs]) 638db37baSMarkos Chandras * 738db37baSMarkos Chandras * MIPS floating point support 838db37baSMarkos Chandras * Copyright (C) 2015 Imagination Technologies, Ltd. 938db37baSMarkos Chandras * Author: Markos Chandras <markos.chandras@imgtec.com> 1038db37baSMarkos Chandras */ 1138db37baSMarkos Chandras 1238db37baSMarkos Chandras #include "ieee754sp.h" 1338db37baSMarkos Chandras ieee754sp_2008class(union ieee754sp x)1438db37baSMarkos Chandrasint ieee754sp_2008class(union ieee754sp x) 1538db37baSMarkos Chandras { 1638db37baSMarkos Chandras COMPXSP; 1738db37baSMarkos Chandras 1838db37baSMarkos Chandras EXPLODEXSP; 1938db37baSMarkos Chandras 2038db37baSMarkos Chandras /* 2138db37baSMarkos Chandras * 10 bit mask as follows: 2238db37baSMarkos Chandras * 2338db37baSMarkos Chandras * bit0 = SNAN 2438db37baSMarkos Chandras * bit1 = QNAN 2538db37baSMarkos Chandras * bit2 = -INF 2638db37baSMarkos Chandras * bit3 = -NORM 2738db37baSMarkos Chandras * bit4 = -DNORM 2838db37baSMarkos Chandras * bit5 = -ZERO 2938db37baSMarkos Chandras * bit6 = INF 3038db37baSMarkos Chandras * bit7 = NORM 3138db37baSMarkos Chandras * bit8 = DNORM 3238db37baSMarkos Chandras * bit9 = ZERO 3338db37baSMarkos Chandras */ 3438db37baSMarkos Chandras 3538db37baSMarkos Chandras switch(xc) { 3638db37baSMarkos Chandras case IEEE754_CLASS_SNAN: 3738db37baSMarkos Chandras return 0x01; 3838db37baSMarkos Chandras case IEEE754_CLASS_QNAN: 3938db37baSMarkos Chandras return 0x02; 4038db37baSMarkos Chandras case IEEE754_CLASS_INF: 4138db37baSMarkos Chandras return 0x04 << (xs ? 0 : 4); 4238db37baSMarkos Chandras case IEEE754_CLASS_NORM: 4338db37baSMarkos Chandras return 0x08 << (xs ? 0 : 4); 4438db37baSMarkos Chandras case IEEE754_CLASS_DNORM: 4538db37baSMarkos Chandras return 0x10 << (xs ? 0 : 4); 4638db37baSMarkos Chandras case IEEE754_CLASS_ZERO: 4738db37baSMarkos Chandras return 0x20 << (xs ? 0 : 4); 4838db37baSMarkos Chandras default: 4938db37baSMarkos Chandras pr_err("Unknown class: %d\n", xc); 5038db37baSMarkos Chandras return 0; 5138db37baSMarkos Chandras } 5238db37baSMarkos Chandras } 53