138db37baSMarkos Chandras /* 238db37baSMarkos Chandras * IEEE754 floating point arithmetic 338db37baSMarkos Chandras * single precision: CLASS.f 438db37baSMarkos Chandras * FPR[fd] = class(FPR[fs]) 538db37baSMarkos Chandras * 638db37baSMarkos Chandras * MIPS floating point support 738db37baSMarkos Chandras * Copyright (C) 2015 Imagination Technologies, Ltd. 838db37baSMarkos Chandras * Author: Markos Chandras <markos.chandras@imgtec.com> 938db37baSMarkos Chandras * 1038db37baSMarkos Chandras * This program is free software; you can distribute it and/or modify it 1138db37baSMarkos Chandras * under the terms of the GNU General Public License as published by the 1238db37baSMarkos Chandras * Free Software Foundation; version 2 of the License. 1338db37baSMarkos Chandras */ 1438db37baSMarkos Chandras 1538db37baSMarkos Chandras #include "ieee754sp.h" 1638db37baSMarkos Chandras 1738db37baSMarkos Chandras int ieee754sp_2008class(union ieee754sp x) 1838db37baSMarkos Chandras { 1938db37baSMarkos Chandras COMPXSP; 2038db37baSMarkos Chandras 2138db37baSMarkos Chandras EXPLODEXSP; 2238db37baSMarkos Chandras 2338db37baSMarkos Chandras /* 2438db37baSMarkos Chandras * 10 bit mask as follows: 2538db37baSMarkos Chandras * 2638db37baSMarkos Chandras * bit0 = SNAN 2738db37baSMarkos Chandras * bit1 = QNAN 2838db37baSMarkos Chandras * bit2 = -INF 2938db37baSMarkos Chandras * bit3 = -NORM 3038db37baSMarkos Chandras * bit4 = -DNORM 3138db37baSMarkos Chandras * bit5 = -ZERO 3238db37baSMarkos Chandras * bit6 = INF 3338db37baSMarkos Chandras * bit7 = NORM 3438db37baSMarkos Chandras * bit8 = DNORM 3538db37baSMarkos Chandras * bit9 = ZERO 3638db37baSMarkos Chandras */ 3738db37baSMarkos Chandras 3838db37baSMarkos Chandras switch(xc) { 3938db37baSMarkos Chandras case IEEE754_CLASS_SNAN: 4038db37baSMarkos Chandras return 0x01; 4138db37baSMarkos Chandras case IEEE754_CLASS_QNAN: 4238db37baSMarkos Chandras return 0x02; 4338db37baSMarkos Chandras case IEEE754_CLASS_INF: 4438db37baSMarkos Chandras return 0x04 << (xs ? 0 : 4); 4538db37baSMarkos Chandras case IEEE754_CLASS_NORM: 4638db37baSMarkos Chandras return 0x08 << (xs ? 0 : 4); 4738db37baSMarkos Chandras case IEEE754_CLASS_DNORM: 4838db37baSMarkos Chandras return 0x10 << (xs ? 0 : 4); 4938db37baSMarkos Chandras case IEEE754_CLASS_ZERO: 5038db37baSMarkos Chandras return 0x20 << (xs ? 0 : 4); 5138db37baSMarkos Chandras default: 5238db37baSMarkos Chandras pr_err("Unknown class: %d\n", xc); 5338db37baSMarkos Chandras return 0; 5438db37baSMarkos Chandras } 5538db37baSMarkos Chandras } 56