| /* | |
| * IEEE754 floating point arithmetic | |
| * single precision: CLASS.f | |
| * FPR[fd] = class(FPR[fs]) | |
| * | |
| * MIPS floating point support | |
| * Copyright (C) 2015 Imagination Technologies, Ltd. | |
| * Author: Markos Chandras <markos.chandras@imgtec.com> | |
| * | |
| * This program is free software; you can distribute it and/or modify it | |
| * under the terms of the GNU General Public License as published by the | |
| * Free Software Foundation; version 2 of the License. | |
| */ | |
| #include "ieee754sp.h" | |
| int ieee754sp_2008class(union ieee754sp x) | |
| { | |
| COMPXSP; | |
| EXPLODEXSP; | |
| /* | |
| * 10 bit mask as follows: | |
| * | |
| * bit0 = SNAN | |
| * bit1 = QNAN | |
| * bit2 = -INF | |
| * bit3 = -NORM | |
| * bit4 = -DNORM | |
| * bit5 = -ZERO | |
| * bit6 = INF | |
| * bit7 = NORM | |
| * bit8 = DNORM | |
| * bit9 = ZERO | |
| */ | |
| switch(xc) { | |
| case IEEE754_CLASS_SNAN: | |
| return 0x01; | |
| case IEEE754_CLASS_QNAN: | |
| return 0x02; | |
| case IEEE754_CLASS_INF: | |
| return 0x04 << (xs ? 0 : 4); | |
| case IEEE754_CLASS_NORM: | |
| return 0x08 << (xs ? 0 : 4); | |
| case IEEE754_CLASS_DNORM: | |
| return 0x10 << (xs ? 0 : 4); | |
| case IEEE754_CLASS_ZERO: | |
| return 0x20 << (xs ? 0 : 4); | |
| default: | |
| pr_err("Unknown class: %d\n", xc); | |
| return 0; | |
| } | |
| } |