threeeye
bc1d038eac
Squashed backup commit (no shallow-clone history issues) of xiaomi-mt6833-dev/kernel_xiaomi_mt6833 (lineage-23.2 branch, upstream commit 9eece662e) plus all fixes applied to get everpal_defconfig building clean against a modern (GCC 15.2.0) toolchain -- see the previous commit message on the lineage-23.2 branch (also in this repo history is not available here since this is a squashed snapshot; full incremental history lives in the local DL380 checkout and the upstream GitHub remote). Upstream: https://github.com/xiaomi-mt6833-dev/kernel_xiaomi_mt6833 (lineage-23.2)
56 lines
1.1 KiB
C
56 lines
1.1 KiB
C
/*
|
|
* IEEE754 floating point arithmetic
|
|
* double 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 "ieee754dp.h"
|
|
|
|
int ieee754dp_2008class(union ieee754dp x)
|
|
{
|
|
COMPXDP;
|
|
|
|
EXPLODEXDP;
|
|
|
|
/*
|
|
* 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;
|
|
}
|
|
}
|