mirror of
https://github.com/AuxXxilium/linux_dsm_epyc7002.git
synced 2024-12-12 14:36:41 +07:00
c9b0299034
Convert the various /* fallthrough */ comments to the pseudo-keyword fallthrough; Done via script: https://lore.kernel.org/lkml/b56602fcf79f849e733e7b521bb0e17895d390fa.1582230379.git.joe@perches.com/ Signed-off-by: Liangliang Huang <huangll@lemote.com> Reviewed-by: Huacai Chen <chenhc@lemote.com> Signed-off-by: Thomas Bogendoerfer <tsbogend@alpha.franken.de>
74 lines
1.4 KiB
C
74 lines
1.4 KiB
C
// SPDX-License-Identifier: GPL-2.0-only
|
|
/* IEEE754 floating point arithmetic
|
|
* single precision
|
|
*/
|
|
/*
|
|
* MIPS floating point support
|
|
* Copyright (C) 1994-2000 Algorithmics Ltd.
|
|
*/
|
|
|
|
#include "ieee754sp.h"
|
|
#include "ieee754dp.h"
|
|
|
|
static inline union ieee754sp ieee754sp_nan_fdp(int xs, u64 xm)
|
|
{
|
|
return buildsp(xs, SP_EMAX + 1 + SP_EBIAS,
|
|
xm >> (DP_FBITS - SP_FBITS));
|
|
}
|
|
|
|
union ieee754sp ieee754sp_fdp(union ieee754dp x)
|
|
{
|
|
union ieee754sp y;
|
|
u32 rm;
|
|
|
|
COMPXDP;
|
|
COMPYSP;
|
|
|
|
EXPLODEXDP;
|
|
|
|
ieee754_clearcx();
|
|
|
|
FLUSHXDP;
|
|
|
|
switch (xc) {
|
|
case IEEE754_CLASS_SNAN:
|
|
x = ieee754dp_nanxcpt(x);
|
|
EXPLODEXDP;
|
|
fallthrough;
|
|
case IEEE754_CLASS_QNAN:
|
|
y = ieee754sp_nan_fdp(xs, xm);
|
|
if (!ieee754_csr.nan2008) {
|
|
EXPLODEYSP;
|
|
if (!ieee754_class_nan(yc))
|
|
y = ieee754sp_indef();
|
|
}
|
|
return y;
|
|
|
|
case IEEE754_CLASS_INF:
|
|
return ieee754sp_inf(xs);
|
|
|
|
case IEEE754_CLASS_ZERO:
|
|
return ieee754sp_zero(xs);
|
|
|
|
case IEEE754_CLASS_DNORM:
|
|
/* can't possibly be sp representable */
|
|
ieee754_setcx(IEEE754_UNDERFLOW);
|
|
ieee754_setcx(IEEE754_INEXACT);
|
|
if ((ieee754_csr.rm == FPU_CSR_RU && !xs) ||
|
|
(ieee754_csr.rm == FPU_CSR_RD && xs))
|
|
return ieee754sp_mind(xs);
|
|
return ieee754sp_zero(xs);
|
|
|
|
case IEEE754_CLASS_NORM:
|
|
break;
|
|
}
|
|
|
|
/*
|
|
* Convert from DP_FBITS to SP_FBITS+3 with sticky right shift.
|
|
*/
|
|
rm = (xm >> (DP_FBITS - (SP_FBITS + 3))) |
|
|
((xm << (64 - (DP_FBITS - (SP_FBITS + 3)))) != 0);
|
|
|
|
return ieee754sp_format(xs, xe, rm);
|
|
}
|