mirror of
https://github.com/AuxXxilium/linux_dsm_epyc7002.git
synced 2024-12-27 19:55:05 +07:00
9322961205
The existing floating point emulations is only available for floating instruction that possibly issue denormalized input and underflow exceptions. These existing FPU emulations are not sufficient when IEx Trap is enabled because some floating point instructions only issue inexact exception. This patch adds the emulations of such floating point instructions. Signed-off-by: Vincent Chen <vincentc@andestech.com> Acked-by: Greentime Hu <greentime@andestech.com> Signed-off-by: Greentime Hu <greentime@andestech.com>
30 lines
605 B
C
30 lines
605 B
C
// SPDX-License-Identifier: GPL-2.0
|
|
// Copyright (C) 2005-2019 Andes Technology Corporation
|
|
#include <linux/uaccess.h>
|
|
|
|
#include <asm/sfp-machine.h>
|
|
#include <math-emu/soft-fp.h>
|
|
#include <math-emu/single.h>
|
|
|
|
void fs2si_z(void *ft, void *fa)
|
|
{
|
|
int r;
|
|
|
|
FP_DECL_S(A);
|
|
FP_DECL_EX;
|
|
|
|
FP_UNPACK_SP(A, fa);
|
|
|
|
if (A_c == FP_CLS_INF) {
|
|
*(int *)ft = (A_s == 0) ? 0x7fffffff : 0x80000000;
|
|
__FPU_FPCSR |= FP_EX_INVALID;
|
|
} else if (A_c == FP_CLS_NAN) {
|
|
*(int *)ft = 0xffffffff;
|
|
__FPU_FPCSR |= FP_EX_INVALID;
|
|
} else {
|
|
FP_TO_INT_S(r, A, 32, 1);
|
|
__FPU_FPCSR |= FP_CUR_EXCEPTIONS;
|
|
*(int *)ft = r;
|
|
}
|
|
}
|