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In order for kernel to capture each denormalized output, the UDF trapping enable bit is always raised in $fpcsr. Because underflow case will issue not an underflow exception but also an inexact exception, it causes that the IEX, IEX cumulative exception, flag in $fpcsr to be raised in each denormalized output handling. To make the emulation transparent to the user, the emulator needs to clear the IEX flag in $fpcsr if the result is a denormalized number. However, if the IEX flag has been raised before this floating point emulation, this cleanup may be incorrect. To avoid the IEX flags in $fpcsr be raised in each denormalized output handling, the IEX trap shall be always enabled. Signed-off-by: Vincent Chen <vincentc@andestech.com> Acked-by: Greentime Hu <greentime@andestech.com> Signed-off-by: Greentime Hu <greentime@andestech.com>
14 lines
510 B
C
14 lines
510 B
C
/* SPDX-License-Identifier: GPL-2.0 */
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// Copyright (C) 2005-2017 Andes Technology Corporation
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#ifndef __ASM_NDS32_SYSCALLS_H
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#define __ASM_NDS32_SYSCALLS_H
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asmlinkage long sys_cacheflush(unsigned long addr, unsigned long len, unsigned int op);
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asmlinkage long sys_fadvise64_64_wrapper(int fd, int advice, loff_t offset, loff_t len);
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asmlinkage long sys_rt_sigreturn_wrapper(void);
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asmlinkage long sys_fp_udfiex_crtl(int cmd, int act);
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#include <asm-generic/syscalls.h>
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#endif /* __ASM_NDS32_SYSCALLS_H */
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