forked from Minki/linux
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
609 B
C
30 lines
609 B
C
// SPDX-License-Identifier: GPL-2.0
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// Copyright (C) 2005-2019 Andes Technology Corporation
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#include <linux/uaccess.h>
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#include <asm/sfp-machine.h>
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#include <math-emu/soft-fp.h>
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#include <math-emu/single.h>
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void fs2si(void *ft, void *fa)
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{
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int r;
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FP_DECL_S(A);
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FP_DECL_EX;
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FP_UNPACK_SP(A, fa);
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if (A_c == FP_CLS_INF) {
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*(int *)ft = (A_s == 0) ? 0x7fffffff : 0x80000000;
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__FPU_FPCSR |= FP_EX_INVALID;
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} else if (A_c == FP_CLS_NAN) {
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*(int *)ft = 0xffffffff;
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__FPU_FPCSR |= FP_EX_INVALID;
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} else {
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FP_TO_INT_ROUND_S(r, A, 32, 1);
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__FPU_FPCSR |= FP_CUR_EXCEPTIONS;
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*(int *)ft = r;
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}
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}
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