48 lines
830 B
C
48 lines
830 B
C
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// SPDX-License-Identifier: GPL-2.0
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#include <linux/types.h>
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#include <linux/errno.h>
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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/double.h>
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#include <math-emu/single.h>
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int
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lfs(void *frD, void *ea)
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{
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FP_DECL_D(R);
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FP_DECL_S(A);
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FP_DECL_EX;
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float f;
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#ifdef DEBUG
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printk("%s: D %p, ea %p\n", __func__, frD, ea);
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#endif
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if (copy_from_user(&f, ea, sizeof(float)))
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return -EFAULT;
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FP_UNPACK_S(A, f);
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#ifdef DEBUG
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printk("A: %ld %lu %ld (%ld) [%08lx]\n", A_s, A_f, A_e, A_c,
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*(unsigned long *)&f);
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#endif
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FP_CONV(D, S, 2, 1, R, A);
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#ifdef DEBUG
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printk("R: %ld %lu %lu %ld (%ld)\n", R_s, R_f1, R_f0, R_e, R_c);
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#endif
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if (R_c == FP_CLS_NAN) {
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R_e = _FP_EXPMAX_D;
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_FP_PACK_RAW_2_P(D, frD, R);
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} else {
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__FP_PACK_D(frD, R);
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}
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return 0;
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}
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