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/arch/powerpc/math-emu/fsqrts.c

http://github.com/mirrors/linux
C | 42 lines | 31 code | 10 blank | 1 comment | 5 complexity | 836feb1be523fd5fcfc7e8ba7bb9eff4 MD5 | raw file
 1// SPDX-License-Identifier: GPL-2.0
 2#include <linux/types.h>
 3#include <linux/errno.h>
 4#include <linux/uaccess.h>
 5
 6#include <asm/sfp-machine.h>
 7#include <math-emu/soft-fp.h>
 8#include <math-emu/double.h>
 9#include <math-emu/single.h>
10
11int
12fsqrts(void *frD, void *frB)
13{
14	FP_DECL_D(B);
15	FP_DECL_D(R);
16	FP_DECL_EX;
17
18#ifdef DEBUG
19	printk("%s: %p %p %p %p\n", __func__, frD, frB);
20#endif
21
22	FP_UNPACK_DP(B, frB);
23
24#ifdef DEBUG
25	printk("B: %ld %lu %lu %ld (%ld)\n", B_s, B_f1, B_f0, B_e, B_c);
26#endif
27
28	if (B_s && B_c != FP_CLS_ZERO)
29		FP_SET_EXCEPTION(EFLAG_VXSQRT);
30	if (B_c == FP_CLS_NAN)
31		FP_SET_EXCEPTION(EFLAG_VXSNAN);
32
33	FP_SQRT_D(R, B);
34
35#ifdef DEBUG
36	printk("R: %ld %lu %lu %ld (%ld)\n", R_s, R_f1, R_f0, R_e, R_c);
37#endif
38
39	__FP_PACK_DS(frD, R);
40
41	return FP_CUR_EXCEPTIONS;
42}