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
12fnmadds(void *frD, void *frA, void *frB, void *frC)
13{
14	FP_DECL_D(R);
15	FP_DECL_D(A);
16	FP_DECL_D(B);
17	FP_DECL_D(C);
18	FP_DECL_D(T);
19	FP_DECL_EX;
20
21#ifdef DEBUG
22	printk("%s: %p %p %p %p\n", __func__, frD, frA, frB, frC);
23#endif
24
25	FP_UNPACK_DP(A, frA);
26	FP_UNPACK_DP(B, frB);
27	FP_UNPACK_DP(C, frC);
28
29#ifdef DEBUG
30	printk("A: %ld %lu %lu %ld (%ld)\n", A_s, A_f1, A_f0, A_e, A_c);
31	printk("B: %ld %lu %lu %ld (%ld)\n", B_s, B_f1, B_f0, B_e, B_c);
32	printk("C: %ld %lu %lu %ld (%ld)\n", C_s, C_f1, C_f0, C_e, C_c);
33#endif
34
35	if ((A_c == FP_CLS_INF && C_c == FP_CLS_ZERO) ||
36	    (A_c == FP_CLS_ZERO && C_c == FP_CLS_INF))
37                FP_SET_EXCEPTION(EFLAG_VXIMZ);
38
39	FP_MUL_D(T, A, C);
40
41	if (T_s != B_s && T_c == FP_CLS_INF && B_c == FP_CLS_INF)
42		FP_SET_EXCEPTION(EFLAG_VXISI);
43
44	FP_ADD_D(R, T, B);
45
46	if (R_c != FP_CLS_NAN)
47		R_s ^= 1;
48
49#ifdef DEBUG
50	printk("D: %ld %lu %lu %ld (%ld)\n", R_s, R_f1, R_f0, R_e, R_c);
51#endif
52
53	__FP_PACK_DS(frD, R);
54
55	return FP_CUR_EXCEPTIONS;
56}
57