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 | |
10 | int |
11 | fnmsub(void *frD, void *frA, void *frB, void *frC) |
12 | { |
13 | FP_DECL_D(R); |
14 | FP_DECL_D(A); |
15 | FP_DECL_D(B); |
16 | FP_DECL_D(C); |
17 | FP_DECL_D(T); |
18 | FP_DECL_EX; |
19 | |
20 | #ifdef DEBUG |
21 | printk("%s: %p %p %p %p\n" , __func__, frD, frA, frB, frC); |
22 | #endif |
23 | |
24 | FP_UNPACK_DP(A, frA); |
25 | FP_UNPACK_DP(B, frB); |
26 | FP_UNPACK_DP(C, frC); |
27 | |
28 | #ifdef DEBUG |
29 | printk("A: %ld %lu %lu %ld (%ld)\n" , A_s, A_f1, A_f0, A_e, A_c); |
30 | printk("B: %ld %lu %lu %ld (%ld)\n" , B_s, B_f1, B_f0, B_e, B_c); |
31 | printk("C: %ld %lu %lu %ld (%ld)\n" , C_s, C_f1, C_f0, C_e, C_c); |
32 | #endif |
33 | |
34 | if ((A_c == FP_CLS_INF && C_c == FP_CLS_ZERO) || |
35 | (A_c == FP_CLS_ZERO && C_c == FP_CLS_INF)) |
36 | FP_SET_EXCEPTION(EFLAG_VXIMZ); |
37 | |
38 | FP_MUL_D(T, A, C); |
39 | |
40 | if (B_c != FP_CLS_NAN) |
41 | B_s ^= 1; |
42 | |
43 | if (T_s != B_s && T_c == FP_CLS_INF && B_c == FP_CLS_INF) |
44 | FP_SET_EXCEPTION(EFLAG_VXISI); |
45 | |
46 | FP_ADD_D(R, T, B); |
47 | |
48 | if (R_c != FP_CLS_NAN) |
49 | R_s ^= 1; |
50 | |
51 | #ifdef DEBUG |
52 | printk("D: %ld %lu %lu %ld (%ld)\n" , R_s, R_f1, R_f0, R_e, R_c); |
53 | #endif |
54 | |
55 | __FP_PACK_D(frD, R); |
56 | |
57 | return FP_CUR_EXCEPTIONS; |
58 | } |
59 | |