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
11 int
12 fmsubs(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 (B_c != FP_CLS_NAN)
42 B_s ^= 1;
43
44 if (T_s != B_s && T_c == FP_CLS_INF && B_c == FP_CLS_INF)
45 FP_SET_EXCEPTION(EFLAG_VXISI);
46
47 FP_ADD_D(R, T, B);
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
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