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 fmadd(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 (T_s != B_s && T_c == FP_CLS_INF && B_c == FP_CLS_INF)
41 FP_SET_EXCEPTION(EFLAG_VXISI);
42
43 FP_ADD_D(R, T, B);
44
45 #ifdef DEBUG
46 printk("D: %ld %lu %lu %ld (%ld)\n", R_s, R_f1, R_f0, R_e, R_c);
47 #endif
48
49 __FP_PACK_D(frD, R);
50
51 return FP_CUR_EXCEPTIONS;
52 }
53
Linux® is a registered trademark of Linus Torvalds in the United States and other countries.
TOMOYO® is a registered trademark of NTT DATA CORPORATION.