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
fsubs(void * frD,void * frA,void * frB)12 fsubs(void *frD, void *frA, void *frB)
13 {
14 FP_DECL_D(A);
15 FP_DECL_D(B);
16 FP_DECL_D(R);
17 FP_DECL_EX;
18
19 #ifdef DEBUG
20 printk("%s: %p %p %p\n", __func__, frD, frA, frB);
21 #endif
22
23 FP_UNPACK_DP(A, frA);
24 FP_UNPACK_DP(B, frB);
25
26 #ifdef DEBUG
27 printk("A: %ld %lu %lu %ld (%ld)\n", A_s, A_f1, A_f0, A_e, A_c);
28 printk("B: %ld %lu %lu %ld (%ld)\n", B_s, B_f1, B_f0, B_e, B_c);
29 #endif
30
31 if (B_c != FP_CLS_NAN)
32 B_s ^= 1;
33
34 if (A_s != B_s && A_c == FP_CLS_INF && B_c == FP_CLS_INF)
35 FP_SET_EXCEPTION(EFLAG_VXISI);
36
37 FP_ADD_D(R, A, B);
38
39 #ifdef DEBUG
40 printk("D: %ld %lu %lu %ld (%ld)\n", R_s, R_f1, R_f0, R_e, R_c);
41 #endif
42
43 __FP_PACK_DS(frD, R);
44
45 return FP_CUR_EXCEPTIONS;
46 }
47