1 #include <linux/types.h>
2 #include <linux/errno.h>
3 #include <asm/uaccess.h>
4
5 #include <asm/sfp-machine.h>
6 #include <math-emu/soft-fp.h>
7 #include <math-emu/double.h>
8
9 int
fsub(void * frD,void * frA,void * frB)10 fsub(void *frD, void *frA, void *frB)
11 {
12 FP_DECL_D(A);
13 FP_DECL_D(B);
14 FP_DECL_D(R);
15 FP_DECL_EX;
16
17 #ifdef DEBUG
18 printk("%s: %p %p %p\n", __func__, frD, frA, frB);
19 #endif
20
21 FP_UNPACK_DP(A, frA);
22 FP_UNPACK_DP(B, frB);
23
24 #ifdef DEBUG
25 printk("A: %ld %lu %lu %ld (%ld)\n", A_s, A_f1, A_f0, A_e, A_c);
26 printk("B: %ld %lu %lu %ld (%ld)\n", B_s, B_f1, B_f0, B_e, B_c);
27 #endif
28
29 if (B_c != FP_CLS_NAN)
30 B_s ^= 1;
31
32 if (A_s != B_s && A_c == FP_CLS_INF && B_c == FP_CLS_INF)
33 FP_SET_EXCEPTION(EFLAG_VXISI);
34
35 FP_ADD_D(R, A, B);
36
37 #ifdef DEBUG
38 printk("D: %ld %lu %lu %ld (%ld)\n", R_s, R_f1, R_f0, R_e, R_c);
39 #endif
40
41 __FP_PACK_D(frD, R);
42
43 return FP_CUR_EXCEPTIONS;
44 }
45