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