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
9int
10fmsub(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